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Book JS^tiL.  - 


COPYRIGHT  DEPOSIT 


Scanned  from  the  collections  of 
The  Library  of  Congress 


AUDIO-VISUAL  CONSERVATION 
at  The  LIBRARY  of' CONGRESS 


Packard  Campus 

for  Audio  Visual  Conservation 

www.loc.gov/avconservation 

Motion  Picture  and  Television  Reading  Room 
www.loc.gov/rr/mopic 

Recorded  Sound  Reference  Center 
www.loc.gov/rr/record 


List  'em,  -  Phone   'em,  —  then   GO   SELL  'E 


Six  ways  to  move  stock,  page  13 


Eight  ways  to   bri 


buyers,  page 


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\  K  6,540 


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OFF  TO  A 
FLYING  START 
THE  NEW  1938 

GENERAL 
ELECTRIC 


<m 


[iM 


TOPPING  THEM  Al 


THE  POPULAR  PRICE  CLASS 


The  Sensational  Mode1 


SELL  THE  LINE 

THAT  LEADS  IN 

AUTOMATIC  TUNING 

G-E  TOUCH  TUNING 


*   9  TUBES 


•   AUTOMAT 


*  LOUVER   Di, 

*  TWO  STAGES 


NING  Press  a  button — that's  alii 
NING 


•  AUTOMATIC  TONE  COMPENSATION 


*  12-inch  STABILIZED  DYNAMIC  SPEAKER 

•  CUSTOM-CRAFT  FULL-SIZE  CABINET 


I 


GENERAL    ELECTRIC 

RADIO 


Appliance  and   Merchandise   Department,   General   Electric   Company,   Bridgeport,   Connecticut 


4* 


Sf* 


The 
$  nil-absorbing  questi 


every  service  man 


is  aski 


v  iV 


'    -   4 


What  will 

MALLORY-YAXLEY 

do  next  ? 


Tor  years  Mallory-Yaxley  has  answered  the  question  with  innova- 
tions that  amazed  the  industry.  And  every  time  Mallory-Yaxley  answers 
the  question,  it  means  a  step  forward  in  better  servicing,  better  prod- 
ucts and  better  profits. 

Mallory-Yaxley  has  met  the  service  man's  question  in  the  past  with 
answers  such  as  ljJBthe  Mallory-Yaxley  Radio  Service  Encyclopedia 
^(a  Condensers  that  are  universal  in  application  J^  Volume  Controls 
that  are  really  silent  fly  with  "a  mere  handful"  of  Vibrators  that  service 
over  3,000,000  automobile  radio  sets  UR  with  perfect  portable  power,  in 
the  Mallory  Vibrapack. 

Now  the  question  for  1938  is  about  to  be  answered  !  .  .  . 

What  will  Mallory-Yaxley  do  next  ? 

You  will  know  mighty  soon  ! 


P.    R.    MALLORY     &    CO.,    Inc.   •  INDIANAPOLIS,     INDIANA 


Cable     Address—  PELMALLO 


JJse                                - 

REPLACEMENT 

CONDENSERS..  ..VIBRATORS 

^"      R  E  PLACE  M  E  NT  TV^' 
VOLUME  CONTROLS 

RADIO    TODAY,    January,    1938,  Vol.    IV,    No.    1,   published   monthly   by    Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.     Subscription 

~-r       i^?Sy  *1-00  ln  U-  S-  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.     Entered  as  second-class  matter  July  24, 

Z.      1936,  at  the  post  office  at  New  York,   N.   Y.,  under  the  Act  of   March   3,    1879.     Printed    in    U.    S.   A.      Copyright    1938    by    Caldwell-Clements,    Inc. 

r 
m 


±mer$on 

At  Lowest  Price  in  Emerson   History  .  .  .  Sensational  New 


•  5-TUBE  AC-DC 

BA-199 

•  STANDARD   AMERICAN 
BROADCAST  and  POLICE  CALLS 

•  ELECTRO  DYNAMIC  SPEAKER 
for  true,  clear  TONE. 

•  AUDIO  OVERLOAD  CONTROL 

•  WALNUT  BAKELITE  CABINET 


When  the  public  can  buy  an  EMERSON  RADIO  at  $9.95— that's 
NEWS!  When  YOU  can  feature  a  set  ...  at  $9.95  .  .  .  that  bears  the 
nationally  known  name  of  Emerson — that  lives  up  to  Emerson's 
QUALITY  tradition — and  make  a  good  mark-up  on  it — that's  NEWS 
that  leads  to  SALES  ACTION! 

EMERSON 
Model   AU-190 


Five-Tube  AC-DC  su- 
perheterodyne i  n  a 
new,  modern  molded 
cabinet  in  choice  of 
two  colors  —  Natural 
Onyx  and  Brazilian 
Onyx.  Gemloid  Dial. 
Full  size  dynamic 
speaker.  Standard 
Broadcast,  Police 
Bands,  Amateur  and 
Aeroplane   Stations. 


EMERSON   Model  AY-195 


*29 


95 


"MIRACLE  TUNING"  —  "MIRACLE  DIAL"  — 
"MIRACLE  TONE  CHAMBER"  —  6  tube  AC/DC 
superheterodyne.  American,  Foreign,  Police.  Dy- 
namic     speaker;      automatic  _vol-    <£  ^M  ^AC 


Same   list  price   everywhere 
in  U.S.A. 


ume  control;  tone  control.  Band 
Indicator.  Hand-rubbed  walnut 
cabinet. 


$59! 

Same  list  price 
everyzvhere  in  U.S.A. 


ADV ERTI SIM G— DEALER   PROMOTION  HELPS    • 


Timerpon, 

Rodin  and 
Television 

«/ 


The  Emerson  program  of  advertising  for  1938  will  be  far  more  extensive  than  ever  before.  Plans 
for  national  and  local  advertising,  radio  broadcast,  colorful  literature  are  now  going  forward. 
Everything   that   will   help   to    sell    and    make   money    is    included    in    the    new    Emerson    program. 

48    EMERSON    MODELS— TABLE     SETS— COMBINATION     RADIO     AND     PHONOGRAPH    MODELS — 


EMERSON   RADIO   &   PHONOGRAPH  CORP.     •     111  Eighth  Ave. 

Cable  Address:  Emphonoco,  N.  Y. 

World's  Largest  Maker  of  Small  Radios 


•     New  York,  N.  Y. 


Radio  Today 


Presents 

Miracle  Dial  . . .  Miracle  Tuning  . . .  Miracle  Tone  Chamber 


{Mechanical   and   Design    Patents 
Pending) 

INTRODUCING— 

Emerson  "MIRACLE 
TUNING":  push  button 
tuning  with  a  plus — six 
frequency  ranges — easily 
changeable  from  the  front 
of  cabinet,  over  the  en- 
tire broadcast   band. 

merson  "MIRACLE 
•IAL":  here  is  the  mod- 
n  table  model  tuning, 
isible  from  any  stand- 
:g  or  sitting  position. 
_he  entire  calibration 
surface   is   flood-lighted. 

Improved    "MIRACLE 
TONE  CHAMBER" 

Ask    for    new    broadside 
with  all  details. 


EMERSON  Model  AZ-196— 

"MIRACLE  TUNING"  —  "MIRACLE  DIAL"  —  "MIRACLE 
TONE  CHAMBER"  —  6-tube  AC  superheterodyne.  American, 
Foreign,  Police.  Dynamic  speaker;  automatic  volume  control,  tone 
control.     Band  Indicator.     Hand-rubbed  walnut  cabinet. 


$59 


95 


Same   list  pric, 
everywhere 
in  U.S.A. 


EMERSON  Model  BF-191 


EMERSON  Model  BD 


with  Miracle  Dial 


$25 


95 


A  six-tube  AC-DC  superheterodyne  in 
a  bakelite  cabinet  with  artistic  lines 
expressing  the  last  word  in  modern  day 
styling.  For  Standard  American  Broad- 
cast. Police  Calls  and  Foreign  and  Amer- 
ican Short  Wave.  Automatic  volume 
control;  tone  control;  dynamic  speak- 
er. Choice  of  colors — walnut  or  ivory. 

•    CAPITALIZE    ON 

As  with  all  other  Emerson  Models,  you  make  a  substantial 
ments  in  themselves.   They  will  bring  customers  in  and  sell 


(WALNUT) 

Same  list  price 

everywhere 

in  U.S.A. 


Six-tube  AC-DC  superheterodyne  Emerson  achieves  a  new  note  in  unique 
originality  and  exceptional  beauty  in  radio  styling  in  this  model  created 
by  Count  Alexis  De  Sakhnoffsky  exclusively  ^  __         ^ 

for  Emerson.     Bent  pencil-striped  American  *k  • J  C  ^  9  5 

walnut.  Lustrous  hand-rubbed  finish. 
American,  Foreign  and  Police  Bands.  Dy- 
namic speaker;  automatic  volume  control; 
tone    control.      Band    indicator. 


*39 

Same  list  price 
everywhere  in  U.S.A. 

THESE   SENSATIONS   NOW!    • 

profit  on  these  new  creations.   More  than  that,  these  sets  are  genuine  advertise- 
themselves.  Write,  wire  or  telephone  your  distributor  or  direct,  for  all  details! 

CONSOLES —  PORTABLE  MODELS— BATTERY  SETS— FROM    $9.95   to    $139.95.       (Uniform    list    prices    everywhere.) 
EMERSON  RADIO  &  PHONOGRAPH  CORPORATION    •    111  Eighth  Avenue    •     New  York,  N.  Y. 


January,  1938 


Cable  Address:   Emphonoco,  N.  Y. 

World's  Largest  Maker  oj  Small  Radios 


The  year's  "best  seller"  in  the  automobile  radio  field  ...  a  sure  fire,  year 
'round  business  getter  for  every  radio  dealer — the  sensational  Crosley  Fiver 
Roamio!  Stock  this  remarkable  receiver  and  make  your  radio  "sales  and 
profits  curve"  shoot  up. 

CROSLEY  FIVER  ROAMIO— 5-tube  superheterodyne  .  .  .  Octal  base 
tubes  .  .  .  Full  automatic  volume  control  .  .  .  strong  clear  volume  .  .  .  Large, 
easily-read,  illuminated  Mirro-Dial  .  .  .  One  piece  installation  .  .  .  Low 
battery  drain. 

(Prices  slightly  higher  in  South  and  West.) 

THE  CROSLEY  RADIO  CORPORATION,  CINCINNATI  *powel  crosley,  jr., Pres. 

Home  of  ''tiie  Ration's  Station'', — WLW — 500,000  watts — 70  on  your  dial 


YOU'RE    THERE   WITH  A  €*©*bE^ 


Radio   Today 


TUBE  MARKET 


OVER  ten  million  sets  bearing  the  Philco 
name  have  been  sold  in  Ameriea.  To 
every  owner  of  a  Philco  Radio . . .  Philco  Tubes 
are  the  natural,  inevitable  first  choice  when 
replacements  are  needed.  That  means  the  big- 
gest tube  market  in  all  the  world  belongs  by 
right  to  the  dealer  who  sells  Philco  Tubes! 

But  there's  an  even  bigger  market  than  that, 
wide  open  for  Philco  Tubes.  Due  to  Philco 
prestige,  Philco  popularity,  Philco  advertising 
...owners  of  other  makes  of  radio  will  accept 
Philco  Tubes  without  hesitation. 

With  millions  of  tube  sockets  needing  new 
tubes  for  better  performance  in  1938,  the 
dealer  who  concentrates  on  Philco  Tubes  stands 
in  an  enviable  position  to  make  real  money. 


'J/PHJLCOi 


RADIO 
TUBE 


•  • 


• 


%e  SukitTu^ed.  Uttfte  'Wob/ct  fa  Skit 


The  -<£-  time  leader 

. . .  twice ! 


For  the  second  consecutive  year,  the  Columbia  Network  continues 
its  leadership  in  all  three  major  phases  of  network  advertising : 

Columbia,  in  1937,  carried  the  greatest  dollar-volume  of 
advertising  of  any  network  in  the  history  of  radio.* 

Columbia,  in  1937,  was  the  choice  of  more  of  the  coun- 
try's leading  advertisers  than  any  other  network.** 

Columbia,  in  1937,  continued  as  the  world's  largest  radio 
network.*** 

This  record,  of  course,  is  not  Columbia's  alone.  It  was  made  by 
the  most  careful  buyers  of  advertising  in  the  world— who  increased 
their  average  expenditure  for  Columbia  Network  facilities  this  year 
over  last  by  25.9%.  

*  And  did  so  last  year. 
**And  has  been  for  four  consecutive  years. 
***And  has  been  for  five  consecutive  years. 


Radio  Today 


In  the  detailed  record  of  the  CBS  advertisers  is  the  answer  to  every 
basic  question  you  can  ask  about  radio  and  radio  advertising :  What 
do  listeners  think  of  radio?  Do  they  enjoy  itf  The  answers  to  these 
questions  are  written  by  the  advertisers  themselves ;  advertisers  who, 
in  a  single  medium,  find  the  swiftest  road  to  any  market  you  can 
name !  Obviously,  before  these  advertisers  can  make  sales,  they  must 
make  friends  of  America's  86  millions  of  listeners— make  friends 
through  radio's  programs— and  Columbia.  Interlocked  with  this  sell- 
ing—linked as  strongly  as  the  stations  to  the  Network— are  the  sales 
of  radio  sets  in  1937.  For  the  same  programs  which  do  the  selling 
furnish— in  their  entertainment— the  incentive  to  the  listener  for  buy- 
ing a  radio.  But  they're  only  half  the  reason  ! 

Throughout  the  year,  some  22,475  Columbia  programs  were  broad- 
cast to  the  nation.  More  than  half  of  these  were  programs  'by  Colum- 
bia'— produced  by  the  network  in  the  living  and  challenging  fields  of 
Public  Affairs,  Education.  Serious  Music,  Religion,  Special  Events 
and  Sports.  These  programs  round  out  the  schedule  of  the  world's 
largest  network,  bringing  the  world's  voice,  as  well  as  its  goods, 
home  to  the  nation— wherever  home  may  be. 
The   COLUMBIA    BROADCASTING   SYSTEM 


January,  1938 


"THE  RECORD  SPEAK 
FOR  ITSELF" 


HARRY  BOVD  BROWN 

National  Merchandising 
Manager  oj  Philco 


WHEN  the  going  gets  tough,  the  radio  dealers  of  America 
know  they  can  depend  upon  the  strong,  steady  public  de- 
mand for  Philco.  They  also  know  that  they  can  rely  on  Philco 
Leadership.  History  proves  it.  And  history  is  repeating  itself  in 
1938 — because  Philco  national  advertising  for  this  Spring  Season  will 
continue  in  tremendous  volume  without  interruption. 

The  country  is  in  the  midst  of  a  general  business  depression.  It  should  be 
of  short  duration.  At  least  most  people  think  so,  and  all  signs  indicate  it.  The 
basic  economic  situation  is  good,  and  it  seems  possible  for  business  recovery 
to  be  built  up  quickly. 

However — depression  or  no  depression,  good  times  or  bad — the  radio 
dealers  can  depend  upon  Philco.  The  record  speaks  for  itself.  For  more  than 
8  years — through  days  of  national  prosperity  and  on  through  the  darkest  days 
of  business  depression — Philco  has  carried  on  the  most  gigantic,  the  most 
consistent  advertising  program  in  radio  history.  And  Philco  is  not  changing 
from  that  program  of  action  one  iota  today. 

Remember  also — that  more  than  30  million  radios  are  in  use  in  the  United 
States  today  in  home  and  automobile.  They  are  an  absolute  necessity.  The 
American  public  cannot  live  without  them.  And  they  are  wearing  out  by  the 
millions.  They  are  becoming  obsolete  by  the  millions. 

The  replacement  of  these  millions  of  worn  out  and  obsolete  squatter-type 
radios  is  inevitable.  The  less  that  are  sold  today  because  of  business  uncertain- 
ty, means  the  more  will  be  sold  tomorrow.  Postponed  purchases — millions 
of  them — will  rapidly  blossom  into  sales  as  business  recovery  moves  ahead. 

That  is  why  Philco  advertising  will  carry  on  in  ever  increasing  volume. 
And  7  out  of  every  10  people — who  ask  for  any  particular  radio — will  con- 
tinue to  ask  for  Philco — the  radio  with  the  Inclined  Control  Panel  which 
means  "No  Squat!  No  Stoop!  No  Squint!" — the  amazingly  popular  slogan 
that  has  put  Philco  on  the  tip  of  everybody's  tongue. 

Millions  of  people  of  all  ages  and  in  all  walks  of  life,  are  absolutely  sold 
today  on  Philco,  and  Philco  will  be  their  next  radio  whether  they  buy  today 
— tomorrow — next  month  or  next  year. 


PttttC 


<-sy-*^A*^Ji>^^ 


Radio  Tod 


©C1B 


366130 


Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
J.  E.  Neary,  Jr. 
M.  H.  Newton 
B.  V.  Spinetta 
Vinton    K.    Ulrich 


Lee    Robinson 

Sales    Manager 


JAN  20  MB 


Orestes     H.     Caldwell 
Editor 


M.    Clements 
Publisher 


Copyright   1938 

Caldwell-Clements,  Inc. 

4S0    Lexington    Ave. 

New   York,   N.    Y. 

Tel.    PLaza   3-1340 

Vol.    IV,    No.    1. 


7,700,000  RADIOS  IN  1937 

*  A  dour  December  for  radio 
took  a  brighter  turn  the  last  half  of 
the  month,  and  retail  sales  picked 
up,  ending  the  year  with  a  more 
cheerful  trade  attitude.  Sales  for 
December,  however,  ran  40  to  45  per 
cent  behind  a  year  ago,  and  this 
ratio  prevailed  during  the  final  quar- 
ter of  1937,  indicating  that  fourth- 
quarter  radio-set  sales  would  not  ex- 
ceed 1,700,000  sets.  Added  to  the 
6,000,000  radios  sold  during  the  first 
three  quarters  (see  December  issue, 
page  7),  total  sales  for  the  year  are 
now  estimated  at  from  7,600,000  to 
7,700,000  sets.  This  will  represent  a 
falling-off  of  about  7  per  cent  from 
the  all-time  high  established  in  radio- 
set  production  and  sales  last  year 
when  the  final  official  total  was  8,248,- 
755  sets. 


"WIRELESS  REMOTE  CONTROL" 
ON  SPRING  MODELS 

*  Great  interest  has  been  mani- 
fested in  the  new  "wireless  remote 
control"  coming  for  home  radio  sets. 
Ey  means  of  carrier-controlled  relays, 
a  radio  on  the  opposite  side  of  the 
room  or  in  another  room,  can  be 
turned  on,  off,  tuned  to  any  of  six 
stations,  and  have  its  volume  adjusted 
up  qt  down.  No  tubes  need  to  be 
burning  in  the  radio  to  be  thus  turned 
on.  The  control  unit  is  a  small  box 
with  push-buttons  and  a  cord  which 
can  be  plugged  in  to  any  nearby  elec- 
trical outlet.  All  control  is  effected 
over  the  house  electrical  wiring,  with- 
out any  control  cord  leading  from  the 
push-button  box  to  the  distant  set. 

A  number  of  leading  manufactur- 
ers have  indicated  that  they  will  bring 
out  such  "wireless  remote-control'' 
sets  this  Spring  in  their  higher- 
bracket  models. 

With  "wireless  control"  in  the  top- 
flight sets,  and  push-button  tuning 
penetrating  into  the  radio  price  range 


as  low  as  $30,  the  new  Spring  models 
are  expected  to  exert  powerful  obso- 
leting  effect   on  home  radios  now  in 


FACTORY  STOCKS  CLEAR; 
TRADE  STILL  TANGLED  UP 

*  Survey  of  radio-set  inventories 
immediately  after  the  first  of  the 
year,  showed  that  the  delayed  Christ- 
mas business  had  been  a  factor  in 
considerably  clearing  up  the  over- 
stocked condition  feared  earlier.  Fac- 
tory stocks  of  sets  on  hand  have  by 
this  time  been  pretty  well  cleared, 
largely  as  a  result  of  drastic  curtail- 
ment of  production. 

Stocks  in  the  hands  of  jobbers,  dis- 
tributors and  dealers  are  still  heavy, 
and  moving  slowly.  The  test  of  the 
present  situation  will  probably  come 
at  the  end  of  January  or  the  middle 
of  February,  though  herculean  efforts 
now  being  made  to  help  retailers 
move  sets  into  homes,  may  ease  the 
threat  of  dumping  in  1938.  New  items 


being  introduced  to  sweeten  lines, 
will  help  interest  the  public.  With 
radio  listening  now  at  an  all-time 
high,  and  the  majority  of  radio  sets 
already  past  their  retirement  limit, 
the  Spring  outlook  is  encouraging, 
as  the  general  business  situation 
brightens. 

RADIO  STATISTICS,  WAVE- 
LENGTHS, IN  PART  TWO 

*  For  the  convenience  of  our 
radio  readers,  a  timely  two-page  chart 
of  the  complete  radio  and  audio 
spectrums,  embodying  the  new  radio- 
frequency  assignments  issued  by  the 
Federal  Communications  Commission 
in  its  order  of  Oct.  13,  1937,  is  pre- 
sented in  Part  Two  of  this  January 
issue  of  Radio  Today. 

Occupying  other  pages  in  Part 
Two,  the  editors  of  Radio  Today  pre- 
sent the  complete  basic  statistics  of 
the  radio  industry  for  1938,  covering 
sales  of  receivers,  tubes,  replacement 
parts,    and    supplementary    merchan- 


January,  1938 


Philco  execs  toss  a  surprise  dinner  for  E.  R.  Alexander,  second  from  left,  on  his 

wind-up  of  20  years  as  Pennsylvania  jobber.      Otherwise,  left   to   right,   Philco's 

Harry  Boyd  Brown,  Peter  Kain,  and  President  Larry  E.  Gubb. 


dise,  radio  sets  in  use,  broadcasting. 
Unfolded  copies  of  the  radio  spec- 
trum, suitable  for  framing,  may  be 
obtained  by  sending  10  cents  in 
stamps  to  Eadio  Today,  480  Lexing- 
ton Ave..  New  York,  N.  T. 

SUDDEN  RUSH  TO  FACSIMILE 

*  While  television  is  occupying 
the  headlines,  without  much  happen- 
ing in  a  commercial  way,  the  long- 
languishing  art  of  "facsimile"  is  mak- 
ing a  sudden  advance  in  the  broad- 
casting field. 

Facsimile  is  the  process  of  trans- 
mitting pictures,  type  pages,  musical 
scores,  etc.,  by  radio  or  other  elec- 
trical impulses.  Already  widely  used 
for  the  sending  of  news  photos,  over 
both  leased  wires  and  ordinary  tele- 
phone sets,  the  adaptation  of  fac- 
simile by  radio  stations  would  make 


it  possible  to  deliver  complete  tabloid 
newspapers,  with  headlines,  cartoons, 
display  ads,  etc.,  to  every  home  within 
range  of  a  broadcast  station. 

During  the  past  month  or  two  some 
25  U.  S.  broadcast  stations  have 
ordered  facsimile  transmitting  sets, 
for  experimental  use.  Each  purchase 
includes  50  to  100  home  facsimile  re- 
ceivers which  will  be  farmed  out  in 
the  community  for  test. 

While  most  of  these  broadcasters 
plan  to  make  their  facsimile  trans- 
missions on  their  regular  broadcast 
channels  during  the  early-morning 
hours,  when  ordinary  broadcasting  is 
hushed,  a  few  contemplate  24-hour 
short-wave  transmissions.  The  fac- 
simile receivers  being  supplied  are 
complete  with  radio  chassis,  but  fac- 
simile attachments  are  already  on  the 
market  which  can  be  connected  onto 
existing  home  radios  in  place  of  th'j 
loudspeaker. 


TUBE-AMPLIFIED  PIANO 
MAKES  BOW 

*  Several  recent  developments  in- 
dicate that  radio  dealers  may  soon 
have  a  new  form  of  radio-tube  musi- 
cal merchandise  to  sell — the  tube- 
amplified  piano.  (See  Eadio  Today, 
July,  1937,  page  30.) 

Wanamaker's,  New  York,  has  been 
advertising  its  new  Musette  piano, 
employing  "the  resotonic  scale  to 
which  radio  principles  of  amplifica- 
tion have  been  applied.  We  used  this 
amazing  new  instrument  to  help  ac- 
company our  Christmas  community 
singing  and  were  deluged  with  in- 
quiries," explains  the  ad. 

The  new  instrument  sells  for  $695 
and    is    described    as    "diminutive    in 


Radio   leaders   attend   a   white-front   benefit   at   New   York's    Waldorf.     Left   to 
right,  Ben  Abrams  of  Emerson,  David  Sarnoff  of  RCA,  and  Henry   Benjamin. 

10 


Lee  Robinson,  vice-president  and  sales 

manager     of    "Radio    Today,"     greets 

R.  L.  Triplett,  instrument  king. 

size,  but  has  an  enormous  range  in 
tone,  from  beautiful  pianissimo  to 
tremendous  volume.  It  costs  no  more 
than  a  good  grand.  We  believe  that 
orchestra  leaders,  schools,  clubs, 
churches,  and  private  music-lovers 
will  be  extremely  interested  in  it." 

Meanwhile  rumors  are  floating 
around  that  several  leading  radio 
manufacturers  are  considering  mak- 
ing these  amplified  pianos  and  mar- 
keting them  through  their  own  dis- 
tributing organizations.  The  pianos 
would  be  sold  as  separate  instruments, 
or  incorporated  into  expensive  radio 
consoles,  affording  a  combined  master 
musical  instrument  for  fine  homes. 

AS  OTHERS  SEE  US! 

*  We've  just  had  a  fresh  round 
with  the  experts  in  decoration  and 
design  on  this  matter  of  radio  cab- 
inets, and  we  hasten  to  print  with 
the  statement  that  they  won.    If  you 

Radio  Today 


Aerovox  Corp.'s  popular  Charley  Go- 
lenpaul  has  a  smart  hobby — collecting 
positively    all     the    jobbers'     catalogs. 

so  much,  as  mention  radio  cabinets  to 
them,  they  snort.  (Favorite  adjec- 
tives include  atrocious,  unthinkable, 
impossible,   and   God-awful.) 

None  of  them  seemed  to  be  mixed 
up  on  it,  either;  they  know  precisely 
how  to  adapt  authentic  designs,  and 
they  seem  to  agree  on  the  places 
where  the  radio  manufacturers  make 
their  "flashy  blunders." 

Tet  these  artistic  boys  are  quite 
human,  for  all  their  elegant  noticms. 
They  say  that  if  somebody  builds  a 
decent  cabinet,  the  public  will  buy 
it  right  off.  People  won't  be  able  to 
explain  why  they  like  it  but  they  will. 

So  that's  that! 


DEALERS  PRESENT  BRIEF  TO  FTC, 
PLAN  NATIONAL  ASS'N. 

*  A  group  of  dealers  have  actual- 
ly asked  for  lower  discounts.  "We 
get  45  to  60  per  cent  from  the  list 
prices,"  they  say,  "and  we  'regard 
these  discounts  as  unnecessarily  and 
indefensibly  high." 

This  attitude  was  recorded  in  a 
brief  submitted  to  the  Federal  Trade 
Commission  by  William  H.  Ingersoll, 
fair  trade  authority,  representing  the 
radio  and  appliance  dealers'  associa- 
tions of  Manhattan,  Bronx,  Brook- 
lyn and  Queens  boroughs,  New  York 
and  Westchester  County,  New  York. 
These  dealers  had  regarded  the  trade 
regulations  heard  by  FTC  on  Dec.  7 
as  OK  "as  far  as  they  go"  but  sug- 
gested several  additions  in  their  own 
brief  dated  Dec.  13. 

The  extra  wishes  of  these  dealers 
were  listed  under  six  main  heads : 

1.  It  is  the  conviction  of  our  mem- 
bers that  list  prices  of  radio  sets  are 
too  high. 

2.  We  submit  further  that  lower 
prices  to  the  public  will  prevail  if 
trade-in  allowances  are  held  to  sen- 
sible maximums. 

3.  We  hold  that  each  set  should  be 
explicitly  marked  with  sufficient  de- 
scriptive detail  so  that  the  consumer 
could  not  be  deceived  regarding  the 
specifications  of  the  set  he  is  buying. 

4.  We  prefer  to  see  all  sets  marked 
with  the  names  of  the  actual  manu- 
facturers. 

5.  We  are  agreed  with  the  Better 
Business  Bureau  that  the  rules  should 
prohibit  the  advertising  of  radio  sets 
which  are  not  sold  without  special 
equipment,    such    as    antenna,    at    a 


G.   Hamilton   Beasley,  Utah  president, 
has  announced  executive  appointments. 


price  which  does  not  include  the  re- 
quired equipment. 

6.  We  disapprove  of  a  dealer's  tam- 
pering with  sets  to  impair  their  per- 
formance in  demonstrations  before 
customers  for  the  purpose  of  divert- 
ing their  choice  to  some  other  prod- 
uct that  he  prefers  to  sell. 

Under  the  wing  of  the  Brooklyn 
dealers'  association  a  meeting  was 
held  recently  of  officials  from  the 
Home  Appliance  Dealers'  Association, 
Philadelphia,  and  from  a  Southern 
New  Jersey  body.  The  plan  of  a  na- 
tional organization  of  radio  and  ap- 
pliance dealers  was  strengthened. 


RECESSION  TURNS  PUBLIC 
TO  RADIO 

*  "If  the  recession  continues,  and 
money  becomes  scarcer,"  declares 
Philco's  Ernest  B.  Loveman,  "the 
public  will  turn  more  and  more  to 
radio.  A  restricted  family  budget 
means  many  more  nights  spent  at 
home  and  the  finest  radio  entertain- 
ment in  the  world  is  free  to  every  one 
who  owns  a  radio. 

"When  people  have  to  watch  their 
dollars,  they  become  more  and  more 
dependent  upon  the  radio.  This  has 
been  proven  in  the  past  two  months 
by  the  fact  that  theater  attendance 
throughout  the  country  has  dropped 
more  than  20  per  cent  and  that  night 
clubs  everywhere  are  reporting  a  seri- 
ous decline  in  volume.  As  radio  en- 
tertainment becomes  more  and  more 
the  old  standby,  the  public  will  de- 
mand a  great  deal  more  of  their  radio 
sets." 


Indianapolis  Chamber  of  Commerce  honors  Stewart-Warner  on  the  firm's  25th 
birthday.  In  section  at  the  left,  J.  E.  Otis,  Jr.,  SW  president;  J.  S.  Knowlsonr 
board  chairman,  and  H.  F.  Shortemeier.     At  right,  SW's  J.  F.  Ditzell  and  friend. 


January,  1938 


II 


RADIO  BEATS 
A  RECESSION 

How  dealers  are  attracting 
buyers  and  moving  stocks 


•  RADIO  SALES  have  been 
nicked  before,  and  by  experts.  No 
such  a  small-time  "recession"  as  the 
current  one  will  ever  get  radio  men 
to  admit  that  they're  licked. 

When  there  is  a  drag  in  sales, 
most  dealers  decide  to  breeze  out  and 
do  something  about  it.  Accustomed 
to  doing  a  job,  they  pour  in  a  lot  of 
extra  personal  effort  without  hiking 
their  advertising  and  promotional  ex- 
penses to  unsound  limits. 

The  whole  idea  is  to  get  radio 
merchandise  to  the  attention  of  more 
folks,  either  by  getting  them  into  the 
store  or  by  organized  selling  outside. 

It  means  that  dealers  are  more 
careful  today  about  re-checking  pros- 
pect lists,  getting  names  from  the 
service  or  appliance  departments, 
and  making  an  attack  on  all  those 
who  are  known  to  have  outmoded  sets. 

It   also   means   that   letters,   circu- 


lars and  post  cards  for  direct  mail 
must  be  dressed  up  with  a  new  ap- 
peal of  1938,  based  upon  the  fact 
that  people  are  a  little  slow  to  buy 
right  now.  Window  and  store  dis- 
play must  be  re-vamped  in  a  novel 
and  striking  manner,  tied  up  with 
local  newspaper  advertising  written 
as   genuine  radio  merchandise  news. 

Experts  agree  that  you  can't  sit 
around  with  a  dull  look  in  your  eye 
and  blubber  about  how  rotten  busi- 
ness is.  You  can't  turn  out  half  the 
lights  and  let  the  place  get  sloppy. 

Tour  store  must  be  cheerful  and 
trim;  your  own  attitude  must  be 
optimistic  and  aggressive,  is  what 
they're  saying. 

Specifically,  dealers  have  taken  a 
variety  of  steps  to  stir  sales  and  to 
get  under  way  with  resourceful  pro- 
motion in  general.  Following  are 
some  ideas  from  all  parts  of  the  U.  S. 


.OS. 
07. 
.06. 
.OS. 
.04- 
.03. 
.02- 
•  01  . 
0 

MORNING                     NOON 
RUSH                           DAY 
PERIOD                     PERIOD 

HOMEWARD 

RUSH 

PERIOD 

EVENING 

AMUSEMENT 

PERIOD 

.08 
..07 
.06 
..05 
..04 
.03 
.02 
-01 
.  O 

PERIOD  OF 

LOW  VARIATION 

IN  NORMAL 

PEDESTRIAN 

TRAFFIC 

PERIOD  or 

LOW  VARIATION 

IN   NORMAL 

PEDESTRIAN 

TRAFFIC 

A 

i        7 
M. 

8        3       lO       H        11        1        1        3        . 
NOON 

THE    ADVERTISIN 

V        5        * 
PM 

0    OAY 

7        8        9        10 

U        1 
MIDt' 

■L 
IISHT 

How  window  circulation  varies  from  hour  to  hour.     (Chart  by  ANA). 


*  Hopper-Kelly  Co.,  Seattle, 
Wash. — Young  lady  demonstrators 
appear  in  window  displays  and  by 
means  of  a  microphone  and  a  speaker 
outside  the  window,  create  a  "talking 
window"  effect.  The  attractive  girls 
take  up  the  sales  points  of  the  new 
receivers  displayed  and  explain  to  the 
street  traffic  why  1938  sets  are  good 
buys. 

*  Radio  dealers  of  Harrisburg, 
Pa.,  and  local  CBS  station  WHP 
cooperate  in  a  12-page  radio  supple- 
ment in  the  newspaper  Harrisburgh 
Telegraph.  The  stunt  was  engi- 
neered by  WHP's  publicity  director 
Dick  Redmond. 

The  newspaper  feature  carries  in- 
formation about  new  sets,  program 
material  and  general  broadcasting  in- 
formation. Titled  "Drawing  the 
Curtains,"  it  attracts  wide  attention 
to  a  series  of  dealer  ads  placed  in  the 
section. 

*  Matheny's  Radio  Service,  We- 
woka,  Okla. — Hold  a  contest  for  the 
oldest  radio  in  the  community.  The 
owner  is  awarded  a  new  7-tube  table 
model  set.  No  obligations  are  in- 
volved for  entries,  except  that  en- 
trants are  required  to  drop  in  and 
give  the  model  and  serial  number  of 
their  set. 

*  Wm.  Doerflinger  Co.,  La  Crosse, 
Wis. — A  unique  window  display  is 
built  with  38  sets.  In  the  center 
goes  an  arm  chair  with  an  appro- 
priate chairside  model  at  each  side 
of  it.  At  each  side  of  the  chair  dis- 
play consoles  are  used  with  wings  of 


12 


Radio  Today 


shelves  going  full  height;  thus  the 
consoles  are  framed  by  7  table  mod- 
els each.  On  the  floor  in  front  of 
all  this  are  placed  19  table  models 
of  the  smaller  types,  including  plas- 
tics. Color  to  the  rear  is  provided 
in  the  background,  and  color  at  the 
front  is  furnished  by  using  colored 
sets. 


*  Schafer's,  Englewood,  N.  J. — 
Store  salesmen  are  entered  in  weekly 
contests  in  which  points  are  given 
for  new  customers  added  to  the  lists 
of  acquaintances  of  the  firm.  Prizes 
are  limited  to  appropriate  articles  of 
clothing,  and  a  single  competition  is 
never  allowed  to  continue  over  a 
week.  Since  each  award  is  a  strictly 
useful  one,  and  prize  winners  decided 
every  few  days,  interest  is  kept  at  a 
high  pitch. 

*  The  Electrical  Appliance  So- 
ciety of  Northern  California  starts 
the  sponsorship  of  a  big  campaign 
with  over  300  radio  dealers  of  the 
area  based  on  the  idea  of  "You're 
There  in  Person  with  a  1938  High 
Fidelity  Radio."  Sixteen  stations  of 
the  Northern  California  Broadcasting 
System  donate  some  $18,000  worth  of 
time  on  the  air. 

The  drive  includes  space  in  200 
newspapers,  400  theatres,  and  bill- 
board activity,  in  the  interests  of 
better  radio  receivers.  The  keynote 
is  that  dealers  should  "forget  resist- 
ances, loudspeakers,  and  tubes — sell 
symphonies,  comedians  and  drama." 

*  Schwartz  Furniture  Co.,  New 
Brunswick,  N.  J. — A  single-night 
sales  event,  staged  for  invited  guests 
at  an  hour  when  the  store  was  not 
usually    open,    helps    to    tonic    radio 


Advertised  as  something  special  for 
a  selected  group  of  store  friends,  the 
affair  is  registered  on  Schwartz  ac- 
quaintances as  a  courtesy  to  be  ex- 
tended between  7  and  9  p.m.  on  one 
night  only.  Attractive  giveaways 
are  featured  and  the  event  has  the 
nature  of  a  "party"  where  too  much 


At    right,    radio    man    finds    that    his 

display    efforts,    his    telephoning,     his 

careful  advertising,    his   demonstration 

technique,  adds  up  to  a  nice  sale. 


SIX  WAYS  TO  MOVE 

STOCKS 

1. 

Mail     out    special     an- 

nouncements   of   adver- 

tised offers. 

2. 

Contact   customers   who 

bought  sets  several  years 

ago. 

3. 

Telephone    set    owners 

who  recently  had  radios 

repaired. 

4. 

Feature    human    interest 

windows   showing    lines 

on  hand. 

5. 

Display    all     goods    in 

1938    style,    with    new 

descriptive   price   cards. 

6. 

Offer  salespeople  a  plus 

compensation  for  selling 

slow  items. 

serious  sales  talk  was  checked  out  and 
family  groups  relaxed. 

According  to  I.  A.  Kenny,  Schwartz 
executive,  the  stunt  furnishes  a  valu- 
able check-up  on  the  current  buying 
interests  of  all  prospects  and  in  gen- 
eral identified  the  store  with  a  friend- 
ly merchandising  policy. 


*  Bay  Haasch,  Milwaukee,  Wis. — 
A  store  celebration  is  staged,  to  which 
all  former  customers  are  invited. 
''They  do  not  have  to  buy  a  single 
item — merely  make  an  appearance  at 
the  store  and  register.  If  they  are 
fortunate  they  win  one  of  17  prizes. 
These  prizes  are  delivered  to  regis- 
trants even  if  they  are  not  at  the 
si  ore  when  the  prizes  are  awarded. 
The  typical  reaction  to  this  is  seen 
in  the  statement  of  one  guest  who 
said  that  a  store  which  played  square 
like  that  could  have  his  business  any- 
time, and  proceeded  to  send  us  sev- 
eral customers." 


Live    models   are   used   with   Stromberg   chairsides    at   Jenkins    Music 
Tulsa,  Okla. 


Home  demonstrations  are  welcomed  by  typical  families. 

MORE  WAYS  TO 
BEAT  A  SLUMP 


A  salesman  invites  a  prospect  to  outline  all  that  she  wants  in  a  ne\ 

receiver. 


Novel  market  for  auto  radio,  photo-      Servicemen,  with  eye  for  plus  sales,     Neighboring  stores  are  OK  prospects  and  good 
graphed  by  New  Departure  Coaster      take  spare  receiver  along  on  repair     pay;  here,   a   cigar-store   crowd   makes  friends 
Brakes.  jobs.  with  Philco. 


14 


Radio   Today 


NEW  AUTO  RADIO  LINES 

New  models  feature  improved  tuning  and  push-button  control 


•  PUSH-BUTTON  TUNING, 
which  has  been  so  successful  in  home 
radios,  is  now  one  of  auto-radio's  big- 
gest features. 

Introduced  first  by  Chevrolet  last 
November  at  the  N.  Y.  Auto  Show 
and  manufactured  by  Crosley,  push- 
button tuning  for  autos  is  made 
available  to  the  radio  industry  for 
first  time  also  by  Motorola  in  models 
priced   at   $59.95   and  $79.95. 

Sales  up  25% 

Despite  a  substantial  drop  in  auto- 
radio  sales  the  past  two  months, 
Philco's  Transitone  sales  manager.. 
March  Fisher,  states  that  their  sales 
are  up  25  per  cent  over  the  figures 
for  a  year  ago.  _  And  it  is  expected 
that  auto-radio  sales  will  keep  boom- 
ing this  season.  Many  car  owners 
who  have  felt  they  couldn't  buy  a 
new  car  model  this  year,  have  the 
money  to  buy  a  radio  and  are  doing  so. 

Auto  dealers  in  an  effort  to  clear 
a  congested  used-car  market,  are  in- 
stalling auto  radios  to  attract  pros- 
pective purchasers. 

Now  that  the  motor  public  is  get- 
ting accustomed  to  consider  auto 
radios  a  necessity,  the  demand  is  on 
the  increase.  And  then,  too,  the 
radios  themselves  give  much  better 
performance — ignition  and  other  elec- 
trical noises  have  been  eliminated — 
tone  quality  greatly  improved. 

Lower-priced  models 

During  the  first  two  weeks  of  Jan- 
uary new  auto  sets  were  announced 
by  Crosley,  Motorola,  Philco,  and 
RCA.  To  eliminate  remote  con- 
trols, RCA  and  Philco  have  designed 
single-unit  sets  mounting  behind 
the  instrument  panel.  RCA's  8M,  a 
5-tube  superhet,  illustrated  on  this 
page,  lists  for  $19.95.  And  Philco's 
model  920,  a  5-tube  set  with  a  pre- 
selector stage,  lists  at  $24.95.  The 
Roamio  Fiver  made  by  Crosley  is  also 
an  instrument-panel  receiver — it  sells 
for  $19.99. 

In  the  higher-priced  models  im- 
proved tuning  and  reception  controls 
are  featured.  The  Motorola  receivers 
have  a  dial  mechanism  which  features 
"Spot  Tuning."  After  station  set-up, 
a  slight  click  is  felt  while  tuning 
when  the  station  is  accurately  tuned 
in.  As  stated  by  Galvin — one  just 
"feels"  the  correct  position. 

While     auto    radios     will     be     the 


greater  portion  of  the  dealers'  income 
for  the  next  few  months,  motorbcats 
and  yachts  are  sales  opportunities  not 
to  be  overlooked.  Interest  in  boats 
is  at  its  highest  since  1929  as  evi- 
denced by  the  attendance  at  the  N.  Y. 
Motorboat  Show. 

Radios  for  boats 

From  the  entertainment  point  of 
view,  every  pleasure  craft  should  have 
a  radio  set.  For  broadcast  reception 
any  quality  auto  receiver  is  satisfac- 
tory; also  many  of  the  farm  battery 
receivers  will  be  suitable.  Zenith 
manufactures  some  models  especially 
designed  for  selling  to  boat  enthu- 
siasts. Special  shielding  of  the  en- 
gine may  be  necessary — it  depends 
(Continued  on  page  33) 


Motorola's  push-button  tuning  controls. 


RCA  Victor  instrument  panel  controls. 


TUNING  CONTROL 


fi^^^l 

^^Fm\1 

Hrc  \ik 

J»  P     w 

V  u  W 

\m  A  W 

di  k 

9  s   1 

1  v  L 

B&  c     IB 

Be   M 

m.  *  Im 

l!^kJzL^fl 

jBliLJB) 

RECEPTION  CONTROL 


Philco  features   push-button   reception 
control  for  varying  conditions. 


Six  tubes  in   Motorola  8-50  featuring 
spot   tuning    and    acoustinator — $49.95. 


A   pre-selector  and  five  tubes  are  in- 
cluded by  Philco  in  this  set  for  $24.95. 


RCA  model  8M  for  instrument  panel 
mounting  has  5  tubes — lists  for  $19.95. 


Safety  tuning  with  mechanical  push 
buttons  selecting  five  stations  is  fea- 
tured   by    Crosley    for    less    than    $25. 


January,  1938 


15 


FAKE  RADIOS! 

Counterfeit  Sets,  Faked  With  Dummy 

Tubes,  Advertised  and  Sold  By  Some 

New  York  Stores,  Exposed  As  Fraud 

By  Radio  Magazine! 

New  Rochelle  radio  dealers,  mindful  of  the  fact  that 
aom-e  local  residents  have  purchased  one  of  these  "fake*1 
radio  set*  as  advertised  in  New  York  City  publish  the 
asiou  riding  facts  uncovered  by  the  authoritative  magazine 
"Radio  Today,1*  ht  the  hope  that  prospective  radio  pur- 
chasers will  realize  the  value  of  trading  at  home  .  .  with 
a  dealer  who  feelieves  that  fair  and  honest  mercfaandizinsr 
always  pays  dividend*. 

READ  THESE  FACTS 

Reprinted  from  "Radio  Today" 


pr«ys  -on  ihe  fallible  radio 


Flay  Safe,  Purchase  Your  Radio  From 

One  Of  The  Reputable  New  Rochelle 

Radio  Dealers  Listed  Below,  Where 

Yoi  Can  Bay  With  Confidence! 

Librett-NorthA  venue 

Atrtfc«iwwJ  Pndco  Agent? 

North  »t  Wiayah         Open  Evening.         Hamilton  5QS0 

Linden  Furniture  Co.,  Inc. 

Autno*ia*d   Philco  Radio   Daal«r 

607  Main  St.     Open  Evening!  Until  Xmaa     N.  R.  5722 

Goldman  Electric  Co. 

DnW  t  or  Z.ntih  and  Othar  Fonuiar  Make. 

230  North  Avenue  Open  Evening.  N.  R.  2418 

Sterling  Furniture  Co. 

PMlen  R.dto.  and  Otbera 

S92  Main  Street  Phone  N.  R.  t!960 

Westchester  Radio  Co. 

Dealer  in  Ptiijcn,  Genarat  Eiactric  and  Ota.ri. 

434  North  Avenue         Open  Evening,  N.R.8751 

■***  *r  •»**  »«*>»  "*ni  41m  to  tto  Mnri  -j  ■£  r^^^.i  auto  awf%Hoat 


Advertisement  which  radio  dealers  of 
New  Rochelle,  N.  Y.,  ran  on  Dec.  17, 
in  local  "Standard-Star".  Credit  for  the 
move  goes  to  Edward  Lowe,  of  Lowe 
Electrical  Co.,  also  one  of  the  group. 
Legitimate  radio  men  are  thus  willing 
to  pay  for  local  publication  of  "Radio 
Today's"   trade-shaking  facts. 


*  "YOUR  corporation  is  fined 
$500.  Your  salesman  gets  30  days 
in  the  workhouse,  and  you,  as  head 
of  the  firm,  are  sentenced  to  four 
months  in  jail!" 

Thus,  in  effect,  spoke  a  New  York 
court  to  the  most  recent  of  the  radio 
racketeers  to  be  brought  to  justice. 

As  the  "call  to  arms"  sweeps  out- 
ward from  Manhattan  and  through 
the  rest  of  the  nation,  let's  re-examine 
the  elements  of  the  situation  as  the 
radio  business  becomes  decency-con- 
scious all  over  again. 

In  the  field  of  new  receivers  the 
dishonest  merchant  has  three  prin- 
cipal methods  of  plying  his  racket. 
First  comes  the  sale  of  unknown,  un- 
advertised  brands  at  fantastic  retail 
list    prices.      These    sets    not    infre- 


GYPS,  "PULLERS, 
TUBE-BOYS! 


More  tricks  of  metropolitan  grafters,  against 
which    legitimate    radio    men    must   compete 


» 


quently  carry  euphonious  name- 
plates — often  attached  to  the  set  by 
the  gyp  dealer  himself — with  names 
that  bear  striking  resemblance  to  the 
well-advertised,  standard  brands.  Such 
sets  are  being  sold  to  the  gullible  at 
full  "list"  or  at  substantial  cash  dis- 
counts. In  either  case,  the  dealer 
nets  a  handsome  profit.  Very  few  of 
these  receivers  are  up  to  accepted 
engineering  standards;  they  are  usu- 
ally assembled  with  inferior  parts, 
and  usually  contain  a  number  of 
"dummy"  tubes  that  serve  no  useful 
radio  purpose  in  any  of  the  set's  cir- 
cuits. (See  Eadio  Today  for  No- 
vember.) 

"Classy"  cabinets 

Next  in  line  is  the  sale  of  standard- 
brand  midget  receivers  reinstalled  in 
cheap  but  sumptuous-looking  cab- 
inets. The  manufacturer's  distinctive 
escutcheon  and  name  plates  are  at- 
tached to  the  "spiffy"  cabinet  and  the 
buyer  pays  through  the  nose  for  the 
dealer's  own  "new  model"  and-  at  the 
dealer's  own  fantastic  retail  list  price. 

Of  course,  in  the  metropolitan 
areas,  where  the  buying  public  has 
had  a  liberal  education  in  the  devi- 
ous ways  of  the  unprincipled  mer- 
chant, more  subtle  ways  have  to  be 
used  by  the  versatile  "gyp  artist."  In 
such  centers,  at  least,  some  buyers 
"know  too  much"  and  are  shrewd 
enough,  especially  when  buying  for 
cash,  to  drive  a  hard  bargain.  In  such 
cases  the  dealer  is  careful  not  to  in- 
fluence the  buyer's  choice.  Subtle 
suggestion  is  used,  but  no  actual  rec- 
ommendation is  made.  He  does  his 
own  picking — usually  selecting  a  good 
standard  receiver — and  in  so  doing 
literally  "hangs  himself." 

The  transaction  completed,  the 
dealer's  delivery  and  installation 
men,  and  the  so-called  "service"  de- 
partment are  instructed  to  see  to  it 
that  the  receiver  is  not  satisfactory. 
A    poor    installation,     a    couple    of 


•'cluck"  tubes  do  the  trick  very  nicely. 
Not  many  weeks  pass  before  the  dis- 
gruntled customer  reappears  in  the 
dealer's  emporium.  He  is  now  met 
by  a  suave  fellow  of  the  "hail  brother 
— well  met"  school,  who  expresses 
himself  as  being  quite  willing  to  ex- 
change the  unsatisfactory  machine 
for  a  different  make  or  model,  but 
this  time  at  the  dealer's  own  cash 
terms.  Needless  to  say,  the  dealer 
manages  to  make  the  exchange  a 
lucrative  proposition  for  himself. 

As  for  minor  infractions  against 
the  most  elementary  honest  business 
practices — and  these  are  legion — we 
shall  mention  only  a  few. 

Small-time 

There  is  the  "service"  promised,  but 
never  rendered;  the  sale  of  older  sets 
as  "the  very  latest  current  models"; 
the  sale  of  used,  repossessed,  and 
trade-in  sets  as  "demonstration"  or 
"floor"  models;  and  the  substitution 
of  cheap  tubes  in  standard  receivers 
at  a  gain  of  two  to  five  dollars  to  the 
enterprising,  if  not  too  honest,  dealer. 

And  while  on  the  subject  of  tubes : 
From  the  very  beginning  of  the  radio 
industry  racketeering  in  tubes  has 
been  a  remunerative  endeavor.  Used, 
rejuvenated,  and  misbranded  tubes 
for  many  years  flooded  the  market. 
To  eradicate  some  of  these  malprac- 
tices and  to  protect  the  consumer,  the 
leading  tube  manufacturers  finally 
designed  a  "sealed  carton"  package 
so  that  at  least  now  one  may  be  rea- 
sonably sure  of  getting  new  tubes  for 
one's  money. 

But  the  day  of  the  tube  gyp  is  not 
over,  ilany  chain  stores  and  indi- 
vidual stores  in  shopping  centers  still 
employ  so-called  "tube  boys."  These 
are  hired  to  test  and  sell  tubes.  They 
are  paid  a  very  small  salary  and  a 
commission  of  five  cents  for  each  tube, 
but  only  if  sold  in  quantities  of  three 
or  more.  What  an  incentive  for  dis- 
honest tube  testing  and  selling! 


16 


Radio   Today 


It  is  the  neighborhood  gyp  dealer, 
however,  who  has  developed  the 
subtlest  tube  scheme  of  them  all.  This 
master  of  applied,  if  not  too  honest, 
psychology  will  test  the  customer's 
tubes  and,  even  if  one  or  more  of 
them  are  sufficiently  bad  to  stop  or 
at  least  substantially  affect  reception, 
will  tell  him  blandly  that  his  tubes 
are  all  right.  And,  while  he  thinks: 
"Here,  at  last,  is  an  honest  dealer" — 
this  master  of  deception  gently  purrs : 
"The  trouble  more  than  likely  is  in 
your  radio.  I'll  send  my  mechanic 
over  and  he  will  put  it  in  shape  for 
you.  .  .  ."  It  doesn't  always  work  out 
the  way  the  dealer  anticipates;  but 
when  it  does,  it  pays — handsomely! 


Service  that  smells 

And  so  we  come  to  the  service  and 
repair  racket.  To  begin  with,  the 
dealer  who  both  repairs  and  sells 
radios  is  not  always  particularly 
anxious  to  satisfy  the  customer  with 
his  workmanship.  If  the  job  is  not 
entirely  satisfactory,  he  puts  on  his 
best  ingratiating  manner  and  pro- 
ceeds to  sell  the  customer  a  new  radio. 
"We'll  give  you  an  excellent  allow- 
ance on  your  old  machine ;  after  all, 
we  want  our  customers  to  be  satis- 
fied." In  the  sales  end  of  radio  one 
is  at  least  subconsciously  aware  that 
the  dictum  of  caveat  emptor  holds 
sway. 

What  some  radio  service  racketeers 
lack  in  age  and  experience  they  more 
than  make  up  in  ingenuity.  They  are 
early  taught  by  their  employers  or 
by  other  men  in  the  business  that  the 
thing  that  makes  a  serviceman  valu- 
able is  his  ability  to  "pull"  sets  from 
the  customer's  house.  Never  mind 
what  the  trouble  is,  show  them  your 
pretty  test  meters,  give  them  a  spiel, 
sell  them  a  "bill  of  goods" ;  but,  what- 
ever you  do,  pull  that  set !  It  is  the 
puller  who  brings  home  the  "bacon." 

Further  tricks 

Needless  to  say,  the  really  expert 
radio  man  is  more  often  than  not  a 
very  poor  "puller."  He  is,  therefore, 
usually  kept  on  the  inside  to  "work 
behind  the  bench,"  and  the  "blarney 
artist,"  who  knows  little  more  than 
his  pretty  speech,  is  sent  to  the  cus- 
tomer's house  with  instructions  to 
"get  that  set."  A  "free  service"  or 
"50e  service"  sign  or  ad  gets  hirn  into 
the  customer's  home.  Once  there,  he 
is  trained   to   get   all   the   traffic  will 

Counterfeit  "1938-model  radios"  are 
home-made  by  the  gyp  dealer,  using 
an  aeroplane  dial,  new  cabinet,  and 
ancient  chassis,  maybe  four  or  six 
years  old. 


bear.  And,  just  as  often  as  not,  all 
the  customer  gets  for  his  money  is 
a  fuse  (price  five  cents),  a  resistor 
(price  ten  cents),  a  condenser  (aver- 
age price  twenty-five  cents),  or  a  tube 
(price  one  dollar  or  less). 

Suppose  you  discover  that  the  fuse 
in  your  radio  is  burned  out.  The  gyp 
is  not  at  all  discouraged.  On  the 
contrary,  he  expresses  admiration  at 
your  being  able  to  locate  the  trouble 
for  yourself.  And  sells  you  a  new 
fuse  of  about  one-quarter  of  the  re- 
quired amperage.  Unable  to  carry 
the  load,  such  a  fuse  burns  out  the 
instant  the  radio  is  switched  on,  and 
then,  baffled  by  this,  there  is  a  good 
chance  that  you  may  yet  call  on  this 
gyp  to  "put  your  radio  in  good  work- 
ing order." 

The  .  tuning  dial  is  usually  secured 
to  the  tuning  mechanism  by  means 
of  "set  screws."  When  these  get  loose 
the  dial  turns  without  actuating  the 
tuning  mechanism  so  that  one  either 
gets  one  station   all  over  the  dial  or 


gets  no  stations  at  all.  Tightening 
the  set  screws  repairs  the  set,  but  the 
racketeering  serviceman  will  sell  you 
a  set  of  "new  tuning  condensers" — 
at  a  price. 

The  gyp  serviceman,  whether  he 
works  for  himself  or  for  a  storekeeper, 
is  full  of  tricks.  He  will-  cut  down, 
ground  or  short  your  aerial  and  then 
solicit  your  work.  He  will  "wash" 
tubes  and  tell  you  they  are  new.  He 
will  make  you  pay  for  tubes  he  never 
installed.  He  will  sell  you  tube  sav- 
ers, static  filters,  aerial  eliminators, 
and  similar  useless  truck.  And  he 
will  use  inferior  material. 

He  will  even  stoop  to  vandalism 
and  clip  a  wire  or  two  to  make  sure 
that  the  set  is  inoperative  when  he 
leaves  your  house.  Truly,  he  trods 
rough-shod  to  garner  his  ill  gained 
dollars,  and  his  only  fear  is  that  he 
may  some  day  leave  definite  evidence 
by  means  of  which  an  honest  radio 
technician  may  expose  him ! 


TODAY'S  PROMOTIONS 


HARD-BOILED  SUGGESTIONS 
FOR  NEXT  FEW  WEEKS 

Use  bulletins,  pictures  and  short  no- 
tices to  stir  up  listener  interest  in  the 
Jim  Braddock-Tommy  Farr  heavy- 
weight battle  on  Jan.  21.  Collect  data 
on  the  significance  of  the  bout,  as 
well  as  presenting  complete  reasons 
for  tube  check-ups  and  personal  re- 
ceivers. See  that  your  area  knows  the 
broadcast  time  and  station. 

Leave  new  sets  in  homes  whose  ra- 
dios are  being  repaired.  Choose  re- 
ceivers which  will  contrast  strikingly 
with  the  old  ones,  in  respect  to  ap- 
pearance, tuning  conveniences  and  re- 
production. Install  the  radio  so  that 
it  has  the  best  chance  to  become  an 
indispensable  item  of  furniture  and 
entertainment. 

Display  a  new  console  just  outside 
the  front  door  of  your  shop,  when 
weather  permits.  Select  a  hot  1938 
feature  to  plug  on  a  placard  to  be 
placed  atop  the  instrument.   Tune  the 


radio  in  on  a  musical  program,  or 
play  records  through  the  set.  Face 
the  console  in  the  direction  confront- 
ing the  main  stream  of  street  traffic. 

Build  a  window  in  which  sound 
equipment  is  mixed  up  with  your  ra- 
dio displays.  Go  heavy  on  the  use  of 
microphones  and  the  items  of  public 
address  which  are  most  popularly 
identified  with  the  processes  of  broad- 
casting yet  arrange  the  set-up  to  in- 
terest sound  prospects. 

Distribute  a  circular  with  deliber- 
ate mistakes  made  in  the  copy.  Make 
special  offers  to  those  who  will  bring 
in  the  corrected  sheets,  on  combina- 
tion specials  or  on  trade-in  allow- 
ances. Sample  mistakes :  "Konsoles," 
"orders  filed,"  etc. 

Go  after  business  men  who  have  a 
tendency  to  feel  that  most  broadcasts 
are  not  hard-boiled  enough.  Remind 
them,  for  instance,  that  during  a  cur- 
rent week  CBS  presents,  for  their 
special  benefit,  (1)  industrial  studies, 
(2)  trade  convention  reports,  (3)  re- 
ports on  unemployment,    (4)    surveys 


DEALERS  WHO  HAD  A  HAND  IN  THIS  MONTH'S  LIST  OF  SALES  IDEAS 


E.  H.  Hasse's  radio  and  electrical 
store  of  Englewood,  New  Jersey. 


Gerald   Evans, 
Ola,  Arkansas. 


Frank     K.     Loomis     of 
Westwood,  New  Jersey. 


EIGHT  WAYS  TO 

ATTRACT  BUYERS 

1. 

Advertise  special  values 

and  combination  offers. 

2. 

Telephone  old  custom- 

ers;   give    them    a    new 

reason  to  visit  the  store. 

3. 

Keep  your  window  dis- 

plays  seasonal,    newsy, 

eye  catching. 

4. 

See  that  your  store  front 

is     striking     enough    to 

flag     the     attention     of 

motorists. 

5. 

Invite  local  clubs  in  (or 

programs    of    particular 

radio       broadcast       or 

records. 

6. 

Call   up  service  depart- 

ment    customers,     give 

them    broadcasts    news, 

ask  them  in. 

7. 

Use   streamlined    letters 

and  lively  post  cards  on 

your  prospect  list. 

8. 

Plan  your  store  appeal 

so    that    all    advertising 

and    promotion    is   tied 

up     to     window     and 

counter  displays. 

Paul     L.     Kemper,     The     Gas    & 
Electric      Shop,      Dayton,      Ohio. 


W.  Rosenberg 
Pioneer  Radio 
Wichita,  Kan. 


J.  G.  Bradburn  of  "LiT 
Pal"  radio  store,  Hous- 
ton, Texas. 


of  business  conditions,  (5)  labor  dis- 
cussions, (6)  Congressional  news 
from  Washington,  (7)  tax  discussions, 
(8)  research  reports,  and  (9)  political 
developments. 

Try  a  splash  of  promotion  on  the 
Arturo  Toscanini  broadcasts  at  10 
P.M.  (E.S.T.)  on  Saturday  nights. 
Parts  of  the  stunt  can  be  store  con- 
certs, displays  of  records  with  chair- 
side  models,  actual  photographs  of  the 
conductor  and  the  symphony,  the  use 
of  newspaper  reviews  on  the  concerts, 
and  persistent  advertising  of  the  NBC 
stations  and  the  time. 

Start  to  make  an  event  out  of  the 
fight,  Feb.  23,  between  Joe  Louis  and 
Nathan  Mann.  Follow  the  sports  pages 
in  local  newspapers,  and  use  a  promo- 
tion style  similar  to  the  one  developed 
on  the  Braddock-Farr  brawl,  with 
added  emphasis  on  the  fact  that  Joe 
Louis  is  the  world's  champ. 

Accent  the  gift  angle  as  Valen- 
tine Day  approaches  (Feb.  14).  Drag 
out  an  extra  supply  of  plastic  models, 
colored  sets  and  pee-wee  styles.  Try 
out  the  appeal  of  personal  initials. 


18 


Radio   Today 


RETAILING 
RECORDS 


PLAYING  RECORDS 
THRU  RADIOS 

*  Splashed  across  the  record  news 
this  month  is  the  matter  of  the  disc- 
playing  instruments  which  can  be 
hooked  to  radios.  The  merchandisers 
of  records  are  busier  than  ever  and 
greater  sections  of  the  public  are  in- 
terested in  recorded  music.  And  the 
fans  have  discovered  that  one  of  the 
simplest  and  cheapest  ways  to  hear 
their  favorite  platters  is  to  buy  an 
instrument  which  plays  through  theii 
home  radio  receivers. 

Kecently,  in  radio  advertising  in 
newspapers,  there  has  been  a  definite 
trend  among  dealers  to  offer  these 
instruments  in  special  combination 
offers  with  new  radios.  The  public 
is  being  convinced  that  these  new 
record-players  are  efficient  and  hand- 
some— interesting,  popular-priced  and 
important  additions  to  the  home 
scene. 

At  the  moment,  there  are  five  man- 
utacturers  going  to  town  with  these 
instruments:  Ansley,  RCA,  Eecoton, 
Sonora  and  Stromberg-Carlson.  The 
players  are  furnished  in  AC  or  in 
AC-DC  models,  and  range  in  price 
from  $19.95  to  $55. 

COLLEGE  SPEAKERS  CLASH 
VIA  WAX 

*  Another  use  for  transcriptions 
and  for  recording  equipment  is  found 
in  news  from  California.  Two  col- 
lege debate  teams  decided  to  hold 
their  contest  through  an  exchange  of 
recordings — both  sides  of  the  colle- 
giate debate  question  were  recorded 
on  discs,  and  rebuttals  were  later 
transcribed. 

College  of  the  Pacific,  Stockton, 
Calif.,  and  the  University  of  Kedlands 
were  the  teams  involved  in  the  unique 
clash.  Both  of  these  institutions  are 
using  professional  recording  machines 
supplied  by  Universal  Microphone 
Co.,  Inglewood,  Calif. 


College  students  are  a  cinch  for  new  record  titles;  here,  it's  listening  via  Ansley. 


WAX  WORTH  WATCHING 

CONNIE  BOSWELL  singing  Outside  of  Paradise, 
from  the  Republic  reproduction  of  the  same  name,  and 
You  Took  the  Words  Right  Out  of  My  Heart,  from 
the  Paramount  film,  "Big  Broadcast  of  1938,"  with 
Harry  Sosnick  and  his  orchestra — Deeca  1568. 

RUDY  VALLEE  and  his  Connecticut  Yankees  playing 
The  One  I  Love  and  Melody  Farm,  both  from  the  MGM 
film,  "Everybody  Sing."  Vocal  refrain  by  Vallee — 
Bluebird  B7342. 

RICHARD  HIMBER  and  his  Essex  House  orchestra 
playing  Thrill  of  a  Lifetime  from  the  Paramount  film 
of  the  same  name,  and  I  Live  the  Life  I  Love.  Both 
have  vocal  refrain  by   Stuart  Allen — Victor   25742. 

FREDDIE  FISHER  and  Ms  orchestra  playing  Listen 
to  the  Mocking  Bird  and  Washboard  Man,  with  vocal 
chorus — Decca    2537. 

BENNY  GOODMAN  and  his  orchestra  playing  Life 
Goes  to  a  Party  and  If  Dreams  Come  True — Victor 
25726. 

DICK  POWELL  singing  You  Can't  Stop  Me  From 
Dreamin'  and  Roses  in  December,  from  the  RKO 
picture  "Life  of  the  Party,"  both  with  Harry  Sosnik 
and  his  orchestra — Decca  1543. 

GUY  LOMBARDO  and  his  Royal  Canadians  play- 
ing Ten  Pretty  Girls,  with  vocal  refrain  by  male 
trio,  and  When  the  Organ  Played  Oh  Promise  Me, 
with  vocal  refrain  by  Carmen  Lombardo — Victor 
25702. 

DOROTHY  LAMOUR  singing  True  Confession, 
from    the    picture    of   the   same   name   and   The    Moon 


Kate  Smith  has  just  made  a  new  rec- 
ord, "Bei  Mir  Bist  Du  Shon",  for  Vic- 
tor, with  "Gold  Mine"  on  the  other  side. 


of  Manakoora,  from  the  film  "The  Hurricane,"  both 
with  orchestra  under  the  direction  of  Cy  Feuer — 
Brunswick   8027. 

ROY  SMECK  and  his  Serenaders  playing  You're  a 
Sweetheart  from  the  Universal  production  of  the 
same  name,  and  You  Took  the  Words  Right  Out  of 
My  Heart  from  the  Paramount  movie,  "Big  Broad- 
cast of  1938/'  both  with  VC  by  Donald  King — 
Decca    1571. 

BELLE  BAKER  singing  Bei  Mir  Bist  Du  Scnon  and 
You're  a  Sweetheart  with  orchestra  under  the 
direction    of    Gene    Kardos — Brunswick    8042. 


U.S.  RADIO  FAVORITES 

*  Eadio  listeners  have  voted  all 
over  again  for  their  favorite  air  stars. 
Three  new  national  polls  have  been 
finished,  with  NBC's  Charlie  Mc- 
Carthy and  Jack  Benny  definitely  the 
tops. 

But  first  is  the  survey  made  by  the 
magazine  Fortune,  based  on  inter- 
views among  5,000  representative  men 
and  women.  They  were  asked  about 
favorite  pastimes — "listening  to  the 
radio"'  came  out  first,  ahead  of  going 
to  the  movies  or  reading  magazines 
and  newspapers. 

In  this  survey,  radio  personalities 
were  ranked  thus :  Jack  Benny,  Boake 
Carter,  Lowell  Thomas,  Eddie  Can- 
tor, Bing  Crosby,  etc. 

The  New  York  Daily  News  con- 
ducted a  poll  in  39  key  cities,  and 
found  the  winners  to  be :  Charlie 
McCarthy  (and  Edgar  Bergen),  Jack 
Benny  (and  Mary  Livingstone),  Bing 
Crosby,  Don  Ameche,  Eddie  Cantor, 
etc.  The  first  four  of  these  winners 
are  on  NBC  nets,  the  next  two  on 
CBS. 

In  another  voting,  sponsored  by 
Radio  Daily,  among  radio  editors  and 
critics  radio  personalities  were  ranked 
thus  in  favor:  Jack  Benny,  Edgar 
Bergen-Charlie  McCarthy,  Fred  Allen, 
Bing  Crosby,  Nelson  Eddy,  etc. 


January,  1938 


19 


NEW  THINGS 

Latest  news  of  radio  products  from  the  manufacturers 


Admiral  sets 

+  De  luxe  6  tube  table  model 
with  6  button  motor-drive  tuning. 
AC  super  with  two  tone  walnut  cab- 
inet, 2  bands  American  and  for- 
eign. 6  inch  dynamic  speaker,  AVC, 
tone  control  and  wave  trap.  Sells 
for   $39.95. 

Model  102-6B— 6  tube  superhet,  2 
bands,  6  inch  dynamic  speaker  in 
laydown  type  cabinet,  equipped 
with  6  button  automatic  tuner. 
Priced  at  $29.95.  Continental  Radio 
&  Television  Corp.,  Chicago,  111. — 
Radio  Today — see  also  advt.  cover  III. 


Ohmite  rheostat  dials 

*  Dial  plates  for  Ohmite  vitre- 
ous enameled  rheostats.  A  large  5% 
inch  size  for  Model  N,  R  and  U— 
smaller  2-%,.  inch  size  for  Models 
H,  J,  K  and  L.  Plates  are  brass 
and  etched  black.  Dials  are  cali- 
brated numerically  and  read  di- 
rectly in  percentages  of  resistance 
in  the  circuit.  Ohmite  Mfg.  Co.. 
Chicago,  III. — Radio  Today. 


Center-tap  resistor 

*  Wire-wound  center-tapped  re- 
sistors having  molded  bakelite  in- 
sulation. Metal  strip  across  the 
top  extended  at  ends  serves  as 
mounting  bracket  and  assists  in 
rapid  heat  dissipation.  Unit  will 
handle  5  watts  when  bolted  to  chas- 
sis— 2%  watts  in  open  air.  10  to 
200  ohms.  Type  MW-2J.  Interna- 
tional Resistance  Co.,  401  N.  Broad 
St.,  Philadelphia,  Pa. — Radio  Today 
— see  also  advt.  page  51. 


Tobe  weatherproof  filterette 

*  Weatherproof  noise  filter  unit 
for  outdoor  installation  on  police 
call  relays.  Eliminates  noise  occur- 
ring from  flashing  lights  used  in 
police  recall  systems.  Unit  is  con- 
tained in  weatherproof,  cast  iron 
housing  for  installation  in  the  out- 
door conduit  system  and  comprises 
the  correct  values  of  inductance 
and  capacity  to  prevent  the  feed- 
back of  interference  to  the  electric 
power  supply  line  or  its  distribu- 
tion along  the  wiring  between  the 
relay  and  the  call  lamp.  Tobe 
Deutschmann  Corp.,  Canton,  Mass. 
— Radio  Today-. 


Push  button  table  radio 

*  AC-DC  five  tube  superhetero- 
dyne set  with  trimmer  type  push 
button  tuning.  Speaker  and  audio 
network  are  corrected  for  the  cav- 
ity resonance  occurring  at  about 
1100  cycles.  Has  variable  tone  con- 
trol and  drift  due  to  temperature 
rise  is  less  than  2,000  cycles.  Cab- 
inet is  protected  from  heat  dissi- 
pated within  the  chassis  by  means 
of  asbestos  insulators.  Wilcox-Gay 
Corp.,  Charlotte,  Mich! — Radio  To- 
day. 


Wave-change   switch 

+  Features  of  switch  are  double- 
wipe  contact  that  gives  positive 
contact  with  uniformly  low  resist- 
ance, staggering  of  clips  permits 
mounting  up  to  twenty-four  clips 
on  one  stator — all  insulated  from 
each  other.  Elevated  rotor  contact 
substantially  reduces  the  capacity 
between  contacts  —  contacts  rigidly 
held  in  place,  cannot  work  loose. 
Centralab,  900  E.  Keefe  Ave.,  Mil- 
waukee, Wis. — Radio  Today — see 
also  advt.  page  44. 


Combination   tester 

+  Tester  combines  a  complete 
tube  checker  with  a  wide  range  set 
analyzer.  The  tube  tester  section 
is  of  the  dynamic  mutual  conduct- 
ance type.  Analyzer  section  has  a 
built-in  multi-selector  with  a  com- 
plete set  of  leads  and  adapters  for 
socket  analysis.  Batteries  operate 
all  except  the  highest  range  of 
ohms  and  capacity  meter,  which 
operate  from  built-in  power  supply. 
Hickok  Electrical  Instrument  Co., 
10614  Dupont  Ave.,  Cleveland,  Ohio 
— Radio  Today. 


Celotex  horn 

+  Wide  angle  celotex  horn  with 
external  framework  of  steel.  Bass 
response  superior  to  aluminum  type 
horns,  has  less  feed  back.  Made  for 
12  inch  speakers,  finished  in 
weatherproof  aluminum  paint.  Di- 
mensions 24"  long,  hell  22"x22", 
neck  12"  x  12".  For  use  indoors, 
where  feed  back  is  excessive.  Radio 
Amplifier  Lab.,  59  Walker  St.,  New 
York,  N.  Y. — Radio  Today. 


25    watt   amplifier 

■*•  Operadio  presents  new  25 
watt  P. A.  system,  incorporating 
beam  power  tubes,  electronically 
mixes  one  mike  and  one  phono- 
graph. Uses  latest  dual  diaphragm 
crystal  mike  of  the  hand  type,  but 
also  can  be  used  with  velocity,  vel- 
otron  or  high  impedance  dynamic 
microphones.  Employs  two  perma- 
nent magnet  12"  speakers,  inter- 
changeable power  packs  for  6  volts 
DC  and  110  volts  AC.  "Economizer" 
control  for  battery  supply,  heavy 
duty  type  generator  and  can  be 
used  in  conjunction  with  radio  set 
by  using  model  A-3960  radio  match- 
ing unit.  Operadio  Mfg.  Co.,  St. 
Charles,  111. — Radio  Today'. 


20 


Radio  Today 


\f 


»e*>»? 


1* 


'V 


...; 


ELECTRIC 
TUNING 

$8995 


Here's  a  brand-new  instrument, 
with  radio's  greatest  selling  fea- 
ture, at  a  price  so  low  you'll  work 
overtime  keeping  up  with  sales! 

• 

IN  ORDER  TO  SEND  MORE  PROSPECTS  FOR  THIS  SENSA- 
TIONAL NEW  RADIO  INTO  YOUR  STORE,  RCA  VICTOR  WILL 

1  Feature  Model  87K1  with  strong  sell- 
ing commercials  on  all  "Magic  Key" 
programs. 

2  Run  sales-making  advertising  in  such 
consumer  magazines  as  SATURDAY 
EVENING  POST,  LIFE  and  COLLIER'S. 

3  Tell  the  public  the  amazing  news  about 
the  87K1  with  commercial  announce- 
ments on  81  stations  immediately  fol- 
lowing Metropolitan  Opera  broadcasts. 

4  Smash  home  the  story  in  a  carefully 
planned  newspaper  campaign. 

Hurry  and  place  your  order— the 
demand  for  this  new  model  is  going 
to  be  terrific!  Put  it  right  out  where 
people  can  see  it  —  and  watch  your 
cash  register  fill  up  with  profits! 

RCA  presents  the  '  'Magic  Key ' '  every  Sunday, 
2  to  5  p.  m.,  E.S.T.,  on  NBC  Blue  Network 


RCA  MANUFACTURING  CO.,  INC.,  Camden,  N.  J.  •  A  Service  of  the  Radio  Corporation  of  America 


OVER  300  MILLION 


RCA  RADIO  TUBES  HAVE  BEEN  BOUGHT  BY  RADIO  USERS. ..IN 
TUBES,  AS  IN  RADIO  SETS,  IT  PAYS  TO  GO  RCA  ALL  THE  WAYI 


January,  1938 


21 


NEW  THINGS -Cont'd 


AUTO 
ANTENNAS 


RCA  auto  antennas 

*  Five  new  models  of  auto  anten- 
nas are  now  made  available  by  RCA. 
Monogram  antenna  is  car-top  type, 
but  requires  no  holes  bored  in  top. 
Has  adjustable  telescopic  cowl  bar 
which  will  fit  any  type  car.  Other 
models  are  the  Cowltenna,  Model 
No.  9825,  and  is  permanently  in- 
stalled to  the  side  of  the  cowl,  Rod- 
tenna  goes  on  the  door  hinge,  pin 
is  taken  out  and  antenna  put  on 
and  door  hinge  pin  is  replaced. 
The  Dipole  antenna  is  for  under-car 
Installation.  R.C.A.  Mfg.  Co.,  Cam- 
den, N.  J. — Radio  Today — see  also 
advt.  page  21. 


Turret-tube  oscilloscopes 

*  Oscilloscopes  with  two-inch 
and  three-inch  screens,  both  incor- 
porating Triplett  turret-tube  mount- 
ing feature.  Tube  mounting  permits 
easy  adjustment  of  the  tube  up  or 
down  or  to  either  side,  so  that  the 
screen  is  always  in  direct  view  of 
the  operator.  Furnished  either  in 
DeLuxe  leatherette  or  metal  with 
black  wrinkle  finish.  Triplett  Elec- 
trical Instrument  Co.,  Bluffton,  Ohio 
—  Radio  Today  —  see  also  advt. 
page  55. 


Ward  streamline  antennas 

*  Made  of  natural  white  metal 
that  will  not  rust.  Require  no  drill- 
ing in  the  tip,  nor  the  removal  of 
headlinings  when  installed.  Models 
available  are  the  Quinlan  stream- 
lined side  cowl  aerial  and  the 
Statesman,  a  top  antenna.  Both 
are  telescopic  and  fit  all  cars.  Ward 
Products  Corp.,  1523  East  45th  St.. 
Cleveland,  Ohio  —  Radio  Today  — 
see  also  advt.  page  56. 


Pacific  automatic  tuner 

■*•  Automatic  tuner  for  any 
superheterodyne  can  be  connected 
by  three  wires  to  any  set  without 
automatic  tuning.  Tuner  simple  in 
construction  and  easy  to  install. 
No  special  knowledge  needed.  Full 
instruction  given  with  each  tuner. 
Has  six  station  buttons  and  one 
disconnect  button.  Pacific  Radio 
Corp.,  844  West  Adams  St.,  Chicago, 
111.— Radio  Today. 


Record  changer 

*  Record  changer  will  play 
either  eight  10"  or  eight  12"  rec- 
ords. Features  are  as  soon  as  the  last 
record  is  played  the  changer  auto- 
matically stops  and  switches  off  the 
current.  Desired  record  may  be 
repeated  by  turning  knob  to  repeat 
position;  records  may  be  rejected 
by  turning  knob  to  reject  posi- 
tion. Interference  with  radio  am- 
plification has  been  eliminated. 
Model  R.C.1A  for  100/130  volts  or 
200/250  volts  25/60  cycles.  Also 
universal  model  R.C.2A  for  AC  or 
DC.  Garrard  Sales  Corp.,  17  War- 
ren St.,  New  York,  N.  Y. — Radio 
Today. 


Weston  decibel  meter 

*  A  rectifier-type  power  level  in- 
dicator and  voltmeter,  in  which  a 
new  circuit  network  provides  im- 
proved uniformity  of  operating  char- 
acteristics. Model  695  Type  11  has  a 
constant  internal  resistance  of  20.000 
ohms,  both  into  the  instrument  from 
the  line  under  test,  and  from  the  in- 
strument into  the  network  toward 
the  line.  Meter  has  two  voltage 
scales,  one  each  for  the  two  and  five 
volt  full-scale  ranges  and  multiples 
thereof,  to  facilitate  readings  on  the 
various  voltage  ranges.  Weston  In- 
strument Corp.,  Newark,  N.  J. — 
Radio  Today — see  also  advt.  page  35. 


Bullet  mike 

*  Dynamic  microphone  housed 
In  a  "microscope  finish"  black  metal 
case  of  bullet  shape.  3"  overall 
length,  2"  in  diameter,  available  in 
low  impedance,  approximately  200 
ohms,  or  high  impedance,  about 
50,000  ohms.  Sensitivity — 55  db. 
Supplied  with  cable  connector  and 
lists  at  $19.50,  model  MK-20.  Trans- 
ducer Corp.,  30  Rockefeller  Plaza, 
New  York,  N.  Y. — Radio  Today — see 
also  advt.  page  58. 


Radio  slide  rule 

+  New  radio  slide  rule  for  radio 
engineers,  designers,  amateurs  and 
advanced  servicemen.  Available  at 
a  cost  of  $3  to  members  of  the  radio 
industry,  students  and  experiment- 
ers. Purposes  of  the  rule  are  to 
permit  the  rapid  termination  of  (1) 
capacitative  reactance  when  capac- 
ity and  frequency  are  known.  (2) 
Inductive  reactance  when  induct- 
ance and  frequency  are  known  and 
(3)  Resonant  frequency  when  ca- 
pacity and  inductance  are  known. 
The  determination  of  the  unknown 
quantity,  when  any  two  of  the  three 
quantities  are  known,  may  be  read- 
ily accomplished.  National  Union 
Radio  Corp.,  570  Lexington  Ave., 
New  York,  N.  Y. — Radio  Today — 
see  also  advt.  page  45. 


Electronic   time-ometer 

*  Time-ometer  designed  for  ac- 
curately recording  the  operating 
time  of  electric  refrigerators,  air 
conditioners,  oil  burners  and  similar 
equipment,  may  be  used  by  refrig- 
erator dealers  and  service  compa- 
nies for  demonstrating  to  customers 
the  exact  period  of  operation  of  the 
refrigerator  or  other  electrical  de- 
vice during  any  three  or  four  days 
of  operation.  Net — ?15.  Electronic 
Laboratories,  Inc.,  Indianapolis, 
Ind. — Radio  Today. 


22 


Radio  Today 


PIONEER  OF  THE  AIR 


FOUNDED  IN  1919,  the  Radio  Corpora- 
tion of  America  has  completed  18  years 
of  pioneering  effort  to  develop  and  improve 
the  uses  of  radio. 

Starting  "from  scratch,"  RCA  has  created 
a  world-wide  communications  system  with 
direct  circuits  between  the  United  States  and 
42  foreign  countries,  and  with  ships  at  sea.  It 
has  created  a  nation-wide  broadcasting  sys- 
tem of  endless  cultural  possibilities,  now 
rapidly  expanding  its  services  by  short-wave 
to  all  the  world.  It  has  created  essential  instru- 
ments for  the  radio  transmission  and  recep- 
tion of  sound,  of  code  messages,  and  of  fac- 
simile reproductions,  and  for  the  recording 
and  reproduction  of  sound  on  records  and  on 


motion  picture  film.  It  has  created  countless 
radio  devicesindispensable  to  modern  science, 
industry,  medicine,  telephony,  and  public 
safety.  It  has  created  the  basis  for  a  system 
of  electronic  television,  forecasting  the  day 
when  radio  sight,  added  to  sound,  will  per- 
form a  useful  public  service. 

Today  the  Radio  Corporation  of  America 
is  owned  by  nearly  a  quarter  of  a  million 
stockholders  in  48  states.  No  one  person  owns 
as  much  as  V2  of  1  %  of  its  stock.  Achievements 
of  the  past  18  years  are  a  tribute  to  the  Ameri- 
can tradition  of  service  in  the  public  interest 
through  private  initiative  and  ownership. 

R  CA  presents  the     Magic  Key ' '  every  Sunday, 
2  to  3  P.  M. ,  E.  S.  T. ,  on  NBC  Blue  Network. 


RADIO  CORPORATION  OF  AMERICA 

RADIO  CITY  •   NEW  YORK,  U.  S.  A. 

NATIONAL  BROADCASTING  COMPANY  •  RCA  MANUFACTURING  COMPANY,  INC. 

RCA  COMMUNICATIONS,  INC.   •   RCA  INSTITUTES,  INC.    •   RADIOMARINE  CORP.  OF  AMERICA 

January,  1938  23 


NEW  THINGS  —  Cont'd 


Emerson  receivers 


■*■  Seven-tube  two-band  receiver 
with  trimmer  push-button  tuning, 
magic  eye,  straight  line  dial  and 
metal  tubes.  Console  cabinet — two 
bands,  530-1720  and  2300-22,000  KC, 
covering  domestic  and  foreign 
broadcast.  Has  4.5  watts  output, 
12"  dynamic  speaker,  20  to  1  vernier 
tuning,  phono-connection,  AVC, 
wave  trap,  automatic  tone  compen- 
sation and  iron  core  I.F.  transform- 
ers. Lists  at  $89.95.  RCA  Mfg.  Co., 
Camden,  N.  J — Radio  Today — see 
also  advt.  page  21. 

Universal  110  AC— 6-volt  set 


*  Knight  5-tube  superhet  for 
universal  operation  from  110  volts 
AC  or  from  a  6-volt  storage  battery. 
Set  designed  to  meet  the  needs  of 
automobile-trailer  travellers  and  of 
residents  in  rural  areas.  By  using 
a  circuit  which  incorporates  a  spe- 
cial type  built-in  vibrator  unit  and 
new  type  tubes,  the  receiver  is  op- 
erated just  as  efficiently  from  the 
storage  battery  as  from  regular  110 
VAC.  Allied  Radio  Corp..  833  West 
Jackson  Blvd.,  Chicago,  111. — Radio 
Today. 


Automatic  tuning  adapter 

it  Adapter  for  any  receiver  to 
make  it  an  automatic  tuning  unit.  In- 
stallation instructions  furnished 
with  adapter  kit.  Each  kit  is  fur- 
nished with  complete  mounting 
templates  and  all  necessary  small 
parts.  Takes  about  an  hour  to  in- 
stall. Models  210  and  211  employ 
separate  tuning  circuits  and  tube. 
210  adapter  is  for  super-heterodynes 
and  model  211  is  a  converter  which 
may  be  used  on  either  tuned  R.P. 
or  super-heterodyne  sets.  Howard 
Radio  Co.,  Chicago,  III.— Radio  To- 
day. 


Simpson   tube  and  set  tester 

+  Model  440  tube  tester  —  cir- 
cuits incorporate  double  switching 
of  filament  terminals  which  permits 
testing  of  all  types  of  tubes  regard- 
less of  the  location  of  filament  ter- 
minals. Screen  fluorescence  and 
angle  tests  are  provided  for  "magic 
eye"  tubes.  Tests  of  diodes,  battery 
types  and  gaseous  rectifiers  under 
proper  load.  Set  testing  features 
are  six  AC  and  DC  voltage  ranges 
with  all  AC  ranges  available  for 
output  measurements.  Three  re- 
sistance ranges,  four  milliampere 
ranges,  six  decibel  ranges  from 
minus  12  to  plus  58  db.  Simpson 
Electric  Co.,  5216  W.  Kinzie  St., 
Chicago,  111. — Radio  Today. 


Directivity  controlled 
microphone 


*  Feature  in  the  microphone  de- 
sign is  the  "directivity  control" 
switch  found  in  the  new  "tri  polar" 
model.  Switch  knob  designed  to 
appear  as  an  integral  part  of  the 
microphone  case  and  permits  in- 
stant selection  of  uni-directional,  bi- 
directional and  non-directional 
characteristics.  As  illustrated,  the 
three  available  directional  adjust- 
ments are  indicated  by  the  corre- 
sponding easily  recognized  polar 
patterns.  Lists  at  139.50.  Shure 
Bros.,  225  W.  Huron  St.,  Chicago, 
111. — Radio  Today. 


Micro  beam  power  amplifier 


*  Amplifier  employing  a  new 
anti-emitting  heater  circuit  to  pro- 
vide for  high  gain  and  low  hum 
level.  Uses  self-healing  condensers, 
ceramic  insulated  resistors  and 
tropically  treated  transformers. 
Three  stages,  power  output  19  watts 
peak  power  25  watts,  gain  110  db., 
power  consumption  75  watts — size 
14"  long  6"  deep  and  9"  high.  Am- 
plifier Co.  of  America,  37-45  West 
20th  St.,  New  York,  N.  Y.— Radio 
Today. 


*  Pictured  at  the  top  is  a  5-tube 
AC-DC  compact  with  bakelite  cab- 
inet tuning  530-1,700  KC.  Beam 
power  output  tube,  audio  overload 
control,  power  line  noise  filter, 
electro-dynamic  speaker.  Model  BA- 
199  listing  at  $9.95. 

Model  BD-197  is  a  6-tube  AC-DC 
set  with  the  miracle  dial.  Cabinet 
was  created  by  the  world  famous 
designer  Count  Alexis  DeSakhnoff- 
sky.  Cone  shaped  dial  visible  from 
any  standing  or  sitting  position. 
Tunes  530-1,700,  5,800-18,000  KC  in 
2  bands.  List  $39.95.  Model  BF- 
191  is  a  6-tube  chassis  tuning  530- 
1,700,  5,800-1,8000  KC— has  bakelite 
case — list  $25.95.  Emerson  Radio 
&  Phonograph  Corp.,  Ill  Eighth 
Ave.,  New  York,  N.  Y. — Radio  To- 
day— see  also  advt.  p.  2  &  3. 


Lever  tuning  radio 


*  Six-tube  single  band  receiver 
with  automatic  lever  type  tuning. 
Tunes  standard  broadcast  band. 
Dynamic  speaker,  automatic  vol- 
ume control.  List  $27.50.  Fergu- 
son Radio  Corp.,  745  Broadway, 
New  York,  N.  Y. — Radio  Today. 


Radios  in  furniture 

*  A  novel  line  of  radios  in- 
stalled in  furniture  has  just  been 
announced  by  Espey.  Series  con- 
sists of  line  of  five  models  which 
include  Chippendale  end  table,  drop 
leaf  end  table,  chest  on  chest,  Queen 
Anne  and  Sheraton  bureau  cabinet. 
Cabinets  finished  in  mahogany  or 
walnut  and  contain  standard 
chassis.  Prices  range  from  $49.95 
to  $155.  Espey  Mfg.  Co.,  124  East 
125th  St.,  New  York,  N.  Y.— Radio 
Today-. 


24 


Radio   Today 


WHEREVER  TUBES  PLAY  A  VITAL  PART 


-<u  - 


>m< 


M        m 


Mm 


'■   -.- 


r*/n 


X^1 


"<""  1*1: .:>C!    ^ 


#i 


It  is  just  as  important  for  _yo«  to  use  top  quality 
tubes  as  it  is  for  the  United  States  Navy.  Tbey  use  Raytheon 
because  it  is  the  tube  that  can  be  depended  on  to  work 
smoothly  in  any  circuit . . .  and  stand  up  under  the  roughest, 
usage  and  thundering  vibration  of  a  battleship  under 
fire.  The  Navy  can't  stop  in  the  middle  of  a  battle  to  find 
which  tube  has  blown! 

Leading  licensed  set  manufacturers,  too,  prefer 
Raytheon  because  of  their  sturdiness  and  uniformity.  And 
when  you  make  a  replacement  in  a  receiver  you  must  be 
just  as  confident.  That  is  why  thousands  of  Servicemen 
and  Dealers  depend  on  Raytheon. 

Order  Raytheon  for  greater  permanent  tube  profits. 


•  SAN  FRANCISCO 

NEWTON,  MASS. 


LARGEST     EX 


January,  1938 


25 


OBSTACLES  TO  SOUND  SALES 

Manufacturer's  sales  exec  blames     inferiority  complex     and 
lack  of  knowledge  as  drawbacks  in  selling  sound  equipment. 


*  DEALEES'  fear  of  quoting 
more  than  $50  or  $75  for  a  sound 
system  is  the  main  reason  why  many 
radio  dealers  are  not  successful  in 
their  sound  sales,  believes  the  sales 
manager  of  one  of  the  prominent 
sound  and  interphone  manufacturers. 

In  addition  the  radio  dealer  has 
the  "mousetrap  complex."  However, 
Emerson  was  wrong  about  the  public 
beating  a  path  to  one's  door  to  get 
a  good  mousetrap.  Sound  systems 
and  interphones  are  used  by  business 
organizations  who  have  been  trained 
to  have  the  salesman  call  upon  them. 
Seldom  is  it  that  a  sound  prospect  will 
go  out  of  his  way  to  buy  a  sound  sys- 
tem— yet  many  do,  showing  that  if 
the  dealer  were  sales-minded  he  could 
sell  plenty  of  equipment. 

After  all,  for  many  years  business 
has  managed  to  get  along  without 
sound  and  interphone  systems — why 
should  it  all  of  a  sudden  start  de- 
manding them?  Frankly  there  are 
many  good  reasons — increased  profits 
through  speedier  and  more  efficient 
execution  of  duties  is  but  one.  How- 
ever, there  are  very  few  business  ex- 
ecutives who  understand  what  sound 
will  do  for  them — and  that's  why  the 
rush  for  sound  has  not  been  greater 
than  it  is. 

Stocks  on  hand 

In  the  case  of  interphones  the  radio 
dealer  should  have  some  units  in  stock 
so  that  he  can  give  a  demonstration 
when  he  makes  his  calls  on  prospects. 
Greatly  handicapped  is  the  dealer  who 
must  make  a  second  call  for  a  demon- 
stration after  borrowing  some  units 
from  his  jobber.  And  then,  too,  it's 
unfair  to  expect  the  jobber  to  main- 
tain a  complete  stock  for  the  use  of 
the  various  dealers.  As  a  result  some 
jobbers  have  curtailed  their  stock, 
having  only  the  simpler  systems  on 
hand.  Result  is  that  the  dealer  in 
many  cases  must  demonstrate  with  a 
unit  which  will  not  fulfill  the  pros- 
pect's requirements,  and  consequently 
he  loses  the  job,  while  at  the  same 
time  creating  the  impression  that  in- 
terphones will  not  provide  adequate 
performance. 


This  Bogen  wireless  interphone  pro- 
vides communication  between  the  ele- 
vators and  gives  better  service  in  the 
absence  of  a  starter.  Unit  installed 
by  Thurow  Radio  of  Jacksonville, 
Fla.,  attracted  wide  attention  and 
pleased  the  tenants  of  the  building. 


Another  way  the  dealer  burns  his 
fingers  is  by  trying  to  sell  a  2-unit  or 
master  type  system  costing  from  $50 
to  $100,  when  a  fully  intercummuni- 
cating  type  of  system  costing  $250  or 
more  is  needed.  Seems  that  the  dealers 
are  fearful  of  selling  such  a  large  in- 
stallation since  they  are  accustomed  to 
handling  $50  to  $100  radio  sets  and 
cannot  think  in  larger  terms.  An  ade- 
quate system  will  usually  be  rejected 
with  the  comment  that  it  won't  work — 
the  prospect  really  meaning  but  not 
understanding  that  it  doesn't  fulfill 
the  requirements.  And  this  is  an  in- 
feriority complex — for  the  dealers  can 
sell  equipment  costing  hundreds  of 
dollars  when  it  fulfills  the  require- 
ments. 

Anticipating  the  needs  of  the  pros- 
pect, talking  over  the  requirements, 
and  making  suggestions  and  getting 


the  reaction  will  help  the  radio  man 
determine  what  is  necessary.  Then 
the  dealer  should  quote  a  price  for 
well-constructed  equipment  that  will 
give  him  a  fair  profit.  Furthermore, 
well-constructed  and  well-designed 
units  are  essential.  The  use  of  shoddy 
units  will  destroy  the  dealer's  reputa- 
tion quickly. 

Bigger  opportunities 

In  selling  interphones  and  other 
sound  systems,  remember  that  it  is 
the  large  organizations  that  need 
sound  most.  This  is  another  reason 
why  emphasis  should  be  placed  on 
larger  type  of  systems.  In  addition, 
the  larger  outfits  will  appreciate  the 
value  of  sound  systems  more  readily 
and  they  have  less  reluctance  to  spend 
the  necessary  money. 

At  present  much  of  this  business 
is  being  handled  by  the  radio  jobber 
and  specialty  sales  organizations  be- 
cause the  dealer  is  not  alert  to  oppor- 
tunities. We've  heard  of  cases  where 
schools  needed  equipment  and  wrote 
to  the  manufacturer.  Yet  when  the 
dealer  was  informed  by  the  manufac- 
turer, he  did  nothing  about  closing 
the  sale,  so  the  manufacturer  had  to 
handle  the  sale  direct. 

Dealers  who  are  established  in  their 
community  have  an  excellent  oppor- 
tunity to  sell  centralized  sound  sys- 
tems. They  can  easily  contact  the 
members  of  the  school  committee  and 
local  politicians,  as  well  as  keep  an 
ear  to  the  ground  for  news  of  develop- 
ments. 

Actual  installation  of  system  is 
usually  handled  by  local  electrical 
contractor  under  the  direction  of  the 
radioman  selling  the  system. 

Some  dealers  complain  because 
they  cannot  finance  such  an  installa- 
tion. But  usually  the  money  can  be 
raised  at  the  bank. 

As  related  by  the  sound  experts, 
most  of  the  failures  to  get  this  busi- 
ness are  because  the  dealer  is  not 
alert  and  sales  -  minded.  Then,  too, 
again  and  again  we  hear  of  the  radio 
man  who  goes  out  to  sell  sound  while 
dressed  as  a  mechanic  —  no  wonder 
(To  page  83) 


26 


Radio  Today 


Acts*'** 


actf«' 


0^? 


SNtO?1 


(High  Impedance)  and  RBMk  (200 1 


A  contact  mike  without  distortion.  Ideal  for  use  on  all  string 
instruments.  Flatters  an  ordinary  fiddle  by  giving  it  the  vol- 
ume and  depth  of  a  "Strad";  makes  a  small  piano  sound  like 
a  "Grand".  Unusual  high  output — can  be  used  on  radio  sets. 

No  string  changes,  no  drilling.  Attached  without  tools. 
Operates  with  either  high  or  low  gain  amplifiers.  Frequency 
response,  40  to  9000  cps.  Output,  — 40  db.  25'  of  cable. 

MODEL  KTH  (Hi-imp);  KTL  (200  ohms) S22.00  LIST 

KTH  or  KTL  with  foot-operated  volume  control . .  .  S30.00  LIST 

IJU'.'l»,l,',IJ4,UJMiii:IJI.MglBT!M 

The  smallest  velocity  made  .  .  .  but  has  an  output  equal  to 
larger  types,  — 68  db.  Frequency  range  60  to  7500  cps.  Excel- 
lent for  close  talking,  and  can  be  used  as  hand,  desk,  or  stand 
microphone.  Unusually  rugged.  Size  of  head,  1"  x  3/a"  x  27/a". 

MODELS  HDH  (Hi-imp);  HDL  (200  oms);  with  switch, 

S22.00  LIST 

P.A.  Men,  you  do  not  have  to  sacrifice  quality  on  a  "low-cost" 
job.  This  fine  velocity,  built  to  Amperite  standards,  is  excellent 
for  both  speech  and  music.  Gives  flat  response  without  peaks 
over  entire  audible  range.  Reduces  feedback.  Frequency 
range  60  to  7500  cps.  Output,  — 68  db.  Unusually  rugged,  not 
affected  by  temperature,  pressure  or  humidity.  Triple 
shielded,   fitted  with  shock  absorber  and   swivel  bracket. 

MODEL  RAH  (Hi-imp.)  with  12'  of  cable;  MODEL  RAL  (200 
ohms)  with  8'  of  cable ONLY  $22.00  LIST 


BROADCASTING  STUDIOS,   please  not 


New  Output,  —56  db. 

The  new  Amperite  Studio  Velocity,  model  SR80n,  has  — 56  db. 
output,  highest  in  studio  velocities  available  today.  The 
SR80n  is  now  accepted  as  the  finest  microphone  for  studio 
and  recording:  (Two  weeks'  free  trial  to  established  studios). 
Frequency  range  40  to  15000  CPS.  Triple  shielded,  fitted  with 
switch  (optional),  cable  connector,  and  25'  of  cable.  MODEL 
SR80Hn  (Hi-imp.);  SR80n  (200  ohms) $80.00  LIST 


IMPORTANT  USES 

1.  The  Acoustic  Compensator  enables 
you  to  lower  or  raise  the  response  ol 
the  microphone  by  the  mere  flip  of  the 
linger;  Not  a  volume  control — opera- 
tion is  similar  in  principle  to  the  sliding 
panels  in  broadcast  studios. 

2.  Makes  the  Velocity  immediately  ad- 
justable to  close  talking  or  distant 
pickup. 

3.  Immediately  adjustable  to  any  room 
condition  ...  or   any   type   ol  job   or 


Increasing  the  quality,  without  increasing 
the  price,  is  the  keynote  ol  the  Amperite 
sales  policy.  In  the  new  Amperite  Velocity, 
with  the  Acoustic  Compensator,  the  P.A. 
Industry  has  the  last  word  in  microphone 
periection  at  a  competitive  price. 

MODELS  RBHk,  RBMk,  with  acoustic 
compensator.  Frequency  range  40  to  11.- 
000  CPS.  Output,  —65  db.  Complete  with 
switch,  cable  connector  and  25'  of  cable. 
$42.00  LIST 
MODELS  RBHn,  RBMn,  without 
acoustic  compensator  $42.00   LIST 


SALES    AIDS    TOR    THE    P.A.    MAN 

Amperite  offers  the  following  co-operation  to  P.A.  Men 

f.   FREE:  Window  Decal  advertising  your  Sound  Service. 

«  Size  S'/tzS'A,  finished  in  4  striking  colors. 

2.    FREE:  Window  Display,  11x17. 

3.   Special  Sound  Equipment  Letterheads.  Samples  and  prices  on  request. 

Write  for  these  valuable  sales  helps,  and  new  Illustrated   Bulletins,  today! 


Amperite (5. 


561  BROADWAY,  N.  Y.    U.S.A. 


CABLE  ADDRESS 
ALKEM,  NEW  YORlt  I 


AMPERITE 


MICROPHONES 


January,  1938 


NEW  THINGS— Cont'd. 


Stromberg-Carlson  sets 


Gas-electric  generating  plants 


*  Six  new  models  now  available 
— 350  watt  AC  model  in  the  manual 
started  type,  self-starting  model  of 
the  same  capacity  which  produces 
both  110  AC  and  12  v.  DC  for  bat- 
tery charging,  remote  control  self- 
starting  unit,  350  watts,  started 
from  any  remote  switch,  which  also 
produces  both  AC  and  DC.  Other 
models  are  12  volt,  400  watt— 32 
volt  500  watt  and  a  high  output 
light  weight  unit  of  600  watts,  110 
DC  capacity.  D.  W.  Onan  and  Sons, 
43  Royalston  Ave.,  Minneapolis, 
Minn. — Radio  Today.  See  also  advt. 
page  57. 


Amperite   AC-DC   regulators 


+  New  regulators  equipped  with 
starting  resistor  which  prevents 
overloading  of  pilot  lights  when  the 
set  is  first  turned  on.  Model  KL- 
25H  will  replace  all  ballasts  start- 
ing with  K,  L,  M  or  BK  and  having 
numbers  between  11  and  26,  and 
ending  in  F,  G  or  H.  Model  KL-75H 
will  replace  all  units  starting  with 
K,  L,  M  or  BK  with  numbers  67  to 
105.  Amperite  Co.,  New  York,  N.Y. 
—  Radio  Today  —  see  also  advt. 
page  46. 


Television  tubes 

*  Specially  designed  cathode- 
ray  tubes  for  use  in  television  sets. 
Unique  design  prevents  de-focusing 
of  spot  when  video  signal  is  applied. 
Type  54-10-T  has  a  5-inch  diameter 
and  3,000  volt  rating.  Type  144-10- 
T  is  a  12-inch  tube  with  6,000  volt 
rating.  Allen  B.  Dumont  Labs., 
Upper  Montclair,  N.  J. — Radio  To- 
day. 


Safety  soldering  stand 

*  Soldering  stand  controls  iron 
heat  automatically  and  thereby 
gives  the  user  three  safety  features, 
protection  against  fire,  against 
burning  the  iron,  and  against  exces- 
sive current  cost.  Heat  control  is 
entirely  automatic,  stand  is  plugged 
into  the  current  socket  and  iron  is 
plugged  into  the  stand.  G-M 
Laboratories,  Inc.,  Chicago,  111. — 
Radio   Today. 


Ultra-sensitive   DC   meter 


*  Self-contained  battery  ope- 
rated DC  multimeter.  8  ranges 
from  .1  to  500  volts  with  5  meg 
meter  resistance.  Resistance  ranges 
from  .1  ohm  to  1,000  megs  with  less 
than  y,  volt  across  resistance.  122 
microampere  scales  from  .02  to  10,- 
000.  Automatic  stabilization — me- 
ter cannot  burn  out.  RCA  Mfg. 
Co.,  Front  &  Cooper  Sts.,  Camden, 
N.    J. — Radio   Today. 


Parts  kits 

*  Volume  control  kit  containing 
24  different  controls — takes  care  of 
95  per  cent  of  the  Philco  models. 
Part  No.  45-2488— list  $33.15. 

Electrolytic  condenser  kit  con- 
taining an  assortment  of  10  mid- 
get type  units  in  those  capacity 
values  most  commonly  used.  All 
condensers  rated  at  450  volts.  Part 
No.  45-1324— list  $11.80.  Philco 
Radio  &  Television  Corp.,  Tioga  & 
C  Sts.,  Philadelphia,  Pa. — Radio 
Today. 


Bell  interphone 


■*  Model  315-C  interphone  has 
been  added  to  Bell  line  of  equip- 
ment. New  unit  has  a  confidential 
ear-receiver  placed  on  the  side  of 
the  unit  so  that  the  raising  of  the 
receiver  cuts  out  the  loud  speaker 
and  makes  the  communication  con- 
fidential. Bell  Sound  Systems,  Inc., 
Columbus,  Ohio — Radio  Today. 


*  Eight  new  models,  including  a 
horizontal  table  radio,  three  laby- 
rinth radios,  two  standard  consoles, 
a  decorator's  half-round  console, 
and  a  combination  radio  and  auto- 
matic phonograph.  Electric  flash 
tuning  used  is  an  improved  trim- 
mer type  of  push-button  automatic 
tuning.  Covers  six  stations.  Strom- 
berg-Carlson Telephone  Mfg.  Co., 
100  Carlson  Rd.,  Rochester,  N.  Y  — 
Radio  Today. 


Universal    snapshot   camera 


■*  New  model  AF — 5  camera — 
lens  is  new  type  Achromar  individ- 
ually focused  and  adjusted  on  each 
camera,  negative  size  l%xlV6", 
camera  size  2-5/16x3  15/16xl3/16ths, 
weighs  6%  oz.  Camera  takes  Uni- 
vex  No.  100  Ultrachrome  film,  10c 
per  roll — 6  exposures.  Universal 
Camera  Corp.,  32  W.  23rd  St.,  New 
York,  N.  Y.— Radio  Today. 


Supreme  oscilloscope 


*  Oscyioscope  contains  2"  tube 
and  power  supply,  intensity  and 
focus  controls,  input  jacks  to  ver- 
tical and  horizontal  plates  and  in- 
ternal sinusoidal  sweep  supply  with 
gain  control.  External  linear  sweep 
and  amplifiers  may  be  used.  Su- 
preme Instruments  Corp.,  Green- 
wood, Miss. — Radio  Today. 


Radio   Today 


Size  is  an  indication  of  something 
important  to  you  as  a  buyer  of  radio 
components.  However,  we  take  far 
more  pride  in  Sprague's  consistent 
record  of  engineering  supremacy  than 
in  the  world's  largest  condenser  factory 
which    came    as    its     natural    result. 


■TO^^ss-  **"*» 


U 


> 


g;  _*    ^ 


SPRAGUE 

GOOD  CONDENSER5-EXPERTLY  ENGINEERED- 
COMPETENTLY  PRODUCED 


SPRAGUE   SPECIALTIES    COMPANY,    NORTH    ADAMS,    MASS. 


You  need  not  pass  up  a  single  prospect, 
with  the  Fairbanks-Morse  line.  There  is 
a  model,  a  size,  and  a  price  to  meet  every 
requirement.  In  addition,  models  without 
the  Conservador  offer  sparkling  beauty 
plus  every  desirable  feature  found  in 
other  refrigerators.  The  new  Fairbanks- 
Morse  "E"  line  goes  one  step  farther  and 
offers  the  exclusive  Conservador,  the 
greatest  of  all  features  in  any  refrigerator. 
No  other  refrigerator  line  can  offer  its 
dramatic  demonstration  possibilities.  No 
other  line  has  as  many  salable  features. 
More  prospects  ask  for  a  demonstration, 
and  you  close  more  sales,  when  you  have 
the  Fairbanks-Morse  refrigerator  with 
Conservador  on  your  floor. 


Models  with  the 
CONSERVADOR 


AdM 


<uu 


The  Fairbanks-Morse  Home  Appliance  franc! 
is  backed  by  the  hardest-hitting  sales  promotic 
and  advertising  you  have  ever  seen  .  .  .  and 
108  years  of  manufacturing  experience.  It  can 
include  refrigerators,  radios,  and  home  laundry 
equipment  .  .  .  one  or  all  three.  There  is  real 
profit  in  it  for  you  if  you  can  qualify.  Investigate 
.  .  .  write,  wire,  or  phone 

FAIRBANKS,   MORSE    &   CO. 

Home  Appliance  Division 
2060  Northwestern  Ave.         Indianapolis,  Indiana 


BANKS -MORSE 


have  real  selling 
FEATURES 


Three  new  lines  meet  every  pros- 
pect's  demands,  in  every  selling 
classification.  A  Super  De  luxe 
line  with  the  Conservador  ...  a 
price-leader  line  .  .  .  and  a 
De  luxe  line  without  the  Con- 
servador. The  new  "EL"  line 
without  Conservador  embodies 
all  the  engineering  skill  that  has 
typified  Fairbanks-Morse  manu- 
facturing for  more  than  a  century. 
With  this  new  De  luxe  line, 
dealers  have  an  opportunity  to 
supply  the  requirement  of  ex- 
acting prospects  who  demand 
the  utmost  in  quality  and  per- 
formance at  a  price  they  would 
expect  to  pay  for  ordinary  re- 
frigerators. In  addition,  there  is 
startling  eye  appeal  and  scores 
of  advanced  features.  Your  cus- 
tomers will  at  once  recognize 
any  refrigerator  in  this  De  luxe 
line  as  an  outstanding  value! 


Models  without  the 
CONSERVADOR 


<& 


For  a  tube  turnover  that's  swift  as 
a  mountain  brook  .  .  .  for  an  end- 
less stream  of  profit  that  pours 
right  into  your  cash  register  .  .  . 
sell  Sylvanias! 
—  •  — 
If  the  shelves  in  your  shop  are  jammed 
with  "sluggish,"  slow-moving  tubes 
...  if  your  customers  complain  about 
the  quality  of  the  tubes  you  sell  them 
.  .  .  YOU'D  BETTER  WAKE  UP! 
Switch  to  Sylvanias  before  it's  too  late! 

A  6-month  written  factory  guarantee 
back  of  every  Sylvania  tube  you  sell  is 
your  insurance  against  business-killing 
kickbacks.  Sylvania's  reputation  for 
quality — coupled  with  the  fact  that  the 
public  appreciates  this  quality — is  your 
guarantee  of  a  faster,  more  constant 
tube  turnover . .  and  the  quicker  profit- 
realization  on  every  lot  of  tubes  you  buy. 

Let  us  show  you  how  Sylvania  can 
make  your  tube  turnover  more  rapid. 
For  full  information  on  Sylvania's  com- 
plete line  of  sales  and  technical  helps, 
write  today  to  Hygrade  Sylvania  Corp., 
Emporium,  Pa. 


SYLVANIA 

SET-TESTED      RADIO      TUBES 


SOUND 

(From  page  26) 

poor  impressions  are  made. 

When  specialty  sales  organizations 
who  know  nothing  about  sound  and 
interphone  systems  can  sell  them,  the 
radio  dealers  with  aggressive  selling- 
can  make  this  sound  business  bigger 
and  better  with  increased  profits  for 
themselves. 


THEATERS  NEED  MORE  SOUND 

*  Bank  Kiglit,  newest  of  Ameri- 
can institutions,  has  spread  from  one 
end  of  the  United  States  to  the  other, 
covering  more  than  7,000  movie  the- 
aters throughout  the  country.  An  es- 
timated $500,000-  a  week  is  added  to 
the  movie  patrons'  income  through 
IBank  Night,  but  that  isn't  the  only 
income  materially  boosted  by  its 
advent. 

The  sale  of  Philco  sound  amplifiers, 
Model  905,  has  been  remarkably  in- 
creased by  the  widespread  use  of 
Bank  Night.  Small  movie  theaters, 
which  before  had  no  need  for  amplify- 
ing apparatus,  discovered  that  need 
for  drawings  and  announcement  of 
Bank  Night  winners  from  the  stage. 
A  new  market  for  sound  amplifiers 
was  opened  up  and  sound  dealers  have 
been  quick  to  take  advantage  of  it. 


AUTO  RADIO 

{From  page  15) 

ly  on  the  locations  of  the  an- 
tenna and  engine. 

And  as  a  safety  device,  a  radio  can- 
not be  excelled.  Storm  warnings  can 
be  picked  up  soon  enough  so  that  the 
skipper  can  hurry  back  to  shelter. 

Numerous  sales  aids  and  displays 
are  being  offered  to  the  dealers  by 
the  auto  radio  manufacturers.  Using 
these  helps  combined  with  aggressive 
selling,  the  1938  auto-radio  year  will 
be  the  biggest  yet. 


■*  A  new  catalog,  describing  and 
illustrating  21  models  of  microphones 
and  7  types  of  microphone  stands,  has 
been  released  by  Amperite  Co.,  561 
Broadway,  New  York  City.  Complete 
specifications  are  given  and  assorted 
accessories  are  listed. 


■*•  Issued  by  the  South  Bend  Lathe 
Works,  520  Niles  Ave.,  South  Bend, 
Ind.,  is  an  elaborate  new  catalog  on 
"The  New  1938  Model  South  Bend 
'Workshop'  Precision  Lathes."  Com- 
plete accessories  are  also  listed. 


Reproduction  of 
WEBSTER-CHICAGO 
Ad  In  Leading 
Industrial  Publications 


t-    anV 


locate   **££* 
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WEBSTER-CHICAGO  SOUND  EQUIP- 
MENT MAKES  MORE  MONEY  FOR 
DEALERS.  Direct  Advertising  cre- 
ates direct  leads  and  excellent  sales 
promotion  material  makes  it  easy 
for  dealer  to  solicit. 

WEBSTER-CHICAGO  ...  The  Com- 
plete Line  of  Public  Address  Systems, 
Sound  Equipment  and  Accessories  .  .  . 
Popular  Priced  Leaders  in  the  Sound 
Field  for  Over  12  Years! 

For  Complete  Catalog  or  Other 
Information     Address     Section     J-9 


WEBSTER-CHICAGO 

CHICAGO,  ILL 


5622  Bloomingdale  Ave. 


January,  1938 


33 


ARVIN    MODELS    818,     828 


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m 

Hi 
III 

I.  E  PEAK     455  KC 


Mil 


MOTOROLA    MODELS    9Y,    9R,    9A 
Chassis    9-1,    9-2,     9-3 


HiiHI 

B 

jpjBS 

«l 

RADIO 
TODAY 


iSMScSI 


.  F.    PEAK  465  KC 


n.        1/et  ptaci*s! 


WESTON 

MODEL    697 

VOLT-OHM- 
MILLIAMMETER 


Here's  a  convenient,  pocket-size  radio  test  instru- 
ment .  .  .  but  one  that  is  made  to  the  same  stand- 
ards of  accuracy  and  dependability  as  the  larger 
Westoin  instruments.  Nothing  has  been  sacrificed 
to  achieve  this  small  size.  The  ranges  provided, 
too,  are  complete  for  radio  servicing: 

%  Voltage  Ranges:    AC   and   DC-0-7.5;    0-15; 
0-150;  0-750. 

A   Current    Ranges:    DC    only    0-7.5    and    0-75 
milliamperes. 


Weston 

Instruments 


January,  1938 


#  Resistance   Ranges:    5000-500,000  ohms  full 
scale;  35-3500  ohms  center  scale. 

#  Size:  5-9/16"  x  3-3/4"  x  3-9/16". 

Model  697  is  a  most  convenient  tester  to  carry 
on  service  calls  ...  a  cinch  to  handle  on  the  bench 
or  around  the  shop  .  .  .  yet  it  is  extremely  low- 
priced  for  a  sturdy,  dependable  Weston  instru- 
ment. Model  697  and  other  pocket-size  Weston 
testers  should  be  included  in  every  serviceman's 
kit.  Be  sure  you  have  full  information.  Return 
the  coupon  today. 


Weston  Electrical  Instrument  Corporation 

597  Frelinghuysen  Ave.,  Newark,  N.  J. 

Send   complete   information   on   Pocket-Size   Testers. 

Name „ 


Address 
City 


State 


35 


UNDERSTANDING 
PUSH-PULL  AMPLIFICATION 

A  simplified  technical   explanation  of  how  push-pull 
audio  circuits  operate   and   of    the   benefits   derived 


*  In  most  audio  power  amplifiers 
where  large  power  output  and  high 
quality  of  reproduction  are  required, 
a  push-pull  circuit  is  used.  A  sche- 
matic diagram  of  a  push-pull  audio 
amplifier  is  shown  in  Figure  1.  It  is 
well  to  briefly  review  the  operation  of 
the  push-pull  circuit.  As  an  alter- 
nating current  is  passed  through  the 
primary  of  the  input  transformer  T5 
an  alternating  voltage  is  developed 
across  the  secondary,  at  any  in- 
stant one  end  of  the  secondary 
being  positive  and  the  other  end 
negative.  Since  the  secondary  of  T^ 
is  center-tapped  and  the  center-tap 
connects  through  the  bias  circuit  to 
the  filament,  the  grid  of  one  tube 
will  be  negative  when  the  other  is 
positive.  (This  statement  of  course 
neglects  the  bias  voltage.)  In  the 
tube  the  grid  of  which  is  made  nega- 


tive by  this  alternation,  the  plate 
current  will  decrease;  in  the  other 
tube  where  the  grid  at  the  same  in- 
stant is  positive,  the  plate  current  will 
increase. 

It  will  be  observed  that  the  primary 
of  T.„  the  output  transformer,  is 
center-tapped  for  the  +B  connection, 
the  plate  currents  for  the  two  tubes 
flowing  in  opposite  directions  through 
their  respective  halves  of  the  primary ; 
that  is,  in  both  sections  the  current 
flow  is  toward  the  center  tap.  The 
plate  current  and  the  load  voltage  go 
through  their  cycles  180  degrees  out 
of  phase;  that  is,  when  the  plate  cur- 
rent increases  the  voltage  at  the  plate 
decreases,  and  vice-versa.  With  no 
excitation  the  plate  voltages  of  Tube 
1  and  Tube  2  are  identical.  As  one 
grid  is  made  negative  the  plate  cur- 
rent decreases  and  EP  increases;  as 
the  grid  of  the  other  tube  is  at  the 
same ..  time  driven  positive  its  plate 
current  increases  with  a  correspond- 
ing decrease  in  EP. 

Opposing  voltages 

Since  the  plate  potentials  of  the 
two  tubes  were  originally  identical, 
so  far  as  the  center  tap  is  concerned, 
the  decrease  in  voltage  at  one  plate 
adds  to  the  increase  of  voltage  at  the 
other  plate  and  the  actual  voltage  de- 
veloped across  the  entire  primary  of 
T,  is  twice  as  great  as  that  across 
one-half  of  the  primary.  In  other 
words,  if  the  plate  voltage  of  each 
tube  is  caused  to  vary  150  volts  above 
and  below  its  normal  value  of  250 
volts,  the  peak  value  of  alternating 
voltage  developed  across  the  primary 
of  T,  will  be  300  volts.  Thus  the 
actual  alternating  voltage  developed 
across  the  primary  of  the  push-pull 
output  transformer,  with  the  plate 
impedance  correct  for  maximum  out- 
put and  with  identical  tubes,  will  be 
twice  that  which  could  be  developed 
from  a  single  tube  with  the  same  in- 
dividual grid  excitation  voltage.     Op- 


Fig.     2 — The     Eg-Ig     or     grid-voltage 
plate    current    characteristic    of    push- 
pull  tubes. 


•Excerpted  from  the  Basic  Advanced  Radio 
Course  conducted  by  the  Capitol  Radio  En- 
gineering Institute  of  Washington,    D.    C 


erated  Class  A,  since  one  tube  IP  in- 
creases in  the  same  proportion  as  the 
1P  in  the  other  tube  decreases,  the 
current  from  the  power  supply  does 
not  vary  during  the  cycle. 

The  push-pull  amplifier  has  two 
principal  advantages:  First,  it  re- 
duces or  practically  eliminates  any 
noise  due  to  voltage  variations,  hum 
component,  etc.,  in  the  main  power 
supply  or  in  the  grid  bias  circuit.  The 
reason  for  this  is  simple.  Assume 
that  the  voltage  of  the  plate  supply 
is  suddenly  decreased;  this  will  de- 
crease the  plate  current  of  both  tubes 
simultaneously.  The  normal  plate 
current  flows  in  opposite  directions  in 
the  two  halves  of  the  primary  winding 
of  T...  Thus  a  simultaneous  and 
equal  increase  or  decrease  in  both 
currents  will  result  in  like  changes 
in  opposite  fields  which  balance  out 
and  produce  no  voltage  across  the  sec- 
ondary winding  of  the  output  trans- 
former. Therefore,  a  ripple  in  the 
power  supply  will  not  produce  a  hum 
in  the  output  of  such  an  amplifier. 
In  a  similar  manner  any  irregulari- 
ties in  the  grid  bias  voltage  will  affect 
both  grids  equally,  the  consequent 
variations  in  the  output  thus  balanc- 
ing out.  This  makes  the  push-pull 
amplifier  much  less  noisy  than  an 
amplifier  of  equivalent  gain  using 
single  tubes  per  stage  or  employing 
tubes  in  parallel. 

Reduced  distortion 

A  second,  and  probably  more'  im- 
portant, advantage  of  push-pull  op- 
eration is  the  elimination  of  even 
harmonic  distortion.  When  a  tube  is 
operated  beyond  the  linear  portion  of 
its  EGIP  characteristic  curve,  har- 
monics are  produced  in  its  output,  the 
second  harmonic  usually  predominat- 
ing. If  the  tube  is  biased  so  that  it 
operates  around  the  exact  center  of 
the  linear  portion  of  the  curve,  dis- 
tortion due  to  non-linear  operation 
will  be  produced  when  the  excitation 
voltage  is  too  high,  that  is,  when  the 
tube  is  overloaded  and  the  grid  volt- 
age swings  into  the  upper  or  lower 
{Continued  on  page  42) 


36 


Radio   Today 


RCA-VICTOR    MODELS    810,    810K1,     810T 


FAIRBANKS-MORSE    MODELS    8AT8,     8AC2,     8AC3 
Chassis    8A 


m 


RADIO 
TODAY 


p=  ]6C5G 


I.F.   PEAK    456  KC 


IIS. 


APPLIANCE  DIVIDENDS 


APPLIANCE  SALES  IN  1937 

Units  Value 

Refrigerators 2,365,200  $400,000,000 

Washing  machines   1,650,000  114,000,000 

Ranges     400,000  50,000,000 

Vacuum    cleaners.    1,094,000  59,400,000 

*  Blessed  with  a  batch  of  new 
models  which  are  the  last  word  in 
convenience,  beauty,  roominess  and 
accessibility,  but  troubled  with  trade- 
in  problems  and  Fair-Trade  law  en- 
forcement, the  refrigerator  forces 
wound  up  1937  with  a  sales  total  of 
some  2,365,200  units. 

Ranking  this  figure  with  others,, 
the  recent  years  pile  up  the  follow- 
ing total  sales   of  "boxes" : 

Refrigerator 

Units  Value 

1933 1,016,000  $172,720,000 

1934 1,284,000  220,848,000 

1935 1,568,800  260,420,800 

1936 2,000,000  328,000,000 

1937 2,365,200  400,000,000 

Sales  of  electric  ranges  for  1937 
are  set  at  400,000  units,  with  a  value 
of  $50,000,000. 

The  value  of  air-conditioning  sys- 
tems and  equipment  sold  during  the 
past  year  will  be  almost  ten  times 
what  it  was  five  years  ago.  Here  are 
the  figures  as  collected  on  all  types 
of  equipment  by  the  Department  of 


Frank  W.  Greusel,  Milwaukee  jobber, 

making    Fair    Trade    history    as   head 

man  of  Wisconsin  Radio,  Refrigeration 

&  Appliance   Association. 


James  J.  Schneer  is  the  new  president 
of  Electrical  Appliance  Dealers'  Asso- 
ciation, Brooklyn,  N.  Y. 


Commerce:  1933— $7,816,780;  1934— 
$13,014,078;  1935— $17,276,678;  1936 
—$43,566,678.  The  latest  figure  for 
1937  includes  only  January  to  Sep- 
tember of  that  year;  the  9-month 
total  was  $52,650,203. 

A  separate  set  of  figures  is  now 
being  made  up  for  self-contained  unit 
air-conditioning  systems.  As  reported 
by  125  manufacturers  in  1936,  the 
value  of  these  was  $2,060,563;  for 
January  through  September,  1937, 
the  total  value  of  this  equipment  was 
already  $5,372,044. 

APPLIANCES  FOR  FARMS 

*  A  new  approach  to  the  farm 
market,  in  terms  of  home  appliances 
and  appropriate  power  for  them,  has 
been  presented  by  L.  I.  Archer  of  the 
marketing  specialists  Klau-Van  Piet- 
ersom-Dunlap  Associates,  Milwaukee. 

Says  Mr.  Archer  :  "There  is  no  need 
for  farm  homes  to  be  without  the 
advantages  and  conveniences  of  new 
appliances  and  equipment  now  avail- 
able for  farm  use. 

"There  is  practically  no  difference 
between  an  electric  washer  and  a  gas 
washer.  The  main  difference  is 
whether  powered  by  an  electric  or  a 
gasoline  motor.  The  same  is  true  of 
many  other  appliances  and  equipment 
used  on  farms.  There  is  no  reason 
why  farmers  shoud  hesitate  to  buy 
these  items  right  now — even  if  there 
is  the  possibility  of  a  hi-line  within 
the  next  year  or  two. 

"If  that  hi-line  does  come,  merely 
substituting  a  small  electric  motor 
for  a  gasoline  motor  changes  such 
equipment  into  electrics.  Small  elec- 
tric motors,  of  the  power  desired,  can 


be  purchased  for  just  a  few  dollars. 
"And  when  the  gasoline  motor  is 
removed  from  such  equipment,  it  is 
still  available  right  on  the  same  farm 
— as  a  portable  power  unit — to  be 
used  for  a  great  many  odd  tasks." 

LIST-BUILDING  IDEA 

*  New  Jersey  dealer  his  hit  on  a 
plan  to  keep  his  data  on  home  owner- 
ship of  radio  and  appliances  up  to 
the  minute.  Terlizzi  Bros.,  Bloom- 
field,  use  the  services  of  a  woman  sur- 
veyor to  collect  dope  on  all  house- 
holds  in   the  area. 

From  these  records,  the  sales  man- 
agers at  the  store  take  lists  of  pros- 
pects daily  and  divide  them  into 
groups  of  twenty.  The  firm's  outside 
salesmen  are  given  these  groups  to 
call  on,  day  by  day. 

Terlizzi  believes  that  the  system 
removes  wasted  effort  on  the  part  of 
canvassers,  who  not  only  know  def- 
initely whom  to  call  on,  but  what  to 
say  when  they  call. 

Kitchen-proved  Westinghouse 

•k  New  1938  line  includes  15  mod- 
els: HP-95,  HD-95,  HP-72  and  HD-72 
in  the  Emperor  series;  HP-62,  HD-62 
and  HD-52  in  the  Aristocrat  series; 
HPS-72,  HDS-72,  HPS-62  and  HDS-62 
in  the  Hostess  series;  HPS-52,  HDS-52, 
HDS-42  and  HDS-32  in  the  Patrician 
series.  Model  HD-62,  illustrated  here- 
with, has  dulux  finish,  food  storage 
space  of  12.24  sq.  ft.  (6.25  cu.  ft.), 
and  an  ice  capacity  of  108  cubes  or 
13  lbs.  Features  include  big-size 
humidrawer,  meat  storage  compart- 
ment, temperature  regulator  with 
finger-tip  dial  control,  kitchen  ther- 
mometer with  zones  marked  to  corre- 
spond with  regulator,  eject-o-cube  ice 
release     trays,     flexible    food     storage 


space,  etc.  Westinghouse  Electric  & 
Manufacturing  Co.,  Mansfield,  Ohio — 
Radio  Today. 


*  Recently  appointed  as  Norge  dis- 
tributors in  the  State  of  Oregon  and 
in  western  Washington  is  the  big 
Portland  and  Seattle  jobbing  firm, 
F.  B.  Connelly  Co.   Kenneth  Connelly. 

(To  page  40) 


38 


Radio   Today 


CHAPTER   1 — Recall  embarrassing  experiences  with  old  models.     CHAPTER   2 — Mention  name  of  a  mutual   friend   "who   owns   one." 


THE 

STORY 

OF  A 

SALE 


Photos  from  a  new  Fairbanks' 
Morse  film,  "Mrs.  Nelson  Wins 
a    Wager." 


CHAPTER    3— Sell   housewife    on    "easy    to    clean.' 


CHAPTER    4— Sell    the    husband    on    operating    cost. 


HAPTER    5 — Get    the    wife    to    try    a    new    feature    personally.        CHAPTER     6 — Do     all     the     talking     yourself     in     a     summary. 


IN  TALKING  UP  the  "ease"  and  "accessibility"  features  of  1938  models. 

KEEP  YOUR  HANDS  BUSY 


Photos  from  Easy's  new  show    produced    by    Yocafilm. 


IN   POINTING   OUT  the  trim  appeal  of  this  year's  progress  in  styling. 


IN   SHOWING   exactly  how  the  product  has  been  engineered  for  safety. 


(From  page  38) 

president,  has  announced  that  ware- 
house facilities  will  be  increased  and 
personnel  hiked  to  handle  the  com- 
plete Norge  line.  Special  ad  cam- 
paigns and  a  series  of  dealer  shows 
have  been  planned,  with  the  Connelly 
sales  manager,  W.  R.  McCurdy,  acting 
as  general  sales  manager  for  the 
Norge  line.  Lee  0.  Cox  is  district 
manager  in  the  area. 

*  General  sales  manager  Carl  A. 
Copp  of  Frigidaire  Division,  General 
Motors  Sales  Corp.,  has  announced  the 
establishment  of  a  company-owned 
branch  at  Nashville,  Tenn.,  where 
Fred  M.  Davison  has  been  appointed 
district  manager. 

From  San  Francisco  comes  the  news 
that  E.  L.  Williams,  Pacific  regional 
household  sales  manager  for  Frigid- 
aire, has  been  named  manager  of  the 
Los  Angeles  district. 

+  The  annual  Electrical  Exposition 
to  be  sponsored  in  Philadelphia  has 
been  set  for  April  18-23  inclusive,  at 
Convention  Hall. 

*  At  the  last  meeting  of  the  Elec- 
trical Appliance  Dealers  Association  of 
Brooklyn,  N.  Y.,  officers  were  elected 
for  the  coming  year:  James  J. 
Schneer,  president;  Max  J.  Zimmer, 
1st  vice-president;  Percy  Peters,  2nd 
vice-president;  Albert  H.  Bernhard, 
secretary;  A.  H.  Grafenstadt,  treas- 
urer, and  Sam  Klein,  sergeant-at-arms. 
Special  guests  at  the  meeting  were 
representatives  from  other  dealer  or- 
ganizations. From  the  Home  Appli- 
ance Dealers'  Association  of  Philadel- 
phia came  B.  H.  Pouch  er.  exec,  sec, 
J.  R.  Shryork,  Sam  Goldberg  and 
Louis  Sanza.  From  Queens,  N.  Y. : 
Joe  Dorsey  and  Jim  Hardy.  Repre- 
senting Manhattan  were  Jack  Shaneck 
and  Boris  Shalman. 

•k  Charles  E.  Wilson,  who  has  been 
vice-president  in  charge  of  General 
Electric's  appliance  and  merchandise 
department  since  1930,  has  recently 
been  named  vice-president  of  the  com- 
pany. Mr.  Wilson  is  a  native  New 
Yorker,  has  worked  with  GE  and  one 
of  its  constituent  companies,  Sprague 
Electric,  since  1899.  He  is  chairman 
of  the  board  of  the  General  Electric 
Contracts  Corp.,  Monowatt  Electric 
Corp.,  Electric  Vacuum  Cleaner  Co., 
and  Houses,  Inc.  He  is  also  a  direc- 
tor in  the  Edison  General  Electric  Co., 
Inc.,  Chicago;  Trumbull  Electric  Mfg. 
Co.,  Plainville,  Conn.,  and  General 
Electric  Supply  Corp.,  New  York. 

Announced  at  the  same  time  was 
the  election  of  Pliilip  D.  Reed  as  as- 
sistant to  the  GE  president,  Gerard 
Swope. 

if  Field  crews  for  Frigidaire  have 
been  organized  to  take  the  firm's  1938 
sales  plans  into  all  key  marketing  cen- 
ters of  the  nation,  late  this  month 
and  next.  Activity  is  supervised  by 
Frank  R.  Pierce,  manager,  household 
division,  who  has  named  3  crew  lead- 
ers: Lee  A.  Clark,  W.  I.  Buchanan 
and  Ellsworth  Gilbert,  headquarters 
execs. 

*  B  and  0  Radio,  Inc.,  Norge  job- 
bers, of  Newark,  N.  J.,  recently  had 
an  official  opening  of  their  new  build- 
ing at  620-634  Market  St. 


40 


Radio  Today 


NO 


DEALERS  ARE  ALREADY  DREAKING  "Pndud  2«otai." 
WITH  ptuAudi  DESIGNED  TO  MEET  PUDLIC  DEMAND 


TURNOVER  .  .  . 

High  product  turnover  and  liberal 
finance  plans  keep  your  capital 
working  for  you  all  the  time.  Low 
dealer  and  salesman  turnover 
proves  men  have  found  it  profitable 
to  sell  Norge  and  stick  to  Norge. 
You  owe  it  to  yourself  to  get  full 
details  of  the  Norge  franchise 
without  delay. 


TP-3 


BETTER     PRODUCTS... 

Every  survey  proves  Norge  appli- 
ances lead  in  customer  satisfaction. 
Norge  consistently  ranks  among  the 
first  three  in  public  acceptance.  The 
smashing  new  advertising  and  sales 
promotion  program  dramatizes  ex- 
clusive features  that  you  can  dem- 
onstrate in  your  showroom. 

NORGE      DIVISION      Borg  -Warner     Corporation,    Detroit. 

January,  1938 


YEAR-ROUND     PROFIT  .  .  . 

There  is  always  sales  activity  in  the 
Norge  line  of  Rollator  Refriger- 
ators, Concentrator  Gas  and  Electric 
Ranges,  Autobuilt  Washers,  Duotrol 
Ironers,  and  package  heating  and 
commercial  refrigeration  equip- 
ment. Every  month  is  a  profit  month         , 

J  r  ^M    NORGE  DIVISION  Borg-Warner  Corp., 

for  Norge  Master  Merchants.  ^H  ;       660  e.  Woodbridge  St.,  Detroit,  Mich 

I  would  like  to  receive  a  copy  of  your  new 

FREE    TO  APPLIANCE  DEALERS!  ' 

A  full  volume   on   appliance  selling   and   pro-  |     NAME 

motion.      Describes   a  complete   plan   of  store 

operation.    Tells   how  to   get  the    most  out   of  ,.  ,n)  r„ 

advertising    and   sales    promotion.    Shows    you 

how   to   make   more   money   in    the    appliance 

business.  ^^^^^^^      CITY 

-,,.,.  !     STATE 

Michigan  ■ 

41 


6  There's  money  in  those  radio 
noises.  On  service  calls  or  over 
the  counter,  you  can  sell  AERO- 
VOX  Line-Noise  Filters  to  most 
set-owners.     So  cash  in  with  .  .  . 


Six   types   of   filters   to   take 
care    of    anv    kind    of    line 


Consumer  folder,  "Clear 
Reception",  tells  the  story 
of  radio  noises  and  works 
up   consumer  interest. 

• 

Handy  plug-in  design.  Units 
plug  in  between  noisy  de- 
vice and  line,  or  between 
set  and   line. 

• 

Thoroughly  engineered. 
Really  do  a  noise-suppress- 
ing job.  Customer  satisfac- 
tion  assured. 


Select  correct 
filter  and  con- 
nections with 
the  AEROVOX 
Noise  Analyzer. 
Handsome.  Steel 
case.  Sturdy. 
Impressive. 
Only  $7.50 

^Dealer's    Net    Cost) 


Ash  .  .  . 


Local  AEROVOX  jobber  has 
these  filters  and  line  noise  an- 
alyzer in  stock.  Ask  to  see  them. 
Or  write  us  for  literature. 


PUSH-PULL  AMPLIFIERS 


(.Continued  from  page  36) 

bend  of  the  curve,  or  swings  positive 
with  a  consequent  flow  of  grid  cur- 
rent. Similar  distortion  will  be  pro- 
duced if  the  bias  voltage  is  too  high, 
thus  causing  the  tube  to  be  operated 
at  or  near  the  lower  bend  of  the  EGIP 
curve. 

When  distortion  such  as  this  occurs 
it  results  in  the  production  of  a  great 
number  of  harmonics  in  the  output. 
The  amplitude  of  the  second  harmon- 
ic is  greatest  (in  a  triode)  with  the 
other  harmonics  following  in  decreas- 
ing amplitudes.  Unless  the  overload- 
ing of  the  tube  reaches  very  large 
proportions  the  second  harmonic  is 
the  principal  source  of  noticeable  dis- 
tortion, except  in  the  ease  of  pentodes 
where  the  third  harmonic  is  large. 
The  arrangement  of  tubes  in  push- 
pull  as  shown  in  Figure  1  eliminates 
the  second  and  all  even  harmonics 
from  the  secondary  of  the  output 
transformer.  Since  the  push-pull  grid 
excitation  voltages  are  180  degrees, 
out  of  phase,  the  plate  output  voltages 
are  also  180  degrees  out  of  phase, 
therefore  they  add  in  producing  the 
output  in  the  secondary  of  T„.  In 
the  case  of  the  second  harmonic  there 
is  one  complete  cycle  for  each  alterna- 
tion of  the  fundamental.  Therefore, 
the  second  harmonic  outputs  of  the 
two  tubes  will  be  360  degrees  out  of 
phase  or  in  "phase.  It  has  been  shown 
that  all  in  phase  components  of  the 
two  outputs  are  balanced  out.  This 
applies  to  all  even  harmonics. 

Odd  harmonics 

This  does  not  mean  that  tubes  in 
push-pull  can  be  overloaded  to  an  un- 
limited extent  without  objectionable 
distortion.  When  the  overloading 
reaches  a  certain  point  the  third  or 
even  the  fifth  harmonic  will  assume 
serious  proportions  and  cause  notice- 
able distortion.  However,  two  tubes 
in  push-pull  can  be  worked  consid- 
erable harder,  individually,  than  can 
a  single  tube,  so  that  it  is  possible  to 
obtain  more  than  twice  the  output 
from  two  tubes  in  push-pull  than 
from  a  single  tube  using  the  same 
percentage  distortion  in  the  output 
as  a  limiting  factor. 

It  should  be  observed  that  since  the 
two  plates  are  at  equal  potential  with 
respect  to  the  center  tap  so  far  as  the 
direct  current  component  is  con- 
cerned, there  is  no  D.  C.  difference 
of  potential  between  them  and  they 
could    be    short    circuited    without    a 


flow  of  direct  current.  This  is  not 
true  of  the  alternating  component 
and  the  A.C.  voltage  developed  be- 
tween plates  can  be  almost  twice  the 
D.O.  voltage  of  each  plate. 

While  the  use  of  power  pentodes, 
due  to  their  high  value  of  power 
sensitivity,  often  enables  sufficient 
output  to  be  obtained  from  a  receiver 
without  the  necessity  for  a  first  stage 
of  audio  amplification  and  thus  sim- 
plifies and  reduces  the  construction 
cost  of  a  receiver,  the  disadvantages 
of  the  tube  may  outweigh  the  ad- 
vantages. 

Load  impedances 

When  power  pentodes  are  operated 
in  push-pull  and  the  load  impedances 
properly  adjusted,  (each  load  impe- 
dance equal  to  about  l/5th  the  tube 
impedance),  the  tubes  may  be  ope- 
rated so  that  practically  no  rectifica- 
tion due  to  the  bend  of  the  character- 
istic curve  occurs,  even  when  the 
grids  are  pushed  considerably  positive 
and  large  output  is  obtained.  How- 
ever, under  this  condition,  where  the 
distortion  due  to  non-linear  operation 
is  the  same  on  both  alternations  of 
excitation  and  the  load  is  properly 
adjusted,  the  third  harmonic  distor- 
tion will  be  high.  H  the  load  impe- 
dance is  not  correct,  being  either  too 
high  or  too  low,  the  second  harmonic 
rises   rapidly  with  variation   of  load. 

When  using  a  single  tube  a  com- 
paratively small  variation  in  the  load 
impedance  will  result  in  the  introduc- 
tion of  very  bad  second  harmonic  dis- 
tortion.. This  variation  in  load  im- 
pedance could  be  caused  by  resonant 
peaks  in  the  dynamic  speaker,  fre- 
quency variation,  etc.  In  other  words, 
since  the  impedance  of  an  inductive 
load  varies  as  the  frequency,  the  load 
impedance  will  not  be  correct  over 
the  entire  frequency  band  and  varia- 
tions in  the  load  impedance  will  re- 
sult in  much  greater  harmonic  distor- 
tion than  in  the  case  of  the  triode. 
Of  course  if  the  pentodes  are  operated 
in  push-pull  the  second  harmonic  dis- 
tortion will  be  balanced  out  but  the 
third  harmonic  may  still  assume 
serious  proportions. 

Degenerative  feed-back 

This  development  of  large  odd  har- 
monic voltages  in  the  output  has  al- 
ways been  the  most  serious  disadvan- 
tage of  the  power  pentode.  However 
the  quite  recent  development  of  "de- 
generative   feed-back"    has    provided 


42 


Radio   Today 


Here  it  is!  The  tube  made  to  order  for  the  service 
man.  Cunningham  Tubes  are  the  service  man's  special 
— and  here's  why. 

They  are  sold  only  for  replacement  service  work. 
They're  priced  so  you  get  the  profit  you've  always 
wanted  . . .  they're  made  and  guaranteed  by  the  world's 
largest  manufacturer  of  radio  tubes! 

Add  to  this  the  sales-making  array  of  selling  aids 
we  offer  for  1938 — and  you'll  see  why  Cunninghams 
will  pull  in  more  profits  for  you! 

SALES  AIDS  FOR  1938 

Window  displays;  streamers;  posters;  direct  mail  pieces; 
decals;  radio  check-up  posters;  newspaper  ads;  sales  and 
service  meetings.  Ask  your  distributor  for  full  details. 


January,  1938 


43 


Overloads 

don't  worry  me 


In  fact,  "I  can  take  it,"  whether 
it  is  heat,  cold,  or  the  ceaseless 
humidity  of  the  tropics  .  .  . 
all  the  headaches  that  confront 
the  set  builder.  In  this  partic- 
ular field  I  answer  this  prob- 
lem of  resistance  with  a  fixed 
resistor  whose  ,.  characteristics 
are  so  constant  that  they  oft- 
times  form  the  standard  by 
which  all  others  are  judged. 
Which  is  why  so  many  set 
builders  and  service  men  turn 
to  Centralab  for  the  satisfac- 
tory answer. 


]Z~u:;:£:;z?gSiiEJ 


Centralab  Resistors  are  a  solid  rod, 
hard  as  stone  throughout,  and  not 
just  a  delicate  resistor  placed  in  a 
tube.  That  is  why  Centralab  resis- 
tors will  carry  loads  of  many  times 
their  rating  without  damage. 
By  the  patented  Centralab  process 
only  the  central  portion  of  the 
ceramic  is  conducting.  Externally 
the  resistors  are  fully  insulated. 


Type 

510    rating 

V-2 

watt    size    Vs  x    % 

514 

1 

"    y*  x  i" 

516 

1% 

"        %  x  1% 

710 

y-i 

"    ysx  % 

Centralab 


Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 

BRITISH    CENTRALAB,    Ltd. 

Canterbury   Road,    Kilburn 

London,  N.W.6,  England 

FRENCH    CENTRALAB   CO. 
118  Avenue  Ledru-Rollin 
Paris  XI,   France 


SERVICE  NOTES 


a  means  of  reducing  all  harmonics, 
odd  and  even,  and  of  compensating 
for  variations  in  load  impedance  with 
frequency.  Briefly,  it  consists  of 
feeding  back  into  the  grid  circuit  a 
part  of  the  plate  output  voltage,  in 
such  polarity  that  inverse  distortion 
voltages  are  deliberately  introduced 
at  the  grid  to  neutralize  the  distortion 
developed  in  the  amplifier  itself.  This 
circuit  makes  practical  the  use  of 
power  pentodes  and  the  "beam"  type 
power  amplifier  tubes  for  the  devel- 
opment of  large  audio  power  with 
relatively  small  tubes. 

The  push-pull  amplifier  has  another 
advantage.  Due  to  the  fact  that  the 
D.C.  plate  current  components  flow  in 
opposite  directions  in  the  two  halves 
of  the  primary  winding,  the  two  D.C. 
fields  cancel  and  there  is  no  trans- 
former core  saturation.  Thus  the  ef- 
fective magnetic  permeability  of  the 
core  is  greater  and  the  transformer 
cost  may  be  reduced  by  the  use  of  a 
smaller  core,  of  fewer  turns,  or  both, 
without  sacrifice  of  inductance  in  the 
windings. 


Impedance  matching 

In  all  vacuum  tube  power  work  the 
necessity  for  impedance  matching  is 
encountered.  At  radio  frequencies 
impedance  matching  can  usually  be 
accomplished  by  changing  taps  on  a 
coil,  varying  the  coupling,  adjusting 
a  variable  condenser,  or  in  some  other 
relatively  simple  manner.  At  audio 
frequencies  this  is  not  so  easy  to  do. 
Here  large  values  of  fixed  capacity 
and  iron  core  transformers  are  used. 
It  is  evident  that  the  impedance 
matching  requirements  must  be  cal- 
culated before  construction  and  the 
apparatus  designed  accordingly.  Im- 
pedance matching  is  usually  accom- 
plished by  means  of  a  transformer. 
Just  what  is  meant  by  "impedance 
matching"  ? 

As  an  example,  assume  that  it  is  de- 
sired to  couple  a  single  Type  2A3 
power  amplifier  triode  to  a  dynamic 
reproducer.  The  plate  resistance  of 
the  tube  is  800  ohms ;  assume  that 
the  reproducer  has  an  impedance  of 
16  ohms.  Since  to  obtain  the  maxi- 
mum undistorted  output  the  tube 
must  operate  into  a  load  impedance 
equal  to  twice  the  internal  tube  im- 
pedance (for  triodes),  the  primary 
winding  should  be  designed  to  have 
an  impedance  of  800  X  2  or  160ti 
ohms  at  its  lowest  operating  fre- 
quency.    (Actually  a  higher  load  im- 


pedance is  recommended  for  this  tube, 
the  manufacturer  recommending 
2500   ohms.) 

The  turns  ratio  of  the  transformer 
to  match  these  impedances  can  be 
calculated  from  the  equation. 

Turns  Ratio   (Step  Down)    = 


vzP/zs 

where  ZP  is  the  impedance  across  the 
primary  and  Zs  is  the  impedance 
across  the  secondary.  With  the  values 
assumed  above, 


Tut 


Ratio  = 


V 2500/16 


V156  =    12.5 


Now  assume  that  this  same  repro- 
ducer is  to  be  operated  from  two 
Type  2A3  tubes  in  push-pull,  the  two 
tube  impedances  thus  being  in  series 
presenting  a  total  load  across  the 
primary  of  1600  ohms.     Then, 

Turns  Ratio  = 


V 1600/16  =    V100  =  10 


ARVIN  MODELS  818  &  828 

*  The  8-tube  home  type  Arvin 
receivers  use  a  rather  conventional 
superheterodyne  circuit  with  a  2-gang 
condenser.  (See  circuit  chart  on  page 
34.) 

Since  separate  trimmers  and  coils 
are  used  for  each  of  the  bands,  there 
are  no  interlocking  trimmers.  First 
the  oscillator,  then  the  antenna  cir- 
cuits are  aligned.  Frequencies  and 
location  of  trimmers  are  shown  on  the 
chassis  layouts. 

Self  bias  is  used  on  all  the  amplifier 
except  the  1st  audio  stage  and  1st 
I.F.  amplifier  which  derive  their  bias 
from  the  voltage  divider  circuit.  Sen- 
sitivity can  be  controlled  by  changing 
the  bias  resistors  on  the  I.F.  and  1st 
detector  tubes. 


MOTOROLA  MODELS  9Y,  9R,  9A 
CHASSIS  9-1,  9-2,  9-3 

*  The  9-tubc  Motorola  receivers 
employ  a  pre-selector  antenna  cir- 
cuit using  a  3-gang  condenser  when 
receiving  on  the  standard  broadcast 
band.  Antenna  secondary  is  induc- 
tively coupled  to  the  grid  coil  of  the 
first  detector.  (Circuit  shown  on  page 
34.) 

The  AVC  section  of  the  6H6G  di- 
ode is  capaeitively  coupled  to  a  tap  on 
the  primary  of  the3rd  I.F.  transformer. 


44 


Radio   Today 


Fixed  bias  is  employed  in  both  of  the 
audio  stages.  While  not  shown  in  the 
schematic,  an  electrostatic  shield  is 
used  in  the  power  transformer. 

An  auxiliary  drawing  gives  the 
trimmer  location  and  chassis  layout. 
The  I.F.  is  first  aligned  at  465  KC. 
The  BC  oscillator  is  then  aligned  at 
1700  KC  and  the  antenna  and  pre- 
selector trimmers  at  1400  KC.  Os- 
cillator series  padding  is  done  at  600 
KC  while  rocking  the  dial. 

Oscillator  trimmer  for  the  policeband 
is  adjusted  at  7,000  KC  and  the  an- 
tenna trimmer  at  5800  KC  while  rock- 
ing the  condenser  gang.  Shortwave 
band  aligned  at  22,000  KC  for  the 
oscillator  and  18,700  for  the  antenna. 

FAIRBANKS-MORSE  CHASSIS  8A 

*  Three  Fairbanks-Morse  models, 
namely  the  8AC2,  8AC3,  and  the 
SATS  use  the  8A  chassis.  Difference 
between  the  models  is  the  cabinet  and 
speaker  size.    (Circuit  on  page  37.) 

An  8-tube  superhet  circuit,  employ- 
ing a  tuned  R.F.  amplifier  on  all 
bands,  is  used  in  these  models.  Cir- 
cuit employed  is  quite  usual.  In  the 
audio  stages  fixed  bias  from  the  power 
supply  is  used.  In  the  oscillator  stage 
a  single  plate  winding  is  used  for 
both  the  BC  and  police  bands. 

Auxiliary  diagram  shows  the  chas- 
sis and  trimmer  layouts.  The  I.F. 
amplifier  is  aligned  at  456  KC.  Since 
there  are  no  trimmers  interlocking 
from  one  band  to  another,  there  is  no 
special  alignment  order  except  that 
the  oscillator  is  the  first  trimmer  to 
be  adjusted  on  each  band.  Frequen- 
cies and  location  of  trimmers  shown 
on   the   circuit  diagram. 

RCA  VICTOR  810  SERIES 

•  The  S10K,  810K,  810T  KCA 
models  have  similar  chassis  but  are 
housed  in  different  cabinets.  Nine 
metal  tubes  and  a  tuning  eye  are  used. 
(Circuit  on  page  37.) 

An  R.F.  amplifier  is  employed  on 
all  bands.  On  the  BC  band  the  an- 
tenna coil  is  the  bottom  section  while 
the  other  sections  are  used  as  a  secon- 
dary with  the  tuning  condenser.  On 
the  police  band  the  bottom  section  is 
shorted  out  and  the  next  section  up 
becomes  the  antenna  coil  and  the 
other  two  sections  the  secondary  wind- 
ing. Similarly,  on  the  shortwave 
band,  the  two  bottom  sections  of  the 
coil  are  shorted  out. 

The  coil  system  for  the  1st  detector 
is  quite  similar  to  the  antenna.  On 
the  BC  band  the  plate  winding  at  the 
bottom  is  most  effective.    On  the  po- 


GET  READY  TO  CASH  IN 
ON  1938  RADIO  SERVICE 

DUSINESS  ..  the  easy 
National  Union  way! 


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FREE  with  purchases  of 
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What  do  you  need  to  make  yours  the  "finest 
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is,  National  Union  is  ready  to  give  it  to 
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Now,  with  National  Union  condensers  it's 
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denser purchases  and  N.  U.  tubes  all  help 
to  earn  the  things  you  need.  Get  in  on  the 
N.U.  proposition  for  1938.  Get  in  on  it 
now!  Ask  for  name  of  nearest  N.U.  dis- 
tributor. 


QUflLTY!    NATIONAL  UNION'S  BY- WORD 


So  many  thousands  of  Radio  Service  Engi- 
neers have  proved  National  Union  quality 
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research   engineers  who   are  constantly  at 


THE     ROAD     TO 
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work  in  the  National  Union  Laboratories 
striving  to  improve  N.U.  Products  and  de- 
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research  staff  is  your  assurance  that  Nationa 
Union   Products   will   never  let  you   down 


hull  guarantee  on     4.    N.  U.  jobber  : 
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NATIONAL  UNION  RADIO  CORPORATION  RT-13S 

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State 

January,  1938 


45 


REPLHCEmEnT 


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Consult  your  jobber. 

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Is  Yottr 

INVENTION 

malting  income 
ior  yotM  • 

Valuable  inventions  often  fail  to 
produce  income  for  the  inventor,  be- 
cause of  his  inability  to  protect  them 
properly  or  to  contact  and  interest 
manufacturers  who  can  make  and  sell 
them  in  a  big  way. 

Management  of  inventions  for  prof- 
it is  a  specialized  business,  requiring 
the  cooperation  of  market  analysts 
and  production  engineers,  and  wide 
experience  in  manufacturing,  sales 
and   contract  negotiation. 

This  organization  accepts,  without 
fees  or  advances,  the  management  of 
inventions  that  can  pass  our  rigid 
tests  of  marketability  and  profit  pos- 
sibilities. 

We  have  the  necessary  contact 
channels  and  acquaintances  to  pick 
and  approach  the  right  manufactur- 
ers, and  can  place  licenses  on  royalty 
basis,  on  more  favorable  terms,  with 
more  responsible  companies,  and 
more  promptly,  than  most  individual 
inventors  could  hope  to  do. 

Correspondence  invited.  Ask  for 
free  folder  on  "Getting  Your  Inven- 
tion to  Market."  It  may  lead  to  sub- 
stantial  income   for   you. 

EBY  >  INVENTIONS,    Inc. 

Commercial   Trust  Building 
PHILADELPHIA,     PA. 


SERVICE   NOTES 


lice  band  the  central  tap  of  the  secon- 
dary is  grounded  and  the  bottom  two 
coils  act  as  a  primary  which  is  ca- 
pacitively  coupled  through  a  .00056 
condenser  to  the  lower  plate  coil. 

On  the  shortwave  band  the  two  bot- 
tom detector  coils  are  shorted  and  the 
lower  plate  coil  is  capacitively  coupled 
to  the  coil  next  to  the  top  which  acts 
as  a  primary  with  respect  to  the  top 
coil.  The  junction  of  these  two  coils 
is  grounded.  The  top  plate  coil  wind- 
ing also  is  inductively  coupled  to  the 
short  wave  winding  of  the  secondary. 

The  oscillator  circuit  is  the  con- 
ventional type  using  a  coil  tapped 
for  the  cathode  of  the  tube. 

I.F.  alignment  of  the  set  is  done  at 
460  KC.  x\ext  alignment  takes  place 
at  20,000  KC  —  oscillator,  detector, 
antenna  trimmers  in  the  order  given. 
On  the  police  band  there  is  only  one 
trimmer  —  the  oscillator  which  is 
aligned  at  6000  KC.  On  the  BC  band 
the  parallel  oscillator  is  aligned  at 
1500  and  the  series  at  600  KG. 

ELECTRONIC  ORGANS 
A  SERVICE  OPPORTUNITY 

*  While  to  date  only  some  6,000 
of  the  electronic  organs  are  in  use, 
each  unit  employs  at  least  ten  tubes 
which  should  be  replaced  at  yearly 
intervals,  according  to  the  manufac- 
turer, Hammond  Clock  Co.,  Chicago. 
Since  the  owners  have  critical  ears 
and  since  the  organ  tones  must  al- 
ways be  pure,  perfect  tubes  are  a 
necessity. 

To  the  serviceman,  the  amplifying 
equipment  is  similar  to  that  found 
in  usual  sound  systems.  Output 
tubes  are  push-pull  parallel  2A3's 
operated  class  A  for  a  20-watt  out- 
put. When  greater  powers  are  needed, 
power  amplifier  units  are  connected 
in  parallel;  sometimes  as  many  as 
25  or  35  are  employed,  utilizing  some 
200  or  more  tubes. 

The  Madison  Square  G-arden  in- 
stallation has  32  amplifiers,  employ- 
ing 228  tubes,  of  which  128  are  2A3's 
and  32  5Z3  rectifiers.  List  price  of 
tubes  involved  is  almost  $450.  But 
even  in  the  smallest  set-ups  the  tubes 
list  around  $15 — which  is  more  than 
twice  that  of  the  average  radio  set. 
Another  thing,  the  owners  have  the 
money  to  replace  the  tubes,  and  will 
not  expect  discounts,  since  the  Ham- 
mond organization  extends  none. 

In  some  areas  we  understand  that 
Hammond  Company  is  anxious  to 
contact    skilled    servicemen    with    a 


knowledge  of  amplifiers  to  help  han- 
dle its  service  calls.  Company  gives 
three  years'  unconditional  guarantee 
(tubes  excepted)  and  is  looking  for 
qualified  servicemen  to  handle  service 
calls  on  a  fee  basis.  If  you  feel  you 
are  qualified,  why  not  contact  the 
nearest  Hammond  representative? 

While  this  electronic  organ  hasn't 
reached  mass-production  proportions, 
for  the  wide-awake  serviceman  with 
a  good  knowledge  of  amplifiers,  it 
represents  a  new  source  of  income. 

CALIBRATED  RESISTOR  AS 
A  CALIBRATED  GAIN  CONTROL 

*  The  I.B.C.  resistor  analyzer 
unit  may  be  used  to  control  the  gain 
of  an  amplifier  in  terms  of  decibels, 
when  employed  as  a  calibrated  voltage 
divider  as  shown  in  the  accompany- 
ing diagram. 


The  calibrated  voltage  divider 
would  work  into  the  grid  circuit  of 
the  first  or  second  stage  of  the  ampli- 
fier. Below  is  given  a  table  showing 
the  proper  setting  of  the  dial  pointer 
to  effect  a  desired  gain  in  decibels 
from  an  insertion  loss  of  minus  30 
db.,  or  to  effect  a  desired  loss  in  db. 
when  used  as  an  attenuator. 

Decibels  Dial  Pointer 

Gain      Loss  setting 

0  30               32M  ohms 

3  27              45M 

6  24              64M 

9  21              90M 

12  18  125M 

15  15  180M 

IS  12  250M 

21  9  350M  . 

24  6  500M 

27  3  700M 

30  0  1  megohm 


46 


Radio  Today 


YOU'RE 

SURE 

OF  YOUR 
PROFITS 


UNDER  THE  TUNG-SOL 
CONSIGNMENT   PLAN 

You  don't  buy  Tung-Sol  Tubes, 
and  then  wait  until  they're 
sold  to  get  back  your  invest- 
ment. They're  put  in  your  cus- 
tody without  payment.  After 
they  move,  you  report  your 
sales,  pay  at  your  cost  price 
and  keep  the  profit.  No  cash 
investment— no  dead  stocks. 
And  our  ability  to  finance  is 
extended  to  you  without  any 
premium  whatsoever. 

It's  a  straightforward,  sim- 
ple, business  proposition  by  a 
concern  financially  able  and 
willing  to  give  this  co-opera- 
tion to  dealers  who  can  quali- 
fy for  the  Tung-Sol  franchise. 
Naturally,  Tung-Sol  dealers 
must  be  responsible,  ethical 
business  getters. 

Write  today.  Perhaps  you  can 
quality  tor  a  Tung-Sol  Consignment 
franchise     in     your     neighborhood 

TUNG-SOL 

"Uorifi.-flaur  Radio  "D-uL&ei. 

TUNG-SOL  LAMP  WORKS,  INC. 
Dept.  C  Radio  Tube  Division 

SALES  OFFICES:  Atlanta  •  Boston  •  Chicago 
Dallas  •  Kansas  City  •  Los  Angeles  •  Detroit 
New  York      •      General   Offices,   Newark,   N.  J. 


THAT  Tita/MafcrL 
YOU'VE  BEEN  LOOKING  FOR 


fuwitf 


65,349  DELIVERED  TO  THE  RADIO 
INDUSTRY  IN  THE  LAST  60  DAYS! 


A.  C.  Here  is  the  3-wire  brush- 
less  reversible  motor  Utah 
pioneered  for  the  electric  tun- 
ing of  radios.  Other  branches 
of  industry  are  finding  count- 
less  applications  for  this 
versatile  little  motor.  It  can 
be  supplied  for  any  A.  C 
voltage  from  6  to  115. 


Vs  ACTUAL  SIZE 


Here  is  an  arrangement  that 
demonstrates  the  adaptability 
of  these  motors  to  a  variety  of 
applications.  This  Utah  motor 
has  an  automatic  clutch,  a  gear  tram, 
manual  control  shaft  and  mounting 
plate.  Other  gearing  may  be  substi- 
tuted. Silver  contacts  are  used  on 
the  Thermostatic  Switch  and  Muting 
Switch.  Motor  is  squirrel  cage  induc- 
tion type  with  self-aligning  oil-less 
bearings. 


V3  ACTUAL  SIZE 


D.  C.  Here  is  the  3-wire  universal 
brush  type,  for  D.  C  and  A.  C, 
25-50-60  cycles.  Automatic  clutch 
and  driving  pinion  are  standard 
equipment.  All  Utah  motors  are 
easily  adapted  to  a  variety  of 
layouts.  Though  exceptionally 
compact,  they  are  built  to  take 
the  rigorous  starting,  stopping 
and  reversing  required  by  many 
applications. 


Vs  ACTUAL  SIZE 


Send  your  specifications] 

for  prices  and  details. 

Address  Dept.  RT1 


PATENTS  ISSUED  AND  PENDING 
ON  ABOVE  MOTORS 


UTAH  RADIO  PRODUCTS  CO. 

CHICAGO,  U.S.A. 

TORONTO  BUENOS  AIRES 

ONTARIO,  CANADA        IUCOA  RADIO  PRODUCTS  CO) 

"16  YEARS  OF  LEADERSHIP" 


January,  1938 


47 


1  %    Accuracy 
to    3.000    K.C. 

•  2%  for  Higher 
Frequencies 

•  Range   110   to 
20,000  K.C. 


Model   557   Complete 
DEALER   PRICE 
Only  Sift™ 

fO»V 

&VV^  IN  THIS 


N 


GUARANTEED 
LOW  PRICE 
SIGNAL   GENERATOR 


•  Wherever  you  go  you  will  hear  praise 
for  Model  557  Direct  Reading-  Signal 
Generator.  Continuous  use  day  in  and 
day  out  has  clearly  demonstrated  its 
remarkable     accuracy     and    reliability. 

Model  557  Direct  Reading  Signal  Gen- 
erator uses  plug-in  type  coils.  Five 
frequency  bands  are  covered  from  110 
to  20,000  K.C.,  all  fundamentals.  Com- 
pletely shielded  for  static  and  magnetic 
fields.  Attenuation  and  stability  are 
outstanding-  features.  Strong  signals 
both  modulated  and  unmodulated  are 
furnished. 

Each  individual  'coil  is  separately 
calibrated  by  an  exclusive  method  of 
peaking  with  trimmer  condensers.  Fur- 
nished compllete  with  batteries  and 
accessories. 


W«tt£ 


'  READIUTE    METER    WORKS 

I  119  College  Ave.,  Bluftton,  Ohio 

I  n  Please  send  me  more  information  on  Model  557 

I   Name    

|   Address    

I    City State 


SERVICE 


SERVICE  HEADACHES 

*  I've  separated  the  service  in- 
dustry's headaches  into  three  groups, 
writes  Richard  Mattison,  general 
manager  for  Casa  Radio  Co.,  Brook- 
lyn, N.  Y.. 

1.  The  "football  mechanic,"  I 
named  so  because  of  the  scientific 
way  he  kicks  a  radio  around  until  it 
starts  to  play  (maybe). 

2.  The  "corkscrew  mechanic,"  so 
crooked,  he  uses  bootleg  parts  in  a 
radio  he  repaired  for  his  mother  (and 
charged  her  plenty). 

3.  The  "nut"  that  repairs  sets  for 
glory  (and  is  forced  to  eat  in  a  dump 
because  he's  broke). 

SERVICE  TEST  PROCEDURE  USED 
BY  FACTORY  TROUBLE-SHOOTERS 

*  One  of  the  best  ways  that  a  ser- 
viceman could  learn  to  improve  his 
speed  in  locating  the  causes  of  trou- 
ble in  a  radio  set  would  be  to  take  a 
few  pointers  from  the  trouble-shooters 
in  a  radio  factory,  states  recent  issue 
of  Philco  Serviceman. 

The  trouble-shooters  are  the  men 
who  take  the  sets  that  have  failed  to 
pass  final  inspection  and,  from  a  few 
quick  tests,  determine  just  what  is 
wrong  with  the  sets.  These  men  are 
all  expert,  practical  and  theoretical 
radio  servicemen  who  must  be  good 
enough  and  fast  enough  to  work  on 
a  production  basis. 

Naturally,  their  method  of  attack 
and  procedure  in  locating  troubles 
must  be  orderly  and  scientific.  We 
list  below  the  condensed  procedure 
which  is  followed  in  the  Philco  fac- 
tory by  the  men  who  do  trouble- 
shooting work  on  Philco  sets.  The 
serviceman  who  follows  this  procedure 
carefully  will  find  that  he  can  do  his 
work  in  much  less  time  and  with  a 
far  higher  degree  of  accuracy  than 
he  ever  did  before. 

1.  Set  signal  generator  for   audio. 

2.  Connect  lead  through  a  small- 
capacity  condenser  to  grid  of  the  first 
audio  tube  and  note  if  signal  comes 
through. 

3.  Change  signal  generator  to  I.F. 
of  set  and  connect  to  grid  of  LP.  tube. 

4.  Check  padders  of  second  I.F. 
transformer  for  alignment. 

5.  Connect  signal  generator  to  de- 
tector oscillator  grid  and  check  for 
increase  in  signal.  Also  check  first 
I F.  transformers  for  alignment. 

6.  Change  signal  generator  to  1,000 
KC. 


7.  Tune  in  signal  on  broadcast 
band  of  set. 

8.  If  signal  is  tuned  correctly  at 
1,000  on  receiver,  oscillator  is  cor- 
rectly padded.     If  not — 

9.  Connect  signal  generator  to  an- 
tenna post  of  set  and  correct  dial 
reading,  with  high-frequency  padder, 
using  1,500  KC  from  signal  genera- 
tor. Change  oscillator  to  600  KC 
and  check  location  of  signal  at  low- 
frequency  end  of  dial.  If  off,  roll  in 
signal  at  600  KC  for  maximum 
reading  in  output  meter.  This  means 
alternately  adjusting  the  low-fre- 
quency padder  and  retuning  the  set 
until  the  maximum  reading  is  noted 
on  the  output  meter. 

Conclusion:  As  the  signal  genera- 
tor is  moved  back  through  the  re- 
ceiver from  grid  to  grid  of  the  tubes 
in  the  set,  operation  of  the  various 
stages  is  being  checked.  Failure  of 
succeeding  stage  to  increase  the  gain 
of  signal  indicates  trouble  in  that 
stage.  This  should  be  checked  first 
by  trying  the  padding  of  the  stage 
and  then  by  investigating  with  the 
Philco  circuit  tester  to  determine 
which  voltage  or  resistance  structure 
is  at  fault.  This  type  of  circuit  analy- 
sis will  save  much  time  in  repairing 
receivers  returned  to  dealers. 

CLEARING-HOUSE  FOR  INVENTIONS 

"Many  of  Radio  Today's  subscribers 
know  what  it  is  to  develop  inventions 
and  then  to  be  unable  to  interest  any 
substantial  company  in  marketing 
them  in  the  way  they  deserve,"  com- 
ments Hugh  H.  Eby,  well  known  radio 
manufacturer.  "Realizing  the  need, 
Eby  Inventions,  Inc.,  has  been  formed 
to  'give  the  inventor  a  break'  by  tak- 
ing over  the  management  of  new  de- 
vices and  getting  them  on  the  market. 

"It  is  a  natural  outgrowth  of  many 
years'  experience  in  handling  and 
licensing  valuable  inventions,  and  this 
experience,  the  wide  business  connec- 
tions, and  the  national  reputation  for 
responsible  dealing  so  built  up,  are 
now  available  to  the  individual  in- 
ventor on  a  cooperative  basis,"  ex- 
plains Mr.  Eby.  "The  company  is  lo- 
cated at  1200  Commercial  Trust  Build- 
ing, Philadelphia,  where  any  inventor 
can  address  a  letter  and  get  full  de- 
tails." 


IF  YOU  CHANGE  YOUR  ADDRESS 

,  .  ,  Will  you  please  send  us  both 
your  old  and  new  address  .  .  .  and 
allow  us  30  days  to  make  the 
correction  .  .  .  Thank  you. 

RADIO    TODAY 

480  Lexington  Avenue 
New  York  City 


48 


Radio   Today 


NEW  BOOKLETS 


*  Andrea  Radio  Corp.,  48-20 
48th  Ave.,  Woodside,  N.  Y.  (for- 
merly F.  A.  D.  Andrea,  Inc.),  have 
issued  a  new  export  catalog,  bring- 
ing the  firm's  radio  line  listings 
up  to  date. 

*  A  List  Price  Catalog,  with  dis- 
counts listed  at  bottom  center  of 
each  page,  has  been  released  by 
Spokane  Radio  Co.,  Inc.,  distribu- 
tors, 611  First  Ave.,  Spokane,  Wash. 
The  big  publication  is  presented  to 
dealers  as  silent  salesmen,  radio 
reference  book,  and  encyclopedia. 

■*•  Supplied  free  upon  request 
through  jobbers  handling  Sylvania 
tubes  is  a  revised  edition  of  the 
Sylvania  tube  characteristic  sheet, 
containing  characteristic  data  on 
all  tube  types  now  available  in  the 
Sylvania  line.  Data  on  15  new  type 
and  4  new  base  views  have  been 
added.  Data  on  older  types  have 
been  revised  to  bring  the  charac- 
teristics up  to  date.  Hygrade  Syl- 
vania Corp.,  500  Fifth  Ave.,  New 
York. 

*  Now  available  from  Cinauda- 
graph  Corp.,  Stamford,  Conn.,  is  a 
new  catalog  illustrating  this  firm's 
line  of  speakers.  Of  special  interest 
are  the  frequency  response  charts 
given  for  many  of  the  speakers. 
Sheet  illustrates  speakers  for  all 
uses.  A  line  of  infinite  baffle  cab- 
inets is  also  illustrated. 

+  Just  released  by  Clarostat 
Mfg.  Co.,  Inc.,  285  North  Sixth  St., 
Brooklyn,  N.  Y.,  is  a  9-page  bulletin 
in  which  are  listed  1200  exact  dupli- 
cate controls  in  numerical  order. 
This  is  the  latest  Clarostat  servic- 
ing data.  Copies  may  be  had  by 
writing  the  company. 

+  The  aviation  radio  section  of 
RCA  Mfg.  Co.,  Camden,  N.  J„  has 
just  released  a  132-page  book  for 
professional  and  sport  pilots.  Book 
contains  information  on  planning 
flights,  blind  flying,  aircraft  radio, 
radio  bearings  on  broadcast  sta- 
tions, obstruction  lighting  and 
heights  of  towers,  as  well  as  lists 
of  U.S.  radio-beacon  weather  sta- 
tions and  others  connected  with 
aviation.  Limited  copies  are  avail- 
able at  25c  each  from  the  company. 

*  General  Radio  Co.,  30  State 
St.,  Cambridge,  Mass.,  has  just  re- 
leased another  copy  of  the  "Experi- 
menter." Booklet  deals  largely 
with  the  use  of  the  sound-level  me- 
ter. Appliances  listed  are:  in 
acoustical  fields,  vibration  sound 
analysis  of  heavy  machinery,  noise 
elimination  in  factories,  offices,  etc. 
Details  of  background  noise  correc- 
tions in  the  measurement  of  ma- 
chine noise  are  given  along  with 
a  chart  to  make  it  easy. 

+  Free  to  those  writing  to 
American  Radio  Hardware  Co.,  Inc., 
476  Broadway,  New  York,  is  a  new 
catalog  of  up-to-the-minute  radio 
hardware,  cabinets,  containers  and 
display  boards. 


The  Worlds m  „ 

oi 

DRY  ELECTROLYTIC  CAPACITORS 


TXTHEN  you  order  C-D  electrolytics 
V V  you  KNOW  that  whether  it  be  an 
"8  mike"  or  a  "16  mike,"  it  will  be 
absolutely  the  best  obtainable  in  the 
industry. 

If  you  could  step  behind  the  scenes  at  the 
Comell-Dubilier  plant  and  witness  the 
careful  selection  and  inspection  oi  raw 
materials,  the  extreme  precautions  taken 
by  C-D  engineers  to  insure  positive 
sealing,  (C-D  dry  electrolytics  are  triply 
sealed),  against  corrosion  and  humid- 
ity, and  the  endless  test  and  inspection 
oi  the  finished  electrolytic,  you  would 
understand  why  these  condensers  are 
the  world's  fastest  selling  line  of 
electrolytics. 

Be  sure  you  say.  "C-D"  when  ordering 
your  dry  electrolytics.  Send  for  com- 
plete technical  data,  Today! 

CORNELL-DUBILIER 

ELECTRIC  CORPORATION 
1022  Hamilton  Blvd.,  So.  Plainfield,  N.  J. 


CORNELL-DUBILIER 

ELECTRIC    CORPORATION 

South    Plainfield,    New   Jersey 


"TOKFONE"—  The  1938  Sensation! 


Gives  You  Everything 

PEP  •  PUNCH  •  PRICE 


'TOKFONE,"  Jr. 

Consisting  of  Master, 
Remote    Station    and   ft 


TOKFONE,  Jr. 

Remote   Station 


50  ft.  of  wire 


10 


75 

NET 
PRICE 


TOKFONE,  Jr. 
Master  Station 


The    Biggest  Buy  in  Communication  Systems 
NOTHING     CAN    TOUCH    IT! 

GET  YOUR  SHARE! 

..CRASH    THISIFERTILE   MARKET! 

If  you're  in  a  position  to  "CASH-EN"  with  FAST  MOVING- 
LOW  PRICED  intercommunication  systems  then  you  owe  it 
to  yourself  to  get  in  touch  with  REGAL  —  NOW ! 

•  Note   These   Facts!  • 

TOKFONE  SYSTEMS — adaptable  to  meet  all  requirements — from  2  to  40  stations — beautifully  hand-rubbed 
cabinets — NO  PREFERENCES — NO  TRICKS — No  Makeshifts — All  New  Merchandise — Special  Units  if  Nec- 
essary— No  Quotas — No  Contracts — Buy  as  You  Need  Them — Manufactured  in  our  own  factory — we  stock  them. 

We  also  Manufacture  P.A.  Equipment  in  the  following  sizes:  6,  12,  15,  30,  60  Watt — Amplifiers — Parts 
used   are:   Aerovox-Thordarson — I.R.C. — Parmet-Rola — Clarostat-Eby   and    Holyoke — Nothina   but   the    best. 

SEND   FOR   CATALOG   SHOWING    COMPLETE   LINE! 
REGAL    AMPLIFIER   MANUFACTURING   CORP. 


14  WEST  17th  STREET 


Cable   address 
"Ramcoamp" 


NEW  YORK  CITY 


January,  1938 


49 


'ft* 


PHILC01 

dealers! 


AGAIN  in  1938! — your 
PHILCO  Distributor  has 
a  special  CROWE  Program 
to  help  you  sell  more  Auto 
Radios ! 

The  Five-Point  Crowe  Pro- 
gram means  easier  sales  and 
greater  profits  with  Crowe 
ON-THE-PANEL  Kits — at  no 
extra  cost! 

Crowe  1938  On -the -Panel 
Kits  include  these  special  fea- 
tures : 

•  Exact  Custom  Styling 

•  Official   Philco 
Specifications 

•  New  No-Glare  Dials 

•  Improved    Anti-Backlash 
Design 

•  Adaptable  to  Any  Car 

•  Quickly    Installed — 
Easily  Moved 

Ask   for   Crowe   Bulletin   205 


PARTS  JOBBERS! 

Enlarge  your  market!  Increase 
your  sales!  Radio  Dealers — New- 
Car  Dealers — Used-Car  Dealers 
— ALL  need  Crowe  On-the-Panel 
Controls  —  for  modernizing  or 
changing  old  radios  from  car  to 
car.  Ask  for  Bulletin  206. 


SALES  REINFORCEMENT 


CROWE  NAME  PLATE  &MFG.C0. 

17  75   Grace  Street 
CHICAGO,      ILLINOIS 


MORE  BOOKLETS 


*  The  complete  discussion  of 
"Radio  Receiver  Power  Supplies," 
prepared  by  the  engineering  dept. 
of  Aerovox  Corp.,  70  "Washington 
St.,  Brooklyn,  N.  Y.,  is  found  in 
two  booklets — The  Aerovox  Re- 
search Worker  for  Aug.-Sept.  and 
the  issue  for  Oct.-Nov. 

•  A  new  bulletin  on  multi- 
range  test  equipment  has  just  been 
issued  by  the  Weston  Electrical  In- 
strument Corp.,  Newark,  N.  J.  The 
bulletin  illustrates  6  standard  mod- 
els of  the  multi-range  test  instru- 
ments, and  contains  complete  de- 
scriptions of  their  uses,  ranges, 
electrical  specifications,  dimensions 
and  prices.  Among  the  instru- 
ments discussed  is  the  Type  I  ana- 
lyzer which  measures  AC  and  DC 
voltage,  direct  current  and  resist- 
ance over  a  total  of  33  ranges. 


•  To  be  sent  free  to  those  writ- 
ing Trav-ler  Radio  &  Television 
Corp.,  1036  W.  Van  Buren  St.,  Chi- 
cago, is  a  new  catalog  listing  the 
complete  Trav-ler  line  for  1938,  in- 
cluding the  16  automatic  tuning 
models  and  the  10  others. 


+  A  new  bargain  flyer,  listing 
several  hundred  items  in  rotograv- 
ure, all  of  interest  to  the  service- 
man, amateur,  public  address  spe- 
cialist and  experimenter,  has  been 
published  by  Wholesale  Radio  Ser- 
vice Co.  Copies  of  the  flyer,  C5, 
will  be  sent  upon  request  from 
headquarters  at  100  Sixth  Ave., 
New  York  City;  901  W.  Jackson 
Blvd.,  Chicago;  265  Peachtree  St., 
Atlanta,  Ga.;  110  Federal  St.,  Bos- 
ton, Mass.;  90-08  166th  St.,  Jamaica, 
L.  I.;  N.  Y.;  219  Central  Ave.,  New- 
ark, N.  J.;  or  542  Fordham  Road, 
Bronx,  N.  Y. 


RICHNESS  IN  SALES  AID 

+  A  new  series  of  illuminated 
displays,  banners,  circulars,  back- 
grounds and  direct  mail  cards,  to 
use  in  the  promotion  of  the  1938 
interim  models,  have  been  prepared 
by  Stromberg-Carlson. 

One  display,  photographic  style, 
is  illuminated  and  has  a  silver  foil 
background  with  5  associated  foil 
receiver  identification  cards  telling 
the  story  of  electric  flash  tuning. 
It  is  silk  screened  in  red  and  black 
and  features  a  figure  of  a  girl  touch- 
ing a  button. 

The  new  banner  is  large,  heavy, 
silky  and  red  with  gold  fringe,  cord 
and  tassel.  The  circulars,  for  cus- 
tomer distribution,  have  been  re- 
vised in  gold  and  black.  A  new 
window  display  is  also  in  the  series, 
with  gold  columns,  green  side  cur- 
tains, semi-circular  pedestals  for 
table  models.  Stromberg  also  offers 
a  new  post  card  series,  four  of  them 
done  in  original  cartoon  style. 


MORE  POWER  TO  YOU 


I  t,   Jor  if  our  radio 

*H  GUARANTEED 
RADIO  SERVICE 


■*•  A  modernistic  metal  figure  print- 
ed in  red,  green,  silver  and  black  is 
featured  in  a  new  display  released  by 
National  Union  Radio  Corp.  A  new 
sales  phrase  is  accented  as  a  shop  mes- 
sage for  guaranteed  radio  service.  The 
display  is  equipped  with  an  easel 
stand,  and  is  designed  for  either  show- 
window  or  store-counter  use. 

SINGLE  MODEL  BACKGROUND 

■*•  With  a  circle  in  powder  blue  and 
other  soft  colors  to  accent  the  white- 
ness of  the  product,  Stewart-Warner 
has  released  a  new  display  piece  to  be 
used  with  a  single  model.  Simplicity 
is  featured,  although  main  features  of 
the  refrigerator  are  graphically  let- 
tered. 

The  company  has  also  issued  a  7  in. 
x  10  in.  display  for  two  models,  with 
red  letters  in  cut-out  plywood,  lit  up 
by  a  row  of  lights. 

While  these  displays  are  being  used 
in   dealers'    stores,    Stewart-Warner   is 


erecting  big  outdoor  posters  all  over 
the  nation,  plugging  the  Sav-a-step  as 
"King  of  the  Kitchen."  These  are 
part  of  the  firm's  more-than-doubled 
sales  promotion  plans  for  1938. 


50 


Radio   Today 


Hard  Nuts 


— and  here's  a 
RIDER  BOOK 

explaining 
AUTOMATIC 
FREQUENCY 
CONTROL 

With  AFC  circuits  in  most 
higher  priced  models,  knowl- 
edge of  "AFC"  means 
money  in  your  pocket. 
Learn  the  practical  facts 
from  these  easily  under- 
stood explanations. 
Hard  covers,  144  pages, 
11.00. 

JOHN   F.  RID 

1440  Broad  wen 


RIDER  MANUAL 

VOLUME  VIII 

Because  \\  is  so  complete — be- 
cause it  explains  many  oF  the 
operations  peculiar  to  the  new 
sets — because  it  contains  every- 
thing given  us  by  more  than  100 
manufacturers — Volume  VIII  is 
the  biggest  Rider  Manual  yet 
issued.  1650  pages  give  you 
what  you  want — arranged  as  you 
want  it.  Order  it  —  and 
any  of  the  other  seven 
volumes  you  need  —  to- 
day I  The  eight  volumes 
now  contain  9620 
pages of  material  you  needl 


ER,   PUBLISHER 

',  New  York,  N.  Y. 


1650 
PAGES 

*1000 


YOU    NEED  ALL 


■        a  1  \J\J      1^  C  E.  U     n 

HPT  <Rtik& 


MANUALS 


•<ptt*CO" 
*0*p!y 

ut*its 


•  *.  t  O  R  S 

January,  1938 


USE  IT  WHEREVER 

RESISTANCE  MEASUREMENTS 

ARE  INVOLVED 


RESISTANCE 
ANALYZER  and  INDICATOR 

NEW    IMPROVED    TYPE 

(4M"  diameter  by  3J4"  high) 


A  Calibrated  Vari- 
able Resistor  In- 
strument for 
General  Use  In 
All  Types  o£  Re- 
sistance Meas- 
urements 


Valuable  to 

Servicemen 

Amateurs 

Radio  &  Electrical 

Engineers 

Manufacturers 

Experimenters 

Laboratories 

Colleges  & 

Schools 

Broadcast 

Stations 

.  .  .  And  to  Every- 
one Who  Has  Any- 
thing to  do  with 
Resistance  Meas- 
urements 


Unquestionably  the  finest  instru- 
ment of  its  kind,  the  new  IRC 
Resistance  Analyzer  and  Indicator 
has  countless  uses  wherever  fixed 
and  variable  resistances  are  in- 
volved. Among  these  are: 
For  determining  by  the  substitu- 
tion method  proper  values  for 
resistors  and  standard  Volume 
Controls;  estimating  required 
Volume  Control  tapers;  voltmeter 
multipliers;  wire  wound  rheostat 
or  potentiometer;  calibrated  gain 
control  or  attenuator;  voltage  di- 
vider, etc.  Complete  instructions 
included  in  16-page  folder. 

The  Analyzer  is  direct  reading.  It  has 
only  the  one  adjustment  knob  to  vary 
the  resistance  continuously  from  0  to  1.0 
megohm.  Circuit  consists  of  heavy  duty 
wire  wound  rheostat  type  element  from 
0  to  30,000  ohms  and  special  Metal- 
lized type  resistance  element  from 
30,000  to  1.0  megohm. 


Case  of  molded  Bakelite. 
Three  fuse  sizes  included. 
NET    PRICE     .     .     . 


$4 


95 


FREE  .  . .   / 
Just  Out  / 

Ask  your  jobber  for 
a  copy  o£  the  New 
1933  IRC  catalog 
containing  helpful 
information  and 
detailing  our  com- 
plete line  of  Resis- 
tors, Controls,Kits, 
Suppressors,  etc. 


INTERNATIONAL  RESISTANCE  COMPANY 

401  NORTH  BROAD  STREET.  PHTIADELPHTA.  PA. 


MAKERS    OF  RESISTANCE    UNITS*  OF  MORE   TYPES,  IN    MORE  SHAPES;  FOR 
MORE  APPLICATIONS  THAN  ANY  OTHER   MANUFACTURER    IN  THE  WORLD 


51 


h 


RADIO  YEAR  BOOK 

will  tell  your  story  all 
year  long  to  the  buying 
power  of  the  industry 


- ,938-i939  ~~! 


W«CTO|,y    L 


A  Complete  Buying  Guide,  Trade  Directory 
and  Reference  Manual 

Classified  lists  of  manufacturers  of  all  sets,  sound  equipment,  trans- 
mitters, inter-communicators  and  testing  instruments.  Also  manu- 
facturers of  tubes,  parts,  accessories,  equipment  and  raw  materials. 

Trade  names,  firm  names,  and  addresses. 

All  U.  S.  broadcasting  stations. 

Servicing  charts,  diagrams,  specifications. 

IF  peaks  and  RMA  color  coding  data. 

Auto  radio  installation  data. 

Charts  of  decibel  ratios  and  power  levels. 

Socket  analyses,  with  tube  voltages. 

Fair  trade  regulations  of  Federal  Trade  Commission  and  RMA. 

Statistics  of  the  radio  industry. 

Circulation  Assuring  the  Greatest  Possible 
Buying  Power 

Purchasing  agents,  engineers,  production  men,  jobbers,  service 
men,  merchandisers — all  who  need  a  quick  and  dependable  source 
of  trade  and  technical   information. 

SPECIFICALLY: 
Every    manufacturer    of    sets,    sound    equipment,    inter-communi- 
cators, transmitters,  testing  instruments,  etc. 

Every  manufacturer  of  tubes,  parts,  accessories,  equipment  and 
radio  materials. 

Every  U.   S.  broadcasting  station. 

Every  parts  jobber  and  set  distributor. 

and 

a  selected  list  of  several  thousand  of  the  largest  service  stations  and 
dealers  with  service  departments. 

GUARANTEED   CIRCULATION— In  Excess  of  16,000  Copies 
52 


Published  Annually 

A  Service  of  RADIO   TODAY 


1938-1939  EDITION 
GREATLY  ENLARGED 


SPECIAL   POSITIONS   FOR 
EARLY   ADVERTISERS 


Advertisements  will  be  placed  op- 
posite directory'  listings  or  other 
reference  material,  in  the  order  in 
which  copy  is  received.  After  these 
positions  are  filled,  copy  will  be 
placed  on  other  pages,  as  close  as 
possible  to  the  desired  position. 

RESERVATIONS 

Should  be  made  at  once  to  assure 
special  position. 


CALDWELL-CLEMENTS,  INC. 

480   Lexington   Avenue 

New   York 

• 

Telephone  PLaza  3-1340 


Publishing    Services : 

RADIO    TODAY 

SELLING  SOUND 

RADIO  YEAR  BOOK  &  TRADE 

DIRECTORY 

DIRECT    MAIL   SERVICE 


Radio   Today 


JOBBERS  ON  THE  JOB 


*  From  Facia  Radio  &  Electric 
Co.  comes  the  announcement  that 
the  Ott-Heiskell  Co.,  Wheeling,  W. 
Va.,  have  been  named  as  wholesale 
distributors  for  Wheeling  and  adja- 
cent area. 


*  The  Howard  radio  trailer, 
which  carries  20  models,  including 
home,  battery,  amateur  and  auto 
sets,  has  now  started  an  extended 
trip  through  the  Southeast,  accord- 
ing to  Charles  B.  Shapiro,  general 
sales  manager  for  Howard.  The  fa- 
mous trailer  has  already  covered 
some  12,000  miles  in  6  states,  work- 
ing for  14  jobbers.  Dick  Laycock 
pilots  the  outfit  and,  according  to 
Howard  Briggs,  Howard  vice-presi- 
dent, the  first  question  usually 
asked  by  the  distributors  is  "How 
soon  may  we  have  the  trailer 
back?" 


*  Stromberg  -Carlson's  recent 
contest  among  distributors'  sales- 
men netted  a  15  per  cent  increase 
in  the  number  of  SC  dealers  signed 
up  by  jobbers.  Top  man  among  the 
contestants  was  T.  A.  Pringle,  Gray- 
oar  Electric  Co.,  Minneapolis,  Minn. 
Next  10  high  men  were:  Walter  D. 
Ament,  Robert  F.  Clark  Co.,  Den- 
ver; W.  T.  Sutherland,  Jenkins 
Music  Co.,  Kansas  City;  Roy  Cun- 
ningham, Graybar  Electric  Co., 
Pittsburgh;  H.  H.  Wimple,  Farrar- 
Brown  Co.,  Portland,  Me.;  J.  H. 
Farter,  Jenkins  Music  Co.,  Kansas 
City;  C.  E.  Noonan,  Graybar  Elec- 
tric Co.,  Buffalo;  H.  C.  Gruber, 
Hudson  Valley  Asbestos  Corp.,  Al- 
bany; Burt  Harris,  Electric  Sup- 
plies Dist.  Co.,  San  Diego;  J.  W. 
Fetsch,  Hughes  &  Co.,  Spokane;  F. 
X.  Cain,  Graybar  Electric  Co.,  St. 
Louis,  and  R.  E.  Shenk,  J.  J. 
Pocock,  Inc.,  Philadelphia. 

*  More  than  400  Motorola  dis- 
tributors and  their  staff  members 
went  to  the  big  annual  Motorola 
convention  Jan.  6  in  Chicago.  The 
company's  new  1938  auto  set  line 
was  introduced,  got  a  reception  un- 
paralleled in  the  history  of  this  pio- 
neer manufacturer  of  auto  radio  re- 
ceivers. Paul  V.  Galvin,  Motorola 
president,  and  his  associates  were 
assured  by  jobbers  that  the  coming 
season  would  be  a  banner  one  for 
the  line. 


*  Philco  has  announced  a  group 
of  winners  in  the  recently  closed 
"10,000,000th  Philco"  contest  among 
distributors'  salesmen.  Winners  of 
wrist  watches  and  their  jobber  con- 
nections are:  J.  E.  Hardieick,  of 
C.  R.  Rogers  Co.,  Pittsburgh,  win- 
ner in  Group  No.  1;  Jack  Carney, 
Philco  Sales  and  Service,  Inc., 
Louisville,  Ky.,  winner  in  Group 
No.  2;  Hal  Heaton,  E.  C.  McKelvey 
Radio  Co.,  Salina,  Kan.,  winner  in 
Group  No.  3,  and  L.  R.  Moore,  Allen 
and  Jemison  Co.,  Tuscaloosa,  Ala., 
and  E.  C.  Schmier,  Schmiefs  Radio 
Shop,  Rock  Island,  111.,  who  tied  in 
Group  No.  4  and  therefore  received 
duplicate  watches. 

*  Two  new  distributors  for  Fair- 
banks-Morse are  H.  I.  Sackett  Elec- 
tric Co.,  173-175  Elm  St.,  Buffalo, 
N.  Y.,  for  the  surrounding  area,  in- 
cluding 8  counties  in  New  York  and 
3  In  Pennsylvania;  and  the  Adam- 
son  Supply  Co.,  Inc.,  315  W.  Camp- 
bell Ave.,  Roanoke,  Va.,  to  cover 
Roanoke  and  16  Virginia  counties. 
H.  I.  Sackett  heads  the  former 
firm;  John  Q.  Adamson  is  president 
of  the  latter. 

■*•  Bloch  Bros.,  wholesale  hard- 
ware company  of  Selma,  Ala.,  an- 
nounce that  they  are  discontinuing 
the  sale  of  broadcast  receivers  and 
will  accent  the  sale  of  amateur  ap- 
paratus and  serviceman's  supplies 
and  parts.  A  new  1938  catalog  has 
just  been  issued. 

*  Herrlinger  Distributing  Co., 
distributors  for  Tung-Sol  radio 
tubes,  have  recently  moved  to  new 
and  larger  quarters  at  1518-1520 
Race  St.,  Cincinnati,  Ohio.  They 
were  formerly  located  at  1714  Vine 
St.,  Cincinnati. 

*  Novel  Christmas  party  was 
given  this  year  by  W.  Bert  Knight, 
Inc.,  of  115  West  Venice  Blvd.,  Los 
Angeles.  Instead  of  having  cus- 
tomers come  to  their  place  of  busi- 
ness, Knight's  visited  their  various 
good  customers,  traveling  in  a  bus 
with  suitable  music  and  appropriate 
Christmas  carolers. 

*  Goshorn  Hard  10  are  Co., 
Charleston,  W.  Va.,  have  been 
named  exclusive  distributors  for 
Howard  radio  in  the  central  and 
southern  West  Virginia  area. 


Radio's  finest  tubes 
plus  radio's  faiiest 
equipment  deal  spell 
double  profit  to  you. 


"&•> 


•J&" 


»»tf,°'"  „itto¥0°5" 


NeWa«V,N-J-  obr,gaf,on   on      1 

my  part,  send  de 
equipment  deal. 


Illustrating  a  modern  trailer  service  successfully  offered  to  dealers  by  Baird 
Hardware  Co.,  Fada  distributors,  Gainesville,  Fla. 


I 

1 

I 

I 

I 

I 

1 

\ 

\ 

\ 

\ 


Mv  Jobber  i> 

W  .  .his   coupon 


January,  1938 


53 


CHECK 


QUALITY 

Any  way  you  wish  .  .  .  you  can  check 
Stancor  and  the  answer  is  always  the 
same — "It's  quality  that  counts." 

Sometimes  Stancors  cost  a  few  cents 
more  than  other  transformers  of  the 
same  characteristics  . . .  BUT  THEY'RE 
WORTH  IT. 


STANDARD 
TRANSFORMER 
CORPORATION 

850  BLACKHAWK  STREET    •    CHICAGO 


A  NEW  EDITION  OF 

RCAS  FAST-SELLING 

POPULAR  PRICED 

Portable  Sound  System 


There  are  loads  of  prospects  in  your  community  for 
this  equipment!  Small  auditoriums,  bus  terminals, 
restaurants,  small  night  clubs,  department  stores, 
and  many  others  all  have  use  for  it.  And  sales  to 
these  places  mean  handsome  profits  for  you. 

The  RCA  PG-111  Portable  Sound  System  is  easy 
to  sell!  First,  because  it  provides  many  fine  features. 
Second,  because  its  price  is  very  low.  The  sooner 
you  start  aggressively  selling  this  equipment,  the 
sooner  you'll  make  more  money. 

„ _ RCA  PG-111  Portable 

Sound  System ...  fea- 
tures include  Beam 
Power  Output  Tubes, 
Permanent  Magnet 
Speaker  of  high  sensi- 
tivity. Tone  and  Volume 
Control,  RCA  Aero- 
dynamic Microphone, 
Phonograph  Connec- 
tion. Weighs  only  25  lbs. 
Comes  complete  in  one 
sturdy,  compact  case, 
attractively  finished. 
List  price  $99.50. 


RCA  Junior  Velocity  Microphone 

Here's  a  swell  value  for  you  to  offer  your  P.  A. 
customers!  Exceptionally  low  in  cost,  the  RCA 
Junior  Velocity  Microphone  has  all  the  splendid 
features  once  available  only  in  the  velocity-ac- 
tuated type.  List  price,  less  stand,  $43.50. 


RCA  Aerodynamic  Mike 

So  small  you  can  hold  it  in  your  hand,  this  stream- 
lined microphone  is  one  of  the  greatest  values 
you'll  ever  be  able  to  offer  your  P.  A.  customers. 
Costs  only  $26.50  list,  less  stand.  Is  of  rugged 
construction,  provides  excellent  performance.  A 
fine  microphone  for  close  talking.  Requires  no 
external  excitation  or  power. 


GET    FREE    BOOKLET 

This  new  booklet  "Sound  by  RCA"  is 
worth  while  having.  Contains  full  details 
about  RC  A's  complete  line  of  sound  equip- 
ment. See  your  nearest  RCA  commercial 
sound  distributor  or  write  direct  to  us 
in  Camden,  New  Jersey. 


Any  sound  system  sounds  better  equipped  with  RCA  radio  tubes. 
Listen  to  the   "Magic  Key  of  RCA"  every  Sunday, 
2  to  3  P.M.,  E.S.T.,  on  NBC  Blue  Network. 


&mt0^a/ Seuttdf 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
A  Service  of  the  Radio  Corporation  of  America 


54 


Radio   Today 


JOBBER  NEWS 


Long  and  short  of  the  recent 
Crosley  jobber  convention.  Rob- 
ert Hall,  Steel  City  Appliance 
Co.,  Birmingham,  Ala.,  and 
Hymen  Reader,    Houston,   Tex. 

*  From  the  office  of  W.  Paul 
Jones,  Fairbanks-Morse  home  appli- 
ance division  general  manager, 
comes  news  of  the  appointment  of 
Peaselee-Gaulbert  Corp.,  Inc.,  At- 
lanta, Ga.,  as  a  new  FM  jobber  for 
the  entire  state  of  Georgia  (except 
9  counties)  and  6  counties  in  South 
Carolina.  Collier  W.  Helms  will  be 
in  charge  of  operations  for  the  area. 

+  Now  to  distribute  Crosley 
products  in  Washington  and  Ore- 
gon is  the  recently  appointed 
North  Coast  Electric  Co.,  of  Port- 
land ■  and  Seattle.  According  to 
P.  W.  Bialkowsky,  Crosley  Pacific 
coast  manager,  North  Coast  has  a 
lively  series  of  plans  for  promo- 
tions  on   the   line. 

*  The  new  sales  promotion 
manager  for  Westinghouse  Electric 
Supply  Co.,  150  Varick  St.,  New 
York  City,  is  A.  M.  Sullivan. 


•k  Meissner  Mfg.  Co.  have  named 
Bill  Carduner  as  representative  in 
lower  New  York  State,  including 
Albany,  New  Jersey,  Maryland,  Del- 
aware, eastern  Pennsylvania,  in- 
cluding Harrisburg.  and  Washing- 
ton, D.  C.  His  offices  are  at  17 
Warren  St.,  New  York  City,  where 
he  has  a  complete  Meissner  line 
for  emergency  orders;  regular  stock 
requirements  for  the  area  will  be 
shipped  from  the  factory  as  usual. 
Mr.  Carduner  opens  this  office  with 
a  long  period  of  radio  selling  ex- 
perience behind  him. 

*  Harry  H.  Moll,  Inc.,  Philco 
distributors  of  Denver,  Colo.,  have 
recently  added  Gibson  refrigerators 
to  lines  jobbed.  Personnel  at  the 
company  now  includes  Harry  Moll, 
president;  Joe  Rhuda,  sales  man- 
ager, and  salesmen  Bill  Newton, 
Leland  Carter,  Louis  Golm  and  Bill 
Wells. 

*  Jensen  Radio  Mfg.  Co.,  Chi- 
cago, have  recently  concluded  ar- 
rangements with  Canada  Wire  and 
Cable  Co.,  Toronto,  for  the  manu- 
facture of  Jensen  products  in  Can- 
ada. Under  the  supervision  of  K. 
M.  Clipsham,  Jensen  speakers  will 
be  manufactured  and  shipped  by 
Canada  Wire  and  Cable  Co.  The 
new  Jensen  sales  office,  with  C.  A. 
Savage  in  charge,  is  to  be  located 
at  45  Richmond  St.,  West  Toronto. 

*  Norge  has  announced  the  es- 
tablishment of  a  new  educational 
division  to  aid  distributors  and 
dealers  in  training  retail  salesmen, 
according  to  vice-president  P.  B. 
Zimmerman,  vice-president  in  charge 
of  sales.  E.  R.  Lovegren  will  head 
the  new  division,  and  William  P. 
Burruss  of  New  York  will  be  spe- 
cial sales  advisor. 

New  appointments  at  Norge  in- 
clude: R.  E.  Densmore  to  the  posi- 
tion of  general  field  sales  manager; 
Paul  H.  Puffer  as  domestic  refrig- 
eration sales  manager;  George  Mc- 
Intyre  to  head  a  new  department  to 
cooperate  with  utilities;  Jack  See- 
kamp  to  the  post  of  department 
store  sales  representative;  Charles 
H.  MacMahon  to  the  position  as  na- 
tional sales  manager  for  the  range 
department. 


A   new   parts   distributing   company   with    all    the    earmarks    of    success — 

Walker-Jimieson,  Inc.,  311  S.  Western  Ave.,  Chicago.     Left  to  right,  Ralph 

Walker,  Paul  Chauncy,  and  "Russ"  Jimieson. 


IM  t  W  Standardized 


J^e^t    ugench 


Paneli 


by 


Model  1404 

(Complete  as  Shown 
Less  Lamp) 


^Itifk^ 


Standard  Size 

Panels 

Accommodate 

Any  Master 

or  Deluxe 

Models 

• 

Pane! 

Cabinets  Can 

Be  Bolted 

Together 

if  Desired 

• 
Handy  Lamp 

Diffuses 

Light  Over 

Complete 

Front  Panel 


MODEL    1404    AS    SHOWN    CONTAINS 
THE    FOLLOWING    MODELS 

Single  Unit  Price 

1210-A  Tube    Tester    $22.00 

1209-D  D.C.    Volt-Ohm-Milliam- 

meter      20.00 

1200-iA  A.C.   Voltmeter    18.00 

1232        Signal  Generator    27.50 


Triplett  offers  for  the  test  bench  the  same 
kind  of  standardization  that  has  made 
Triplett  Master  Models  outstanding 
among  portable  testers.  You  can  start 
with  cabinet  and  one  tester  and  build  up 
as  circumstances  dictate. 

Testers  are  held  firmly  in  the  panel  com- 
partments by  flexible  rubber  grommets 
with  compression  fit.  Testers  are  in  regu- 
lar metal  cases  and  can  be  removed  for 
portable  use  when  necessary. 


Model  11S1-E  Portable 
Laboratory  combines: 
Models  1125-A  Volt- 
Ohm  -  Milliammeter, 
1151  All-Wave  Oscilla- 
tor. 1166-A  Free  Point 
Auxiliary  Set  Tester. 
Quartered  oak  case  size 
16|/2"  x  7!/2"  x  4%" 
deep.  Cover  is  remov- 
able. Complete  with  nec- 
essary batteries  and  ac- 
cessories. 
DEALER    NET,  $41.83 


P/iecvuon' 

ELECTRICAL    INSTRUMENTS 


THE   TRIPLETT  ELECTRICAL    INSTRUMENT   CO.  | 

191    Harmon   Dr.,    Bluffton,    Ohio  . 

Please  send  me  more  information  on  !| 

□  Model  1404  □  Model  1181-E  !, 

Name I 

Address    . 

City State | 


January,  1938 


55 


Thorobreds  perform  better,  show- 
better — and  so  do  the  thorobred 
1938  WARD  automobile  aerials, 
featuring  Mol-en-ac,  a  natural 
white  metal  that  cannot  rust. 

WARD  aerials  give  more  power, 
greater  reception,  smarter  lines, 
less  static  —  are  easy  to  install. 


The  QUINLAN  (at  left) 
Model  QR— a  streamlii 


TheSTATESMAN(right) 
Model  ST-a  new  Ward 
top  aerial.  Top  bar  ex- 
tends Irom  21  to  351 
inches.  Cowl  bar  is  tele- 
scopic, lits  all  cars.  No 
drilling  in  top.  Patent 
numbers  D106.048; 
D  106,049;   D  106,922 


WRITE  FOR  ILLUSTRATED  CATALOG 


T    WORD  PRODUCTS^ 

WARD  BUILDING  CLEVELAND,  OHIO 


RADIO  TRADE  FLASHES 


"THE  REPRESENTATIVES"  ELECT 

+  New  officers  and  committees 
for  the  year  1938  have  been  elected 
by  "The  Representatives,"  the  very 
active  organization  made  up  of  the 
representatives  of  radio  parts  man- 
ufacturers. Perry  Saftler  is  presi- 
dent, Dan  Bittan  vice-president  and 
David  Sonkin  secretary-treasurer. 
Mr.  Sonkin's  office  is  at  220  E.  23rd 
St.,  New  York  City. 

On  the  Board  of  Governors  are 
Jack  B.  Price,  chairman;  Dan  R. 
Bittan,  David  Sonkin,  Adolph  Fried- 
man and  Martin  Camber.  Member- 
ship committee  includes  John  For- 
shay,  chairman;  Adolph  Friedman. 
Julius  Kaelber,  Percy  Mack  and 
Irving  Golden.  Entertainment  com- 
mittee consists  of  Martin  Camber, 
chairman;  John  Koepple,  Marvin 
Roye  and  Jack  Scharf.  On  the  pub- 
licity committee  are  Dan  R.  Bittan, 
chairman;  Leo  Freed  and  Sam 
Eggert. 

■*•  Writes  Arthur  T.  Murray:  "I 
have  resigned  as  president  of  the 
United  American  BoscJi  Corp.  in 
order  that  I  may  become  associated 
with  the  Moore  Drop  Forging  Co., 
Springfield,  Mass.,  in  an  official  ca- 
pacity. My  interests  in  United 
American  Bosch  are  in  no  way  less- 
ened by  this  move,  as  I  will  con- 
tinue as  a  director  and  as  a  mem- 
ber of  the  executive  committee  of 
this  corporation.  My  successor  has 
not  yet  been  chosen  and  it  is  im- 
possible at  this  time  to  say  when 
this   decision  will  be  made." 

*  Pacific  Radio  Co.,  Chicago, 
have  now  opened  their  own  export 
department  and  shipping  warehouse 
at  4615  Ravenswood  Ave.  and  are 
offering  directly  to  foreign  distrib- 
utors their  extensive  Pacific  radio 
line. 

+  Cornish  Wire  Co.,  with  fac- 
tories at  Paterson,  N.  J.,  and  office 
at  30  Church  St.,  New  York  City, 
have  enlarged  their  facilities  and 
now  have  complete  manufacturing 
operations  under  one  roof.  The  firm 
now  makes  Corwico  radio,  hook-up 
and  public  address  wires,  etc.,  in  a 
single,  modern  plant.  Literature  on 
the  many  types  of  Cornish  wire 
will  be  sent  on  request. 

■*•  V.  T.  Rupp,  who  for  the  last 
11  years  has  been  responsible  for 
the  supervision  of  the  sales  of  the 
Burgess  Battery  Co.  in  11  western 
states,  will  gladly  connect  with 
other  manufacturers  seeking  dis- 
tribution in  the  California  trade 
area.  Mr.  Rupp  is  establishing  his 
own  business  as  a  manufacturer's 
agent  at  1101  W.  Olympic  Blvd., 
Los  Angeles,  has  a  wide  acquaint- 
ance built  up  in  radio,  electrical 
and  hardware  fields,  will  discuss 
matters  with  manufacturers  want- 
ing dependable  and  reliable  distri- 
bution in  his  area. 

+  W.  G.  "Bill"  Many,  who  has 
been  in  radio  for  almost  24  years, 
has  been  appointed  sales  and  adver- 
tising manager  for  Kenyon  Trans- 
former Co.,  Inc.,  840  Barry  St.,  New 


O.  F.  Jester  is  the  new  general  sales 
manager  for  Utah  Radio  Products  Co. 

York  City.  Known  in  the  trade  as 
an  expert  in  radio  sales,  advertis- 
ing and  editorial  activity,  he  has 
been  for  the  past  6  years  advertis- 
ing manager   for  Aerovox. 

+  Harry  Alter,  president  of  the 
General  Household  Vtilities  Co.,  has 
announced  a  convention  of  dis- 
tributors, called  for  the  world  pre- 
miere showing  of  the  new  Grunow 
Therm  erne  Refrigerator  at  the 
Hotel  Sherman,  Chicago,  on  Jan. 
25th  and  26th.  A  complete  line  of 
models  will  be  on  display  for  the 
inspection  of  the  jobbers,  and  sales, 
advertising  and  merchandising 
plans  will  be  presented  by  Mr. 
Alter  and  his  associates. 


Now    he's    the    sales    and    advertising 

manager  for  Kenyon  Transformer  Co. 

— W.  G.  (Bill)  Many. 


56 


Radio  Today 


JIM 
QUAM 


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netf 


yfltt, 


W*'S 


so 


>  ^u' 


tW 


h,p  man"'   .    nun--    ,esn  -  ,.„o 


ood 


viho 


*itt 


you 


oona"'" 


the 
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(act 


taV« 


that 
vgere 


J>iO 


out 


QUAM-NICHOLS  CO. 


33rd  Place  &  Cottage  Grove 
CHICAGO 


1 674  Broadway 
NEW  YORK 


ONE  CUSTOMER 
TELLS  ANOTHER 


The  "good  word" 
about  Ken-Rad  Tubes 
spreads,  and  you 
make  more  money. 
Take  the  first  step  to 
building  better  busi- 


Manufacturers  of  a  complete  line 
of  Standard  Glass  Types,  G  Series, 
and  Genuine  All-Metal  Radio  Tubes. 

Ken-Rad 

Radio  Tubes 

KEN-RAD  TUBE  8  LAMP  CORPORATION,  Inc.,  O.tnsborc.K,. 


Export  manager  Al   Stewart  of 

Wincharger  Corp.  is  confronted 

with   globe-circling   orders. 

■*•  Big  radio  event  in  Chicago 
recently  was  the  presentation  of  5 
new  Kadette  models  by  W.  Keene 
Jackson,  general  sales  manager,  In- 
ternational  Radio  Corp.  Mr.  Jack- 
son introduced  the  new  receivers  as 
"in  the  quality  class,  yet  at  rela- 
tively low  prices."  Also  at  the 
showing  were  division  sales  man- 
agers Al  Rapfogel,  Cleveland; 
Jimmy  Woods,  New  Orleans;  Jack 
Hurscli,  Denver;  Glenn  Kuffer,  Chi- 
cago and  Gere  Burns,  Kadette  sales 
promotion  manager. 

■k  Pierson-De  Lane,  Inc.,  Los 
Angeles,  recently  organized  to  take 
over  the  manufacture  and  distribu- 
tion of  the  PR  15  communications 
receiver,  have  taken  elaborate  quar- 
ters at  2345  W.  Washington  Blvd. 
Charles  Weinberg  is  general  sales 
and  sales  promotion  manager.  The 
list  price  of  the  PR  15  has  been 
changed  to  $22.50  complete. 

*  J.  W.  Dunbar  has  been  ap- 
pointed assistant  to  General  Elec- 
tric's  advertising  manager,  C.  H. 
Lang.  Mr.  Dunbar  has  been  with 
GE  since  1918,  has  edited  several 
company  publications  and  was  most 
recently  in  charge  of  magazine  ad- 
vertising for  GE's  incandescent 
lamp  department. 

■*  Sales  manager  Leon  L.  Adel- 
man  of  Cornell-Diibilier  has  started 
out  on  what  may  be  another  terri- 
tory-covering record.  Last  year  the 
fast-moving  executive  covered  over 
15,000  miles  in  3  weeks;  recently 
he  has  made  a  series  of  quick  hops 
to  Chicago,  Washington,  Pittsburgh, 
Detroit,  etc. 

+  /.  /.  Ross,  president  of  De- 
trola  Corp.,  Detroit,  Mich.,  recently 
sailed  for  Europe  on  an  important 
business  trip.  England,  France  and 
Belgium  are  included. 

*  Sales  representatives  of  the 
Continental  Radio  &  Television 
Corp.  got  together  in  Chicago  re- 
cently for  an  informal  meeting  at 
the  Lake  Shore  Athletic  Club.  Mer- 
chandising and  sales  promotion 
plans  were  outlined  for  the  two 
new  Admiral  automatically  tuned 
models.  Ross  Siragusa,  president, 
and  J.  H.  Clippinger,  vice-president, 
were  in   charge. 


ONflN  ALTERNATING 
CURRENT  PLANTS 
operate  AC  RADIO,  PUBLIC 
ADDRESS,  SOUND  CAR 
and  MOTION  PICTURE 
EQUIPMENT 


These  PLANTS  supply  electricity  for 
Domestic  and  Commercial  places 
where  current  is  not  available.  Op- 
crate  Water  System,  Refrigerator, 
Household.    Appliances. 

SIZES    TO    SUIT    EVERY    PURPOSE 

Operate  on  Gasoline,  Gas  or  Distil- 
late. Sizes  350  to  50,000  watts,  §110 
and  up.  Also  0,  12,  32  and  110  volt, 
DC  Models.  All  Models  furnished 
complete,  ready  to  run.  Write  for 
Details. 

D.   W.    ONflN    &    SONS 

587  Royalston  Ave.  Minneapolis,  Minn. 


•  Everything  you  need  in  radio.  It's  all 
in  this  new  RADOLEK  RADIO  PROFIT 
GUIDE.  Every  repair  part  for  every  re- 
ceiver. Newest  radio  receivers.  New  1938 
model  public  address  amplifiers,  outputs 
for  5  to  100  watts.  New  model  public  ad- 
dress speakers.  Test  instruments.  Technical 
books.  Special  equipment.  Leading  stand- 
ard brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 
And  everything  under  one  roof.  You  get 
what  you  want  promptly,  and  exactly  what 
you  want.  Radolek's  immense  stock  plus 
Radolek's  efficient  organization  insures  you 
fastest  service.  25.000  service  men  depend 
on  this  service  and  benefit  by  Radolek's 
Radio  Profit  Guide.  It  will  help  you  make 
more    money. 

RADOLEK 

601  W.  Randolph,  Chicago,  Dept.  D-15 

Send  me  the  193S  Radolek  Radio  Profit  Guide  FREE 


Address     

Serviceman?  □ 


Dealer?  □         Experimenter?  □ 


January,  1938 


57 


...MODERN 

EQUIPMENT 


ELECTRONOMETER 
SERIES  700  S49.95 


'  orough  tube  analyzing  and  point  to 
et     testing,     incorporating     22     ranges 

rements    of    A.C.    and    D.C.    voltages, 
it    resistance,    decibel   and   output. 

Accuracy     guaranteed     by     use     of     wire 
of  1%  tolerance  and  matched 


led  by   leading   engine 
:erns,    broadc — * 


See     "PRECISION' 


PRECISION 

APPARATUS  CORP. 

821    EAST   NEW   YORK  AVENUE 
BROOKLYN.  NEW  YORK 


ASK  FOR   FREE 

MICROPHONE 

COMPARISON 


CHART! 


Learn  About  the  New 

'Bullet'  MK  Higher  Fidelity 

Dynamic  Mikes! 

The  New  'Bullet'  microphones  challenge 
comparison.  Each  microphone  in  the 
new  'Bullet'  line  is  definitely  superior 
to  any  other  microphone  in  its  price 
class.  Every  model  is  engineered  and 
made  to  exacting  quality  standards 
comparable  only  to  rugged  telephone 
equipment.  'Bullet'  microphones  are 
technically  superior,  acoustically  cor- 
rect; they  are  streamlined  for  sound 
reasons.  Write  for  a  copy  of  the  free 
microphone  comparison  chart  with 
complete  data  on  the  new  'Bullet'  line 
.  .  .  now.' 


Model  MK  30  I     Priced  from 

$19.50  to  $90. 

'BULLET*  MICROPHONES 

Made  only  by 

TRANSDUCER  CORPORATION 

30   Rockefeller  Plaza.   New   York,   N.   Y. 


Ross  C.  Siragusa,  president, 
Continental  Radio  &  Televi- 
sion (right),  and  Harry  Clip- 
pinger,  vice-pres.,  on  a  hunt  in 
wilds  of  Northern  Canada, 
which  bagged  two  1,200-lb. 
moose. 

+  C.  A.  Verschoor,  president. 
International  Radio  Corp.,  and  Mrs. 
Verschoor  have  recently  returned 
from  a  tour  of  high  spots  in  South 
America.  The  trip  also  included 
stops  in  Kingston,  Havana  and  sev- 
eral days  in  New  York  City  before 
the  couple  returned  to  Ann  Arbor, 
Mich.  Mr.  Verschoor  is  said  to  be 
working  on  brand  new  ideas  with 
which  to  startle  the  trade. 

*  Several  promotions  in  the 
sales  department  of  Thordarson 
Electric  Mfg.  Co.,  Chicago,  have 
been  announced  by  Charles  P.  Cnsh- 
way,  general  sales  manager:  Roy 
E.  Davy,  formerly  chief  sales  engi- 
neer, now  holds  the  newly  created 
position  of  industrial  sales  engineer. 
Jerome  H.  Kleker  becomes  chief 
sales  engineer,  in  addition  to  his 
duties  in  the  sound  division.  Dong- 
las  "Dong"  Fortune,  W9UVC,  is  pro- 
moted from  the  engineering  staff  to 
the  sales  engineering  dept,  in 
charge  of  amateur  activities. 
Leland  S.  Hicks  is  sales  engineer 
in  the  replacement  transformer 
division. 


Thordarson's  general  sales 
manager,  Charles  P.  Cushway, 
has  announced  promotions  in 
sales    dept.    of    the    company. 


FOR  EFFICIENT 

TESTING... 


SERIES  840  L  -VOLT-OHM- 
DECIBEL    -    MILLIAMMETER 

including   a 
2500    VOLT    A.  C.    and    D.C.    RANGE 

and  a  1000  M.A.  RANGE 
Specifications 

*  5  A.C — D.C.  VOL-    *  5  OUTPUT  RANGES 

TAGE    RANGES    from    *  3  RESISTANCE 

0  to  2500  volts  at  1000    RANGES  from  0  to  10 

,  i,  megs,     (provision    lor 

ohms  per  volt.  se„*.  conVained  ba„e. 

*  4D.C.  CURRENT    ries). 

RANGES  from  0  to   1     *  5  DECIBEL  RANGES 
10  to  plus  63DB 


$19.95 


PRECISION 

APPARATUS  CORP. 

821    EAST   NEW   YORK  AVENUE 
BROOKLYN.  NEW  YORK 


**  o*N 

Install^^S 
CHANGERS    ■'& 


Phonograph  Record  Sales 
In  '37  Were  HIGH 


In  '38  They'll  Be 


HIGHER 


QKIilABLE  yet  inexpensive  record  changers  are  largely 
I*  responsible  for  it.  Equip  your  phonographs  and  com- 
binations with  General  Industries  record  changer  units. 
They  are  ready  assembled,  easy  to  install,  and  come 
within  the  price  range  of  most  of  your  customers.  Each 
unit  contains  a  silent,  smooth-running  Flyer  electric 
motor  with  turn-table,  the  latest  flat-type  balanced 
pickup,  and  an  improved  simple  and  accurate  changing 
mechanism. 

Send   Fop  Samples  To  Test 

Latest  improved  Model  M  plays  and  changes  eight  10- 
in.  or  seven  12-in.  records.  Model  K  plays  and  changes 
seven  10-in.  records,  plays  12-in.  records  changed  by 
hand.  When  ordering  samples  please  specify  exact  volt- 
age and  frequency  of  current  you  use. 

^General  Imdustmies  co. 

3838  Taylor  Street,  Elyria,  Ohio 
»  Equip  with  GENERAL  Changers  • 


58 


Radio  Today 


•     INDEX     • 
TO  ADVERTISEMENTS 


AEROVOX    CORP 42 

AMPERITE    CO 27,46 

ARCTURUS  RADIO  TUBE  CO 53 

CENTRALAB      44 

CLAROSTAT   MFG.   CO 60 

COLUMBIA   BROADCASTING   SYSTEM,  THE. 6,  7 
CONTINENTAL  RADIO  &  TELEV.  CORP.Cover  III 

CORNELL-DUBILIER    ELEC.    CORP 49 

CROSLEY    RADIO    CORP 4 

CROWE   NAME   PLATE  &   MFG.   CO 50 

EBY    INVENTIONS,    INC 46 

EMERSON    RADIO   &   PHONOGRAPH    CORP.. 2,  3 

FAIRBANKS-MORSE  &  CO 30,  31 

GALVIN    MFG.   CORP Cover  IV 

GENERAL  ELECTRIC  CO Cover  II 

GENERAL    INDUSTRIES    CO 58 

HYGRADE    SYLVANIA    CORP 32 

INTERNATIONAL    RADIO    CORP 45 

INTERNATIONAL    RESISTANCE    CO 51 

JANETTE   MFG.    CO 60 

JFD    MFG.    CO 59 

KEN-RAD   TUBE   &   LAMP   CORP.,    INC.    ...    57 

MALLORY  &  CO.,   INC.,   P.   R 1 

NATIONAL   UNION    RADIO    CORP 45 

NORGE    DIV.,    BORG-WARNER    CORP 41 

OHMITE    MFG.    CO 60 

ONAN   &  SONS,   D.  W 57 

PHILCO   RADIO  &  TELEV.  CORP.,  SET  DIV..   S 
PHILCO  RADIO  &  TELEV.  CORP.,  TUBE  DIV.  5 

PIONEER    GEN-E-MOTOR    CORP 51 

PRECISION    APPARATUS    CORP 58 

QUAM    NICHOLS    CO 57 

RADIO   CORP.   OF  AMERICA    23 

RADOLEK      57 

RAYTHEON      25 

RCA   MFG.    CO.,    INC.,   COMML.   SOUND 54 

RCA    MFG.    CO.,    INC.,    RADIOTRON    DIV....    43 
RCA   MFG.   CO.,    INC.,    RCA-VICTOR   DIV....   21 

READRITE    METER    WORKS    48 

REGAL  AMPLIFIER   MFG.   CORP 49 

RIDER,  JOHN   F 51 

SPRAGUE  SPECIALTIES  CO 29 

STANDARD   TRANSFORMER    CORP 54 

TRANSDUCER    CORP 58 

TRIAD    MFG.   CORP 60 

TRIPLETT    ELEC.    INSTRUMENT    CORP 55 

TUNG-SOL    LAMP    WORKS,    INC 47 

UTAH    RADIO    PRODUCTS   CO 47 

WARD    PRODUCTS    CORP 56 

WEBSTER-CHICAGO     33 

WESTON    ELEC.    INSTRUMENT  CORP 35 

WHOLESALE    RADIO    SERVICE    CO.,    INC...    59 


While  every  precaution  is  taken  to  insure  accu- 
racy, we  cannot  guarantee  against  the  possibility 
of  an  occasional  change  or  omission  in  the  prepa- 
ration  of  this   index. 


*  Charles  B.  Shapiro,  vice-presi- 
dent and  general  sales  manager  for 
Howard  Radio  Co.,  Chicago,  an- 
nounced recently  that  the  Los  An- 
geles Board  of  Education  has  pur- 
chased a  series  of  Howard  models 
368 — 8-tube  jobs  for  use  in  school 
rooms  throughout  the  city.  Mr. 
Shapiro  is  now  spending  a  few 
weeks  among  Howard  jobbers  in 
greater  New  York,  New  Jersey,  and 
Eastern  Pennsylvania.  Howard 
Briggs,  company  vice-president,  is 
landing  substantial  orders  for  How- 
ard push-button  convertors  from 
jobbers  in  the  Middle  West. 

+  Pleasantaire  Corp.,  1623  Con- 
necticut Ave.,  Washington,  D.  C, 
have  announced  a  new  "package 
merchandising  plan."  To  those 
dealers  who  request  information  on 
it,  the  company  will  send  (1)  a  new 
handbook,  (2)  announcement  of  a 
new  Built-in-the-wall  Pleasantaire, 
(3)  details  of  a  "sure-fire  sales 
plan,"  (4)  copies  of  inspection  re- 
port plans,  (5)  cost  of  sales  anal- 
ysis, (6)  a  survey  of  the  summer 
air-conditioning  industry. 

+  Rush  of  orders  has  been  noted 
at  J.  F.  D.  Mfg.  Co.,  4111  Fort  Ham- 
ilton Parkway,  Brooklyn,  N.  Y.,  for 
the  kit  of  Woven  Faoric  Dial  Belts. 
Acceptance  on  a  national  scale  was 
indicated  by  orders  for  some  350 
kits  in  six  weeks. 

*  Westinghouse  Electric  &  Mfg. 
Co.'s  radio  division  will  be  moved 
to  Baltimore,  Md.,  from  the  present 
location  at  Chicopee  Palls,  Mass., 
according  to  Walter  C.  Evans,  man- 
ager, radio  division.  The  firm  has 
purchased  a  new  plant  in  Baltimore 
and  will  build  executive  offices  ad- 
jacent. 

+  H.  A.  Marsh,  well  known 
among  advertising  agencies  and 
identified  with  radio  activities  for 
many  years,  has  opened  the  H.  A. 
Marsh  Advertising  Agency,  with 
headquarters  at  307  Fifth  Ave.,  New 
York  City.  Among  the  accounts  to 
whom  Mr.  Marsh  will  give  adver- 
tising and  merchandising  counsel 
are  the  following:  American  Com- 
munications Corp.,  Birnoach  Radio 
Co.,  Inc.,  Radiofone  Corp.,  Sun 
Radio  Co.,  Transmitter  Equipment 
Mfg.  Co. 


Here's  George  Turney  of  Gen- 
eral Products,  Houston,  Tex., 
who  is  going  to  town  with  his 
radio  club  chair  with  cocktail 
bar,  etc. 


RADIO  FABRIC  BELTS 

■  More  than  half  a  million  modern  radio  sets  now  in  use 
are  equioped  with  Woven  Fabric  Dial  Belts.  .  .  Every  one 
of  these,  sooner  or  later,  will  require  replacement  and 
this  replacement  will  be  repeated  again  and  again. 
The  Fibre  Board  Display  Kit  illustrated  contains  300 
assorted  radio  dial  belts  exactly  the  same  as  originally 
used  on  Zenith,  Emerson,  Grunow.Sparton,  Crosley,  R.C.A., 
Fada,  Stromberg-Carlson,  Detrola,  Silvertone,  (Sears, 
Roebuck),  Airline  (Montgomery  Ward),  and  every 
other  popular  radio  set  manufactured. 
The  attractive  kit  will  last  a  lifetime  and  should  be 
prominently  displayed  by  every  jobber  and  distributor. 
Send    for    complete    detailed    schedule. 

J.   F.   D.   MANUFACTURING   CO. 

4111   Ft.  Hamilton  Pkway,  Brooklyn,  N.  Y. 


%7\ 


$±k 


Lafayette 

RADIOS  AND  SOUND  SYSTEMS 


The  talk  this  year  is  all  about  LAFAYETTE— about  the 
great  1938  series  of  advanced  public  address  sound  systems 
— its  brilliant  new  line  of  70  radio  models  and  the  latest  in 
"ham"  equipment,  test  instruments  and  parts.  Learn  about 
in  the  Wholesale  Radio  catalog.  See  the 
ng  features  LAFAYETTE  offers.  Look  at 
the  prices.  Nowhere  else  can  you  enjoy  such 
tremendous  savings.  It's  all  in  the 

FRSS  CATALOG, 


V 


SEND  FOR  YOUR 
COPY  AT  ONCE  • 


UJHOLGSALE  RADIO  S£flVIC£  S 

NEWYORK,N.Y.  ,  CHICAGO, ILL.  .  ATLANTA.  6A. 


WHOLESALE  RADIO  SERVICE  CO.,  Inc. 
901  W.  JACKSON  BLVD.,  CHICAGO,  ILL. 
Rush  FREE  1938  Catalog  No.  69-I2A8 


Name 

Address 

City Slate 

jM-ritill-lTl»i«»iMJ«i8Mir.«MraT' 


January,  1938 


59 


THE  JOB 

with  Ohmite 
Brown  Devils 


End  replacement  resistor  failures 
— eliminate  call-backs — do  a 
service  job  you  can  safely 
guarantee — use  OHMITE  Vit- 
reous Enameled  BROWN  DEVIL 
Wire  Wound  RESISTORS.  They're  tough, 
extra-sturdy  units — built  of  the  same  materials 
and  to  the  same  rigid  standards  as  the  big 
Ohmite  industrial  resistors.  The  wire  is  ac- 
curately space-wound  over  a  porcelain  core 
and  coated  with  Ohmite  Vitreous  Enamel — 
the  coating  that  has  been  proved  by  many 
years  of  service  to  give  the  best  possible  pro- 
tection against  extreme  humidity  and  other 
severe  operating  conditions.  10  and  20  watt 
sizes.  Resistance  values  through  100,000 
ohms. 

Do  the  job  right  with  Ohmite/ 
Ask  your  Jobber  or  Write  for  Catalog  16 

OHMITE    MANUFACTURING    CO. 

4347  West  Flournoy  Street,  Chicago,  III.,  U.S.A. 


TRADE  FLASHES 


+  Better  Salesmanship  Campaign 
and  Prize  Contest  for  dealers  and 
their  salesmen  opened  the  first  of 
the  year  and  will  close  Feb.  28. 
This  is  the  fourth  such  event  staged 
by  Stromberg-Carlson,  under  the 
supervision  of  Jack  Kennedy,  sales 
promotion  manager.  Each  salesman 
in  the  contest  "will  have  a  chance 
at  attractive  prizes  worth  $80,  as 
well  as  the  grand  prize  of  an 
SC  245M  console.  Prizes  will  be 
given  for  points  earned  by  sales  of 
receivers. 

*  J.  E.  Armes  has  recently 
joined  the  firm  of  Johnson  Motors, 
refrigeration  division,  Galesburg, 
111.,  to  direct  the  promotion  of  the 
company's  new  Room-Cooler. 

•k  Stephen  Anderson,  lately  with 
David  Bogen  Co.,  now  celebrates  his 
25th  year  in  radio  and  allied  indus- 
tries. Back  in  1912  an  article  on 
how  to  make  an  electrolytic  detec- 
tor from  an  old  electric  light  bulb 
was  the  bug  that  first  bit  Steve  and 
started  him  off  with  an  amateur 
station  in  the  days  before  the  need 
for  a  license.  His  simple  schematic 
diagram  on  "A  Portable  Audion  Re- 
ceiver" was  published  in  1913  by 
Modern  Electrics  magazine.  After 
years  of  building  "loose  couplers," 
etc.,  on  a  custom-made  basis,  he 
served  "Western  Electric,  then 
brought  out  some  of  the  first  B 
eliminators  under  his  own  name 
and  for  Freshman. 

*  To  make  it  easier  for  radio 
service  engineers  to  earn,  through 
the  progressive  purchase  of  Na- 
tional Union  products,  a  complete 
supply  of  radio  servicing  equip- 
ment, the  firm  has  extended  its  free 
equipment  program  to  include  NU 
condensers  as  well  as  tubes.  Ac- 
cording to  an  announcement  by  gen- 
eral sales  manager  H.  H.  Kunkler, 
servicemen  will  be  given  "points" 
for  purchases  of  tubes  or  con- 
densers, to  apply  on  shop  equip- 
ment by  the  company  as  premiums. 

National  Union  has  adopted  the 
trade  name  of  "Videotron"  for  its 
cathode  ray  tubes,  following  an  in- 
crease in  research  and  production 
facilities  in  that  department. 


Janette  Rotary  Converters 

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for  years  of  trouble-free  service — used  or  recom- 
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Send  for  prices  and  data. 


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DETROIT- SEATTLE 


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TRIAD 

RADIO  TUBES 

Insure 
SATISFACTION 


Used  by  Leading  Set 

Manufacturers,    and 

Preferred   by   Expert 

Servicemen. 

• 

A  PROFITABLE  LINE 
TO  HANDLE 

TRIAD 

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INCORPORATED 

PAWTUCKET        RHODE  ISLAND 
The  Quality  Name  in  Radio  Tubes 


60 


SEiaiaj5Eiais/aMaisEEraEfSE(ajaEE,,sM0jai 
Radio   Today 


IN  TWO  PARTS 
•  PART  TWO* 


RADIO 
TODAY 


JANUARY 
•     1     9     3     8* 


BASIC   STATISTICS    OF   RADIO,   AS   OF   JANUARY  1,  1938 


UNCLE  SAM'S  ANNUAL  BILL  FOR  RADIO 


$12B;000,000 
40,000,000 

1  50,000,000 

450,000,000 

40,000,000 

47,000,000 

60,000,000 


Sale  of  time  by  broadcasters,  1937 

Talent  costs,  1937 

Electricity,  batteries,  etc.,  to  operate  31,000,- 

000  receivers 

7,700,000  radio  sets  sold  in  1937 

40,000,000  replacement  tubes 

Radio  parts,  supplies,  etc 

Servicing  radio  sets 

U.S.  Public  paid  for  radio  in  1937 $912,000,000 

RADIO  SETS  IN  USE 

Jan.  1,  1937  Jan.  1,  1938 

U.S.  homes  with  radios 24,500,000  25,800,000 

Extra  and  "second"  sets  in  above 

homes 4,500,000  6,000,000 

Automobile  radios  in  use 4,000,000  5,000,000 


Total  radio  sets  in  use,  U.S 33,000,000       36,800,000 


RADIO-SET  AND  TUBE  SALES,  FOR  YEAR  1937 

Number  Retail   Value 

Total  radio  sets  sold  durins  1937       7,700,000  $450,000,000 

Radio  Sets  exported 680,000    

Automobile  radios 1,800,000  90,000,000 

Home  radios  sold  in  U.S 5,220,000  304,000,000 

Consoles 2,100,000  167,000,000 

Table  models 3,000,000  1 20,000,000 

Combinations 70,000  11,000,000 

Home  sets  sold  as  replacements .  .        2,920,000  1 70,000,000 
Home  sets  sold    to    homes    pre- 
viously without  radios 1,300,000  75,000,000 

Home  radios  sold  as  extra  sets ...        1 ,000,000  58,000,000 

Battery  sets 900,000  45,000,000 

Tube  replacements 40,000,000  40,000,000 

Tubes,  initial  equipment 51,000,000  51,000,000 

Total  tubes  sold  1937  including 

exports 1 01 ,000,000   

Parts,  supplies,  etc 47,000,000 

Phonograph  records 31,000,000  16,000,000 


THE  FLOW  OF  DOLLARS  THROUGH  RADIO-912  MILLIONS  YEARLY 


RADIO  TODAY 


"C4- J 


3 


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3 


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6 

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AUDIBLE 

SPECTRUM 


middle  "c"-; 


14 


20 

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Y 
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S 

50 


100 


200 

256 


500 


1000 


2000 
c 

Y 
C 

L 
E 
S 

5000 


10000 


18000 


"THE    LONG   WAVES" 

30000 

=          BEGINNING   OF   THE 

RADIO 

20000 

SPECTRUM 

- 

M 

E 
T 
E 
R 
S 

— 

10000 

FIXED, 

_ 

GOVERNMENT 

— 

5000 

— 

3000 

4r 

5 

- 

FIXED, 

- 

— 

COASTAL  TELEG. 

2000 

SHIPS 

■:■;- 

STATE   POLICE 

M 

190  KC 

- 

E 

T 
E 
R 
S 

- 

ecu.  OOMM, 

208  ft  213  KC 

_ 

GOVERNMENT 

1000 

— 

AJRPORT  275~28tKC 
AtRCRAfT  329-339K0 

*mm 

RADIO  COMPASS 

— 

COASTAL  TELEG. 
:    AV1AT!Q« 

>       /;:^ 

MARITIME   a   DISTRESS 

00V  % 

10 


500 


200  I 


|50 

100 

150 
200 

H  300 

400 
^500 


K 
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L 
0 
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Y 
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1000 


„ 

MEDIUM  | 

150 

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HARB(: 

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POLK- 

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COASTAL  1 

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POLU 

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COAST.  HA 

100 

lililllit 

AVIATI 
COAS' 

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70 


50 


GOS 
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AM 


40 


GOK 


1600 


M 

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M 

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34 

gov'; 

SHIi 

le  Audible  and  Radio  Frequencies  and  Wavelengths, 
eluding    the    New    F.  C.  C.    Radio    Assignments. 


OV'T. 


mm 


OV'T      - 


a  GOV'T 

oVt 

HON 

.AY  B.C. 


GOV'T., 
•LEG., 

OMM. 


1600 


2000 


K 

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3000 


ILEG., 

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ELEO., 

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~ 

^^^^^m 

4000 


5000 


6000 


8000 


9000 


30  - 


FIXED 

n;m,i:'.\iM,'mm 


—  IOMC 


FIXED 


SHIP  a  COASTAL 
TELEG.TELEPH. 


FIXED 


25  - 


FIXED   GOVT  S 


AVIATION 


ULTRA    SHORT    WAVES' 


M 

E 
G 

A 
C 
Y 
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L 
E 
S 


I2MC 


I5MC 


_       FIXED, GOV'T  a 
AVIATION 


20MC 


25MC 


35MC 


GOV'T,  POLICE  a 
SPEC.  SERVICE 


1.5 


POLICE, 
SPEC. SERVICE 

BROADCAST       „ 


TELEVISION 


_ 


GOVERNMENT 


TELEVISION 


GOVERNMENT 


40  MC 


IOOMC 


AIRPORT   TRAF.  CONTROL 


GOVERNMENT      ~ 


I50MC 


= 


government    ««.  200 MC 


300  MC 


JANUARY   1938    ISSUE  OF 


RADIO 
TODAY 


C  OPTRIGHT-  1938 


DAniH       TftflAY     -    The  Audible  and  Radio  Freciuencies  and  Wavelengths 
Wlt\nJ  W\J         W     \J  MJ  F%    W  Including    the    New    FCC.    Radio    Assignments. 


=  1000 


2000 


5000 


10000 


18000 


"THE    LONG  WAVES 


-   SPECTR 


30000 


20000 

M 
E 
T 
E 
R 
S 


10000  ■ 

GOVERNMENT 


5000 


3000 


2000 


FIXED, 

"     COASTAL  TELEG. 

SHIPS 

STATE  POLICE 
IBOKC 


50 


100 


150 


i  200 


300 


400 


=  500 


1000 


1600 


150 


100 


1600 


2000 


AVIATION  8  GOV'T, 
COASTAL  TELEG., 

FIKED 
GENERAL  COMM. 


3000 


70  I 


GOVVSHIP, 
COASTAL  TELEG  , 
TELE*.  FIXED 
llON 


4000 


5000 


6000 


8000 


9000 


SHORT  WAVES" 


30 


25 


IOMC 


SHIP  8 COASTAL 
TELEG.XELEPH. 


FIXED 

li.'dUmH,'Mll- 
FIXED  GOVT  a 
AVIATION 


I2MC 


I5MC 


20MC 


25MC 


'ULTRA   SHORT    WAVES" 


rfENT 


GOVERNMENT 


40  MC 


IOOMC 


2.5  ■ 


AIRPORT  TRAF.  CONTROL 


3E 


I50MC 


GOVERNMENT 


!  200MC 

M 

E 
G 
A 
C 

Y 
C 

L 
E 
S 

1 300  MC 


JANUARY  1938  ISSUE  OF 


RADIO 
TODAY 


POLICE 

^35MC 


WHERE    1937    OUTPUT    OF    RADIO    SETS    WENT 


ROLL-CALL  OF  RADIO  INDUSTRY,  JAN.  1,  1938 

Manufacturers  of  radio  receivers 1 40 

Manufacturers  of  radio  tubes 14 

Manufacturers  of  radio  parts 625 

Manufacturers  of  test  equipment 60 

Manufacturers  of  broadcast  and  amateur  equipment.  .  .  110 

Manufacturers  of  sound  equipment 115 

Radio-set  and  parts  distributors 2,088 

Manufacturers'  agents 245 

Retail  outlets  selling  radios 61,000 

Dealers  doing  85%  of  radio  business 16,000 

Servicemen,  including  dealers'  servicemen 40,000 

Radio  amateurs  and  experimenters 81,000 

Broadcasting  stations,  Jan.  1,  1938 701 


SALES  OF  REPLACEMENT  PARTS,  1937 

At  Manufacturers'  Selling  Prices 

Transformers $1,700,000 

Condensers 1,750,000 

Vibrators 1,000,000 

Resistors 700,000 

Volume  Controls 360,000 

Speakers 350,000 

Service  Instruments  $4,300,000 


HOMES  WITH  RADIOS  BY  STATES 


SOUND  SALES,  1937 


Sound  Systems 

Intercommunicating  Systems. 
Microphones 


Units 

40,000 

50,000 

110,000 


Value 
J8,000,000 
2,000,000 
2,200,000 


ELECTRICAL  APPLIANCES,  SALES,  1937 

Units  Value 

Refrigerators 2,365,200  $400,000,000 

NX/ashing  machines 1,650,000  114,000,000 

Ranges 400,000  50,000,000 

Vacuum  cleaners 1,094,000  59,400,000 


Ala 291,000 

Ariz 70,600 

Ark 211,000 

Calif 1,580,000 


Colo. 
Conn. . 
Del...  . 
D.  C... 
Fla... 
Ga... 
Idaho . 

Ill 

Ind..  .  . 
Iowa. . 
Kan. . . 
Ky. . . . 
La...  . 
Maine . 
Md..  . 


233,000 
420,000 

53,000 
141,000 
263,000 
388,000 

85,300 
1,880,000 
696,000 
565,000 
392,000 
354,000 
293,000 
184,000 
360,000 
Mass 1,060,000 


Neb 300,000 

Nev 24,400 

N.  H 113,000 

N.J 1,010,000 

N.  Mex 54,500 

N.  Y 3,370,000 

N.  C... 384,000 

N.  Dak.. 130,000 

Ohio 1,570,000 

Okla 387,000 

Ore 244,000 

Pa 2,190,000 


Mich. 
Minn. 
Miss. . 
Mo... 
Mont. 


1,055,000 
602,000 
187,000 
795,000 
103,500 


R. 

s.  c... 

S.  Dak.. 
Tenn. .  . 
Texas. . 
Utah..  . 

Vt 

Va..  .  . 
Wash.  . 
W.  Va. 
Wise.  . 
Wyo. 


169,000 

196,000 

120,000 

370,000 

970,000 

95,900 

81,500 

344,000 

390,000 

270,000 

650,000 

50,000 

Total,  U.S 25,804,300 

Jan.  1,  1937  Jan.  1,  1938 

Total  homes  with  autos 18,000,000  18,500,000 

Total  residence  telephones 11,500,000  12,000,000 

Total  homes  with  electricity 21,800,000  22,500,000 

Total  homes  in  U.S 31,471,000  32,000,000 

Population  U.S 128,853,000  129,500,000 

RADIO  SETS  IN  USE 

Homes  with  radios,  extra  sets,  auto  radios 

1929 10,000,000  1933 22,000,000 

1930 13,000,000   1934 25,000,000 

1931 15,000,000   1935 28,000,000 

1932 18,000,000   1936 33,000,000 

1937 36,800,000 

NOTE:  Figures  on   radio-set  production   for  1937  subject  to  final   revision  on 
completion  of  official  4th  quarter  reports. 


CALDWELL-CLEMENTS,    INC.,    PUBLISHERS    OF    RADIO    TODAY,    480    LEXINGTON    AVENUE,   NEW    YORK,    N .  Y. 


.4%  

**  ELECTRIC  $ 

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At  $39.95  this  new  6-tube  Admiral  De  Luxe  Table 
Model  with  6-button  foolproof  motor  driven  tuning  is 
a  real  bargain.  Yet  it  is  priced  to  allow  you  an  extra 
generous  profit — you  can  offer  a  liberal  trade-in  allow- 
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tunity to  "step-up"  profits  now. 

Specifications:  Model  103-6B — 6-tube  AC  superhetero- 
dyne in  streamlined  de  luxe  two-tone  walnut  cabinet 
(18  in.  long,  l(Hi  in.  deep,  9  in.  high).  2  bands. 
Tunes  American  broadcast  and  19,  25,  31  and  -19 
meter  foreign  bands,  police,  amateur,  aviation,  ships 
at  sea.  Full  vision  6}|  in.  dial;  6-button  electric 
Touch-O-Matic  tuner;  6  in.  electro-dynamic  speaker; 
automatic  volume  control;  tone  control;  special  wave 
trap. 

Ask   Your  Jobber  or  Write  Us 

CONTINENTAL  RADIO 
&  TELEVISION  CORP. 

3800   W.   CORTLAND   ST.,   CHICAGO,  ILL 


A  PRICE  LEADER  TO  "BRING  'EM  IN"! 


Now  —  electric  toueh-o-matie  tuning  at  a  price  to 
keep  sales  sizzling  in  winter  months.  At  only  $29.95 
this  new  6-tube  Admiral  Table  Model  No.  102-6B 
in  handsome  walnut  cabinet  has  touch-o-matic  elec- 
tric motor  tuning.  Just  touch 
any  one  of  the  six  buttons  —  in 
conies  a  station  as  swiftly  and 
simply  as  switching  on  an  electric 
light.  Chassis  specifications  same 
as  No.  103-6B. 


$9095 


29 


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With  Manual 
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THE  HOTTEST  FEATURE  IN  AUTO  RADIO 


RADIO 
TODAY 


FEBRUARY 


In   Two  Pirti— Part  On« 


The  Sensational  Model  F-()6 


Now  Smashing 
Through  to  Still 
Greater    Success 


These  are  the  Features 
THAT  SHIFT  YOUR 
SALES    INTO    HIGH 

G-E  TOUCH  TUNING 

The  highest  development  in  auto- 
matic tuning.  Just  press  a  button — 
that's  all.  There  are  separate  buttons 
for  your  favorite  stations — all  at 
your  fingertips.  A  touch  of  your 
finger  and  there's  your  program — 
perfectly  tuned. 

G-E  LOUVER  DIAL 

It's  "as  easy 'to  read  as  a  ruler" — 
each  scale  calibrated  in  a  straight 
line — a  separate  scale  for  each  band. 

G-E  VISUAL  TONE  AND 
VOLUME  CONTROLS 

Enable  even  a  child  to  adjust  the 
receiver,  visually,  to  the  most  de- 
sirable level  for  a  station  or  program. 

G-E  TONE  MONITOR 

A  radio  circuit,  of  radical,  new  de- 
sign, that  corrects  tone  distortion. 
Enables  you  to  distinguish  the  full 
range  of  notes  of  every  instrument 
and  voice. 

G-E  "Custom-craft"  CABINETS 

Superb  custom  craftsmanship  in  de- 
tails of  construction,  acoustical 
design  and  selection  of  rich,  rare 
woods  and  veneers. 


Now  !  Mallory  offers  a  Complete  Condenser  Line  . . .  with  all 
the  features  that  have  made  Mallory  Condensers  famous. 
Surge-proof!  Humidity-proof!  Universal  mounting!  Smaller 
sizes !  Easier  installation !  See  your  Mallory- Yaxley  distribu- 
tor for  a  copy  of  the  new  Mallory  condenser  catalog  which 
gives  complete  information  on  all  the  new  condensers 
described  below. 


NFW  Tubular  PaPers 

The  addition  of  four  new  TP  condensers  with 
1,000  volt  ratings,  plus  a  number  of  new  units  in  the  lower 
voltage  range  make  the  Mallory  TP  line  more  attractive  than  ever. 

IV  F  W   Padding  and  Trimmer  Condensers 

All  are  made  with  the  finest  India  Ruby  Mica, 
and  are  designed  to  prevent  drift,  or  change  with  temperature 
or  moisture.  Adjusting  screws  are  equipped  with  fine  threads  for 
accurate  setting.  Available  in  four  general  types— both  single 
and  dual  units,  Bakelite  and  ceramic  bases. 

N  F  W  Auto  Radio  Types 

Condensers,  r.  f.  chokes  and  other  noise  sup- 
pression condensers— built  on  the  basis  of  Mallory "s  experience 
as  the  pioneer  manufacturer  of  vibrators  and  vibrator  power 
supplies.  INot  a  single  make-shift  adaptation  among  them — each 
is  specifically   built  for  its  intended  applications. 


Transmitting  Condensers 


NEW 

^~^  '  '  Two  new  types,  incorporating  a  new  impregnat- 
ing compound  which  has  many  advantages  over  the  usual  wax 
or  oil  impregnations.  The  compound  has  a  high  dielectric  constant 
and  insulation  resistance  that  make  possible  the  relatively  small 
sizes  of  these  condensers.  These  high  voltage  condensers  are  ideal 
for  use  in  radio  transmitter  power  supplies  and  for  heavy  duty 
power  amplifier  service. 

IV  ¥?  ~W  M*ca  Condensers 

-1-  '  -*"^  *  *  Compact,  mechanically  strong  and  moisture- 
proof.  Made  of  the  finest  grade  of  clear  India  mica. 

IV  17  W   Cased  By-Pass  and  Uncased 
1 1  Jj  TT         Condensers 

An  example  of  the  completeness  of  the  Mallory  line  is  the  intro- 
duction of  new  type  CB  cased  by-pass  condensers  and  tvpe  UB 
uncased  dielectric  filter  condensers. 


NOW!  WHAT  WILL  MALLORY- YAXLEY  DO  NEXT? 

Watch  for  further  important  announcements  ! 


P.  R.  MALLORY  &  CO.,  Inc 
INDIANAPOLIS  INDIANA 

Cable  Address— PELMALLO 


RADIO  TODAY,  February.  1938,  Vol.  IV,  No.  2,  published  monthly  by  Caldwell-Clements.  Inc.,  480  Lexington  Ave.,  New  York.  N.  Y.  Subscription 
yearly  $1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24, 
1936,  at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,    1879.      Printed    in    U.  S.  A.       Copyright     1938     by     Caldwell-Clements,     Inc. 


It's  always  "smooth  sailing"  when  you 
sell  Sylvanias.  For  Sylvania  is  one  tube 
line  that  protects  your  repeat  business. 

To  keep  your  business  on  a  solid,  "repeat 
sales"  foundation,  you  must  always  give 
customers  full  satisfaction . . .  their  money's 
worth  on  every  item  they  buy. 

One  of  the  surest  of  all  customer-satis- 
fiers  is  Sylvania  radio  tubes.  The  scores  and 
scores  of  tests  which  Sylvanias  undergo 
during  manufacture  is  positive  insurance 
against  "duds".  And  for  your  added  pro- 
tection, Sylvania  tubes  are  sold  with  a  6- 
month  written  factory  guarantee  packed 
right  in  the  carton. 

For  a  smooth-sailing,  repeat  business, 
keep  your  tube  customers  satisfied  —  sell 
them  Sylvanias! 


Radio  Today 


RCA  Victor  Electric  Tuning 
Table  Model  87T-2.  Brings 
Electric  Tuning  to  the  thou- 
sands who've  wanted  it  — 
but  couldn't  afford  it!  Just 
push  a  button — and  any  one 
of  six  favorite  stations  is 
tuned  as  quick  as  a  wink!  In 
addition  to  Electric  Tuning, 
this  instrument  provides 
such  other  extra  value  fea- 
tures as  famous  Magic  Eye, 
RCA  Metal  Tubes,  Straight- 
Line  Dial,  Beauty-Tone  Cab- 
inet, Phonograph  Connec- 
tion,and  manymore.  Asales 
WOW  with  a  capital  "W"! 


RCA  presents  the  "Magic  Key': 

every  Sunday,  2  to  3  P.  M., 

E.S.T.,  on  the  NBC  Blue 

Network 


FOR  the  first  time  — RCA 
Victor  Electric  Tuning  — 
in  a  table  model!  Here's  a 
spectacular  new  value  that 
will  bring  you  more  and 
greater  sales  and  profits — a 
radio  set  with  the  year's  most 
sensational  development  that 
sells  for  only  $69-95*. 

(*F.O.B.  Camden,  N.J.,  subject  to  change) 


MFSAID! 


A  SERVICE  OF  RADIO  CORPORATION  OF  AMERICA    •    RCA  MFG.  CO.,  INC.,  CAMDEN,  N.  J. 


OVER  300  MILLION 


RCA  RADIO  TUBES  HAVE  BEEN  PURCHASED  BY  RADIO  USERS. 
IN  TUBES,  AS  IN  RADIO  SETS,  IT  PAYS  TO  GO  RCA  ALL  THE  WAY 


February,  1938 


S^\  LARGE  volume  of  this  year's  radio 
C!u  purchases  will  be  made  by  peo- 
ple with  whom  I  stand  high.  I  can 
influence  many  of  them  in  your  favor. 
That's  why  it  should  be  important  to 
you  to  know  me  better  ...  to  know 
all  the  advantages  you  get  when  I 
am  working  with  you   and  for  you. 

Millions  of  families  have  bought  auto- 
mobiles, refrigerators,  home  laundry 
equipment  and  other  electric  appli- 
ances on  the  Commercial  Credit  Com- 
pany time  payment  plan.  They 
have  first  hand  knowledge  of 
the  fair  and  friendly  treatment 
they  get.  When  you  offer  them 
this  same  service  in  the  finan- 
cing of  a  radio  you  have  their 
confidence  and  good  will  from 
the  start. 


Back  of  the  scenes  is  the  machinery 
that  is  of  vital  importance  to  you  .  .  . 
careful  credit  investigation  to  prevent 
risky  sales— speedy  remittance  of  your 
money— an  effective  but  frictionless 
collection  system  that  relieves  you  of 
worry  or  embarrassment. 

With  my  help  on  the  credit  and 
financial  side,  you  will  be  free  to 
concentrate  on  selling  and  merchan- 
dising. That's  your  main  job.  That's 
where  your  profits  come  from. 


JL 


REFRIGERATORS  RANGES 
HEATING  i  AIR  CONDITIONING 
EQUIPMENT     ELECTRICAL 

APPLIANCES 


I'm  the  local  manager  for 
Commercial  Credit  Company. 
I  have  headquarters  in  205 
offices  in  the  principal  cities 
of  the  United  States  and  Can- 
ada. .  .  .  Call  on  me  freely  for 
information  and  help. 


COMMERCIAL  CREDIT   COMPANY 


COMMERCIAL  BANKERS 
CONSOLIDATED  CAPITAL 


HEADQUARTERS:    BALTIMORE 
AND  SURPLUS  $64,000,000 


SERVING  MANUFACTURERS,  DISTRIBUTORS  AND  DEALERS  THROUGH  205  OFFICES  IN  THE  UNITED  STATES  AND  CANADA 


Radio  Today 


THE  TUBE  WITH  THE 
BEST- KNOWN  NAME 


\ 


to  Hie  EASIEST 

TO  SELL/ 


OVER  TEN  MILLION  PHILCO  RADIOS 
have  been  sold.  No  other  radio  in  all 
the  world  has  ever  remotely  approached  that 
record!  Every  time  anyone  switches  on  one  of 
these  sets  . . .  changes  a  station  .  .  .  increases 
or  decreases  the  volume  . . .  the  name  PHILCO 
is  bound  to  catch  his  eye. 

To  these  millions  .  .  .  and  to  the  added  mil- 
lions who  know  PHILCO  through  newspaper, 
magazine  and  broadcast  advertising  . . .  PHILCO 
is  the  best-known,  most  important  name  in 
radio.  That's  why  PHILCO  on  a  tube  carton 
means  an  instant  sale.  They  know  that  name, 
respect  that  name  .  .  .  and  have  added  respect 
for  the  store  that  gives  them  the  tube  with  the 
name  that  means  most  to  most  people  .  .  . 
PHILCO! 


MEANS  PROFIT  TO  YOU! 


. . .  because  it  offers 


MAILING  CAMPAIGNS  that  bring  more  cus- 
tomers into  your  store — colorful  window  dis- 
plays that  attract  the  attention  of  prospective  customers 

—  promotional  pieces  that  identify  you  as  a  reliable 
RCA  Dealer — these  are  only  a  few  of  the  sales-aids  now 
available  to  RCA  Radio  Tube  dealers. 

Add  to  this  the  RCA  Radio  Check-Up  Program — a 
plan  originated  and  developed  by  RCA — one  which  has 
brought  thousands  of  dollars  to  alert  dealers  all  over 
the  country — that's  why  RCA  means  profit  to  you. 

The  window  display  shown 
above  is  lithographed  in  eight 
attractive  colors  and  is  the  first 
in  the  New  1938  Window  Dis- 
play Service. 

Ask  your  local  RCA  Distrib- 
utor how  you  can  obtain  this 
new  service  FREE  —  it  will  pay 

—  in  profits. 

OVER  THREE  HUNDRED  MILLION  RCA  RADIO  TUBES  have  been  purchased  by  radio  users 
...in  tubes,  as  in  radio  sets,  it  pays  to  go  RCA  All  The  Way. 


Radio  Today 


sxosisy  sramy  jmm 


THE 
GREATEST 


STORY    EVER  TOLD 


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THIS  MUCH  1& 

IN  A    1 


sr#»&,0S 


None   but   the   Shelvador   electric   refrigerator   provides 

„r    ,:mp    and    labor-saving    leatures 
such   an    array    of    W^^    to    (iie    house- 
features    that    spell    CONVtN    ,     ..Th.Greatest  Sales 

•r„  that  tell  her  convincingly      1  he  l,reaiest  ^ 

W  Story  Ever  Told'-THIS  MUCH  MORE  IN  A 
IhFLVADOR  .  •  that  will  sell  for  you  many 
SHEJ^; gators  than  you've  ever  sold  before. 

THE  CROSLEY  RADIO  CORPORATION,  CINCINNATI 

'  POWEL  CROSLEY.  Jr.,   Pre.ident 


of "the  Natl 


5Lfc.Y,  Jr..    r"""""  ,.    . 

i"-'WLW-500,000  walts-70  on  your  dial . 


CROSLEY  SHELVADOR 


February,  1938 


A  RADIO  BUSINESS 
THAT  REACHES  ITS  PEAK 
IN   THE   SPRING    MONTHS 


HARRY  BOYD   BROWN 

National  Merchandising 
Manager  of  Pbilco 


o 


VER  20  million  automobiles — not  equipped  with  radio — are 
in  operation  in  the  United  States  today.  And  it  is  estimated 
that   2,500,000  new  cars — not  equipped  with  radio  by  either  car 
manufacturer  or  car  dealer — will  be  delivered  to  buyers  in  1938. 

Automobile  Radios — a  tremendous,  unsaturated  market  for  Philco  radio 
dealers!  A  business  that  reaches  its  peak  in  the  Spring  months — retail  sales  that 
certainly  help  keep  the  radio  dealer's  business  on  a  steady  even  keel  the  year 
around. 

Better  still,  Philco  Auto  Radios  sell  Philco  Home  Radios,  and  Philco  Home 
Radios,  in  turn,  bring  auto  radio  sales.  One  hand  washes  the  other.  And  re- 
member, the  American  public  has  bought  over  10  million  Philco  Home  Radios. 
This  means  millions  of  satisfied  Philco  Home  Radio  owners  that  constitute  a 
vast,  nation-wide  market  for  Philco  Auto  Radio. 

And  now — only  $24.95  for  a  PHILCO  Automobile  Radio!  The  model  920 — 
quality  and  beauty — without  question  the  greatest  auto  radio  value  ever  built. 
Remarkable  power!  Superb  clarity  of  tone!  Amazing  performance!  The  adver- 
tising leader,  the  big  volume  number  of  Philco's  marvelous  new  auto  radio 
line  for  1938. 

The  public  demands  performance  as  well  as  price  in  auto  radio  today.  And 
the  Philco  model  920  gives  you  real  sensitivity — remarkable  ability  to  get 
stations.  And  also  real  selectivity — which  means  no  interference — no  cross  talk. 
A  5 -tube  auto  radio  with  3 -Gang  Condenser — Electro-Dynamic  Speaker — Full 
Wave  Vibrator — Automatic  Volume  Control.  Furthermore,  no  Spark  Plug 
Suppressors  are  necessary,  and  installation  is  easy,  speedy,  surprisingly  simple. 
No  one  on  earth  but  Philco  could  build  this  radio  to  sell  for  $24.5)5. 

Then  when  it  comes  to  "selling  up" — Philco's  new  auto  radio  line  fits'  the 
selling  situation  perfectly.  Four  splendid  models — priced  in  easy  logical  steps 
from  $24.95  to  $59.95 — added  features — added  beauty — more  power — more 
distance  range — and  still  more  marvelous  performance. 

Every  Philco  Auto  Radio  model  has  its  own  properly  matched  and  properly 
tuned  Philco  aerial  in  any  type  you  need  for  any  model  car.  Cowl  aerials,  under- 
car  aerials  or  rooftop  aerials — each  designed,  matched  and  tuned  to  the  particu- 
lar Philco  model.  And  for  those  radio  dealers  who  do  not  have  the  facilities  for 
installation,  Philco  covers  the  United  States  with  over  1500  Authorized  Service 
Stations  to  install  and  service  Philco  Automobile  Radios. 


PHttC 


Radio  Today 


©C1B    369103 

FEB  18  1938 


Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
J.  E.  Neary,  Jr. 
M.  H.  Newton 
B.  V.  Spinetta 
Vinton    K.    Ulrich 


Lee    Robinson 

Sales    Manager 


Orestes     H.     Caldwell 

Editor 


M.    Clements 
Publisher 


Copyright   1938 

Caldwell-Clements.  Inc. 

480    Lexington    Ave. 

Xew   York,    N.    V. 

Tel.   PLaza  3-1340 

Vol.   IV,   Xo.  2. 


OPTIMISM  &  CONFIDENCE,  INC. 

*  Fairly  certain  it  is  that  Ameri- 
can business  intends  to  brush  past 
such  pessimists  as  are  still  concerned 
with  a  recession.  Business  conditions 
rest  delicately  upon  a  national  state 
of  mind,  for  one  thing,  and  recent 
surveys  are  indicating  that  this  state 
of  mind  has  emerged  from  the  dumps. 

George  Gallup  of  the  American 
Institute  of  Public  Opinion  has 
checked  up  on  the  mood  of  the  popu- 
lation and  has  found  it  jolly;  78  per- 
sons out  of  every  100  say  that  they 
expect  business  to  be  better  within 
the  next  six  months.  Last  December, 
only  58  were  similarly  optimistic. 

Colby  Chester,  General  Foods  chair- 
man, has  also  charted  some  opinion. 
He  surveyed  40  large  manufacturers 
and  two-thirds  of  them  said  yes,  they 
expected  an  upturn  this  year. 

Radio,  blessed  with  a  string  of  new 
products  and  assorted  hew  develop- 
ments, may  herewith  take  a  tip  from 
others  who  are  willing  to  exhibit 
some  cheer. 


URGE  REPEAL  OF  RADIO 
EXCISE  TAX 

*  A  vigorous  campaign  in  Con- 
gress for  the  repeal  of  the  Federal 
radio  excise  tax  of  5  per  cent  now 
imposed  on  all  receiving  sets  (except 
auto-radios,  which  are  taxed  as  auto 
accessories)  is  being  conducted  by 
Bond  Geddes,  executive  vice-presi- 
dent of  the  Radio  Manufacturers  As- 
sociation. 

Enlistment  of  the  entire  radio 
trade,  distributors,  dealers,  service- 
men, and  broadcasters,  is  being  under- 
taken, to  write  letters  to  their  Con- 
gressmen and  to  the  members  of  the 
House  Ways  and  Means  Committee 
and  the  Senate  Finance  Committee, 
addressed  at  "TJ.  S.  Capitol,  Wash- 
ington, D.  C."  urging  repeal  of  the 
radio  tax  by  virtue  of  the  great  pub- 
lic service  rendered  by  radio. 


NINE-TENTHS  OF  CAR  RADIOS 
INSTALLED  LOCALLY 

*  Auto-radio  sales  are  going  up 
each  year,  and  for  the  twelve  months 
of  1937,  probably  1,800,000  auto-sets 
were  sold  and  installed.  A  round  mil- 
lion of  these  sets  were  sold  through 
the  automobile  trade,  along  with  the 
cars,  but  only  a  small  part  of  this  mil- 
lion, about  15  per  cent,  were  actually 
installed  at  the  factory,  as  shown  by 
the  adjoining  chart.  The  other  85  per 
cent,  or  850,000  auto-sets,  were  in- 
stalled by  auto  distributors  and  deal- 
ers in  the  territory  where  the  eventual 
sale  was  made!  Here  is  a  big  instal- 
lation business  which  local  radio  men 
can  get — in  addition  to  the  "separate- 
sale"  market  of  800,000  auto-radios 
sold  to  car-owners  for  "after-installa- 
tion" on  their  cars. 

Last  year  nearly  3,000,000  cars  were 
sold  without  radios,  and  many  of  these 
owners  are  prime  prospects  for  auto- 
radio  now  in  1938  when  people  may 
be  making  less  outlay  for  new  cars, 
but  want  to  modernize  their  old  ones. 

Car-owners,      men      and      women ; 


young  people;  car  distributors;  used- 
car  dealers;  garage  operators,  repair- 
men and  gas-station  men,  are  all  pros- 
pects to  sell  to  or  work  with — in  going 
after  this  rich  auto-radio  market. 

TO  HELP  SELL  UP- 
SEE  PART  TWO 

*  With  a  number  of  new  low- 
priced  table  models  announced  at  this 
time,  Radio  Today  feels  that  these 
sets  open  up  an  additional  market  as 
"extra  radios"  in  the  home. 

But  every  home,  we  think,  should 
have  at  least  one  quality  console  to 
reproduce  the  great  music  on  the  air. 
To  aid  dealers  in  shaping  up  their 
selling  arguments  for  both  quality 
consoles  and  extra  small  radios,  the 
editors  have  prepared  the  material 
which  appears  as  Part  Two  of  this 
issue,  designed  to  show  that  while 
every  home  can  use  extra  small  sets, 
only  a  quality  console  will  enable  the 
family  to  enjoy  fully  the  great  pro- 
grams of  modern  broadcasting. 


February,  1938 


Ralph  J.  Cordiner,  who  becomes  new 
manager  of  GE's  appliance  and  mer- 
chandise  dept. 

FLOURISH  FOR  FARM  RADIO 

*  At  least  one  gentleman  emerged 
from  1937  on  top  of  the  heap.  The 
farmer  enjoyed  bumper  crops,  strong 
prices  and  considerable  cash  benefit 
from  Washington.  Dept.  of  Agricul- 
ture estimates  that  the  total  income 
to  U.S.  farmers  during  the  year  was 
$8,500,000,000— the  largest  since  the 
peak  in  1929.  The  figure  in  1936  was 
$7,920,000,000. 

Of  the  6,800,000  farms  in  the  coun- 
try, about  4,000,000  are  still  without 
radios.  There,  declares  Philco's  Sayre 
M.  Eamsdell,  "is  the  biggest  single 
market  for  radio  in  the  United 
States." 

Meanwhile,  the  broadcasters  fenagle 
for  more  farm  interest.  Since  Jan. 
3,  the  National  Farm  and  Home  Hour 
on  NBC  has  been  a  coast-to-coast  fea- 
ture, adding  15  stations  on  that  date, 
and  bringing  the  total  to  93. 


FINGERPRINTS  FOR  SALESMEN 

*  Metropolitan  areas  where  radio 
and  refrigerator  dealers  cluster  thick- 
ly, are  up  against  the  condition  by 
which  outside  salesmen  sign  up  with 
more  than  one  dealer.  In  a  Brooklyn 
case,  a  single  salesman  was  found 
to  have  three  regular  weekly  draw- 
ing accounts  with  three  different  deal- 
ers, and  was  putting  his  "sales" 
through  whichever  dealer  offered  him 
the  highest  compensation  on  the  par- 
ticular article! 

So  serious  has  this  racket  become 
that  dealers  are  now  attempting  to 
work  out  a  system  of  salesman  iden- 
tification with  the  finance  companies. 
By  this  plan,  each  salesman  will  carry 
a  card  with  his  photograph  stamped 
on  it,  while  his  current  dealer  affilia- 
tion, personal  record,  etc.,  will  be  filed 
in  a  central  bureau  where  any  dealer 
may  consult  it  before  taking  on  a  new 
man. 

"'If  identification  portraits  do  not 
work,  finger-printing  of  salesmen  will 
be  the  next  step,"  declare  the  harassed 
dealers. 

APPLICANT  TEACHERS' 
VOCES  RECORDED 

*  Large-scale  use  of  recording 
machines  has  made  its  appearance  in 
a  new  branch  of  the  educational  field. 
In  New  York  City,  the  oral  examina- 
tions which  are  given  applicant  teach- 
ers will  all  be  recorded  this  season. 
City  education  officials  recently  voted 
$1,500  to  experiment  with  the  appara- 
tus, and  according  to  Dr.  Joseph  K. 
Van  Denburg,  chairman  of  the  Board 
of  Examiners,  recorded  voices  of  all 
applicants  will  be  filed  along  with 
other   Examiner's   data. 

Stunt  is  expected  to  improve  speak- 


Clarostat's  Vic.   Mucher,   chairman   of   RMA's   committee   on   variable   resistors, 
shows  a  trick  or  two  to  H.  L.  Dalis  and  Adolph  Langer,  of  H.  L.  Dalis,  Inc. 

10 


Ros  Howard,  who  took  a  trainload  of 

RCA   Chicago   dealers   to   Hollywood, 

is  welcomed  by  Jack  Benny. 

ing  habits  of  teachers.  Also,  officials 
will  be  in  position  to  confront  appli- 
cants with  actual  reproductions  of 
their  voices.  The  plan  is  to  use  a 
separate  record  for  each  applicant, 
both  men  and  women. 

This  announcement  from  New  York 
points  directly  to  the  importance  of 
recorders  in  any  spot  where  the  cul- 
tivation of  the  human  voice  is  con- 
cerned. 

BROADCASTS  IN  FRONT 

*  Each  day  at  noon,  pedestrians 
in  Miami,  Fla.,  are  attracted  in  large 
numbers  to  novel  broadcasts  in  front 
of  radio  dealers'  stores.  The  stunts 
are  arranged  by  H.  A.  ("Herb") 
Brennan,  of  Major  Appliances,  Inc., 
RCA  distributors. 

In  a  search  for  something  entirely 
different  to  attract  attention  to  1938 
models,  Mr.  Brennan  arranged  with 
the  local  NBC  station  to  spot  outside 
broadcasts  directly  in  front  of  where 
dealers  were  displaying  the  new  sets. 
Staged  at  a  time  when  many  business 
folk  were  having  their  lunch  hour, 
the  device  stopped  hundreds  of  pros- 
pects at  a  time. 

"MAGIC-EYE"  IN  COLORS! 

*  An  ingenious  cathode-ray  tun- 
ing indicator  which  indicates  reso- 
nance by  means  of  different  colors,  is 
covered  by  U.S.  Patent  No.  2,098,231, 
issued  Nov.  9,  1937,  to  Allen  B.  D'u 
Mont,  Upper  Montclair,  N.  J.  This 
latest  indicator  calls  for  a  plurality 
of  fluorescent  screens  glowing  in  dif- 
ferent colors  as  the  cathode-ray  im- 
pinges upon  them.  The  cathode-ray 
beam,  swung  over  different  sections  of 
the  screen  by  deflection  plates,  indi- 
cates resonance  or  other  desired  func- 
tion in  different  colors. 


Radio  Today 


VELLY  FINE  MARKET 

*  Japanese  bombs  are  not  the 
only  items  in  the  Chinese  skies. 
There  are  plenty  of  radio  signals, 
too,  now  that  broadcasting  has  be- 
come such  an  important  part  of  the 
battle. 

Eeports  received  from  the  Far  East 
by  Walter  S.  Cranmer,  Philco  ex- 
port manager,  indicate  that  radio  in- 
terest has  taken  a  leap  among  the 
Chinese  masses.  In  spite  of  the  up- 
roar, the  receiver  market  flourishes. 
Newspapers  are  censored,  so  that 
broadcast  news  is  at  a  premium,  and 
propaganda  is  scattered  abundantly 
about.  The  population  has  become 
sharply  radio-conscious. 

When  the  gunfire  quiets  down, 
some  80,000,000  Chinese  will  be  radio 
prospects,  according  to  Mr.  Cranmer. 
The  total  population  is  about  400,- 
000,000,  but  only  about  20  per  cent 
have  sufficient  purchasing  power. 


PARTS  SHOW,  CHICAGO,  JUNE  8-11 

*  Especial  attention  is  called  to 
the  fact  that  the  1938  National  Radio 
Parts  Trade  Show  will  open  at  the 
Stevens  Hotel,  Chicago,  Wednesday, 
June  8,  and  close  on  Saturday  eve- 
ning, June  11.  The  show  period  does 
not  include  a  Sunday,  as  in  the  past. 
This  arrangement  was  agreed  upon  by 
the  directors  to  enable  distributors, 
representatives,  exhibitors,  and  others 
to  utilize  Sunday  for  travel,  so  that 
they  can  be  back  home  for  business 
Monday  morning. 

The  Exhibition  Hall  in  the  Stevens 
will  be  laid  out  as  a  city,  to  be  known 
as  Eadio  Parts  City.  Each  street  will 
be  named  in  honor  of  a  deceased  out- 
standing figure  in  the  development  of 
radio,  such  as  Marconi,  Ampere,  Edi- 
son, and  so  on.  Over  100  booths  have 
already  been  contracted  for. 


INTERNATIONAL  RADIO  HUDDLE 

*  At  Sydney,  Australia,  come 
April  4,  there  opens  a  world-wide 
radio  convention  "to  discuss  all 
phases  of  radio  engineering."  Unlike 
other  events  of  this  kind,  where  allo- 
cation matters  have  been  the  chief 
topic,  this  convention  will  concern 
wave  propagation,  telecommunication, 
broadcast  transmission,  broadcast  re- 
ceivers, sound  projection,  electro- 
medical, television,  general  and  allied 
subjects. 

The  huddle  is  sponsored  by  the  In- 
stitution of  Eadio  Engineers  (Aus- 
tralia), of  which  Sir  Ernest  Fisk  is 
the  president ;  sessions  will  be  held 
at  the  University  of  Sydney. 


Motorola  "chefs"  at  recent  jobber  convention.    Left  to  right,  behind  the  shrubbery, 
Walt  Stellner,  Carl   McKelvey,  Vic   Irvine,   Elmer  Wavering. 


CANADIAN  SALES 

*  Total  receiving-set  sales  in  1937 
in  Canada  were  264,209  sets,  with  a 
list  value  of  $22,691,150,  according 
to  the  reports  of  the  Canadian  RMA, 
and  including  December  sales  of  26,- 
984  sets,  valued  at  $2,193,819.  The 
Canadian  sales  in  1936  were  248,191, 
valued  at  $22,233,329.  Of  the  1937 
sales,  169,564  were  AC  sets,  valued 
at  $16,992,337;  71,476  battery  sets, 
valued  at  $4,402,084,  and  23,169 
automobile  sets,  valued  at  $1,296,734. 
There  was  no  substantial  increase  in 
the  AC  or  battery  sets,  but  the  1936 
automobile  sets  were  18,711  receivers, 
valued  at  $1,146,371.  Canadian  in- 
ventories, including  stocks  in  hands 
of  jobbers  and  branches  on  December 


31  last,  were  67,399  sets,  as  against 
a  similar  inventory  of  39,017  in  De- 
cember, 1936. 

GRANTS  RMA  REQUEST  FOR 
INTERMEDIATE  FREQUENCY 

*  The  Federal  Communications 
Commission  has  adopted  a  request 
from  EMA  for  establishment  of  the 
frequency  455  KC.  as  a  protected  in- 
termediate frequency  for  the  radio 
set  manufacturing  industry.  The 
Commission  will  endeavor  to  protect 
this  frequency,  set  aside  in  the  man- 
ufacture of  receiving  sets,  by  not 
authorizing  any  new  frequency  as- 
signments in  the  band  from  450  to 
460  KC. 


J-  J-  (Jack)  Ross,  president  Detrola  Corp.,  and  Mrs.  Ross,  snapped  on  the  Isle  de 
France  enroute  for  Europe,  during  their  recent  successful  trip. 


February,  1938 


11 


FOUR  THOUSAND 
RADIO  DEALERS 
WRITE: 
/#DEAR  EDITOR-" 


DEALER  VOLCANO  ERUPTS 

Thousands  demand  price  protection;    ask    for    action    on    trade-ins. 
Want  more  quality,  fewer  gadgets;  more  sales  help,  fewer  outlets. 


*  BUSINESS  men— big  and  little 
— journeyed  to  Washington  this 
month  to  speak  their  minds  bitterly 
on  what's  the  matter  with  business, 
and  what  ought  to  be  done  about  it! 

Meanwhile  radio  business  men — 
large  and  small — have  been  having  an 
eruption  of  opinion  of  their  own, 
pouring  thousands  of  letters  into  the 
office  of  Radio  Today,  to  present  the 
plight  of  the  radio  dealer,  and  to  re- 
port in  blistering  terms  on  the  evils 
which  beset  our  one-time  happy  trade. 

Loudly  and  angrily,  some  4,000 
radio  dealers  are  telling  Radio  Today 
that  "we  dealers  are  behind  the  eight 
ball !" 

Writing  letters  in  which  a  spade  is 
called  a  spade,  radio's  merchandisers 
report  that  the  trade  is  in  complete 
confusion. 

Dealers  are  demanding  a  showdown. 
They  are  bewildered,  fed  up  and  alto- 
gether impatient.  They  bristle  with 
complaints  and  they  are  thoroughly 
sick  of  the  senseless  mix-ups  into 
which  the  trade  has  blundered. 


Dealers  are  unable  to  face  the  pub- 
lic with  any  assurance.  Their  mer- 
chandising they  say,  is  shifty,  and 
standards  of  marketing  have  disap- 
peared. All  the  steps  they  take  are 
the  wrong  ones.  Decent  returns  are  no 
more. 

Standards  missing 

Specifically,  retailers  are  asking  for 
year-long  prices  and  a  chance  to  re- 
build public  faith  in  the  radio  price 
structure. 

They  dislike  the  practice  of  taking 
in  old  sets  at  current  allowances,  un- 
less they  get  extra  help  in  the  disposal 
of  the  obsolete  receivers. 

Dealers  want  new  merchandise 
which  will  have  the  genuine  effect  of 
outmoding  the  older  receivers. 

They  want  more  assistance  in  ad- 
vertising and  promotion,  and  they 
suggest  more  appropriate  forms. 

Dealers  also  vote  in  great  numbers 
for  fewer  models  in  each  line. 

In    detail,    and    from    most    of    the 


states    of    the   Union,    representative 
opinions  are  listed  herewith. 

Price  Control 

Starting  with  the  sentiments  of  an 
Oregon  dealer,  as  to  what  the  trade 
leaders  should  do:  "Cut  out  the  fancy 
stuff  and  make  a  set  to  sell  at  one 
price  all  season  and  not  50%  less  in 
60  days." 

Indicating  conditions  in  Chicago: 
"I  can  purchase  over  the  counter  here, 
at  .retail,  tax  included,  any  model  set 
desired  at  lower  prices  than  from  lists 
at  net  dealer  prices." 

Also  from  Illinois:  "A  product 
should  be  worth  the  price  you  ask  for 
it,  without  giving  away  a  bathtub  or 
a  house  with  it,"  and  "Stop  industry, 
selling  by  dealers,  jobbers  and  manu- 
facturers." 

Two  Michigan  dealers  point  out  that 
"Lower  prices  jeopardize  past  time 
payment  sales,"  and  that  the  industry 
should  "Stop  borax  dealers  from  sell- 
ing standard  radios  at  50  to  60%  ott." 

A  New  York  radio  man  thinks  that 
"Manufacturers  should  learn  how  to 
conservatively  manufacture  and  dis- 
tribute." 


12 


Radio  Today 


From  Ohio  comes  the  observation: 
"To  inspire  dealer  confidence  to  go 
after  sales  that  can  be  made,  we  need 
price  stabilization  and  elimination  ot 
cut-throat   practices." 

A  Wisconsin  idea  is  that  the  in- 
dustry should  "Educate  the  public 
that  it  is  economically  impossible  to 
merchandise  a  10  to  14-tube  radio  for 
$40  or  $50  and  give  true  value." 

Another  remark  from  the  same  state: 
"Shoot-to-kill  all  chiselers,  who  under- 
mine public  faith  in  all  industries." 

Utah  registers:  "By  cutting  price, 
business  is  actually  lost  because  people 
can't  make  up  their  minds  what  they 
want." 

A  Texas  dealer  sees  a  solution — 
"Have  a  special  line  to  compete  with 
mail   order   and    chain   stores." 

A  lively  question  comes  from  a 
Florida  store:  "Did  you  ever  hear  of 
Mr.  Brown  buying  a  radio  at  cost 
through  a  friend,  Mr.  Jones,  who  is 
connected  with  the  Who-Zit  Construc- 
tion Co.,  just  because  said  company 
buys  $30,000  worth  of  materials  per 
year  from  a  radio   distributor?" 

A  Tennessee  shop  has  a  plan: 
"Pass  a  law  to  make  anyone  (othei 
than  a  dealer)  pay  a  radio  franchise 
license  who  buys  at  wholesale." 

Revision  is  requested  by  a  Missouri 
dealer:  "Reduce  the  usual  40  and  50% 
discount  to  20  or  25%.  This  is  a  dras- 
tic step  unless  engaged  in  by  all,  bui 
after  all,  appliances  can  be  sold  at  this 
discount  profitably." 

To  open  with  a  brisk  statement  from 
New  Jersey:  "Stop  being  so  damn 
jittery  at  the  least  cause.  Put  a  high 
enough  list  on  every  model  so  a  fixed 
trade-in  can  be  allowed.  90%  of  all 
bu\-ers  have  sets  for  trade." 

A  similar  idea  comes  from  Iowa, 
that  manufacturers  should  "Pad  the 
list  price  to  that  a  dealer  can  give  a 
fair  trade-in  on  a  used  radio." 

A  California  dealer  says,  "Have  local 
distributors  set  up  a  fund  so  that  a 
dealer  would  be  able  to  realize  a  cer- 
tain amount  for  any  old  radio.  These 
would  be  destroyed  by  the  distributor." 


A  different  angle  from  Ohio:  "Have 
a  built-in  trade-in  allowance.  Now 
that  such  big  trade  allowances  have 
been  given,  the  public  expects  it  on 
any  make  or  model." 

Plans  for  definite  financial  assistance 
are  mentioned  in  Delaware:  "Build  up 
a  junk  fund.  Allow  dealers  a  certain 
junk  price  for  each  new  model — simi- 
lar to  that  used  in  the  auto  industry." 

A  related  suggestion  comes  from 
New  York — "Allow  us  $15  or  $20  for 
trade-in  on  a  $100  console.  Trade-ins 
are  our  chief  trouble.  Profits  all  tied 
up  in  second-hand  machines  which  are 
hard  to  sell  for  anywhere  near  the 
allowance  made  for  them." 

A  Wisconsin  dealer  submits  some 
dope  on  selling  in  smaller  towns:  "Get 
people  to  trade  in  their  sets  before 
they  get  so  old  there  is  no  resale  value. 
This  could  be  done  by  getting  dealers 
to  refuse  to  consider  a  trade-in  over 
5  years  old.  In  the  smaller  towns 
most  people  keep  their  old  sets  about 
10  years." 

"Eliminate  from  advertising  all  de- 
finite naming  of  trade-in  allowances," 
says  a  radio  man  in  Rhode  Island. 

Another  letter  from  Ohio  reads: 
"Provide  a  cushion  for  all  trade-in 
allowances  on  all  sets." 

A  New  Jersey  dealer  feels  that 
manufacturers   should   "Consign   sets." 

Neec/ec/  merchandise 

California  questions  multi-tube 
claims:  "Stop  trying  to  sell  the  public 
a  stock  of  tubes  instead  of  a  radio." 

Also  from  California:  "Change  the 
style.  Beautify  the  cabinets.  Cut  out 
the  junk." 

Mississippi  sends  a  demand:  "In- 
vent something  to  obsolete  present 
sets.     Reduce  list  and  net." 

Nebraska  reports:  "We  need  lay- 
down  table  models  with  a  place  for 
batteries  in  the  cabinets — something  to 
compete   with   mail-order  houses." 

New  York  decides:  "We  need  a 
combination    for    about    $80    or    $90." 

While   a    Georgia    dealer   writes:    "I 


think  remote  tuning  units  should  be 
made  to  sell  for  about  $20  so  they 
may  be  attached  to  obsolete  models 
by  service  men.  This  would  bring 
an  obsolete  radio  up  to  date." 

Extra  from  Louisiana:  "Arrange 
radios  so  that  they  may  be  easily 
adapted  to  the  use  of  extra  speakers, 
phonographs  and  intercommunicators." 

A  point  from  Pennsylvania:  "Sets 
of  $100  or  more  should  have  old-time 
paper  filter  condensers  as  sales  point." 

Illinois  contributes:  "Offer  some 
different  form  of  home  entertainment 
such  as  a  connection  for  a  home 
broadcast  mike  that  is  fool  proof  and 
that  anybody  can  connect  up." 

From  Ohio:  "Squelch  all  references 
to  television  until  such  time  as  it  is 
read3r  for  the  public  in  general." 

California  just  says:  "Stop  the  silly 
talk  re  television!  " 


Promotion 


On  the  favorite  subject  of  manufac- 
turer's helps,  national  advertising,  and 
general  promotion,  dealers  from  14 
states  got  wound  up.  From  Michigan: 
"Do  not  make  the  public  feel  that  the 
radio  has  everything  but  a  spigot." 

Mississippi:  "Quit  advertising  cheap 
sets.  Show  that  in  modern  times  a 
radio  is  a  real  necessity  for  properly 
enjoying  life  and  keeping  abreast  of 
the    news,    etc." 

Oklahoma:  "Most  radio  salesmen 
don't  know  what  they  are  trying  to 
sell.  We  should  get  prepared  sales 
data  on  each  year's  productions,  like 
they  do  in  the  auto  business." 

Louisiana:  "Make  the  public  radio- 
minded  and  don't  confuse  their  minds 
by  pointing  out  how  much  better  one 
manufacturer's  set  is  than  another. 
Let  the  salesman  do  the  selling.  Let 
the  national  advertising  create  the 
interest." 

Illinois:  "Stop  riding  the  coined 
commercial   phrases   to   death." 

Indiana:  "Less  emphasis  on  tricky 
(Continued  on  page  18.) 


BIGGEST  UNSATURATED  MARKET 

Auto  radios  still  missing   on   three   cars    out   of    four 
Radio  man  has  every  advantage  over  automobile  trade 


Auto-radio   controls  now   become   an   integral  part  of  the   dash   design,   yet  are 
available  for  nearly  all  cars  in  models  sold  by  radio  trade. 


*  Three-quarters  of  the  cars  in 
use  are  not  equipped  with  radios. 
This  means  that  the  market-on-wkeels 
is  by  far  the  largest  unsaturated  mar- 
ket ■with  which  the  average  radio 
dealer  has   any  contact. 

Out  of  every  five  cars  sold  last 
year,  one  was  equipped  with  radio  by 
the  automobile  trade,  at  the  time  the 
car  was  sold.  Another  of  the  five  was 
later  sold  a  car-radio  by  the  independ- 
ent radio  dealer — an  "after  sale."  But 
the  remaining  three  out  of  five  are 
still  in  their  drivers'  hands  without 
any  radio  whatever  being  installed. 
Here  is  the  big  immediate  market  for 
radio  sets — sales  at  a  profit,  to  cus- 
tomers who  as  a  class  have  some  sur- 
plus cash. 

Few  "factory"  jobs 

Mythical  "factory  installation"  of 
auto  radios  is  sapping  much  business 
from  the  legitimate  radio  outlets. 
Figures  from  reliable  sources  indicate 
that  the  facts  are  that  only  10  or 
15  per  cent  of  all  the  auto  radios 
sold  by  the  automotive  industry  are 
really  installed  "at  the  factory,"  while 
85  per  cent  to  90  per  cent  are  installed 


by  territorial  or  local  automotive 
dealers  and  distributors,  not  far  from 
the  point  of  sale  of  the  car. 

So,  instead  of  factory-trained  ex- 
perts installing  these  auto  radios,  as 
claimed  by  the  auto  industry,  many  of 
the  installations  are  farmed  out  to 
mechanics  working  on  a  contract 
basis,  installation  often  being  made 
with  the  least  possible  effort,  and 
being  just  good  enough  to  "get  by." 

Service  and  repairs 

Then,  too,  there  is  the  extra  han- 
dling involved  in  the  sale  of  radios 
by  the  car  manufacturers.  In  addi- 
tion to  the  jobber  and  dealer  getting 
his  mark-up,  the  automotive  manufac- 
turer must  also  get  his  cut.  This 
means  that,  dollar  for  dollar,  there  is 
more  value  in  the  sets  sold  by  radio 
outlets. 

In  the  case  of  an  auto-radio  pur- 
chased through  the  car  dealer  and  in- 
stalled by  the  jobber's  mechanic,  serv- 
ice and  repairs  involve  a  rather 
round-about  procedure.  Auto  dealer 
not  having  radio  department  must  re- 
fer   owner    to    jobber,    who    in    turn 


brings  in  his  installation  mechanic. 
On  the  other  hand,  when  the  radio  is 
purchased  from  a  radio  dealer,  there 
is  no  passing  of  the  buck  and  no  extra 
trouble  involved,  for  there  is  usually 
a  service  department  on  the  premises. 
Also,  since  the  radio  dealer  must  him- 
self make  good  on  all  service  dif- 
ficulties, a  better  installation  results. 
Owner  of  auto  radio  sold  through 
the  automotive  trade  is  in  somewhat 
of  a  pickle  when  it  comes  to  repairs, 
for  some  of  the  car  manufacturers  are 
reluctant  to  supply  the  radio  trade 
with  service  data.  Idea,  of  course, 
being  to  force  the  radio  owner  to 
patronize  the  automotive  outlet's 
radio  serviceman.  At  least  locally  in 
New  York  City,  Chevrolet  refuses  to 
give  discounts  on  replacement  parts  to 
legitimate  radio  servicemen.  They  do 
concede,  however,  to  let  the  service- 
man inspect  the  service  data  in  their 
shop,  the  same  as  any  other  customer. 

Radio  man  saves  money 

Radio  dealers  everywhere  can  point 
out  to  their  customers  that  service 
on  sets  bought  from  automotive  out- 
lets will  be  more  expensive.  It  is  also 
reasonable  to  assume  in  many  cases 
that  the  part-time  radiomen  and  me- 
chanics employed  for  installation  and 
repairs  are  not  so  well  trained  and 
experienced  as  those  radio  servicemen 
specializing   in   radio. 

In  addition  to  getting  better  mer- 
chandise for  the  money  from  radio 
dealers,  the  purchaser  of  an  auto 
radio  will  find  many  more  models 
from  which  to  select  in  his  radio  deal- 
er's showroom.  At  present  prices 
range  from  $20  up.  And  only  from 
the  radio  dealer  can  push-button 
radios  be  obtained  for  use  in  any 
make  automobile.  And  many  more 
refinements  are  found  in  the  sets  sold 
in  radio  outlets. 

Interchangeable 

Sets  sold  by  the  radio  dealer  are 
designed  for  100  per  cent  effectiveness 
in  all  makes  of  cars — they  can  easily 
be  changed  from  one  make  car  to  an- 
other. Controls  for  various  cars  are 
stocked  by  the  radio  trade,  so  that  any 
set    is    readily   converted   to   fit   any 


14 


Radio  Today 


auto.  In  contrast,  sets  designed  lor  a 
particular  make  of  auto  may  not  be 
so  easily  changed.  Also,  making  use 
of  the  car  manufacturers'  statements, 
that  the  radios  are  designed  especially 
for  use  in  their  own  models,  it  fol- 
lows that  they  may  not  work  as  satis- 
factorily in  other  makes  of  autos. 
While  there  is  considerable  question 
as  to  the  truthfulness  of  the  manu- 
facturers' claims  for  "custom-built" 
radios,  it  can  be  used  as  an  effective 
argument  in  favor  of  radios  sold  by 
the  radio  trade  and  designed  for  full 
efficiency  in  all  makes  of  automobiles. 
Aggressive  promotion  by  radio  deal- 
ers and  radio  servicemen  will  soon 
dissipate  the  automotive  industry's 
two  myths — factory  installation  and 
custom-built  sets.  This  auto  radio 
business  belongs  to  the  radio  outlet — 
only  experienced  radio  men  can  suc- 
cessfully install  and  service  radio 
sets.  Even  more  important  is  the  fact 
that  the  radio  industry  has  given  the 
radio  dealer  many  exclusive  features 
and  talking  points  to  help  sales.  Let's 
go — more  auto  radios  sold  by  radio 
outlets. 

AUTO  AERIAL  OPERATION 

*  .  In  auto  radio  aerials  many 
special  problems  are  encountered 
which  are  not  found  when  a  less 
restricted  aerial  is  used,  state  the 
Radiart    antenna    engineers. 

Auto  aerials  operate  upon  the  dif- 
ference in  potential  between  the 
aerial  and  that  developed  in  the  car 
body,  by  the  broadcast  signal.  In 
normal  operation,  the  location  of  the 
aerial  with  respect  to  the  earth  has 
no  effect  upon  the  aerial's  pickup 
which  is  unlike  the  ordinary  home 
radio   aerial. 

Also  the  "ground"  provided  by  the 
car  body  is  very  low  resistance  and 
gives  the  aerial  no  "unseen  height" 
advantages  from  high  ground  resist- 
ance. 

The  design  problem  then  is  this; 
"given  either  a  horizontal  aerial  4 
feet  long',  with  an  elevation  above 
'ground'  of  4  to  6  inches,  or  a  ver- 
tical rod  not  exceeding  8  feet  in 
length,  design  an  auto  radio  receiver 
that  will  give  performance  similar  to 
that  of  a  home  receiver  working  with 
a  standard  all  wave  aerial".  And 
the  engineers  have   done   it. 

Auto  radio  engineers  have  one  ad- 
vantage over  home  radio  engineers — 
they  know  the  aerial  characteristics 
they  will  have  to  match.  Since  there 
are  only  a  few  possible  methods  of 
installing  an  auto  aerial,  they  can 
predict  the  characteristics  of  the 
aerial : 


Aerial  Capacity  in  mraf.  Relative  pickup 

Hinge   whip    40-60  55-70 

Hinge    extension     40-60  55-95 

Cowl    extension    50-70  55-110 

4-foot    roof    S5-100  100 

Built-in  roof  150-250  S5-200 

Under  car    200-400  75-110 

Built-in-  roof  plate 800-1500  * 

*  It  was  found  necessary  to  build  a  spe- 
cial receiver  for  this  type  of  aerial.  When 
installing  a  set  not  designed  for  this  aerial, 
do  not  attempt  to  use  it.  install  a  standard 
type  aerial.  This  system  was  used  in  all  1936 
Chrysler   cars  except  Plymouth. 

The  capacity  values  are  the  average 
encountered  in  average  installation 
including  the  lead-in. 

By  various  circuit  devices,  it  is 
possible  to  build  an  aerial  input  cir- 
cuit which  can  be  adjusted  to  res- 
pond equally  well  to  aerials  having 
capacities  of  70  to  200  mmf.  and 
reasonably  well  to  capacities  up  to 
400  mmf.  By  matching  the  aerial 
input  circuit  to  the  aerial  capacity, 
a  minimum  amount  of  energy  is  lost 
in  the  transfer  of  the  signal  from 
the  aerial  to  the  set.  When,  as  often 
happens,  a  set  does  not  have  suffi- 
cient range  to  match  a  given  aerial, 
the  aerial  is  unjustly  blamed  for  the 
set's  poor  performance.  This  diffi- 
culty may  be  overcome  in  either  of 
two  ways : 

When  the  aerial's  capacity  is  too 
low,  a  small  mica  condenser  con- 
nected from  aerial  to  ground  will 
help.  Although  this  method  allows 
the  set  to  absorb  more  of  the  signal 
energy,  it  by-passes  considerable  of 
that  energy  to  ground.  This  loss 
of  signal  strength  may  be  eliminated 
by  the  use  of  a  matching  resonator 
which  efficiently  tunes  the  aerial  to 
the  set  whether  the  aerial  capacity 
be  too  low  or  too  high. 


EXCLUSIVE  LISTING  OF 
AUTO  RADIO  ANTENNAS 


Model 
No. 


List 
Price      Type    Length  Inches    Finish 


ABC  Radio  Labs.,  3334  N.  New  Jersey  Ave., 

Indianapolis,  Ind. 
A  $3.50     DH        60t  Cr 

B  5.00     RB        48  Cr 

C  3.50      FP         96t  Cr 

Consolidated  Wire  &  Associated  Corps.,  512  S. 

Peoria  St.  Chicago,  111. 
Data  not  available  as  we  go  to  press. 


Galvln 

Mfg.  Corp.,  4545  Augusta  Blvd. 

Chicago, 

111. 

— "Motorola" 

M116 

$2.45     Top 

NS 

Cr 

F116 

2.45     Topf 

NS 

Cr 

M192 

2.95*    DH 

22-42t 

1  Cr-Ss 

M191 

3.95*   Cowl 

24-62t 

Cr-Ss 

M193 

3.95     Top 

NS 

Cr 

F193 

3.95     Topt 

NS 

Cr 

M194 

4.95     Top 

Extra  long 

Cr 

F194 

4.95     Topt 

Extra  long 

Cr 

M95 

3.95      RB 

48 

Rub 

M144 

2.45      1937-38  Buick  RB  insulators 

M149 

2.45      1937-38  Oldsmobile  RB  insulators 

Insuline  Corp.  of  America,  23  Park  PI.,  New- 
York,  N.  Y—  "ICA" 
4574           $4.75     Top       26-40t  Cr 

4580             3.95     Topt      19-35t  Cr 

4551  3.50     Cowl      31-60t Cr 

t  For  cars  on  which  windshield  opens. 
*  Including  lead-in. 


Model 

List 

No. 

Price 

Type 

Length  Inches     Finish 

4554 

2.00 

Cowl 

60 

Bl-Cr 

4552 

2.75 

Cowl 

35-68t 

Bl-Cr 

4550 

3.50 

Cowl 

60 

Cr 

4553 

4.00 

Cowl 

30-96t 

Cr 

4250 

.50 

Lead-in  connector 

4507 

4.25 

Topt 

NS 

Cr 

4506 

4.50 

Top 

NS 

Cr 

4526 

2.25 

Top 

62 

Cr 

4525 

2.50* 

DH 

27-54t 

Cr 

4528 

1.85* 

DH 

42 

Cr 

4530 

2.75* 

DH 

50 

Cr 

4531 

2.65* 

DH 

35-68t 

Bl-Cr 

4532 

3.50* 

DH 

33-96 

Cr 

4469 

1.95 

FP 

60 

Bl-Cr 

4770 

2.95 

FP 

30-96t 

Cd 

4501 

2.50* 

RB 

48 

Cd 

J.  F.  D. 

Mfg.  Co.,  4111  Fort  Hamilton  Parkway, 

Brooklyn,  N 

.  Y. 

3B60C 

$5.00 

Cowl 

60t 

Cr 

3B72C 

6.00 

Cowl 

72t 

Cr 

3085 

3.75 

Cowl 

56 

Cr 

3087 

3.00 

Cowl 

54t 

Cr 

3089 

4.50 

Cowl 

96t 

Cr 

3090 

5.00 

Cowl 

72t 

Cr 

3091 

5.50 

Cowl 

96t 

Cr 

2B54H 

2.50 

DH 

54t 

Cr 

3B60H 

4.50 

DH 

60t 

Cr 

3B72H 

5.00 

DH 

72t 

Cr 

3031 

2.50 

DH 

54t 

Cr 

3032 

4.50 

DH 

72t 

Cr 

3033 

5.00 

DH 

96t 

Cr 

3035 

3.50 

DH 

42 

Cr 

930 

2.50 

RB 

42 

Cu 

1125 

2.50 

RB 

48 

Ru 

3050 

4.00 

RB 

48  each 

Ru 

3060 

1.50 

RB 

48 

Cu 

3065 

3.00 

RB 

48  each 

Ru 

(Continued 

on  page  46) 

General-Electric's    model    FA-61    with 
6   tubes    features   4    watts    output. 


Arvin  Sportsman  with  6  tubes  at  top. 
Commander  with  7  tubes  at  bottom. 


Complete  specifications  of  1938  auto  radio  sets  on  page  20 


February,  1938 


15 


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Rackets  that  Are  Ruinins  Radio— VII 

SERVICING   RACKETS 

Gyp  repairs  which  the  set  owner  must  be  warned  against 


•  CONTINUING  its  practice  of 
aiding  the  radio  dealer  and  service- 
man to  combat  rackets,  Radio  Today 
presents  in  the  chart  opposite  an  ex- 
pose of  some  of  the  rackets  in  the  re- 
pairing of  radio  sets.  With  a  knowledge 
of  what  such  rackets  are  and  how  they 
operate,  Radio  Today  believes  that 
legitimate  radiomen  should  inform 
their  customers  and  the  public,  there- 
by protecting  the  interests  of  all 
concerned. 

From  the  public's  standpoint,  radio 
repair  rackets  are  probably  the  most 
vicious  for  they  involve  a  device  far 
beyond  the  knowledge  of  the  layman. 
In  fact,  in  some  communities,  servic- 
ing rackets  are  so  prevalent  that  the 
radio  owners  let  their  sets  remain  de- 
fective or  inoperative,  rather  than 
take  a  chance  of  calling  in  a  "gyp 
artist."  Fortunately  the  number  of 
concerns  so  operating  is  very  small ; 
but  even  so,  how  can  a  person  guard 
against  the  possibility  of  being 
charged  excessive  fees,  unless  he 
knows  what  is  reasonable  and  what 
the  prevalent  rackets  are. 

A  few  of  the  outstanding  rackets 
are  illustrated  on  the  opposite  page. 

Wash  tubes 

The  easiest  and  most  profitable 
racket  of  all  is  the  charging  for  a 
new  set  of  tubes — when  in  reality  the 
new  tubes  are  the  old  ones  which  have 
been  merely  washed  and  labelled  with 
new  stickers.  Honest  servicemen  can 
instill  confidence  by  testing  the  tubes 
and  by  breaking  the  seals  on  the  new 
cartons    in    the    customers'    presence. 


And  as  manufacturers  suggest,  fur- 
ther emphasis  can  be  put  on  the  use- 
lessness  of  the  old  tubes  by  breaking 
the  envelopes  before  throwing  them 
away. 

Broken  antenna  and  ground  wires, 
or  shorted  lightning  arrestors  are 
often  discovered  when  the  gyp  calls, 
but  to  effect  a  larger  bill  the  chassis 
is  yanked  and  brought  to  the  shop  for 
any  combination  of  repairs  that  the 
serviceman  feels  will  pay  him  most. 
And  the  charges  net  a  tremendous 
profit  since  nothing  is  usually  done  to 
the  set — although  there  are  shops  that 
will  change  a  resistor  and  by-pass  con- 
denser so  as  to  have  protection  for 
themselves.  Some  servicemen  are  even 
bold  enough  to  charge  similarly  for 
tuning  or  polarizing  the  plug  in  a  DC 
radio  set. 

Loose  screws 

Loose  set-screws  on  the  dial  mech- 
anism are  the  source  of  another 
racket.  Since  the  set  tunes  in  the  sta- 
tions at  the  wrong  place  and  tuning 
is  difficult,  a  cock-and-bull  story  is 
trumped  up  so  as  to  make  the  set 
owner  feel  that  there  is  serious  trou- 
ble. Usually  the  charge  is  explained 
as  "replacing  the  tuning  condensers, 
and  alignment." 

Adjustment  of  improperly  centered 
speaker  cones  may  be  charged  for  as 
replacing  the  cone — and  with  the 
more  bolder  gyps,  the  bill  is  for  a 
new  speaker  unit. 

A  can  of  black  paint  in  some  shops 
will  make  new  power  transformers  out 
of  the  old  ones  in  but  a  few  minutes. 
Ordinarily      the      transformers      are 


painted    without    removing    the    unit 
from  the  chassis. 

In  some  instances  the  simple  re- 
placement of  a  defective  power  switch 
is  billed  as  the  replacement  of  some 
major  parts   costing  many  dollars. 

Noisy  controls 

And  a  noisy  volume  control  is 
charged  as  noisy  tubes,  burned-out 
loudspeaker,  shorted  filter-condensers. 
Likewise  resoldering  broken  or  open 
connections  is  faked  as  the  repair  of 
more  expensive  items. 

One  of  the  answers  to  the  problem 
is  for  the  serviceman  always  to  re- 
turn to  the  customer  the  parts  that 
were  defective  and  have  been  replaced. 
Sear's  Radio  Clinic  in  Boston  has 
been  making  excellent  progress  with 
such  a  policy.  By  returning  the  old 
parts,  the  customer  is  then  satisfied 
that  they  have  been  replaced  and  are 
of  no  value.  Then  too,  why  shouldn't 
the  serviceman  be  expected  to  return 
the  old  parts?  Certainly  they  belong 
to  the   customer. 

Servicemen  everywhere  can  build 
up  their  prestige  by  acquainting  their 
customers  with  what  are  proper 
charges,  by  explaining  in  what  ways 
customers  may  be  gypped,  and  by 
charging  for  only  actual  work  done 
on  a  radio,  for  there  is  always  the  pos- 
sibility of  another  serviceman  expos- 
ing the  gyp. 

If  the  charge  is  for  labor,  bill  it 
as  such,  rather  than  for  some  phony 
part  or  repair.  After  all,  in  almost 
every  line  of  business,  the  labor 
charges  are  much  greater  than  the 
material,  and  this  statement  is  par- 
ticularly true  in  radio. 


RAI 

1922 

DIC 

7S  GROWTH, 

Total  Sets 

Number                           Value 

100,000                  $5,000,000 
550,000                   15,000,000 
1.500,000                100,000,000 
2,  f  0  ), 000                165 . 000. 000 
1.7o0,000                200,000.000 
1,350,000                168.000,000 
3.281,000                400,000,000 
4,428,000                GOO. 000, 000 
3,827,800                300.000.000 
3.420,000                225,000.000 
3,000,000                140.000.000 
3,806.000                230.099.000 
4 . 084 , 000                270 , 000. 000 
6,026,800                330.192.480 
8.248.000                450.000.000 
7, 700, 000                450, 000, 000 

et3  include  value  of  tubes  in  receivers. 

1922  TO  1937 

Total  Tubes  Sold 

Number                         Value 

1,000,000                $6,000,000 
4,500,000                12,000,000 
12,000,000                36.000.000 
20 . 000 , 000                48 . 000 , 000 
30 . 000 , 000                58 . 000 . 000 
41,200,000                67,300.000 
50,200,000              110.250,000 
69, 000, 000              172, 500, 000 
52.000.000              119.600,000 
53.000,000                69.550,000 
44.300,000                48.730,000 
59.000.000                49.000.000 
58.000,000                36.600.000 
71.000.000                50,000.000 
98.000.000                69.000,000 
101.000,000                85,000.000 

In  recent  years,  replacement  tubes  ha 

Motor  Car  Sets 
Number                  Value 

34.000            $3,000,000 

108,000              5,940,000 

143.000              7.150,000 

724,000            28.598.000 

780.000            28,000.000 

1.125.000            54.562, 500 

1.412,000           69,188.000 

1,750.000            87,500,000 

ve  run  at  about  409i  of  tota 

(Compiled    for    Broadcasting 
O.   H.   Caldwell,  Editor  of  R 

Grand  Total:  Sales  of 

Radio  Apparatus  Tor            Homes  with             Auto  Sets 
Broadcast  Reception            Radio  Sets                 in  Use 

Value                              Number                    Number 

$60,000,000                           60,000                   

136.000.000                     1.50O. 000 

358.000.000                    3,000,000                   

690.550.000                    7,500.000                   

496.432,000                  12.048,762                   

300, 000, 000                  14, 000, 000                     100, 000 
200.000.000                  16,809,562                    250,000 
300.000,000                  20,402,369                     500,000 
350.000.000                  21.456.000                1,250,000 
370.000.000                  22.869.000                2.000,000 
500,000.000                  24,600.000                3,500,000 
537.000.000                  26.000,000                5,000,000 

tube  sales.     All  figures  are  at  retail  values,     t  Includes  h 

Yearbook   by 
adio   Today.) 

Total  Radio 

Sets  in  Use 

in  U.  S. 

T400.000 
tl, 000, 000 
2,500,000 
3.500,000 
5,000,000 
6,500.000 
8,500,000 

1924 

1926 

1928 
1929 

13,000,000 

1931 

1933 

1934 

1935-.. . 

1936"... 
1937-.. . 

33,000.000 

-  Fifur 

esfor 

jme-built  sets. 

February,  1938 


17 


DEALER  VOLCANO  ERUPTS 

{Continued  from  page  13) 

features,  more  on  tone  selectivity  and 
quality,  both  in  advertising  and  manu- 
facturing." 

Ohio:  "Push  new  set  sales  on  merit 
of  tone  and  performance  directly  to 
consumer  by  recommending  reliable 
service  men  who  are  coming  in  daily 
contact  with  the  buying  public  and 
whose  advice  is  usually  asked  for  by 
the    customer." 

New  York:  "Most  window  displays 
are  very  large  and  bulky.  We  are 
always  wishing  for  small  cards,  etc., 
to  display  on  window  sets." 

Also  from  New  York,  the  sugges- 
tion: "Cooperative  'Two  Sets  in  the 
Home'  campaigns  or  'Individual 
Radio.'  " 

Maine:  "Have  RMA  cooperate  with 
electrical  manufacturers  to  install  fil- 
ters on  appliances — especially  oil  burn- 
ers and  razors.  In  this  locality  field 
strength  is  so  low,  that  noise  is  our 
greatest  drawback." 

Another  from  Maine:  "Dealers 
should  be  assisted  with  a  Spring  sell- 
ing campaign  which  will  go  directly 
into   consumer's   homes." 

South  Dakota:  "Advertisement  along 
lines  that  car  manufacturers  have 
adopted.  Training  dealers  to  service 
machines  before  placing  on  demonstra- 
tion. This  is  becoming  increasmgn 
important." 

Iowa:  "On  the  whole  I  think  the 
manufacturers  are  already  doing  all 
they  can.  Fault  lies  in  other  direc- 
tions." 

North  Dakota:  "Small  dealers  should 
get  more  free  advertising  material  and 
display  material  with  smaller  initial 
orders." 

California  sends  three  suggestions: 
"Stop  promising  the  world  on  a  radio. 
Sell  radio  as  a  marvelous  instrument 
without  cheap  ballyhoo,"  and  "Radio 
should  be  continuously  advertised  from 
one  month  tcPanother — no  dull  seasons," 
along  with  the  idea  that  manufacturers 
should  "Sponsor  public  radio  shows 
in  key  cities.  Cut  out  wild  claims 
for  sets." 

Cabinets 

"Gadgets  inside  do  not  create  jeal- 
ousy; appearance  does.  As  things  stand, 
when  Mrs.  Jones  sees  Mrs.  Smith's 
new  radio  there  is  no  jealousy  cre- 
ated," says  a  New  Jersey  dealer,  while 
from  California:  "Put  more  in  the  set 
and  less  'gingerbread'  in  the  cabinet." 

Minnesota  view:  "Make  it  possible 
to  select  a  cabinet  for  appearance,  ana 
then  install  one  of  say  three  cnassis 
in  this  cabinet — easily." 

From  Connecticut:  "Manufacturers 
should  put  in  three  period-styled 
cabinets  to  replace  modern  Duncan 
Phyfe,  Sheraton  and  Queen  Anne. 
Try  to  imagine  a  modernistic  radio 
in  a  Georgian,  or  any  other  period 
grouping.  It  just  doesn't  fit  into  the 
scheme  of  interior  decoration  at  all." 


Dumping 


A  New  York  notion:  "Stop  bring- 
ing out  models  ten  times  a  year  and 
concentrate  advertising  on  a  few 
models  so  the  public  will  stop  waiting 
for  the  next  model  and  buy  with  con- 
fidence." 

Illinois  complaint:  "The  public  is 
educated  to  wait  for  the  yearly  dump- 
ing, caused  by  continuous  overproduc- 
tion.    Guarantee  no  dumping.." 

Colorado  telegram:  "Go  back  to 
fewer  models.  Stress  tone.  No  gad- 
gets." 

California  adds  this:  "Manufactur- 
ers should  allow  the  demand  to  set  the 
manufacturing  pace,  instead  of  vice 
versa.  This  may  not  speed  up  sales 
but  it  will  speed  up   profits." 

Help  Connecticut  store:  "Dealers 
should  be  assisted  in  moving  current 
models  before  new  ones  are  an- 
nounced." 


WHAT  IS  THE  ANSWER? 

Next  month  RADIO  TODAY  is 
inviting  industry  leaders  to  present 
their  solutions  to  remedy  the  evils 
about  which  dealers  complain  so 
bitterly. 

The  problems  here  touched  upon 
deserve  the  most  searching  study. 
RADIO  TODAY  will  enlist  the  help 
of  some  of  the  best  merchandising 
minds  in  radio — in  addition  to  offer- 
ing editorial  proposals  of  its  own — to 
clear  up  the  present  sore  spots  in  radio 
distribution. 

WATCH  FOR  THE  MARCH  ISSUE! 


Note  from  Michigan:  "Cut  out  about 
half  of  the  models — down  to  just  a 
few  in   each  price  bracket." 

Letter  from  Maine:  "Manufacturers 
might  add  a  few  models  to  their  regu- 
lar line  to  be  sold  to  dealers  at  longer 
discounts  and  carrying  an  increased 
retail  list  price.  Such  'promotional 
models'  must  necessarily  have  many 
sales  features  not  used  in  regular  line. 
This  would  enable  the  dealers  with  a 
large  overhead  to  concentrate  their 
advertising  and  sales  force  on  one  or 
more  nationally  advertised  makes,  in- 
stead of  (through  necessity)  handling 
radios   with   no  public   acceptance." 

Questions  of  outlets 

Iowa  reports:  "At  present,  at  least 
in  this  part  of  the  country,  radios  are 
sold  by  garagemen,  druggists,  hard- 
ware stores — well  almost  anywhere 
except  the  grocery  stores  and  we  ex- 
pect most  of  them  to  take  on  a  radio 
contract  any  day.  As  if  such  a  combina- 
tion plus  radios  bought  through  mail 
order  houses  were  not  enough  to  make 
a  difficult  sales  job  harder,  we  have 
the  wholesalers  .  .  .  leaving  the  land 
shorn  of  radio  prospects." 


A  Massachusetts  dealer's  slap  for 
manufacturers:  "Stop  being  wrangling 
children  and  operate  as  sensible  busi- 
ness. No  need  of  the  radio  business 
being  a  racket.  Pick  clean  retailers, 
cut  out  the  gyps.  Give  retailers  a 
chance  to  make  a  profitable  margin." 

California:  "Develop  a  sound  mer- 
chandising and  distribution  policy — 
with  secure  and  protected  franchises 
to  established  and  proven  dealers." 

Also  from  the  Coast:  "Stop  distribu- 
tors from  selling  to  all  drug  and  gro- 
cery stores.  Radios  should  be  sold  by 
radio    stores    only." 

A  not-too-serious-we-hope  sugges- 
tion from  New  York:  "Hold  a  cruise 
to  Spain  for  chain-store  executives, 
and  leave  them  there." 

Ohio  remark:  "Cut  out  drug  stores 
and  hardware  type  dealers.  You  don't 
buy  your  new  automobile  from  your  ice 
dealer.  Radio  is  too  big  a  thing  to 
be  a   sideline  any   more." 

Quality  questioned 

Texas  wants:  "A  more  conservative 
radio,  with  fewer  gadgets — a  simple 
one  that  would  cost  less  to  service, 
would  be  more  profitable  to  all  con- 
cerned." 

New  York  insists  that:  "Radio 
prices  are  out  of  line  entirely.  Manu- 
facturers should  increase  consumer 
value  of  merchandise  by  putting  into 
it  the  money  now  used  for  cruises,  etc." 

A  policy  from  Iowa:  "Engineer 
trouble-free  sets,  with  fewer  gadgets 
that  cause  mechanical   failure." 

The  Missouri  idea:  "Expose  fake 
sets  such  as  RADIO  TODAY  maga- 
ine   is   doing." 

Briefly,  from  Wyoming:  "Less 
ballyhoo  and  more  radio." 

Wisconsin  dealer  suggests:  "Get  a 
real  distance  performer.  There  are 
still  plenty  of  people  who  will  buy 
on  a  basis  of  honest  distance,  not 
advertised  distance.  We  have  sold 
several  communication  sets  to  people 
not   hams." 

Illinois  report:  "People  in  this  lo- 
cality are  dissatisfied  with  reception 
even  through  large  new  consoles.  Re- 
ception is  disgusting,  due  to  Mexican 
stations  and  too  many  stations  on 
two-thirds  of  dial." 

Finding  the   answer 

What  is  the  answer  to  these  em- 
phatic demands?  What  is  the  solu- 
tion to  the  problems  that  beset  radio 
distribution  ? 

Next  month  Eadio  Today  will  pre- 
sent from  radio-industry  leaders  some 
practical  suggestions  to  help  solve  the 
difficulties  that  now  face  radio  sell- 
ing. Outstanding  figures  in  the  mer- 
chandising of  radio  will  be  invited  to 
offer  their  comments  and  solutions. 
These  industry  opinions  will  be  pre- 
sented, together  with  an  editorial 
summary  of  radio's  problems  and 
their  remedies. 


18 


Radio  Today 


FORWARD  WITH  SALES 

Dealers     register     constructive     merchandising    ideas 


STREAMLINED  SELLING 

*  Streamlining  a  radio  store  def- 
initely increases  business,  due  to  the 
fact  that  it  enables  prospective  cus- 
tomers to  see  more  clearly  and  quickly 
the  merchandise  on  display,  according 
to  Sam  Shapiro,  Atlas  Radio  Stores, 
Milwaukee. 

Firm  lately  remodeled  its  store  at 
725  N.  Plankinton  Ave.  and  imme- 
diately an  increase  in  business  was 
noted,  according  to  Mr.  Shapiro.  One 
of  the  features  in  the  remodeling 
program  was  the  rebuilding  of  a  dis- 
play balcony;  floors  of  this  balcony 
are  laid  with  tan  figured  linoleum.  A 
neat  railing,  which  is  made  of  thin 
wooden  strips,  is  painted  in  silver. 
The  walls  of  the  entire  store  are 
painted  in  light  cream,  with  blue 
trimming. 

Another  feature  of  the  remodeling 
program  is  the  installation  of  five 
large  sound-proof  booths.  According 
to  Mr.  Shapiro,  this  factor  alone  has 
resulted  in  additional  sales.  Quiet 
and  privacy  in  a  store  this  size  is 
absolutely  necessary  to  increased 
sales.  Noise  and  confusion  hinders 
a  prospective  customer  from  making 
a  decision  to  buy,  he  declares. 

"Many  an  unavoidable  interruption 
under  the  open-store  system  has  lost 
a  sale,"  states  Mr.  Shapiro,  "because 
attention  was  diverted  from  the  set 
being  inspected.  With  the  booth 
system  we  are  able  to  demonstrate 
more  clearly  to  prospective  customers 
the  excellence,  tone  quality  and 
range  of  radio  sets  we  handle." 


DEMONSTRATING  HIGH  FIDELITY 
AT  COLLEGE 

*  Frigid  Electric  Co.,  Springfield, 
Mo.,  staged  two  high  fidelity  demon- 
strations at  the  local  D'rury  College's 
Hall  of  Music,  netted  a  new  list  of 
250  good  prospects,  and  placed  a  con- 
siderable number  of  sets  out  on  home 
demonstration. 

George  F.  Baldwin,  head  of  the 
Springfield  store,  reports  that  more 
than  1,000  persons  went  to  the  two 
shows  and  were  delighted  with  the 
educational  aspects  as  well  as  the  en- 
tertainment.        Arrangements      were 


made  with  local  school  and  college  of- 
ficials to  hold  a  matinee  which  stu- 
dents could  attend;  classes  in  music, 
physics  and  science  came  en  masse. 
Music  lovers  and  radio  fans  crowded 
the  evening  event. 

Equipment  from  Stromberg-Carl- 
son's  acoustical  laboratory  was  used 
during  the  shows.  Various  frequencies 
were  filtered  out  to  demonstrate  audio 
qualities. 


KNOW  WHAT  TO  SELL,  TO  WHOM, 
AND  WHEN 

*  When  O.  E.  Wurtz,  Jefferson, 
Wis.,  gets  a  radio  prospect  into  his 
store  to  look  at  a  radio  set,  he  tries 
to  find  out  at  once  just  what  the 
prospect  likes  about  radio,  and  then 
he  concentrates  his  sales  attention  on 
that  feature. 

For  example,  some  people,  says  he, 
are  interested  in  tone,  some  in  recep- 
tion, some  in  foreign  stations,  some 
in  farm  programs,  some  in  cabinet 
design,  etc.  Mr.  Wurtz  believes  it  is 
not  wise  to  try  to  sell  a  prospefct  on 
every  feature  of  a  radio,  but  instead 
to  stress  those  things  in  which  the 
prospect  is  interested.  This  idea  has 
helped  him  to  make  many  sales. 


Mr.  Wurtz  knows  which  people  in 
his  section  are  farmers  or  who  have 
rural  interests.  To  these  he  lays 
great  emphasis  on  the  various  farm 
programs  and  how  the  new  sets  will 
bring  them  in.  To  a  city  or  town 
worker,  he  stresses  the  entertainment 
features  it  is  possible  to  enjoy  to 
greater  extent  by  owning  one  of  the 
new  radios,  with  fine  tone  and  recep- 
tion qualities.  When  the  prospect  is 
a  woman,  Mr.  Wurtz  always  points 
out  the  beauty  of  the  cabinet,  the  nice 
design  and  how  the  radio  will  be  an 
asset  in  the  home  furnishing  scheme. 
Educational  qualities,  too,  are  stressed 
to  young  folks  who  are  going  to 
school  and  who  often  have  a  voice 
in  whether  a  radio  shall  be  purchased 
for  the  home. 

GOLD-FINISHED  INITIALS 
FOR  SETS 

*  Into  radio's  sales  promotion 
program  has  come  a  new  device — the 
use  of  personal  initials.  Dealers  now 
have  a  chance  to  "personalize"  radio 
receivers  and  give  them  extra  appeal. 
The  gold-finished  insignia  have  been 
introduced  by  Crosley  Corp.  as  spe- 
cially suitable  for  use  on  table  models. 

The  form  of  the  letters  is  quiet 
and  distinctive  and  they  make  their 
appearance  in  the  radio  field  at  a  time 
when  the  device  is  already  well  estab- 
lished in  other  lines  of  merchandise. 

This  idea  will  deserve  an  extra  play 
during  the  Easter  period,  and  promo- 
tion plans  will  be  made  for  Mother's 
Day  and  Father's  Day  application. 


'RADIO  NEWSPAPER"— NEXT  PRODUCT  FOR  DEALERS  TO  SELL  AND  SERVICE 


"Radio  newspapers"  are  practically  ready  for  the  American  home.    Facsimile  is 

being  transmitted  by  13  stations  today;  there  are  five  manufacturers  making  the 

attachments  for  radio  sets.     Above  is  one  of  the  two  RCA  facsimile  models. 


February,  1938 


19 


AUTO  RADIO  SPECIFICATIONS 


Type  & 

Watts     Amps. 

Speaker 

Recep 

-    location 

Model                    List     No.  of     audio       batt.      R.F 

Tone 

tion 

tuning 

Type  Type 

}f      Dimensions 

I.F. 

No.                     price      tubes      power      drain     amp 

.  Size  Type 

Location  control 

control    controls 

ant. 

vibrator       of    chassis 

peak      Features 

Automatic  Radio  Mfg.  Co.,  122  Brookline  Ave.,  Boston,  Mass. — "Automatic" 

M10                    NS       5-G              1M          4          No 

5         EE 

Set 

No 

No 

Dir 

Lo 

NonS 

10Mx6J^x4H 

456 

2,9 

M20                    NS       5-G              1M          4          No 

5         EE 

Set 

Yes 

No 

Dir 

Lo 

NonS 

10x6x4 

456 

2,9 

M30                    NS      6-G              1%          4.5       No 

5         EE 

Set 

Yes 

No 

Dir 

Lo 

NonS 

10x6x4 

456 

2,9 

M60                    NS       6-GO           2              4.5       No 

5         EE 

Set 

No 

Yes 

Dir 

Hi-lo 

NonS 

10Mx6Mx4H 

456 

2,9 

M70                    NS       6-GO           3              6          No 

6}4     EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

85^x7x634 

456 

1.  2, 

5 

M80                    NS       8-GO           7              7          No 

6K     EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

8Mx7x6M 

456 

1,  2. 

5 

Continental  Radio  &  Television  Corp.,  3800  Cortland  St.,  Chicago,  111.— "Admiral 

* 

69                         NS      6-OM           3M           6H      Yes 

6         EE 

Set 

Yes 

No 

Dash 

Hi-lo 

Non  S 

7^x7x8^ 

175 

4 

55                        NS     5-0              2              5           No 

5         EE 

Set 

No 

No 

PB 

Lo 

Non  S 

6Kx5Kxl0J4 

456 

Fada  Radio  &  Electric  Co.,  30-20  Thomson  Ave.,  Long  Island  City 

L.  I. — "Fada  Motoset" 

A50                       NS       E-OM           3               5           No 

5}4     EE 

Set 

No 

No 

Dir 

Hi-lo 

Non  S 

10x6x7 

456 

2,9 

267                        NS       6-G               4               6           Yes 

6         EE 

Set 

Yes 

No 

Rem-IP 

Hi-lo 

NonS 

834x754x734 

175 

2 

Galvin  Mfg.  Corp.,  4545  Augusta  Blvd.,  Chicago,  111.- 

—"Motorola* 

8-30                 $29.95     6-G             Z}4          5.8       Yes 

5>A     EE 

Set 

No 

No 

Rem-IP 

Hi-lo 

NonS 

10>gx6Kx7^ 

262 

8-40                   39.95     6-G              3.6           6          Yes 

63-S     EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

10;sx6Hx7H 

262 

2,4, 

7 

8-50                   49.95     6-G              4.5           5.8       Yes 

8    "      EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

11x854x6 

262 

2,3, 

4,  5,  7,  8 

8-60                   59.95     6-G              4.5           5.8       Yes 

6        EE 

Set 

Yes 

Yes 

PB 

Hi-lo 

NonS 

12.i,x8Hx7K 

262 

2,3, 

4,5,  8 

8-70                   69.95     8-0            15              &X      Yes 

8         PM 

Cowl 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

11x854x6 

262 

2,3, 

5,  7,  8 

Golden  Voice    79.95     8-0            15              8M      Yes 

8         PM 

Cowl 

Yes 

Yes 

PB 

Hi-lo 

NonS 

12Hx8Hx7K 

262 

2,3, 

5.7,  8 

General  Electric  Co.,  1285  Boston  Ave.,  Bridgeport,  Conn. — "G-E' 

FA60                $29.95      6-M              4               7%       Yes 

6H     EE 

Set 

No 

No 

Rem-IP 

Hi-lo 

Syn 

9x8x7 A 

175 

4 

FA61                   39.95     6-M              4               7%       Yes 

6V2     EE 

Set 

Yes 

No 

Rem-IP 

Hi-lo 

Syn 

9x8x7  A 

175 

4 

Herbert  H.  Horn  Co.,  1201  S.  Olive  St.,  Los  Angeles, 

Calir— "Tiffany-Tone' 

557                    $29.95      5-OG            3               6           No 

5        EE 

Set 

Yes 

No 

Rem-IP 

Lo 

NonS 

6J4x7xll 

465 

1 

Howard  Radio  Co.,  1731  Belmont  Ave.,  Chicago,  111.— 

-"Howard" 

HA7                  $42.95      6-OM           4.5            7.6        Yes 

6        EE 

Set 

Yes 

No 

Rem-IP 

Lo 

NonS 

734x6x9% 

465 

1.2, 

4,  5 

HA8                  64.50     8-0              9              5.5       Yes 

8        PM 

Cowl 

Yes 

No 

Rem-IP 

Lo 

NonS 

714x6x934 

465 

1,2, 

4,5 

HA9                    49.95      6-OM           4.5            5.5        Yes 

8        PM 

Cow] 

Yes 

No 

Rem-IP 

Lo 

NonS 

7Mx6x9?i 

465 

1.2, 

4,5 

Montgomery,  Ward  &  Co.,  Chicago,  111. — "Airline" 

263                  $23.35t     6-G               2.4            7.3        Yes 

SX     EE 

Set 

Yes 

No 

Rem 

Hi-lo 

NonS 

8Mx7tjx6& 

175 

4 

258                    31.95t      6-GM           6.0            8.3        Yes 

6         EE 

Set 

Yes 

Yes 

Rem 

Hi-lo 

Syn 

105^x73^x654 

175 

4 

tLess  Panel  Kits. 

Noblitt-Sparks  Industries,  Columbus,  Ind. — "Arvin 

* 

5                      $24.95     5-0              3              5.5       No 

5        EE 

Set 

No 

No 

Rem-U 

Lo 

NonS 

854x854x654 

455 

1,2, 

4 

22A                    37.95     6-MO          3              6.2       Yes 

5'A     EE 

Set 

No 

No 

Rem-IP 

Lo 

NonS 

8' 4x8 '4x654 

170 

1.2, 

4 

32                      49.95     6-MO          5              6.6       Yes 

8         EE 

Opt. 

Yes 

Yes 

Rem-IP 

Lo 

NonS 

834x834x654 

170 

1,2, 

4 

42                      59.95     7-OM          9              7.2       Yes 

8        EE* 

Opt. 

Yes 

Yes 

Rem-IP 

Lo 

NonS 

854x854x654 

170 

1,2, 

4 

*PM  in  separate  case  only. 

Pacific  Radio  Corp.,  844  W.  Adams  St.,  Chicago,  III- 

-"Pacific" 

38H5                $19.95      5-GM          33^           5           No 

5        EE 

Set 

Yes 

Yes 

Dir 

Hi-lo 

NonS 

534x6x1054 

456 

9 

38H6                  39.95      6-GM          Z)/2           5           Yes 

6        EE 

Set 

Yes 

Yes 

Rem-IP 

Hi 

NonS 

63€x85-s'x954 

262 

2,4, 

5 

Philco— See  Transitone 

Pierce-Airo,  Inc.,  440  Lafayette  St.,  New  York,  N.  Y. 

— "DeWald  Mototone' 

527                    $24.95     5-G               3               6           No 

5         EE 

Set 

Yes 

No 

Dir 

Hi-lo 

NonS 

10x6x654 

456 

9 

702                      44.95      7-GM          3.5            634       Yes 

6         EE 

Cowl 

Yes 

No 

Rem-IP 

Hi-lo 

NonS 

9x754x734 

175 

4 

Radolek  Co.,  601  W.  Randolph  St.,  Chicago,  111. 

N16815-660     $39.95     6-G              334           6           Yes 

6         EE 

Set 

Yes 

No 

Rem-IP 

Hi-lo 

NonS 

854x754x6 

262.5 

1,  2 

N16840-R6440  74.95      7-0               9.5            734       Yes 

8&6    EE 

Cowl-hdr  Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

954x1134x834 

262 

N16826-B661    48.90      6-G               3               5.8        Yes 

6         EE 

Set 

Yes 

No 

PB 

Hi-lo 

NonS 

8Mx7^x7 

175 

1 

RCA  Mfg.  Co.,  Front  &  Cooper  St..  Camden,  N.  J.—' 

RCA-Victor' 

8M                        NS       5-0               3.5            6           No 

5         EE 

Set 

No 

No 

Dir 

Lo 

NonS 

5Tsx6xl0J4 

460 

4,9 

8M1                     NS       6-OM          3.5           6.6       Yes 

5         EE 

Set 

No 

No 

Rem-IP 

Lo 

NonS 

7x10x734 

260 

1,2, 

4 

8M2                    NS       6-OM          3.5           6.6       Yes 

8         EE 

Cowl 

Yes 

No 

Rem-IP 

Lo 

NonS 

7x10x734 

260 

1,2, 

4 

8M3                      NS        6-OM           9.0            7.5        Yes 

6         EE 

Set 

Yes 

No 

Rem-IP 

Lo 

Syn 

7x10x754 

260 

1,2, 

4 

8M4                      NS       6-OM           9.0            7.5        Yes 

8        EE 

Cowl 

Yes 

Yes 

Rem-IP 

Lo 

Syn 

7x10x754 

260 

1.2, 

3,4 

Transitone  Automobile  Radio  Corp.,  Tioga  &  C  Sts 

,  Philadelphia 

,  Pa. — "Philco  Transitone" 

920                   $24.95     5-G              NS           NS       No 

5}.5     EE 

Set 

No 

No 

Dir 

Lo 

NonS 

7Mx5Kx9H 

260 

9,  10 

926                    39.95     6-G              NS           NS       Yes 

6JS     EE 

Set 

Yes 

Yes 

Rem-IP 

Lo 

NonS 

9x834x654 

260 

927                    49.95     7-G              NS           NS      Yes 

7K     EE 

Set 

Yes 

Yes 

Rem-IP 

Lo 

NonS 

9x&%x7ys 

260 

6 

928K                 59.95     7-G              NS           NS       Yes 

iy2    EE 

Cowl 

Yes 

Yes 

Rem-IP 

Lo 

NonS 

9x&Hx6H 

260 

6 

Trav-ler  Radio  &  Television  Corp.,  1026  W.  Van  Buren  St.,  Chicago,  111. — "Trav-ler 

610                  $39.95     6-M             4              6          No 

&y2    EE 

Set 

Yes 

No 

Rem-U 

Hi 

NonS 

854x734x6 

456 

1,  4 

710                      49.95      7-M              8               7           Yes 

6H     EE 

Set 

Yes 

Yes 

Rem-U 

Hi 

Non  S 

8Jix7Hx6 

456 

1,3, 

4 

711                     59.95     7-M             8.             7          Yes 

8        EE 

Cowl 

Yes 

Yes 

Rem-U 

Hi 

Non  S 

854x754x6 

456 

1,  3, 

4 

Troy  Radio  Mfg.  Co.,  1144  So.  Olive  St.,  Los  Angeles 

Calif.— "Troy" 

86                    $29.95     6-GM          2K          6          No 

5         EE 

Set 

No 

No 

Rem 

Hi-lo 

NonS 

&Hx7}4x63A 

465 

1 

87                        35.95      7-GM          iy2           6}4       Yes 

6        EE 

Set 

Yes 

Yes 

Rem 

Hi-lo 

NonS 

934x8x7 

465 

1 

Universal  Battery  Co.,  3410  S.  LaSalle  St.,  Chicago,— 

-"Universal" 

60                      $39.95      6-GM          ZY2           6.1        Yes 

6         EE 

Set-Hdr 

Yes 

No 

Rem-IP 

Hi-lo 

NonS 

1154x654x734 

262 

1.  4, 

5 

70                      54.95     7-OM          7y2          6.5       Yes 

6         EE 

Set-Hdr 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

H5Sx63«x734 

262 

1,  4, 

5 

80                      65.95     8-OM          8M          7.3       Yes 

6         PM 

Set-Hdr 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

1154*634x734 

262 

1,4, 

5 

United  Motors  Service,  Inc.,  3044  W.  Grand  Blvd.,  Detroit,  Mich.- 

— "Delco' 

R663                $27.95     6-0              2H          5          Yes 

5         EE 

Set 

No 

No 

Dir 

Non  S 

654x1054x634 

262 

9 

R664                 39.95     6-0              4^          6          Yes 

6         EE 

Set 

Yes 

No 

Rem-IP 

50 
to 
325 

mmfd 

NonS 

734x654x10'  i 

262 

R665                 51.95     6-0              5              6          Yes 

8         EE 

Set 

Yes 

No 

Rem-IP 

NonS 

8-<:,"x6'^xl053 

262 

5 

R666                   57.95      6-0               6               6           Yes 

8         EE 

[  Cowl    1 
(Hdr-IP  / 

Yes 

No 

Rem-IP  \ 

NonS 

S^xeUxlO5, 

262 

3,5 

R667                   68.95      6-0               6               6           Yes 

8         EE 

Yes 

No 

RB-Rem 

NonS 

8:14x6'2xl03s 

262 

3,5 

R668                 67.95     7-0            12              6*4      Yes 

8         EE 

Cowl 

Yes 

No 

Rem-IP 

NonS 

8;'4x6'2xl0>s 

262 

3.5 

R669                 78.95     7-0            12              6y2      Yes 

8         EE 

Cowl 

Yes 

No 

PB-Rem 

. 

NonS 

834x634x103  J 

262 

3,5 

Wholesale  Radio  Service  Co.,  Inc.,  100  Sixth  Ave.,  New  York,  N. 

Y. — "Lafayette" 

S-9                    $31.90     5-G               2               5           No 

5         EE 

Set 

Yes 

No 

Dir 

Hi 

NonS 

634x1254x6  34 

456 

2 

D-37                   59.90      7-MO           7               8           1 

6         EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

UXx5Hx7% 

262 

1,  2, 

5 

EB-17A             39.70     6-GO           3              6          No 

5         EE 

Set 

Yes 

Yes 

Rem-IP 

Hi-lo 

NonS 

9x6x8 

456 

1 

Zephyr  Radio  Co.,  13139  Hamilton  Ave.,  Detroit,  Mich. — "Zephyr 

3M7                  $47.50     7-GM          3               5           Yes 

§y2    EE 

Set 

Yes 

Yes 

Rem 

Hi 

Non  S 

7x9x8 

262  y2 

3M5                    34.95      5-G               2               4           No 

5         EE 

Set 

No 

No 

Dir 

Hi 

Non  S 

6x5x10 

456 

5 

Legend                                               TUNING  CONTROLS 

VIBRATOR 

4.  Iron-core    coils. 

TUBES                                                      Rem— Remote. 

NonS — Non   synchronous. 

5.  Cold  cathode  rectifie 

r. 

G — Glass.                                                  Dir — Direct. 

Syn — Svnchrnnnus-reetifler. 

6.  Inverse  feed-back. 

0 — Octal    glass.                                    PB — Push  button. 
M — Metal,                                                 IP — Instrument   panel. 

7.  Automatic  tuning  other  than  PB. 

GM — Glass    mainly,    some    metal.          U — Under   instrument    panel. 

FEATURF^ 

8.  Temperature  compensation. 

MG — Metal   mainly,   some   glass. 

9.  Chassis    mounts   behind   instrumi 

panel. 

SPEAKER    FIELD                                      ANTENNA 

1.  Single    hole 

nounting. 

10.  Preselector   antenna 

tuning. 

EE — Electrically    excited.                      Hi — High   capacity 

2.  Antenna    filte 

. 

PM — Permanent    magnet    dynamic.        Lo — Low   capacity. 

3.  Acoustical    compensation    or    treatment. 

NS — Not  stated  by  manufacturer. 

20 


Radio  Today 


More   safety  with  sound — the  Electrical  Equipment  Co.,  Miami,   Fla.,   sold  this 
mobile  system  to  the  Police  Dept.'s  Accident  Prevention  Bureau  (Webster-Chicago) 


POINTS  ON  POBLIC  ADDRESS 


CHURCH  CHIMES  POPULAR 

*  New  and  lively  interest  in 
sound-amplified  church  chimes,  is  re- 
ported from  different  parts  of  the 
country.  A  number  of  new  church- 
steeple  installations  have  gone  in,  and 
these  have  been  effective  in  increas- 
ing church  attendance.  Churches  to- 
day feel  the  need  of  calling  them- 
selves to  the  attention  of  the  public, 
and  amplifier  chimes  provide  a  most 
effective  and  dignified  means  of  ad- 
vertising religious  services  to  the 
community,  particularly  when  organ 
music  is  fed  through  the  tower 
speakers. 

Many  such  church  installations 
have  been  paid  for  by  endowments  or 
gifts  from  elderly  and  wealthy  par- 
ishioners. For  $1,200  to  $1,500,  a 
very  satisfactory  church-steeple  job 
can  be  installed.  With  speaker-chimes, 
the  tower  does  not  have  to  be  re-in- 
forced  as  is  necessary  with  heavy 
bells.  Installations  can  be  made 
quickly.  One  order  (from  Lowville, 
N.  Y.)  reached  the  Camden,  N.  J., 
factory  by  phone  on  Wednesday,  and 
the  material  was  shipped  and  work- 
ing the  following  Sunday,  illustrating 
the  speed  and  simplicity  of  installa- 
tion. 

AMPLIFIED  MUSIC  AIDS 
STREET  DECORATIONS 

*  During  the  Christmas  season, 
the  town  of  Vineland,  N.  J.,  installed 
a    system    of    loudspeakers    along    its 


downtown  streets,  hidden  among  the 
holly  and  colored  electric  lights.  A 
microphone  was  installed  in  the  Meth- 
odist Episcopal  church,  and  from  it 
Protestant,  Catholic  and  Jewish 
choirs  and  congregations  took  turns 
in  providing  choral  and  instrumental 
music  for  the  street  crowds  during 
the  holiday  evenings. 

Creates   good  mood 

Unexpectedly  these  Christmas 
carols  carried  to  the  streets  here  by 
amplification  system,  had  a  reforming 


Promoted  at  Operadio  Mfg.  Co. 

is   Howard  A.   Wilson,   to  post 

of  sales  manager  of  P.A.,  sound 

and  amplifier  division. 


influence  on  Andrew  Jenson,  17,  who 
had  hitch-hiked  from  Hoboken. 

Police  learned  of  the  moral  victory 
when  they  arrested  Jenson  as  a  suspi- 
cious character.  "I  had  planned  to 
rob  a  jewelry  store  but  I  lost  my 
nerve,"  he  confessed.  "The  singing 
made  me  feel  differently." 

SELLING  EQUIPMENT 
FOR  HARD-OF-HEARING 

Possibilities  for  sound  jobs  to  be 
had  among  churches,  auditoriums, 
theaters,  schools,  etc.,  have  increased 
as  new  and  improved  equipment  for 
hard-of-hearing  persons  is  intro- 
duced. 

The  new  headphones,  as  introduced 
by  Webster-Chicago,  are  light  and 
comfortable,  and  are  of  the  one-ear 
type  so  that  the  wearer  may  listen  to 
conversation  as  well  as  to  what  is 
coming  from  the  stage.  Volume  con- 
trol is  provided  "in  a  simple  jack  box." 

It  is  suggested  that  when  the  new 
systems  are  used  in  connection  with 
talking  pictures,  that  "the  input  of 
the  amplifier  should  be  connected  to 
the  loudspeaker  wiring  of  the  sound, 
on  the  film  equipment  installed  in  the 
theater." 

LOUDSPEAKERS  FOR 
CHICAGO  FIREFIGHTERS 

*  Eecently  in  Chicago  when  a 
large  church  building  burst  into 
flames,  the  voice  of  the  fire  chief  came 
booming  through  a  new  100-watt 
loudspeaker  and  could  be  heard  sev- 
eral city  blocks  away.  Firemen  and 
fire-fighting  facilities  were  directed 
and  organized  to  the  best  possible  ad- 
vantage for  saving  lives  and  property. 

The  speaker  is  mounted  on  a  swivel 
atop  the  cab  of  the  light-generating 
truck  which  is  always  present  at 
night  fires.  On  the  swivel,  the  speak- 
er may  be  moved  in  any  direction  to 
aim  the  volume  of  sound  much  like 
the  beam  of  a  searchlight.  The  fire 
marshal  is  given  the  power  to  speak 
to  all  persons  at  the  scene,  to  direct 
them  or  to  warn  them. 

ECA  Victor  has  designed  the  loud- 
speaker with  two  SO-watt  amplifiers, 
and  says  that  "the  use  of  the  world's 
lergest  permanent  radio  magnet  and 
a  new  sound  distribution  design  make 
possible  a  remarkable  efficiency  in  the 
projection  of  sound  with  the  highest 
quality  and  a  minimum  of  power." 

The  system  was  first  used  by  the 
beach  patrol  at  Atlantic  City,  and 
now  after  the  first  trial  in  Chicago,  is 
being  considered  for  all  fire  trucks  in 
the  Windy  City. 


February,  1938 


21 


JPJ 

^>-  \ 

\$M 

^■■i  i  mm 

I}  jij      1 

I  if         1 

fSEf 

^mt£t£*&4 

ES^  ^*^ 

WAX  WORTH  WATCHING 


Action  poses  of  band  leaders,  in  eight  colors,  are  finding  favor  with  record 
dealers  who  want  catchy  displays  for  windows,  counters,  record-players,  etc. 
These   14"   cut-out  figures,   themselves  merchandisers,   come   from   RCA   Victor. 


PROMOTING  THE  PLATTERS 


CUSTOMERS  DELIGHT  IN 
SELECTING  OWN  RECORDS 

*  "You  can't  tell  by  the  cut  of  a 
man's  clothes  or  the  size  of  his  salary 
in  the  income-tax  reports,  how  much 
of  a  buyer  of  records  he  will  be,"  com- 
ments H.  Royer  Smith,  Tenth  and 
Walnut  streets,  Philadelphia,  who  has 
many  of  the  city's  famous  families  on 
his  list  of  regular  customers. 

"In  fact,  one  of  our  best  buyers  of 
phonograph  records  is  a  street-car  con- 
ductor, who  by  this  time  must  have 
over  a  thousand  dollars  invested  in 
his  collection  of  fine  musical  record- 
ings. But  whether  the  purchaser  is 
in  the  lower  income  brackets,  or  is  one 
of  our  limousine  trade,  the  greatest 
enjoyment  he  can  have  is  in  collect- 
ing his  own  record  library — making  a 
selection,  piece  by  piece,  of  the  music 
he  wants  to  hear  and  have  always 
available. 

"To  most  discriminating  record 
buyers,  this  fun  of  collecting  their 
own  records  far  outpaces  any  satis- 
faction in  buying  a  ready-made  lib- 
rary, however  well  selected." 

COUNTING  RECORDS 

*  Once  Radio  Today  went  to  press 
with  the  figures  on  sales  of  records 
for  1937,  there  was  considerable  stir. 
Executives  are  asking  for  breakdowns 
on  this,  one  of  the  liveliest  branches 
of  the  radio  business;  manufacturers 
are  bringing  out  new  record-playing 
instruments. 

Of  the  31,000,000  records  sold  in 
1937,   it   is  estimated   that   about   10 


per  cent  were  in  the  classical  brackets. 
This  means  that  nearly  28,000,000 
popular  discs  were  retailed.  A  good 
section  of  these  no  doubt  went  into 
the  estimated  400,000  coin  machines 
in  the  country. 

Further  checking  of  the  70,000  fig- 
ure as  an  estimate  for  the  number  of 
phonograph-radio  combinations  sold, 
indicates  that  the  count  was  OK,  par- 
ticularly when  small  portables  are  in- 
cluded. Perhaps  5  per  cent  sold  at 
prices  over  $500,  and  another  30  per 
cent  went  out  at  list  prices  over  $250. 

GIVE  'EM  TIME 

*  The  Dunkards  have  checked 
themselves  out  of  considerable  happi- 
ness. They're  a  religious  sect  who 
believe  in  life  without  frills — they 
prefer  beards  (for  the  men),  ultra- 
conservative  clothes,  etc.  And  now 
they've  thumbs-downed  radios  in  their 
homes. 

At  a  recent  national  conference  at 
Delphi,  Ind.,  the  Dunkards  sat  in  a 
dismal  ring  and  made  their  annual 
decision  on  how  much  they  should 
permit  themselves  to  be  streamlined. 
Some  of  the  young  ones  thought  that 
since  the  conference  had  already 
come  over  to  lace  curtains,  autos  and 
telephones,  radio  would  be  next. 

But  the  group  said  no,  radios  are 
wicked.  Think  of  all  the  broadcast 
sermons  and  sacred  music  they're  go- 
ing to  miss ! 

*  The  picture  of  the  singer  ap- 
pearing in  Part  II  of  this  issue  is  an 
NBC    photo    of     Gladys    Swarthout, 


■*•  EVE  SYMINGTON,  LEO  REISMAN,  and 
XAVIER  CUGAT  in  a  feature  album  titled  "A 
Night  at  the  Waldorf."  Titles  Include  Estrellito, 
Blackmail's  Lullaby,  La  Petite  Amie,  St.  Louis  Blues, 
and  four   others — Victor. 

ARTHUR  TRACEY  (The  Street  Singer)  staging 
Bei  Mir  Bist  Du  Schon  and  Shake  Hands  With  A 
Millionaire — Decca   1610. 

RUSS  MORGAN  playing  The  Dipsy  Doodle,  with 
VC  by  Jimmy  Lewis,  and  Tidal  Wave — Brunswick  8052. 

RAYMOND  SCOTT  QUINTETTE  playing  The  Pen- 
guin and  War  Dance  For  Wooden  Indians — Bruns- 
wick 8058. 

ELLA  FITZGERALD  and  her  Savoy  Eight  playing 
Bei  Mir  Bist  Du  Schon  and  It's  My  Turn  Now,  both 
with  VC  by  Ella  Fitzgerald — Decca  1596. 

WINGY  MANN0NE  and  his  orchestra  playing  Loch 
Lomond  and  Annie  Laurie,  both  with  VC  by  Mannone 
—Bluebird  B7389. 

LOUIS  PRIMA  and  his  band  playing  Yes,  There 
Ain't  No  Moonlight,  and  Rosalie  from  the  MGM  pro- 
duction, both  with  VC  by  Louis  Prima — Decca  1618.- 

ELLA  LOGAN  singing  Oh  Dear  What  Can  The 
Matter  Be  and  Jinole  (Binole)  Bells,  both  with  or- 
chestra under  direction  of  Bill  Harty — Brunswick  8057. 

TOMMY  D0RSEY  playing  Stop  Look  And  Listen  and 
Beale  Street  Blues — Victor  25767. 

ABE  LYMAN  playing  How'dja  Like  To  Love  Me, 
with  VC  by  Olga  Sardi,  and  I  Fall  In  Love  With 
You  Every  Day,  with  VC  by  Frank  Parrish  both  from 
the  Paramount  film  "College  Swing" — Bluebird  B7379. 

ETHEL  WATERS  staging  You're  A  Sweetheart  from 
the  Universal  production,  and  I'll  Get  Along  Some- 
how, both  with  Eddie  Mallory  and  his  orchestra — 
Decca    1613. 

MILDRED  BAILEY  and  her  orchestra  playing  I 
See  Your  Face  Before  Me  from  "Between  the  Devil" 
and  Thanks  For  The  Memory  from  "Big  Broadcast  of 
1938",  both  with  VC  by  Mildred  Bailey— Vocation  3931 

radio,  screen  and  opera  star  who  has 
also  made  a  number  of  important 
operatic   recordings. 

*  Photo  of  the  crowd  of  gentle- 
men on  page  13  is  by  Ewing  Galloway. 


RADIO  DISPLAY  GOES  'ROUND 


Mr.  Goodman  and  his  rotary  salesman. 

*  A  new  type  radio  display  for 
use  on  floors  or  in  windows  has  been 
introduced  by  Goodman  Rotary  Radio 
Display  Specialties,  19  W.  34th  St., 
New  York  City.  The  whirling  dis- 
play gives  the  dealer,  a  chance  to 
play  the  set  while  in  motion  and  to 
use  concealed  lights  at  the  base.  The 
device  is  AC  operated  and  was  cre- 
ated and  developed  by  Edwin  E. 
Goodman. 


22 


Radio  Today 


•3olm$oiiJ\ 


nnounces 

A  GREAT  NEW  DEVELOPMENT 
IN  SPACE  COOLERS 


This  sensational  Space  Cooler  meets  the  demand  for  a 
simple  unit  to  successfully  air-condition  single  rooms. 
It  is  a  highly  developed,  self-contained  electric  refrig- 
eration plant  of  the  twin  cylinder  compressor  type.  Air  is 
circulated  over  cold  coils  where  it  is  cooled,  de-humidi- 
fied and  cleaned — then  distributed  throughout  the  room. 
It  offers  the  refreshing  comfort  of  a  mountain  cabin 
to  people  in  homes,  in  offices,  in  hospitals,  hotels,  clubs.  Its  popular 
price  brings  it  within  the  reach  of  thousands  of  doctors,  dentists, 
lawyers,  sufferers  from  hay  fever,  and  others  who  have  long  wanted 
a  DEPENDable  product  of  this  type. 

It  is  the  product  of  Johnson  Motors,  builders  of  the  world  famous 
Sea-Horse  Outboard  Motors,  household  electric  refrigerators  and 
other  products  of  outstanding  quality.  More  than  five  years  in  refrig- 
eration, with  many  notable  developments  to  its  credit,  have  given 
Johnson  a  perfect  background  for  this  latest  achievement. 

DISTRIBUTORS:  DEALERS:  The  Johnson  Space  Cooler  is  going 
places!  It  will  make  real  money  for  you — this  season.  Investigate! 
Distributors  and  dealers  are  signing  up.  Complete  information  will 
be  sent  to  you  immediately  upon  request. 

JOHNSON    MOTORS 
REFRIGERATOR  DIVISION,  2040  MONMOUTH  BLVD.,  GALESBURG.  ILL. 

Johnson  Space  Goolesi 


* 

HIGHLY  DEVELOPED 

COMPACT 

POWERFUL 

SELF-CONTAINED 

NO  WATER   P|pES 
TO  CONNECT 

NO  SPECIAL  WIRING 
TO  INSTALL 

SPACE   REQUIRED 
FITS  ON  WINDOW  SILL 

PLUGS  INTO  NEAREST 
LIGHT  SOCKET 

COOL,  CLEAN,  DE-HU- 
MIDIFIED AIR 


February,  1938 


23 


NEW  THINGS 

Latest  news  of  radio  products  from  the  manufacturers 


RCA  sets 

*  Push-button  type  AC  7-tube 
table  superhet  with  magic  eye  tube. 
Tunes  530-1720,  2300-22,000  KC  in 
3  bands.  4%  watts  output — AC 
operation.  20:1  vernier  straight 
line  dial.  Variable  tone  control. 
Tone  compensated  volume  control 
— AVC.  Walnut  and  maple  cabinet 
16%  inches  high.  Model  87T-2— 
list  $69.95. 


Low  cost  push-button  tuning 
table  set.  Uses  4  tubes  in  a  T.R.F. 
circuit.  Beam  power  output  of  1.5 
watts — AC-DC  operation.  Selects 
6  stations.  Walnut  finished  cabinet 
8  inches  high.  Model  94X-1— list 
$17.95. 


5-tube  superhet  with  clock  dial 
and  metal  tubes.  Power  output  of 
2  watts.  AVC— tunes  540-1720  KC. 
Iron-core  I.P.  transformers.  Dy- 
namic speaker.  Model  95T — list 
$22.50.  RCA  Mfg.  Co.,  Front  & 
Cooper  Sts.,  Camden,  N.  J. — Radio 
Today — see  also  advt.  p.  3. 


18-inch   bass-reflex  enclosures 

*  Enclosures  for  Jensen  18-inch 
and  auditorium  speakers  have  been 
designed  so  that  they  can  be  used 
with  speakers  now  in  the  field.  En- 
closure is  shipped  knocked  down. 
Use  of  bass-reflex  enclosures  does 
away  with  the  need  of  a  baffle  and 
gives  superior  reproduction.  Jen- 
sen Radio  Mfg.  Co.,  6601  S.  Laramie 
Ave.,  Chicago,  111. — Radio  Today. 


ditional  pick-up — list  $4.95.  Galvin 
Mfg.  Corp.,  4545  Augusta  Blvd., 
Chicago,  111. — Radio  Today. 


14- watt  sound  system 

*  Portable  type  sound  system 
with  14-watt  output.  Distortion 
held  to  within  2  per  cent  by  use  of 
inverse  feedback.  Features  full- 
length  mike  stand,  tone  control, 
two  PM  speakers  all  contained  in 
a  single  leatherette  carrying  case. 
Model  PA-714.  Webster  Co.,  5622 
Bloomingdale  Ave.,  Chicago,  111. — 
Radio  Today. 


Clarion  sound  system 

■*  Unified  sound  system  with  30- 
40  watt  output.  128  DB  overall 
gain.  Dual  12-inch  dynamic  speak- 
ers with  flare  baffles.  Velocity  mike 
with  floor  stand.  Beam  power  tubes 
with  inverse  feedback.  Electronic 
mixing — 2  hi-gain,  2  lo-gain  input 
channels.  Slate  gray  chassis  with 
streamlined  cover.  Bass  and  treble 
equalizer  controls.  Transformer 
Corp.  of  America,  69  Wooster  St., 
New  York,  N.  Y. — Radio  Today. 


Clipper  roof  aerials 

*  Streamline  type  of  auto  an- 
tenna for  roof  or  top  mounting. 
Chrome  plated  non-ferrous  metal — 
guaranteed  rustproof.  Bakelite  and 
chrome  fittings.  Model  M193  with 
cowl  lead-in— list  $3.95.  Model  F193 
for  cars  with  windshields  that  open 
— list  $3.95.  DeLuxe  models  M  and 
F194  is  extra  long  and  provide  ad- 


Emerson  5-tube  super 

*  Five-tube  superhet  model 
AU-190  listing  at  $29.95.  Two  bands 
cover  American  B.C.  and  police, 
amateur  and  aeroplane  stations,  AC 
operation.  May  be  had  with  special 
external  line  cord  resistors  for  op- 
eration on  150  volts,  230  volts  and 
250  volts.  Other  features  are  dy- 
namic speaker,  AVC,  tone  control, 
beam  power  tube,  gemloid  dial, 
built-in  antenna,  acoustically  con- 
structed molded  cabinet.  Emerson 
Radio  &  Phonograph  Corp.,  New 
York,  N.  Y. — Radio  Today'. 


Weston  test  oscillator 

*  AC-operated  servicing  oscilla- 
tor with  range  of  50  to  30,000  KC 
in  6  bands.  Hand  drawn  and  indi- 
vidually calibrated  scales.  No  trim- 
mer condensers  used.  Automatic 
amplitude  control  of  oscillator  out- 
put— calibrated  microvolt  outputs 
from  1  to  100,000.  Accuracy  of  1 
per  cent  on  shortwave  and  %  per 
cent  on  broadcast  and  I.F.  bands. 
400  cycle  modulation.  Jack  for  fre- 
quency modulator  when  using  os- 
cilloscope. Fully  shielded  construc- 
tion including  shielded  line  cord. 
Model  776.  Weston  Electrical  In- 
strument Corp.,  Newark,  N.  J. — 
Radio  Today — see  also  advt.  p.   29. 


Raytheon  amateur  tubes 

*     Triode  type  tubes  for  amateur 
transmitters.    Type  RK11  has  a  mu 


24 


Radio  Today 


of  20  and  output  of  55  watts.  Net 
$2.50.  RK12  is  a  zero  bias  triode 
with  55  watts  rating — net  $2.50. 
RK51  has  a  mu  of  20  and  170  watts 
output — net  $8.50.  RK52  is  a  hi  mu 
zero  bias  triode  with  135  watts  out- 
put— net  $8.50.  Raytheon  Produc- 
tion Corp.,  420  Lexington  Ave.,  New 
York,  N.  Y.— Radio  Today. 


Polarity  changers 

•  Vibrator  type  DC  to  AC  in- 
verter. Operates  AC  sets  or  devices 
on  DC  power  lines.  On  110  DC  a 
105-volt  AC  output  is  obtainable.  Ef- 
ficiency on  the  order  of  96  to  99  per 
cent.  Voltage  drop  of  %  volt  per 
50  watts  load.  Variable  output  fre- 
quency permits  adjusting  to  60 
cycles  under  load.  Units  designed 
for  load  not  exceeding  350  watts 
with  power  factor  over  75  per  cent. 
Electronic  Laboratories,  Inc.,  122 
W.  New  York  St.,  Indianapolis,  Ind. 
— Radio  Today. 


Noise  filter 

*  Plug-in  type  noise  filter  for 
reducing  radio  interference  caused 
by  small  electrical  appliances.  In- 
serted in  the  power  outlet — appli- 
ance or  radio  plugged  into  unit.  2 
inches  long  by  1%R  inch  diameter. 
S  p  r  a  g  u  e  Products  Co.,  North 
Adams,  Mass. — Radio  Today. 


Jefferson 
filament  transformers 

+  Transformers  designed  for 
filaments  of  rectifier  tubes.  Type 
464-461  supplies  5  volts  at  12  amps 
— 3000  volt  insulation.  464-451 
supplies  5  volts  at  20  amps — 3000 
volt  insulation.  Type  464-441  has 
a  10  volt  secondary  delivering  4 
amps. — insulation  rating  of  2500 
volts.  Jefferson  Electric  Co.,  Bell- 
wood,  111. — Radio  Today. 


Lafayette 
portable  PA  system 

*  Deluxe  20-watt  sound  system 
having  138.6  DB  gain.  Beam  power 
output  stage  with  inverse  feedback 
circuit.  4  input  channels  for  all 
types  of  mikes.  Mike,  amplifier, 
floor  stand  carried  in  one  case,  dual 
12-inch  speakers  carried  in  a  second 
case.  Neo-dials  provide  illumina- 
tion of  controls.  Will  handle  audi- 
ences up  to  2000.  Wholesale 
Radio  Service  Co.,  100  Sixth  Ave., 
New  York,  N.  Y. — Radio  Today. 


Recording  attachment 

*  Inexpensive  turntable  and  cut- 
ting head  for  instantaneous  record- 
ing. Handles  12-inch  acetate  rec- 
ords. Cutting  head  impedance  of  15 
ohms — v2  watt  power  required  to 
operate  cutting  head  at  full  ef- 
ciency.  2,000  ohm  pick-up  for  play 
back.  Housed  in  a  case  15  x  15  x  8 
inches.  List  $98.50.  Presto  Record- 
ing Corp.,  139  W.  19th  St.,  New 
York,  N.  Y. — Radio  Today — see  also 
advti  p.  48. 


Cabinet  touch-up  kit 

*  Kit  of  22  items  to  be  used  in 
polishing  and  touching  up  scratches 
on  all  types  of  radio  cabinets.  Con- 
tained in  small  leatherette  carry- 
ing case.  Philco  Radio  &  Television 
Corp.,  Tioga  &  C  Sts.,  Philadelphia, 
Pa. — Radio  Today. 


Belmont  push-button  set 

*  5-tube  AC  operated  single- 
band  table  set  with  lever  type  tun- 
ing for  5  stations.  Full  vision  dial 
—tune  535-1,720  KC.  5-inch  electro- 
dynamic  speaker.  Power  output  of 
1.4  watts.  Average  sensitivity  of 
about  25  microvolts.  Bakelite  cab- 
inet. Model  526.  Belmont  Radio 
Corp.,  1257  Fullerton  Ave.,  Chicago, 
111. — Radio  Today. 


Class  "B"  input  transformers 

*  C.H.T.  type  multi-match  input 
transformers  for  class  B  audio  am- 
plifiers. Variable  impedance  ratios. 
Types  T15D82  and  T15D83  operate 
from  a  500  ohm  line  and  handle  15 
and  30  watts  respectively.  Type 
T15D84  matches  6L6's  to  the  grids 
of  a  class  B  stage — also  has  tertiary 
winding  for  feedback  circuit.  Will 
handle  30  watts.  Thordarson  Elec- 
tric Mfg.  Co.,  500  W.  Huron  St., 
Chicago,  111. — Radio  Today-. 


Carbon  microphone 


+  Modernistically  styled  carbon 
microphone.  Double  button  type — 
internal  shock  absorber  mounting. 
Operates  on  3  — 15  milliamperes 
button  current.  Furnished  with  6 
feet  of  cable.  Model  75 — list  $7.50. 
Electro-Voice  Mfg.  Co.,  324  E.  Col- 
fax Ave.,  South  Bend,  Ind. — Radio 
Today. 


February,  1938 


25 


MORE  NEW  THINGS 


Ansley  dynaphone 

*  Electric  phonograph  with  3- 
tube  amplifier.  Crystal  pick-up 
with  curved  arm  to  provide  im- 
proved tracking.  Gray  airplane 
luggage  type  case  measuring  11% 
x  18  x  7V2  inches — weight  18  pounds. 
Model  D-26  for  AC  operation — list 
$44.50.  For  AC-DC  operation  list 
$49.50.  Ansley  Radio  Corp.,  240  W. 
23rd  St.,  New  York,  N.  Y—  Radio 
Today. 


-or3 

Solar  mica  capacitors 

*  Transmitter  type  mica  con- 
densers. Designed  for  high  volt- 
age and  heavy  RF  currents.  Clamped 
and  anchored  into  case — eliminates 
hum.  Hermetically  sealed  in  a 
glazed  porcelain  case.  Transmica 
condensers  available  in  all  usual 
voltages  and  capacitances.  Solar 
Mfg.  Corp.,  599  Broadway,  New 
York,  N.  Y. — Radio  Today — see  also 
advt.   p.   55. 


Radio-Tyrr.e  clock 

*  Clock  controlled  switch  de- 
signed for  turning  on  the  radio  at 
a  pre-determined  time.  Cord  on 
clock  plugs  into  power  line  and 
radio   set  into  a  receptacle  on  the 


clock.  Mercury  switch  assures  posi- 
tive action.  Spring-wound  clock 
works.  Gibb  Mfg.  Corp.,  216  N. 
Clinton  St.,  Chicago,  111. — Radio 
Today. 


Center-tap  resistor 

*•  Wire  -  wound  center  -  tapped 
resistors  having  molded  bakelite  in- 
sulation. Metal  strip  across  the  top 
extended  at  ends  serves  as  mount- 
ing bracket  and  assists  in  rapid 
heat  dissipation.  Unit  will  handle  5 
watts  when  bolted  to  chassis — 2]/2 
watts  in  open  air.  10  to  200  ohms. 
Type  MW-2J.  International  Resist- 
ance Co.,  401  N.  Broad  St.,  Phila- 
delphia, Pa. — Radio  Today — see  also 
advt.  p.  41. 


Onan  AC  power  plant 

*  Compact  5,000-watt  AC  power 
plant.  Self-excited  generator  with 
25  per  cent  continuous  overload 
capacity.  1,800  r.p.m.  15  h.p.  gas 
engine.  Available  in  manual  start- 
ing, remote-controlled  starting,  and 
fully  automatic  operation.  Electri- 
cally shield  to  prevent  radio  inter- 
ference. Weighs  only  575  pounds. 
Complete  with  all  accessories.  D. 
W.  Onan  &  Sons,  43  Royalston  Ave., 
Minneapolis,  Minn. — Radio  Today. 
See  also  advt.  p.  54. 


Micamold  mica  condensers 

*  Midget  type  bakelite  molded 
condenser  with  mica  dielectric. 
Made  up  of  metal  plates  that  are  in- 
tegral with  lead  terminals — clamped 
in  steel  channel.  Available  in  ca- 
pacitances from  2%  to  50  mmf.  Tol- 
erance can  be  held  to  plus  or  minus 
1  mmf.  Micamold  Radio  Corp.,  1087 
Flushing  Ave.,  Brooklyn,  N.  Y. — 
Radio  Today. 


Compact  electrolytic 

•*•  Etched-foil  type  electrolytic 
capacitor  of  extremely  compact 
construction.  Same  electrical  char- 
acteristics of  larger  units.  Both 
terminals  insulated.  Cardboard 
sleeve  insulates  container.  Her- 
metically sealed.  Type  BR — avail- 
able in  4.  8.  12,  16,  20,  40  mfd.  at 
150  bolts  DC  and  8  mfd.  at  450  volts. 
Cornell-Dubilier  Electric  Corp.,  S. 
Plainfield,  N.  J. — Radio  Today. 


*     ".  ,\  .*.  .'.  .JLiJK'-« 


Sprague  push-button  tuners 

+  Trimmer  condenser  type  push- 
button tuners  for  use  only  by  radio 
manufacturers  in  new  sets.  Units 
available  in  two  circuits  with  front 
or  back  adjustments,  with  four,  six, 
or  eight  buttons;  2x6  back  ad- 
justed unit  is  illustrated.  Three  cir- 
cuit types  for  back  adjustment  only 
with  six  buttons.  Units  available 
with  self-contained  changeover  or 
disconnect  switches.  Complete  draw- 
ings and  technical  data  available  to 
set  engineers.  Sprague  Specialties 
Co.,  North  Adams,  Mass. — Radio 
Today. 


24-watt  P.A.  system 

*  Portable  sonnd  system  with 
24-watt  undistorted  output.  Bass 
and  treble  tone  compensators.  Dual 
12-inch  speakers.  Input  channels 
permit  simultaneous  use  of  2  mikes 
and  phono  pick-up.  Modernistically 
designed  amplifier  with  choice  of 
colors.  Bell  Sound  Systems.  Inc., 
61  E.  Goodale  St.,  Columbus,  Ohio — 
Radio  Today. 


26 


Radio  Today 


February,  1938 


27 


MORE  NEW  THINGS 


If  nl  1 

■     ^^  inn  9M 

§ 

DeWald  5-tube  set 

*  AC-DC  table  type  radio  fea- 
turing "Wonder  Tone"  grille  which 
blends  high  and  low  frequencies  for 
even  distribution  throughout  the 
room.  Plastic  cabinet  in  walnut  or 
ivory  measuring  9  x  5%  x  6%.  Beam 
power  output  tube.  Model  530.  De- 
Wald Radio  Co.,  440  Lafayette  St., 
New  York,  N.  Y. — Radio  Today. 


Star  auto  radio  controls 

*  Control  unit  to  fit  all  cars — 
100  per  cent  universal.  Fits  all 
radios  regardless  of  tuning  ratio. 
Fits  all  condensers  regardless  of  ro- 
tation direction.  No  holes  to  drill 
or  file.  Adjustable  so  as  fit  all 
panel  thicknesses.  Custom  matched 
plates  to  fill  all  1935-8  cars.  Star 
Machine  Mfrs.,  13  E.  Bay  Ave., 
Bronx,  N.  Y. — Radio  Today — see 
also  advt.  p.    50. 


Halldorson  amplifier  kit 

+  35-watt  amplifier  kit  using 
beam  power  tubes  and  overall  in- 
verse feedback.  Uses  phase  inverter 
tube  and  has  microphone  mixing 
circuits.  Uses  vacuum  sealed  trans- 
formers. Instruction  sheet  fur- 
nished free  upon  request.  Halldor- 
son Co.,  4500  Ravenswood  Ave., 
Chicago,  111. — Radio  Today. 


Aircraft   microphone 

*  Universal  aircraft  microphone 
is  light  weight — 8  ounces  including 
the  cable,  body  is  of  dural,  instru- 
ment includes  a  special  press  but- 
ton switch  for  single  or  double  cir- 
cuit or  any  special  switching  ar- 
rangement that  may  be  required. 
Universal  Microphone  Co.,  Ingle- 
wood,  Calif. — Radio  Today. 


Hi-voltage  capacitors 

*  Filter  condensers  for  trans- 
mitters and  hi-power  amplifiers. 
Type  TX  illustrated  housed  in  com- 
pact rectangular  containers  with 
ceramic  stand-off  insulators.  Type 
TZ  supplied  in  round  metal  cans 
with  threaded  necks  for  inverted 
mounting  or  upright  mounting  us- 
ing a  ring  bracket.  Impregnated 
with  Mallory  compound  which  is 
not  a  wax  or  like  oils  now  used. 
Unusual  resistance  to  heat  and  ex- 
tremely stable  DC  resistance.  P.  R. 
Mallory  &  Co.,  Indianapolis,  Ind. — 
Radio   Today — see   also   advt.    p.   1. 


Ball  type  dynamic  mike 

■*■  Dynamic  microphone  having 
directions  and  non-directional  char- 
acteristics controlled  by  a  swivel 
bracket.  Ball  shaped  housing.  Sen- 
sitivity of  -52  DB.  50,000  or  200 
ohm  impedance.  Flat  frequency  re- 
sponse from  30-10,000  cycles. 
Equipped  with  cable  connector  and 
25-foot  cable.  Model  MK-35— list 
$34.50.  Transducer  Corp.,  30  Rocke- 
feller Plaza,  New  York,  N.  Y. — 
Radio  Today. 


Hush-tone  radio  control 

*  Remotely  operated  switch  for 
silencing  radio  set.  Permits  user  to 
control  the  volume  of  the  radio  at 
a  distant  point  by  merely  pressing 
a  switch.  Equipped  with  15-foot 
cord  on  a  self-tripping,  self-winding 
reel.  With  this  device  the  listener 
can  squelch  undesirable  announce- 
ments without  going  to  radio.  List 
$7.50.  Radio  Reel  Co.,  Washington 
Bldg.,  Tacoma,  Wash. — Radio  To- 
day— see  also  advt.  p.  45. 


:;;:^ 


Airmaster  auto  antenna 

*  Antenna  formed  to  fit  the 
contour  of  the  car.  Only  1%  inches 
high  with  flexible  wire  completely 
encased  in  molded  rubber  in  mod- 
ern design.  Runs  longitudinally 
along  the  entire  length  of  the  top. 
One  piece  construction — cemented 
to  top  of  car.  List  $4.95  to  $5.65. 
Renson  Products  Co.,  Conshocken, 
Pa. — Radio  Today. 


Magic-phone  interphone 

•  Two-way  wired  interphone 
system  for  2  stations — model  SP2 
illustrated.  On  and  off  switch,  vol- 
ume control,  and  talk  listen  switch. 
Uses  6V2  inch  PM  speaker.  Model 
SP4  is  a  master  system,  handling  4 
remote  stations,  and  model  SM5  is 
a  fully  selective  5  station  system. 
Comun-a-phone  Systems,  Inc.,  1175 
Broad  St.,  Newark,  N.  J. — Radio 
Today' — see  also  advt.  p.  56. 


Focussing  headlight 

•  Flash-light  type  focussing 
lamp  for  wearing  on  hat.  Ideal  for 
electricians  and  radiomen  when 
working  in  dark  places.  Powered 
by  five  flashlight  cells.  Battery  con- 
tainer fastens  to  belt  or  slips  in 
pocket.  Type  129.  Burgess  Battery 
Co.,  Freeport,  111. — Radio  Today. 


28 


Radio  Today 


-All  JL  C. 
THAT  HOLDS  ITS  ACCURACY 


(Individually  hand  calibrated  dials) 


bratedd^U  rs  used0 

trimmers  or  P 


new  WESTON  or 

cuVt.Tunm6os       oddo£S 

not  increase  or 
nal  stren&tn. 


4lW  or  sh»«  »  uit 

assured  by  A- ^e&u- 

^CuoS-nceo^ 
Utes  mutual 
oSdUatortube. 


°°**^o  Uue feedback 


LI  SW3 

50-200  KC  18-30  MC 

FREQUENCY  RANGE 


W0B8LER 

o 


40.    50     60 


0 

OUTPUT 

100 

LEVEL                 i 

^ffHBF"™" 

re 


WESTON    MODEL    776    OSCILLATOR 


MODULATION  CONTROL 


OUTPUT   MULTIPLIER 


The  above  4   features,  heretofore  available  only  in         additional  features  and  refinements.  In  addition,  it  has 
high  priced  laboratory  oscillators  .  .  .  yet  recognized         been  styled  to  match  other  recent  and  widely  popular 
as  essential  for  thorough  radio  servicing  .  .  .  now  are         instruments  in  the  WESTON  line.  You  will  want  all  the 
available  for  the  first  rime  in  a  practical  service  oscil-         facts  on  Model  7  76... a  serviceman's  oscillator  that  fully 
lator,  at  a  serviceman's  price.  The  new  WESTON          meets  WESTON'S  high  standards  of  accuracy  and  du- 
Model  776  Oscillator  gives  you  all  "four,"  plus  12         rability.The  coupon  will  bring  you  complete  literature. 

Weston 

Insfri/menfs 

Weston  Electrical  Instrument  Corp., 
597  Frelinghuysen  Ave.,  Newark,  N.J. 

Send  data  on  Model  776  Oscillator. 

MORE  NEW  THINGS 


Portable  receiver 

*  6-volt  and  110  AC  portable 
type  receiver.  6  tubes.  Tunes  550- 
1,500  KC  and  operates  from  short 
antenna.  Low  battery  drain  of  less 
than  3  amperes.  6-inch  PM  dy- 
namic speaker.  Variable  tone  con- 
trol. Housed  in  metal  case.  Mo- 
torola Companion — list  $49.50.  Galvin 
Mfg.  Corp.,  4545  Augusta  Blvd., 
Chicago,  111. — Radio  Today — see 
also  advt.  Cover  IV. 


Push  button  tuner 

+  Six  button  dual  circuit  trim- 
mer type  automatic  tuner.  Selects 
5  stations  and  has  disconnect  but- 
ton. Unit  connects  across  2-gang 
condenser.  Uses  three  wires  for 
connection.  Housed  in  metal  can 
for  installation  on  all  sets.  List, 
including  station  tabs — §6.60.  Auto- 
matic Devices  Mfrs.,  4243  W.  Ogden 
Ave.,  Chicago,  111. — Radio  Today. 


Univex  exposure  meters 

*  Low-cost  exposure  meter  for 
use  with  any  movie  camera.  Elim- 
inates guesswork  in  taking  movies. 
Automatically  compensates  for 
frames  per  second,  film  speed,  lens 
speed,  filter  factors,  and  type  of 
subject.  Also  a  photometer  for 
still  and  candid  cameras   is  avail- 


able. List  $1.95.  Universal  Camera 
Corp.,  32  West  23rd  St.,  New  York, 
N.  Y. — Radio  Today — see  also  advt. 
p.  44. 


Low-cost  sound  system 

*  Five-watt  sound  system  com- 
plete with  .  microphone,  tubes, 
speaker,  speaker  housing.  Complete 
unit  ready  to  operate  with  mike 
cable  and  stand.  Vocagraph  Model 
30-05— list  price  $50.  Electronic 
Design  Corp.,  164  N.  May  St.,  Chi- 
cago, 111. — Radio  Today. 


Harbray  P.B.  tuning  unit 

*  Condenser  type  push  button 
adapter  unit  for  use  on  any  receiver 
having  a  2-gang  condenser.  Unit 
has  a  self-contained  changeover 
switch  which  disconnects  condenser 
gang  and  cuts  in  the  switch  oper- 
ated trimmer  condensers.  Buttons 
are  available  for  5  stations,  and  a 
6th  button  operates  the  changeover 
switch.  Complete  with  escutcheon 
and  call  letters.  List  $7.50.  Har- 
bray Co.,  4701  N.  Sheridan  Rd.,  Chi- 
cago, 111. — Radio  Today — see  also 
advt.  p.  47. 


Howard  communications 
receiver 

+  12-tube  all-wave  receiver  de- 
signed for  communications  recep- 
tion. Tunes  540-65,000  KC  in  6 
bands.  Continuous  electrical  band 
spread  afforded  by  separate  3-gang 
condenser.  Has  tuned  R.P.  stage 
on  all  bands  except  5  meter.  Cali- 
brated "R"  meter.  Sensitivity  of 
1  microvolt  or  less  on  all  bands  ex- 
cept 5  meter  which  is  about  10. 
Dual  I.F.  channel— 1,560  KC  for  5 
and    10   meters— 465   KC   for   other 


bands.  Model  450— net  $100.45  in- 
cluding crystal  filter.  Howard 
Radio  Co.,  1731  Belmont  Ave.,  Chi- 
cago, 111. — Radio  Today. 


Hickok  photocell 

+  Dry-disc  self-generating  type 
of  photocell.  Designed  for  use  with 
a  microammeter  for  measuring 
light  intensities.  Housed  in  bake- 
lite  case — active  surface  1%  inches 
in  diameter.  Sensitivity  of  6  mic- 
roamperes per  foot  candle  of  light. 
Prong  spacing  fits  standard  4-prong 
tube  socket.  Hickok  Electrical 
Instrument  Corp.,  DuPont  Ave., 
Cleveland,  Ohio — Radio  Today. 


Auto  antenna  resonator 

+  Matching  resonator  designed 
to  coordinate  the  auto  antenna  and 
radio  sets  so  as  to  give  optimum 
performance.  Unit  is  a  tapped  in- 
ductance giving  the  choice  of  7 
inductance  values.  Antenna  can 
be  made  to  give  extra  gain  from 
50  to  500  per  cent  over  a  fairly 
wide  band  of  frequencies.  Type 
Ml— list  $1.50.  Radiart  Corp.,  113th 
St.,  Cleveland,  Ohio — Radio  Today 
—see  also  advt.  p.  54. 


30 


-      "V 


Radio  Today 


"II  «M" 

Radio's  Smart  Mone^  for 

1938 

is  on  FRANK  ANDREA! 


PUSH-A-BUTTON  SETS,  AS  ANDREA 
MAKES  THEM,  ARE  TROUBLE-PROOF 

JL  ush-a-button  tuning  can  be  as  sure,  ac- 
curate and  trouble-proof  as  dial  tuning.  Ad- 
vanced engineering  and  skillful  designing  can 
assure  such  operation.  Andrea  Push-a-button 
sets  have  proved  that! 

Inferior  automatic  tuning  can  cause  the  radio 
dealer  many  headaches,  can  increase  his  service 
costs  and  eat  into  his  profits.  But  that  is  not 
automatic  tuning  as  Andrea  makes  it  in  the 
popular  Andrea  Push-a-button  models. 

That  is  one  reason  why  radio's  smart  money 
for  1938  is  on  Frank  Andrea.  The  radio  trade 
knows  Frank  Andrea  as  a  leader  in  the  tech- 
nical development  of  radio  reception  for 
nearly  20  years.  They  know  the  high  quality 
receivers  made  by  F.  a.  d.  andrea,  inc., 
under  his  management  and  ownership  from 
1920  to  1932.  They  know  that  Andrea 
Radios,  manufactured  during  the  past  four 
years  exclusively  for  the  overseas  trade,  have 
already  won  a  reputation  throughout  the 
world  as  the  finest  sets  produced  in  America. 
It  was  inevitable  that  andrea  would  lead  in 
perfected,  instantaneous,  automatic  push-a- 
button  tuning. 

Frank  Andrea  ...  on  "Radio  Profits" 

Much  of  the  success  of  F.  A.  D.  Andrea,  Inc.,  under 
my  management  and  ownership  from  1920  to  1932  was 
due  to  our  close  cooperation  with  our  jobbers  and 
dealers  under  merchandising  methods  which  assured 
them  of  adequate  profits,  and  protected  them  from 
destructive  price  competition  and  end-of-season  dump- 
ing. Today,  Andrea  Radio  Corporation  continues  these 
same  sound  principles.  Your  inquiries  about  territories 
still  open  will  be  treated  in  complete  confidence. 

(signed)  f.  a.  r>.  andrea 


ANDREA  RADIO  CORP. 

4823  48th  Ave,  Woodside,  L.  I.,  N.  Y. 


fet  &&  These  Features/ 

SPECIFY    ^ 


y/  Exclusive  sidphur'free  molded  rubber  liner  elimi- 
nates chemical  corrosion  on  metal  parts — particular- 
ly contact  points. 

v/  Rubber  liner  consists  of  two  parts  beveled  to  make 
a  closer  fit  and  suppress  noise. 

■sj  Lower  liner  molded  to  fit  in  order  to  hold  mechanism 
in  position  in  center  of  vibrator  shield,  supporting 
leads  and  preventing  undue  vibrations. 

a/  Exclusive  flat  frame  provides  simpler  construction 
and  more  permanently  rigid  mounting  for  contact 
arms. 

•y/  Short  leads  are  clamped  and  held  steady  against 
vibrator  frame  eliminating  vibration  and  preventing 
breakage  of  leads.  Reduces  radio  interference 
usually  resulting  from  long  leads. 

y/ Tapered  reed  prevents  undue  strain  and  equalises 
bending  providing  longer  reed  life. 

yf  Special  design  provides  right  degree  of  wiping 
action  to  keep  pure  tungsten  contact  points  clean, 
but  not  enough  to  cause  excessive  wear. 

y/  Highest  grade  mica  insulators. 

y/  Stack  is  held  to  frame  with  TWO  screws  making  a 
mounting  with  less  likelihood  of  misalignment.  ^ 


BUENOS  AIRES  —  UCOA  RADIO  PRODUCTS  CO. 


16  YEARS  OF  LEADERSHIP 


February,  1938 


31 


AMPLIFIED  AUDIO 
SIGNAL  HERE  TO 
CHECK  SPEAKER 


AUDIO  SIGNAL 
HERE  CHECKS 
1st  A.E  STAGE 


I.F  SIGNAL 
HERE  CHECKS 
2nd    I.  F. 


AUDIO  OSC. 
HERE  CHECKS 
OUTPUT    AMP. 


I.F  SIGNAL  • 
HERE  CHECKS 
DETECTOR 


I.F.  SIGNAL 
HERE  CHECKS 
1st    I.F. 


R.F   SIGNAL 
HERE  CHECKS 
1st  DET.  AND 
OSCILLATOR 


R.  F.  SIGNAL 
HERE  CHECKS 
R.  F.  STAGE 


OUTPUT 
CHECKED 
BY  EAR 
OR  'SCOPE 


POWER 
SUPPLY 


A.  F.  SIGNAL  HERE 
CHECKS  ENTIRE  A.F. 
SYSTEM   OF    SET 


IN  CASE  DEAD  

OSC.  IS  SUSPECTED 
SUBSTITUTE  SIGNAL 
GENERATOR    LOOSELY 
COUPLED   TO    1st 
DET.  GRID  AT  PROPER 
OSC.  FREQUENCY. 


MODULATED 
I.  F.  SIGNAL 
HERE   CHECKS 
I.F.  DET.  AND 
AUDIO  OF  SET 


MODULATED 

R.F.  SIGNAL  HERE 

CHECKS   ENTIRE    SET 


Systematic  testing  using  dynatesting  methods  quickly  locates  defects  in  set. 

DYNAMIC  TESTING  OF  RADIO  SETS 

Rapid   stage  by  stage  analysis  to  localize  trouble.      A  method 
providing  for  tests  while  circuit  elements  are  normally  operating. 


By  Vinton  K.  Uleich 
Service  Editor 

*  MOST  servicemen  use  a  con- 
tinuity method  of  testing  radio  sets — 
which  may  be  likened  to  the  attempt 
to  analyze  auto-engine  trouble  when 
the  motor  is  not  running. 

Since  the  beginning  of  radio,  ser- 
vicemen have  been  taught  to  make 
use  of  continuity  measurements.  In 
the  days  of  battery  sets,  voltage  and 
current  analyses  were  made  without 
a  signal  applied  to  the  set. 

DC  or  static  measurements 

Later  on,  as  sets  became  more  com- 
plex, resistance  measurements  were 
advocated  and  books  were  written  on 
the  subject.  But  at  the  present,  re- 
liance is  placed  mainly  on  point-to- 
point  DC  voltage  measurements,  the 
assumption  being  that  if  the  voltage 
distribution  system  in  the  set  is  cor- 
rect, all  resistances  and  wiring  must 
be  satisfactory. 

But  in  the  present-day  receivers, 
resistance  in  itself  is  but  one  of  the 
factors.  The  real  item  to  be  con- 
sidered is  the  impedance  or  reactance 
of  the  various  circuit  elements — and 
these  are  items  which  must  be  checked 
at  the  frequencies  at  which  they  oper- 
ate. Hence,  if  we  are  to  use  these 
frequencies,  the  simplest  way  is  to 
have  the  radio  set  operating. 


Analysis  of  a  radio  set,  or  a  portion 
of  it  while  operating  under  specific 
conditions  imposed  by  the  service- 
man, is  dynamic  analysis.  This  dy- 
namic analysis  includes  a  check  of 
the  radio  tube  under  actual  operating 
conditions,  from  no-load  to  full-load, 
or  low  amplification  to  full  amplifica- 
tion. Naturally,  the  circuits  must 
not  be  disturbed  while  making  the 
tests — they  should  operate  normally. 

Specific  operating  conditions 

Dynamic  analysis  or  testing  is  used 
to  some  extent  in  alignment  processes 
and  in  other  tests.  But  it  is  not  be- 
ing used  100  per  cent. 

Naturally,  there  are  many  pro- 
cedures which  might  be  employed,  but 
the  one  to  be  outlined  herewith  has 
the  advantage  that  it  can  be  used  with 
any  type  radio  employing  any  type 
circuit.  Also  it  is  systematic  and 
when  followed  through  to  the  conclu- 
sion, the  serviceman  can  be  sure  that 
everything  is  operating  properly.  In 
other  words,  minor  defects  as  well  as 
major  ones  will  be  discovered. 

While  the  procedure  will  provide 
for  a  complete  test  of  the  receiver,  it 
will  not  consume  more  time  than  the 
present  hit-and-miss  methods,  for 
each  stage  can  be  rapidly  checked 
when  suitable  equipment  is  at  hand. 

Minimum  equipment  required  costs 
upwards  of  $100.00,  but  every  service- 


man has  some  of  the  units  on  hand. 
A  variable-frequency  signal-generator 
for  both  audio  and  radio  frequencies 
is  necessary  to  provide  a  signal  to 
provide  for  dynamic  operation  of  the 
radio  set.  And  to  measure  the  volt- 
ages in  all  the  stages,  both  AC,  DO, 
and  radio-frequency  voltmeters  are  re- 
quired. The  usual  AC-DC  multi- 
meter unit  and  a  vacuum  tube  volt- 
meter will  suffice,  although  an  oscillo- 
scope is  a  desirable  addition. 

Audio  analysis 

As  measurements  are  easier  at 
audio  frequencies,  since  the  voltages 
are  greater,  it  is  desirable  to  start 
analyzing  at  the  output  of  the  re- 
ceiver. And  after  each  successive 
stage  is  tested,  it  is  used  as  an  am- 
plifier to  simplify  testing  in  follow- 
ing stages.  The  speaker  is  the  last 
unit  in  the  receiver,  so  it  is  tested 
first  by  supplying  an  audio  signal, 
preferably  of  variable  frequency,  in 
order  to  test  the  unit  over  its  entire 
range.  Rattles,  distortion,  insufficient 
field  excitation,  hum  induced  from 
the  field,  and  the  like,  will  be  discoT- 
ered  by  such  a  test. 

Output  amplifier  troubles,  includ- 
ing poor  tubes,  improper  bias,  degen- 
eration and  defi  five  circuit  elements, 
will  be  found  upon  exciting  the  grid 
of   the  power   amplifier   stage.     And 


32 


Radio  Today 


the  loudspeaker  then  performs  as  an 
aural  indicator.  Likewise  excitation 
of  the  preceding  stage  will  show  up 
similar  defects  in  itself  if  present. 

Excitation  of  the  detector  at  I.F. 
frequency  will  give  the  answer  to 
any  defects  in  that  stage.  Variable 
audio-frequency  modulation  will  show 
up  distortion  appearing  in  the  de- 
tector. 

And  similarly  tests  progress  to  the 
antenna  stage.  Effectiveness  of  by- 
pass condensers  can  be  cheeked  by 
measuring  the  R.F.  voltage  present 
across   them. 

By  correlating  the  test  procedure 
and  symptoms  of  the  various  troubles, 
the  serviceman  will  know  just  what 
is  wrong  if  any  one  stages  does  not 
pass  the  test. 

Tube  analyzed  as  well  as  parts 

For  instance,  insufficient  emission 
in  a  power  output  tube  will  be  appar- 
ent as  the  volume  is  raised.  At  low 
volumes  the  set  will  be  okay — but  at 
high  volumes  the  peaks  of  the  audio 
waves  will  be  cut  off  due  to  insuffi- 
cient emission,  resulting  in  audible 
distortion.  Therefore,  as  the  output 
of  the  audio  signal  generator  is  raised 
distortion  will  occur.  Likewise,  too 
high  a  grid  bias  will  cause  the  same 
thing,  but  the  tube  has  already  been 
checked  by  substituting  a  new  one,  so 
there    is    no    confusion.      Also,    since 


each  stage  is  tested  separately,  there 
can  be  no  doubt  as  to  what  stage  the 
trouble  is  occurring  in.  Too  low  a 
bias  will  result  in  the  grid  of  the 
tube  going  positive  before  it  delivers 
its  full  load. 

Two  minutes  a  stage 

Insufficient  gain  caused  by  degen- 
eration will  be  apparent  at  once. 
Since  the  serviceman  knows  the  aver-' 
age  grid-voltage  driving  require- 
ments, any  excessive  amount  of  audio 
voltage  required  will  be  noticed.  Sub- 
stitution of  a  new  tube  which  should 
have  been  the  first  step  would  already 
have  uncovered  a  tube  with  low  am- 
plification capability.  Correction  of 
degeneration  due  to  insufficient  cath- 
ode by-pass  can  be  rapidly  accom- 
plished, without  the  necessity  of  hav- 
ing unsoldered  the  original  capacitoi 
and  tested  it. 

But  there  are  many  more  steps  in 
the  test  procedure  that  will  uncover 
themselves  as  the  method  is  evolved. 
The  main  feature  of  this  discussion 
is  pointed  out  that  a  single  test,  tak- 
ing maybe  two  minutes  a  stage,  will 
check  every  circuit  element  simul- 
taneously. There  is  no  need  of  test- 
ing half  a  dozen  separate  parts  and  as 
many  more  voltages.  If  the  stage 
works  perfectly,  then  everything  is  in 
perfect  order  and  requires  no  more 
attention. 


Also,  as  a  short  cut,  a  group  of 
stages  can  be  tested.  If  preliminary 
examination  indicates  that  the  trou- 
ble is  in  the  I.F.  end,  a  single  test 
of  the  entire  audio  system  will  assure 
the  serviceman  that  it  is  okay. 

Short  cuts 

Dynamic  radio  set  testing  is  far 
more  simple  to  perform  than  describe. 
Stages  of  the  radio  set  that  are  not 
defective  can  be  checked  almost  in- 
stantaneously, and  the  defective 
stages  can  be  located  almost  as 
quickly.  And  by  using  a  suitable 
dynamic  test  procedure  on  the  defec- 
tive stage,  the  causes  of  the  trouble 
can  be  quickly  localized. 

With  a  slight  amount  of  experi- 
ence, dynamic  testing  will  enable  the 
serviceman  to  check  radio  sets  and 
find  difficulties  even  when  circuit  data 
are  not  available.  It  is  not  so  much 
the  exact  elements  of  the  circuits 
used  by  the  manufacturer  that  counts, 
but  that  the  circuit  elements  fit  to- 
gether for  proper  operation.  And 
dynamic  radio  servicing  will  tell 
whether  or  not  the  circuit  as  a  whole 
is  operating. 

Coordination  of  elements 

As  an  example  of  proper  coordina- 
tion of  circuit  elements,  there  is  the 
case    of    one    manufacturer    using    a 
(Continued  on  page  38) 


SERVICE 
SECTION 


STROMBERC-CARLSON  MODELS  230  &  231 


I.E   PEAK  465  KC 


OSC. PADDED 
-  NUT  1800  KC 
.  SCREW     600  KC 


(■ 

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CATCH  LINES  FOR  APPLIANCES 

Headlines    for   newspaper   ads,    circulars,   letters,   etc. 


*  Addressing  the  buying  public 
on  the  subject  of  new  electrical  ap- 
pliances, dealers  have  learned  to  start 
out  with  something  which  has  a  spe- 
cial tug.  The  words  used  at  the 
head  of  an  advertisement,  whether 
it's  a  letter,  a  circular  or  a  newspaper 
display,  must  be  fitted  together  in 
1938  style. 

A  national  survey  of  appliance 
dealer  advertising  reveals  that  the 
majority  of  the  sales  phrases  are 
being  furnished  by  the  manufactur- 
ers. However,  dealers  often  branch 
out  to  make  an  appeal  which  is 
particularly  appropriate  to  their 
areas.  Some  of  this  work  is  striking 
and  full  of  promise. 

Herewith  are  listed  catch  lines 
from  dealers  in  all  parts  of  the  na- 
tion. Some  are  circulated  nationally 
by  manufacturers,  others  are  original 
with  the  appliance  shops  named : 

Take  the  Irk  Out  of  Her  House- 
work— McCurdy's,  Rochester,  N.  Y. 

Sale-of-the-Season  on  the  Mixer- 
of-the-Season — Higbee  Co.,  Cleve- 
land, O. 

Twice  As  Many  Things  at  Your 
Finger  Tips — L.  S.  Ayres  &  Co., 
Indianapolis,  Ind. 

Wake  Up  and  Live! — Florida  Light 
&  Power  Co.,  Miami,  Fla. 

The  World's  Cheapest  Per-Reason 
(for  owning)  Washer — Cumberland 
County  Power  and  Light  Co.,  Port- 
land, Me. 

Personal  Proof  in  Homes  Like 
Yours — Frank's,   Fort  Wayne,  Ind. 

Runs  Less,  Costs  Less  to  Run,  and 


Grunow's    J.    J.     Davin    shown 
with  new  Thermene  refrigerator. 


Proves  It — Central  Distributing  Co., 
Indianapolis,  Ind. 

Quiet  as  an  Okapi  (a  jungle  ani- 
mal)— New  Jersey  Public  Service, 
Jersey  City,  N.  J. 

Women  of  102  Cities  Told  Us  What 
They  Wanted — Poole's,  Wilmington, 
Del. 

The  Very  Acme  of  Cleanliness — 
Famous-Barr,    St.   Louis,   Mo. 

Discover  This  Refrigeration  Thrill 
— Goldman  &  Adamson,  Reading,  Pa. 

He  Turned  the  Switch  and  I  Was 
Surprised — Michael  &  Barron  Co., 
South  Bend,  Ind. 

Is  Your  Wife  Wrinkled  and  Faded 
From  Kitchen  Drudgery?  —  D'uke 
Power  Co.,  Winston-Salem,  N.  C. 

A  Hint  to  Husbands  —  Riedling 
Music   Co.,   Albuquerque,   N.    Mex. 


Give  Your  Home  That  Something 
Extra — Heslops,  Wheeling,  W.  Va. 

Enemies  of  Gloom — Union  Electric 
Co.,  St.  Louis,  Mo. 

You'll  Call  It  a  Miracle — Kansas 
City  Power  &  Light  Co.,  Kansas  City, 
Mo. 

Shop  While  the  Organ  Plays — 
Rhodes,  Seattle,  Wash. 

Ironing  Wear  You  Out? — Walford 
Electric  Co.,  Missoula,  Mont. 

Are  You  THINKING?  (of  a 
new  washer,  ironer,  etc.) — Wright 
Bros.  &  Rice,  Pomona,  Cal. 

At  Last,  a  Washing  Machine  That 
You  Can  Trust — At  a  Price  that  You 
Can  Afford— C.  F.  Wings,  New  Bed- 
ford. Mass. 

Washers  Will  Open  Her  Eyes — 
Modern  Appliance  Shop,  Saginaw, 
Mich. 

I'm  Earning  Money  at  Home — 
D'uke  Power  Co.,  Winston-Salem, 
N.  C. 

Her  Heart  Is  Where  Her  Home  Is 
— Hutzler  Bros.   Co.,   Baltimore,  Md. 

Elk's  Club  Kitchen  Is  All  Electric 
— Tacoma  Light  Depot,  Tacoma, 
Wash. 

Dangerous  Days  Ahead — Winne- 
mucca  Mercantile  Co.,  Winnemucca, 
Nev. 

A  Story  As  Fresh  as  the  Morning 
Headlines — Gimbel's,  Pittsburgh,  Pa. 

Career  Homes — Frederick  &  Nelson, 
Seattle,  Wash. 

Startling  News  About  Your  Iron- 
ing—Chas.  E.  Wells  Music  Co.,  Cas- 
per, Wyo. 


For  showing  a  slick  model  of  the 
"insides"  to  refrigerator  prospects. 


For    "elevating"   your   mer- 
chandise on  a  neat  platform. 


PLAN     YOUR 

Photos  from  a  new  Norge  film. 


h-Jtr 


Rushed  Across  the  Continent — 
Breuner's   Sacramento,   Calif. 

Carload  Purchase — Meier  &  Frank, 
Portland,   Ore. 

We've  Been  Waiting  Four  W eel's 
for  Afore  of  These — Sherer's,  Wor- 
cester, Mass. 

We  Present  to  the  Women  of  Sagi- 
naw— Walz  Hardware  Co.,  Saginaw, 
Mich. 

Ask  Your  Neighbor — She  Owns 
One — Finke's,  Evansville,  Ind. 

Small  Ironing  Problems — Camden, 
N.  J.,  Public  Service. 

As  Effortless  as  Rocking  a  Cradle — 
Rhodes  Bros.,  Tacoma,  Wash. 

Thrill  to  the  Thrift  of  Electric 
Cookery — Graybar  Electric  Co..  Allen- 
town,  Pa. 

Thoughtful  Husbands — Take  Note 
— Kay's  Dept.  Store,  Los  Angeles, 
Calif. 

You've  Got  Something  There — Dele- 
ware  Power  &  Light  Co.,  Wilming- 
ton, Del. 

Notice:  1938  License  Plates — Les 
Wheeler,  Buffalo,  N.  Y. 

You  Get  One  Full  Day  Off  Every 
Week — Hooper's,  Portland,  Me. 

Lectric  Lena — Narrangansett  Elec- 
tric Co.,  Providence,  R.  I. 

Demonstrations  Daily  at  Quacken- 
bush's  —  Quackenbush's,  Paterson, 
New  Jersey. 

Handsomer      Than      Evei Noth- 

nagle's,  Bridgeport,  Conn. 

The  Choice  of  9,000  Louisville 
Women — Ash  Your  Neighbor — Ben- 
singer's,  Louisville,  Ky. 

Paging  Mr.  Husband — Whose  Wife 
Hasn't  One  —  Philadelphia  Electric 
Co.,  Philadelphia,  Pa. 

■k  On  Feb.  22,  Frigidaire  will  open 
"the  fightingest  advertising  schedule 
the  company  ever  released."  The  drive 
will  include  newspapers,  magazines, 
outdoor,  window  display  and  radio 
spots,  and  according  to  Lee  A.  Clark, 
household  advertising  and  promotion 
manager,  will  be  centered  around  a  4- 
point  improvement  in  design.     One  of 


R.  E.  Densmore,  one  of  Norge's  sales 

veterans,    has    been    promoted    to    the 

post  of  general  field  sales  manager  for 

the  firm. 


the  features  of  the  campaign  is  a  "clos- 
ing weapon"  in  the  form  of  a  large 
money  bag.  It  dramatizes  the  four- 
way  savings  theme. 

*  Moser  &  Suor,  Inc.,  the  Norge 
jobbers  of  2609  Walnut  St.,  Kansas 
City,  Mo.,  have  changed  their  name  to 
Moser-Keller,  Inc.  J.  G.  Suor  has  an- 
nounced his  retirement;  Dan  Moser  is 
president,  Don  Keller  vice-president 
and  general  manager,  Tom  Condon  gen- 
eral sales  manager,  Paul  Dow  assist- 
ant sales  manager  in  charge  of  adver- 
tising and  sales  promotion.  Moser- 
Keller,  Inc.,  has  a  branch  in  Wichita. 
Kansas,  at  133  N.  Water  St. 

*  Progress  Corp.,  521  Fifth  Ave., 
New  York,  national  distributors  of 
Packard  Lektro-Shavers.  have  an- 
nounced winners  in  the  big  "Sales  and 
registrations"  contest  among  proprie- 
tors and  their  salesmen.  Lewis  Basch, 
Toledo,  Ohio,  was  first  prize  winner — 
a  Packard  8  sedan.  Thousands  of 
other  prizes  were  given  away  and  the 
firm  will  announce  a  new  contest 
shortly. 


+  Bendix  Home  Appliances,  Inc., 
will  spend  $691,000  for  cooperative 
newspaper  space  with  dealers  in  1938, 
in  addition  to  the  $1,000,000  already 
scheduled  for  national  advertising,  ac- 
cording to  advertising  manager  Wil- 
liam H.  Leininger. 


•k  Magic-Aire,  Inc.,  1734  Ivanhoe 
Road,  Cleveland,  Ohio,  is  a  new  com- 
pany recently  formed  to  take  over  the 
production  and  distribution  of  the 
Magic-Aire  line  from  the  Cleveland 
Suction  Cleaner  Co.  The  firm  recently 
added  a  new  low-priced  cleaner  to  the 
line. 

*  W.  Neal  Gallagher,  president, 
Automatic  Washer  Co.,  Newton,  Iowa, 
has  been  elected  president  of  the 
American  Washington  Machine  Manu- 
facturers' Association. 

•  R.  H.  McMann,  Inc.,  New  York 
City  distributors  of  Gibson  refrigera- 
tors and  Westinghouse  radios,  recently 
held  a  5-day  preview  of  the  new  Gibson 
Freezr  Shelf  boxes. 


*  Jason  Hurley  has  been  appointed 
national  field  sales  manager  and  placed 
in  charge  of  the  field  expansion  pro- 
gram of  the  Hurley  Machine  Co.,  Chi- 
cago, maker  of  Thor  household  wash- 
ers, ironers,  dryers,  vacuum  cleaners 
and  ventilating  fans. 


•k  The  new  district  headquarters 
for  Frigidaire  at  4  Cummins  Station, 
Nashville,  Tenn.,  have  opened  for  busi- 
ness, with  Fred  M.  Davison,  district 
manager,  in  charge.  Others  on  the  staff 
are  Virgil  Wingate,  John  Hopkins,  I. 
R.  Ogglesvy,  S.  M.  Marvick  and  Carl 
Hoebner. 

New  headquarters  for  Frigidaire  in 
Alabama  and  Northwest  Florida  were 
opened  at  600  N.  Seventh  St.,  Birming- 
ham, Ala.,  with  L.  W.  Curl  as  man- 
ager. On  the  staff  here  are  P.  S.  Den- 
nison,  Earl  Powell,  Marion  Robertson. 
Robert  Reid,  W.  F.  Anderson.  J.  C. 
Hartline  and  A.  M.  Felt  us. 

Frigidaire  held  36  sales  conventions 
in  key  cities  throughout  the  country 
in  January  and  February,  with  Frank 
R.  Pierce,  manager  household  divi- 
sion, and  general  chairman  of  conven- 
tions, supervising  the  activity. 


SALES     TIME 


For  using  actual  pieces  of 
glass  wool  in  sales  talks. 


For    demonstrating    1938    features 
as    a    series    of    surprise    gadgets. 

Stewart-Warner    photos    courtesy    Chicago    Film    Studii 


APPLIANCE 
ACTIVITY 


Johnson  space  cooler 


•k  Household  and  office  appliance  to 
lower  room  temperatures,  to  clean  and 
to  dehumidify.  Metal  cabinet  7x15x13 
in.  designed  for  window  sill.  Cooling 
is  done  by  circulation  of  outside  air 
over  an  oversize  condenser.  Electric 
motor  is  GE  rubber-mounted,  belt- 
tightener  type.  Fan  rated  as  handling 
nearly  200  cu.  ft.  of  room  air  per  min- 
ute. $159.50.  Johnson  Motors,  Refrig- 
eration Division,  Galesburg,  111. — 
Radio  Today — see  also  advt.  p.  23. 


Magic-Aire  cleaner 

*  New  addition  to  the  line  for- 
merly made  by  the  Cleveland  Suction 
Cleaner  Co.  is  the  low-priced  Model 
160.  For  general  use  in  cleaning  up- 
holstery, autos,  pillows,  mattresses, 
etc.  as  well  as  floors  and  high  places. 
Ball-bearing  110-volt  (standard)  motor 


mounted  with  dust  bag  on  4  non-mar- 
ring casters.  Eight-ft.  flexible  hose, 
and  a  25-ft.  cord  provide  large  clean- 
ing radius.  Floor  tool  plus  cleaning 
nozzle  for  other  uses  are  standard 
equipment.  $39.50.  Magic-Aire,  Inc., 
1734  Ivanhoe  Road,  Cleveland,  Ohio. — 
Radio  Today. 


Grunow  Thermene 

•k  New  line  of  gas  refrigerators 
includes  the  three  models  558G, 
658G  (illustrated  herewith),  and 
758G. 

Accompanying  diagram  shows  the 
cycle  of  operation  of  the  new  sys- 
tem. Arrows  identified  as  "No.  1" 
relate  to  the  first,  or  the  refrigerat- 
ing stage;  "No.  2"  relate  to  the  sec- 
ond, or  the  heating  stage;  and  "No. 
3"  to  the  cooling  stage. 

Model  658  has  14.2  sq.  ft.  of  shelf 
area,  makes  6  lbs.  of  ice,  has  a 
shipping   weight   of   485   lbs.     Sug- 


gested f.o.b.  factory  list  price, 
$199.50.  General  Household  Utili- 
ties Co.,  2638  N.  Crawford  Ave.,  Chi- 
cago, 111. — Radio  To^'Y. 

Air-conditioned  refrigerators 


Radio    men    find    it     easy    to    display 
smaller  items.     Here's  a  new  Univex. 


*  Continental  Corp.'s  line  for  1938 
includes  3  super  air-conditioned  mod- 
els, 2  deluxe  air-conditioned  models, 
and  7  conventional  models  with  con- 
ventional cooling.  Model  F-30,  shown 
herewith,  has  shelf  area  of  12.1  sq.  ft., 
5  ice  cube  trays  making  7.5  lbs.  of  ice, 
and  a  frozen  storage  capacity  of  55  lbs. 
Besides  the  featured  frozen  storage,  the 
model  has  balanced  humidity  control, 
eliminates  the  use  of  hydrators,  and 
provides  constant  air  movement.  List 
price,  $389.50.  Continental  Corp.,  Fond 
du   Lac,  Wis. — Radio  Today. 


Cool-Circle-Ator  table 


*  A  new  air  re-circulator  in  the 
form  of  a  table.  A  special  design  on 
the  blades  picks  up  cool  air  from  the 
floor  area  for  re-distribution.  All  me- 
chanical parts  are  enclosed  in  an 
ornate  grille.  Finished  in  brown  and 
ivory.  Top  is  removable  and  may  be 
used  as  serving  tray.  Kisco  Co.,  Inc.. 
4414  W.  Papin  St.,  St.  Louis,  Mo  — 
Radio  Today. 


For  intensive  sales  action  in  1938,  Paul 
H.  Puffer  has  been  promoted  by  Norge 
to    domestic    refrigeration    sales    man- 
agership. 


36 


Radio  Today 


HOME  APPLIANCES 


A****-1 


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CONCENTRATOR  GAS  AND 
ELECTRIC  RANGES  .  .  .  Advanced 
styling  plus  many  special  conven- 
ience features. 


AUTOBUILT     WASHERS     AND 
DUOTROL  IRONERS...  America's 

first  fully  styled  home  laundry  line. 


ROLLATOR    REFRIGERATION  .  .  . 

Protected  by  10-Year  Wlfej^f 
the  3 -moving-parts  Roll 
pressor. 


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February,  1938 


TP-5 


A    64-page    volume   on    appliance   selling   and    promotion. 
Describes    a    complete    plan   of  store  operation.   No  matter 
what  products  you   sell,   this   book   will   show  you   how   to 
make  more  money  in  the   appliance  business. 
____________ —  -  -i 

NORGE  DIVISION  Borg-Warner  Corp., 

'    I  660  E.  Woodbridge  St.,  Detroit,  Mich.  |; 

/  would  like  to  receive  a   copy  of  your  new  book  for  i 

appliance  dealers.  |; 

j    I     NAME 

'     ADDRESS  

CITY STATE \ 

I 

___«____-  —  —  —  —  —  —  —  -.  —  —  —  —  —  —  —  —  —  -  —  —  —  —  -• 

37 


DYNAMIC  TESTING 


because  of  the  number  of 
curves  and  combinations 
induing  it  possible  to  give 
my  customers  a  perfect 
control  at  all  times." 


Manager    Service    Dept. 
Broadway  Dept.  Store 
Los    Angeles,    Calif. 

Proud  as  a  peacock,  Old  Man 
Centralab  adds  this  West 
Coast  testimonial  to  the  hun- 
dreds he  has  received  from 
coast  to  coast  .  .  .  from  air 
lines  and  men  in  the  tropics. 
Wherever  you  are  .  .  .  that 
service  job  is  no  longer  a 
problem  if  you  solve  it  with 
CENTRALAB  Controls  and 
fixed  resistors. 

Get  the  New 
Volume  Control  Guide 


STANDARD  RADIDHM 


Gentsalab 


Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 

BRITISH    CELTRALAB,    Ltd. 

Canterbury    Road,     Kilburn 

London,  N.W.6,  England 

FRENCH  CENTRALAB  CO. 

118   Avenue    Ledru-Rollin 

Paris  XI,  France 


(Continued  from  page  33) 


Test  foF  overall  performance  of  a  stage. 
Effectiveness  of  all   ports  checked. 

Both  frequency  ond  voltage   output    of 
signal   generator   varied 

By  following  steps  of  a  definite  test 
procedure,  the  location  of  the  circuit 
defect   will   become   apparent. 


ep   "  AC  plate  voltage, 
eg    -  AC  grid  voltage. 
Zg   -  Impedance  of  input  cin 
Zp   -  Impedance  of   plate    lo 
Rk    -  Cathode  bias  resistor. 
Ck    -  Cathode    by-pass   cond 
Csg-  Screen    by-  pass    cond 
Cp   -  Plate  by-pass  condens* 
Eg    -  DC  negative  grid   bios 
Esg-  DC  screen    voltage. 
Ep   -  DC  plofe    voltage. 
Ek  -  DC  cathode   voltage. 


Dynamic  servicing  simultaneously  tests  all  values  of  parts  and  voltages  in  a  stage 

and  determines  if  they  are  working  together  for  best  results.     Time  required  for 

diagnosis  reduced  to  a  minimum. 


type  45  output  amplifier  with  a  56 
volt  bias  and  275  volt  plate  supply, 
while  a  second  one  uses  31J4  volts 
bias  with  a  plate  potential  of  180.  If 
the  manufacturer  has  chosen  the 
proper  output  load  resistance  and 
driving  voltage,  either  set-up  will  be 
okay.  Regardless  of  what  the  actual 
conditions  may  be,  dynamic  radio 
testing  will  indicate  whether  or  not 
these  operating  conditions  are  cor- 
rect. And  properly  used,  dynamic 
testing  will  also  tell  what  the  causes 
of  improper  operation  are. 

With  dynamic  testing,  the  service- 
man can  be  sure  that  the  radio  set 
is  operating  properly.  He  can  be 
sure  that  there  are  no  defects  left  to 
cause  a  complaint  within  a  few  days. 
Besides  insuring  better  quality  of  re- 
pairs, dynamic  radio  servicing  will 
save  time  in  the  diagnosis  of  radio 
sets. 

REPAIRING  &  REPLACING 
AUTO  RADIO  GABLES 

*  Fitting  new  auto  radio  cables 
and  casings  is  an  easy  task  if  the 
shop  is  equipped  with  a  remote-o- 
cable  replacer  tool. 

The  machine  manufactured  by  J. 
P.  D.  Mfg.  Co.  of  Brooklyn,  N.  T., 
will  remove  the  old  fittings  and  re- 
place them  on  new  shafts.  Also  it 
will  cut  the  flexible  shafting  to  the 
exact  length  and  swedge  it  to  prevent 
unraveling. 

With   an   assortment   of   shaftings, 


casings  and  fittings,  the  auto  radio- 
man is  ready  for  any  job.  It  is  pos- 
sible with  the  remote-o-cable  tool  to 
make  to  order  any  desired  flexible 
cable  to  fit  any  control  head  and  radio 
set.  And  just  as  important  is  the 
fact  that  the  job  can  be  completed  in 
a  few  minutes.  Also  standard  cable 
furnished  with  the  radio  sets  can  be 
shortened  to  eliminate  excess  length, 
permitting  maximum  tuning  effi- 
ciency. 

WHAT'S  A  D.B,? 

*  Do  you  know  when  the  vast 
system  of  telephones  was  still  in  its 
infancy,  electrical  engineers  realized 
the  need  for  a  unit  to  describe  the 
amount  of  attenuation  between  the 
transmitter  and  the  receiver?  They 
used  as  a  standard,  the  amount  of  at- 
tenuation or  "drop  in  voice  level"  of 
one  mile  of  standard  telephone  cable. 
This  was  termed  "a  transmission 
unit"  or  "T.  U." 

Later  the  name  was  changed  to  the 
"bel"  as  a  mark  of  honor  to  the  in- 
ventor of  telephone,  Dr.  Alexander 
Graham  Bell.  Within  its  limited  ap- 
plication, the  bel  proved  quite  satis- 
factory until  the  advent  of  the  "wire- 
less age,"  and  at  that  time  it  was  nec- 
essary to  decimate  the  bel  to  one-tenth 
of  its  original  value  and  this  new  unit 
was  called  the  decibel,  or  "one-tenth 
bel." 

The  decibel  does  not  represent  any 
definite  quantity   of  electricity,   such 


38 


Radio  Today 


RIDER  BOOKS  BANISH 

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8,000,000  Philcos.  Over 
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CATHODE-RAY  TUBE  AT 
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men. Information  on  Os- 
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336  pp.  $^50 

450  III *■ 


RIDERS 

Out  Front  Again" 

Soys  Service  Manager 
of  Set  Manufacturer 

"That  extra  HOW  IT  WORKS  section  with  the 
new  RIDER  MANUAL  Volume  VIII,  certainly 
puts  Rider  out  front  again!  It  makes  clear  by 
practical  example  the  underlying  theory  you 
must  understand  when  up  against  the  increasingly 
complicated  1938  receivers." 
Remember  I  Volume  VIII  includes  in  addition, 
1650  pages  of  essential  service  data  on  1715 
models  of  over  100  manufacturers — the  most 
comprehensive  service  information  available,  and 
the  price  is  the  same  as  lor  last  yeai — $10,001 
JOHN    F.  RIDER,   Publisher 

1440    BROADWAY 
NEW  YORK  CITY 


YOU    NEED  ALL 


MANUALS 


PINCOt 


THE  ONLY 

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TIME  NOW  FOR 
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SALES! 

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.  _  line     of     portable     electric     light, 

RED    TOP  power  and  battery-charging  plants, 

COMBINATION  A.C.-0.C.        ?£?*%  *°r  Guide  sale  and  big  profit. 

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Now  is  the  time  to  cash  in  on  this 
waiting  market.  Write  for  litera- 
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One  Line  for 
Every  Requirement 

"PINCO" — the  only  complete  power 

GnT  t\  nnnmv  plant  line!  Full  price  range;  100  to 
UliU  CKUWN  2000  watts:  alternating  or  direct 
HEAVY  DUTY  current;    air    or   water   cooled;    re- 

DnulI,D    df  mum  mote    control;     filter    and    ignition 

ruwEiK    riiAiwi  shielding;  push  button  starting. 

PIONEER   GEN-E-M0T0R   CORPORATION 

Oept.   No.   R-2B,  466  West  Superior  Street,   Chicago,   Illinois 

Please  send  me  complete  information  on; 

D  "RED   TOP"  □  "GOLD   CROWN"  D  Converters  □  Dynamotora 

Name    

Address     

Citj State 

February,  1938 


,BS   IEB 


'**>, 


THE  TUNG-SOL  CONSIGNMENT  PLAN 


f~tASfc — You  carry  an  adequate  stock 
of  the  long-established,  well-known 
brand  of  Tung-Sol  quality  tubes. 

Sec&ftd—  You  are  protected.  Only 
carefully  located  high  class  retailers 
who  maintain  prices,  can  qualify 
for  the  Tung-Sol  franchise.    ■ 

}MiA(L  —You  don't  pay  for  the  tubes 
until  they're  sold.  This  is  one  of  the 
outstanding  features  of  the  Tung-Sol 
plan. 


Our  ability  to  finance  dealers' 
stocks  is  utilized  to  make  them  Tung- 
Sol  Retail  Partners  in  fact  as  well  as 
in  name.  You  pay  no  premium  for 
this  financing. 

That  is  why  more  and  more  high 
class  retailers  are  writing  to  find  out 
if  they  can  qualify.  If  you  haven't 
already  inquired,  call  your  Tung- 
Sol  jobber-  If  necessary,  write  us  for 
his  name. 

TUNG-SOL 

^ana-flour  Radio  Qai>eA 

TUNG-SOL  LAMP  WORKS,  INC. 
Dept.  C  Radio  Tube  Division 

Sales  Offices:  Atlanta,  Boston,  Chicago,  Dallas,  Kansas  City, 
Los  Angeles,  Detroit,  New  York.  Gen'l  Offices,  Newark,  N.  J. 


39 


SERVICE  NOTES 


as  the  ampere,  or  does  it  represent 
any  definite  electro-motive  force  such 
as  the  volt.  It  does  not  represent  the 
power  introduced  into  a  circuit  or  the 
power  derived  from  the  circuit. 

It  does,  however,  represent  the  ratio 
of  the  power  gain  or  loss  in  a  circuit. 
All  decibel  measurements  use  as  a 
reference  point  "Zero"  D.  B.,  which 
is  considered  for  all  practical  pur- 
pose to  be  the  threshold  of  hearing, 
although  theoretically  this  is  incor- 
rect. Zero  D.  B.  is  considered  as 
being  .006  watt  (6  milliwatts)  and 
D'.  B.  meters  are  calibrated  to  measure 
zero  D.  B.  when  6  milliwatts  are  pres- 
ent on  a  500  ohm  line  at  1,000  cycles. 

ZENITH  MODELS 
6M193  AND  6M194 

*  The  6M193-4  are  auto  sets  with 
6  tubes.  6M194  has  external  speaker 
of  cowl  or  header  type.  6M193  has 
internal  speaker  unit. 

An  extensive  filter  is  used  in  the 
battery  line  to  keep  out  ignition  noise 
and  isolate  vibrator  hash.  A  full- 
wave  primary  vibrator  is  employed. 


All  cathodes  are  grounded  except 
the  6QTG  which  is  connected  to  a  pos- 
itive point  on  the  voltage  divider  to 
provide  grid  bias.  Fixed  bias  from 
across  the  audio  filter  choke  is  used 
for  biasing  the  other  stages. 

I.F.  alignment  takes  place  at  252^ 
KO.  Location  of  the  oscillator  and 
B.F.  trimmers  shown  on  chassis  lay- 
out. The  antenna  trimmer  is  ad- 
justed after  the  radio  has  been  in- 
stalled and  attached  to  the  aerial — 
align  on  a  BC  station  about  1,400- 
1,450  KC. 

STROMBERG-CARLSON 
MODELS  230  AND  231 

*  Seven  tubes  including  a  cathode 
ray  indicator  are  used  in  the  S-C 
230  and  231  receivers.  Circuit  shown 
on  page  33  is  conventional  except  for 
the  use  of  a  separate  diode  section  to 
operate  the  tuning  indicator. 

Mixer  screen  and  oscillator  anode 
voltages  are  obtained  directly  from 
the  rectifier  side  of  the  choke  coil, 
filtering  being  obtained  from  the  10,- 
000  ohm  series  resistors  and  asso- 
ciated filter  condensers. 


I.F.  amplifier  aligned  at  465  KC. 
Oscillator  trimmers  and  aligrunent 
frequencies  are  shown  on  chassis  lay- 
out. Series  oscillator  padders  located 
in  upper  right  part  of  chassis  layout. 
Xut  adjustment  for  police  band  at 
1,800  KC.  Screw  adjustment  for  BC 
band   at    600   KC. 

FAIR  REPAIR  CHARGES 

*  What  constitutes  a  fair  price 
for  repairing  a  radio  set  is  one  of 
the  serviceman's  biggest  problems.  If 
he  charges  too  much,  he  is  branded 
as  a  racketeer — and  if  he  doesn't 
charge  enough,  it  is  impossible  to 
make  a  decent  living  and  buy  that 
sorely-needed  new  equipment. 

Letters  from  servicemen  definitely 
show  that  they  are  interested  in  what 
are  fair  prices  to  charge.  Some  of 
the  servicemen's  organizations  have 
set  up  schedules  as  yardsticks. 

Dick  Mattison  of  Casa  Radio  Co. 
of  Brooklyn,  N.  Y.,  who  writes  a 
column  in  a  local  newspaper,  states 
that  the  average  cost  of  replacing  a 
volume  control  should  be  "$2.50, 
which  includes  a  fair  labor  charge." 
While  we  agree  with  his  statement 
that  it  is  best  not  to  attempt  to  repair 
a  faulty  control,  we  believe  that  his 
charge  for  this  item,  generally  speak- 
ing, is  too  low. 


ZENITH  MODELS  6M193  &  6M194 


SlilSlilE 


|6X5orOZ4 


I.F.    PEAK  252.5  KC 


First  of  all  a  control  lists  at  $1.50, 
except  for  the  cheapest  ones  at  $1.  In 
fact,  some  of  the  dual  units  may  list 
for  as  much  as  $2.50.  Of  course,  if 
Mattison  is  thinking  in  terms  of  a 
$1  control  and  having  the  customer 
bring  the  set  to  the  shop,  his  charge 
may  be  okay  if  he  has  a  low  overhead. 
But  there  is  the  possibility  that  the 
control  has  a  switch,  which  adds  an- 
other 50  cents  to  the  list  price  of  the 
unit. 

Up  in  Boston,  the  R.T.G.  recom- 
mends a  charge  of  $5.50  for  replace- 
ment of  the  volume  control.  If  the 
job  is  done  in  the  home,  without  re- 
moving the  set  to  the  shop,  the  cost  is 
$4.50,  and  if  the  customer  brings  the 
set  to  the  shop,  a  further  reduction 
brings  the  price  down  to  $3.50.  If 
other  parts  are  needed,  they  are  re- 
placed at  list  price  plus  $1  for  each 
additional  part  to  cover  labor.  Basic 
prices  range  from  $3.50  for  a  by-pass 
condenser  to  $11  for  a  power  trans- 
former in  a  9  or  10-tube  set. 

The  B.M.S.  basic  charges  advocated 
by  Philco  start  at  $1.50  for  labor  in 
replacing  a  volume  control  or  resistor 
to  $2.50  for  a  power  transformer. 
Parts  are  charged  for  at  list.  Trans- 
portation involved  in  picking  up  the 
job  at  the  customer's  home  is  extra. 

Figuring  in  all  overhead  such  as 
rent,  heat,  light,  cost  of  operating 
auto,  cost  of  test  equipment,  tele- 
phone, advertising  and  unproductive 
time,  a  serviceman's  time  is  worth  at 
least  $1.50  an  hour  if  he  is  to  be  paid 
about  $25  a  week.  And  picking  up 
and  delivering  a  customer's  radio  will 
average  an  hour.  Therefore  $1.50  to 
$2  for  transportation  is  not  excessive. 

Naturally  local  conditions,  such  as 
neighborhood,  competition  and  the 
like  will  determine  to  some  extent 
what  is  a  reasonable  price. 


PUSH-BUTTON  ADAPTER  UNITS 

*  Recent  widespread  use  of  push- 
button tuning  has  built  up  such  a  de- 
mand for  push-button  radios  that  the 
service  departments  of  dealers  and 
jobbers  have  requested  the  low-down 
on  how  to  use  the  new  units  on  exist- 
ing sets. 

While  it  is  the  consensus  of  opinion 
that  it  is  always  best  to  sell  new 
radios  with  push-button  tuning,  there 
are  instances  where  a  trimmer  type 
push-button  adapter  unit  might  be  ad- 
vantageously added  to  a  set. 

At  present  there  are  four  types  of 
push-button  adapter  units  that  are  de- 
signed for  installation  by  servicemen. 
The  first  type  is  the  converter  unit, 
which  employs  a  1st  det.-oscillator 
tube  and  has  trimmer  condensers  for 


SiUnt 
(lonnectot 


5-rinGei 

'  Knae  -fiction 

„  Sont&ct 


NO  SLIDE 
NO  FRICTION 

NO  NOISE 


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PERMANENTLY 

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SPECIAL    REPLACEMENT 

^7Z^^^  CONTROLS 

uritk  tka  A/aw  SILENT  SPIRAL   CONNECTOR 
plui  5-FINGER  "Kne«  Action"  ELEMENT  CONTACT 


Out  goes  noise  at  the  two  most  critical 
points  in  any  control ! 

Sliding,  metal-to-metal  contact  —  the 
most  common  cause  of  control  noise — is 
definitely  eliminated  by  the  latest  IRC 
engineering  triumph,  the  Silent  Spiral 
Connector.  Because  it  provides  positive, 
continuous  electrical  connection  between 
the  center  terminal  and  volume  adjust- 
ment arm,  there  is  no  chance  for  noise 
to  originate.  With  element  noise  also 
eliminated  by  the  famous  IRC  5-Finger 
"Knee  Action"  Silent  Element  Contact, 
you  have  double  assurance  of  the  smooth- 
est controls  you've  ever  used — controls 
that  are  quiet  and  stay  quiet ! 


GET  THIS  COCCI 
NEW  GUIDE     rifCC  I 

The  most  complete  guide  ever 
offered.  Contains  more  than  200 
pages  listing  IRC  Standard  and 
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practically  every  receiver. 


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MAKERS    OF  RESISTANCE    UNITS    OF    MORE    TYPES,   IN    MORE    SHAPES,    FOR 
MORE    APPLICATIONS   THAN   ANY   OTHER    MANUFACTURER    IN   THE   WORLD 


February,  1938 


41 


^ 


CHECK    THESE 
REASONS    FOR 

Jwcteased  SaleS 


MASTERUNIT 

TUBE 
TESTER 


Model  1210-A 
EALER  NET  PRICE 

$2200 


Tests  All  Types  of  Radio 

Tubes. 

A  Single  Unit . . .  Not  Part  of 

a  Compound  Tester. 

Portable  and  Flexible. 

Maximum  Protection  Against 
Obsolescence  .  .  .  Hard  to 
Misuse . . .  Simple  to  Operate. 

Additional  Co-related  Master 
Units  Can  Be  Added  as  Busi- 
ness Expands  or  Circum- 
stances Permit. 


•  Checks  all  types  of  radio  tubes. 
Direct  reading  (GOOD -BAD)  scale. 
Tests  for  shorts  and  cathode  leakage. 
Individual  tests  on  diodes  and  full 
wave  rectifiers.  Line  voltage  regula- 
tion. Housed  in  black  metal  case  with 
popular  wrinkle  finish.  Complete  with 
rectifier  tube  and  all  necessary  acces- 
sories.   DEALER    PRICE $22.00 

A  TRIPLETT  MASTER  UNIT 

One  of  a  series  of  co-related  single 
unit  testers;  made  in  standard  sizes; 
the  most  economical  method  yet  de- 
vised for  completely  equipping  the  all- 
around  radio  service  shop  with  high 
quality   instruments. 

SEE     VOL K     JOBBER 
WRITE   FOR    CATALOG 

•  pAecfafon' 

ELECTRICAL    INSTRUMENTS 

THE  TRIPLETT  ELECTRICAL  INSTRUMENT  CO. 
192    Harmon    Dr..    Bluffton,    Ohio 

□  Please  send  me  more  information  on  Model  1210-A 

□  I  am   also   interested  in    


Name  . 
Address 
City 


the  detector  and  oscillator  sections  of 
the  circuit.  This  unit  is  merely  con- 
nected to  the  antenna  post  of  any 
radio  set — either  superhet  or  tuned 
R.F.  With  this  unit,  no  changes  are 
required  in  the  radio  set.  Power  for 
the  filaments  and  plate  circuits  is 
derived  from  an  internal  supply. 

Adapter  unit 

The  second  type  of  unit  uses  a  GAS 
type  tube  with  R.F.  and  oscillator 
circuits  tuned  by  trimmer  condensers. 
The  plate  of  the  6A8  tube  is  attached 
to  the  plate  of  the  miser  tube  in  the 
radio  set.  When  push-button  tuning 
is  desired,  a  switch  kills  the  R.F. 
circuits  in  the  radio  sets  and  substi- 
tutes those  of  the  push-button  unit. 
The  circuit  of  this  unit  and  the  re- 
quired connections  are  shown  in 
Fig.  1.  This  unit  can  be  used  only 
on  a  superhet  receiver  with  a  suitable 
I.F.  frequency.  Like  the  converter 
type  unit,  this  adapter  unit  does  not 
connect  into  any  of  the  R.F.  circuits 
of  the  set. 

Change-over  switch 

Most  of  the  sets  having  push-button 
tuning  with  trimmers  use  a  switch  to 
connect  either  the  tuning  gang  or  the 
push-button  trimmer  unit  into  the  cir- 
cuit. This  is  the  third  type  of  unit. 
Fig.  2,  at  the  left,  shows  how  a  triple 
push-button  unit  is  connected  in  a  set 
having  an  R.F.  stage.  A  triple  pole 
double  throw  switch  selects  either  the 
condenser  gang  or  trimmers. 

If  the  receiver  is  a  3-gang  job  and 
it  is  desired  to  use  a  2-bank  trimmer 
condenser  unit,  the  change-over 
switch  is  connected  as  shown  in  the 
center  of  Fig.  2.  In  this  way  the 
R.F.  stage  is  by-passed  for  push-but- 


Fig.    1 — Circuit    used    in    the    adapter 
type   of  push  button   tuning  unit. 


ton  tuning,  although  100  per  cent  ef- 
fective for  manual  tuning. 

The  right  circuit  in  Fig.  2  shows 
the  connections  when  using  a  change- 
over switch  in  a  2-gang  receiver. 

Automatic  change-over 

A  variation  of  this  third  method 
is  shown  in  Fig.  3  (top).  Here  the 
change-over  from  manual  to  push- 
button is  accomplished  automatically 
in  the  push-button  unit.  The  manual 
button,  when  depressed  automatically, 
cuts  out  the  trimmers  and  substitutes 
the  condenser  gang  in  the  circuit. 

To  date  this  unit  is  made  only  in 
2-section  types,  so  if  it  is  to  be  used 
on  a  3-gang  set,  the  R.F.  stage  must 
remain  in  the  circuit  although  it  isn't 
tuned.  Consequently  its  use  is  not 
recommended  for  3-gang  sets. 


Fig.  2 — Typical  circuits  for  push  button  tuning  unit  when  using  a  separate  change- 
over switch.   Left  is  for  a  3-gang  set  with  3  sets  of  trimmers.     Middle  drawing  is 
for  dual  trimmers  on  a  3-gang  set.    Circuit  at  right  for  a  2-gang  set. 


42 


Radio  Today 


Paralleled  trimmer  unit 

The  fourth  type  of  push-button 
adapter  is  shown  in  Fig.  3  (bottom). 
It  is  a  dual  trimmer  type  and  works 
best  on  2-gang  sets.  In  operation, 
since  the  condenser  gang  is  not  dis- 
connected, the  dial  of  the  set  must 
be  turned  to  minimum  capacity.  Then 
the  trimmer  capacities  are  added  and 
tuned  for  station  selection.  If  the  set 
is  an  all-wave  job,  the  trimmer  unit 
should  be  connected  across  the  broad- 
cast coils  and  not  just  across  the  con- 
denser gang. 


Fig.    3  —  Top    shows    connections   for 

dual   unit   using   internal   change-over 

switch.  Bottom  circuit  shows  unit  with 

disconnect  switch. 

A  disconnect  switch  cuts  out  the 
trimmer  condenser  unit  when  manual 
tuning  is  desired.  However,  for  push- 
button tuning,  the  condenser  gang 
must  be  returned  to  the  same  position 
as  it  was  in  when  the  stations  were 
set  up  on  the  trimmers.  Connections 
for  the  unit  are  shown  in  the  accom- 
panying diagram. 

Alignment  necessary 

Realignment  of  the  set  must  take 
place  when  types  2  and  3  are  added 
to  a  set,  since  the  R.F.  circuits  have 
been  disturbed.  Align  with  the  switch 
in  the  manual  position  on  the  broad- 
cast band.  If  a  tapped  type  coil  is 
used  for  shortwave,  alignment  will  be 
necessary  also  on  that  band,  since  the 


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WITH  THIS  NEW  PROVEN 
SALES  and  PROFIT  MAKER! 


Here  is  the  consumer  tested  item  that  will  fit  into 
every  radio  dealer's  sales  picture.  From  coast  to 
coast  the  consumer  demand  for  movie  cameras  is 
increasing  and  the  radio  dealer  has  the  logical 
"set-up"  to  cash  in  on  this  demand. 

The  Sensational  J^ew 

IRWIN 

MAGAZINE  LOADING 
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The  new  Irwin  has  unequalled  sales  appeal!  LOW 
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TO  OPERATE!  No  other  movie  camera  selling  for 
less  than  $60.00  has  the  40  foot  Magazine  Loading 
feature.  No  camera,  regardless  of  price,  has  a  more 
beautiful  appearance.  Get  the  facts  .  .  .  descriptive 
literature  and  dealer  prices  sent  upon  request. 


THE  IRWIN  16mm  AIR  CONDITIONED 
"ZEPHYR"   PROJECTOR 


That  Lists  for  Only 


$18?° 


A  fitting  companion  to  the  Irwin  Movie  Camera. 
The  finest  low  priced  16mm  projector  on  the 
market.  Its  rugged  construction,  excellent  per- 
formance and  professional  appearance  place  it  far 
ahead  of  competition.  Takes  all  16mm  films. 

JOBBERS!  DISTRIBUTORS! 

If  you  serve  the  radio  and  electrical  dealer  we  have  a 
most  interesting  proposition  for  you  .  .  .  Tour  inquiry 
will  bring  full  details. 

IRWIN  CORPORATION 

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INTERNATIONAL  RADIO  CORPORATION,  ANN  ARBOR, MICHIGAN,  U.S.A. 


February,  1938 


43 


WHAT'S 

THE 
ANSWER 

To  Radio's 

"Off  Season" 

• 

SMART  retailers  are  "taking  up 
the  slack"  in  radio  business  by 
featuring  the  movie  outfit  every- 
body wants... the  only  one  every- 
body can  afford!  There's  no  ques- 
tion about  it!  UniveX  is  the 
answer  to  the  radio  man's  prayer! 

How  well  you  bridge  the  gap 
until  next  season  depends  on  how 
thoroughly  you  promote  UniveX 
—now!  And  remember,  every 
time  a  UniveX  customer  comes 
back  for  accessories  you  have  a 
chance  to  sell  him  other  products. 

Let  your  customers  know  your 
store  is  UniveX  headquarters— 
and  make  your  "off"  season  the 
biggest  you  ever  had! 

FAIR   TRADE    PROTECTED    IN    42    STATES 


LIFETIME 

MOVIE 

CAMERA 


LOWEST 
PRICED 

8mm. 

PROJECTOR 

$1495 


TESTED  SELLING  IDEAS 


Universal  Camera  Corp. 

32  West  23rd  Street,  New  York  City 

Will  you  send  me  tested  selling  ideas 
which  have  produced  volume  sales  and 
profits  for  other  radio  dealers.  I  under- 
stand there  is  no  obligation. 

Name 


Address- 
City 


SERVICE  NOTES 

distributed  capacity  of  the  circuit  has 
been  altered. 

All  the  leads  should  be  very  short 
since  they  are  carrying  radio  fre- 
quency energy.  Consequently,  the 
serviceman  must  exercise  judgment 
when  installing  the  push-button, 
adapter  units.  In  fact,  some  sets  are 
not  at  all  suitable  for  such  additions 
— here  again  the  serviceman  must  be 
careful   in  order  to   avoid  them. 

However,  there  are  many  old  trade- 
ins  that  might  be  moved  with  the 
aid  of  push-button  tuning — and  some 
of  the  unsold  sets  of  this  year's  pro- 
duction can  be  given  a  push  with 
push-button  tuning. 


BOOK  REVIEWS 

DATABOOK 

By  Raytheon  Production 
Cokp.'s  Engineers 

*  First  edition  of  Raytheon's 
pocket  Databooh  is  a  200-page  techni- 
cal manual  giving  data  on  all  the 
various  types  of  receiving  tubes. 


RSA  EXPANDS; 
CHAPTERS  ADDED 


Book  is  chock  full  of  characteristic 
curves  of  the  tubes  and  also  gives 
nominal  or  typical  operating  values. 
Dimensions  and  socket  layouts  for 
each  tube  are  given  on  the  page  with 
its  characteristics. 

Simplified  circuits  and  calculations 
are  contained  in  the  first  section  of 
the  handbook.  Also  there  are  in- 
structions for  making  use  of  the 
curves  and  sample  charts  are  drawn 
— see  accompanying  illustrations. 

Definitions  of  the  various  tube 
characteristics  and  terms  are  included 
for  the  serviceman.  Price  25  cents. 
Published  by  Raytheon  Production 
Corp.,  420  Lexington  Ave.,  New. 
York,  K  Y.— Radio  Today. 


Headquarters  of  Radio  Service- 
men of  America,  304  S.  Dearborn 
St.,  Chicago,  reports  that  the  fol- 
lowing chapters  have  affiliated: 
Manchester,  N.  H. ;  Boston,  Mass.; 
Newark,  N.  J.;  Binghamton,  N.  Y. ; 
Tri-County  Chapter  of  Johnstown, 
Penna. ;  Cleveland,  Ohio;  Detroit, 
Pontiac  and  Flint,  Mich.;  Chicago, 
Freeport  and  Peoria,  111.;  the  Inter- 
state Chapter  at  Davenport,  Iowa; 
Duluth  and  St.  Paul,  Minn.;  Okla- 
homa City,  Okla;  Waco,  Abilene 
and  Dallas,  Texas.  We  have  re- 
ceived, in  the  last  sixty  days,  re- 
quests for  affiliation  from  over 
1,800    individuals. 

The  officers  and  board  of  direc- 
tors are  now  working  under  the 
leadership  of  T.  P.  Robinson  of 
Dallas,  Tex.  A  general  election  is 
to  be  held  shortly,  at  which  time 
the  members  of  the  RSA  will  elect 
directors  to  represent  them  on  the 
national  board. 

"The  officers  and  board  of  direc- 
tors are  pleased  and  grateful  to 
have  received  such  wholehearted 
cooperation  and  support  from  every 
branch  of  the  industry,"  says  a 
headquarters  memorandum.  "Ser- 
vicemen are  further  assured  that 
this  organization  is  run  by  service- 
men entirely  for  the  benefit  of  its 
members." 

New  Jersey — The  Radio  Serv- 
icemen of  New  Jersey,  with  head- 
quarters in  Newark,  is  the  most  re- 
cent as  well  as  one  of  the  largest 
organizations  of  servicemen  to  pe- 
tition RSA  for  membership.  This 
group  is  cooperating  with  local  au- 
thorities in  and  around  Newark 
looking  towards  the  alleviation 
of  the  evils  caused  by  misbrand- 
ing of  radio  sets  by  unscrupulous 
manufacturers. 

This  newest  chapter  of  RSA  is 
under  the  direction  of  Carl  Rau- 
ber,  chairman;  Norman  L.  Andre- 
atta.  treasurer,  and  Albert  Fasa- 
nello,  secretary. 

Duluth — The  Associated  Radio 
Servicemen  of  Duluth  was  one  of 
the  first  groups  of  servicemen  in 
the  country  to  affiliate  with  RSA. 
Under  the  leadership  of  M.  O.  En- 
dresen,  president;  [Mr.  Eric  N. 
Holmlund,  vice  president,  and  Ed- 
ward J.  Durant,  secretary-trea- 
surer, a  drive  for  membership  is 
going  on. 

Cleveland — The  annual  meeting 
and  election  of  officers  was  held 
on  January  3rd,  at  which  time  the 
Cleveland  Chapter  elected  the  fol- 
lowing officers:  L.  F.  Bangunten, 
chairman;  Horace  M.  Ricks,  vice- 
chairman;  Joseph  Repar,  secre- 
tary; Rudolph  Trammell,  treas- 
urer. A.  J.Theriault  was  designated 
by  the  chapter  as  a  candidate  for 
the  national  board  of  directors 
from  that  district. 

Boston  —  Boston  Chapter  of 
RSA,  a  group  of  servicemen  rep- 
resenting the  old  IRSM  and  the 
old  RTG  of  Boston,  held  a  consoli- 
dation meeting  in  Boston  on  Jan- 
uary 10,  19  38,  and  voted  unani- 
mously  to   amalgamate   their   two 


44 


Radio  Today 


organizations  and  affiliate  with 
RSA  under  the  name  o£  Boston 
Chapter  of  RSA. 

The  following  officers  were 
elected:  President,  Al  Wells;  vice 
president,  W.  Staples;  secretary, 
Ingvar  Paulson. 

Chicago — Chicago  Chapter  of 
RSA  held  a  Set-chassis  Show  at 
which  fifteen  set  manufacturers 
displayed  their  latest  touch-tuning 
sets.  Engineers  connected  with 
these  manufacturers  were  on  hand 
to  explain  details  of  the  sets.  At 
the  meeting  January  23  the  fol- 
lowing officers  were  elected: 
Chairman,  Ray  Mason;  vice  chair- 
man, Lew  Evans;  secretary,  Rob- 
ert Storey;  treasurer,  S.  A.  Ga- 
zinski. 


NEW  BOOKLETS 


*  Aerovox  Corp.,  70  Washington 
St.,  Brooklyn,  N.  Y.,  has  a  new  wall 
chart  which  lists,  alphabetically  and 
by  model  numbers,  the  various 
standard  radio  sets  along  with  their 
condenser  requirements.  Copies  are 
available  to  those  handling  exact 
duplicate  replacements. 

*  "Where  Should  the  Radio  Ser- 
viceman Locate  His  Place  of  Busi- 
ness?" is  the  title  of  a  booklet  is- 
sued by  Supreme  Instruments  Corp., 
Greenwood,  Miss.  In  it  is  presented 
a  complete  discussion  of  the  idea  of 
locating  radio  service  shops  in  gar- 
ages; the  material  is  based  upon  a 
survey  among  garages,  servicemen, 
consumers. 

*  Ferranti  Electric  Co.,  Inc.,  30 
Rockefeller  Plaza,  New  York  City, 
in  a  new  booklet  announces  "aero" 
transformers  for  aircraft  and  port- 
able work. 

*  The  new  catalog  insert  issued 
by  Hickok  Electrical  Instrument 
Co.,  10514  DuPont  Ave.,  Cleveland, 
0.,  features  dynamic  mutual  con- 
ductance tube  testers,  zero  current 
voltmeters,  along  with  Hickok  oscil- 
lators, oscillographs,  modulators,  set 
testers  and  meters. 

•k  The  208-page  pocket  size  ser- 
vice manual,  published  by  Clarostat 
Mfg.  Co.,  285  N.  6th  St.,  Brooklyn, 
N.  Y.,  has  been  ordered  by  service- 
men in  such  numbers  that  the  sup- 
ply is  becoming  exhausted.  Prompt 
requests  for  the  book  will  still  be 
filled,  however. 

+  New  and  completely  revised 
catalog  of  32  pages  has  been  re- 
leased by  Stromberg  Carlson,  Roch- 
ester, N.  Y.  Besides  complete  lists 
of  replacement  parts,  the  book  con- 
tains other  SC  products  recently  in- 
troduced. 

*  Available  from  Radio  Supply 
Co.,  218  W.  4th  St.,  Charlotte,  N.  C. 
is  a  new  1938  radio  parts  and  pub- 
lic address  catalog. 

*  Pierson-De  Lane,  Inc.,  Los 
Angeles,  Calif.,  have  published  their 
first  catalog.  The  firm  manufactures 
and  distributes  PR  15  communica- 
tion receivers,  and  the  PR  15  UH 
special  police  receivers. 


Rescues  the   listener   from    overdone 
commercial   announcements 

#> 

A  brand  new  accessory  for  a 

tremendous  waiting  market ! 

#> 

HUSH-TONE  is  a  new  joy  to  the  listener — a  cure  for  the 
one  bane  of  radio. 

No  longer  can  the  boisterous  announcer  blast  his  way 
into  the  home.  For  Hush-Tone,  by  a  mere  press  of  the 
thumb,  cuts  him  down  to  a  whisper. 

Hush-Tone  is  a  compact  volume  control,  easily  installed 
on  a  table  model  or  inside  a  console.  It  includes  a  reel 
and  15  feet  of  cord  enabling  the  listener  to  take  the 
thumb-control  to  any  part  of  an  average  room.  The  reel 
is  self-winding  and  self -tripping;  hence  the  cord  goes 
out  of  sight  when  not  in  use. 

Read,  converse,  telephone.  No  need  of  getting  up  to 
tune  out  or  turn  off  objectionable  features.  Hush-Tone 
rules  the  ether  waves.  With  it,  good  programs  and 
proper  commercials  can  be  enjoyed.  It's  good-bye  to 
nerve-wracking  "blah". 

Jobbers    and     Dealers — Wire    or    write    for    the 
Hush-Tone    Proposition. 


RADIO  REEL  CO .,  Manufacturers 

TflCOMfl,  WASHINGTON 


List  $71° 


J 


EPENDABLE        RADIO 


February,  1938 


15 


FIVE-POINT 
PROGRAM 

For  Crowe 
On-the-Panel    Controls 

T7"OUR  Philco  Distributor— 
■*■  again  in  1938 !  —  has  a 
special  Crowe  Program  to 
help  you  increase  your  sales 
of  Auto  Radios. 

This  Crowe  Five-Point  Pro- 
gram insures  quicker  sales 
and  increased  profits  with 
Crowe  ON-THE-PflNEL  Kits 
— at  no  extra  cost. 

Crowe  1 938  On-the-Panel 
Kits  embody  these  features: 

•  Exact  custom  styling 

•  Official  Philco  specifications 

•  New  no-glare  dials 

•  Improved  anti-backlash  design 

•  Adaptable  to  any  car 

•  Quickly    installed — easily    moved 

Ask   for    Crowe    Bulletin    No.    205 


PARTS 

JOBBERS ! 

Enlarge     your     market — increase     your 
sales!    Radio    Dealers— New-Car    Deal- 
ers— Used-Car  Dealers.  ALL  need  Crowe 
On-the-Panel  Controls— for  moderniz- 
ing   or    changing    old    radios    from    car 
to    car. 

Ask  for 

Bulletin  No. 

206 

CROWE  NAME  PLATE  &MFG.C0. 

1775   Grace  Street 
CHICAGO,      ILLINOIS 


AUTO  RADIO 
ANNTENNA  LISTINGS 

(Continued  from  page  15) 


Ward  Products  Corp.,  1523  E.  45th  St.,  Clevc 

land,  Ohio. 
ST  $4.95 


No. 

Price 

Type 

Length  Inches 

Finish 

J.F.D. 

Mfg.  Co 

(continued) 

101N 

6.00 

Top 

52t 

Cr 

3075N 

5.00 

Top 

50 

Cr 

3040 

3.50 

FP 

96t 

Cd 

3010NE 

6.95 

Buick  RB  insulators 

3010 

5.50 

Buick  RB  insulators 

3020 

5.50 

Oldsmobile  RB  insulators 

Noblitt 

-Sparks 

Industries,    Columbus, 

Ind.— 

"Arvin'* 

AA 

$3.00 

RB 

Bl 

A2 

3.50* 

DH 

44 

Nr 

A4 

2.75* 

DH 

29-blt 

Nr 

A5 

3.65* 

DH 

20-43t 

Nr 

A6 

3.65* 

Cowl 

29-50t 

Nr 

A7 

4.45* 

Cowl 

29-63t 

Nr 

A8 

4.95* 

Top 

21-36t 

Nr 

A9 

3.45 

RB 

Ru 

Philco  Radio  &  Television  Corp.,  Tioga  and  C 

Sts..  Philadelphia,  Pa. 
45-2632     $4.00*   Cowl      27-50t  Nr 


45-2568 
45-2615 
45-2617 
45-2470 
45-2184 


4.00*   Top 
4.00*    RB 
5.00*   Cowl 
3.75*   Cowl 
6.00     RB 


NS 
NS 
62t 
54 

NS 


Nr 
Nr 
Nr 
Nr 
NS 


RCA  Mfg.  Co.,  Front  and  Cooper  Sts.,  Camden, 
N.J. 


9823  $4.95  Top 

9825  3.65  Cowl 

9793  3.50*  DH 

9827  2.75*  DH 

9605  2.60*  RB 


21-36t 
29-50t 
51 
30-5  It 

NS 


Nr 
Nr 
Cr 

Nr 

NS 


Radiart 

C3 

C3NL 

C4 

Cb 

C6 

H4 

H5 

H6 

R3 

R4 

R5 

R6 

R7 

R7C 

Bl 

B2 

Ul 

U2 

U3 

U4 

U5 

U6 

LI 

L2 

L3 

L4 

L6 

L7 

L8 

Ml 


Corp. 

$4.95* 
4.45 
2.75 
2.95 
3.95 
3.75 
2.75 
3.50 
6.00 
5.25 
4.95 
4.25 
3.95 
4.75 
2.75 
2.75 
2.95 
3.75* 
3.00 
3.80* 
NS 
NS* 
.95 
.80 
.80 
.95 
.90 

.50 

NS 
1.50 


Shaw  Ave.,  Cleveland,  Ohio. 
Cowl  24-60t 
24-60t 
31-51t 
31-51t 
24-50t 
18-43t 
31-5H 
42 


Cowl 

Cowl 

Cowl 

Cowl 

DH 

DH 

DH 

Top 

Topf 

Top 

Topt 

Topt 

Top 

FP 

FP 

RB 

RB 

RB 

RB 

RB 

RB 


84 

50 

50 

20-36t 

20-36t 

96t 

84t 

49 

49 

49 

49 

49 

66"shieldedlead-inwithconnector 
36"  shielded  lead-in  with  connector 
32"  shielded  lead-in  with  connector 
42"  shielded  lead-in  with  connector 
Shielded  header  lead-in  for  R5 

aerial 
36"    shielded    lead-in    for    cowl 

aerials 
Short  lead-in  for  Arvin  radio 
Antenna  matching  resonator 


Topstreem,  Inc.,  1330  Nicollet  Ave.,  Minneapolis, 
Minn. 


TC 
TS 
TH 

THW 
TTW 
TSB 
TWO 


$5.50  Topt     48 

4.95  Topf      48 

5.50  Top 

2.50  DH 

3.50  Cowl 

4.25  Top 

3.50  Top 


48 
48 
52t 
72 


Cd 

Cd 

Cd 

Cr 

Cr-Cd 

Cd 

Cr-Cd 


United  Motors  Service,  Detroit,  Mich. — "Delco" 

4144  Top  Cr 

4145  Topf  Cr 
4067  $5.50  RB  Ru 

4151  2.45  DH       32-5H  Cr 

4152  4.45*  Cowl      24-60t  Cr 

4078  6.95  RB  insulators  for  '37-'38  Buick 
4118            4.00  RB  insulators  for  '37-'38  Buick 

4079  5.50  RB  insulators  for'37-'38  Oldsmob. 


CODES 

DH — Door  hinge   mounting. 

Top — Top  of  car  roof  mounting. 

RB — Under  running  board  mounting. 

Cowl — Mounts  at  side  of  car  just  front  of  door. 

t — Telescopic   construction. 

Cr — Chromium  plated. 

Cd — Cadmium  plated. 

Nr — Non-rusting  metal. 

Ru — Rubber   covered. 

Ss — Stainless   steel. 

Bl — Black  enamel 

NS — Information  not  stated. 


SU 

AL36MT 

CON 

FL 

FT 

AL36M 

MS 

MR 

MA 

AL36MS 

CO 

QS 

QR 

Q7 

AL36MS 

HPR 

4RC 

AL66 

BF 

PD 

AL13 


5.35 

.70 
2.75 
3.50 
3.65 

.70 
3.75 
3.50 
4.45 

.90 
1.95 
3.95 
3.65 
4.45 

.90 
4.00* 
2.95 

.85 
3.50 
17.50 
2.50 


Top       21-36t 

Topt     21-36t 

Recommended  lead-in  for 

DH        29-5  It 

DH       44 

DH        20-43t 

Recommended  lead-in  for 

Cowl     60 

Cowl      27-47t 

Cowl      24-62t 

Recommended  lead-in  tor 

DH        44t 

Cowl     61 

Cowl      29-50t 

Cowl      29-63t 

Recommended  lead-in  for 

RB 

RB 

Recommended  lead-in  for 

FP         96t 

FP         120t 

Recommended  13-ft.  lead- 


Nr 

Nr 
above 

Nr 

Nr 

Nr 
above 

Nr 

Nr 

Nr 
above 

NS 

Nr 

Nr 

Nr 
above 

Ru 

Ru 
above 

Nr 


MANUFACTURERS  OF  AUTO  RADIO 
CONTROLS  AND  PARTS 

CROWE  NAME  PLATE  &  MFG.  CO.,  1749  Grace  St.. 

Chicago,  m.,   ''Crowe" — Control  heads  &  dials. 
DUAL    REMOTE    CONTROL   CO.,    722S   Warwick   St.. 

Detroit,  Mich. — Dual  controls. 
J.  F.  D.  MFG.  CO.,  4111  Ft.  Hamilton  Pkwy.,  Brook- 
lyn,  N.   T.,    "JFD" — Flexible  shafts,  fittings,   and 

replacement  tool. 
STAR   MACHINE  CORP.,  Huntspoint  &  E.  Bay  Are., 

Bronx,  N.  Y. — Control  heads  &  dials. 
F.  W.   STEWART   MFG.   CORP.,   340  W.   Huron  St, 

Chicago,  HI. — Control  heads  &  dials. 
UNIVERSAL  CONTROLS,   INC.,  2107  40th  Ave.,  Long 

Island  City,  L.  I.,  N.  Y. — Control  heads  &  dials. 
S.   S.   WHITE    DENTAL    MFG.    CO.,   Industrial   Div.. 

10  E.  40th  St.,  New  York,  N.  Y.— Flexible  shafts. 


MANUFACTURERS  OF 
VIBRATORS 

AMERICAN  TELEVISION  &  RADIO  CORP.,  12S  E. 
10th  St.,  St.  Paul,  Minn.,   "Atr". 

ELECTRONIC  LABORATORIES,  INC.,  122  W.  New 
York  Ave.,   Indianapolis,   Ind.,    "Electronic". 

P.  R.  MALL0RY  &  CO.,  INC.,  3029  E.  Washington 
St.,    Indianapolis,    Ind.,    "Mallory". 

OAK  MFG.  CO.,  711  W.  Lake  St.,  Chicago,  HI.. 
"Oak". 

PAULEY-JAMES  CORP.,  4619  Ravenswood  Ave.,  Chi- 
cago,   111.,    "Vibrapowr". 

RADIART  CORP.,  Shaw  Ave.  at  133rd  St.,  Cleveland, 
Ohio,    "Radiart". 

UTAH  RADIO  PRODUCTS  CO.,  820  Orleans  St.,  Chi- 
cago, IU.,  "Utah". 


MORE  NEW  BOOKLETS 

•  A  lively  booklet  on  selling 
Arvin  auto  radio  has  been  issued 
in  a  new  form  by  Noblitt  Sparks 
Industries,  Inc.,  Columbus,  Ind.  It 
outlines  the  existing  market  for 
car  radio,  lists  the  "where  to  sell" 
spots,  presents  the  Arvin  budget 
selling  plan,  explains  display  and 
demonstration,  etc. 

•  Shuler  Supply  Co.,  902  Poy- 
dras  St.,  New  Orleans,  La.,  have  is- 
sued an  elaborate  90-page  catalog 
with  complete  listings  of  radio  parts 
and  amateur  supplies. 

•  A  booklet  titled  "1938's  Most 
Beautiful  Line  of  Auto  Radio  An- 
tennae and  Auto  Radio  Accessories" 
has  been  issued  by  Insuline  Corp.  of 
America,  25  Park  Place,  New  York 
City.  The  firm's  latest  types  of  an- 
tennae are  completely  described  and 
illustrated,  along  with  noise  sup- 
pressors and  the  new  Duplex  Filter- 
volt. 


46 


Radio  Today 


r 


RADIO'S    LATEST 
SENSATION 

HARBRAY 

AUTOMATIC  PUSH    BUTTON 
TUNING    UNIT 


it  mm^n 


mmtm  m 


■  s  t  ■  .■  «r 


Modernize  Radio  Receivers 

Easy  to  install,  only  a  few  wires  to  con- 
nect —  Can  be  used  on  any  Superhetero- 
dyne —  Compact  in  size  —  Complete  in- 
structions and  set  of  Call  Letters  for  all 
Broadcasting  Stations  in  the  U.  S.  A.  with 
every  kit. 

JOBBERS 
Protected   Territory   Now    Being  Allotted 
DEALERS — Modernize    Your    Inventory 


Sample  Unit  will  be  sent 
Prepaid  lor  $3.97.  $7-50 
Send  Check  or  M.O.       *  List 


HARBRAY    COMPANY 


V. 


Exponents   in 
Radio,  Television  and  Kindred  Lines 
4701-13  N.  Sheridan  Rd.,  Chicago 
80  Sth   Avenue,    Sew   York 
Tel.  W Atkins  »-S125 


*  To  be  had  from  Aerovox  job- 
bers or  direct  from  headquarters  at 
70  Washington  St.,  Brooklyn,  N.  Y., 
is  an  entirely  new  edition  of  the 
company's  industrial  capacitor  man- 
ual. It  gives  ratings,  required  ca- 
pacities, power  factors,  other  engi- 
neering and  servicing  dope  on 
motor-starting  capacitors.  Self-cal- 
culating charts  are  included. 

■*•  Now  available  to  servicemen 
and  dealers  is  a  new  bulletin  by 
Wright-Decoster,  St.  Paul,  Minn.,  on 
"Method  of  Connecting  Extra 
Speaker  to  Radio."  The  publication 
is  number  A17,  following  the  popu- 
lar A16,  which  is  "Methods  of  Cal- 
culating Load  Impedance  and  Power 
Division  for  Multi-Speaker  Installa- 
tions." 

*  New  price  sheets  for  the  new 
Triplett  testers  and  instruments 
have  been  issued  by  Triplett  Elec- 
trical Instrument  Co.,  Bluffton, 
Ohio.  Sheet  numbers  are  46T  and 
461. 

*  Bulletin  500,  on  the  subject  of 
switches,  is  now  being  sent  by 
Shallcross  Mfg.  Co.,  Collingdale,  Pa. 

*  J.  W.  Miller  Co.,  5917  S.  Main 
St.,  Los  Angeles,  Calif.,  have  just 
issued  a  6-page  bulletin  describing 
their  hand-pass  true  fidelity  R.F. 
tuner  kit.  Illustrated  with  circuits 
and  chassis  layouts.  A  second 
bulletin  which  describes  the  new 
dual  wavetraps  is  also  available  on 
request. 


20 

distinctive  models 


TOPPERS 
HINGE  WHIPS  ::  SIDE  COWLS 
BUMPERS,  ETC. 

AUTO 

AERIALS 


SWIVEL-TOP —  At  right  above  is  shown 
the  "ORIOLE"  ALL-BRASS,  triple  chro- 
mium plated  swivel  model,  19-35  inches; 
scientifically  designed  to  give  more  power 
and  less  static. 

HINGE  TYPE— We  offer  5  new  hinge  mod- 
els, telescopic  or  non-telescopic,  60  to  96-in. 
extensions;  BRASS  and  "chromalloy"  all 
triple  chromium  plated,  guaranteed  rustproof. 

Complete  illustrated  catalog  of  Auto  Antenna 
and  Auto  Radio  Accessories  on  request. 

INSULINE  CORP.  of  AMERICA 

25  PARK  PLACE  NEW  YORK,  N.  Y. 


Take  Up  the 

Industry's  New  Slogan  - 


A'SIGN-OFF"FOR\ 

CONVERSATIONS 
and  LETTERS 


THE 

'BIG   ANNUAL] 
.HOMECOMING] 

FOR    ALL 


&flC0Q 


.M**°" 


JN&*5 


.DE*&5 


JOBBERS  •  REPRESENTATIVES  •  MANUFACTURERS 


a* 


THE   ONLY  TRADE  SHOW  IN  1938 k 

SPONSORED  BY  RADIO    MANUFAC  TURERS  ASSN  , 
AND  SALES  MANAGERS  CLUB 


==    FOR  PARTICULARS  WRITE  = 

RADIO  PARTS  MANUFACTURERS  NATIONAL  TRADE  SHOW 

53  WEST  JACKSON  BOULEVARD CHICACO.ILLINOIS 


t&MMBWB   GI-RLS..HZS  HE2E 
1  **■  TIX  THE  &AD/0 


The  radio  service  man  must  do  his  work 
quickly  and  do  it  right  if  he  is  going  to 
make  money  and  build  a  list  of  satisfied 
customers.  The  use  of  dependable  replace- 
ment parts  that  do  not  fail  are  a  big  help. 
That  is  why  so  many  successful  service  men 
are  using  the  parts  described  in  Circular  507. 

WARD  LEONARD  ELECTRIC  CO. 

40  SOUTH  STREET,  MOUNT  VERNON,  N.  y. 

Please  send  me  your  Service  Man's  Circular  No.  507. 

Name 

Address 

City Slate 

Jobber's  Name 


February,  1938 


47 


W  hen  you  let  a  customer  hear  his  voice 
recorded  on  the  PRESTO  JUNIOR  RE- 
CORDER, he  is  amazed  to  find  that  he  has 
never  known  how  his  own  voice  sounds. 
You've  shown  him  something  new  about 
himself.  You've  aroused  his  curiosity.  And 
this  novelty  —  this  personal  appeal  —  ac- 
counts for  the  phenomenal  sales  of  Presto 
records   and   recording  instruments. 

W  hen  you  become  a  Presto  dealer  you 
get  a  large  exclusive  market  for  yourself. 
You  get  factory  leads  resulting  from  an 
expanding  national  advertising  campaign. 
You  have  available  the  services  of  a  trained 
factory  man  who  actually  helps  you  sell 
recording  equipment. 

C  inally,  when  you  sell  a  Presto  Jr.  re- 
corder you  make  a  legitimate  profit.  The 
list  price,  $149.00,  is  the  selling  price. 
Presto  manufactures  to  meet  the  demand, 
there's  no  distress  stock  ...  no  over- 
production. 


PRESTO  DEALERS  MAKE  MONEY.  YOU 
CAN  MAKE  MONEY  ON  THE  PRESTO 
LINE.  GET  STARTED  NOW.  WRITE 
TODAY     FOR     DEALER     PROPOSITION. 


PRESTO 

RECORDING 
CORPORATION 

137  WEST  19th  St. 
NEW  YORK,  N.  Y. 


SALES  AID 


ANTENNA  PARTS  ON  PARADE 


■*  To  aid  dealers  to  convince 
their  customers  that  an  antenna  is 
not  just  a  piece  of  wire,  Stromberg 
Carlson  has  brought  out  a  new  kit 
display  panel.  For  store  use,  it 
shows  all  the  actual  parts  of  the 
firm's  No.  5  Perfected  Antenna  Kit. 

The   panel    is   metal,    finished   in  ' 
gray.      It    has    a    chromium    frame 
and  colors   to  match  the   packaged 
antenna  kit,  which  is  also  shown  in 
the  display. 

CANDID  CAMERA  SHOTS  FOR 
YOUR  CUSTOMERS 

+  On  dozens  of  stations  throughout 
the  nation  spot  announcements  are 
being  used  to  invite  listeners  to  go 
to  their  RCA  dealer  and  get  packets 
of  candid  camera  photos.  These  are 
pictures  taken  by  expert  NY  photogra- 
phers, of  Metropolitan  Opera  stars,  and 
tie  up  with  RCA's  sponsorship  of  the 
opera   series. 

Window  posters,  billboards  and  store 
displays  are  also  part  of  the  promotion 
tie-up  on  the  weekly  broadcasts. 

PANELS  FOR  AUTO  AERIALS 


*  For  the  walls,  counters  or 
windows  of  radio  stores  promoting 
1938  auto  aerials,  The  Radiart 
Corp.,  Shaw  Ave.  at  E.  133rd  St., 
Cleveland,    0.,    has    produced    new 


Model  600  &  700  Model  500 

SHORT    WAVE    CONVERTERS 
FOR   CAR   RADIOS 

Can  be  attached  to  any  car  radio.  Has  on  and  off 
switch.  Does  not  affect  the  reception  on  the  stand- 
ard broadcast  bands.  MODEL  600^covers  49,  31, 
25,  20,  19  and  16  meter  bands.  Designed  for  re- 
ception of  American  and  Foreign  short  wave  broad- 
cast. Especially  adapted  to  use  in  tropical  countries 
and  the  more  remote  ports  of  the  world.  Distance 
range  5000  to  10000  miles.  A  very  attractive  unit. 

List   Price    $24.95 

MODEL  700 — Long  wave  converter  covers  135  to 
410  Kc.  Used  in  U.  S.  to  receive  government 
weather  reports,  ships  at  sea,  etc.,  in  cars  and 
boats  of  the  water  front  districts.  Designed  also 
for  use  in  Europe  and  Asia. 
List   Price    $24.95 

For    T_'se    of    Police    and    Other    Law 
Enforcement   Officers 

MODEL  100 — Police  converter  with  fixed  condenser. 
Covers  1500  to  2600  kilocycles.  List  Price  $11.95 
MODEL  200 — Police  converter  with  variable  con- 
denser and  illuminated  dial.  Covers  1500  to  5500 

kilocycles.    List  Price    $17.95 

MODEL  500 — Police  converter  with  two  metal 
tubes,  variable  condenser  and  illuminated  dial. 
Very   sensitive.     Exceptional   distance   range.     List 

Price     $21.95 

ALL  WAVE  ANTENNAS— Model  A— Hinge  Mount 
telescopic,  60  in.  long.    List  Price $3.50 

JOBBERS  AND    DEALERS  WANTED 

ABC   RADIO   LABORATORIES 

33E4    X.    Xew    Jersey    Street 
Indianapolis,   Indiana,   V.   S.   A. 


£  SPACE-SAVING — that's  the  prime 
feature  of  the  new  CLAROSTAT 
MIDGET  CONTROL.  Only  1VS"  in 
diameter  by  Yi"  (without  switch)  or 
13/16"  (with  switch).  Yet  this  small 
control  will  do  everything  the  large 
control  does,  PLUS  fitting  into  very 
tight  places.  That  makes  it  a  more 
universal  control.  And  ideal  for  ser- 
vicemen's requirements. 

TSfew'MAJVUAI.... 

Pocket-sized.  Over  20S  pages  of  control 
ami  resistor  replacements  for  all  makes 
and  models  of  sets.  Also  abundant  ser- 
vicing notes.  Free  on  request  —  from 
your   jobber   or   from   us    direct. 


CLAROSTAT 


•>nr,  Xorlh  Sixth  St, 
llrooklvn.  X.  Y. 


48 


Radio  Today 


displays    on   which    actual   samples 
are  used. 

Each  panel  features  one  type  of 
aerial  and  has  drawings  of  others. 
They  are  brightly  painted  in  four 
colors  and  show  the  merchandise 
against  an  illustration  of  the  side 
of  a  car. 


AUTO  RADIO  PROMOTION  KIT 

■*  A  big  promotion  kit  for  dis- 
play and  demonstration  of  the  1938 
auto  radio  is  now  offered  free  of 
charge  by  Philco.  The  kit  includes 
a  full-size  demonstration  display 
board,  a  5-ft.  metal  sign  for  outdoor 
use,  a  10-ft.  lithographed  cloth  ban- 
ner and  enough  consumer  folders 
to  cover  all  the  dealer's  prospects. 

Featured  throughout  the  promo- 
tion outfit  is  Philco's  new  low  price 
on  Model  920. 


SAMPLES  OF  CABINET  WOODS 


ayHAPItONI . 


*  A  new  type  of  sales  help  is 
being  issued  by  Ansley  Radio  Corp., 
New  York  City,  using  actual  pieces 
of  the  woods  from  which  the  firm's 
Dynaphone  cabinets  are  made. 

Samples  of  both  light  and  dark 
walnut  are  used  in  the  display, 
forming  an  attractive  contrast  and, 
of  course,  illustrating  exactly  what 
the  cabinet  finishes  are  like.  The 
item  is  suitable  for  either  window 
or  counter  use  and  is  available  free 
from  headquarters. 


*  The  latest  edition  of  Kenyon 
Engineering  News,  840  Barry  St., 
New  York  City,  is  an  illustrated 
discussion  of  "Experimental  Tele- 
vision Circuits." 

+  Now  available  from  jobbers  is 
Philco's  new  tube  manual.  Featured 
in  its  64  pages  are  special  drawings 
of  socket  layouts  of  all  Philco  sets. 
Also  tube  characteristics,  schematic, 
base  layouts  and  dimensions  are 
included. 

+  The  Magnavox  Co.,  Fort 
"Wayne,  Ind.,  is  issuing  engineering 
bulletins  monthly  or  more  often  if 
possible.  The  first  was  a  capacitor 
bulletin  on  "A  High  Capacity  Filter 
Circuit";  the  most  recent  one  is  a 
speaker  bulletin  on  "Instructions 
for  Installing  Cone  and  Voice  Coil 
Assemblies  in  Magnavox  Speakers." 

■*  General  Electric,  Schenectady, 
N.  Y.,  has  released  two  new  bul- 
letins. The  first  concerns  Pyranol 
treated  radio  transmitter  capacitors 
for  amateur  equipment,  and  the  sec- 
ond deals  with  the  DC  Pyranol  ca- 
pacitors for  radio  and  X-ray  equip- 
ment, impulse  generators  and  other 
direct  current   applications. 

•  Ohmite  Mfg.  Co.,  4835  "W. 
Flournoy  St.,  Chieago,  111.,  an- 
nounces Bulletin  No.  108,  covering 
Riteohm  "71"  Vitreous  Enameled,  1 
per  cent  accurate,  1  watt  Resistors, 
and  Riteohm  "81,"  1  per  cent  accu- 
rate, vacuum-impregnated,  non-  in- 
ductively pie-wound  precision  resis- 
tors. It  contains  tabular  listings 
of  stock  sizes  and  handy  engineer- 
ing information. 

•  Tro-Mo  Radio  Co.,  Inc.,  85  Cort- 
landt  St.,  New  York  City,  a  supply 
house  representing  a  list  of  some  60 
manufacturers,  have  released  a  1938 
catalog  listing  "everything  in  radio." 
Presented  among  the  items  in  the 
booklet  is  the  new  line  of  Elgin  preci- 
sion instruments. 


•  Allied  Radio  Corp.,  833  W.  Jack- 
son Blvd.,  Chicago,  111.,  have  issued 
four  catalogs  for  use  in  foreign  coun- 
tries: (1)  "Everything  in  Radio  for 
1938"  with  an  introduction  in  Spanish, 
(2)  the  same  catalog  in  English,  (3) 
a  folder  on  Knight  radios  for  1938  in 
Spanish,  and  (4)  the  same  folder  in 
English. 


ALADDIN 

Announces  a   Perfected 

AUTOMATIC 
Push-Button  TUNER 


Designed  For  STABILITY, 

and   Elimination  of 

Frequency  Drift 

The  simplicity  of  operation  and  excellent  perform- 
ance of  this  ALADDIN  Automatic  Tuner  can  be 
attributed  to  the  following  combination  of  features: 
EASE  OF  ADJUSTMENT— Only  ONE  adjustment 
per  station  is  required  and  it  is  easily  made 
from  the  FRONT  of  the  panel.  Note  illustration 
shows  these  adjustments  ore  located  exactly  above 
the  push-buttons,  allowing  simple,  speedy  access 
for  station  selection,  even  by  the  layman. 
STABILITY  OF  OPERATION— Inductance  tuning 
is  used  throughout  in  combination  with  stabilized 
fixed  condensers.  This  provides  a  greater  degree 
of  tuning  stability,  elimination  of  frequency 
drift,  and  better  uniformity  of  operation  of  any 
band.  A  new  type  coil-switch  assembly  insures 
accurate  tracking  in  all  positions. 
PRECISION  WORKMANSHIP  ANO  OUALITY 
MATERIALS— Great  care,  engineering  skill  and 
quality  materials,  comparable  to  those  used  in 
the  fabrication  of  fine  precision  instruments,  are 
used  in  the  making  of  this  ALADDIN  Tuner. 
MANUFACTURERS — Increase  the  sales  appeal 
of  your  reeceivers  by  including  ALADDIN  Auto- 
matic Tuning  in  your  1938  nrodels. 
DEALERS  —  Insist  upon  ALADDIN  Automatic 
Tuning  in  your  new  receiver  lines.  Its  simplicity 
of  operation  enables  your  customer  to  make 
station   changes  himself. 

For  Complete  Details 
WRITE,    TELEGRAPH   or    CABLE 

ALADDIN  RADIO  INDUSTRIES  Inc. 

466t  W.  Superior  St.,  Chicago,  HI.,  U.S.A. 

Licensee  of  Johnson  Laboratories,  Inc. 

These  devices  manufactued  under  one  or  more  of  the  following 
U.  S.  Letters  Patents  1,887,580  1,940,228  1,978,568  i,97%->m 
1,978,600  1,982,589  1,982,690   1,997,45}   2,002,(00  2,082,190 

2,005,20}  2,018,626  2,028,SJ4  Z,0}2,(So  2,0)2,gl4  2,OJJ,4J9 
2,0(1,012  2,0(9, J9J  2,0S2,S87  2,082,(89    2,082,S95      2  094,189 

2,092,420.  Other -patents  pending. 


JFD  1938  Auto  Radio  Antennas 


15  MOST  POPULAR  TYPES 

Double  grip  all  rubber  covered 
running  board  antennas  .  .  .  Cowl 
antennas  .  .  .  Four  different  top- 
pers —  fit  all  cars  .  .  .  Door  hinge 
antennas  .  .  .  Bumper  antennas 
.  .  .  Special  insulators  for  Olds- 
mobile  and   Buick  cars. 


Ask 

for  Our 

Complete 

Catalog 


J.  F.  D.       OLDSMOBI 
Manufacturing 
Company 

4111  Ft.  Hamilton  Pkwy. 

Brooklyn,   N.   Y. 

Export  Dept. 

116  Broad  St.,  New  York 

U.S.  A. 

Cable:  ICARAD,  N.  Y. 


February,  1938 


49 


AUTO  RADIO  CONTROLS 

Simplest  of  All  to  Install 

THE   ONLY   CONTROL   WITH   ALL 
RATIOS    SELF-CONTAINED 

Works    Clockwise    or    Counter    Clockwise 

With   Same   Dial 
Absolutely  \o  Back-Lash 
No  Cord,  ]Vo  Cable,  Positive  Gear  Drive 
No  Mutilating  of  Instrument  Panel 
100%    Universal  in  Every  Way 
No  Excessive  Stock  to  Carry        fa 
One  Control  Fits  Them  All 


Complete  Line  of  1934-35-36-37  and 
4l\nn  Custom  Matched  Eseutchcon 
1M  III  Plates  With  Edge  Illuminated 
IwtlU     Non-Glare    Glass   Dials. 


Chrysler    1938 


Chevrolet    1938 


Send   For  New  illustrated  Catalog  No.  381 


STAR  MACHINE  MANUFACTURERS, inc. 

13  EAST  BAY  AVENUE  -  BRONX,  N.  Y 


JOBBERS  ON  THE  JOB 


*  Jobbers  in  Eastern  Pennsyl- 
vania, Delaware,  Maryland  and  Vir- 
ginia are  interested  in  the  fact  that 
Andrea  Radio  Corp.  has  appointed 
Wilmer  (Bill)  Trinkle  as  factory 
representative  in  that  area.  Trinkle 
is  an  able  engineer,  but  also  a  vet- 
eran sales  expert  with  a  wide  ac- 
quaintance. His  headquarters  are 
at   1438    N.    13th    St.,   Philadelphia. 

*  Fischer  Distributing  Corp., 
New  York  City,  have  added  Howard 
Radio's  push  button  adapters  to 
their  stock  of  prominent  lines.  Mil- 
ton Fischer  is  president;  Sam  Kav- 
esh  vice-president. 

*  Neiv  Jersey  Radio  Distribut- 
ing Co.,  266  Fifteenth  Ave.,  New- 
ark, N.  J.,  is  now  the  distributor  for 
DeWald  radios  in  that  city  and 
vicinity,  according  to  an  announce- 
ment by  Pierce-Airo,  Inc.  The  New- 
ark firm  will  handle  only  DeWald,' 
offering  complete  service  facilities, 
as  well  as  a  special  service  on  pro- 
motional displays. 

*  B  &  0  Radio  Co.,  Inc.,  620 
Market  St.,  Newark,  N.  J.,  have  a 
new  advertising  and  sales  promo- 
tion manager  in  the  person  of  Herb 
Brown.  Brown  replaces  Al  Hum- 
mers, resigned.  B&O  are  exclusive 
Northern  New  Jersey  jobbers  for 
Norge  products  and  Sparton  radios. 

+  At  Zenith  Radio  Distributing 
Corp.,  Chicago,  Carrol  '■Tiny"  J. 
Tresslar  has  been  added  to  general 
manager  R.  E.  McGreevy's  crew  of 
field  supervisors.  Tresslar's  former 
experience  has  been  with  Strom- 
berg  Carlson  and  with  GE. 


*  The  Gold  Diggers  Campaign, 
sponsored  by  GE  as  a  dealer  cover- 
age drive,  ended  recently  with  lead- 
ing salesmen  getting  prizes  and 
winning  jobbers  getting  plaques. 
The  four  winning  distributors  are 
GE  Supply  Corp.,  Buffalo,  N.  Y.;  GE 
Supply  Corp.,  Cincinnati,  0.;  Pro- 
tective Electric  Supply  Co.,  Ft. 
"Wayne.  Ind.,  and  GE  Supply  Corp., 
Seattle,  Wash. 


6 Road  well 
si;  i-ou  15 


Sketched  by  Lew  Merrell  for  National 
Union. 


■k  The  Chicago  jobbers  known  as 
Schafer  &  Bowman  are  now  offi- 
cially called  J.  G.  Bowman  &  Co., 
since  Mr.  Schafer  has  sold  his  in- 
terests to  J.  G.  Bowman.  The  firm 
is  currently  accenting  a  technical 
and  engineering  service  to  dealers 
and  servicemen  as  promotion  of 
parts  sales. 

*  Dealers  in  the  trade  area  of 
Reader's  Wholesale  Distributors  are 
just  back  from  a  13-day  cruise  to 
the  British  West  Indies.  They  were 
guests  of  the  Houston,  Tex.,  jobbers 
for  Crosley  products. 

According  to  Hymen  Reader,  head 
of  the  firm,  business  has  been  good 
enough  to  justify  adding  man  power 
to  his  staff.  Ham  Smith,  formerly 
with  Alamo  Distributing  Corp.,  has 
been  appointed   city  representative. 

*  Recently  added  to  the  staff  of 
F.  B.  Connelly  Co.,  the  firm  which 
was  lately  named  Norge  jobbers  for 
Western  Washington  and  Oregon, 
are  three  specialty  salesmen.  Perry 
West  will  supervise  city  sales  in 
Seattle;  John  Stumberg  will  work 
in  the  city  of  Portland;  F.  N.  Ash- 
ford  will  serve  dealers  in  Southern 
Oregon. 


HEADLINE    NEWS    FOR    193S 


FEBRUARY 


ST.  PAUL,  MINNESOTA 


ATR  SMASHES  VIBRATOR  PRICES 

DRASTIC  PRICE  REDUCTIONS  EFFECTIVE  IMMEDIATELY  ON  COMPLETE  ATR  REPLACEMENT  VIBRATOR  LINE 


Examples    of    ATR    price 
reductions: 


ATR 

FORMER 

PRESENT 

Vibrator 

List  Price 

List  Price 

303 

$3.50 

$2.50 

324 

4.00 

2.75 

326 

4.50 

2.1)0 

521 

5.00 

3.75 

536 

5.25 

3.05 

New  prices  subject 

to  norma] 

discounts 

ATR  Replacement  Vibrators  set  new 
high  standards  of  performance  and 
construction.  Greater  life  and  relia- 
bility made  possible  by  new  designs 
utilizing  °I0"  dia,  tungsten  contacts. 


ATR  Vibrators  are  proven  units  of 
the  highest  quality,  engineered  to 
perfection.  They  are  backed  by  more 
than  seven  years  of  vibrator  design 
and  research,  development  and  manu- 
facturing—  ATR  pioneered  in  the 
vibrator  field. 


FREE— Win  an  ATR  Auto  Radio 
"A"  ELIMINATOR  on  special  in- 
troductory ATR  Vibrator  deal.  Full 
details    sent    on    request. 

Insist  on  ATR  VIBRATORS, 
the  Best  by   Test. 


Write  for  your  FREE  copy  of  the  new  1938  ATR  Vibrator  Guide  and 
Name  of  your  Nearest  ATR  Vibrator  Distributor 

Manufacturers     of     DC  -  AC     Inverters,     Inverter     Vibrators, 
"A"  Battery  Eliminators,   and  Battery   Chargers 


AMERICAN   TELEVISION   &    RADIO   CO. 


128  East  Tenth  St. 


St.  Paul,  Minnesota 


50 


Radio  Today 


.DRI^G  old  sets  up  to  date — give 
them  modern,  push  button  control 
by  simply  adding  a  Meissner  Push 
Button  Tuner.  Easily  installed  in 
any  superheterodyne  or  TRF  re- 
ceiver having  a  two  or  three  section 
Tuning  Condenser— just  three  wires! 
Provides  instant  selection  of  any  of 
six  or  eight  of  your  favorite  stations 
— automatically — by  simply  pushing 
the  button — on  your  present  radio 
receiver.  Additional  "Release''  but- 
ton returns  your  set  to  manual  tun- 
ing. Complete  instructions  and  full 
set  of  station  call-letter  discs  sup- 
plied. Stations  selected  may  be  read- 
ily changed  at  any  time  if  desired. 
The  simplicity  and  ease  of  installa- 
tion of  the  Mei-ssner  Push  Button 
Tuner  has  won  the  admiration  of 
service  men  everywhere.  It  can  be 
installed  quickly  at  a  good  profit  and 
will  give  unlimited  service. 
Try  one  on  your  own  set.  See  your 
nearest     good     jobber     or     write     us. 

Meissner  Push  Button  Tuner 


For  C  Stations 
LIST  PRICE 


For  8  Stations 
LIST  PRICE 


$i750  $Q50 

ANOTHER 

MeUdst&l  IDEA 

MEISSNER  MANUFACTURING  CO. 

600  BELLMONT  AVENUE,  MT.  CARMEL,  ILL. 


*  Big  plans  for  the  new  Grunow 
Thermene  gas  refrigerator  were  out- 
lined for  a  convention  of  distribu- 
tors at  Hotel  Sherman,  Chicago, 
Jan.  25-26.  Market  possibilities, 
advertising  campaigns  and  Ther- 
mene engineering  news  were  the 
features  of  the  convention.  On  the 
program  were  Harry  Alter,  General 
Household  Utilities  Co.,  president; 
TV.  C.  Grunow,  chairman  of  the 
board;  J.  D.  Jordan,  research  engi- 
neer; M.  W.  Thompson,  advertising 
manager,  and  /.  /.  Bavin,  sales  pro- 
motion manager. 

*  Philco's  Atlanta,  Ga.,  and 
Charlotte,  N.  C,  offices  have  just 
finished  a  cruise  for  dealers  to 
Miami  and  Havana.  Similar  affairs 
coming  up  in  other  parts  of  the 
country,  at  various  Philco  divisions, 
include:  Memphis,  Tenn.,  division 
to  Mexico  City  in  March;  Pacific 
Coast  Division  also  to  Mexico  City 
in  late  March;  Eastern,  East  Cen- 
tral, Central,  Southwest  and  North- 
west divisions  to  Florida  in  March; 
Atlantic  division  to  Nassau  and 
Havana  early  in  April;  Washington 
and  Oregon  division  to  Alaska  in 
mid-April. 

*  Henry  P.  Segel  of  Segelsound, 
Inc.,  Gardner,  Mass.,  has  been 
named  by  Tech  Laboratories,  Jer- 
sey City,  N.  J.,  as  a  New  England 
representative.  The  Segelsound  firm 
has  stopped  manufacturing  activity 
and  will  accent  the  sale  of  sound 
equipment. 

■*■  Morris  Lebow  has  been  named 
as  key  account  contact  man  in  the 
Chicago  metropolitan  area  for  Zen- 
ith Distributing  Corp.,  according  to 
an  announcement  by  R.  E.  Mc- 
Greevy,  general  manager  of  the  job- 
bing firm.  Lebow  has  had  20  years 
in  the  radio  and  music  business. 

*  A  new  company,  Lund  &  Barr, 
sales  engineers,  with  headquarters 
at  2815  W.  19th  St.,  Chicago,  111., 
has  been  announced  by  Robert  L. 
Barr,  formerly  a  principal  executive 
for  Clough-Brengle.  Another  Clough- 
Brengle  man,  Russell  0.  Lund,  is  as- 
sociated with  Mr.  Barr.  The  com- 
pany will  engage  in  selling,  consult- 
ing engineering,  and  will  represent 
Clough-Brengle  and  Vocagraph  in 
the  Midwestern  states.  They  will 
also  bring  their  wide  experience  to 
bear  on  promoting  other  non-con- 
flicting lines. 


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WARD  offers  you  everything  you 
need  to  cash  in  on  the  big,  profitable 
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at  prices  to  suit  every  prospect.  Each 
model  fits  all  cars  with  no  "top  drill- 
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TOWARD  PRODUCTS  Go*?. 

WARD   BUILDING  CLEVELAND,   OHIO 


February,  1938 


51 


liable  (y&iOicemen  ok  tlmeStica,  Q\ 


President 

T.  P.  ROBINSON 

Vice  President 

A.  C.  W.  SAUNDERS 


VIC. 


Secretary 

INGVAR  PAULSEN 

Treasurer 

LEE  TAYLOR 


Executive  Secretary 
JOE  MARTY,  Jr. 


Qualified    Serviceman,    Anywhere,    U.S.A. : 

Radio  Servicemen  of  America,  Inc.,  grew  out  of  a  desire  of  outstanding  radio 
servicemen  from  all  parts  of  the  country  to  have  an  association  qualified  to  assume 
its  rightful  place  in  the  industry.  The  whole  aim  and  desire  of  RSA  is  to  provide 
an  organization  of  such  character  that  servicemen  will  be  proud  to  belong ;  that 
the  radio  industry  will  consider  an  integral  part  of  its  structure  and  that  the  public 
will  accept  because  of  the  high  business  and  professional  character  of  its  membership. 

The  first  step  taken  was  to  insure,  through  its  by-laws,  that  the  control  of  the 
policies  and  business  affairs  of  the  organization  should  be  forever  vested  in  its 
qualified  members,  any  one  of  whom  is  eligible  for  service  on  the  board  of  directors. 
The  by-laws  further  guarantee  that  the  orgaization  shall  be  independent  and  free 
from  subsidy  or  domination. 

An  equitable  method  of  representation  based  directly  on  radio  set  population  has 
been  worked  out  whereby  the  country  has  been  divided  into  twenty  districts.  Before 
June  of  1938,  the  members  in  each  district  will  elect  a  director  to  represent  them 
on  the  board  of  directors.  The  directors  thus  elected  will  constitute  the  governing 
body  of  RSA  and  will  carry  on  and  expand  the  work  thus  far  done  by  the  first 
organizing  board.  The  term  of  office  of  directors  is  two  years,  at  the  end  of  which 
time  new  directors  will  be  elected  by  the  members  in  each  of  the  districts. 

Qualifications  for  membership  are  determined  by  the  local  chapters  of  RSA. 
Further  provision  has  been  made  that  wherever  a  local  affiliated  chapter  exists,  an 
applicant  must  become  a  member  of  such  local  chapter  and  must  be  certified  to  the 
national  office  by  the  proper  chapter  officers  before  he  can  be  accepted  as  a  member 
of  the  national  body;  likewise,  when  a  member  at  large  moves  into  an  existing 
chapter  area,  he  must  become  a  member  of  the  local  chapter.  RSA  feels  that  local 
problems  can  best  be  solved  by  a  united  local  group  acting  in  the  best  interests  of 
the  majority. 

RSA  is  definitely  not  interested  in  a  quantity  membership  as  such.  It  will 
continue  to  build  its  membership  from  the  ranks  of  radio  servicemen  who  are 
willing  to  assume  the  responsibility  of  leadership  in  their  profession,  true  to  the 
ethics  of  good   business  and  to  the  welfare  of  the  public   they  serve. 

RSA  is  the  only  national  service  organization  that  has  ever  enjoyed  the  support 
and   cooperation   of   ALL  the  organized    groups   within   the    industry. 

Upon  acceptance  of  application,  a  member  will  immediately  receive  a  certificate 
of  membership  suitable  for  framing  and  a  pocket  membership  card.  Regular  mailings 
will  be  made  of  advance  circuit  diagrams,  received  through  the  cooperation  of  set 
manufacturers.  A  monthly  house  organ  containing  interesting  news  and  editorials 
will  be  mailed  to  members.  We  stand  ready  at  all  times  to  help  local  chapters 
and  individuals  solve  problems  that  affect  their  welfare.  We  are  embarking  upon  a 
program  designed  to  educate  the  public  to  the  need  of  reliable  radio  servicing  and 
will  use  such  media  as  newspapers,  periodicals  and  local  broadcasts  in  towns  where 
local  chapters  already  exist. 

Through  the  pledged  cooperation  of  publishers,  manufacturers  and  trade  journals, 
we  offer  our  members  accurate,  expert  information  and  technical  advice  at  no  cost. 
Through  these  same  contacts,  a  National  Speakers  Bureau  is  being  established  to 
provide  outstanding  speakers  for  all  chapters  desiring  experienced  lecturers.  Education 
in  actual  service  problems  as  well  as  technical  theory  is  planned  for  the  immediate 
future. 

All  of  the  above  services  are  rendered  to  our  members  at  only  $2.00  per  year 
for  national  dues  for  1938.  Fill  out  the  application  and  send  to  the  national  office 
at  once.  Where  a  local  affiliated  chapter  exists,  this  application  will  be  sent  to 
the  proper  local  Secretary  for  certification  and  upon  your  admission  to  the  local 
chapter  and  upon  payment  of  local  and  national  dues  for  1938,  you  will  receive 
immediately  your  membership   card   and  other  material  mentioned  above. 


RADIO    SERVICEMEN    oj   AMERICA,    Inc. 

Incorporated  not  for  profit  304  South  Dearborn  St.,  Chicago 

.  APPLICATION  Jor  MEMBERSHIP  . 

I   hearby   make  application   for  membership   in   the   RSA. 

Affiliated  with  Local  Chapter  in   

Personal    Name    

Home   Address    

City   &    State 

Firm    Name     

Address . 

Telephone      (home) (firm) 

Years   Experience Age 

Membership   in    other   Associations    

Whole  or  Tart  Time  Radio  Serviceman   

If  Part  Time,  what  portion  is  devoted  to  Radio  Servicing  (^,  y2,  %,  etc.) 

What  are  your  other  duties    

Education    other    than    Radio    

Radio   Training   or    Courses    

Testing     Equipment     

It  is  my  sincere  desire  to  become  a  member  and  adhere  to  your  principles  of  fair 
competition  and  ethics  and  if  accepted  do  solemly  swear  (or  affirm)  that  I  will  faith- 
fully fulfill  my  obligation  as  a  member  of  the  Radio  Servicemen  of  America,  Inc. 

Signed     

Applicant 

Approved  :  Chapter  Secy Executive  Secy 

Please    address    your    replies    to    Radio    Servicemen    of    America,     Inc.,    304    South 
Dearborn  Street.   Chicago,   Illinois,  Attention  of  Joe  Marty,  Jr.,  Executive  Secretary. 


TRADE  FLASHES 


*  The  Operadio  Mfg.  Co.  an- 
nounce the  promotion  of  Howard  A. 
Wilson  to  the  position  of  sales  man- 
ager of  the  public  address,  sound 
and  amplifier  trade  division,  ac- 
cording to  a  statement  issued  by 
Larry  King,  general  sales  manager. 
This  new  position  has  been  created 
because  of  the  rapid  growth  of  this 
portion  of  the  business,  which  in- 
cludes all  of  the  equipment  which 
is  sold  through  jobbers  and  dealers. 
Howard  Wilson  has  been  with 
Operadio  for  several  years,  acting 
as  division  manager,  calling  on  the 
jobbers  and  dealers  in  the  Eastern 
and  Southern  territories.  His  new 
position  now  puts  him  in  active 
charge  of  all  sales  to  the  jobbers 
and  dealers  for  the  entire  United 
States   and   Canada. 

*  Westchester  Institute  of  Radio 
Service  Men,  at  a  recent  meeting 
in  Mt.  Vernon,  N.  Y.,  presented  as 
special  lecturer  Mr.  V.  K.  Vlrich, 
service  editor  of  Radio  Today.  Mr. 
Ulrich  spoke  on  "Theoretical  and 
Practical  Discussions  of  New  Re- 
ceiver Circuits."  Secretary  of  the 
organization  is  R.  A.  Marriot,  55 
Rosedale  Ave.,  New  Rochelle,  N.  Y. 

+  Hygrade  Sylvania  Corp.'s  ex- 
port manager,  Walter  A.  Coogan,  is 
now  on  a  3-month  tour  of  Europe. 
He  will  visit  25  countries  on  the 
trip.  Mr.  Coogan  recently  added  up 
Hygrade's  export  sales  during  1937, 
found  the  greatest  total  in  the 
firm's  history. 

*  Cinaudagraph  Corp.,  Stam- 
ford, Conn.,  now  have  new  and 
larger  offices  in  Chicago  in  the 
Northwest  Tower  Building  at  2018 
W.  North  Ave.  Midwestern  repre- 
sentative for  Cinaudagraph  is  Roy 
W.  Augustine. 

*  Now  established  at  Wholesale 
Radio  Service  Co.,  100  Sixth  Ave., 
New  York  City,  is  a  new  and  com- 
plete camera  and  photographic  sup- 
ply department.  The  equipment  in- 
cludes both  still  and  motion  picture 
supplies.  M.  Donald  Langer,  fa- 
mous photographer,  exhibitor  and 
instructor,  is  in  charge  of  the  new 
department. 

■*  Comunaphone  Systems,  nlc, 
manufacturers  of  intercommunica- 
tors.  have  a  new  factory  address  at 
1175  Broad  St.,  Newark,  N.  J.  Henry 
Tarn  our r  is  in  charge  of  interphone 
sales. 

*  Joseph  D.  R.  Freed  and  Arthur 
Freed,  who  have  been  identified 
with  the  Freed  Mfg.  Co.,  Inc.,  New 
York  City,  for  the  past  few  years, 
have  sold  their  interest  in  the  com- 
pany. They  have  both  been  asso- 
ciated with  Freed-Eisemann  radio 
since  the  early  days  of  broadcast- 
ing. This  well-known  trade  mark 
remains  vested  solely  in  them,  and 
their  plans  for  the  future  will  be 
announced  very  soon. 


52 


Radio  Today 


Art  Maybrun,  export  manager, 
Trav-ler  Radio  &  Television 
Corp.,  finds  foreign  buyers 
have  special  interest  in  Ameri- 
can automatic  tuning. 


•k  The  Sales  Manager's  Cup, 
awarded  twice  a  year  by  the  Philco 
Radio  and  Television  Corp.  to  divi- 
sion managers  leading  the  country, 
was  presented  in  Chicago  recently 
to  Jack  Leahy  of  the  central  divi- 
sion. 

+  Universal  Microphone  Co., 
Inglewood,  Calif.,  will  exhibit  one 
of  its  master  wax  recording  ma- 
chines, together  with  discs  and  ac- 
cessories, at  the  Brussels  Interna- 
tional Fair  late  this  month. 


*  Castellanos-Molina  Corp.,  New 
York  City  dealers,  who  for  the  last 
32  years  have  specialized  in  radio 
and  music  for  the  Spanish  trade, 
are  currently  expanding  and  remod- 
eling their  sales  rooms.  Combina- 
tions and  records  will  be  given  an 
accent;  the  receiver  lines  being  fea- 
tured are  Garod  and  Pilot.  Herman 
Diaz,  formerly  with  Barclay-Warner, 
Inc.,  is  now  one  of  the  proprietors 
of  the  big  store,  along  with  Antonio 
Contreras  and  Alfonso  Diaz. 

•*•  Lawrence  M.  Braun,  export 
manager  for  Lafayette  Radio  Mfg. 
Go.  and  Wholesale  Radio  Service 
Co.,  Inc.,  sailed  early  this  month 
for  Central  America  to  visit  Lafay- 
ette jobbers  in  Haiti,  Kingston,  Ja- 
maica, Colombia  and  Cristobal.  In 
Panama  Mr.  Braun  will  supervise 
the  installation  of  a  PA  system  to 
be  used  in  connection  with  the 
Olympic  games  there. 

+  C.I.T.  Corp.,  the  national 
sales  finance  company,  has  opened 
an  ofiice  at  230%  Pine  St.,  Albany, 
Ga.,  dedicated  to  more  service  to 
the  Southeastern  Georgia  area.  Har- 
old L.  Dorsey  is  in  charge.  C.I.T. 
offices  in  U.S.  and  Canada  now  num- 
ber over  190. 

*  Off  for  Europe  late  last  month 
was  Charles  I.  Robbims,  foreign 
sales  representative  for  Arcturus  ' 
Radio  Tube  Co.,  Newark,  N.  J.  He 
will  visit  every  country  in  Europe, 
the  Near  East,  and  Asia,  helping 
distributors  and  manufacturers  with 
their  current  problems. 


3  IMPORTANT 
USES 


(  l )  The  Acoustic  Com- 
pensator enables  you  to 
lower  or  raise  the  response 
of  the  microphone  by  the 
mere  Hip  of  the  finger! 
(2)  Makes  the  Velocity 
immediately  adjustable  to 
close  talking  or  distant 
pickup.  (3)  Immediately 
adjustable  to  any  type  of 
job  or  occasion. 
MODELS  RBHk.  RBMk.  with  acoustic  compensa- 
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— 65  db.  Switch,  cable  connector,  25'  of  cable. 

S42.00  LIST 
MODELS  RBHn,  RBMn,  without  acoustic  compen- 
sator   $42.00  LIST 

MODELS  RAH-RAL.  excellent  for  speech  and 
music.  Reduces  feedback.  Output,  —-68  db. 

$22.00  LIST 

li*      '  AMPERITE  CONTACT  MICROPHONE. 

for  use  on  all  string  instruments.  . .  .$22.00  LISTt 
AMPERITE  "HAND-I-MIKE."  smallest  velocity 
made;  used  as  hand,  desk,  or  stand  mike. 

$22.00  LIST 

Write  /or  new  Illustrated  Bulletins. 

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MICROPHONE 


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Your  Motors 

Stand  Up  If  Made  By 

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THET  not  only  stand  UP,  giving  long- 
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in  popularity  ...  do  a  real  job  in  boost- 
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phonographs  and  records.  Because  of 
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drag.  .  .  .  Give  your  customers  General 
Industries  Flyer  Motors.  Self-starting, 
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store  demonstration,  private  homes  or 
in  long-haul  steady  use  in  amusement 
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speed    types    if    desired. 

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5  SENSATIONAL 
NEW  RCA  AUTO 

ANTENNAS 

...all  at  popular  prices! 


Every  one  is  a  sales  wow!  They 
feature  modern  styling,  bril- 
liant performance  and  simple 
installation!  Illustrated  is  RCA 
MONOGRAM  ANTENNA— 
a  beauty  for  any  car  top.  Special 
rubber  mounting  makes  in- 
stallation easy  and  fast.  An- 
tenna extends  from  21"  to 
35  M"  in  length,  is  guaranteed 
rust-proof.  (Stock  No.  9823. 
List  price  $4.95). 

RCA's  complete  line  of  1938 
antennas  includes  the  RCA 
COWLTENNA.  This  is  the 
vertical  type  for  permanent 
installation  in  side  of  cowl. 

Listen  to  the  Magic  Key  of  RCA 
on  the  NBC 


(Stock  No.  9825.  List  price 
$3.65) . . .  RCA  RODTENNA, 
can  be  installed  in  five  minutes 
without  drilling,  soldering  or 
cementing.  (Stock  No.  9793. 
List  price  $3.50)... RCA  TEL- 
ESCOPIC RODTENNA,  at- 
taches to  auto  door  hinge 
(Stock  No.  9827.  List  price 
$2.75)... RCA  DI-POLE  AN- 
TENNA, world's  finest  for 
undercar  installations.  (Stock 
No.  9605.  List  price  $2.60). 

Three  low-capacity  cables 
are  available  for  connecting 
these  antennas  to  all  auto  ra- 
dios, at  prices  of  $.70  and  $.90 

every  Sunday,  2  to  3  P.M.,  E.S.T. 
Blue  Network 


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Over  three  hundred  million  RCA  radio  tubes  have  been  purchased  by  radio 
users  ...  In  tubes,  as  in  antennas,  it  pays  to  go  RCA  ALL  THE  WAY. 


February,  1938 


53 


Complete 
Electric  Plants 


COMPLETE    POWER    UNITS 

Operating  A.C.  Radio,  PUBLIC  AD- 
DRESS SYSTEMS,  SOUND  CARS, 
MOTION  PICTURE  EQUIPMENT, 
and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Sys- 
tems, Refrigerators,  all  Household  Ap- 
pliances for  FARMS,  CAMPS,  LAKE 
HOMES,  or  STANDBY  SERVICE.  For 
use  anywhere  Power  Line  Current  is 
not  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C,  6,  12,  32  and  110  Volt, 
D.C.  as  well  as  Combination  A.C.-D.C. 
Units.  Anyone  can  Operate.  COM- 
PLETE, READY  TO  RUN. 

JT  WRITE  FOR  DETAILS  ON  DEALERS'  71 
[[PROPOSITION   AND  TERRITORY  JJ 

D.  W.  ONAN  &  SONS 

588  Royalston  Ave.,   Minneapolis,   Minn. 


STi* 


DO  YOU  KNOW 
why  RADIART   AERIALS 

keep  their  complexions? 

It's  no  mystery:  Radiart,  like 
Cadillac  and  Packard,  is  will- 
ing to  pay  for  high-grade 
Nickel  and  Chrome  Plating  on 
Non-Rust  Materials,  in  order  to 
pass  car  manufacturers'  salt- 
spray  test. 


I  by  the  makers  of 

/  RADIART  VIBRATORS 

THE  RADIART  CORP.  •  CLEVELAND, 


TRADE  FLASHES 


THE  REPRESENTATIVES  SPECIAL 

*  A  special  train  to  the  Parts 
Show  in  Chicago,  June  8-11,  will 
be  sponsored  by  "The  Representa- 
tives," the  national  organization  of 
radio  parts  manufacturers'  agents. 
All  those  identified  with  the  radio 
industry  are  invited. 

Leaving  New  York  on  the  N.  Y. 
Central  line,  the  train  will  stop  en 
route  in  Upper  New  York  and  in 
New  England.  Complete  plans  are 
being  made  for  100  per  cent  com- 
fort and  enjoyment.  Committee  in 
charge  includes  Perry  Saftler, 
chairman;  Jack  Price,  Chas.  Coop- 
er, and  Dan  R.  Bittan,  27  Park 
Place,    New   York   City. 


*  Tube  business  done  by  the 
Arcturus  Radio  Tube  Co.,  Newark, 
N.  J.,  during  January,  1938,  is  re- 
ported by  the  company  to  exceed 
any  January  since  1929.  Employees 
have  been  added,  February  pros- 
pects are  strong  and  sales  mana- 
ger Jaclc  Geartner  reports  wide- 
spread favor  for  the  firm's  equip- 
ment deal.  Next  April,  Arcturus 
will  celebrate  its  10th  birthday  of 
the  introduction  of  the  quick  heat- 
ing tube. 

■*•  Samuel  Glide,  who  has  been 
identified  with  the  Freed  Mfg.  Co.. 
Inc.,  New  York  City,  for  a  number 
of  years,  has  been  elected  president 
of  the  company,  and  Max  Epstein, 
who  has  also  been  an  executive  of 
the  company  since  its  inception,  is 
now  treasurer.  The  company's  plans 
for  the  introduction  of  its  1938  sets 
will  be  announced  shortly.  Joseph 
D.  R.  Freed  and  Arthur  Freed  are 
no  longer  associated  with  the  or- 
ganization. 

+  Harry  Braverman.  formerly 
general  manager  of  the  Climax 
Radio  Mfg.  Co.,  Chicago,  and  well 
known  throughout  the  radio  indus- 
try, has  formed  the  Haroray  Co. 
with  factory  and  offices  in  Chicago. 
The  company  is  manufacturing  an 
automatic  push-button  tuning  unit 
and  is  merchandising  its  products 
through  jobbers  and  dealers  and 
servicemen.  Mr.  Braverman  is  also 
acting  as  a  consultant  to  manufac- 
turers of  radio  sets,  on  production, 
advertising  and  merchandising 
problems. 

*■  Engineers  of  the  Ward  Leon- 
ard Electric  Co.,  Mt.  Vernon,  N.  Y., 
point  with  pride  to  the  fact  that 
they  have  developed  those  100  watt 
Plaque  resistors  which  are  being 
used  by  "Gerry"  Sayre  (OX2QY) 
in  his  exceptional  broadcasts  from 
Reindeer  Point,  Greenland.  Sayre 
is  with  the  MacGregor  Artie  Expe- 
dition, uses  a  rhombic  antenna  in 
which  the  WL  non-inductive  resis- 
tors play  a  large  part. 

+  S.  H.  Fertig  is  now  the  radio 
and  appliance  manager  at  Shafer's. 
12  E.  Palisade  Ave.,  Englewood, 
N.  J. 


Triad's  vice-president  in  charge  of 
sales  H.  H.  Steinle,  right,  is  interested 
in  RADIO  TODAY  as  thumbed  by 
its  service  editor,  Vinton  K.  Ulrich. 
Mr.  Ulrich  frequently  takes  time  out 
to  address  servicemen  groups,  ap- 
peared in  Westchester,  N.  Y.,  recently. 


ZENITH  TO  SPEND  $500,000 

*•  Zenith  Radio  Corp.  will  stage 
a  $500,000  advertising  campaign  to 
promote  its  new  product,  according 
to  recent  announcements  from  Chi- 
cago headquarters.  The  new  device 
has  been  mentioned  to  network  au- 
diences on  CBS  Sunday  nights  on 
the  Zenith  Foundation  program,  as 
"employing  some  of  the  principles 
of  radio,  but  not  for  entertainment." 
Nation-wide  discussion  as  to  what 
the  product  might  be  has  resulted, 
but  Commander  E.  F.  McDonald, 
Zenith  president,  will  not  name  the 
product  until  it  is  ready  for  his 
20,000  dealers. 


■*•  Announcement  by  Atlas  Sound 
Corp.,  Brooklyn,  N.  Y.,  is  that  they 
are  extending  their  factory  and 
floor  space  to  accommodate  In- 
creased production  facilities.  The 
sound  equipment  manufacturers 
now  occupy  another  floor  of  the 
building  at  1451  39th  St. 


*  Philco  Radio  £  Television 
Corp.  has  moved  its  auto  radio  en- 
gineering laboratories  from  Phila- 
delphia to  Detroit.  Purpose  is  to 
place  the  Philco  engineering  staff 
near  the  Detroit  vehicle  plants. 


+  George  H.  Kiley,  one  of  the 
pioneers  in  the  radio  industry,  and 
connected  with  several  foremost 
manufacturing  organizations,  died 
of  a  heart  attack  in  Philadelphia 
Jan.  20  at  the  age  of  48.  Mr.  Kiley's 
most  recent  connection  was  as  a 
sales  executive  for  the  Electro 
Acoustic  Products  Co.,  Ft.  Wayne, 
Ind. 


+  The  Mueller  Electric  Co., 
Cleveland,  Ohio,  manufacturers  of 
clips,  has  appointed  Ben  Joseph, 
477  5th  Ave.,  New  York  City,  as  its 
representative,  covering  Greater 
New  York,  New  England,  Eastern 
Pennsylvania  and  Northern  New 
Jersey. 


54 


Radio  Today 


•     INDEX     • 
TO  ADVERTISEMENTS 


Page 

ABC     RADIO     LABORATORIES 48 

ALADDIN    RADIO    INDUSTRIES.    INC 49 

AMERICAN    TELEV.    &    RADIO    CO 50 

AMPERITE    CO 53 

ANDREA     RADIO     CORP 31 

CENTRALAB     38 

CLAROSTAT    MFG.    CO.,     INC 48 

COMMERCIAL    CREDIT    CORP 4 

COMUN-A-PHONE    SYSTEMS,     INC 56 

CROSLEY    RADIO    CORP 7 

CROWE    NAME    PLATE   &    MFG.    CO 46 

GALVIN    MFG.   CORP Cover  IV 

GENERAL    ELECTRIC    CO Cover  II 

GENERAL     INDUSTRIES     CO 53 

GOODMAN'S    DISPLAY    SPECIALTIES 56 

HARBRAY    CO 47 

HYGRADE    SYLVANIA    CORP 2 

INSULINE    CORP.    OF    AMERICA 47 

INTERNATIONAL    RADIO    CORP 43 

INTERNATIONAL    RESISTANCE    CO 41 

IRWIN    CORP 43 

JANETTE     MFG.     CO 51 

J.   F.   D.    MFG.   CO 49 

JOHNSON     MOTORS     23 

KEN-RAD  TUBE   &  LAMP  CORP 45 

MALLORY   &   CO.,    INC.,    P.    R 1 

MEISSNER    MFG.    CO 51 

NOBLITT-SPARKS    INDUSTRIES.    INC.    Cover  III 

NORGE    DIV.,    BORG-WARNER    CORP 37 

ONAN    &   SONS.    D.    W 54 

PHILCO   RADIO  &  TELEV.   CORP..  SET   DIV.     8 
PHILCO   RADIO  &  TELEV.  CORP..  TUBE  DIV.     5 

PIONEER     GEN-E-MOTOR     CORP 39 

PRESTO    RECORDING     CORP 4S 

OUAM-NICHOLS    CO 56 

RADIART    CORP.,     THE 54 

RADIO     PARTS    SHOW 47 

RADIO    REEL    CO 45 

RADIO   SERVICE    MEN    OF   AMERICA,    INC.     52 

RADOLEK      56 

RAYTHEON     PRODUCTION     CORP 27 

RCA    MFG.    CO.,    INC.    PARTS    DIV 53 

RCA   MFG.  CO.,    INC.,     RADIOTRON     DIV...      6 
RCA    MFG.    CO.,    INC.,    RCA-VICTOR    DIV...      3 

RIDER,     JOHN     F 39 

SOLAR    MFG.   CORP 55 

STAR    MACHINE    MFRS.,    INC 50 

STROMBERG-CARLSON    TELE.    MFG.    CO. 

Pt.    II.   p.   4 

TR1PLETT    ELEC.    INSTRUMENT    CO 42 

TUNG-SOL    LAMP    WORKS,    INC 39 

UNIVERSAL    CAMERA    CORP 44 

UTAH    RADIO    PRODUCTS    CO 31 

WARD    LEONARD    ELECTRIC   CO 47 

WARD    PRODUCTS    CORP 51 

WESTON     ELEC.     INSTRUMENT    CORP 29 


While  every  precaution  is  taken  to  insure  accu- 
racy, we  cannot  guarantee  against  the  possibility 
of  an  occasional  change  or  omission  in  the  prepa- 
ration  of  this   index. 


February,  1938 


55 


JIM 
QUAM 

& 


p\e 


its?' 


OtW" 


tots-    But  V      ^e  t°"  t'b_ 


QUAM-NICHOLS  CO. 


33rd  Place  &  Cottage  Grove 
CHICAGO 


1674  Broadway 
HEW  YOR* 


•  Everything  you  need  in  radio.  It's  all 
in  this  new  RADOLEK  RADIO  PROFIT 
GUIDE.  Every  repair  part  for  every  re- 
ceiver. Newest  radio  receivers.  New  1938 
model  public  address  amplifiers,  outputs 
for  5  to  100  watts.  New  model  public  ad- 
dress speakers.  Test  instruments.  Technical 
books.  Special  equipment.  Leading  stand- 
ard brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 
And  everything  under  one  roof.  You  get 
what  you  want  promptly,  and  exactly  what 
you  want.  Radolek's  immense  stock  plus 
Radolek's  efficient  organization  insures  you 
fastest  service.  25,000  service  men  depend 
on  this  service  and  benefit  by  Radolek's 
Radio  Profit  Guide.  It  will  help  you  make 
more    money. 

RADOLEK 

601  W.  Randolph,  Chicago,  Dept.  D-16 

Send  me  the  1938  Radolck  Radio  Profit  Guide  FREE 


Address    

Serviceman?  n 


Dealer?  □         Experimenter?  □ 


TRADE  FLASHES 


RADIOS  60  TO  26  SCHOOLS 

*  Twenty-six  radio  receiving  sets 
of  many  sizes  and  makes  were  pre- 
sented recently  to  the  Montgomery, 
Ala.,  public  schools  by  various  deal- 
ers through  the  community  service 
committee  of  the  Rotary  Club.  The 
instruments  will  be  installed  in  the 
2  6  larger  schools  of  the  system,  to 
be  used  as  a  new  teaching  medium 
and  not  for  entertainment  purposes, 
it  was  announced  by  Dr.  Clarence  M. 
Dannelly,    superintendent. 

In  commenting  on  the  gift,  the 
superintendent  said:  "The  radio  and 
motion  pictures  are  two  present-day 
teaching  media  which  the  public 
schools  use  in  addition  to  other  me- 
dia, such  as  the  daily  papers,  current 
periodicals,  books  including  classics 
and  other  content  material.  The 
Montgomery  public  schools  certainly 
appreciate  this  outstanding  contribu- 
tion of  the  Rotary  Club." 

Donors  of  the  radios  were:  Inter- 
state Oil  Co.,  Elks  Club,  Superior 
Cleaners  and  Dyers,  Walther  Bros., 
Radio  Electric  Co.,  Coca-Cola  Bot- 
tling Co.,  Frank  Tennille  Furniture 
Co.,  Teague  Hardware  Co.,  Bishop- 
Parker  Furniture  Co.,  Haverty  Fur- 
niture Co.,  Sears,  Roebuck  &  Co., 
French's,  Inc.,  Alabama  Gas  Co., 
Harry  Marks  of  Fenner  &  Beane, 
Colquitt  H.  Lane,  also  of  Fenner  & 
Beane,  Nehi  Bottling  Co.,  Mercantile 
Paper  Co.,  Young's  Ice  Cream  Co., 
McGough  Bakeries,  Cosby -Hodges 
Milling  Co.,  John  Danziger,  Inc., 
WSFA,  W.  W.  Bowman  &  Son,  and 
the  Vesuvius   Lumber  Co. 

•  Bubenstein  &  Fixel.  80  8th 
Ave.,  New  York  City,  well  known 
manufacturers'  representatives,  have 
just  added  the  Harbray  tuning  unit 
to  the  lines  they  represent. 

+  George  Russell,  sales  manager 
of  the  Sentinel  Radio  Corp.,  Chi- 
cago, has  been  spending  the  greater 
part  of  the  past  five  weeks  out  on 
the  firing  line  visiting  Sentinel 
jobbers  and  leading  retailers  through- 
out the  Southwest  and  Middle  West. 
During  his  travels  he  attended  the 
Midwest  Hardware  Show  at  Kansas 
City,  Mo.,  which  proved  to  be  a 
mighty  successful  event  with  plenty 
of  buying  throughout  the  course  of 
the  show.  Mr.  Russell  also  attended 
the  annual  convention  of  the  Mar- 
shall-Wells Co.,  Duluth,  Minn.,  Sen- 
tinel jobber  who  held  a  four-day 
meeting  from  January  31st  to  Feb- 
ruary 3rd. 

+  Emerson  dealers  and  their 
salesmen  in  the  New  York  and  New 
Jersey  areas  were  guests  at  a  sec- 
ond annual  meeting  early  this 
month  at  the  Hotel  New  Yorker, 
New  York  City.  Territories  served 
by  the  jobbers  Emerson-New  York 
and  Emerson-New  Jersey  were  well 
represented  and  an  important  ad- 
vertising campaign  was  outlined  by 
Emerson  officials.  Complete  plans 
were  announced  for  the  promotion 
of  the  48  sets  now  in  the  company's 
line,  with  special  accent  on  model 
AM-169. 


LIGHT! 
ACTION! 
SOUND! 

FOR  YOUR  WINDOW,  SHOWROOM  OR 
CONVENTIONS 

A  sensational  new  display  unit  with  great  drawing-power. 

•  Comes  ready  for  use;  place  in  position  and  plug  into 
any   AC   outlet. 

•  Sets  can  be   played  while  the  unit  is  in  motion. 

•  Three  models — No.  1A — 100  lbs.  carrying  capacity, 
net  price  $18.00;  No.  2A— 125  lbs.,  $20.00;  No. 
3A— 150    lbs.,   $23.00. 

•  Easily  holds  4  or  5  midgets  at  one  time,  or  com* 
bination  of  console  and   midget  or  end  table. 

•  Rotating  surface  can  be  increased  by  adding  larger 
disk.  Base  can  be  skirted  with  concealed  lights  to 
illuminate    the    display. 

•  Special  introductory  offer — Genuine  Lamiluxe  mes- 
sage band,  on  which  advertising  message  can  be 
placed  and   illuminated. 

•  Guarantee!  for  one  year. 

GOODMAN'S 

"ROTARY    RADIO     DISPLAY    SPECIALTIES" 

19  WEST  34TH  ST.  NEW  YORK 

Tel.:   Wisconsin    7-8951 


MAGIC  PHONE 


The    Inter  communicator 
that  PERFORMS  and  SELLS! 


PROVIDES  dependable  two-way  com- 
munication between  master  and  re- 
mote stations,  with  variable  volume 
and  excellent  tone.  No  tricky  controls. 
No  unproved  features.  Sold  to  the  trade 
at  a  sensible  net  price,  permitting  ade- 
quate markup. 
Handrubbed,  walnut  -  fin- 
ished cabinets,  8J/2  x  5|/2"* 
PM  speakers,  6'/2".  Master 
and  remote  station  with 
50  ft.  of  wire,  complete;  one 
or   more. 

The     smash 
Systems     to 


$1J25 

NET  per 
PAIR 


hit     of     communication — 
meet     any     requirement. 

ACT    NOW! 

Send    for    illustrated    folder. 

Manufactured    by 

Comun-a  phone   Systems,   Inc. 
1175    Broad    Street.    Newark.    N.   J. 


56 


Radio  Today 


IN  TWO  PARTS 
•  PART  TWO  • 


RADIO 
TODAY 


FEBRUARY 
•    1938     • 


Every  Home  Has 
for  Small  "Extra" 


Places 
Radios 


But  first  see  that  each  family  is  provided  with  a  quality 
console — a  "big  set"  capable  of  full-tone  reproduction 


A  good  many  people  are  coming 
into  radio  stores  these  days  to  ask 
about  the  new  small  radio  sets.  New 
low  price  levels  in  such  receivers 
have  awakened  public  interest  in 
the  idea  of  having  "extra  radio 
sets"  in  the  home. 

In  fact,  modern  convenience  in 
listening  requires  that  there  be  as 
many  radios  as  there  are  diverse 
listening  tastes  in  the  home — even 
to  the  point  of  as  many  sets  as  there 
are    individuals    in   the    household! 

And  so  this  idea  of  an  extra  set 
for  the  bedroom,  an  extra  set  for 
the  kitchen,  one  for  the  nursery, 
and  one  for  the  maid's  room  is 
thoroughly  sound — for  both  the 
customer  and  the  radio  dealer — 
providing  the  customer  has  already 
equipped  his  home  with  at  least 
one  quality  radio  set  or  console. 
That  is,  has  a  set  in  his  living  room 
capable  of  providing  the  full  tonal 


range  of  the  music  and  programs 
his  family  should  hear. 

So  when  the  customer  comes  into 
the  store  and  inquires  about  a  small 
radio,  this  means  an  opportunity 
for  the  salesman  to  ask  questions 
leading  to  the  sale  of  a  quality 
radio. 

'  What  kind  of  a  set,  if  any,  have 
you   now,  Mrs.  Smith?" 

"How  old  is  it?" 

"What  are  your  family's  tastes  in 
listening?" 

"Is  the  present  set  suitable  for 
listening  to  great  programs,  Tosca- 
nini,  the   Philharmonic?" 

'  Let  me  show  you  the  set  you 
ought  to  have." 

Come  to  buy 

Few  people  may  be  coming  into 
stores  now,  but  those  that  do  come, 
are  not  casual  shoppers — they  come 
with  a  real  purpose  of  buying. 


So,  though  many  store  callers  will 
want  small  radios,  the  dealer  must 
look  on  these  visitors  as  valuable 
store  traffic  leading  to  quality-set 
sales.  Here  is  a  chance  to  contact 
potential  customers,  and  if.  they 
have  no  modern  quality  radio,  here 
is  the  chance  to  divert  the  purchase 
of  an  inexpensive  set  into  a  first 
payment  on  a  quality  console. 

Tone  values 

As  outlined  on  the  next  page, 
show  the  customer  what  tone  qual- 
ity in  a  radio  means,  for  good  tone 
is  every  purchaser's  first  require- 
ment. Show  the  importance  of  good 
design,  ample  tube  equipment, 
speaker  power,  selectivity  and  sen- 
sitivity. 

There  are  many  places  for  small 
radios  in  any  comfortable  home. 
Customers  should  be  encouraged 
to  equip  their  homes  for  convenient 
listening,  upstairs  and  down,  but — 


BEDROOM 


CHILDREN'S  ROOM 


MAID'S  ROOM 


TO  REALLY   ENJOY  RADlt 

MUST  HAVE  A  Q 


1 


Only   a   full-sized  console    will 
reproduce  the  tonal    quality 
of  the   whole    musical   scale 


1111 -MIIM- 'M' 


2 


Only   with   a   powerful  speaker 
can  one  get  good    Volume 
without  distortion 


3 


Only   c 
suff  ici 


4 


Only  a  god 
Select  ivityen 
clear  progms 
out  of  the  mazeil 


FOR  MUSICAL  SATISFACTION,  ONL/ 


0  TODAY-  EVERY  HOME 
JALITY  CONSOLE 


5     Only  with  a  quality  console  can 
one  reproduce  the  superb   musical 
performance   of  great  artists,   orch 
estras,   symphonies,   and   opera   stars 


d  console  has  sufficient 
nd    Sensitivity  to  pick 
ns,  free  of  disturbance, 
:f  the   radio   channels 


RADIO  TODAY 
February,   1938. 


A  FULL-SIZE   CONSOLE  WILL  DO! 


TO  REALLY   ENJOY  RADIO  TODAY-  EVERY  HOME 

MUST  HAVE   A  QUALITY  CONSOLE 


1 


Only  a  full-sized  console   wi! 
produce  the  tonal    quality 


re 


of  the  whole    musical  scale 


2 


llll illlHllllllllllWIIIIIIHIIIMIIHIIHir 


Only  with  a  powerful  speaker 
can  one  get  good    Volume 
without  distortion 


4  Only  a  good  console  has  sufficient 
Selectivity  and   Sensitivity  to  pick 
clear  progums,  free  of  disturbance, 
out  of  the  mazeof  the  radio  channels 


5     Only  with  a  quality  console  can 
one  reproduce  the  superb  musical 
performance  of  great  artists,   orch- 
estras, symphonies,   and   opera   stars 


RADIO  TODAY 
February,  1938. 


FOR  MUSICAL  SATISFACTION,  ONI  A  FULL-SIZE   CONSOLE  WILL  DO! 


C/oucA  a  uuttbn 
anctetucru 

LABYRINTH  TONE    - 


FULL-SIZE  PERFORMANCE 

DEMANDS  A  FULL-SIZE  CONSOLE  — 

with  the  LABYRINTH ! 


2-15- M  Laby- 
rinth, Electric  Flash 
Tuning. 


THE  ACOUSTICAL  LABYRINTH 


The  long,  winding  pass- 
ageway of  the  Labyrinth, 
takes  the  place  of  the 
usual  box-like  cavity  in 
the  cabinet  which  is  the 
eof  the  exaggerated 
m  in  low  tones.  It 
I  deeper  bass  notes, 
new  fidelity. 


Of  all  the  discoveries  in  radio  which  go  to 
make  tone  lifelike,  natural — the  Labyrinth 
undoubtedly  leads.  It  remains  the  outstand- 
ing important  feature  of  high  quality  radios. 

So  revolutionary  is  this  exclusive  and  pat- 
ented development  that  it  makes  obsolete  any 
console  large  enough  to  contain  a  Labyrinth 
and  not  having  one.  Let  a  prospective  buyer 
of  a  fine  radio  once  hear  Labyrinth  Tone 
and  no  other  will  satisfy. 

Add  to  this  the  convenience  of  Stromberg- 
Carlson's  Electric  Flash  Tuning,  the  beauty 
of  Stromberg-Carlson  cabinets,  and  you  will 
realize  why  Stromberg-Carlson  sales  are  up. 

STROMBERG-CARLSON  TELEPHONE  MFG.   CO.,  ROCHESTER,  N.  Y. 


ELECTRIC  Wash  TUNING  .  .  . 

Touch  a  bullon  and  the  station  you  want  conies  in,  perfectly 
tuned,  without  a  second's  delay.  The  pre-selccted  stations 
are  clearly  indicated.  Station  is  kept  exactly  in  tune  by  per- 
fected Automatic  Frequency  Control.  On  eight  of  the  new 
Stromberg-Carlson  models. 

cJlw'e  Ij  nothing  folia*  them  a 


Ml 


\oin  Go*  Radio.  UAttlt  AUTOMATIC 
. .  utatcJi  jjOl  it. 


SEE  YOUR 
MOTOROLA 
DISTRIBUTOR 


Mjotcicta 

AMERICA'S  FINEST  AUTO  RADIO 


SIX  "ACE' 
FEATURE 
MODELS 

S29L'  fo*79?i 


hji  Aiiiir  nnTHDlurt    PADDftDATinw    .   TUIPACA 


i 


▲ 


. 


SPOT  'EM! -and  GO  AFTER    EM! 


DIO 


OUT  FOR  A  BIG  YEAR  IN  1938 


1937  was  one  of  the  best  years  in 
the  entire  history  of  General  Electric 
Radio—  IN  FAG  THE  YEAR  OF  OUR 
GREATEST  PROGRESS. 

General  Electric's  1938  Touch  Tuning 
models  are  leaders  in  design  and  per- 
formance, priced  to  give  great  value 
for  the  consumer's  dollar,  and  a  gen- 
erous profit  opportunity  to  the  dealer. 

The  1938  G-E  Radio  line  was  sup- 
ported by  an  advertising  and  pro- 
motional campaign  second  to  none  in 
effectiveness.  Over  500  leading  news- 


papers— the  large  circulation  maga- 
zines— and  radio  broadcasting  spot- 
lighted and  dramatized  General  Elec- 
tric's powerful  radio  story. 

As  a  result,  more  dealers  than  ever 
before  are  now  lined  up  with  General 
Electric  Radio. 

General  Electric  Radio  sales  to  date 
this  year  are  50  per  cent  greater  than 
the  corresponding  period  of  last  year. 

General  Electric  Radio  is  progres- 
sively planning  for  a  still  greater 
progress  in  1938. 


GENERAL  m  ELECTRIC 


DO 


HERE'S  ANSWER  NO.  2 


A  complete  new  line  of 


fcp 


W^Bit 


f^te&Qi 


ft® 


WB 


MIDGET 
UNIVERSAL  REPLACEMENT 

VOLUME  CONTROLS 
»ith  PLUG-IN  SHAFTS 

(Pat.  Applied  For) 


NOW  56  New  Volume  Controls 

give  you  the  range  of 
over  1000  exact  replacements 


Now — your   problem   of  how   to   make    a    wide 
range   of  volume   control   replacements    quickly 
and  economically  is  definitely  solved. 
Xo  large  stocks  to  carry.  No  more  delays  that 
lose  business  and  customer  good-will!   No  more 
sending  away  for  "exact  replacement"  controls 
you  don't  have  when  you  need  them. 
Through    the   development   of  the   new   Yaxlev 
Midget  Volume  Controls  and  the  introduction  of 
the  new  Yaxley  Plug-In  Shaft,  Mallory -Yaxley 
offers  the  greatest  advance  in  volume  control  ser- 
vicing ever  known  in  radio  history. 
Yaxlev  Midget  Volume  Controls — plain,  single  tap, 
double  tap  and  duals — are  available  in  resistance 
values  from  5,000  ohms  to  3  megohms  inclusive 
and  in  all  necessary  tapers.  They  have  flexibility 
—  adaptability  —  universality  —  and    snap-on 
switches!  But  —  overshadowing  all  these  advan- 
tages is  the  Yaxley  Plug-In  Shaft !  . 
A  single  set  of  Yaxley  Plug-In  Shafts  multiplies 

•  WHAT  WILL  MALLORY-YAXLEY  DO 

Watch 


the  usefulness  of  any  one  of  these  controls  by 
17 — or  more. 

For  Example  —  10  new  Yaxley  Midget  Controls  plus 
17  shafts  give  you  the  servicing  equality  of  170  ordi- 
nary Exact  Replacement  Controls  with  fixed  shafts. 

Now — let's  go  a  step  further!  Multiply  seventeen  or 
more  exact  replacement  possibilities  by  the  fifty -six 
known  basic  type  controls.  To  cover  such  a  service 
range  with  fixed  shafts  (so-called  '"specials")  would 
mean  you  would  need  one  each  of  952  individual  con- 
trols. Yaxley  Midget  Volume  Controls  with  Yaxley 
Plug-In  Shafts  provide  the  same  service  stock  with 
only  56  controls  and  17  Plug-In  Shafts.  And — the 
fact  of  the  matter  is  that  90%  of  your  replacements 
will  be  covered  by  about  12  of  these  56  types  of  con- 
trols plus  6  or  more  of  the  17  Yaxley  Plug-In  Shafts! 

Now  you  can  replace  controls  exactly,  easily  and 
quickly  because  Yaxley  Plug-In  Shafts  reduce  the 
required  investment  and  multiply  the  usefulness 
of  every  control  17  (or  more)  times. 

Order  Yaxley  Midget  Volume  Controls — and  Yax- 
lev Plug-In  Shafts — from  your  distributor  today! 

NEXT? 

for  further  important  announcements! 


P.  R.  MALLORY  &  CO.,  Inc. 
INDIANAPOLIS  INDIANA 

CABLE  ADDRESS— PELMAUO 


RADIO   TODAY,    March,    1938,    Vol.    IV,    No.    3 

yearly  $1.00  in  U.   S.   and  Latin  American  count 

1936.  at  the  post  office  at  Xew  York,  N.   Y.,  under  the  Act  of  March  3,   1879 


No.    3,    published   monthly   by   Caldwell-Clements,  Inc.,   480   Lexington  Ave.,   N 
Duntries;   $1.25   in    Canada;   $2.00  all  other  countries;  single  copy,  25c.   Entered 


York,   N.   Y.     Subscription 

__  as  second-class  matter  July.  24, 

Printed     in     U.  S.  A.       Copyright     1938     by     Caldwell-Clements,     Inc. 


NEVER  IN  RCA  VICTOR  HISTORY  HAVE  SUCH  VALUES  BEEN 
OFFERED!  FEATURE  THESE  SPECTACULAR  BARGAINS 
AND  YOU'LL  SELL  'EM  LIKE  HOT  CAKES! 


Radio  Today 


AT  A  PRICE  TO 
ATTRACT  THOUSANDS/ 


March,  1938 


THE  SWEETEST  CONDENSER 
EVER  DEVELOPED  FOR  THE 
SERVICEMAN!  - 


CA 


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TO 


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CA 

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THE    C-D 

Art  /^\  .-,  .    99 


TYPE   BR   ETCHED 
FOIL  ELECTROLYTICS 


1  ype  BR  etched  foil  electrolytic  capacitor  is  the 
smallest . . .  and  just  about  the  "sweetest" . . .  filter 
condenser  ever  developed.  Study  these  features 
and  see  if  you  don't  agree  that  the  smart  thing  to 
do  is  to  carry  a  stock  of  ten  "Beavers"  with  you. 

J       SMALL  . . .  one-fifth  the  size  of  corresponding  types  for  similar  capacity 

and  voltage  range.  Will  easily  fit  into  most  confined  space. 
O  A  cinch  to  hook-up.  No  mounting  brackets,  no  pal  nuts,  riveting  or 
"  similar  assembly  operations.  Just  wire  in  ...  as  you  would  a  tubular 
condenser.  Avoid  headaches,  delays,  and  eliminate  exact  duplicates. 
'Z  Both  terminals  carefully  insulated;  protective  cardboard  sleeve  supplied 
■*  with  unit.  Polarity  clearly  indicated  Hermetic  seal  assures  long  life. 
A  Available  in  single  capacity  units  only.  Capacities  4,  8,  12,  16,  20 
n       and  40  mfd.,   150  volts,  D.C.,  and  up  to  8  mfd.,  at  450  volts,  D.C. 

Demand  the  condenser  with  the  C-D  emblem . . . 
hallmark  of  quality  for  twenty-eight  years. 

Ask  your  local  C-D  distributor  to  show  you  a 

handy  carton  of  ten' Beavers." 

Gef  set  for  maximum  profits . . .  Stock  up  with  Type  BR. 

Cable  Address:  _       "CORDU" 


CORNELL 


DUBILIER 


ELECTRIC     CORPORATION 

1022  Hamilton  Blvd.,  So.  Plainfield,  N.  J. 


Radio  Today 


RADIOS  NEED 
MILLIONS  OF  NEW 


lS 


ao»° 


I 


IN  MILLIONS  of  homes,  the  family  radios  are  finishing 
a  long  hard  Winter.  They've  been  tuned  in  for  hours 
at  a  stretch  ...  all  day  and  all  evening  .  .  .  and  the  tubes 
have  been  carrying  the  full  load. 

That's  why  Spring  is  one  of  the  best  times  of  all  to  go 
after  tube  business!  And  the  surest  way  to  get  that  re- 
placement tube  business  is  to  go  after  it  with  tubes  that 
everyone  knows  by  name. 

And  there's  no  better  known  name  in  radio  than  PHILCO 
—  the  only  name  that  has  ever  appeared  on  more  than 
ten  million  sets !  Go  after  that  replacement  tube  business 
now  with  Philco  Tubes!  They're  the  natural  first  choice 
of  every  Philco  owner  .  .  .  and  that  means  the  biggest 
group  of  all.  And  Philco  is  the  best -known  name  to 
every  other  radio  owner,  too.  That's  why  they  all  look 
with  added  favor  on  the  dealer  who  offers  Philco  Tubes! 


I/to  /rtAj'ojt  TZJeA  ut  the  WotA/  ifr  £k/l 


The  Handiest  Refrigerator 

Ever  Built! 

Sell  the  SHELVADOR 


Here's  a  refrigerator  in  which 
a  woman  can  get  at  things 
easily.  Nothing  gets  lost. 
The  shelves  in  the  door  permit 
storing  of  small  items  so  in- 
geniously that  you  can  actu- 
ally get  MORE  FOOD  in  the 
Shelvador  than  in  any  refrig- 
erator of  equal  size. 

This  is  still  the  greatest 
sales  story  in  the  refriger- 
ator field  .  .  . 


With  Built-in  RADIO 

The  kitchen  is  fast  becoming  an  important  room, 
for  informal  entertaining  finds  it  the  center  of 
attraction.  This  is  a  feature  women  are  liking 
and  smart  dealers  are  taking  full  advantage  of  it. 


Faster  Freezing 

Greater  Ice-Making  Capacity 

Crosley  Quick-Release  Cube 
Tray 

Lower  Cost  Refrigeration 

Short  Running  Time 
Low  Operating  Cost 
Long  Life  Due  to  Short  Running 


Safe  Refrigeration 
Low  Rox  Temperature 
18-Point  Temperature  Control 
Powerful  Hermetic  Unit 

6.     More  Rugged  Construction 
andbestofall-MORE  US\RLE  SPACE 
with   the   exclusive  shelves-in-the-door. 


THE     CROSLEY     RADIO 
CORPORATION  •CINCINNATI 

POWEL  CROSLEY,  Jr.,  President 

Home  of  "the  Nation's  Station"— WLW— 500,000  watts— 70  on  your  dial 


The  new,  improved  Electrosaver  Hermetic  Unit 
is  more  efficient,  more  economical  than  ever  before. 
Each  unit  is  individually  tested  in  the  Crosley  Prov- 
ing Ground  for  operating  performance  under  the 
most  severe  extremes  of  temperature  and  humidity. 


CROSLEY  SHELVADOR 


Radio  Today 


It  wasn't  a  good  guess ...  it  was 


GOOD  JUDGMENT 


Sixteen  years  ago  RCA  men  knew  radio  so  well 
that  they  based  the  development  of  their  busi- 
ness on  the  belief  some  day  every  home  in  the 
United  States  would  have  a  radio  . . .  Today,  26 
million  homes  and  5  million  cars  have  them. 

FROM  radio's  inception  RCA  men  have  been 
radio  men.  They  have  obeyed  radio's  demand 
for  unremitting  research,  for  tireless  exercise  of  in- 
genuity, for  constant  thinking.  It  is  but  natural  that 
these  men,  through  their  own  labors,  should  have 
acquired  good  judgment  in  all  that  pertains  to  radio. 
Twelve  years  ago,  when  RCA  founded  the 
National  Broadcasting  Company,  RCA  men  were 
veterans  in  radio  communications,  a  youthful  but 
already  mature  art.  Some  years  earlier  they  had 
foreseen  the  coming  of  broadcasting,  had  realized 
its  opportunities  for  service. 


So  it  was  good  judgment,  not  good  guessing,  which 
enabled  RCA  men  to  predict— when  radio  receiv- 
ers were  laboratory  apparatus— that  virtually  every 
home  would  have  a  radio  instrument.  Recent  fig- 
ures place  the  number  of  radio  equipped  homes 
in  the  United  States  at  26,428,797. 

It  is  the  unceasing  endeavor  of  RCA  to  apply 
to  all  branches  of  radio,  at  all  times,  the  good 
judgment  of  which  its  unmatched  experience  has 
made  it  the  fortunate  possessor. 

Foremost  of  all  the  facts  that  good  judgment 
recognizes  about 
radio  is... only  by 
genuine  service  in 
the  public  interest 
can  radio  hold  its 
rightful  place. 


IN  RADIO-AND  TELEVISION 
-IT'S  RCA  ALL  THE  WAY 

Only  the  Radio  Corporation  of  America 
is  engaged  in  every  phase  of  radio.  Its 
long  experience  and  its  resources  are 
coordinated  for  the  advancement  of 
Radio  Communications,  Broadcasting 
and  Manufacture. 


RCA  presents  the  "Magic  Key"  every  Sunday,  2  to  3  P.M.,  E.  S.  T.,  on  NBC  Blue  Network 

(jjf^jj)    RADIO   CORPORATION   OF  AMERICA 

^§|^  RADIO  CITY,  NEW  YORK 

RCA  MANUFACTURING  CO.,  INC.  RCA  INSTITUTES,  INC.  RCA  COMMUNICATIONS,  INC. 

NATIONAL  BROADCASTING  COMPANY  RADIOMARINE  CORPORATION  OF  AMERICA 


March,  1938 


Radi 


i 


'RADIO  GOES  TO   COLLEGE  ...  published  January ,  1 938  by  CBS.  We  will  be  glad  to  mail  you  this  study  on  request. 


Radio  Today 


roes  to  College 


-URN  where  we  may,  investigate  whom  we  will, 
radio  is  discovered  an  intimate  and  important 
and  active  part  of  daily  living! 

College  investigators,  last  Spring,  at  the  request 

of   the   COLUMBIA    BROADCASTING    SYSTEM,    Studied 

the  radio  habits  of  college  students.  They  found 
that  over  95%  of  the  students  listen  regularly  to 
radio.  Even  more  interesting  is  the  amount  of 
college-time  spent  listening  to  radio.  The  average 
male  student  reports  listening  3  hours  each  day 
The  average  woman  student  listens  2  hours  and 
52  minutes  each  day.  This  is  remarkable  when  you 
consider  what  a  busy  person  the  undergraduate 
is!  And  conclusive  evidence,  once  again,  of  how 
well  radio  reaches  everybody:  young  and  old  — 
and  class -markets  as  well  as  mass-markets. 

The  complete  study*  shows  that  America's  mil- 
lion-odd undergraduates  are  remarkably  like 
everyone  else  where  radio  is  concerned.  They  are 
today's  leaders  of  young  people  everywhere; 
tomorrow's  leaders  in  business  and  society.  And 
radio— without  special  effort  — without  extra  cost 
reaches  them  at  the  same  time  it  reaches  the  rest 
of  the  country.  For  everybody  likes  to  listen! 


But  this  is  no  surprise.  It  confirms  the  findings 
of  radio  advertisers  —  and  other  radio  research. 
(A  year  ago  the  cbs  study  of  "the  very  rich— and 
radio"  arrived  at  much  the  same  conclusion  as  the 
college-study.  Like  everybody  else,  the  Very  Rich 
also  like  to  listen  — and  do!) 

Yet,  in  the  cloistered  halls  of  learning  we  un- 
earthed fresh  material  on  a  fine  point.  Everyone 
knows  a  few  people  who  habitually  do  more  than 
one  thing  at  a  time.  Such  people  read  while  they 
eat,  write  while  they  telephone  and— if  they're  at 
college— they  study  while  radio-listening.  But  not 
all  people  double-up  their  activities.  If  we  take 
the  undergraduate  as  a  guide,  we  find  that  most 
people  prefer  doing  one  thing  at  a  time.  Of  the 
2,487  college  students  interviewed,  61.3%  stressed 
the  fact  that  they  do  not  listen  to  their  radios 
while  studying.  But  there's  another  simpler  way 
of  determining  how  well  people  concentrate  when 
they  listen  to  radio.  Make  a  deliberate  mistake 
of  any  kind  on  the  air.  Or  make  an  offer.  You 
will  then  quickly  learn,  from  billowing  bags  of 
mail,  just  how  intently  the  average  listener 
listens  when  his  radio  is  tuned-in!  And  rhar  is  a 
basic  reason  for  radio's  brilliant  record  of  success. 


THE    COLUMBIA    BROADCASTING    SYSTEM 


arch,  1938 


c 


*RADIO  GOES  TO    COLLEG 


E . . .  published  January,  1 938  by  CBS.  We  will  be  glad  to  mail  you  this  study  on  request. 


Radio  Today 


goes  to  College 


A  urn  where  we  may,  investigate  whom  we  will, 
radio  is  discovered  an  intimate  and  important 
and  active  part  of  daily  living! 

College  investigators,  last  Spring,  at  the  request 
of  the  COLUMBIA  BROADCASTING  SYSTEM,   studied 

the  radio  habits  of  college  students.  They  found 
that  over  95%  of  the  students  listen  regularly  to 
radio.  Even  more  interesting  is  the  amount  of 
college-time  spent  listening  to  radio.  The  average 
male  student  reports  listening  3  hours  each  day 
The  average  woman  student  listens  2  hours  and 
52  minutes  each  day.  This  is  remarkable  when  you 
consider  what  a  busy  person  the  undergraduate 
is!  And  conclusive  evidence,  once  again,  of  how 
well  radio  reaches  everybody:  young  and  old- 
and  class-markets  as  well  as  mass-markets. 

The  complete  study*  shows  that  America's  mil- 
lion-odd undergraduates  are  remarkably  like 
everyone  else  where  radio  is  concerned.  They  are 
today's  leaders  of  young  people  everywhere; 
tomorrow's  leaders  in  business  and  society.  And 
radio —without  special  effort— without  extra  cost 
reaches  them  at  the  same  time  it  reaches  the  rest 
of  the  country.  For  everybody  likes  to  listen! 


But  this  is  no  surprise.  It  confirms  the  findings 
of  radio  advertisers  -  and  other  radio  research. 
(A  year  ago  the  cbs  study  of  "the  very  rich-and 
radio"  arrived  at  much  the  same  conclusion  as  the 
college-study.  Like  everybody  else,  the  Very  Rich 
also  like  to  listen— and  do!) 

Yet,  in  the  cloistered  halls  of  learning  we  un- 
earthed fresh  material  on  a  fine  point.  Everyone 
knows  a  few  people  who  habitually  do  more  than 
one  thing  at  a  time.  Such  people  read  while  they 
eat,  write  while  they  telephone  and-if  they're  at 
college— they  study  while  radio-listening.  But  not 
all  people  double-up  their  activities.  If  we  take 
the  undergraduate  as  a  guide,  we  find  that  most 
people  prefer  doing  one  thing  at  a  time.  Of  the 
2,487  college  students  interviewed,  61.3%  stressed 
the  fact  that  they  do  not  listen  to  their  radios 
while  studying.  But  there's  another  simpler  way 
of  determining  how  well  people  concentrate  when 
they  listen  to  radio.  Make  a  deliberate  mistake 
of  any  kind  on  the  air.  Or  make  an  offer.  You 
will  then  quickly  learn,  from  billowing  bags  of 
mail,  just  how  intently  the  average  listener 
listens  when  his  radio  is  tuned-in!  And  that  is  a 
basic  reason  for  radio's  brilliant  record  of  success. 


THE    COLUMBIA    BROADCASTING    SYSTEM 


larch,  1938 


flAR  21   1938 


©C1B    371416 


Staff— 

Darrell  Bartee 
G.  H.  Mavorga 
M.  H.  Newton 
B.  V.  Spinetta 
Vinton    K.   Ulrich 


Lee   Robinson 

Sales    Manager 


Orestes    H.    Caldwell 
Editor 


M.    Clements 
Publisher 


Copyright  1938 

Caldwell-Clements,  Inc. 

4S0    Lexington    Ave. 

New   York,    N.    Y. 

Tel.    PLaza   3-1340 

Vol.    IV,    No.    3 


"THE  AMERICAN  WAY 
OF  DOING  THINGS" 

Let's   talk    frankly   about   American    Broadcasting.     For,    every 
radio  man  — every  listener  — has  a  stake  in  our  present  system 


Radio  in  the  United  States  today  is  free! 

It  is  free  to  the  listener. 

It  is  free  of  government  control. 

And  it  can  be  used  freely  by  those  who  have  a 
message  to  tell.  Having  so  far  avoided  the  govern- 
ment muzzling  and  taxing  which  hampers  radio 
in  other  countries;  American  radio  is  first,  last, 
and  all  the  time,  a  popular  servant  of  the  people! 

As  a  result  American  broadcasting  supplies  the 
finest  programs  anywhere  in  the  world.  The  most 
costly  talent  is  an  everyday  affair.  Music,  news, 
drama,  and  entertainment,  are  available  18  hours 
a  day,  at  the  turn  of  a  dial.  All  these  come  without 
cost — without  fee — to  every  listener.  In  con- 
sequence the  largest  listening  audience  in  the 
world — 37,000,000  radios — has  been  built  up. 
Measured  by  the  standards  of  radio  in  other 
countries,  American  broadcasting  is  a  shining 
example  of  progress  for  other  nations  to  copy. 

But  there  are  those  who  would  tear  down  this 
splendid  structure  built  in  "the  American  Way 
of  Doing  Things." 

Contributed  nothing! 

There  &rz  those  who  would  impose  intolerable 
burdens  upon  America's  now-free  radio — who 
would  restrict  its  operation  in  ways  detrimental 
to  the  public  interest — who  would  inject  the 
dangers  of  government  operation  into  our  free 
institution   of  broadcasting. 


These  critics  who  themselves  have  contributed 
nothing  to  radio's  vast  record  of  achievement, 
would  revamp  and  revise  the  present  structure  to 
fit  their  own  whims  or  political  arguments,  un- 
mindful that  radio  as  it  stands  today  has  been 
tested  through  15  years  of  searching  trial  and 
effort. 

These  critics  seize  upon  single  minor  incidents 
of  program  oversight,  such  as  the  Mae  West 
broadcast — yet  overlook  the  hundreds  of  thou- 
sands of  hours  of  wonderful  musical  and  cultural 
programs  which  are  the  rule  in  broadcasting. 
And,  frowning  at  radio,  they  overlook  the  far 
more  objectionable  obscene  text  and  pictures 
which  certain  illustrated  magazines  are  bringing 
into  American  homes,  carried  by  U.  S.  mailmen. 

Impossible  taxes 

Others  of  these  tinkerers — and  wreckers — of 
American  radio,  would  put  impossible  taxes  on 
American  broadcasting  stations.  The  Boylan  bill, 
proposing  a  tax  of  $1  per  watt  on  small  stations, 
and  $3  per  watt  on  large  ones,  is  an  example  of 
this  vicious  attempt  to  control  broadcasting 
through   intolerable  taxes. 

Others  would  eventually  head  American  radio 
into  government  control  and  government  opera- 
tion, substituting  Washington  bureaucrats  and 
political  appointees  for  present  highly-paid  enter- 
tainment executives  chosen  by  reason  of  their 
expert  qualifications  alone. 


10 


Radio  Today 


License  fees  for  listeners! 

And  in  the  wake  of  government  control  and 
operation,  would  come  a  Federal  license  on 
radio  receiving  sets — a  pall  on  home  enjoyment 
and  education  in  the  form  of  the  heavy  hand  of 
the  government  tax-collector,  taxing  sets  and 
tubes. 

These  are  some  of  the  steps  in  the  vicious  pro- 
gram of  federal  control  and  taxation,  already 
disclosed  by  movements  underway  at  Washington. 

Wake   up — gentlemen   of  the 
radio   industry! 

It  is  time,  therefore,  that  radio  men  and  radio 
listeners  woke  up  to  the  presence  of  the  forces 
that  are  about  to  imperil  radio  listening  and  "the 
American  Way  of  Doing  Things." 

American   broadcasting — like  all   other  human 


institutions — has  some  faults.  But  broadcasting's 
shortcomings  are  minor — and  merely  serve  to 
accentuate  the  merits  of  an  otherwise  magnificent 
— truly  miraculous — public  service.  American 
broadcasting  is  sound  and  healthy,  and  has  grown 
strong  and  vital  under  its  own  initiative. 

In  the  best  interests  of  American  radio,  the 
present  system  must  be  retained  along  its  present 
broad  principles  of  private  operation. 

Americans  don't  want: 

Government  ownership  of  broadcasting. 
Censorship  of  programs. 
Limitation  of  station  service. 
Political  domination  of  radio. 
Bureaucratic  administration  of  programs. 
Taxes  or  licenses  for  radio  listening. 
Those  are  not  "the  American  Ways  of  Doing 
Things." 


ONLY  IN  THE  UNITED  STATES   IS   RADIO  COMPLETELY  FREE 


^_-^S> 


GERMANY 

MUZZLED -TAXED 


__i__  -  -ST.,  GOVERNMENT- 
BRITAIN  0PERAT"- 
W9VIK-III1        LISTENERS 

TAXED 


The  size  of  the  radio  sets  indicates 
the  relative  number  of  radio  homes  per 
thousand  of  population  in  each  country 


The  United  States  leads  in  radio  because  radio  in  the  U.S.  offers  the  best  programs — because  radio  in  the  U.S.  is  free! 


March,  1938 


11 


Dr.  Lee  de  Forest  today.     The  radio 

inventor   at   his   home,    5106    Wilshire 

Boulevard,   Los  Angeles. 

RECORD  IN  RADIO  EXPORTS 

*  For  the  fourth  consecutive  year 
American  radio  exports  in  1937 
reached  a  new  peak,  with  an  increase 
of  14.4  per  cent  over  1936  exports. 
Total  1937  exports  were  $32,357,417, 
compared  with  $28,284,251  in  1936, 
$25,454,188  in  1935,  and  $24,856,592 
in  1934. 

As  compiled  by  the  RMA,  radio 
parts  and  accessories  accounted  for 
the  larger  portion  of  the  increased 
exports  in  1937.  In  dollar  volume 
there  was  an  increase  of  34.9  per  cent 
in  parts  and  accessory  exports;  25.7 
per  cent  increase  in  loudspeakers ; 
15.7  per  cent  in  tubes ;  1.9  per  cent 
in  receiving  sets,  and  47.6  per  cent  in 
transmitting  apparatus.  While  the 
larger  portion  of  exports  occurred 
during  the  last  half  of  1937,  previous 
percentages  of  increase  were  not 
maintained. 

U.S.  APPLIANCES  SOLD 

*  The  electrical  vacuum  cleaner 
business  experienced  its  second  high- 
est January  in  the  industry's  history, 
according  to  the  latest  figures  re- 
leased by  the  Vacuum  Cleaner  Manu- 
facturers' Association.  Sales  for  the 
month  this  year  were  118,127,  com- 
pared to  117,810  for  December,  1937, 
and  124,756  for  the  record  January 
in  1937. 

Total  sales  of  cleaners  for  the  year 
1937  were  set  at  1,706,336  units,  in- 
cluding both  floor  cleaners  and  hand 
cleaners.  A  preliminary  figure  issued 
by  Radio  Today,  1,094,000  cleaners, 
referred  only  to  floor  units. 


Reports  on  factory  shipments  of 
household  washing  machines,  from 
the  American  Washing  Machine 
Manufacturers'  Association  show  that 
January  units  for  1938  totaled  72,611. 
compared  to  55,843  in  December  and 
121,754  in  January,  1937.  The  Asso- 
ciation's complete  figures  for  the  year 
1937  show  that  total  washer  units 
amounted  to  1,642,019. 

8,064,780  SETS  IN  '37; 
92,055,000  TUBES 

*  Exceeding  most  estimates  and 
expectations,  radio  sets  sold  by  manu- 
facturers in  the  fourth  quarter  of 
1937,  totaled  1,992,980,  bringing  the 
year's  total  up  to  8,064,780.  The  1937 
total  thus  came  within  2  per  cent  of 
the  1936  record,  8,248,755  sets.  These 
figures,  obtained  from  licensees,  refer 
to  number  of  sets  reported  sold  by 
manufacturers  to  distributors  and 
dealers.  Actual  sales  to  the  public- 
are  believed  to  be  considerably  less, 
owing  to  the  large  inventory  carried 
over  by  the  trade  in  warehouses  and 
retail  stocks. 

Tube  sales  reported  by  manufac- 
turers for  the  last  quarter  of  1937 
fell  off  to  18,278,000  units— only  59 
per  cent  of  the  same  quarter  of  1936. 
The  total  tube  sales  for  the  year  1937 
— both  initial  equipment  and  replace- 
ment tubes — thus  totaled  only  92,- 
055,000  tubes,  or  6  per  cent  below 
1936. 

Complete   official   set   and  tube  fig- 
ures for  the  past   two   years   follow : 
1936  Sets 

1st    quarter     1,287,462 

2nd    quarter    1.697,444 

Ird  quarter    2,330,959 

4th    quarter     2,932,890 

Total      S, 248,755 


1937 

1st    quarter     1,579,136 

2nd    quarter    1,769,499 

3rd    quarter    2,723,165 

4th    quarter     1,992,9S0 

Total     S, 064, 780 

Tube   sales   by   quarters : 

1936  Tubes 

1st    quarter     IS, 475, 077 

2nd    quarter    19,971,773 

3rd    quarter     28,965,512 

4th    quarter     30,891,S46 

Total      9S,304,20S 

1937 

1st    quarter  22,393,997 

2nd    quarter  24,389,213 

3rd    quarter  26,994,000 

4th    quarter  IS, 277, 790 

Total     92,055,000 


RADIO-TAX  CAMPAIGN  TO  SENATE 

*  The  RMA  campaign  to  repeal 
or  modify  the  Federal  5  per  cent 
radio  excise  tax  is  now  being  waged 
vigorously  in  the  Senate  at  Washing- 
ton, following  omission  of  any  action 
on  radio  in  the  House  tax-revision 
bill  reported  March  2.  Revenue  needs 
of  the  government,  with  the  radio 
tax  raising  over  $6,000,000  annually, 
were  given  as  the  principal  cause  for 
omission  by  the  House  Ways  and 
Means  Committee  of  action  on  the 
radio  tax.  The  House  Committee 
report  stated  that  undesirable  "nui- 
sance" taxes  "should  be  removed 
when  possible,  but  unfortunately  the 
revenue  requirements  of  the  govern- 
ment are  such  that  very  little  revenue 
can  be  spared  at  this  time." 

Despite  the  House  action,  the  RMA 
is  leading  anew  the  effort  before  the 
Senate  Committee,  generally  regarded 
as  more  liberal  than  the  House.  RMA 
members  and  distributors,  dealers 
and  broadcasters  are  now  urged  to 
concentrate  appeals  on  the  Senate. 


Vance    Woodcox,    RCA-Victor    vice-president,    checks    up    package-goods    sales 
with  Joseph  B.  Elliott,  manager  of  Boston  district  office. 


12 


Radio  Today 


Broadcasters   and   public    are    all   get- 
ting   excited   about    facsimile.      Here's 
the    Finch    home    printer,    for    attach- 
ment  to   any   radio. 

CONVENTIONS  DURING 
CHICAGO  PARTS  SHOW 

*  Five  conventions  will  be  held 
in  conjunction  with  the  1938  Na- 
tional Radio  Parts  Trade  Show  at 
the  Stevens  Hotel,  in  Chicago,  June 
8  to  11. 

Activities  of  the  week  will  start 
on  the  day  preceding  the  opening  of 
the  Trade  Show  with  the  annual  con- 
vention of  the  Radio  Manufacturers 
Association.  Annual  conventions  of 
the  Sales  Managers  Club,  "The  Rep- 
resentatives." and  the  National  Asso- 
ciation of  Radio  Parts  Distributors 
will  open  on  Thursday,  June  9.  at 
10  A.M. 

Throughout  the  entire  four-day 
period  the  annual  convention  of 
Radio  Servicemen  of  America  will 
feature  technical  lectures  and  busi- 
ness sessions. 

"FOSTER  LOCAL  MUSIC  TALENT" 

*  The  United  States'  greatest  pro- 
motion of  music,  National  Music 
Week,  has  been  set  as  usual  for  the 
first  week  in  May  and  opens  this  year 
on  May  1.  David  Sarnoff  of  RCA. 
who  is  chairman  of  the  Music  Week 
Committee,  comments  that  the  event 
is  half  a  celebration  of  widespread 
music  activity,  half  '  a  stimulus  to 
musical  projects  and  to  fuller  enjoy- 
ment. 

Scores  of  national  organizations, 
the  musical  ones  as  well  as  the  Par- 
ent-Teachers, Boy  Scouts,  YWCA, 
YMCA,  etc.,  are  represented  on  the 
committee,    and    all    the    local    chap- 


ters of  these  groups  are  expected  to 
break  into  song  when  the  time  comes. 
Since  all  radio  dealers  and  distribu- 
tors are  acquainted  with  these  local 
groups,  it  appears  to  be  the  ideal 
time  to  go  out  and  sell,  in  a  special 
way,  the  networks'  musical-educa- 
tional features.     Via  better  radio  sets. 

THE  DUMMIES  STILL 
MAKE  DUMMY  TUBES 

'  *  In  Chicago,  a  few  manufactur- 
ers are  still  cluttering  up  their  sets 
with  dummy  tubes  in  an  effort  to 
impress  the  public  with  many-tubed 
sets.  The  Chicago  Better  Busine^ 
Bureau  is  hot  on  their  heels.  It  will 
be  remembered  that  Radio  Today 
started  the  skirmish  nationally  last 
November,  with  the  publication  of  a 
trade-shaking  expose  on  the  same 
subject. 

The  Chicago  Bureau  reproduces  in 
its  bulletin,  an  ad  showing  a  radio 
priced  at  $39.50.  The  bulletin  goes  on  : 
'"The  advertisement  indicates  that 
the  radio  contains  '15  tubes.'  Ex- 
perts who  examined  the  set  stated 
that  8  of  the  so-called  tubes  are  so 
connected  that  the  filaments  light, 
but  the  other  elements  of  the  tube 
perform  no  useful  function.  It  was 
found  these  tubes  can  be  removed 
without  stopping  or  interfering  with 
the  performance  of  the  receiver.  Ac- 
cording to  one  expert,  this  radio  is 
'actually  a  7-tube  receiver  and  could 
be  reduced  to  a  6-tube. 


Fred    E.    Johnston,    new    chief    radio 

engineer     for      Stewart- Warner,      has 

been  active  in  radio  since   1909. 


The  trend  of  1938  auto-radio,  is  drawn 

by    March    Fisher,    Philco    auto-radio 

manager. 

"A  local  retailer  advertised  a  new 
1938  10-tube  radio  at  $16.88.  Three 
of  the  ten  tubes  are  resistors  or  bal- 
last tubes  in  glass  envelopes  shaped 
like  tubes. 

"A  radio  purchased  from  a  local 
retailer  was  described  as  having  15 
tubes,  a  14-inch  speaker,  and  the 
capacity  to  bring  in  world-wide  re- 
ception. 

"When  examined  by  a  competent 
radio  man,  it  was  revealed  that  only 
7  of  the  15  tubes  performed  a  useful 
purpose  and  that  the  other  8  could  be 
removed  without  stopping  the  opera- 
tion of  the  receiver." 

"GET  THE  MONEY!" 

*  A  word  on  collecting  accounts 
from  Leslie  Rucker,  of  Washington. 
D    C,  parts  jobber: 

"Remember  this,  boys,  the  man 
who  collects  his  money  and  pays  his 
bills  and  owns  his  home  and  a  nice 
car  is  the  respected  citizen.  Even 
though  he  may  be  a  so-and-so  for  col- 
lecting, he  is  still  the  good  dresser 
and  prosperous,  and  is  respected  as 
such. 

"Banks  lend  money.  Unless  you 
are  a  bank  don't  try  to  compete  with 
the  banks. 

"Collect  your  money  and  dog  the 
life  out  of  the  man  or  woman  who 
fails  to  pay  you — and,  Mister,  you 
will  succeed.  Call  them  ten  times  a 
day  if  you  can  reach  them  and  they 
will  pay.  Tou  may  lose  a  customer 
but  you  will  live  better." 


March.  1938 


13 


END  THIS  "DOG-EAT-DOG! 

Control  of  production  would  cure  many  of  radio's  trade  evils 
Vigorous  selling  and  promotion  now  needed  to  rebuild  industry 


» 


*  THOUSANDS  of  radio  dealers 
have  written  Radio  Today  to  report 
distressing  trade  situations  and  dif- 
ficulties they  are  experiencing  in 
their  own  territories. 

Manufacturers  are  accused  of  over- 
producing, overloading  jobbers,  dump- 
ing, making  an  excessive  number  of 
models  in  each  line,  and  lack  of  con- 
trol over  their  distributors. 

Distributors  are  accused  of  selling 
every  two-by-four  outlet,  supplying 
discount  houses,  extending  ridiculous 
terms  and  careless  credits,  and  refus- 
ing to  cooperate  in  price  mainten- 
ance measures  for  retailers. 

Retailers  are  accused  of  utter  dis- 
regard of  good  selling  practices,  lack 
of  knowledge  of  the  product,  tran- 
shipping, price  cutting,  poor  repre- 
sentation and  general  lack  of  aggres- 
sive selling  effort.  A  summary  of  all 
these  trade  evils  appeared  under  the 
title  "Dealer  Volcano  Erupts"  in  our 
issue  for  February  (pages  12,  13,  and 
18). 

Enemy  number  1 

Analyzing  these  thousands  of  deal- 
ers' complaints,  and  presenting  the 
situation  thus  revealed,  to  leading 
figures  in  the  radio  industry,  the 
editors  have  developed  much  con- 
structive discussion  and  comment 
which  has  in  turn  been  finally  crys- 
tallized into  a  set  of  principles  for 
the  guidance  of  the  radio  industry. 

Radio's  enemy  No.  1 — according  to 
all  the  experts  called  in  to  feel  the 
pulse  of  our  sick  industry — is   Over- 


Production.  In  the  wake  of  this  No. 
1  evil,  many  other  evils  follow.  If 
these  other  ills  are  to  be  cured,  elim- 
ination of  over-production  is  first  on 
the  list.  Already  the  RMA  is  col- 
lecting monthly  statistics  of  radio- 
set  manufacturers,  as  a  first  step  to 
study — aud  remedy — overproduction. 
If  production  can  be  controlled,  and 
factory  outputs  can  be  kept  in  step 
with  sales,  many  difficulties  will  au- 
tomatically clear. 

Indiscriminate  appointment  of 
new  outlets  and  new  dealers,  without 
respect  to  the  sales  possibilities  of 
the  surrounding  territory  and  the 
consequent  hardships  worked  on  all 
dealers  thereafter,  has  been  another 
major  evil  indulged  in  by  an  indus- 
try crazed  to  find  outlets  for  ex- 
cessive volume. 


Better  prices 


The  whole  price  structure  in  radio 
is  in  need  of  stiffening.  With  fair- 
trade  laws  operating  in  most  states, 
prices  can  be  firmed  and  dealers' 
margins  protected,  if  the  industry 
wants  a  sound  price  situation.  Trade- 
in  allowances,  courtesy  discounts,  in- 
dustrial-plant buying,  and  discount- 
house  operations  are  all  factors  in 
price  maintenance. 

Special  compensation  in  the  form 
of  spiffs,  salesmen's  commissions, 
dealer  cruises,  premiums  and  "deals," 
must  be  cleaned  up.  Misleading  ad- 
vertising (counterfeit  sets  with 
dummy  tubes,  for  example)  will  have 
to  be  stopped,  with  the  responsibility 


for  policing  up  to  those  who  have  the 
good  name  of  radio  at  heart. 

The  unit  values  of  radios  must  be 
raised  by  sales  of  more  quality  sets, 
to  offset  the  popular  tide  toward  in- 
expensive radios.  Quality  sets  can 
be  sold  only  if  the  radio  man  will 
take  the  trouble  to  "demonstrate  the 
difference"  between  a  good  radio  and 
a  cheap  radio. 


All 


in  same 


boat! 


All  the  groups  in  radio — dealers, 
distributors,  manufacturers,  service- 
men and  broadcasters — have  a  com- 
mon interest.  All  should  recognize 
this  mutuality  so  that  the  various 
groups  work  together  for  the  general 
benefit  of  radio. 

While  many  industry  leaders  have 
been  consulted  by  the  editors  ot 
Radio  Today,  and  have  collaborated 
in  the  ideas  appearing  in  the  fore- 
going, and  in  the  Platform  of  Fif- 
teen Planks  for  Better  Radio  Busi- 
ness shown  on  these  pages,  certain 
well  known  figures  permitted  them- 
selves to  be  quoted  directly  as  fol- 
lows : 

End  liquidation 

"Briefly,  if  there  is  to  be  any  re- 
lief at  all  within  the  industry,  I  feel 
it  should  come  from  the  manufac- 
turers in  the  form  of  controlled  pro- 
duction," declares  Frank  W.  Greusel, 
well-known  Milwaukee  distributor 
with  long  experience  in  association 
work.  "To  me  it  seems  a  terrific  in- 
dictment   against    the    industry    that 


Control   factory   outputs! 


Go  out  and  sell! 


the  intelligent  producers  of  today 
should  not  be  able  to  coordinate  their 
thinking  to  a  point  where  the  indus- 
try can  be  made  profitable  to  every- 
one without  repeating  constantly  the 
liquidation  process  which  seems  to  be 
a  regular  and  accepted  practice.  Cer- 
tainly within  a  limited  number  of 
hrands  is  a  heavy  percentage  of  the 
total  volume  which  should  make  it 
practical  to  improve  conditions  to  a 
great  extent." 

"If  it  were  possible  to  adopt  a  def- 
inite, carefully-arrived-at  policy  and 
follow  it  out,  a  great  deal  would  be 
accomplished,"  comments  Ernest  Al- 
schuler,  president  of  Electrical  Re- 
search Laboratories,  Chicago.  "I  feel 
that  radio  stands  almost  alone  as  an 
industry,  without  any  concerted  co- 
operative effort  on  the  part  of  the 
leaders,  but  rather  there  is  a  deter- 
mination of  dog-eat-dog. 


paper  advertisements  as,  'how  much 
is  your  radio  worth?' — 'Name  your 
own  allowance' — 'if  you  are  waiting 
for  the  top  allowance  on  your  present 
radio,  now  is  the  time  to  act.' 

"If  we  could  actually  secure  a  pol- 
icy of  operation,  even  though  it 
might  be  broad  in  every  sense,  we 
could  not  help  but  obtain  a  more  sat- 
isfactory condition  than  the  unstable 
one  we  now  have." 

Selective  dealerships 

William  H.  Ingersoll,  marketing 
authority  and  Fair  Trade  expert  of 
national  prominence,  believes  that 
what  the  radio  industry  needs  is  more 
interest  on  the  part  of  manufacturers 
in  the  health  of  their  radio  outlets. 

Mr.  Ingersoll,  who  is  now  active  in 
the  radio  and  appliance  field  as  a 
special   advisor   to   New  York   dealer 


Fair-trade 


"Dealers  should  avoid  lines  which 
are  marketed  without  regard  to  their 
interests.  Under  current  circum- 
stances, they  should  avoid  the  prod- 
ucts which  are  sold  without  fair  trade 
agreements,  they  should  ignore  manu- 
facturers who  have  no  formal  trade- 
in  policy,  and  they  should  be  cool  to 
that  merchandise  which  is  available 
to  their  prospects  through  discount 
houses  and  other  illegitimate  out- 
lets." 

Mr.  Ingersoll  believes  that  great 
benefits  would  be  forthcoming  from 
more  cooperation  between  radio  deal- 
ers and  the  broadcasters,  and  that 
distributors  and  manufacturers 
should  remember  that  their  product 
is  sold  to  be  listened  to. 

He  has  great  faith  in  the  Fair 
Trade  laws  which  are  in  force  today, 


RADIO  TODAY'S   PLATFORM   FOR   DETTER   BUSINESS  IN  RADIO 


1 .  Control  production. 

2.  Restrict  retail  outlets  to  potentialities 
of  territory. 

3.  Maintain    resale    prices    under    fair- 
trade  laws. 

4.  Fix  trade-in  allowances. 

5.  Limit  number  of  lines  carried. 

6.  Cut  out  "courtesy  discounts",  indus- 
trial buying,  and  "discount  houses." 

7.  Eliminate  spiffs,  cruises,  special  com- 
pensation. 


8.  Clean   up   misleading   advertising. 

9.  Raise  unit  level  of  receiver  sales. 

10.  Demonstrate   quality   sets   "to  show 
the  difference." 

11.  Put   an    end   to   "rackets"   and  dis- 
honest practices. 

1 2.  Cooperate  with  broadcasters. 

1  3.  Tie-in    all    groups  —  manufacturers, 
distributors,  dealers  and  service  men. 

14.  Promote  radio  in  papers  and  on  air. 

15.  Sell    vigorously  —  in   the   store,  by 
telephone  and   in  the  home. 


Stabilize 

"Some  of  the  answers  as  disclosed 
in  your  'Volcano  Erupt'  article  are 
interesting  and  quite  intelligent,  and 
if  a  committee  would  analyze  and  act 
on  some  of  the  criticisms,  there  is  no 
■doubt  but  that  material  benefit  could 
be  had.  Broadly,  as  we  all  now  ope- 
rate, there  is  no  consideration  for  a 
policy — no  effort  to  operate  as  a 
nnit — but  independent  action  for  in- 
dividual benefit.  The  result  is  un- 
certainty in  the  minds  of  everyone, 
resulting  from  cut  prices,  misleading 
advertising  and  the  multitude  of 
sins  brought  out  in  the  article  ap- 
pearing in  your  February  issue  and 
vividly    confirmed    by    current    news- 


organizations,  has  observed  the  pro- 
cedure in  other  industries  and  says 
flatly  that  the  current  evils  of  the 
radio  business  are  more  fatal  and 
more  foolish  than  the  mistakes  being 
made  in  other  fields. 

He  proposes  that  manufacturers 
use  definite  standards  in  the  selection 
of  dealers,  and  that  unqualified  out- 
lets be  checked  out  of  the  field.  He 
feels  that  dealers  should  be  able  to 
count  on  trade  areas  that  are  pro- 
tected and  fixed. 

"Dealers  should  limit  their  lines, 
and  not  fret  about  occasional  cus- 
tomers asking  for  merchandise  they 
do  not  stock.  They  should  develop 
more  confidence  in  their  talent  to 
sell  what  products  they  have. 


and  insists  that  radio  men,  pulling 
together,  will  find  the  regulations  ex- 
tremely beneficial.  He  declares  that 
strong  trade  associations  of  radio 
dealers  can  exert  powerful  influence 
in  the  direction  of  cleaner  business, 
and  is  today  lending  his  support  to 
the  formation  of  a  national  organiza- 
tion of  radio   and   appliance   dealers. 

Act/on,  not  complaints 

"Unless  an  all-inclusive  plan  is  de- 
vised that  will  bring  all  elements 
who  benefit  from  radio  into  a  great 
cooperative  movement  the  existing 
intolerable  conditions  in  the  indus- 
try not  only  won't  be  cured  but  will 
grow  even  worse,"  comments  Ben 
Gross,    of    Gross    Sales,    Inc.,    New 


March,  1938 


15 


York.  "Any  industry  that  so  func- 
tions as  to  make  it  impossible  for 
retailers  to  profit  from  the  sale  of  its 
products,  is  doomed  to  failure.  Man- 
ufacturers have  shown  an  utter  dis- 
regard for  this  condition  and  have 
thus  been  parties  to  the  destruction 
of  the  best  efforts  of  the  trade.  Pub- 
lic confidence  and  trust  in  radio  as  a 
business  and  in  the  men  engaged 
therein  has  been  destroyed  by  the  sel- 
fish greed  of  certain  factors. 

"Complaint,  criticism  and  resolv- 
ing will  never  cure  the  condition. 
The  conflicting  groups  will  not  get 
together  on  such  a  platform  to  af- 
fect a  cure-all  because  of  a  lack  of 
mutual  trust. 

"A  common  ground  of  a  new  na- 
ture must  be  found.  Something  that 
will  engage  public  interest  and  which 
will  be  free  of  personal  conflict  be- 
tween groups,  something  that  will 
benefit  all.  Upon  that  as  a  founda- 
tion of  constructive  joint  effort,  a 
new  spirit  can  be  created  that  will 
bring  about  harmony  of  action  to  re- 
build the  industry  along  sound  lines. 

"Five  point  plan" 

"There  are  five  major  elements  in- 
terested in  radio:  1 — Broadcasters 
and  program  sponsors,  2 — Public 
utilities,      3 — Radio      manufacturers. 


"A    little    hand    shall    lead    them"    to 
push-button    tuning  —  Master    Krumm 
of    Sentinel    tests    his    father's    photo- 
graphic skill. 


4 — Radio  distributors,  5 — Radio  re- 
tailers and  servicemen. 

"I  propose  a  revival  of  the  plan 
presented  to  the  Industry  in  1934, 
then  approved  unanimously  by  the 
boards  of  directors  of  the  national 
associations  of  radio  manufacturers 
and  radio  wholesalers.  That  plan 
known  as  the  'Five-Point  Plan  for 
Revitalization  of  the  Radio  Indus- 
try,' can  well  be  brought  up  to  date, 
revamped  to  suit  present  conditions, 
and  adjusted  to  satisfy  all  elements 
and  factors.  It  can  be  made  the  ve- 
hicle for  rebuilding  this  grand  busi- 
ness to  greater  heights  than  ever 
known  and  to  restore  public  respect 
and  confidence  in  radio  and  in  the 
people  in  the  industry. 

"Without  some  such  all  enveloping 
movement,  all  segregated  efforts  will 
go  for  naught  because  the  destruc- 
tion has  already  gone  too  far  to  be 
reversed  by  anything  but  a  tremen- 
dous effort  engaged  in  simultaneous- 
ly by  all." 

Hot  turnover 

"The  major  answer  to  the  question 
of  what  makes  a  prosperous  retail 
radio  business  is  still  the  same  as 
ever,"  declares  Harry  Boyd  Brown, 
Philco  merchandising  manager.  "And 
this  one  answer,  to  a  very  large  de- 
gree, remedies  those  developments 
which  hurt  the  industry.  For  the 
retail  radio  dealer  it  simply  amounts 
to  stocking  that  radio  merchandise 
which  has  the  widest  public  accept- 
ance and  which  offers  the  greatest 
value  for  the  money — and  then  stock- 
ing nothing  else,  thereby  getting  the 
necessary  speed  in  turnover.  This 
sounds  like  a  simple,  old-fashioned 
formula,  but  it's  as  true  now  as  it 
ever  was. 

"If  the  radio  dealer  concentrates 
on  hot  merchandise  he  keeps  his  in- 
vestment down,  gets  fast  turnover, 
and  makes  a  satisfactory  profit. 

Sell  old  customers 

If  the  radio  dealer  will  vigorously 
sell,  that  will  provide  the  solution  of 
most  of  the  difficulties  the  trade  is 
experiencing,  comments  Ross  L.  Sira- 
gusa,  president  of  Continental  Radio 
&  Television  Corp.,  Chicago.  Every 
survey  made  of  American  homes  has 
shown  that  radio  sets  now  in  use  are 
on  the  average  three  to  four  years 
old  and  need  replacing.  If  the  radio 
man  will  energetically  follow  up  his 
old  accounts  of  a  few  years  before, 
he  will  find  a  lot  of  sales  awaiting 
him.  Meanwhile  he  should  be  cau- 
tious in  his  buying,  limiting  his  com- 
mitments to  his  needs,  so  as  not  to 
load   his   store  up   with  needless   in- 


FOR  LOCAL  LISTENING! 


RCA  Victor  launches  a  new  trend 
with  its  Symphony  model.  Designed 
for  nearby  stations  only,  with  empha- 
sis on  tone.  No  distance  sensitvity;  no 
short-waves.   Push  buttons;  no  dial. 

ventory.  Six  to  four  weeks  com- 
mitments should  be  the  limit — for, 
the  distributor  can  well  gamble  on 
two  to  three  weeks,  and  the  factory 
on  the  balance. 

If  the  dealer  will  buy  as  he  needs, 
and  sell  hard  every  hour  in  the  day, 
radio's  troubles  will  be  at  end. 


Controlling 


Volumes  have  been  written  on  the 
troubles  of  radio  distribution,  and 
volumes  more  undoubtedly  will  be 
written  before  the  complete  solution 
to  the  problem  is  found.  The  situa- 
tion is  a  complex  one,  requiring  much 
patient  study  and  effort. 

Yet  when  the  salient  points  of  the 
present  trade  dilemma  are  all  ana- 
lyzed, it  appears  that  two  principles 
set  down  on  this  page  among  the 
Fifteen  Planks,  have,  after  all,  a 
controlling  influence  on  present 
radio-trade   picture. 

First  comes  intelligent  control  of 
production,  by  the  manufacturers, 
based  on  knowledge  of  purchasing 
power  for  the  radio  merchandise  In- 
volved. 

Selling  will  sell 

Second  comes  the  matter  of  even 
more  vigorous  selling  by  the  radio 
trade,  to  move  the  merchandise  al- 
ready in  store  or  warehouse.  To  this 
end,  all  the  combined  arts  of  adver- 
tising, window  display,  store  arrange- 
ment, telephone  canvassing  and  home 
demonstrations  must  be  marshaled. 

Selling  will  sell.  And  the  radio 
recession  has  no  terrors  for  the  radio 
man  who  is  "eternally  at  it"  selling 
radios — early  and  late,  hour  after 
hour,  calling,  selling,  demonstrating, 
closing. 

Selling   will    sell! 


Radio  Today 


*  WITH  only  one  automobile  in 
four  equipped  with  radio,  the  auto- 
motive field  today  offers  radio's  big- 
gest unsaturated  market.  Thousands 
of  ear-owners  in  every  community 
are  prospects  for  auto-radios.  The 
motorist  is  progressively  becoming 
more  conscious  of  the  full  advantages 
of  "listening  while  you  ride."  News- 
paper advertising,  circulars,  and 
dealer  effort  have  all  contributed. 

During  1938  an  additional  oppor- 
tunity for  selling  auto-radio  is  pre- 
sented by  the  present  doldrums  in 
new-car  production.  With  automotive 
dealers,  making  a  determined  effort  to 
clear  the  congested  used-car  market, 
and  with  many  car-owners  reconciled 
to  keeping  their  present  cars  another 
season,  auto-radio  presents  an  imme- 
diate means  of  modernizing  all  these 
old-car  models.  "Be  up-to-date  with 
auto-radio"  will  be  the  1938  motto  of 
many  a  merry  motorist  and  used-car 
dealer. 


PROFITS  IN   1938  AUTO-RADIO 

Present  owners  and  used  car  market  should   speed  radio  sales 
Push-button  control,  lever  tuning,  and  single-unit  receiver  models 


Push-button  tuning  has  definitely 
taken  hold  in  the  auto-radio  field. 
Lever  tuning  models  are  available  in 
the  lower  price  brackets,  while  elec- 
tric motor  mechanisms  are  used  in 
other  models. 

To  date,  push-button  tuning  has 
been  announced  by  Admiral,  Arvin, 
Belmont,  Chevrolet,  Crosley,  Delco, 
Motorola,  Trav-ler  and  Zenith.  Prices 
on  these  models  range  from  $25  to 
$79.95. 

Single-unit  sets 

Some  of  the  sets  are  designed  for 
mounting  behind  the  instrument 
panel  and  are  complete  in  a  single 
unit.  These  receivers,  designed  pri- 
marily for  use  in  the  older  car  models 
are  priced  from  $20 — and  considering 


the  low  cost,  perform  remarkably 
well.  And  almost  every  manufac- 
turer has  included  in  its  line  one  of 
these  single-unit  sets  for  mounting 
on  the  panel. 

For  maximum  radio  enjoyment  the 
radio  dealer  has  many  models  in  the 
$40  to  $60  class.  And  the  features  are 
automatic  tuning,  high  power  output, 
exceptional  tone  quality,  custom  dash 
controls.  Temperature  compensation 
of  the  tuned  circuits  has  been  added 
in  some  models  to  stabilize  reception. 

Then  too,  there  are  many  engineer- 
ing developments  taking  place  in  auto 
radio  design  which  ordinarily  do  not 
receive  much  publicity.  A  few  of 
them  follow. 

Most  of  the  effort  in  the  improve- 
ment of  signal  to  noise  ratio  matter 
is  being  put  forth  by  the  receiver 
manufacturer  rather  than  by  the  car 
manufacturer — not  because  of  any 
unwillingness  by  the  latter,  but  more 
because  the  former  has  so  much  more 
to  work  with. 


a  single  suppressor  resistor  in  the  dis- 
tributor lead  has  superseded  the  use 
of  a  suppressor  for  each  plug.  Tire 
static  has  been  greatly  relieved  by 
applying  well-designed  collectors  to 
front  and  sometimes  rear  wheel  bear- 
ings. 

Automatic  noise  suppression 

Interference  suppression  within  the 
receiver,  however,  has  been  made  re- 
markably effective.  Let  us  examine 
some  of  the  features  of  one  particu- 
lar receiver  bearing  on  improvements 
in  the  signal  to  noise  ratio. 

Antenna   stage   gain   has   been    in- 


Interfi 


duced 


wr 


Admiral  sub-dash  receiver  with  push- 
button tuning  and  slide  rule  scale. 


erence  re 

Principal  sources  of  interference 
on  a  motor  car  are  ignition  radiation 
and  tire  static.  The  suppression  of 
ignition  noise  at  the  source  is  not  as 
feasible  as  its  suppression  within  the 
receiver.     The  practice  of  employing 


Custom  dash  controls  are  featured  on 
this  Admiral  set  made  by  Continental. 


March,   1938 


17 


MORE  AUTO  RADIOS 


creased  to  a  maximum  of  about  forty, 
with  consequent  reduction  of  noise. 
An  automatic  noise  suppression  cir- 
cuit has  been  incorporated  whereby 
inverse  feedback   of   the   high   audio 


Belmont's  model  677   with  lever  type 
push   button   tuning  for   6   stations. 


Trav-Ler  type  711  with  7  metal  tubes 
and    cowl    type    speaker — $59.95. 


Push     button     tuning     and     separate 
speaker  are  featured  in  Zenith  5M294. 


frequencies  occurs  automatically  in 
inverse  proportion  to  signal  level. 
This  circuit  is  designed  to  become 
operative  when  the  signal  drops  to 
7  microvolts,  and  the  automatic  tone 
control  effect  increases  as  the  signal 
continues  to  fall  below  this  level. 

An  adaptation  of  the  usual  local- 
distance  switch  may  be  used  to  re- 
duce the  set's  sensitivity  until  its 
threshold  is  about  70  microvolts. 
However,  this  circuit  has  a  trigger 
effect  such  that  once  a  carrier  ex- 
ceeds the  threshold,  the  signal  is 
thereafter  held,  regardless  of  how 
much  further  its  level  may  have 
dropped.  Hence  the  receiver  is  made 
unusually  quiet  with  respect  to  ex- 
ternal noises,  as  atmospherics,  street 
car  interference,  etc. 

To  compensate  for  the  acoustical  in- 
terference of  mechanical  and  windnoise 
due  to  high  speed  driving,  a  wind- 
actuated  volume-increasing  switch 
comes  into  play  at  about  40  miles 
per  hour  (high  gear).  This  switch, 
being  located  behind  the  cooling  fan, 
is  actuated  by  a  combination  of  car 
speed  and  engine  speed,  so  that  the 
noise  of  first  or  second  speed  driving 
is  automatically  accounted  for. 

Easy  installation 

In  general  the  1938  ears  have  been 
designed  with  very  considerable 
thought  on  behalf  of  reducing  radio 
installation  effort. 

This  reduction  of  effort,  however, 
exists  only  for  the  receivers  expressly 
engineered  for  the  individual  cars, 
and  there  is  a  tendency  to  increase 
the  installation  difficulties  for  "uni- 
versal" type  receivers. 

The  growing  popularity  of  instru- 
ment panel  receivers  illustrates  this 
point;  space  and  contour  considera- 
tions virtually  limit  the  installation 
to  that  of  a  receiver  expressly  de- 
signed for  the  particular  car. 


Car  manufacturer's  influence 

Push-button  tuning  has  taken  a 
firm  hold  of  the  contract  auto-radio 
field  by  virtue  of  its  success  as  a 
sales  stimulant.  Being  stressed  as  a 
strong  feature  by  the  independent  re- 
ceiver manufacturers  as  well  as  by  at 
least  one  car  manufacturer,  it  bids 
fair  to  become  almost  universal  on 
future  receiver  designs.  Any  techni- 
cal objections  which  might  now  be 
raised  on  the  subject  of  complexity 
and  chance  for  failure  in  the  field 
are  already  being  answered  by  the  de- 
signing engineers  of  the  receiver 
manufacturers.  Push-buttons  have 
come  to  motordom  to  stay — at  least 
for  another  year! 


Delco's    new    line    includes    automatic 
tuning,   custom   controls. 


Cavalier     Motors     provide    choice     of 

steering      column,      and      instrument 

panel  controls. 


Lever  tuning  for  5  stations  is  offered 
in   this   compact   Belmont   model   577. 


ADDITIONAL  SPECIFICATIONS  OF  AUTO  RADIO  SETS  CONTINUED  FROM  FEBRUARY 


Model 
No. 


Watts     Amps. 
List     No.  of     audio       batt.      R.F. 


Speaker 


Type& 
Recep-    location 
Tone        tion        tuning     Type  Type   of     Dimensions 


price      tubes      power      drain     amp.  Size  Type  Location  control  control    controls     ant.    vibrator       of    chassis 
Belmont  Radio  Corp.,  1257  Fullerton  Ave.,  Chicago,  111. — "Belmont" 

677  NS         6-OM  534  7.0       Yes      8        EE  Set  Yes  Yes      Lever-IP 

577  NS         5-OM  2H  5.6       No       5        EE  Set  No  No       Dir-Lever 

Cavalier  Motor  Associates,  Ltd.,  1028  Linden  Ave.,  Baltimore,  Md. — "Autophone" 


/75-3501  Non  S  8^x8^x6 
1  wt$  ]  Non  S     6x6xllK 


I.F. 
peak 


465     1,2,3,4,5,7 
465     9,  7 


M85T  25.95     5-0  2  5  Yes      6        EE 

M85S  30.95     5-0  3  5J4      No       6        EE 

Zenith  Radio  Corp.,  6001  Dickens  Ave.,  Chicago,  IU. — "Zenith' 


5M291 
5M294 
6M292 
6M293 
6M295 


29.95  5-0 

39.95  5-0 

44.95  6-0 

49.95  6-0 

59.95  6-0 


7 
7 
7J4 

7H 


No 
No 
Yes 
Yes 

Yes 


EE 
EE 
EE 
EE 
EE 


Set 
Set 

f     Cowl' 
\Hdr-IP  j 

Set 
I     Cowll 
\Hdr-IP  j 


NS  NS  Dir  NS  Non  S  10x7x7 

NS  NS  Rem-IP  Hi-lo  Non  S  934x734x634 

Yes  No  Dir  Hi-lo  Non  S  534x6^x1134 

Yes  No  Dir-PB  Hi-lo  Non  S  5J4x6%xll34 

Yes  Yes  Rem-IP  Hi-lo  Non  S  6M*8S<x9j| 

Yes  Yes  Rem-IP  Hi-lo  Non  S  634x834"x9i  g 

Yes  Yes  Rem-PB  Hi-lo  Non  S  6Hx834xl0ij 


TRF    1 

456     1 

456  4,  9 

456  4, 9 

25234  1.  2,  4 

252  M  1,  2,  4 

252'2  1,  2,  4 


For   explanation  of   codes   used    in   this  tabulation   and  for   a   complete   listing   of  20   other   auto    radio   manufacturers,    please    refer   to    page   20    of   the    February    issue   of 
RADIO    TODAY. 

Sets    listed    in    the    February    issue    were    Automatic,  Admiral,    Fada,    Motorola,    General    Electric,   Tiffany-Tone,    Howard,    Airline,    Arvin,    Pacific,    DeWald,    Radolek,    RCA- 

Victor,    Philco    Transitone,    Trav-Ler,    Troy,    Universal,  Delco,    Lafayette,    and    Zephyr. 


18 


Radio  Today 


GRtAT 

?6R  '3$ 


FA 


UNDER    DASH 

A  D  I  0 


70UCH6MTIC 

f2d* 


FjAST  year  we  presented  the 
'  first  auto  radio  equipped  with 
automatic  tuning.  Again,  a  step 
ahead  of  the  parade,  we  have 
developed  an  underdash  auto  ra- 
dio with  built-in  automatic  tuning 
...  all  at  a  sensationally  low  price. 

Five  stations  are  easily  and  quick- 
ly assigned  for  automatic  tuning. 
A  mere  push  on  the  button  in- 
stantly and  accurately  rotates  the 
variable  condenser  and  dial  to 
the  desired  station  with  the 
same  precision  and  accuracy  as 
if    carefully    tuned-in    by    hand. 


IMMTIMCMTil      R  A  n  1  11     A  Kin     TFirVKMN 


A  sample  of  expert  emphasis  on  quality  consoles — a  window  display  which  sets 
off  the  appeal  of  higher-priced  sets,  by  Weeks  &  Dickinson,  Binghamton,  N.  Y. 


SALES  THAT  COUNT  UP 

Larger  sets  point  in  direction  of  plus  profit 


*  DEALERS  are  checking  up  on 
how  many  of  their  prospect-families 
have  a  satisfactory  radio  listening 
future. 

Part  of  the  plan  is  to  see  that  each 
member  of  the  family  has  the  neces- 
sary personal  receiver,  because  the 
house  will  be  a  shambles  if  every- 
body makes  a  pass  at  the  same  dial. 
And  part  of  the  plan  is  to  see  that 
the  family  has  a  first-rate  center-spot, 
for  radio  interest — a  fine  quality 
console  with  all  the  technical  trim- 
mings and  all  the  musical  reach  of  a 
master  instrument. 

Sound  proposition 

Consoles,  it  happens,  are  not  only 
the  biggest  contribution  that  a  deal- 
er can  make  to  the  modern  fireside, 
but  they  are  also  the  most  profitable 
sets  to  handle  and  many  a  dealer  is 
thinking  hard  right  now  about  how 
to  hike  his  profit.  Consoles  are  eas- 
ily presented  as  the  original  radio 
equipment  of  the  home,  and  they 
give  the  dealer  a  chance  to  drag  out 
all  the   intelligent   arguments. 

Sales  ammunition  for  this  brand 
of  "selling  up"  was  presented  in 
Part    II    of    the    February    issue    of 


Radio  Today;  the  important  argu- 
ments in  favor  of  the  quality  consoles 
were  outlined.  The  material  was 
promptly  picked  up  by  dealers  and 
distributors  all  over  the  country,  and 
the  campaign  to  see  that  every  home 
has  at  least  one  big  receiver  was 
under  way. 

Worth  selling 

"Our  task  is  to  sell  this  idea  to 
dealers  versus  allowing  them  to  take 
the  path  of  least  resistance  permit- 
ting too  many  customers  to  walk  out 
with  a  $10  or  $20  radio,"  was  what 
Parker  II.  Ericksen  of  Fairbanks 
Morse  wrote  to  his  jobber  organiza- 
tions. Mr.  Ericksen's  suggestion  was 
that  dealers  be  encouraged  to  tack 
up  the  Radio  Today  pages  in  sales 
rooms.  He  advised  jobber  salesmen 
to  "show  the  dealer  that  it's  the  kind 
of  conversation  that  he  can  use  to 
improve  his  own  radio  sales." 

"More  consoles  would  be  sold  and 
the  radio  business  as  a  whole  would 
be  on  a  far  more  profitable  basis  if 
more  radio  dealers  would  explain  the 
five  points — (presented  in  the  maga- 
zine under  the  head  'To  Really  En- 
joy Radio  Today — Every  Home  Must 


Have  A  Quality  Console')  (1)  re- 
garding tonal  quality,  (2)  regarding 
speakers,  (3)  regarding  size,  (4)  re- 
garding selectivity  and  sensitivity, 
and  (5)  regarding  reproducing  abil- 
ity," was  the  advice  of  the  Fairbanks 
Morse  executive. 


More  act/on  taken 

Gross  Sales.  Inc.,  New  York  rep- 
resentatives for  Stromberg  Carlson, 
saw  fit  to  blanket  their  dealer  organ- 
ization with  this  story  on  quality 
consoles.  The  suggestion  was  that 
the  pages  be  put  up  in  stores  and 
otherwise  kept  in  mind  during  all 
sales  presentations. 

The  Stromberg  offices  were  also  for 
using  the  material  as  direct  mailing 
pieces,  and  suggested  that  it  would 
form  the  basis  for  lively  feature 
stories  on  local  newspaper  radio 
pages,  if  dealers  would  call  it  to  the 
attention    of    radio    editors    in    their 


Pages  picked  up 

Another  idea  was  that  the  two 
pages  should  be  distributed  at  all 
sales  meetings  for  the  remainder  of 
the  year.  The  theory  was  that  the 
message  should  be  repeated  over  and 
over  again  to  drive  home  the  thought 
that  higher  priced  receivers  can  be 
profitably  promoted  right  in  the 
midst  of  a  trend  toward  lower-priced 
merchandise. 

Dealers  who  were  looking  for  a 
chance  to  talk  about  something  else 
besides  price  were  attracted  by  the 
magazine  display  as  an  attractive 
possibility  for  part  reproduction  in 
local  advertising. 

Others  found  it  effective  to  show 
the  material  to  prospects  personally, 
particularly  in  musical  type  stores, 
and  among  customers  who  are  tone- 
conscious.  In  some  quarters  the  pages 
were  hooked  up  with  serious  musical 
concerts  on  the  networks. 


Hurdling  high  prices 

As  to  whether  the  public  is  greatly 
discouraged  about  high  prices  of  con- 
soles, one  answer  is  found  in  the 
statement  from  Merwin  Lewis,  radio 
man  of  Crofton,  Neb. 

"The  good  radios  are  really  the 
cheapest  to  buy.  They  are  generally 
designed  better,  have  better  parts, 
and  work  better  than  the  others." 

From  Thomas  J.  Wilson,  dealer  in 
New  Athens,  111.,  comes  the  view  that 
"The  public  is  willing  to  pay  for 
something  better  if  educated  cor- 
rectly." 


20 


Radio  Todav 


Jgp 


No.  245-M    Labyrinth, 
Electric    Flash    Tuning 


Right  now  is  the  time  to  pick  the  radio  line 
you  want  for  1938-39.  And  it  is  significant 
that  so  many  dealers  and  distributors  have 
already  signed  up  with  Stromberg-Carlson. 

Each  year,  for  14  years,  Stromberg-Carlson 
has  given  the  trade  fine  merchandise  that 
sold  at  a  real  net  profit.  Each  year  Stromberg- 
Carlson  has  introduced  features  that  set  per- 
formance standards  for  the  whole  industry. 
Each  year  Stromberg-Carlson  has  presented 
new  cabinet  styles  that  set  the  mode  for  all. 

Look  at  the  record.  Total  Shielding  was  a 
Stromberg-Carlson  development.  Remote 
Control  Tuning  was  pioneered  by  Stromberg- 
Carlson  in  1930.  The  Labyrinth,  admitted  by 
all  to  be  the  greatest  tonal  advance  in  radio 
history,  is  an  exclusive  Stromberg-Carlson 
feature.  Electric  Flash  Tuning,  considered 
by  consumer  and  service  man  to  be  the  most 
efficient  tuning  system  on  the  market,  is 
found  only  on  the  new  Stromberg-Carlsons. 

A  new  season  is  coming.  It  will  prove  again 
that  '"There  is  nothing  finer 
than  a  Stromberg-Carlson." 


THE  ACOUSTICAL  LABYRINTH, 
which  no  one  can  duplicate  without 
infringing  many  patents,  does  away 
with  faults  of  ordinary  radio  repro- 
duction. It  gives  tone  which  is  pure 
and    natural  ...  ear -conditioned. 


ELECTRIC  FLASH  TUNING.  Touch 
a  hutton  and  the  station  you  want 
conies  in,  perfectly  tuned,  without  a 
second's  delay.  The  pre-selected  sta- 
tions are  clearly  indicated.  Station 
is  kept  exactly  in  tune  by  the  per- 
fected Automatic  Frequency  Control. 

ROMBERG-CARLSON    TELEPHONE    MFG.    CO.     ROCHESTER,    N.   Y. 


cMweJjwMnq 


a 


risoM 


March,  1938 


21 


Rackets  that  Are  Ruining  Radio  —  VIII 


THE  SERVICE-INSTRUMENT  RACKET 

Inferior  test  equipment  marketed  by  false  claims.  Cheap 
designs   sacrifice    usefulness  in    effort   to    lower    costs 


*  CHEAP,  inferior  test  equip- 
ment which  has  invaded  the  radio 
service  field  represented  as  quality 
merchandise,  is  being  damned  by 
many  servicemen  who  have  written 
Radio  Today  asking  for  an  expose  of 
such  "lousy  practices." 

Not  only  does  the  serviceman  get 
gypped,  but  the  customers  for  whom 
the  radio  man  repairs  sets,  get  gypped 
in  turn.  Either  the  repairs  and  ad- 
justments are  inferior,  or  the  service- 
man must  take  a  longer  time  to  get 
the  set  into  operation.  Resulting  poor 
reception  or  higher  costs,  affects  the 
business  of  the  broadcasters  and  the 
set  manufacturers,  as  well  as  the 
serviceman  and  his  customers.  Re- 
liable, accurate  test  instruments  are 
a  necessity  to  efficient  radio  service. 

Chief  trouble,  it  appears,  lies  with 
the  mail  selling  methods  of  some 
companies.  Grossly  misrepresented 
in  descriptive  literature,  many  unsus- 
pecting servicemen  are  roped  in  and 
buy  this  inferior  equipment.  And 
then  the  hooked  serviceman  finds  that 
he  cannot  get  his  money  back. 

Misrepresentation 

But  even  some  of  the  instruments 
sold  over  the  jobbers'  counters  are 
just  as  bad.  Claims  for  accuracy  in 
many  instances  are  without  founda- 
tion. Instruments  are  described  as 
having  a  "2  per  cent  accurate  meter" 
when  the  multiplier  resistors  are  5 
per  cent,  10  per  cent  or  even  25  per 
cent  off.  Thus  the  serviceman  is  led 
to  believe  that  he  is  getting  a  volt- 
meter that  is  rated  at  2  per  cent 
while  the  error  is  many  times  greater. 

To  be  specific  Radio  Today  has  just 
tested  a  test  oscillator  which  is  di- 
rect-reading from  110  to  22,000. 
Manufacturer  claims  %  per  cent  ac- 
curacy on  I.F.  and  B.C.  bands  and 
2  per  cent  on  the  higher  frequencies. 
Actual  tests  show  inaccuracies  up  to 
6%  on  the  short  waves.  In  addition 
portions  of  two  of  the  bands  are  dead 
in  spots — no  oscillations  whatsoever 
are  produced. 

Then,  too,  this  unit  is  advertised 
as  having  a  variable  audio-frequency 
output — available  direct  or  as  a  mod- 
ulator. Range  is  supposedly  25-10,- 
000  cycles — yet  when  AC  operated  it 
is    impossible    to    get    the   neon-tube 

22 


oscillator  to  produce  more  than  TOO 
cycles.  On  DC  the  neon  oscillator 
will  work  up  to  about  5,000  cycles. 
And  as  might  be  expected,  the  ex- 
planatory printed  matter  does  not 
state  that  the  audio  oscillator  uses 
a  neon  tube  and  produces  saw-tooth 
waveform. 

This  saw-tooth  oscillator  created  so 
much  overmodulation  of  the  R.  F. 
oscillator  that  signals  on  the  weather 
band  of  the  set  were  heard  while  the 
oscillator  was  tuned  from  100  to  350 
KC— set  being  held  at  250  KC. 

The  output  meter  that  is  advertised 
by  the  manufacturer  is  a  minia- 
ture type  neon  lamp.  While  this 
type  unit  may  be  satisfactory  on 
high-voltage  circuits,  it  certainly 
does  not  fulfill  the  definition  of  an 
output  meter.  In  Radio  Today's 
tests,  however,  it  was  impossible  to 
get  sufficient  output  on  a  12-tube  set, 
without  overloading,  to  operate  this 
output  meter. 

Flimsy  construction 

Further  investigation  of  this  test 
oscillator  showed  that  it  was  built  as 
cheaply  as  the  cheapest  midget  radio. 
Oscillator  inductances  were  wound  on 
rough  wood  dowels  and  connected  by 
flexible  wire  to  the  wave  switch. 
Small  wonder  that  the  unit  was  un- 
stable and  changed  frequency  when 
handled. 

The  chassis  supporting  the  "guts" 
was  flimsy  and  bent  under  its  own 
weight.  Certainly  not  the  type  of 
construction  one  expects  in  a  unit 
that  is  relied  upon  as  a  standard. 

The  unit  was  power-line  operated 
on  AC  or  DC — uses  a  6A7  as  a  rec- 
tifier tube  and  another  6A7  triode- 
connected  as  oscillator.  There  was 
no  such  thing  as  a  line  filter.  R.  F. 
energy  fed  into  the  power  line  and 
signal  in  the  radio  set — even  when 
the  oscillator  was  not  connected  to 
the  set — was  many  times  greater  than 
the  local  broadcasting  stations.  In 
no  way  whatsoever,  was  it  possible 
to  attenuate  the  signal  of  the  oscil- 
lator so  that  it  was  less  than  that 
picked  up  from  the  local  stations. 
Alignment  below  AVC  level  was  con- 
sequently  impossible. 

The  output  of  the  oscillator  when 


connected  to  a  12-tube  set  as  directed, 
provided  so  much  signal  that  the  set 
was  immediately  overloaded  even  at 
the  minimum  output  when  the  oscil- 
lator was  tuned  anywhere  near  the 
frequency  to  which  the  set  was  tuned. 
All  sorts  of  unexpected  things  oc- 
curred. The  audio  output  decreased 
when  the  signal  was  tuned  in  to  ex- 
act resonance  due  to  the  overloading. 
Also  the  AVC  voltage  decreased  at 
resonance,  probably  because  of  over- 
loading the  amplifier  tubes.  Even 
with  the  signal  generator  set  for  min- 
imum voltage,  the  receiver  developed 
3  to  4  volts  AVC  bias. 

1 — frequency  AC  voltmeters 

Condenser-type  voltmeter  multi- 
pliers are  used  in  some  AC  volt- 
meters. While  the  voltmeters  can  be 
made  accurate  on  sine  wave  60  cycle 
current  or  any  specific  commercial 
frequency,  on  any  other  frequencies 
the  voltmeter  will  be  in  great  error. 
If  the  serviceman  will  recall  elemen- 
tary electricity,  he  will  remember 
that  the  reactance  of  a  condenser 
varies  with  frequency.  Yet  do  the 
manufacturers  of  this  type  equip- 
ment tell  the  serviceman  that  the  AC 
voltmeter  is  accurate  for  only  60 
cycles  ? 

Some  of  the  set  manufacturers  in 
their  service  data  state  the  volts 
across  the  voice  coil  for  a  given  sig- 
nal input  with  a  test  oscillator  mod- 
ulated at  400  or  1,000  cycles.  A  60 
cycle  voltmeter  therefore  will  indi- 
cate to  the  serviceman  that  something 
is  wrong  in  the  set,  since  it  will  not 
read  the  voltage  specified  in  the  ser- 
vice notes — yet  the  trouble  is  only  in 
the  voltmeter. 

Condenser  type  multipliers  used  on 
a  meter  designed  for  a  single  AC 
frequency  may  have  advantages  over 
the  use  of  resistance  multipliers.  One 
manufacturer  takes  advantage  of  con- 
denser multipliers  to  provide  but  one 
scale  for  both  AC  and  DC  voltage 
measurements.  The  use  of  condenser 
or  reactance  multipliers  for  a  single 
frequency  meter  (power  line  voltage) 
should  not  be  confused  with  practice 
of  using  condenser  multipliers  in  a 
so-called   audio   frequency   voltmeter. 

A  test  oscillator  is  regarded  by  the 
serviceman   as  a  frequency  standard 

Radio  Today 


upon  which  he  can  align  the  trim- 
mers in  a  radio  set,  yet  some  of  these 
oscillators  themselves  use  unstable 
receiver-type  mica  trimmers  so  as  to 
match  the  coils  to  the  dial  calibra- 
tion. Also  high-grade  mica  trimmers 
unless  sealed  are  as  likely  to  get  out 
of  alignment  as  those  in  a  radio 
set,  since  a  signal  generator  receives 
extremely  rough  treatment  in  the 
hands  of  most  servicemen. 

Trimmers  in  test  oscillators 

High-quality  stable  trimmers  in 
oscillators  are  not  to  be  condemned 
since  they  do  not  have  the  shortcom- 
ings of  ordinary  mica  trimmers.  In 
fact  many  high-grade  laboratory  type 
signal  generators  employ  air-trim- 
mer condensers  so  as  to  permit  easy 
re-calibration  of  the  instrument  in 
case  of  drift  or  change  of  tubes. 

Servicemen  can  guard  themselves 
against  poorly  constructed  oscillators 
by  asking  their  jobbers  to  show  them 
the  inside  of  the  unit.  Accuracy  of 
dial  calibration  of  the  oscillator  can 
be  easily  checked  on  the  I.  F.  bands 
by  picking  up  the  harmonics  on  a 
broadcast  receiver  while  zero  beated 
against  a  broadcast  station  of  which 
the  frequency  is  known.  For  in- 
stance the  175  and  350  KC  settings 
produce  4th  and  2nd  harmonics  re- 
spectively at  700  KC,  the  frequency 
of  WLW.  On  the  BO  band  direct 
comparison  with  station  frequencies 
is  possible.  Remember,  though,  that 
a  1  per  cent  oscillator  may  have  a 
10  KC  error  in  calibration  at  1,000 
KC  and  still  be  within  the  rated 
accuracy. 


By  using  a  reference  oscillator  and 
receiver,  short  wave  calibration  can 
be  easily  checked.  The  reference 
oscillator  is  zero-beated  with  a  broad- 
cast station  using  the  set  as  an  au- 
dible indicator  tuned  to  the  BC  sta- 
tion. If  the  BC  station  were  on  1,000 
kilocycles,  harmonics  will  be  pro- 
duced at  multiples  of  1,000,  namely 
2,000,  3,000,  4,000,  etc.,  to  25,000. 
Using  the  receiver,  now  tuned  to  the 
harmonics,  the  oscillator  under  test 
is  then  zero  beated  at  each  of  these 
harmonics  and  the  dial  calibration 
checked.  Starting  at  2  megacycles 
and  counting  the  harmonics,  the  ser- 
viceman can  easily  keep  track  of  the 
harmonics.  Also  the  calibration  of 
the  receiver  dial  can  be  used  as  a 
check — but  do  not  place  too  much  re- 
liance on  the  receiver  dial  calibration. 

Voltmeter  calibration 

Voltmeters  are  easily  checked 
against  one  known  to  be  good.  A 
400  volt  power  supply  with  a  variable 
resistor  will  provide  a  means  of 
checking  the  calibration  over  the 
whole  scale.  Remember  that  2  per 
cent  means  that  the  maximum  error 
does  not  exceed  2  per  cent  of  the  full 
scale  reading.  In  other  words  a  100- 
volt  range  rated  at  2  per  cent  may  be 
off  2  volts  for  any  point  on  the  scale. 
A  2  volt  deviation  at  25  volts  is  al- 
lowable, even  though  it  is  8  per  cent 
of  25.  When  comparing  the  calibra- 
tion of  volt  and  milliammeters,  they 
should  be  both  connected  in  the  cir- 
cuit at  the  same  time.  (Remember 
that  both  meters  may  be  in  error — ■ 
one  plus,  the  other  minus,  so  that  the 


apparent  error  may  be  as  much  as 
twice  the  actual.) 

Milliammeters  are  checked  similar- 
ly, but  the  units  are  placed  in  series 
instead  of  in  parallel  as  were  the 
voltmeters. 

Ohmmeters  can  be  checked  against 
one  known  to  be  good.  Different  re- 
sistors are  measured  on  the  accurate 
instrument  and  a  comparison  made 
of  the  reading  when  the  resistors  are 
measured  on  the  instrument  being 
checked.  Or  if  available,  precision 
resistors  (1  per  cent)  of  known  value 
may  be  used  to  check  the  ohmmeter. 

Low -impedance  tube 
voltmeters 

Even  though  vacuum  tube  volt- 
meters are  supposed  to  be  capable  of 
measurements  at  radio  frequencies, 
some  of  the  units  are  almost  useless. 
High-capacity  voltmeter  leads  detune 
tuned  circuits,  low  input  impedance  of 
the  unit,  reduces  the  voltage  to  a  po'ybt 
where  measurement  of  it  is  meaning- 
less. A  quick  check  on  the  amount 
of  detuning  caused  by  a  vacuum  tube 
voltmeter  can  be  easily  checked  by 
attaching  the  unit  across  the  grid  of 
an  I.  F.  or  R.  F.  amplifier  and  not- 
ing the  amount  the  AVC  voltage 
changes  by  watching  the  cathode  ray 
tuning  indicator.  The  greater  the 
change  in  the  AVC  voltage,  the 
poorer  the  unit  is. 

As  a  DC  instrument  the  capacity 
in  the  leads  of  a  vacuum  tube  volt- 
meter is  inconsequential.  However, 
some  units  have  a  resistor  connected 
across  the  grid  to  the  cathode.  Con- 
( Continued    on   page    60) 


A  few  of  the  bad  practices  found  in  some  of  the  cheap  all-wave  oscillators. 


OLD  TWO-GANG  RECEIVER 
CONDENSER,  ONLY    ONE 
SECTION  USED. 


COIL  SUPPORTED  AT  ONE 
END  BY  FINE  WIRE. 


THIN  METAL 
USED  IN  CHASSIS, 
PANEL  a  CABINET. 


r,    DIAL  8 
ESCUTCHEONS. 


NON-RIGID  LEAPS 
FlfoM  COILS  TO 
SWITCH  a  TUBE 


UNSHIELDED 
HIGH  FREQUENCY 
COILS  WOUND  ON 
WOODEN  DOWELS 


NON-RIGID,  THIN 
FIBER  STRIP 
HOLDING  LOW 
FREQUENCY  COILS. 
SUPPORTED  BY 
SINGLE  SPADE  BOLT. 


OLO  TYPE  RECEIVER 
SWITCH,  ONLY  HALF  OF 
THE  TERMINALS  USED. 


NEON  TUBE  AUDIO 
OSCILLATOR  GIVING 
SAW-TOOTH  WAVE  FORM. 


NEW  THINGS 

Latest   news   of  radio   products   from    the   manufacturers 


Heavy-duty    resistors 

*  Heavy-duty  resistors  with  an 
improved  coating.  Superior  opera- 
tion under  abnormal  atmospheric 
conditions.  100  per  cent  greater 
life  on  accelerated  salt  solution  im- 
mersion tests.  New  coating  known 
as  type  C.  Standard  units  still 
available  with  type  A  coating.  In- 
ternational Resistance  Co.,  401  N. 
Broad  St.,  Philadelphia,  Pa. — Ra- 
dio Today — see  also  advt.  p.  41. 


Low-loss  switches 

*  Complete  line  of  selector 
switches  with  Isolantite  insulator. 
Operate  with  DC  potentials  up  to 
1000  volts.  Contacts  will  operate  in 
transmittings  rated  up  to  100  watts. 
Switches  designed  for  use  in  ama- 
teur radio  transmitters  and  in  re- 
ceivers where  extremely  low-losses 
are  desirable.  Centralab,  900  E. 
Keefe  Ave.,  Milwaukee,  Wis. — Ra- 
dio Today — see  also  advt.  p.  52. 


AC  operated  test  oscillator 

*  All-wave  signal  generator  with 
fundamental  output  from  100-30,000 
KC.  in  6  bands.  Scale  length  over 
50  inches — accuracy  of  calibration 
2  per  cent.    High  R.F.  output  of  1 


volt.  Minimum  signal  of  2  micro- 
volts. Internal  500  cycle  oscillator 
for  modulation  and  A.F.  output  of 
8  volts.  Jacks  for  frequency  modu- 
lator and  external  A.F.  modulator. 
Model  153— net  $29.95.  RCA  Mfg. 
Co.,  Cooper  St.,  Camden,  N.  J. — 
Radio  Today. 


Police  auto  radio  converter 

•  Short-wave  converter  for  use 
with  standard  'auto  radio.  Permits 
reception  of  police  and  other  sig- 
nals from  1500-2500  KC.  Uses  2 
metal  tubes  and  has  r.f.  amplifier 
stage.  High  sensitivity  and  quiet 
operation.  ABC  Radio  Labs.,  3334 
N.  New  Jersey  St.,  Indianapolis,  Ind. 
— Radio  Today — see  also  advt.  p   55. 


Arvin  P.B.  auto  radio 

*  5-tube  auto  radio  with  6-sta- 
tion  direct  control  board  push-but- 
ton automatic  tuning.  Station  vari- 
ator  control  knob  increases  tuning 
range  of  set  so  that  it  is  possible  to 
get  2  additional  stations  on  either 
side  of  each  push-button  setting.  Also 
compensates  for  climatic  conditions. 
Model  6— list  $24.95. 

Push-button  mechanism  (electric) 
for  models  22A,  32,  42  selecting  6 
stations.  Used  with  regular  dial 
control.  List  $17.95.  Noblitt-Sparks 
Industries,  Columbus,  Ind. — Radio 
Today- — see  also  advt.   p.   31. 


Meissner  signal  shifter 

*  Electron  -  coupled  oscillator 
and  amplifier-doubler  for  providing 
variable  frequency  excitation  for 
amateur  transmitters.  Ganged  con- 
denser provides  accurate  tracking 
over  whole  band.  For  operation  on 
10,  20,  40,  80,  160  meter  bands.  Ver- 
nier type  dial  for  accurate  calibra- 
tion. Frequency  unaffected  by  load- 
ing. Meissner  Mfg.  Co.,  7th  &  Bel- 
mont, Mt.  Carmel,  111. — Radio  To- 
pay. 


Oil  burner  ignition  suppressors 

•k  Suppressor  resistors  for  use 
with  oil  burners.  Confines  the  radi- 
ation from  the  ignition  system  to  a 
radius  of  a  few  inches  around  the 
oil  burner.  Made  in  2  types.  OB12 
is  a  carbon  resistor  with  brass  caps 
receiving  wires  up  to  Vs  inch  diam- 
eter. OB14  is  a  14,000  ohm  wire 
wound  unit  designed  for  mounting 
on  the  transformer  terminal.  List 
$1.  Continental  Carbon,  Inc.,  13900 
Lorain  Ave.,  Cleveland,  Ohio — Radio 
Today- — see  also  advt.  p.   45. 


Midget  radio  controls 

-*•  Compact  composition-type  vol- 
ume controls  with  taps  for  tone 
compensation  and  units  for  auto 
radios.  Tapped  controls  have  ad-a- 
switch  feature — will  match  any  ex- 
isting circuit  requirement.  Auto 
controls  will  service  approximately 
95  per  cent  of  such  receivers  — 
switch  can  also  be  added.  Clarostat 
Mfg.  Co.,  Inc.,  287  N.  6th  St., 
Brooklyn,  N.  Y. — Radio  Today. 


24 


Radio  Today 


School  sound  system 

*  Sound  system  designed  for 
use  in  small  schools.  Will  handle 
up  to  16  rooms,  All-wave  radio 
tuner,  master  call  and  return 
speech.  P.M.  speakers  with  wall 
mounting  baffles.  Compact  and  low 
in  cost.  Model  JS-118.  Webster- 
Chicago,  5622  Bloomingdale  Ave., 
Chicago,  111. — Radio  Today — see  also 
advt.  p.  37. 


Oscillograph  wobbulator 

■*■  Oscillograph  and  frequency 
modulator  using  2-inch  tube.  Scope 
has  10-45,000  cycle  sweep  and  pat- 
tern locking  control.  Wobbulator 
employs  an  oscillator  operating  at 
840  KC.  synchronized  to  linear 
sweep  circuit.  Model  77-2.  Triumph 
Mfg.  Co.,  1417  W.  Lake  St.,  Chicago, 
111. — Radio  Today. 


Short-wave  receiver  kit 

+  All-wave  receiver  tuning  540- 
22,000  KC.  Tuner  unit  (illustrated) 
is  wired,  aligned,  and  tracked  at 
factory  and  requires  practically  no 
adjustments  when  incorporated  into 
receiver.  Set  has  phase  inversion 
in  audio  system,  band-pass  link- 
circuit  I.F.  transformers.  Browning 
83.  Browning  Labs.,  Inc.,  750  Main 
St.,  Winchester,  Mass. — Radio  To- 
day. 


Silver-plated   mica   condenser 

*  Mica  capacitor  designed  es- 
pecially for  push  button  tuning. 
Capacity  tolerance  within  3  per 
cent,  extremely  high  "Q"  and  ex- 
cellent retrace.  Temperature  co- 
efficient of  plus  .003/degree  Centi- 
grade. 100  volts  DC  test.  Range  10 
to  1100  mmfd.  Encased  in  low-loss 
bakelite.  Type  2R.  Cornell-Dubilier 
Corp.,  S.  Plainfield,  N.  J.— Radio 
Today — see  also  advt.  p.  4. 


Tandem  rheostat  assembly 

■*•  High  -  wattage  tandem  rheo- 
stats for  circuits  requiring  simul-- 
taneous  variation  of  more  than  1 
control.  Universal  couplings  be- 
tween units  eliminate  lost  motion 
and  permit  easy  positive  operation. 
This  special  construction  available 
for  300,  500,  1000  watt  units.  Stand- 
ard tandem  assemblies  available  for 
25-watt  and  larger  units.  Ohmite 
Mfg.  Co.,  4835  Flournoy  St.,  Chi- 
cago, 111. — Radio  Today — see  also 
advt.  p.  55. 


True-fidelity  receiver  kit 

■*  Band-pass  tuned  radio  fre- 
quency receiver  kit  designed  for 
high  quality  reception  of  strong 
broadcast  signals.  Kit  includes  all 
coils,  variable  condenser,  dials,  and 
chassis  and  panel.  Uses  standard 
transformers,  condensers,  etc.  Avail- 
able as  a  tuner  unit  or  a  complete 
receiver  with  push-pull  2A3  output 
tubes.  Bulletin  describing  receiver 
may  be  had  upon  request.  List  for 
coils  and  variable  condenser  $15. 
J.  W.  Miller  Co.,  5917  S.  Main  St., 
Los  Angeles,  Calif. — Radio  Today'. 


Vibrapowr  auto  vibrators 

*  Complete  line  of  replacement 
auto  vibrators.  Operates  and  starts 
on  voltages  from  3  to  8.  Lower  coil 
drain  gives  higher  efficiency.  Armco 
iron  pole  piece.  Tungsten  contacts. 
Bakelite  and  mica  insulation.  Cad- 
mium plated  to  prevent  rust. 
Moulded  rubber  jacket  sound  proofs 
unit.  Pauley-James  Corp.,  4619 
Ravenswood  Ave.,  Chicago,  111. — 
Radio  Today. 


Franklin  mechanical  P.B.  tuner 

*  Mechanical  type  of  push  but- 
ton tuner  using  no  motor.  Compact 
unit  consists  of  sturdy  frame 
mounting  six  or  more  stations  se- 
lector buttons  with  a  corresponding 
number  of  cams  on  a  common  drive 
shaft.  Cable  drive  transmits  cam 
shaft  action  to  variable  condenser. 
Positive  action  assures  permanent 
accuracy.  Complete  information  will 
be  sent  to  radio  set  manufacturers 
upon  request.  A.  W.  Franklin  Mfg., 
175  Varick  St.,  New  York,  N.  Y.— 
Radio  Today. 


Electro-Voice  microphone 

*  Double-button  carbon  micro- 
phone with  internal  shock  absorber. 
Extremely  low  noise  level.  Combi- 
nation locking  stand  and  cable  con- 
nector. Button  current  3  to  20  mils. 
Black  and  chromium  finish.  Model 
100.  Electro-Voice  Mfg.  Co.,  338  E. 
Colfax  Ave.,  South  Bend,  Ind. — 
Radio  Today. 


Wincharger  lighting  kit 

*  6-volt  farm  lighting  outfit. 
Consists  of  a  heavy-duty  storage 
battery,  wire,  six  electric  lights, 
2  wall  outlets,  table  lamp,  and  de- 
luxe Wincharger.  Low  cost  of  out- 
fit permits  sale  to  average  farmer. 
Operating  cost  is  50  cents  a  year. 
Wincharger  Corp.,  Sioux  City,  Iowa 
— Radio  Today. 


March,  1938 


25 


MORE  NEW  THINGS 


Thordarson  amplifiers 

*  Modernly  styled  amplifiers 
housed  in  walnut  case  with  outputs 
from  8  to  60  watts.  Controls  pro- 
tected by  door  with  window — con- 
trols illuminated  and  easily  seen. 
Units  feature  dual  tone  controls, 
inverse  feedback,  universal  output 
impedances,  and  field  supply  cur- 
rent. Model  T-20W25  with  25-watt 
output— list  $121.85  with  tubes.  Flat 
response  within  1  DB  from  35  to  15,- 
000  cycles.  Amplifier  Div.,  Thordar- 
son Electric  Mfg.  Co.,  500  W.  Huron 
St.,  Chicago,  111. — Radio  Today — see 
also  advt.  p.  49. 


Minicap  tubular  condensers 

*  Dry  electrolytic  condensers  of 
extremely  small  dimensions.  Her- 
metically sealed  in  metal  cans. 
Available  in  single-section  types 
only — to  avoid  interaction  between 
units.  Available  in  23  different 
stock  sizes  at  100,  150,  300,  450 
volt  ratings.  Solar  Mfg.  Corp.,  599 
Broadway,  New  York,  N.  Y. — Radio 
Today — see  also  advt.  p.  63. 


Crystal    and    dynamic    mikes 

•  Crystal  type  mike  (left)  with 
semi-directional  characteristics.  Ca- 
ble plug  at  base  of  unit.  Model  B9 
with  8-inch  cable — list  $22.50. 

Type  D7T  is  an  extremely  small 
high  -  impedance  dynamic  micro- 
phone with  output  level  of  minus 
55  DB.  Also  available  in  low  im- 
pedance as  model  D7.  ly  inch 
diameter.  Weigh  only  %y2  ounces. 
Complete  with  \2y2  foot  cable  with 
plug.  List  $22.50.  American  Micro- 
phone Co.,  1915  S.  Western  Ave., 
Los  Angeles,  Calif. — Radio  Today — 
see  also  advt.  p.  54. 


DC  sound  amplifier 

+  10-watt  amplifier  kit  using 
25L6  tubes  for  DC  operation.  Gain 
of  139  DB  makes  it  possible  to  use 
any  type  of  microphone.  Described 
In  bulletin  PA-15.  Kit  includes 
transformers  and  chassis.  Jefferson 
Electric  Co.,  Bellwood,  111. — Radio 
Today. 


&  % 


Lectrohm   resistors 

*  Wire-wound  vitrous  enameled 
resistors  in  sizes  from  5  to  200 
watts.  Space  -  wound  on  low-loss 
ceramic  forms  with  wire  having 
low-temperature  coefficient.  Toler- 
ances can  be  held  as  close  as  1  per 
cent.  Available  in  fixed,  tapped, 
adjustable  types  with  pig-tail  or 
soldering  lug  terminals.  5-watt 
unit  measures  5/16  diameter  by  1 
inch.  200-watt  unit  is  ly  diameter 
by  12  inches.  Lectrohm,  Inc.,  5133 
W.  25th  Place,  Cicero,  111.— Radio 
Today. 


Communi-Call  interphone 

*  Wired -type  of  loudspeaking 
intercommunicating  systems.  2-sta- 
tion  unit  illustrated.  Operates  on 
AC  or  DC.  Equipped  with  50  feet 
of  interconnecting  cable.  Volume 
control  and  talk  switch  on  master 
unit.  Model  100 — list  $25  complete. 
Multiple  station  systems  also  avail- 
able. Chicago  Sound  Systems  Co., 
160  E.  Illinois  St.,  Chicago,  111.— 
Radio  Today. 


Headphone  kit 

*  Kit  for  making  possible  the 
use  of  headphones  with  all  recent 
Stromberg-Carlson  sets.  Kit  in- 
cludes matching  transformer,  vol- 
ume control,  headphones,  plug  and 
jack.  Stromberg-Carlson  Telephone 
Mfg.  Co.,  100  Carlson  Rd.,  Roches- 
ter, N.  Y. — Radio  Today. 


RCA  table  type  receivers 

•  4-tube  AC-DC  tuned  R.F.  set 
covering  530-1800  KC.  Clock  type 
dial — metal  tubes.  \y2  watts  out- 
put— dynamic  speaker.  Walnut-fin- 
ished cabinet — 8yx&ygx5}%  inches. 
Model  94-X— list  $14.95. 


7-tube  dual-band  superhet  tuning 
530-1720,  2300-22,000  KC.  Straight- 
line  dial — magic  eye  tuning  indica- 
tor. Power  output  of  4  watts.  20-:  1 
vernier  dial.  Variable  tone  control. 
Automatic  tone  compensation.  Iron- 
core  I.F.  transformers.  Model 
87-T-l— list  $49.95.  RCA  Mfg.  Co., 
Front  and  Cooper  Sts.,  Camden,  N. 
J. — Radio  Today — see  also  advt.  p.  2. 


Amperite  compact  mike 

*  Velocity  microphone  featuring 
small  size.  Size  of  head  is  only 
iy  x  2%  x  1%  inches.  Frequency 
response  with  2  DB  from  60-7500 
cycles.  Complete  with  output  trans- 
former, cable  connector  and  switch. 
Output  level  minus  70  DB  (open 
line).  Case  of  molded  rubber  with 
chrome  trim.  High-impedance  mod- 
el ACH,  low-impedance  model  ACL 
— list  $25  with  25-foot  cable.  Am- 
perite Co.,  561  Broadway,  New 
York,  N.  Y. — Radio  Today — see  also 
advt.  p.  35. 


26 


Radio  Today 


WWLmmn 

niiTORBPtPl 


WITH  THE 


BEL-MONITOR 

NO  TRIMMERS-KEYS  ADJUSTED  BY 
THE  AUTO  OWNER  WITHOUT  TOOLS! 

Exclusive  features  make  these  new  auto  radios  the  most  saleable  the  country  has  ever  seen. 
Imagine  six-station  automatic  tuning  that  anyone  can  adjust  in  three  minutes  without 
tools!  And  the  visual  dial  changes  with  the  key. 

And  they  are  beautiful— Model  677,  the  6-tube  de  luxe  model  (mounted  with  one  bolt,  by 
the  way)  is  finished  in  color  with  the  tuner  in  grained  walnut.  Contains  8  tuned  circuits, 
a  beam-power  tube,  and  an  8-inch  dynamic  speaker.  No  mechanical  connections  between 
the  two  units  —  and  only  one  cable  for  electrical  connections.  No  tubes  in  tuning  head. 

Model  577  is  a  5-tube  one  unit  model  with  every  sales  feature  you  ever  heard  of — 
including  BEL-MONITOR  automatic  tuning. 

Like  all  BELMONT  receivers  they  are  PRICED  TO  SELL! 

If  you  intend  to  do  an  auto-set  business  this  Spring,  write  the  factory  for  full  details/ 


BELMO 


\ADlO  CORPORATION 


General  Offices:  12S7  Fullertoo  Ave,,  Chicago 


MORE   NEW   THINGS 


Record  player 

•  Attachment  for  playing  rec- 
ords through  radio  set  or  an  ampli- 
fier. High  -  impedance  magnetic 
pick-up.  Self-starting  synchronus 
motor.  8-inch  turntable  accommo- 
dating 10  and  12-inch  records.  Op- 
erates on  110  AC,  60  cycles  only. 
Solid  walnut  cabinet.  Model  PB 
Jr. — list  $19.95.  Sonora  Electric 
Phonograph  Corp.,  132  W.  22nd  St., 
New   York,   N.   Y. — Radio   Today. 


Miracle  tuning  Emerson 

*  5-tube  AC  operated  superhet 
with  push-button  tuning  for  6  sta- 
tions. Push  buttons  easily  set  up 
from  the  front.  6^4-inch  speaker — 
automatic  volume  control.  Output 
of  3  watts.  Model  BE-198  in  wal- 
nut bakelite  cabinet — list  $19.95.  In 
ivory — list  $25.95.  Emerson  Radio 
&  Phonograph  Corp.,  Ill  Eighth 
Ave.,  New  York,  N.  Y. — Radio 
Today. 


Yaxley  switch 

*  Multiple  push-button  switch 
for  interphones,  push-button  tuners, 
telephone  systems,  frequency  selec- 
tors, set  analyzers,  tube  checkers, 
meter  switching,  etc.  Silver-plated 
contacts.      Sliding,    wiping    contact 


motion.  Pushing  any  button  auto- 
matically releases  the  button  which 
has  previously  been  depressed.  One 
type  designed  for  circuit  closing 
operations,  other  for  circuit  trans- 
fers. P.  R.  Mallory  &  Co.,  Ind.,  In- 
dianapolis, Ind. — Radio  Today — see 
also  advt.  p.   1. 


<£ 


Irwin  8  mm  projector 

*  AC-DC  type  movie  projector 
for  8  mm  film.  Single  film  feed 
sprocket  which  maintains  proper 
loops  at  all  times.  All  controls  on 
one  side.  Solid  cast  construction. 
Fan  type  shutter,  200  foot  capacity. 
Forced  draft  ventilation.  Hi-speed 
motor  re-wind.  Tilting  device — 
quick  framing  device.  Finished  in 
brown  and  chromium.  Zephyr  8 — 
list  $18.95.  Irwin  Corp.,  27  W.  20th 
St.,  New  York,  N.  Y. — Radio  Today. 


High-gain  amplifier 

+  18-watt  power  amplifier  with 
electronic  bass  and  treble  tone  con- 
trols. 2  mike  input  channels  and 
2  phono  inputs.  Tapped  output 
transformer.  High  impedance  mike 
input.  Peak  output  of  25  watts. 
Model  CX-18— list  $72.50  less  tubes. 
David  Bogen  Co.,  663  Broadway, 
New  York,  N.  Y. — Radio  Today — 
see  also  advt.  p.  59. 


Electric  shaver  filter 

■*  Noise-eliminating  filter  to  be 
used  with  electric  shavers.  Filter 
unit  simply  plugs  into  the  power 
line  and  the  shaver  plugs  into  the 
filter.  Philco  Radio  &  Television 
Corp.,  Tioga  &  C  Sts.,  Philadelphia, 
Pa. — Radio  Today. 


Col-Mar  auto  aerial 

*  Telescoping  type  auto  an- 
tenna that  drops  out  of  sight  when 
not  used.  Vacuum  suction  raises 
and  lowers  the  rod.  Circle  inset 
shows  appearance  when  aerial  is 
not  in  use.  .  .  Just  touch  a  button 
and  up  it  goes.  Requires  only  short 
lead-in  to  radio.  Brass  alloy  rod 
chrome  plated.  Bakelite  insulation. 
Pioneer  Specialty  Co.,  521  St.  Jean 
Ave.,   Detroit,  Mich. — Radio  Today. 


Zenith  radio  nurse 


*  Carrier-type  one-way  commu- 
nication device.  Guardian  ear  is 
placed  in  room  from  which  recep- 
tion is  desired.  Device  merely 
plugged  into  electric  outlet — no  con- 
necting wires.  Voice  unit  plugged 
into  power  line  picks  up  all  sounds 
in  the  room  with  the  ear  unit.  Ear 
and  voice  units  may  be  moved 
around  as  desired  and  will  operate 
anywhere  in  the  home.  List  per 
pair— $29.95.  Zenith  Radio  Corp., 
6001  Dickens  Ave.,  Chicago,  111  — 
Radio  Today. 


Electric  phonograph 

■*  AC  operated  electric  phono- 
graph with  6-watt  amplifier.  High- 
fidelity  crystal  pick-up.  Push-pull 
output  tubes  —  dynamic  speaker. 
Constant-speed  motor.  Plays  10  and 
12-inch  records.  Tone  compensa- 
tion circuit.  Walnut  cabinet.  Rani- 
co  model  106— list  $75.  Regal  Am- 
plifier Mfg.  Corp.,  14  W.  17th  St., 
New  York,  N.  Y. — Radio  Today — 
see  also  advt.  p.  56. 


28 


Radio  Today 


METAL7UBES?- 

THEy/MAKEA 

MD\oAf0DER/V/ 


Yes-and  CUNNINGHAM  METAL  TUBES  are  the 

service  man's  special— designed,  engineered  and 

manufactured  expressly  for  him! 

Metal  Tubes  offer  EXTRA  advantages.  Some  of  these 
"extras"  include: 

1 .  The  elimination  of  noises  arising  from 
external  tube  shielding — and  you  can 
prove  this  with  a  demonstration. 

2.  They  assure  better  performance  because 
of  perfect  self  shielding. 

3.  Sturdier  construction  that  makes  them 
"vibration  proof." 

4.  They're  easier  to  change. 

Besides,  Metal  Tubes  offer  many  other  proofs  of  merit 
— all  summed  up  in  this  statement:  They  make  a 
radio  modern  because  they  give  modern  performance. 


Over 90,000,000  Cunningham  Radio  Tubes 
have  been  sold  for  replacement  service  work. 

A  PRODUCT  OF  THE  RCA  MANUFACTURING  COMPANY 


?*ee/  $500.00  worth 
of  RCA  Test  Equipment 

For  full  details  and  entry  blanks,  see 
the  March  issue  of  RCA  Radio  Service 
News... a  local  Cunningham  distrib- 
utor ...  or  write  to  the  "Moderni- 
zation Contest  Editor,"  RCA  Manu- 
facturing Co.,  Inc.,  Camden,  N.J. 


# 


March,  1938 


29 


MORE  NEW  THINGS 


Radiart  auto  antennas 

*  Complete  line  of  auto  an- 
tennas made  of  non-rusting  mate- 
rial with  durable  plating.  High 
quality  insulation  and  lead-ins. 
Zephyr  type  R7  illustrated  at  top — 
list  $3.95.  Speedline  type  R5  at 
bottom  lists  for  $4.95.  Radiart 
Corp.,  Cleveland,  Ohio — Radio  To- 
day.— see  also  advt.  p.  50. 


Motor  capacitor  replacements 

*  Complete  line  of  capacitors  for 
motor  starting,  consisting  of  106 
units,  of  which  only  22  are  required 
to  serve  90  per  cent  of  the  field  ap- 
plications. Nine  universal  replace- 
ments may  be  used  in  a  wide  varity 
of  application,  although  they  do  not 
duplicate  the  physical  appearance. 
P.  R.  Mallory  &  Co.,  Indianapolis, 
Ind. — Radio  Today — see  also  advt. 
p.  1. 


Antenna-power  extension 

*  Flat  woven  cable  for  antenna 
and  power  connections.  Provides 
neat  connection  to  chairside  type 
radios.  Five  wires  used — two  for 
power,  two  for  antenna,  and  one 
for  ground  connection.  Plugs  into 
standard  power  receptacle — antenna 


connections  on  face  of  plug.  Avail- 
able in  7,  10,  14  foot  lengths.  10 
foot  cord  code  510WFCA — list  $3. 
Alden  Products  Co.,  715  Center  St., 
Brockton,  Mass. — Radio  Today. 


Trumpet  speaker 

*  Air  column  speaker  with  in- 
ternal folding  to  save  space.  Equiv- 
alent to  a  3V^-foot  exponential 
horned — length  reduce  to  less  than 
one  half.  P.M.  dynamic  unit  capa- 
ble of  handling  25  watts.  Horn 
made  of  aluminum  and  weighs  4 
pounds  exclusive  of  speaker  unit. 
University  Labs.,  191  Canal  St., 
New  York,  N.  Y. — Radio  Today. 


Radio  chair 

*  Stuffed  chair  or  sofa  with 
radio  set  built  into  the  arm.  Hinged 
lid  covers  set  when  not  in  use. 
Standard  table  type  radio  set  fits 
into  special  compartment.  Diamond 
Parlor  Furniture  Co.,  76  Traverse 
St.,  Boston,  Mass. — Radio  Today. 


Telegraph  recorder 

*  Tape  type  recorder  for  code 
signals.  Operates  at  speeds  up  to 
200  words  per  minute.  Band  pass 
filter  for  recording  through  inter- 
ference^— low  pass  filter  for  weak 
signals  when  noise  level  is  high. 
Housed  in  crackle  finished  alumi- 
num cabinet.  Universal  Signal  Ap- 
pliances, 64  W.  22nd  St.,  New  York, 
N.  Y.— Radio  Today. 


Mycalex  insulation 

*  Radio  parts  using  leadless 
Mycalex  for  insulation.  Available  in 
all  sizes  and  shapes  for  high  fre- 
quency equipment.  Illustrated  is  a 
tube  socket  using  Mycalex.  Light 
weight  especially  desirable  in  air- 
craft equipment.  High  mechanical 
strength.  Withstand  high  voltages 
and  not  damaged  by  temporary  flash 
overs.  Can  be  machined  and  held 
to  same  tolerances  as  metal.  Elec- 
tronic Mechanics,  Inc.,  201  E.  12th 
St.,  New  York,  N.  Y. — Radio  Today. 


Grebe  T.R.F.  set 

*  5-tube  AC-DC  tuned  radio 
frequency  table  radio.  Beam  power 
output  tubes.  Tunes  broadcast 
band.  Special  model  available  with 
835-2,050  meter  band.  Comes  in 
black,  ivory,  walnut,  green  and  red. 
Challenger  5.  Grebe  Mfg.  Co.,  119 
Fourth  Ave.,  New  York,  N.  Y. — 
Radio  Today. 


Television  components 

*■  Complete  line  of  transformers 
and  deflecting  yokes  for  cathode  ray 
television.  Magnetic  deflection  yoke 
available  constructed  to  provide 
maximum  amplitude  and  minimum 
defocussing  control.  Transformer 
coupled  to  amplifier  tubes.  Type 
T700  yoke  illustrated— list  $12. 
Kenyon  Transformer  Co.,  Inc.,  840 
Barry  St.,  New  York,  N.  Y. — Radio 
Today. 


30 


Radio  Today 


SIX-STATION  DIRECT 
CONTROL  BOARD 
WITH  AUTOMATIC 

PUSH-BUTTON  TUNING 


STATION 

VARIATOR 

EXPANDS  TUN 

RANGE 

A  slight  turn  of  tb/^knob,  to  left 
or  right,  gets^wo  to  four  addi- 
tional statists  at  each  push-but- 
ton satffng,  when  driving  within 
receiving  range. 

Example:  automatic  setting,  WLW, 
700  kc.  Turn  left:  WOR,  710  kc; 
WGN,  720  kc.  Turn  right:  CFRB, 
690  kc;  WPTF,  680  kc. 


Eyes  Off  Road... It's 
All  Tuned  by  Touch 


Just  push  a  button  and  tune  in 
any  one  of  6  favorite  stations 
automatically . . . 

Station  settings  are  easy  to  make  or 
change  for  any  locality.  Simply  remove 
front  panel  plate  and  set  condenser 
screws  for  peak  reception  of  stations. 


•  This  new  Arvin  Model  6  is  a  powerful  car  radio  with  5  tubes  that  do  the 
work  of  7.  It  has  exceptional  station-getting  ability  and  fine  selectivity.  In  fact, 
its  all-over  performance  is  equal  to  or  better  than  many  higher-priced  sets 
with  an  extra  tube  and  dial  tuning.  This  is  all  due  to  the  Arvin  fixed  condenser 
circuit  which  permits  each  push-button  setting  to  be  balanced  perfectly  for 
maximum  station  reception.  Dynamic  speaker  in  specially  designed  radio 
case  provides  fine  tone  quality.  Sloping  direct  control  board  is  at  convenient 
angle  under  instrument  panel.  Easy  installation  in  car.  Special  aerial,  $2.50  list. 
Order  from  your  jobber.  Noblitt-Sparks  Industries,  Inc.,  Columbus,  Indiana. 


THE   CONVENIENCE  AND   SAFETY  OF  PUSH-BUTTON   TUNING   PLUS 
THE    FLEXIBILITY   OF    DIAL    TUNING  ...  ALL    DONE    BY   TOUCH 


March,  1938 


31 


imflBl 


Here  is  the  "Guardian  Ear"  unit  of  Zenith's  new  wireless  "Radio  Nurse."  Plugged 
into  the  nearest  outlet,  it  reports  everything  to  "voice"  unit  in  another  room. 

INTER-PHONES  AND  RADIO 

A  Team  for  Spring  Merchandising 


*  THE  March-April  season  finds 
radio  and  intercommunication  nicely 
paired  for  dealer  promotion. 

The  public  has  had  time  to  identify 
the  radio  store  as  the  sales  and  ser- 
vice headquarters  for  the  inter- 
phones. Manufacturers  of  the  'phones 
have  branched  into  many  fields — 
from  the  nursery  to  industrial  plants, 
and  have  spent  millions  of  dollars  to 
present  this  equipment  as  "popular 
communication"  having  a  vital  place 
in  modern  life.  The  device  is  pretty 
well  established  as  a  necessity  in  of- 
fices, stores,  factories,  hotels,  hospi- 
tals, schools  and  in  private  homes. 

Recently  the  inter-phones  have 
been  advertised  and  demonstrated  on 
national  networks  and  have  appeared 
widely  in  popular  magazines.  This 
promotion  has  accented  .the  use  of 
the  systems  in  homes,  and  therefore 
has   a  terrific  effect  on  the  industry. 

Prospects  convinced 

After  all,  office  workers,  industrial 
employees,  all  persons  involved  in  any 
type  of  business  live  in  homes.  And 
if  in  these  homes  they  get  an  intro- 
duction to  the  simpler  types  of  inter- 
phones, they  will  see  the  possible  ap- 
plications in  their  various  lines  of 
business.  Thus  all  income  levels  will 
be  blanketed  with  an  understanding 
of  the  value  and  the  need  of  such 
communication. 


All  this  took  place  just  as  the 
warmer  months  began  to  arrive,  so 
that  outside  sales  work  can  flourish 
all  over  again.  Leg-work  becomes 
pleasant   and  profitable. 

Lease  ownership  plan 

The  Radiofone  company  has  intro- 
duced a  plan  which  permits  the 
dealer's  representative  "to  sell  equip- 
ment on  the  same  basis  as  a  telephone 
installation,  water  cooler  installation, 
or  air-conditioning  installation  there- 
by increasing  the  number  of  calls  in 
a  working  day."  The  company  now 
suggests  that  an  ordinary  salesman 
may  now  call  upon  a  prospect  with 
only  a  circular  and  a  form  of  lease 
ownership  contract.  Radiofone  took 
this  step  because,  where  the  actual 
equipment  was  carried  along  and  a 
demonstration  staged,  it  was  neces- 
sary to  employ  extremely  high-sal- 
aried salesmen. 

This  company  explains  that  "the 
prospect  should  be  approached  on  the 
basis  of  his  need  for  intercommuni- 
cation service  and  the  offer  to  in- 
stall Radiofone  equipment  on  a  lease 
ownership  basis  will  not  meet  any  re- 
sistance. It  should  be  pointed  out 
that,  unlike  the  rental  of  telephones, 
etc.,  the  amount  of  money  paid 
monthly  on  the  lease  basis  applies 
toward  complete  ownership  by  the 
customer    after    a    20-month    period 


The  customer,  if  he  so  desires,  has 
the  privilege  of  purchasing  the 
equipment  at  any  time  during  the 
20-month  period,  at  prices  fixed  by 
you  to  meet  varying  conditions." 

Radio  nurse 

With  the  introduction  of  its  one- 
way communication  device  known  as 
the  "Radio  Nurse"  the  Zenith  com- 
pany goes  to  town  with  the  idea  of 
safety  and  convenience  in  homes 
where  children  or  invalids  need  a 
simple  and  dependable  and  portable 
connection  with  their  keepers. 

The  Nurse  has  annexed  itself  a 
series  of  dramatic  sales  points  which 
will  register  effectively  in  many 
homes.  In  any  domestic  situation 
where  it  is  important  that  persons 
in  one  room  know  what  is  going  on 
in  another  room,  a  demonstration  of 
the  highly  sensitive  device  will  be 
appropriate.  Engineered  to  meet  a 
definite  need,  and  priced  within  the 
reach  of  most  prospects,  the  Nurse 
starts   out   on    a   promising   career. 

'Phones  back  stage 

A  likely  spot  to  sell  good-sized  in- 
stallations is  in  the  local  theater,  ac- 
cording to  incidents  in  Philadelphia 
reported  by  Philco.  The  call-boy  has 
been  replaced  by  Philco-Phones  in 
the  Locust  theater  in  that  city,  with 
excellent  success. 

In  this  case  "the  master  unit  of 
the  system  was  placed  behind  the  set 
for  the  stage  manager  of  the  com- 
pany. The  remote  speaking  units 
were  placed  in  dressing-rooms  on  the 
first,  second,  third  and  fourth  floors 
and  another  unit  was  placed  in  the 
box  office,  connecting  that  point  di- 
rectly with  back-stage. 

"This  makes  possible  simultaneous 
curtain  calls  to  dressing  rooms  on  all 
floors.  It  also  eliminates  the  func- 
tion of  the  call-boy  whose  job  it  was 
to  climb  the  many  flights  of  stairs 
many  times  before  curtain  time.  As 
it  also  provides  communication  with 
one  of  any  desired  number  of  units, 
the  system  allows  the  stage  manager 
to  speak  in  privacy  with  the  occupant 
of  a  dressing  room  as  well  as  issue 
calls." 

Elevator  market 

The  use  of  inter-phones  in  eleva- 
tors, which  has  been  developed  mainly 
by  David  Bogen  Co.,  has  pointed  to  a 
new  and  important  market  for  special 
installations.  Because  of  the  large 
number  of  elevators  in  the  country 
for  which  the  equipment  has  not  even 
been  suggested,  the  possibilities  are 
great. 


32 


Radio  Today 


' 


They're  'TOPS"  in  Quality 

—  thanks  to  Sylvania's  strict  "no  repair"  policy. 


March,  1938 


33 


SOUND  SALES  START  UP 
IN  MARCH 

*  As  shown  by  the  chart,  based  on 
records  of  previous  years,  it  is  in 
March  that  sound  sales  start  climb- 
ing, in  preparation  for  outdoor  "pub- 
lic address"  activity.  The  graph  abovr 
indicates  the  seasonal  buying  of 
sound  equipment  by  dealers,  illustrat- 
ing how  the  peak  of  the  sound  year 
comes  with  the  advent  of  good  out- 
door weather. 

Signalizing  this  renewal  of  sound- 
equipment  activity,  the  April  issue  of 
Radio  Today  will  contain  a  special 
section  on  Selling  Sound.  This  will 
be  a  complete  selling  and  buying  aid 
for  the  sound  specialist  and  for  radio 
men  who  are  interested  in  entering 
this  growing  field.  Sound  applica- 
tions,    installations     and     equipment 


will  be  described  in  detail,  and  there 
will  be  full  reports  on  successful  sell- 
ing and  servicing  methods  that  have 
landed  PA  business  at  a  profit. 

PROSPECTS  EVERYWHERE 

*  Within  easy  reach  of  the  gen- 
tleman on  the  front  cover  of  this 
issue  of  Radio  Today  are  a  number 
of  "sound"  prospects  which  will  stand 
a  re-check. 

Assuming  that  the  gent  lives  in  a 
town  of  average  size,  and  whether 
he  uses  a  map  or  not,  he  can  count 
on  substantial  sound  sales  and  service 
possibilities  in  the  town  hall,  the  bus 
terminal,  two  or  three  churches,  the 
hotel,  the  ball  park,  several  schools 
and  their  associated  playgrounds  and 
gymnasiums,  as  well  as  a  series  of 
talking  signs  and  window  demonstra- 
tions. 


The   sound  business  is  afire  these   days.    This   RCA   equipment   was  altogether 
successful  at  a  recent  blaze  in  Chicago  and  the  idea  catches  on  all  over  the  coun- 
try.   Raymond  Rosen  &  Co.,  Philadelphia  jobbers,  feature  it  locally. 


In  line  with  the  revived  interest 
in  intercommunicating  systems,  the 
dealer  may  count  on  a  good  reception 
in  offices,  manufacturing  plants,  drug 
stores,  restaurants  and  lunch  count- 
ers, department  and  variety  stores, 
the  undertaker,  and  a  couple  of  shoe 
stores.  All  these  in  addition  to  the 
countless  opportunities  in  the  resi- 
dential sections  of  the  town. 

HOT  DAYS  NEED  "P.A." 

*  The  ballroom  of  a  hotel  in  an 
Atlantic  seaboard  city  had  been  se- 
lected for  an  important  sales  meeting. 
About  two  hundred  persons  gathered 
and  the  moderate  size  of  the  group, 
together  with  the  excellent  acoustics 
of  the  room,  led  the  opening  speaker 
to  the  natural  assumption  that  he 
could  get  along  very  well  without  the 
"mike."  But  the  day  being  exces- 
sively warm,  the  hotel  management 
had  set  up  half  a  dozen  fans  in  the 
rear  of  the  ballroom  in  an  effort  to 
keep  a  circulation  of  air  during  the 
lengthy  meeting.  The  speaker,  there- 
fore, was  working  against  a  noise 
level  he  had  not  anticipated. 

After  three  minutes  of  general  cup- 
ping of  hands  to  ears  and  of  whis- 
pered "What  did  he  say?"  to  next 
seat  neighbors  while  the  speaker  per- 
spired and  shouted — the  audience  rose 
as  one  and  demanded,  "Use  the 
mike."  The  speaker  accepted  the  re- 
quest— dropped  his  voice  to  normal 
conversational  tone  —  continued  his 
presentation  easily  and  naturally. 
The  audience  listened  comfortably — 
concentrating  its  attention  on  the 
business  at  hand,  not  on  its  inability 
to  hear — and  pronounced  the  meeting 
the  most  successful  in  years.  The 
individual  members  of  the  audience 
went  home  to  their  communities  and 
territories  thoroughly  convinced  on 
one  point — no  meeting,  large  or 
small,  can  be  efficiently  conducted 
without  a  sound  reenforcing  system. 

CHAPERONING  WITH  SOUND 

*  Another  use  for  outdoor  "sound" 
installations  is  suggested  by  an  item 
in  the  Atlanta  (Ga.)  Constitution. 

At  the  local  Hollywood  Cemetery 
each  night,  reports  the  Constitution, 
two  churchmen  station  themselves 
with  megaphones  to  scare  away  pet- 
ting parties. 

Just  as  the  boy  friend  says  to  the 
girl,  "Let's  have  another  little  drink, 
honey,"  comes  the  strident  admonition 
from  the  darkness :  "The  eyes  of  the 
Lord  are  in  every  place,  beholding  the 
evil  and  the  good."  In  most  cases 
this  puts  a  sudden  stop  to  the  ex- 
change of  pleasantries  and  in  a  few 
seconds  the  car  moves  on. 
(To  page  36) 


34 


Radio  Today 


A  MrtRl  Tt  »^m 


ADJUSTABLE  RESPONSE 

lIGHERoflro.  *ULL    ^T'^ME  MICROPHONE) 

»  PlTClfcWITH  THE  SW1  / 

•  •    .  made  possible  by 

THE  ACOUSTIC  COMPENSATOR 

l^^pat.  pend.) 

Here  is  an  improvement  oi  great  value  at  no  extra  costl 
Exclusive  with  Amperite,  the  Acoustic  Compensator  gives 
you  these  advantages:  B\ 


(l)With  the  flip  of  a  finger,  you  can  now  lower  or  raise  the  respon 
of  the  microphone — without  introducing  any  peaks  or  other  undei 
able  effects.  (Not  a  volume  control.  Gradually  changes  operation  of 
the  microphone  from  constant  velocity  to  constant  pressure.)        Hi 

12)  Permits  adjustment  of  the  microphone  for  most  desirable  response 
for  close  talking  or  distant  pickup. 

(3)  Makes  the  system  immediately   adjustable  to  any  "taste," 
condition,  or  equipment. 

MODELS  RBHK.  RBMk,  with  Acoustic  Compensator.  Frequency 
range  40  to  1 1000  CPS.  Output,  -65  db.  Complete  with  switch,  cable 
connector  and  25'  of  cable.  .  .  .  $42.00  LIST.  Chrome,  $43.00  List. 
MODELS  RBHn.  RBMn.  without  acoustic  compensator,  $42.00  LIST 


IMPROVES    ANY 

"LOW-COST" 
INSTALLATION 
ON  4  COUNTS! 


P.  A.  Men,  you  can  im- 
prove those  "price"  jobs 
by  using  the  popular  Am- 
perite Model  RAH(orRAL). 
You  will  get  better  results 
because  (1)  it  is  excellent 
for  both  speech  and  music; 
(2)  has  flat  response  with- 
out undesirable  peaks;  (3) 
reduces  feedback;  (4) 
stands    up    under   rough 
handling,  changes  in  tem- 
perature,  pressure  or 
humidity.  .  .  .  Frequency  range  60 
to  7500  cps.  Output. -68  db. 
MODEL  RAH  (Hi-imp.)  with  12'  of 
cable;  MODEL  RAL  (200  ohms)  with 
8'  of  cable ONLY  522.00  LIST 


NEW  LOW-PRICED  CONTACT 
MICROPHONE  ..$12. 00  LIST 

The  success  of  our  Model  KTH  ($22.00  List)  has  created 
a  demand  for  a  popular-priced  Amperite  Contact 
Microphone.  The  new  model  listed  below  can  be  used 
on  most  radio  sets  made  since  1935  and  on  all  P. A. 
systems.  It  "makes  an  ordinary  violin  sound  like  a 
Strad"  . . .  gives  a  small  piano  the  tone  of  a  Grand.  And 
yet,  there  is  no  distortion.  No  unnatural  effects.  No 
"lingering  noises."  Installation  is  simple ...  no  changes 
in  strings  or  instruments  . .  .  attached  without  tools. 

Operates  with  either  high  or  low  gain  ampli- 
fiers. Has  frequency  response  of  40  to  9000  cps. 
Output,  -40db.  20' of  cable. 

MODEL  SKH  (Hi-imp);  SKL  (200  ohms)  $12.00  LIST 
SKH  or  SKL  with  toot-operated 

volume  control $20.00  LIST 

Professional  Model  KTH  (or  KTL)  $22.00  LIST 


"TOPS  IN  MIKES" 

Station   KVOL.   of   Lafa- 
yette, La.,  writes  us.  unso- 
licited; ".  .  .  the  Amperite 
mikes  have  been  in  serv- 
ice here  for  almost  three 
years,  and  have  proven 
themselves  to  be  "tops"  in 
mikes.  They  have  broad- 
casted in  the  rain  and  in 
the  hot  sun.   They  have 
even  been  dropped,  but 
they  always  came  through 
in  fine  shape  .   .  ."  The 
AmpeiHe  Studio  Velocity 
Mode!  SR80n  now  has  -56 
db  output.  Frequency  range  40  to 
150O0  cps.  Triple  shielded,   fitted 
with  switch,  (optional),  cable  con- 
nector, and  25'  of  cable. 
MODEL  SR80n  (200  ohms);  S80.00  LIST 
MODEL  SR80Hn  (Hi-imp.),   S80.00  LIST 


S>&lei    •ftldi  TJOX  the  ]&.  -ft.  /Kan  Amperite  offers  the  following  co-operation  to  P.A.  Men. 


(U  FREE  Window  Decal  advertising  your  Sound  Service.  Size  5'/«  x  9'/i.  finished  in  4  striking 
colors.  (2.)  FREE  Window  Display.  11  x  17.  (3.)  Special  Sound  Equipment  Letterheads.  Samples 
and  prices  on  request.  (4.)  FREE  use  of  cut  for  printing  business  cards,  etc. 

Write  tor  these  valuable  sales  helps,  and  new  Illustrated  Bulletins,  today! 


as. 


Amperite  (q. 


561  BROADWAY.  N.  Y.    U.S.A. 


CABLE  ADDRESS 
ALKEM,  NEW  YORK 


AMPERITE 


MICROPHONES 


March,  1938 


35 


SELLING  SOUND 

MISSIONARY  IN  CHINA 
TRAVELS  WITH  SOUND 

*  Further  news  about  the  develop- 
ment of  public  address  equipment  as 
an  aid  to  travelling  missionaries 
comes  from  Central  China.  Father 
Christopher  Sullivan,  representing  the 
Catholic  Mission  there,  has  outfitted 
his  mission  car  with  Webster-Chi- 
cago mobile  speaker  equipment.  The 
Father  has  special  duties  at  present, 
filling  the  needs  of  the  refugees  from 
the  war-torn  sections  of  the  country. 

In  this  case,  the  altar  in  the  trailer 
is  revealed  by  opening  a  section  of  the 


side  of  the  car.  This  lowered  section 
forms  a  platform,  and  two  carpeted 
steps  are  used  at  its  edge.  Turret 
projectors  containing  the  speakers  are 
used  at  the  right  and  at  the  left  of 
the  altar. 


SOUND  HELPS  SHIPS  DOCK 

*  Bigger  and  better  passenger 
ships  have  presented  a  tremendous 
problem  in  docking.  Even  the  aver- 
age and  smaller  vessels  have  long 
been  handicapped  by  the  limited 
acoustical  power  of  the  human  voice 
aided  by  a  megaphone.  Equipment 
which  can  stand  the  gaff  of  salt  at- 
mosphere should  find  a  very  useful 
purpose  in  transmitting  instructions 
for  handling  the  fore  and  after  lines. 


RECORDERS  CLICK  FOR  DEALER 

*  A  new  flourish  in  business  has 
been  stirred  up  at  Wurlitzer's  in  jSTew 
York  City.  The  store  started  a  pro- 
motion on  recording  machines  and 
got  such  a  lively  reaction  that  the 
whole  staff  is  smiling  over  the  stunt. 

The  recorders  were  displayed  in 
windows  and  modestly  advertised  in 
local  newspapers.  Mail  pieces  went 
out  to  selected  lists.  The  parade  to 
the  store  was  started  by  vocalists,  in- 
strumentalists, musical  arrangers, 
composers,  etc.,  and  scores  of  non- 
professional persons  interested  in 
singing  or  speaking  were  also  at- 
tracted. 

People  get  such  a  kick  out  of  hav- 
iny  their  own  efforts  recorded  and 
"played  back,"  that  the  equipment  is 
dead  easy  to  advertise  and  demon- 
strate.    Most  folks  suspect  themselves 


of  having  hidden  talent  in  their 
voices  anyway:  Some  are  anxious  to 
find  out  how  they  sound  "on  the  air," 
some  are  seeking  novelty  gadgets  for 
home  entertainment,  some  want  rec- 
ords of  rehearsals,  and  others  are  just 
training  their  voices  or  getting  ac- 
quainted with  a  mike. 

Under  the  direction  of  department 
head  Alfred  C.  Tuffery,  the  store  cen- 
ters the  activity  in  a  small  room  in- 
expensively lined  with  curtains. 
Presto  equipment  is  being  featured. 
The  store  also  records  and  sells  per- 
sonal records  from  50c  and  up,  which 
the  customers  make  for  greeting 
cards,  auditions,  and  for  all  sorts  of 
stunts  in  voice  production. 

Wurlitzer's  find  that  the  recorder 
business  naturally  stimulates  the  sale 
of  record  players,  hikes  store  traffic, 
and  makes  many  valuable  acquaint- 
ances in  the  musical  world. 


A  section  of  the  window  display  at  Wurlitzer's,  NYC,  featuring  recorders. 


as   well   as   the  gangplanks  for  both 
arrivals  and  departures. 

If  the  loudspeaker  mountings  are 
made  flexible  the  same  equipment 
may  be  made  to  serve  a  useful  pur- 
pose in  speeding  up  the  loading  and 
unloading  of  the  ship's  cargo.  This 
is  particularly  important  today,  as 
the  advent  of  oil  burners  has  elim- 
inated the  lay-overs  for  coaling.  The 
large  investment  in  ships  automat- 
ically necessitates  the  shortest  pos- 
sible time  in  port,  since  floating  stock 
has  no  earning  power  except  at  sea. 
Successful  ship  operators  view  with 
decided  favor  any  proposals  which 
will   speed   up   their  port    operations. 

AMPLIFIED  GONG 

*  At  Severance  Hall  in  Cleve- 
land, which  is  the  home  of  the  Cleve- 
land Orchestra,  a  special  sound  in- 
stallation has  been  engineered  to 
employ  a  Deagan  gong  for  three  pur- 
poses :  as  the  tone  used  by  the  or- 
chestra for  tuning  their  instruments, 
to  call  members  of  the  orchestra  to 
their  places,  and  to  signal  the  audi- 
ence into  the  auditorium. 

An  orchestra  official,  Adella  Pren- 
tiss Hughes,  says  that  '^because  the 
440A  is  a  beautiful  sound  as  well  as 
the  note  to  which  all  instruments  of 
an  orchestra  are  tuned  and  because 
chime  gongs  for  audience  calls  be- 
came so  common.  I  took  the  problem 
to  A.  L.  Williams,  president  of  the 
Brush  Development  Co." 

Gong,  microphone  and  amplifying 
system  are  located  in  the  basement. 
The  system  includes  15  crystal  speaker 
outlets,  so  that  orchestra  members 
on  the  lower  floor,  the  foyers,  prom- 
enade balcony  and  the  office,  may 
hear,  and  tune  their  instruments  be- 
fore they  go  to  the  stage. 

LAMP  POSTS  LEARN  TO  TALK 

*  The  military  experts  in  Eng- 
land are  "thinking  of  everything"  in 
their  preparation  for  possible  war. 
One  of  their  recent  problems  was 
how  to  guide  police  and  military  mo- 
tor vehicles  along  the  city  streets 
when  all  lig'hts  are  out,  in  anticipa- 
tion of  an  air  raid.  According  to 
D'r.  E.  E.  Free,  New  York  scientist, 
recent  experiments  indicate  that 
"talking  lamp  posts"  may  be  the 
answer. 

During  air-raid  "blackouts,"  mo- 
tor vehicles  are  able  to  keep  on  road- 
ways if  the  curbs  are  painted  white, 
but  it  is  difficult  to  identify  cross 
streets.  The  suggestion  is  that  cor- 
ner lamp  posts  be  equipped  with  loud- 
speakers and  electric  phonographs 
repeating  softly  but  continually  the 
names     of    the    intersecting    streets. 


36 


Radio  Today 


SELLING  RECORDS 


RECORD   SOCIETY 

*  A  brand  new  stimulation  for 
the  sale  of  records  is  the  formation 
of  the  Victor  Eecord  Society,  recent- 
ly announced  by  Thomas  F.  Joyce, 
RCA  advertising  manager.  The  plan 
is  designed  to  hike  the  number  of 
record-players  in  use,  to  attract  new 
fans,  and  to  garner  extra  profits  for 
the  dealer.  Details  were  worked  out 
after  extensive  experiments  in  ten  dif- 
ferent U.  S.  cities. 

To  join,,  a  customer  pays  $6  mem- 
bership fee  and  buys  $9  worth  of  Vic- 
tor records  of  his  selection.  He  gets 
a  new  record-player  which  plays 
through  his  radio,  ordinarily  costing 
$14.95.  He  also  gets  a  monthly  So- 
ciety review,  in  addition  to  the  book- 
let, "The  Music  America  Loves  Best," 
and  correspondence  privileges  with 
the  RCA  music  director.  The  Society 
plan  is  supported  by  a  terrific  adver- 
tising campaign. 

H  the  customer  buys  $60  worth  of 
Victor  records,  at  the  rate  of  not  less 
than  $1  worth  per  week,  he  is  eligible 
to  receive  a  dividend  of  $1.50  in  discs 
of  his  choice  for  each  $15  of  accu- 
mulated purchases,  up  to  $60. 

For  the  dealer,  the  plan  results  in 
a  normal  cut  from  the  membership 
fees,  and  the  virtual  insurance  of  a 
$60  additional  volume  from  most  of 
the   Society  members. 


WAX  WORTH  WATCHING 


il  FREDDY  MARTIN  and  his  orchestra  playing 
Mammy  Bong  with  vocal  refrain  by  the  Martin-Aires 
Trio  and  My  Day,  with  vocal  by  Elmer  Feldcamp — 
Bluebird  B7420. 

BUNNY  BERIGAN  and  his  orchestra  playing  Out- 
side of  Paradise  from  the  Republic  film  of  the  same 
name,  and  A  Serenade  to  the  Stars  from  the  Universal 
film  "Mad  About  Music,"  both  with  vocal  by  Gail 
Reese — Victor  25781. 

LOUIS  ARMSTRONG  and  his  orchestra  playing  Let 
That  Be  a  Lesson  to  You,  from  Warner  Bros.'  "Holly- 
wood Hotel"  with  VC  by  Armstrong  and  Struttin' 
With    Some    Barbecue — Decca    1661. 

FREDDIE  RICH  and  his  orchestra  playing  Whistle 
While  You  Work  and  I'm  Wishing,  both  from  the 
Walt  Disney  feature  '!Snow  White,"  both  with  VC 
by  The  Clubmen — Decca  1631. 

BOB  SYLVESTER  and  his  orchestra  playing  I  See 
Your  Face  Before  Me  from  "Between  the  Devil"  and 
Down  Where  the  Trade  Winds  Blow  from  "Hawaii 
Calls,"  both  with  VC  by  Olga  Vernon — Vocalion  3946. 

RUSS  MORGAN  playing  Home  Town  with  VC  by 
Jimmy  Lewis  and  Moonlight  on  the  Sunset  Trail  with 
VC  by  Russ  Morgan — Brunswick  8066. 

HORACE  HE1DT  and  his  Brigadiers  playing  Ti-Pi- 
Tin,  with  VC  bv  Lysbeth  Hughes,  Larry  Cotton,  The 
Kings  and  Glee  Club  and  A  Shack  in  the  Back  of  the 
Hills,  with  VC  by  Larry  Cotton — Brunswick  8078. 

RAY  NOBLE  and  his  orchestra  playing  The  Moon 
of  Manakoora  from  "The  Hurricane"  and  I  Hadn't 
Anyone  'Till  Now,  both  with  VC  by  Tony  Martin — 
Brunswick  8079. 

JERRY  BLAINE  and  his  Streamline  Rhythm  play- 
ing Ti-Pi-Tin  with  VC  by  Phyllis  Kenny  and  Stream- 
line Trio  and  Prove  It,  with  VC  by  Phyllis  Kenny- 
Bluebird  B7443. 

GUY  L0MBARD0  and  his  Royal  Canadians  playing 
Ti-Pi-Tin,  with  VC  by  male  trio,  and  Let's  Sail  to 
Dreamland,  with  VC  by  Carmen  Lombardo — Victor 
25786. 


announcing 

MULTI-STAGE 

Inverse   Feed-back 


In 
Model  2L-25 


PARTICULARLY    ADAPTED    TO 
CRITICAL    INSTALLATIONS 


Another  big  improvement  in  tone 
quality  by  Webster-Chicago  •  .  . 
Beam  type  circuit,  using  Multi- 
stage  Inverse   Feed-Back. 


Model  2L-25  Amplifier,  Under- 
writers' Laboratories  Approved, 
marks  another  milestone  in  the 
tone  history  of  Sound.  Just  listen 
to  it  at  your  distributors  and  make 
your  own  comparisons.  Distortion 
is  kept  to  2}A0/o  at  25  watts.  The 
frequency  characteristic  is  plus  or 
minus  \y%  d.b.  from  50  to  10,000 
cycles.  Multi-Stage  Degeneration. 
From  these  unusual  values  it  can 
be  easily  appreciated  that  Model 
2L-25  is  particularly  adaptable  to 
the  most  critical  installations,  (where 
crowds  do  not  exceed  4,000). 
Economically   priced. 


•  4  Stage,  7-Tube 
Beam  Circuit 


•  2  High  Gain  Inputs 


•  Electronic  Mixing 
Circuit 


•  Multi-Stage 
Degeneration 


•  Underwriters' 
Laboratories 
Approved 


WEBSTER -CHICAGO 


LICENSED 

UNDER 

ALL 

IMPORTANT 

PATENTS 


WEBSTER-CHICAGO 

Section     M-9,     5622     Bloomingdale     Ave.,     Chicago,     III. 

□  Model   2L-25 
Send  me  more   information  on  n  General    Catalog 

Name    

Address    

City State 


March,   1938 


37 


DYNAMIC  TESTING  GETS  EXPERTS'   OK 

Servicemen,   jobbers,   and   manufacturers   acclaim 
Radio   Today's    new    method    of   radio   servicing 


*  At  a  recent  meeting  of  the  N.  Y. 
Chapter  of  the  Radio  Servicemen  of 
America,  Radio  Today's  Service  Edi- 
tor, Vinton  K.  Ulrich  pointed  out  that 
Dynamic  Servicing  is  not  merely  gain- 
testing  or  stage-hy-stage  testing,  al- 
though it  does  make  use  of  those  test 
principles. 

Dynamic  Servicing  goes  much  fur- 
ther than  to  locate  the  defective  stage. 
The  procedure  now  being  developed  by 
Radio  Today  will  enable  the  service- 
man to  spot  the  exact  difficulty  in  a 
defective  stage.  (Naturally  if  the  stage 
is  completely  dead,  it  cannot  be  an- 
alyzed dynamically — but  since  such  a 
state  of  affairs  indicates  something 
radically  out  of  order,  the  trouble  can 
be  found  without  difficulty  using  or- 
dinary test  methods.) 

Locating  troubles  by  dynamic  analy- 
sis is  the  co-ordination  of  many  meth- 
ods of  many  engineers — and  Radio 
Today"  for  the  first  time  is  organizing 
the  various  ideas,  simplifying  them 
and  putting  them  into  a  simple  pro- 
cedure that  will  save  the  serviceman 
much  time  in  repairing  radio  sets. 

Visual  or  aural  analysis 

In  order  to  make  dynamic  servicing 
the  simplest  form  of  radio  testing, 
whether  or  not  an  oscilloscope  is  used. 
Radio  Today  is  now  conducting  a 
series  of  tests  which  will  aid  in  de- 
veloping the  specific  test  procedure  to 
be  employed  in  each  stage.  Future 
articles  in  Radio  Today  will  give  com- 
plete details  of  how  to  employ  dynamic 
testing  in  every  day  radio  work. 

Letters  from  radio  set  manufactur- 
ers indicate  that  they  are  in  favor  of 
dynamic  servicing  and  consequently 
it  can  be  assumed  that  as  the  proce- 
dure is  developed,  service  notes  will 
contain  the  essential  data  for  dyna- 
testing.  A  few  of  the  comments 
follow: 

Service  Manager,  G.  H.  Glassman  of 
Fairbanks,  Morse  &  Co.  states,  "To 
my  way  of  thinking,  Mr.  Ulrich's  so- 
called  Dynamic  Testing  is  the  most 
practical  method  of  testing  a  radio 
receiver,  when  we  consider  the  matter 
from  an  all-round  standpoint.*  I 
might  go  so  far  as  to  say  that  I  be- 
lieve, in  a  measure,  it  is  used  by  all 
servicemen.  This  statement  must  be 
qualified,  however,  in  view  of  the  fact 
that  heretofore  to  the  best  of  my 
knowledge  no  definite  procedure  has 
ever  been  set  up  and  I  doubt  very 
much  if  any  servicemen  has  a  definite 
procedure  when  making  such  a  check. 
Further,  I  do  not  believe  any  testing 
equipment  specifically  designed  tor 
the  purpose  of  such  testing  nas  ever 
been  available. 

Save  time 

"If  this  system  can  he  properly 
worked  out,  it  will  be  of  benefit  to 
radio-set  manufacturers  In  that  it 
will  give  the  radio  serviceman  on  the 

*A11    italics    in   this   article   are    the    Editor's. 


outside  a  better  picture  of  what  is  ac- 
tually going  on  and  what  may  be 
wrong  with  the  receiver  than  is  true 
today.  More  important  in  my  mind 
is  the  benefit  that  can  be  derived  by 
the  serviceman  himself  inasmuch  as 
after  having  become  thoroughly  famil- 
iar with  this  system  of  analysis  he 
will  he  able  to  save  much  time  in  his 
work. 

"Summing  this  all  up  in  a  few 
words,"  Mr.  Glassman  declares,  "I  be- 
lieve Mr.  Ulrich's  idea  is  a  step  in 
the  right  direction  and  I  shall  follow 
developments   with   interest." 

A.  T.  Alexander,  service  manager  of 
Motorola  writes,  "I,  personally,  feel 
that  this  is  the  beginning  of  a  very 
interesting  and  valuable  discussion. 
and  I  feel  that  it  is  right  in  line  with 
an  idea  which  we  started  last  year  in 
our  service  notes,  and  are  continuing 
this  year  with  a  little  expansion. 

Localizing  trouble 

"Since  we  are  already  using  at  least 
a  small  portion  of  this  system  through 
the  advocation  of  stage  gain  measure- 
ments throughout  the  receiver,  as  a 
quick  method  of  localizing  the  source 
of  trouble,  I,  personally,  foresee  some 
of  the  discussion  which  will  come  up 
in  future  articles." 

"J  think  that  the  dynamic  method 
of  analysis  will  work  in  very  nicely 
with  the  other  types  of  tests,"  writes 
Samuel  C.  Milbourne,  Service  Engineer 
of  Supreme  Instruments  Corporation. 
"Radio  servicing  is  becoming  such  a 
complicated  business  that  no  one  test 
or  set  of  tests  can  properly  be  called 
universal. 

"Of  course,  it  is  easy  to  pick  flaws 
in  any  system  and  the  most  obvious 
flaw    in    a   dynamic   analysis    is    that 


With  dynamic  testing  the  actual  cir- 
cuits and  values  of  parts  are  less  im- 
portant. Chief  item  is  that  all  the 
parts  are  working  in  proper  relation- 
ship with  one  another.  (Circuit  above 
is  the  bandspread  arrangement  of 
coils  in  current  RCA-Victor  sets.) 


when  you  come  to  a  dead  stage,  the 
stage  is  no  longer  in  a  dynamic  con- 
dition and,  therefore,  you  must  resort 
to  ohmmeter,  milliammeter  and  volt- 
meter measurements  to  determine  the 
open  circuits  or  shorted  circuit." 

"One  thought  which  occurs  to  us  at 
the  present  time  is  that  as  far  as  the 
radio  manufacturer  is  concerned." 
comments  J.  M.  Bowmaster,  service 
manager  for  Sparton,  "the .  equivalent 
of  'Dynamic'  testing  is  already  in 
use  where  work  is  being  done  by  the 
manufacturer's  own  servicemen.  That 
is  to  say,  in  our  own  case  Sparton 
radio  receivers  being  tested  in  Spar- 
ton Radio  Service  Departments  by 
men  who  are  familiar  with  Sparton 
radio  receivers  are  actually  given  an 
equivalent  of  the  dynamic  method. 
This  is  undoubtedly  because  such 
manufacturer's  servicemen  are  more 
familiar  with  the  product  than  any- 
one else  and  failures  or  abnormalities 
in  the  set  are  most  quickly  located 
by  following  a  procedure  very  similar 
to  the  'Dynamic'  method  proposed  by 
Mr.  Ulrich." 

Henry  L.  Paiste,  Jr.,  sales  engineer 
of  Philco  says,  "Bob  Herr  asked  me 
to  read  over  Mr.  Ulrich's  article  on 
'Dynamic  Testing  of  Radio  Sets.'  This 
is  rather  a  fancy  name  for  a  stage-by- 
stage  method  of  gain  testing  of  radio 
circuits.  But,  it  is  in  line  with  the 
practice  followed  by  better  service- 
men in  most  parts  of  the  country.  We 
have  recommended  it  in  a  very  small 
way  to  servicemen  in  various  meet- 
ings and  in  written  articles  on  the 
subject  for  the  past  several  years. 

Full  performance  of  set 

"The  stage-by-stage  measurements 
of  radio  performance  is  highly  recom- 
mended to  Philco  dealers  and  service- 
men, and  has  been  for  the  past  sev- 
eral years,  as  a  method  of  saving  time 
and  avoiding  unnecessary  testing  in 
locating  failure  or  weakness  in  a  re- 
ceiver on  test." 

"As  far  as  the  general  adoption  of 
such  a  method  of  testing  is  concerned,'' 
states  J.  N.  Golten,  service  manager 
of  Stewart-Warner  Corp.,  "any  im- 
provement in  the  methods  or  equip- 
ment used  by  servicemen  is  bound  to 
react  favorably  toward  all  radio  man- 
ufacturers, since  such  increased  knowl- 
edge can  enable  the  serviceman  to 
give  his  customer  the  full  benefits  of 
the  performance  the  radio  set  is  ca- 
pable of  delivering." 

"We  are  in  favor  of  the  type  of  test- 
ing this  article  covers,"  writes  L.  E. 
Priscal,  service  manager  for  Erla, 
"but  at  the  present  time  the  service- 
man really  does  not  have  the  kind  of 
equipment  that  will  permit  him  to 
make  some  of  the  tests  outlined  in 
the  article.  Naturally,  we  approve  of 
anything  that  will  help  the  repairman 
to  do  a  better  job  faster,  but  we 
frankly  feel  that  with  the  type  of 
equipment  the  average  serviceman  has 
today,  he  would  not  be  able  to  make 


38 


Radio  Today 


some  of  the  checks  the  article  de- 
scribes and  most  of  those  who  do  have 
the  equipment  that  would  permit  them 
to  make  the  checks  do  not  have 
enough  technical  knowledge  to  make 
them  correctly  or  to  determine  from 
their  checks  what  is  occurring  in  the 
stage  under  test. 

"It  does  have  definite  advantages 
over  point-to-point  and  voltage  meth- 
ods of  checking  defective  radios,  but 
when  viewed  from  the  serviceman's 
side,  it  does  have  definite  limitations 
— at  least,  at  the  present  time." 

Dynamic  vs.  static  testing 

"I  am  sure  no  one  can  disagree 
with  the  statement  that  receivers 
should  oe  tested  under  dynamic  rather 
than  static  conditions,"  states  Tobe  C. 
Deutschmann.  "Such  testing  particu- 
larly in  the  radio  frequency  circuits 
should  reveal  certain  types  of  con- 
denser trouble  which  do  not  show  up 
in  the  conventional   test   procedures." 

And  from  servicemen  in  the  field 
Radio  Today  has  received  numerous 
letters  commenting  on  the  method  and 
asking  for  more  data.  One  service- 
man-engineer "predicts  that  eventually 
yours  (dynamic)  will  be  the  accepted 
standard  of  procedure."  And  he  adds, 
"I  know  it  will  pay  the  servicemen  to 
follow  you.  .  .  .  There  is  no  doubt  in 
my  mind  that  you  are  about  to  ren- 
der a  great  service  to  many  service- 
men and  listeners  alike.  .  .  .  It  is  the 
one  road  forward." 

Stan  Gilhooly  of  Van  Dyke,  Mich., 
writes,  ".  .  .  very  interesting.  Could 
you  give  us  more  on  this  subject  in 
future  issues  of  Radio  Today.  ...  I 
am  thinking  of  adopting  this  method 
of  testing  and  woud  like  to  get  started." 


Out  in  Cicero,  111.,  Leo  Lewandowski 
would  like  us,  "to  go  in  more  detail 
on  this  systematic  testing  of  receivers 
for  me  and  others  in  future  articles." 
Leo  further  says,  "I  have  read  your 
article  and  like  it  very  much." 

More  details  wanted 

"Would  like  to  use  this  method  of 
testing  but  first  would  like  to  have 
all  the  details,"  requests  John  Hall  of 
Long  Eddy,  N.  Y. 

From  "Washington,  D.  C,  Larry  Lus- 
tic  writes,  "Appreciate  the  information 
in  the  Feb.  issue,  Dynamic  Testing  of 
Radio  Sets  .  .  .  may  I  have  the  priv- 
ilege of  asking  more  detailed,  con- 
structive data."   ' 

Wells  Electric  Co.,  in  Bluffton,  Ind., 
says,  ".  .  .  we  think  it  fine.  Do  you 
have  any  booklet  or  paper  of  the 
technique  of  this  system,  showing  the 
step  by  step  method  through  an  en- 
tire set  with  full  details?"  (Not  yet, 
but  we  will  soon  have  it  in  Radio 
Today,  month  by  month — Editor.) 

"Very,  very  interesting  to  me,"  com- 
ments Earl  Beecher  of  Allentown,  Pa. 
"...  I  would  like  to  learn  more  about 
this  type  of  servicing  radios." 

"Your  article  'Dynamic  Testing'  is 
of  great  value  to  servicemen,"  writes 
H.  Elliott  of  Hopewell,  Va. 

Carl  Evans,  Concord,  N.  H.,  parts 
jobber  believes,  "that  the  system  has 
its  points,  as  quite  frequently  minor 
troubles  will  be  found  which  wouldn't 
have  been  found  otherwise.  This  re- 
quires more  replacement  parts,  and 
hence  more  parts  business  for  the  job- 
ber. This  also  means  more  satisfac- 
tion for  the  consumer,  which  improves 
good-will  for  the  serviceman." 


DELCO  PUSH  BUTTON  TUNER 

*  Home  type  push  button  tuning 
mechanisms  have  been  described  in 
previous  issues  of  Radio  Today*. 

Latest  development  in  this  field  is 
automatic  tuning  for  auto  radios.  In 
the  auto  sets  both  motor  and  lever 
type  mechanisms  are  employed. 

The  Delco  system  which  is  to  be  de- 
scribed and  explained  this  month  is 
a  motor  operated  device  which  goes 
directly  to  the  selected  station.  The 
station  selector  is  mechanical  in  ope- 
ration since  the  device  does  not  de- 
pend upon  electrical  contacts  for  stop- 
ping at  the  desired  station. 

Unlike  the  home  type  mechanisms, 
the  Delco  auto  radio  tuner  employs 
push  buttons  that  operate  electric  re- 
lays to  work  the  cams  and  levers  In 
the  device.  In  previous  mechanisms 
the  push  button  has  been  mechanically 
coupled  to  the  device. 

The  diagram  on  page  44  shows 
how  the  device  is  wired  and  indicates 
the  important  parts  of  the  unit.  For 
simplification  the  six  buttons  and  the 
associated  relays  have  been  represent- 
ed by  a  single  push  button.  Actually 
the  six  of  them  are  in  parallel. 

A  double  contact  push  button  is  em- 
ployed with  a  magnet  or  hold-down 
coil  to  keep  the  contacts  closed  until 
the  station  is  selected  by  the  mechan- 
ism. When  this  double  contact  but- 
ton is  depressed,  one  set  of  contacts 
(To  page  44) 


*RCA,  G-E,  Sparton  described  on  page  24 
Sept.  1937;  Stewart-Warner,  Admiral  on 
page  42  Oct.  193?;  Motorola,  Detrola  page  46 
Nov.  1937;  Wells-Gardner  on  page  28  Dec. 
1937. 


of 


Air  King's  models  810  and  815  are  very  similar,  though  one  is  designed  for  AC   operation  and  the  other  for   DC. 
difference  is  in  the  power  supply.    Note  the  series  filament  circuit  in  the  AC  model. 


Main 


March,  1938 


39 


APPLIANCES  IN  ACTION 


APPLIANCES  IN  HOMES 

*  The  electrical  way  of  living  has 
continued  to  catch  on  nicely  in 
American  homes,  according  to  the 
latest  figures  on  the  subject. 

Preliminary  totals  released  by  the 
Edison  Electric  Institute  show  that 
the  use  of  domestic  electric  service 
in  1937  increased  14  per  cent  over 
the  previous  year.  The  1936  con- 
sumption amounted  to  15,659,000,000 
kwhr.,  while  the  total  for  1937  is  set, 
in  the  first  figures,  at  17,820,000,000 
kwhr.  Of  the  latter  figure,  the  use 
of  appliances  accounted  for  11,454,- 
175,000  kwhr. 

The  Institute  report  includes  fig- 
ures on  saturation,  which  are  of 
smash  interest  to  the  merchandisers 
of  appliances  in  1938.  Of  the  14  ap- 
pliances listed,  saturation  ranges 
from  2  per  cent  for  water  heaters  to 
106  per  cent  for  (socket)  radios.  Rim- 
ing close  to  radio  for  top  place  in 
saturation  are  flatirons,  rated  at  103 
per  cent.  Saturation  figures  are  based 
on  a  summation  of  annual  sales,  less 
an' estimated  replacement  demand. 

As  for  the  kwhr.  per  year,  per  ap- 
pliance, normal  use  in  1937,  the  fig- 
ures range  from  15  for  electric  clocks 
to  3,300  for  water  heaters.  Radio  is 
rated  as  100,  well  up  among  the 
major  appliances  and  certainly  high 
enough  to  invite  the  interest  of  the 
utility  companies. 

The  complete  figures  are  lined  up: 

No.  of  Kwhr.  per 

appliances  year,  per 

m  homes  appliance, 

Dec.  31,  1937  Saturation  normal  use 

Refrigerators     11,300,000  50%  420 

Radios  (socket  sets).    23,750,000  106%  100 

Ranges    1,775,000  8%  1,200 

Flatirons     23,100,000  103%  80 

Water     Heaters 528,000  2%  3,300 

Oil    Burners    1,360,000  6%  250 

Washing    Machines,.   11,050,000  49%  30 

Vacuum     Cleaners..   11,175,000  50%  24 

Toasters    10,500,000  47%  30 

Electric     Clocks 11,500,000  51%  15 

Ironing     Machines..     1,315,000  6%  125 

Percolators      6,000.000  27%  36 

Space    Heaters 4,750.000  21%  50 

Roasters      650,000  3%  250 


PLEASANTAIRE  ENTERS 
THIRD  SEASON 

*  Pleasantaire  Corporation,  Wash- 
ington, D.  O,  first  showed  its  new 
1938  Model  B  room-cooler  during  the 
New  York  Heating  and  Ventilating 
Exposition,  marking  its  third  season. 
According  to  Richard  F.  Roper, 
Pleasantaire  president,  the  new  room- 
cooler  incorporates  15  important  re- 
finements,   including    Morocco    finish 


Pleasantaire  Model  B-2000  room- 
cooler. 


optional  in  ivory  or  brown,  Uni-fin 
grille,  fresh-air  opening  with  spun- 
glass  filter,  and  a  smoke  and  stale-air 
exhaust.  Basic  refrigeration  princi- 
ples remain  the  same  and  new  floating 
rubber  mountings  for  the  500-watt  re- 
frigeration mechanism  insure  reliable 
operation  of  the  condensation  exhaust 
fan. 

Pleasantaire  sales  this  year  will  be 
direct  to  dealers.  The  nationally  ad- 
vertised list  price  is  $199.50  f.o.b.  fac- 
tory, with  discounts  to  dealers  of  40 
per  cent  in  lots  of  six  or  more  and 
33  1/3  per  cent  in  lots  of  one  to  five. 
Backing  dealers  is  the  Pleasantaire 
Package  Plan,  a  detailed  merchandis- 
ing plan  for  selling  room  coolers, 
copies  of  which  are  being  sent  to  deal- 
ers on  request. 

The  company  maintains  that  its 
product  should  be  sold  direct  to  spe- 
cialty dealers  as  an  appliance  rather 
than  through  contractors.  The  whole 
campaign  stresses  "relief  from  hot 
weather  suffering."  Factory  is  already 
booked  up  on  March  manufacturing 
and  is  accepting  orders  for  April  and 
subsequent  production. 


Steem-Electric  iron 


does  away  with  sprinkling,  dampen- 
ing and  rolling.  Holds  1  pint  of 
water,  uses  AC  or  DC  current.  Home 
model,  $12.95.  Available  in  larger 
Commercial  model.  The  Steem  Elec- 
tric, 11  W.  42nd  St.,  New  York,  N.  Y. 
— Radio  Today. 


Air  Healthifier 

•k  Presented  in  three  models  for 
humidifying,  washing  and  circulating 
the  air  in  home,  office  or  shop.  Reser- 
voir holds  three  gallons  of  water, 
which  is  pumped  to  12  moisture  cell 
"distributors"  below  the  fan.  Current 
used  is  rated  in  amount  similar  to 
that  used  by  40-watt  lamp.  Installa- 
tion consists  of  simply  plugging  in — 


no  plumbing  required.  Zephyr  model 
(end  table  style  illustrated  herewith) 
is  27  in.  long,  16  in.  wide,  24  in.  high, 
$83.50.  Sentinel  model  is  16  x  16  x  24, 
$64.50.  Companion  model  is  28xl6x 
26,  $80.50.  Lion  Mfg.  Co.,  2640  Bel- 
mont Ave.,  Chicago,  III. — Radio  Today. 


Samson  rubber-bladed 
air-coolers 


+  A  new  iron  which  contains  a 
water  chamber  from  which  steam 
emerges  through  holes  at  the  tip  of  the 
ironing  surface.  Distribution  of  steam 


*  New  line  includes  24  different 
models;  stationary,  oscillating,  desk 
and  pedestal  styles  in  sizes  from  6  to 
24  inches,  for  home,  business  and  auto 
use.  Flexible  blades  covered  by  5-year 
guarantee.  Consumes  195  watts;  ve- 
locity is  850  rpm.  Samson  United 
Corp.,  Rochester,  N.  Y.— Radio  Today. 

(To  page  53) 


40 


Radio  Today 


IRC  POWER  WIRE 
WOUND  RESISTORS 


Type  CS  STANDARD  and  SPECIAL 
REPLACEMENT  CONTROLS 


INTERNATIONAL  RESISTANCE  COMPANY 

401  NORTH  BROAD  STREET,  PHILADELPHIA.  PA 
Factories  or  Licensees  in  Canada,  England,  France,  Germany,  Italy,  Denmark  and  Australia 

MAKERS   OF  RESISTANCE   UNITS   OF  MORE  TYPES,  IN   MORE  SHAPES,  FOR 
MORE  APPLICATIONS  THAN  ANY  OTHER   MANUFACTURER   IN  THE  WORLD 


March,   1938 


41 


1 1 

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ROOM    COOLERS 

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zm 

JUNE 

JULY 

AUGUST     1 

1                         i 

CAMERAS           J 

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*  AMONG  the  plans  being 
cooked  up  by  dealers  these  days  are 
some  snappy  projects  in  Spring  mer- 
chandising. 

As  the  warm  days  come  along,  there 
are  new  chances  to  fight  the  reces- 
sion, new  ways  to  get  folks  into 
stores,  and  new  merchandise  with  ex- 
ceptional appeal.  Dealers  report  that 
Spring  promotion  this  season  will  get 
an  unusual  play,  because  things  have 
been  dull  and  any  additional  mer- 
chandise which  looks  like  a  good  bet 
will  be  played  to  the  limit.  Sales  ef- 
forts will  be  scaled  up  to  get  the  profit 
figures  back  where  they  belong. 

Among  the  chief  items  of  interest 
to  dealers  who  are  counting  on  Spring 
prosperity  are  room-coolers,  cameras 
and  electric  fans.  All  these  come  in 
with  the  high  temperatures,  and  have 
been  of  special  interest  to  radio 
outlets. 


Eight  now  dealers  have  a  special 
welcome  for  merchandise  on  which 
there  is  price  protection,  and  no 
trade-in  problems.  Supplementary 
lines,  which  involve  less  fuss  about 
time  payments,  more  unit  sales,  and 
fewer  service  problems,  are  downright 
attractive  at  the  moment. 

Selling  comfort 

A  great  deal  has  taken  place  in  the 
space-cooler  field  since  last  year,  and 
it  is  good  news  to  the  dealer.  More 
manufacturers  have  entered  the  field 
and  are  taking  pains  to  sell  the  idea 
to  the  public  on  a  national  scale. 
Many  of  them  have  introduced  lower- 
priced  units  in  a  substantial  attempt 
to  reach  homes  with  lower  incomes, 
while  some  of  the  veteran  specialists 
stick  to  higher  prices  and  use  more 
features  and  more  engineering  back- 


ground to  selling  their  products. 

The  new  model  coolers  are  more 
compact  and  employ  new  tricks  in 
design  which  were  picked  up  in  last 
year's  experience.  Most  of  them  are 
"room-proved"  and  fit  right  in  with 
the  popular  demand  for  complete  "air 
happiness."  The  cabinets  of  some  are 
created  this  year  by  big  names  in  the 
design  field. 

Meanwhile  the  marketing  of  the 
cooling  devices  is  expertly  based  on 
the  fact  that  people  may  not  be  buy- 
ing as  many  luxury  items  as  they 
were  last  year.  Merchandisers  are 
playing  up  the  health  angle  and  have 
made  detailed  studies  of  human  lungs 
as  they  are  concerned  with  the  indus- 
try of  air  conditioning.  It  turns  out 
that  room  coolers  are  not  luxury 
items.  Increased  efficiency  in  offices, 
health  and  comfort  at  home  are  sound 
and  economical  investments. 


0 


lick 


ameras  c 

When  the  population  starts  to  rush 
out-if -doors  this  Spring,  millions  of 
cameras  will  be  taken  along.  The 
picture-taking  craze  which  swept  the 
nation  as  a  fad  has  remained  to  be- 
come an   American  custom. 

While  radio  men  are  outfitting 
their  customers  with  portable  radios 
and  auto  sets,  cameras  and  projectors 
work  in  as  ideal  additions  to  stock. 
Camera  displays  fit  in  neatly  with 
Spring  displays  and  the  manufactur- 
ers are  making  them  available  at 
once. 

Snapshots  and  demonstration  films 
will  now  concern  outdoor  Spring  ac- 
tivity as  displayed  in  radio  windows 
and  counters,  and  have  what  it  takes 
as  attention-getters  for  prospects  who 
are  thinking  about  those  very  things. 
Soon  youngsters  will  be  playing  out- 
side, and  that  is  one  of  the  chief  rea- 
sons why  parents  will  buy. 

Camera  buyers  keep  coming  back 
for  films  and  accessories,  particularly 
at  this  season  when  a  great  deal  of 
film  is  used.  This  means  traffic,  a£ 
well  as  more  prospects  for  radio  and 
appliances. 

The  blades 

For  a  long  time,  fans  have  been 
used  as  traffic  builders  and  prospect- 
getters.  This  Spring  they  have  new 
characteristics  and  new  advantages  to 
radio  men,  the  field  has  moved 
smartly  toward  more  profit  for  the 
retailer. 

The  merchandise  has  been  stream- 
lined, quieted,  and  utility-designed 
for  multiple  uses.  The  fans  have  a 
new  safety  angle  and  many  have  been 
styled  for  particular  rooms  in  the 
home,  so  that  a  series  may  be  sold  to 
a  single  customer. 


42 


Radio  Today 


IN  THE  U.  S.  AIR  CORPS,  TOO, 
*vwmw  DO  THEIR  "BIT"/ 

Zooming  through  the  air  at  breath-taking  speed  with  machine  guns 
barking,  communications  between  the  U.  S.  air  fleets,  and  ground  head- 
quarters must  go  through!  To  weather  such  gruelling  tests  a  tube  must  be 
sturdy  . . .  must  be  designed  and  tested  to  perform  consistently  and  smoothly 
under  all  circuit  conditions!  This  is  the  punishment  Raytheons  take  every 
day  in  the  U.S.Aviation  service — and  still  render  efficient  and  dependable 
performance! 

These  potent  reasons  helped  convince  engineers  of  many  leading 
licensed  set  manufacturers  that  these  same  Raytheon  tubes  are  the  best  for 
their  sets.  Profit  from  the  combined  experience  of  these  men  who  know. 

Choose  Raytheons  for  your  replacements  and  enjoy  greater  perma- 
nent tube  profits! 


"WORLD'S  LARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS'' 


March,  1938 


43 


DELCO  PUSH  BUTTON  TUNER 

(Continued  from  page  39) 
sends  current  through  its  relay  which 
trips   the  station   selector  arm    (relay 
armature). 

The  other  set  on  contacts  sends  cur- 
rent through  the  hold-down  coil  and 
hold-down  relay,  both  of  which  are 
connected  across  the  battery.  The  hold- 
down  coil  keeps  the  push  button  that 
was  depressed  in  the  down  position 
until  the  station  has  been  selected. 

The  hold-down  relay  has  two  sets 
of  contacts,  one  of  which  closes  the 
circuit  to  the  motor  and  the  magnetic 
clutch,  while  the  second  contact  mutes 
the  audio  of  the  set  during  tuning. 

A  single-pole  double-throw  switch  is 
used  for  switching  in  either  the  for- 
ward or  reverse  fields.  This  switcn  is 
operated  by  the  cam  shown  in  the 
lower  left  hand  part  of  the  chart. 

The  cams  (only  one  of  6  shown)  have 
a  high  and  a  low  side  which  serves  to 
govern  the  direction  in  which  the  mo- 
tor rotates.  The  lever  which  is  pulled 
into  contact  with  the  cam  by  the  re- 
lay is  mechanically  connected  to  a  sys- 
tem of  levers  so  that  the  direction  of 
the  motor  is  always  such  that  the  me- 
chanism goes  direct  to  the  desired 
station.  Further  explanation  of  this 
type  of  mechanism  will  be  found  on 
page  42  of  the  October  1937  issue  of 
Radio  Today. 

When  the  motor  has  rotated  the  cam 
to  the  point  where  the  desired  station 
is,  the  lever  will  drop  into  the  notch 
on  the  cam.  Then  the  movement  of 
the  lever  opens  the  stop-start  switch 
thereby  turning  off  the  motor,  de- 
energizing  the  magnetic  clutch,  open- 
ing the  audio  mute  contacts  on  the 
hold-down  relay,  and  de-energizing  the 
hold-down  coil  thereby  permitting  the 
button  to  release  and  assume  normal 
position.     Also   the   lever    (armature) 


Schematic  of  the  electric  push  button  tuner  used  in  the  current  Delco  auto  radio 
sets.    Note  that  the  push  buttons  are  separated  from  the  mechanism  through  the 

the  use  of  relays. 


comes  out  of  the  notch  in  the  cam 
since  the  relay  no  longer  holds  it 
down. 

Set  up  of  stations  is  easily  accom- 
plished without  the  use  of  any  tools. 
The  button  to  be  set  up  is  depressed 
and  the  mechanism  allowed  to  come 
to  a  rest.  Then  button  is  held  down 
and  the  station  is  tuned  in  manually. 
When  the  button  is  held  down  after 
the  mechanism  has  come  to  a  rest,  the 
relay  armature  pawl  is  held  in  the 
cam  slot,  locking  the  cam  in  position. 
The  cam  is  allowed  to  slip  on  its  shaft 
during  the  manual  tuning  process,  by 
a  clutch  spring  which  is  part  of  the 
cam  shaft  assembly. 


WILCOX-GAY  7-TUBE  RECEIVER 

*  The  Wilcox-Gay  A36,  A-37,  7J7, 
7K7  radio  sets  employ  the  same 
chassis,  which  is  a  7-tube  superhet. 

Set  has  a  tuned  R.F.  stage  on  all 
bands  and  uses  separate  coils  which 
are  selected  by  the  wave-band  switch. 
There  are  slight  variations  between 
the  early  late  models  which  are  indi- 
cated on  the  accompanying  schematic 
circuit. 

I.F.  and  R.F.  alignment  of  the  set 
follows  the  usual  procedure.  Trimmer 
locations  are  shown  on  the  chassis 
layout.  (To  page  46) 


WILCOX  GAY  MODELS  A36,  A37,  7J7,  7K7 


0    00® 

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I.F.    PEAK   456  KC 


Out  where  the  test 
begins—miles  from  the 
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formance. T20  and  S19  are  new 
types  for  distributors  and  plugs 
and  can  be  installed  without  tools 
in  a  few  moments'  time.  REC- 
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Successful  servicemen,  learning 
theory  First,  are  never  troubled  by 
circuit  changes  or  complicated 
problems. 


Lse*  ' 
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Tung-sol  knows  that  nothing  any 
manufacturer  can  do  will  enable 
dealers  to  "get  rich"  through  the  sale 
of  radio  tubes.  Tung-Sol  knows,  too, 
that  given  a  fair  opportunity,  the 
dealer  can  make  radio  tubes  one  of 
his  most  profitable  lines.  That  is  why 
the  Tung-Sol  consignment  plan  is 
offered— not  as  a  gold  mine— but  as  a 
sound  merchandising  plan  which  en- 
ables the  dealer  to  make  all  the  profit 
possible  from  the  sale  of  Tubes. 

The  plan  is  simplicity  itself.  An 
adequate  stock  of  Tung-Sol  depend- 
able tubes  is  placed  in  your  custody. 
Once  a  month  you  report  and  pay  for 
the  tubes  sold.  Capital  ordinarily  tied 
up  in  tubes  then  becomes  available 
for  investment  in  other  merchandise. 
Furthermore,  you  are  protected  from 
cut-price  competition  as  well  as 
losses  due  to  obsolescence  or  price 
reductions. 

It  you  are  a  responsible  dealer,  equipped 
to  service  radio,  you  will  want  the  de- 
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"Oana-f  Lout  Radioc3ui>e£. 

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Dept.  C         Radio  Tube  Division 

SALES  OFFICES:  ATLANTA   •    BOSTON   •   CHICAGO   •   DALLAS 

KANSAS  CITY   •   LOS  ANGELES   •   DETROIT   •    NEW  YORK 

GENERAL  OFFICES.  NEWARK,  N.J. 


March,  1938 


45 


MORE  SERVICE  NOTES 


out  very  well.  It  has  enabled  the 
members  to  obtain  service  contracts 
which  no  individual  member  could 
handle  alone.  Exchange  of  informa- 
tion and  group  buying  has  also  proven 
very  beneficial. 


BELMONT  MODELS  761  &  860 

■*  The  Belmont  models  761  and 
860  are  from  a  circuit  viewpoint  alike 
except  that  the  860  has  a  cathode  ray 
tuning  indicator.  Actually  the  two 
receivers  employ  somewhat  different 
tuning  mechanisms. 

Set  uses  a  3-gang  condenser  which 
provides  from  pre-selector  antenna 
stage  on  the  broadcast  band.  On  the 
short-wave  bands  the  set  is  a  2-gang 
job  employing  a  doublet  type  antenna 
system  which  is  automatically  switched 
in  by  the  band  switch. 

The  1st  detector  coil  system  is  of 
the  usual  series  type  where  the  coils 
for  the  lower  frequencies  are  shorted 
out  progressively  as  the  band  is 
changed.  The  coil  system  in  the  os- 
cillator circuit  is  somewhat  different. 
First  of  all  for  the  BC  band,  the  SW 
and  BC  coils  are  in  series  and  POL 
coil  is  out  of  the  circuit  from  an  in- 
ductance point  of  view.  However, 
the  BC  parallel  trimmer  is  in  series 
with  the  POL  coil  and  trimmer.  The 
series  trimmer  capacity  is  the  result- 
ant of  all  the  series  condensers. 

On  the  POL  band,  the  POL  and  BC 
secondary  oscillator  coils  are  in  par- 
allel. On  the  SW  band  the  BC  and 
POL  coils  are  shorted.  Also  the  BC 
and  POL  series  padders  are  shorted. 
Consequently  for  short  wave  the  os- 
cillator circuit  is  reduced  to  the  SW 
coils   and   the   .003    series   condensers. 


Because  of  the  interlocking  trim- 
mers, alignment  must  be  made  def- 
initely in  the  following  order — BC 
band,  SW  band,  POL  band.  First  the 
oscillator  parallel  trimmer  is  adjusted, 
then  the  1st  detector,  and  then  the 
series  padder   (BC  band  only). 

Frequencies  and  location  of  the 
trimmers  is  given  in  the  auxiliary 
chart  shown  on  the  accompanying 
schematic. 


AUTO  RADIO  SERVICE  ASS'N 

*  In  metropolitan  New  York  and 
New  Jersey  a  group  of  10  auto-radio 
stations  have  formed  what  is  known 
as  United  Auto  Radio  Service.  The 
purpose  of  this  organization,  declares 
M.  M.  McCullough  of  MacAdams 
Equipment,  New  York  City,  is  to  bene- 
fit the  individual  members  by  group 
co-operation.  This  includes  purchas- 
ing, standardizing  policies,  and  co- 
operative service  to  dealers  and  cus- 
tomers. 

As  an  example,  a  Guarantee  Cer- 
tificate is  given  customers  having  a 
car  radio  installed  by  a  member  sta- 
tion which  entitles  the  owner  to  ob- 
tain "No  Charge"  service  at  any  other 
member  station,  during  the  90-day 
warranty  period,  assuring  prompt, 
convenient  service. 

The  association  has  been  in  opera- 
tion for  about  a  year  and  is  working 


DE  LUXE  RADIO  INSTALLATION 

+  Radiomen  should  contact  the 
architects  who  are  planning  large 
homes  for  wealthy  individuals,  accord- 
ing to  Jensen  Radio  Mfg.  Co.,  who  tell 
us  that  Philip  Greeley  of  Washington, 
D.  C,  has  just  completed  extensive 
radio  installation  calling  for  simul- 
taneous five-channel  operation  through- 
out the  house. 

Usually  these  jobs  are  overlooked  by 
servicemen.  But  every  home  construc- 
tion job  from  about  ?25,000  up  is  a 
prospect  for  a  custom  radio  installa- 
tion. The  radioman  must  approach 
the  architect  and  person  who  is  to 
own  the  home,  and  sell  them  on  the 
idea   before   construction   is   complete. 

The  home  which  Greeley  installed 
his  radio  system  cost  about  $300,000 
which  is  several  hundred  times  the 
cost  of  the  radio  set-up. 

In  order  to  provide  for  reception 
of  any  one  of  five  channels  at  19 
speaker  locations  it  is  necessary  to 
use  five  tuners  and  five  amplifiers.  To 
insure  high-fidelity  reception  tuned 
radio  frequency  tuners  are  employed 
feeding  2A3  amplifiers,  each  having 
its  separate  power  supply. 

A  5-pair  transmission  line  connects 
the  output  of  each  amplifier  to  the 
station  selector  switch  at  each  speaker 
location.  And  to  match  the  line,  a 
speaker  transformer  is  used  at  each 
remote    location.      Volume    control    is 


BELMONT  MODELS  761  &  860 
Series  A 


6K7 

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ONLY  THIS  NEW 
WESTON  OSCILLATOR 

gives  you  ALL  these  features! 

Constant  signal  level  at  all  frequencies  (A.  A.C.) 
.  .  .  Constant  frequencies— no  padders—  no 
trimmers  .  .  .  Guaranteed  accuracy  at  all  fre- 
quencies Q4%  on  I.F.—  B.C.)— (1%  on  Short 
Wave)  .  .  .  Constant  impedance  attenuator 
(100  ohms)  . . .  Permanent  hand  calibration- 
large  330°  fully  visible  dial . . .  Output  readings 
directly  in  microvolts   .   .   .  Signal  strength 
i  lOO.OOOmicrovolts. .  .Fundamental  frequencies 

fifty  kc— 30  meg.— 6  individually  hand  cali- 
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March,  1938 


47 


Now  you  can  test 

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6V.  VIBRATORS 


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Locate  Service  Troubles  Quickly  .     . 

Sell  More   Vibrators 

•  Tests  All  Types  6  V.  Vibrators 

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•  Uses  Approved  500  Ohms  Load 

This  new  Triplett  Vibrator  Tester  has  been  constructed 
with  the  engineering  cooperation  of  leadina  manufac- 
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(6  volts)  as  used  in  automotive  and  home  battery 
receivers.  A  load  of  5000  ohms  recommended  by  vi- 
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the  following:  0-10  volt  scale  shows  voltage  input  to 
the  vihrator;  the  GOOD-BAD  scale  shows  output;  scale 
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Black  Wrinkle  Finish  .  .  .  Attractive 
Etched    Panel.  CfA    AA 

DEALER    NET iftit.VV 

Model  1070  in  Portable  Leatherette  Case 
with  Removable  Cover  and  Compart- 
ment for  Accessories.  €9Q  iiti 
DEALER    1VET l^fiO.UU 


See  Your  Jobber 


Write  for  More  Information 


pAecuwn 

ELECTRICAL     INSTRUMENTS 

The    Triplett    Electrical    Instrument    Co. 
193    Harmon    Dr.,    Bluffton,    Ohio 

Please   send   me 

□  Complete    Catalon 

Name     

Address     

City State 


MORE  PROFITS  FROM  SERVICING 


Custom    radio    installations    often    re- 
quire the  use  of  built-in  speakers. 

effected  by  a  constant  impedance  at- 
tenuator in  the  voice  coil  circuit. 

Speaker  equipment  is  comprised  of 
4  A-12  Jensen  dynamics  and  15  PM- 
8-C  units.  Specially  designed  grilles 
are  used  to  cover  the  speakers  which 
are  mounted  flush  with  the  walls  as 
shown  in  the  accompanying  illus- 
tration. 

While  such  complete  installations 
are  relatively  few  in  number,  sales- 
minded  radiomen  should  not  pass 
them  up  for  the  profits  are  correspond- 
ingly greater.  And  one  installation 
always  leads  to  another — for  "keeping 
up  with  the  Joneses"  is  always  popu- 
lar sport  among  the  rich. 


AUDIO  AVC  CONTROL 

+  In  some  of  the  early  Stromberg- 
Carlson  sets  in  the  20  series,  an  un- 
usual form  of  AVC  circuit  was  used. 
Several  requests  from  readers  have 
prompted  us  to  explain  this  system 
of  AVC,  which  is  illustrated  in  the 
accompanying  diagram. 

First  of  all  a  triode  type  tube  is 
onerated  as  a  dual  diode  in  a  delaved 
AVC  circuit  and  audio  detector.  The 
cathode  and  grid  are  used  as  the  ele- 
ments of  the  detector  circuit  for  pro- 
viding an  audio  signal. 

Note  that  the  cathode  goes  to  the 
hot  side  of  the  coil.  Going  back  to 
the  theory  of  the  vacuum  tube,  we 
recall  that  current  will  flow  only  when 
the  plate  is  positive  with  respect  to 
the  cathode.  In  this  instance  the  grid 
can  be  regarded  as  the  diode  plate. 

The  incoming  I.F.  signal  is  an  AC 
wave  which  has  both  positive  and 
negative  peaks.  Now  when  the  wave 
is  negative  the  cathode  instantane- 
ously becomes  negative  with  respect 
to  the  plate.  Therefore  a  diode  cur- 
rent flows  through  the  detector  load 
resistor  of  250.000  ohms — in  other 
words,  the  negative  part  of  the  wave 
is  rectified  or  detected. 

In  the  usual  form  of  diode  detector, 
the  plate  is  connected  to  the  hot  side 
of  the  coil  and  positive  part  of  the 
wave  is  rectified.  In  these  S-C  models, 
just  the  opposite  is  true. 

Now  the  audio  signal  across  the  de- 
tector   diode    load    is    applied    to    the 


plate  of  the  tube  through  a  .04  mfd. 
condenser  (some  models  .1  mfd.).  Con- 
sidering only  the  plate  and  cathode  of 
the  tube,  it  will  be  noticed  that  the 
cathode  is  12%  volts  positive  with 
respect  to  the  plate.  No  plate  current 
will  flow,  consequently,  until  the  plate 
is  more  than  12%  positive. 

When  the  positive  peak  of  the  audio 
signal  across  the  detector  diode  load 
resistor  exceeds  12%  volts,  a  current 
will  flow  from  the  plate  to  cathode 
through  the  500,000  ohm  AVC  load 
resistor.  As  is  always  the  case  with 
usual  diode  rectifiers,  the  rectified 
voltage  is  negative  with  respect  to 
ground.  Thus  the  plate  and  cathode 
work  similarly  to  the  usual  delayed 
AVC  circuit.  The  one  difference  is 
that  the  audio  voltage  is  rectified  in- 
stead of  I.F.  voltage. 

Therefore  the  volume  output  of  the 
set  will  be  dependent  upon  the  audio 
signal  strength  instead  of  carrier  sig- 
nal strength. 

The  arrow  heads  in  the  diagram 
show  the  path  of  the  audio  signals. 


General  Electric  models         SW  switch 
K50P,  K54P.  K60P,  does   not 

K65P  center 

*  Remove  the  clip  fitted  into 
the  slot  in  the  switch  shaft.  Cut 
a  slot  in  the  end  of  the  shaft  and 
solder  a  floor  nail  into  it.  Now  when 
the  switch  is  turned  the  nail  will 
fall  against  either  one  or  the  other 
side  of  the  protruding  bakelite  wall, 
holding  the  switch  in  place  in  either 
position. 


Grunow  models  Interference  from 

701,  801,  901  airport   beacons 

*  Realign  the  i-f  at  a  new  fre- 
quency say  2  55  or  270  Kc.  This 
calls  for  complete  realignment  of 
the  r-f  and  oscillator  systems.  An- 
other method  is  to  obtain  an  old  i-f 
transformer  designed  for  an  i-f  of 
2  60  Kc.  or  262  Kc,  and  place  either 
the  primary  or  secondary  in  series 
with  the  antenna.  The  trimmer 
across  this  section  of  the  transform- 
er can  then  be  adjusted  until  the 
interfering  signals  are  cut  out. 


AVC    and    2nd    detector    circuit    em- 
ployed in  early  Stromberg  sets. 


48 


Radio  Today 


RCA  PUSH  BUTTON 
TRIMMER  TUNING 

*  In  the  larger  type  RCA  sets 
using  trimmer  type  tuning  for  push 
button  operation,  the  change  over 
from  manual  to  PB  tuning  is  accom- 
plished by  the  wave-change  switch. 


Illustrated  in  the  accompanying- 
chart,  is  the  circuit  employed  in  these 
sets.  Switch  is  shown  in  push  but- 
ton position.  Note  that  in  the  1st 
detector,  trimmer  condensors  are  sub- 
stituted for  the  condenser  gang.  In 
all  other  positions  the  variable  gang 
condenser  is  used. 

In  the  oscillator  circuit,  trimmer 
type  inductances  with  iron  cores  are 
used  in  place  of  the  usual  BC  coil. 
A  fixed  condenser  is  used  for  resona- 
ting the  circuit.  The  switch  in  the 
PB  position  cuts  in  the  trimmer  in- 
ductances which  are  connected  across 
coil  which  is  inductively  coupled  to 
the  anode  coil  of  the  oscillator  tube. 
Adjustment  of  the  oscillator  stage  is 
made  by  varying  the  position  of  the 
iron  cores. 

ALLOW  SET  TO  HEAT 

*  Alignment  or  set-up  of  the  new 
automatic  and  push-button  receivers 
should  not  take  place  until  the  set 
has  operated  at  least  20  minutes,  ac- 
cording to  many  of  the  manufactur- 
ers. Beason  being  that  set  tuning 
drifts  considerably  the  first  few  min- 
utes, and  if  the  push  buttons  are  set 
up  before  the  drift  is  complete,  the 
tuning  will  not  be  perfect  after  the 
set  has  heated  up.  Even  if  the  set 
uses  A.F.C.,  it  is  necessary  to  allow 
all  the  parts  to  reach  operating  tem- 
perature before  setting  up. 


THORDARSON  AMPLIFIERS 


NEW 

Solid  Walnut  Cabinet 
Illuminated  Dials 
Protected  Controls 
Window  Visibility  Dials 
Low  Distortion  at  all  audible 
frequencies 


DESIGN  APPEAL 
CONSTRUCTION 
PERFORMANCE 

•  Dual  Tone  Control 

•  Multiple  inputs  with  individual 
controls 

•  Universal  output  impedance 
selected  by  convenient  "plug-in" 
connectors 


Spectacular  is  the  word  which  best  describes  the  many  features  of  these 
new  amplifiers.  Spectacular  is  the  word  which  best  describes  their  recent 
announcement  by  nationwide  "Telephone  Broadcast"  to  the  trade  in 
principal  cities  all  over  the  country.  Spectacular  is  the  word  which  best 
describes  the  new  sales  appeal  of  this  line.  Check  the  features  above  and 
see  just  how  much  Thordarson  amplifiers  give  you  to  sell.  Be  the  first  in 
your  territory  with  the  latest,  in  fact  most  advanced,  amplifier  on  the  market. 

Engineered— Styled— Modernized 

"They  Speak  for  Themselves" 

See    your    jobber    or    write    the    factory   direct  for  new  FREE  Catalog  No.  600-C. 

AMPLIFIER   DIVISION   OF 


THORDARSON  ELECTRIC  MFG.  CO. 

500  W.  HURON  ST.,  CHICAGO,  ILL. 


March,  1938 


49 


LEARN  ABOUT  RADIART'S 
NEW 


RADIART  AERIALS 
BETTER  AERIALS 

The  anti-Rattler  (Patent  Applied  for) 
which  at  last  quiets  that  maddening 
noise  of  long  telescopic  aerials,  is 
just  the  most  recent  of  Radiart's 
unique  auto  aerial  improvements. 
The  styling  —  the  positive  contacts  — 
the  one-man  installation  —  the  GUAR- 
ANTY against  rust,  tarnish  or  cor- 
rosion —  WRITE  for  new  folder  that 
tells  the  story  of  Radiart  quality  and 
profit. 

THE   RADIART   CORP. 

DEPT.  A.,  CLEVELAND,  O.,  MAKERS  OF 

RADIART   VIBRATORS 


It's  RADIART 

for  AERIALS  in  '38 


*  T  O  &  * 


S  E        U    V    E    R    T  a»'  ■*"? 


utlH%or  PubUC    atr  ^es  atrTe  votld-     Are(1uite- 

'  Del*-  R'2V"     .  ,5  MJa'^'nUice 

eectf|C  in0  to  *""".»    cUf 

SlW^S*  or  ^tefse„d   W 
,en At i   control- 


Convention  Time,  Too! 


Starting  Tuesday  morning,  June  7,  and  continuing  through 

Saturday  evening,  June   11,  the  Stevens  Hotel,  in  Chicago, 

will   fairly   radiate   with  radio   industry   activity. 

CONVENTIONS   SCHEDULED 

At  The  Time   Of  The 

1938   NATIONAL  RADIO   PARTS    TRADE   SHOW 

Are  Listed  Below: 

RADIO   MANUFACTURERS   ASSOCIATION 

SALES  MANAGERS  CLUB  "REPRESENTATIVES" 

RADIO  SERVICEMEN  OF  AMERICA 

NAT'L  ASSN.  OF  RADIO  PARTS  DISTRIBUTORS 


B  C-N  U 


RADIO  PARTS  CITY 

STEVENS  HOTEL  —   CHICAGO 

June  8,9,10  and  11,1938 


RADIO  PARTS  MANUFACTURERS  NATIONAL  TRADE  SHOW 

53  WEST  JACKSON  BOULEVARD CHICAGO.ILLINOIS 


50 


Radio  Today 


MORE  SERVICE  DATA 


ELECTROLYTIC  CONDENSER  COLOR 
CODE  FOR  FAIRBANKS-MORSE 
1938  SETS 

*  With  the  positive  (+)  or  center 
solder  lug  toward  you,  read  the  col- 
ored markings  as  follows  from  left 
to  right. 

Left  Hand  or  Capacity   Color 

Black    0  to     9  mfd. 

Brown  9  to  19  mfd. 

Bed    19  to  29  mfd. 

Orange    29  to  39  mfd. 

Yellow    39  to  49  mfd. 

Second  From  Left  or  Maximum 
Voltage  Color 

Black    0  to     99  volts 

Brown 99  to  199  volts 

Bed   199  to  299  volts 

Orange    299  to  399  volts 

Yellow    399  to  499  volts 

Green    499  to  599  volts 

If  a  third  (blue)  stripe  is  shown, 
the  condenser  is  a  regulator  and 
should  be  in  the  position  farthest 
from  the  rectifier  tube  in  the  filter 
circuit. 

MICA  VIBRATOR  CONDENSER 
REPLACEMENT 

*  An  ingenious  replacement  for 
the  vibrator  two-section  condensers 
consist  of  two  "postage  stamp"  bake- 
lite-molded  mica  condensers  held  to- 
gether by  twisting  together  and 
solder-dipping  two  of  their  leads  to 
form  one  terminal,  while  the  remain- 
ing two  leads  provide  the  other  two 
terminals.  In  fact,  these  condensers 
are  similar  to  those  made  for  a  man- 
ufacturer whose  specifications  call 
for   2500-volt  AC   test.     The   handy 


combination  designed  for  replacement 
in  Motorola  65  and  70  sets  provides 
the  superior  characteristics  of  mica 
condensers  to  withstand  the  vibration, 
heat  and  humidity  of  usual  vibrator 
service,  in  place  of  the  usual  paper 
unit,  and  is  actually  lower  in  cost 
than  the  customary  paper  replace- 
ment, states  Aerovox  Corp.,  who  are 
manufacturing  the  units. 

AUTO  SIGN  GETS  BUSINESS 

*  A  horizontal-type  yellow-and- 
blue  cardboard  "Badio  Service"  sign 
about  14  inches  long  by  5  inches 
high,  can  be  made  up  for  auto- 
mobile use.  The  card  is  set  on  the 
ledge  inside  the  rear  window  while 
driving  so  as  to  be  readable  from  the 
rear.  While  parked  on  a  service  call 
or  other  business,  it  can  be  set  in  the 
windshield  or  side  window  of  the  front 
seat.  Often  its  use,  while  the  car  is 
parked,  leads  to  inquiries  and  further 
service  work.  It  also  acts  as  a  protec- 
tion against  objection  to  parking, 
since  the  policeman  or  traffic  officer 
knows  the  business  of  the  driver  and 
usually  extends  friendly  cooperation 
which  leads  to  still  more  service  busi- 
ness. 

Kolster-Brandes  Low   volume 

models    Bl  5,    Bl  6 

*  When  this  trouble  is  expe- 
rienced, it  is  a  good  plan  to  take  no 
chances  with  the  grid  resistors,  but 
to  replace  them  with  new  3,000  ohm 
units.  For  best  results  use  wire 
wound   units. 

Echophone   model  S5  Dead 

*  First  remove  the  cardboard 
cover  from  the  coils  at  the  end  of 
the  chassis.  Next,  move  the  coils 
close  together,  making  sure  to  keep 
them  at  90  degrees  angle  with  re- 
spect to  each  other. 


Down  payments  in  the  Arcturus  Deal 
are  without  question  the  lowest  ever 
offered  —  as  low  as  $3.00  in  some 
cas^s!  On  an  average  you  pay  only 
about  ONE-SIXTH  the  amounts 
required  by  other  deals  !  This  means 
an  actual  cash  saving  to  you. 

AND  REMEMBER  THIS  IMPORTANT 
POINT:  Under  the  Arcturus  Equipment 
Deal  not  one  cent  has  been  added  to  our 
regular  tube  prices.  You  buy  standard 
tubes  at  STANDARD  PRICES,  less  stand- 
ard discounts.  To  pay  more  than  these 
standard  prices  on  a  deal  probably  means 
you  are  actually  paying  cash  for  the 
equipment.  Think  it  overl  Remember, 
also,  that  the  Arcturus  plan  is  still  further 
geared  to  your  needs  in  that  required 
tube  purchases  are  surprisingly  low. 

EXTRA   PROFIT    FOR   YOU! 

In  short,  the  AHCTURUS  EQUIPMENT 
DEAL  brings  you  the  opportunity  of  a 
lifetime  to  modernize  your  shop  with  the 
latest  standard  equipment — at  almost  no 
cost  to  you.  You  obtain  possession  of  the 
equipment  IMMEDIATELY — and  finance  it 
by  your  purchases  of  Radio's  finest,  best 
-^gineered  tubes.  Thus  you  profit  twice 
every  tube  you  sell.    You  can'flosel 

MAIL  THE  COUPON 

NOW! 


ARCTURUS 


Neat,  orderly  shop  of  A.  J.  Davis,  Waukesha,  Wis.,  almost  doubles 

his   efficiency.     And   to  illustrate   that   point   RADIO   TODAY   has 

shown  Mr.  Davis  twice. 


ARCTURUS  RADIO  TUBE  CO.,   Newark,  N.  J.  T-6 

Without    cost    or    obligation    on    my    part/ 
send   details  of  your  new  equipment  deal. 

Name    

Street    

City 

□  I  am  a   dealer 

My    Jobber    is 

For  yoHT  convenience  this  coupon  ean  be  pasted  on  3  penny  postcard 


State 

fj  I   am  a  serviceman 


March,   1938 


51 


. . .  "climatic  conditions  here 
are  severe  .  .  .  our  8-month 
rainy  season  plays  havoc 
with  radios.  Since  changing 
to  Centralab  we  have  re- 
placed only  three  controls. 
Centralab  is  the  remedy  to 
our  troubles  in  the  way  of 
''comebacks',  and  we  recom- 
mend them  100  per  cent." 
H.  H.  WRIGHT 

Gen.  Mgr. 
DAY   &    NIGHT   GARAGE    CORP. 
Panama   City,  Rep.  of  Panama 

• 

Down  in  Panama  City  where 
Mr.  Wright  is  manager  of 
the  DAY  AND  NIGHT  GAR- 
AGE CORP.  it  rains  8 
months  in  the  year  .  .  . 
and  the  hu- 
midity plays 
havoc  with 
r  a  d  i  o  s . 
That's  why 
Old  Man 
Centralah  i  s 
happy  to 
quote  from 
Mr.  Wright's 
letter. 

Get  the  Centralab 
Volume  Control  Guide 


Centsalab 


Milwaukee,  Wis, 

Division  of  Globe  Union,   Inc. 

BRITISH    CELTRALAB,    Ltd. 

Canterbury    Road,     Kilburn 

London,  N.W.6,  England 

FRENCH    CENTRALAB    CO. 

118    Avenue    Ledru-Rollin 

Paris  XI,  France 


RSA  REPORTS  ITS  MEMBER- 
SHIP PROGRESS 

*  We  have  now  affiliated  twenty- 
four  local  chapters  in  all  parts  of 
the  country.  Twelve  petitions  for 
affiliation  from  twelve  additional 
local  groups  are  on  file  in  the  na- 
tional office  at  the  present  time. 

The  first  issue  of  our  house  organ 
as  well  as  the  advance  circuit  dia- 
grams on  the  Zenith  radios  went 
forward  to  our  members  on  Febru- 
ary 28,  1938. 

The  RSA  wishes  to  take  this 
means  of  thanking  Radio  Today  for 
its  splendid  efforts  in  behalf  of  the 
organization. 

Chapter  news 

Freeport — Don  Stover  and  S.  A. 
Frank  were  chosen  for  nominees 
for  District  10.  Local  dues  were 
increased  to  $5.00  a  year — this 
sum  to  include  national  dues  and 
a  one  year's  subscription  to  a 
trade  publication. 

Flint — The  Flint  Chapter  is 
celebrating  its  first  year  of  exist- 
ence and  its  affiliation  with  RSA, 
with  a  dinner  and  dance. 

A  membership  drive  got  under 
way  at  the  last  meeting  at  which 
time  the  following  officers  were 
elected  for  1938:  Pres.,  Worden 
Stiles;  Vice-Pres.,  Harold  Wilke; 
Sec'y,  James  Pugh;  Tieas.,  Walter 
Mudge. 

Biiighamton — John  Rose  was 
nominated  for  the  office  of  direc- 
tor from  District  19  at  the  first 
meeting  held  in  February. 

Metropolitan  N.  Y. — Meetings 
are  held  the  second  and  fourth 
Monday  of  each  month  at  the  Ho- 
tel Victoria.  A  telephone  has  been 
installed  in  the  name  of  RSA  in 
downtown  New  York,  for  the  con- 
venience of  members  and  other 
interested  parties. 

The  Technical  Meetings  are  un- 
der the  direct  supervision  of  Ed 
Mandeville.  The  Chapter  officers 
are:  Chairman,  George  Duvall; 
Sec'y,  Selig  Rosengarten;  Treas., 
J.  J.  Gonoud. 

Manchester,  N.  H. — At  a  meet- 
ing of  the  Assn.  of  Radio  Techni- 
cians, Chapter  of  RSA,  held  on 
February  1,  1938,  a  new  constitu- 
tion was  submitted  and  accepted. 

An  interesting  open  forum  was 
held  on  several  subjects  pertain- 
ing to  radio  at  a  meeting  held 
February  15,  1938.  Advertising 
was  discussed  and  plans  laid  out 
to  conduct  a  regular  cooperative 
advertising  campaign  starting  in 
the  late  summer  and  early  fall. 


*  Radio  and  appliance  dealers 
of  New  Jersey  have  associated  them- 
selves in  a  new  type  of  organiza- 
tion, the  Radio  Electric  Appliance 
League,  "combining  the  buying 
power  of  the  chains,  the  personal 
service  of  the  neighborhood  store, 
with  the  combined  skill  of  a  hun- 
dred or  more  alert  dealers  in  sales 


promotion  and  merchandising." 
Membership  is  by  invitation  only. 
Officers  are  Harold  Veith,  Franklin 
Furniture  Co.,  Englewood,  N.  J., 
president;  Edward  Gilsenan,  Gilse- 
nan Piano  Co.,  Union  City,  N.  J. 
vice-president;  William  Kuss,  Kuss 
Bros.,  Hackensack,  N.  J.,  secretary; 
and  C.  W.  Perdue,  Perdue  Radio 
Co.,  Inc.,  Montclair,  N.  J.,  treasurer. 
Managing  director  is  H.  L.  M. 
Capron.  48  Overlook  Road,  Verona, 
N.  J. 


■*•  Emerson  Radio  &  Phonograph 
Co.  are  cooperating  with  Procter  & 
Gamble  by  awarding  40  radios  as 
daily  prizes,  for  a  period  of  30  days, 
in  a  huge  nation-wide  contest  start- 
ing Mar.  28th  on  Camay  soap.  Coast 
to  coast  broadcasts,  color  pages  in 
leading  magazines,  300,000  grocery 
store  displays,  and  $1,000  daily  cash 
prizes  are  parts  of  the  stunt.  Em- 
erson model  selected  is  the  AM-169, 
6-tube  AC-DC  superhet. 


DEALERS  GET  TOGETHER 
NATIONALLY 

■*■  First  national  meeting  to  be 
held  in  connection  with  the  forma- 
tion of  a  National  Association  of 
Radio  and  Appliance  Dealers  is  set 
for  Mar.  21  at  the  Hotel  Commo- 
dore, New  York  City.  The  conclave 
opens  at  9  a.m.  and  will  include  a 
special  program  and  dinner  at  7 
p.m.  It  is  expected  that  some  50 
different  U.  S.  cities  will  send  rep- 
resentatives of  their  respective 
electrical  associations,  and  that 
guests  will  number  between  300 
and  400. 

Arrangements  are  being  made  by 
an  organization  committee  of 
which  Russell  A.  Atkinson,  4  Ralph 
Ave.,  Brooklyn,  N.  Y.,  is  chairman. 
Reservations  must  be  made  by 
Sunday,  Mar.  20. 

SUCCESSFUL  SALES 
ENGINEER  WANTED 

*  One  of  the  largest  manufac- 
turers in  the  radio  accessory  field 
has  an  opening  for  an  experienced 
radio  sales  engineer.  The  man 
wanted  must  be  acquainted  with  all 
phases  of  the  industry.  Ability  to 
do  contact  work  essential.  For  the 
man  who  qualifies,  the  position  of- 
fers unusual  opportunity  for  a  per- 
manent and  profitable  connection. 
Write  fully  of  your  qualifications 
and  experience.  All  correspondence 
strictly  confidential.  Address  Box 
123,  Radio  Today,  480  Lexington 
Ave.,  New  York,  N.  Y. 


MINICAM  MAGNET 


*  Bright  new  display  for  the 
"Minicam"  camera  is  forthcoming 
from  Universal  Camera  Corp.,  32 
W.  23rd  St.,  New  York  City.  De- 
signed for  window  or  counter  use 
and  featuring  the  low  price  of  the 
product,  the  display  is  free  to  deal- 
ers. It  has  a  place  to  attach  an 
actual  camera. 


52 


Radio  Today 


APPLIANCES 

(From  page  40) 
Goodman  turntable  displays 


*  A  whirling  device  for  displaying 
small  appliances  and  radio  items. 
Turntables  come  with  triple-tray 
superstructure  of  heavy  gauge  metal 
9,  12  and  15  in.  in  diameter.  Over- 
all height  23  in.;  can  be  taken  down 
in  sections.  AC  motor  operated,  car- 
rying loads  up  to  75  lbs.;  does  not 
burn  out  if  overloaded  or  stalled.  Has 
three  moving  parts,  self-lubricated  No 
radio  interference;  daily  operation  cost 
estimated  at  lc.  With  superstructure, 
$20.00;  without,  J17.50.  Goodman's  Ro- 
tary Radio  Display  Specialties,  19  W. 
34th  St.,  New  York.  N.  Y. — Radio  To- 
day— see  also  advt.  p.  64. 


Beverage  and  beverage-food 
coolers 


*  Pelco  line  for  hotels,  restaurants, 
dairies,  bowling  alleys,  lunch  rooms, 
etc.,  includes  two  beverage  coolers  and 
two  beverage-food  coolers.  Latter  mod- 
els are  represented  here  by  Model  112, 
with  beverage  compartment  and  re- 
frigerator chamber  below  it.  All  mod- 
els operate  on  "floating  ice"  principle, 
which  means  that  a  freezing  cycle 
forms  ice  on  the  walls,  and  an  "off" 
cycle  allows  the  ice  to  break  away  and 
float.  Thermostatically  controlled. 
Finished  in  red  baked  enamel.  No 
installation  except  plug-in  to  light 
socket.  Refrigeration  Division,  The 
Portable  Elevator  Mfg.  Co.,  Blooming- 
ton,  111. — Radio  Today. 


Auto  Radios  For  1938 
by  TRAV-LER 

These  new  7-Tube  Trav-ler  models  have  full  8  watts  power 
output.  Sensitivity  is  1.5  microvolts  at  one  watt  output.  Has 
full  A.V.C.  and  three-gang  variable  condenser.  Has  the  very 
latest   features   including   iron   core   coils. 


iis*£ 


7-TUBE  AUTO  SET  with  external  S  in.  elec- 
tro   dynamic    speaker — Model    711 — Price 

7-TUBE  RADIO  with  self-contained  6\/2  in. 
electro  dynamic  speaker — Model  710— Price 


r0K 

RADIO 

$59.95 
$49.95 


The  Trav-Ler  Electric  Automatic  Tuning 
Unit  is  simple  and  accurate.  No  drift  or 
backlash — instantly  set  up  from  the 
driver's  seat  without  tools — any  station 
on  any  button — 6  buttons — motor  driven. 
Mounting  holes  provided  for 
easy    installation.      Price 


TRAV-LER  RADIO  &  TELEVISION  CORP 


1036   WEST   VAN   BUREN   ST.,   CHICAGO,   ILL 

AC    AND    AC-DC    HOME    SETS  i&s  AUTO    SETS  U?>  BATTERY    SETS 


$17.95 
1958 


77 


77 


FREE  EQUIPMENT 

given  with  purchases  of 

NATIONAL  UNION 


Radio  Tubes  and  Condensers 

KEEPS  THOUSANDS  OF 
SERVICE    ENGINEERS 

AT  THE  HEAD  OF  THE 
PROFIT  PARADE! 


•  You  can  be  up  in  the  front  lines  for  more  business, 
more  profits,  too.  You  have  to  be  well  equipped  to 
do  it  though.  You  need  testers,  analyzers,  circuit 
data,  technical  information!  These  things  would  cost 
you  lots  of  money  if  you  had  to  buy  them.  Fortunately, 
you  don't  .  .  .  you  can  get  them  Free  the  Easy  Na- 
tional Union  way.  Here's  all  you  have  to  do.  Select 
what  you  need.  Contract  to  purchase  National  Union 
radio  tubes  and/or  condensers — make  a  small  deposit 
which  is  refunded  when  your  purchase  contract  is 
complete.  You  get  the  equipment  right  away  .  .  . 
use  it  while  you  complete  your  purchases  .  .  .  then, 
it's  yours  free  and  clear.  Easy  .  .  .  isn't  it?  Why  not 
start   on   the   N.U.   free   equipment  plan.    .   .    .   Now? 

N.U.  TUBES   and   CONDENSERS   are 
QUALITY  PRODUCTS 

•  Thousands  of  top  notchers  in  the  Radio  Service  En- 
gineering profession  are  depending  on  National  Union 
quality.  It's  the  kind  of  precision  and  value  that 
makes  good  friends  for  you.  National  Union  quality 
will  never  let  you  down.  .  .  .  The  National  Union  guar- 
antee is  your  assurance. 


NATIONAL    UNION    RADIO    CORPORATION        KT-33S 
570  Lexinatcn  Avenue 
New  York  City 

Who  is  the  nearest   N.U.   distributor? 


i    \ime 

1 

■   Address    ! 

i 

!  City 

1 

State i 

! 

March,  1938 


53 


Two  Tube  Checkers  In  One! 


II 


OUALITY  STANDARD 
OF  THE  RADIO 
INDUSTRY 


FREE 

COURSE  IN 
VISUAL  SERVICE 
WITH  ANY  C-B  UNIT 


ACCURATELY  calibrated  against 
L  mutual  conductance  standards  estab- 
lished on  our  master  laboratory  instru- 
ment, the  C-B  Dynastest  2-in-l  Tube 
Checker  affords  most  conclusive  indica- 
tion of  actual  tube  efficiency  attainable 
in  a  checker  of  moderate  cost.  Rapidly 
and  completely  checks  all  tubes  on 
simple  "Good-Bad"  scale,  including 
ballast  tubes  and  rectifiers.  Special  high 
sensitivity  neon  check  for  inter-element 


leakage.  Improved  flexible  switching 
system  anticipates  future  tubes.  New, 
quick-finding,  numerically  indexed,  copy- 
righted, easy-reading  chart  detachably 
mounted  inside  cover,  with  extra  display 
wall  chart.  Handiest  and  most  compact 
instrument  made.  Dimensions,  with  cover 
only  11^2x994x5.  All-steel,  uniweld 
construction,  beautifully  finished  in  C-B 
dark  green,  military  gray,  black  and  sil- 
ver. Cabled  wiring.  Easily  your  best  buy! 


Ejgjgl  The  CLOUGH-BRENGLE  CO.  Egg— 


NEW  BOOKLETS 


*  In  a  new  catalog  400-AX, 
three  transformers  for  use  with  the 
new  Kinescope  television  tubes, 
along  with  three  new  replacement 
type  output  transformers  and  a 
new  modulation  transformer,  are 
announced  by  Thordarson  Electric 
Mfg.  Co.,  500  W.  Huron  St.,  Chi- 
cago, 111.  Copies  are  free  from  job- 
bers or  will  be  mailed  on  request 
from  Chicago.  Company  has  also 
issued  supplement  243S,  a  complete 
listing  of  replacement  transformers 
for  all  1937-1938  broadcast  receiv- 
ers listed  in  Rider's  Volume  VIII, 
free  to  all  registered  Encyclopedia 
owners.  Original  Encyclopedia  plus 
supplement '  is  available  free  from 
jobbers,  or  for  15c  from  Chicago. 

■k  Released  by  "Wholesale  Radio 
Service  Co.,  100  Sixth  Ave.,  New 
York  City,  is  the  new  Spring  and 
Summer  catalog  71,  featuring  new 
Lafayette  receivers,  advanced  PA 
systems,  and  a  new  camera  section. 
Copies  come  from  New  York  or 
from  branch  offices. 

*  A  new  stamp  and  premium 
book  has  been  issued  by  Tilton 
Electric  Corp.,  15  E.  26th  St.,  New 
York  City,  on  Extat  products.  Book- 
let lists  several  dozen  premiums 
available  for  coupons  earned  singly 
for  each  5c  unit  of  purchase. 


NEW  B9  CRYSTAL  MICROPHONE 

A  small,  lightweight,  crystal  microphone,  with  good 
response  and  high  output.  It  is  semi-directional  and 
notably  free  from  feedback.  This  unit  has  a  wide  range 
of  applications,  enhanced  by  the  available  accessories. 
The  B9  is  singular  in  that  it  is  equipped  with  a  plug  at 
the  microphone,  thus  making  cable  replacement  a 
simple  operation.  Chrome  finish.  Complete  with  plug 
and  8'  cable.  Standard  %-27  fitting. 

REQUEST    CATALOG    NO.    27    FOR    COMPLETE    DETAI 

All  crystal  microphones  licensed  under  patents  of  The  Brush  Development  Co. 


List  Price 

$22.50 

8'  cable  and  plus 


LS 


AMERICAN     MICROPHONE     CO.,     INC. 

LOS    ANGELES,    CALIF. 


Janette  Rotary  Converters 

FOR  CONVERTING  DIRECT 
TO    ALTERNATING    CURRENT 

•  Built  in  capacities  from  35  to  3250  volt  amperes 
— with  or  without  all  wave  filters.  Dynamotor  con- 
struction— economical  to  operate — ruggedly  built 
for  years  of  trouble-free  service — used  or  recom- 
mended by  the  largest  manufacturers  of  sound 
apparatus — in  use  in  all  countries  of  the  world — 
Send  for  prices  and  data. 


Jai^ttelUamifecUicuv^eompaiuf 

556-558  litest  llkmeoe  Street  eKicaoo.  UL1L.S..71. 

BOSTON  -  NEW  YORK- PHILADELPHIA  -  CLEVELAND  -  MILWAUKEE  -  IDS  ANGELES 
DETROIT-  SEATTLE 


*  A  new  style  data  book  on  car- 
bon composition  fixed  resistors  has 
been  released  by  Centralab,  99  E. 
Keefe  St.,  Milwaukee,  Wis.  Copies 
will  be  sent  to  those  writing  for 
form  647. 

+  A  special  folder  with  over  160 
replacement  listings  of  motor  start- 
ing capacitors,  by  motor  make  and 
model  number,  will  be  sent  on  re- 
quest by  P.  R.  Mallory  &  Co.,  Inc., 
Indianapolis,  Ind.  The  folder  indi- 
cates what  capacitors  to  use,  tells 
how  to  install,  how  to  test,  etc. 

+  International  Trading  Corp., 
386  Lamington  Road,  Bombay,  In- 
dia, has  issued  a  42-page  catalog  of 
radios,  parts  and  appliances. 

*  Recently  published  by  Philson 
Mfg.  Co.,  Inc.,  156  Chambers  St., 
New  York  City,  is  a  folder  on  auto 
radio  aerials,  including  side  cowl, 
door  hinge,  window  pole,  rear 
bumper,  running  board  and  "Top- 
tenna"  types. 

*  The  David  Bogen  Co.,  663 
Broadway,  New  York  City,  have  3 
new  and  complete  catalogs  of  their 
sound  equipment:  a  16-page  catalog 
of  amplifiers,  complete  sound  sys- 
tems and  public  address  accesso- 
ries; an  8-page  catalog  of  wireless, 
wired  intercommunication  systems 
and  paging  systems;  a  4-page  cata- 
log on  centralized  institutional  pro- 
gram systems  and  school  systems. 
Bogen  Co.  have  also  issued  new 
specification  sheets  on  all  sound 
equipment.  All  material  available 
on  request. 


54 


Radio  Today 


JIM 
QUAM 


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QUAM-NICHOLS  CO. 


33rd  Place  &  Cottage  Grove 
CHICAGO 


1674  Broadway 
NEW  YORK 


Model  600  &  700  Model  500 

SHORT    WAVE    CONVERTERS 
FOR   CAR   RADIOS 

Can  be  attached  to  any  car  radio.  Has  on  and  off 
switch.  Does  not  affect  the  reception  on  the  stand- 
ard broadcast  bands.  MODEL  600 — covers  49,  31, 
25,  20,  19  and  16  meter  bands.  Designed  for  re- 
ception of  American  and  Foreign  short  wave  broad- 
cast. Especially  adapted  to  use  hi  tropical  countries 
and  the  more  remote  parts  of  the  world.  Distance 
range  5000  to  10000  miles.  A  very  attractive  unit. 

List   Price    $24.95 

MODEL  700 — Long  wave  converter  covers  135  to 
410  Kc.  Used  in  U.  S.  to  receive  government 
weather  reports,  ships  at  sea,  etc.,  in  cars  and 
boats  of  the  water  front  districts.  Designed  also 
for  use  in  Europe  and  Asia. 

List  Price $24.95 

For    Use    of    Police    and    Other    Law 

Enforcement  Officers 
MODEL  100 — Police  converter  with  fixed  condenser. 
Covers  1500  to  2600  kilocycles.  List  Price  $11.95 
MODEL  800 — Super  Sensitive  police  converter  with 
fixed  condenser.  Covers  1500  to  2600  kc.  Two 
metal  tubes,  exceptional  distance  range. 

List   Price    $15.95 

MODEL  200 — Police  converter  with  variable  con- 
denser and  illuminated  dial.  Covers  1500  to  5500 

kilocycles.    List  Price    $17.95 

MODEL  500 — Police  converter  with  two  metal 
tubes,  variable  condenser  and  illuminated  dial. 
Very  sensitive.     Exceptional   distance   range.     List 

Price     $21.95 

ALL  WAVE  ANTENNAS— Model  A— Hinge  Mount 

telescopic,  60  in.  long.    List  Price $3.50 

JOBBERS  AND    DEALERS  WANTED 

ABC   RADIO   LABORATORIES 

3334    N.    \ew    Jersey    Street 
Indianapolis,  Indiana,   U.   S.  A. 


AMERICAN  FAIR  TRADE  LEAGUE 

*  Radio  looks  with  genuine  inter- 
est to  a  New  York  City  event  set  for 
April  4- — a  big  testimonial  dinner  to 
be  given  for  U.  S.  Senators  Capper, 
Miller  and  Tydings,  to  celebrate  the 
adoption  of  the  Miller-Tydings  Fair 
Trade  Act,  and  the  passage  of  the  Fair 
Trade  laws  in  42  states. 

To  serve  as  a  clearing  house  for  de- 
tailed information  on  all  the  state  and 
national  laws,  the  American  Fair 
Trade  League  will  be  reorganized  and 
revived  at  this  dinner,  which  is  ex- 
pected to  have  a  guest  list  of  2,000. 

The  American  Fair  Trade  League 
was  founded  25  years  ago  by  Mr.  Jus- 
tice Brandeis  and  William  H.  Inger- 
soll.  The  latter  is  now  a  member  of 
the  organizing  committee,  which  in- 
cludes Russell  A.  Atkinson,  chairman 
of  the  League  of  Metropolitan  Appli- 
ance Retailers. 

*  Hal  P.  Shearer,  president  and 
general  manager  of  the  Connecticut 
Telephone  &  Electric  Corp.  as  well 
as  vice-president  and  general  man- 
ager of  Air  Devices  Corp.,  both  of 
Meriden,  Conn.,  has  purchased  the 
controlling  interest  in  Halson  Radio 
Mfg.  Co.,  Norwalk,  Conn.,  and  will 
move  the  plant  to  Meriden.  The 
new  firm  will  be  known  as  Halson 
Radio  &  Television,  Inc.,  and  will 
start  production  of  long  and  short 
wave  sets  and  television  devices 
about  Mar.  20.  Mr.  Shearer  has 
leased  25,000  sq.  ft.  of  floor  space 
in  an  old  Aeolian  plant  in  Meriden 
to  house  the  Halson  operations.  He 
will  retain  his  highly  successful 
connections  with  the  other  Meriden 
firms  and  dedicates  his  new  project 
to  an  expected  upturn  in  business. 
Charles  and  Phillip  Halpern,  for- 
mer owners  of  the  Halson  company, 
will  be  active,  along  with  Benjamin 
Fox,  chief  engineer. 

•  F.  B.  Connelly  Co.  of  Portland 
and  Seattle  have  been  appointed 
distributors  for  Emerson  in  West- 
ern Washington  and  the  state  of 
Oregon.  Sales  meetings  have  been 
held  recently  with  Charles  Weiser, 
Pacific  Coast  manager  for  Emer- 
son, outlining  his  company's  plans 
for  the  season. 

The  Portland  branch  of  the  Con- 
nelly company  have  moved  into  a 
new  building  (more  than  twice  the 
size  of  the  former  one)  at  835  N.W. 
Flanders  St.  The  firm  now  has 
four  floors  with  all  modern  facili- 
ties, and  assures  its  dealers  of  im- 
proved service. 


©IHIMBT 

Brown  Devils 


Take  the  best  resis- 
tance wire,  wind  it  ac- 
curately on  the  best 
available  ceramic 
forms,  completely  seal 
it  against  moisture  and 
corrosion  with  special  OHMITE 
VITREOUS  ENAMEL  —  that's 
an  OHMITE  BROWN  DEVIL! 
It's  the  simple  story  of  a  per- 
fected design,  conscientiously 
built  to  give  the  ultimate  in  re- 
sistor performance.  Behind  it. 
of  course,  is  a  long  history  of 
painstaking  research  for  the 
6est  in  materials  and  processes. 

Try  OHMITE  BROWN  DEVILS 
now.  In  1  to  100,000  ohm 
units  rated  at  10  and  20  watts 
— they    simply    can't    be    beat! 

See  Your  Jobber  or  Write 
for   Catalog   16. 

OHMITE  MANUFACTURING  CO. 

4847  W.  Flournoy  Ave.       Chicago,  U.  S.  A. 


©HMOT' 

RHEOSTATS     RESISTORS     TAP  SWITCHES 


March,   1938 


55 


"TOKFONE"—  The  1938  Sensation! 


Gives  You  Everything 

PEP  •  PUNCH  •  PRICE 


TOKFONE,   Jr. 

Consisting  of  Master, 
Remote  Station  and 
50  ft.  of  wire. 


TOKFONE,  Jr. 
Remote  Station 


AT 

AMAZINGLY 

LOW  PRICE 


TOKFONE,  Jr. 
Master  Station 


The  Biggest  Buy  in 
Communication  Systems 

NOTHING    CAN    TOUCH    IT! 

GET  YOUR  SHARE! 

•  •CRASH   THIS   FERTILE   MARKET! 

If  you're  in  a  position  to  "CASH-IN"  with  FAST  MOVING- 
LOW  PRICED  intercommunication  systems  then  you  owe  it 
to  yourself  to  get  in  touch  with  REGAL  —  NOW ! 

•  Note   These   Facts!  • 

OTHER  TOKFONE  SYSTEMS — adaptable  to  meet  all  requirements — from  2  to  40  stations — beautifully  hand- 
rubbed  cabinets — NO  PREFERENCES— NO  TRICKS — No  Makeshifts— All  New  Merchandise — Special 
Units  if  Necessary — No  Quotas — No  Contracts — Buy  as  You  Need  Them — Manufactured  in  our  own  factory — 
we  stock  them. 

We  also  Manufacture  P.A.  Equipment  in  the  following  sizes:  6,  12,  15,  30,  60  Watt — Amplifiers — Parts 
used   are:   Aerovox-Thordarson — I.R.C. — Parmet-Rola — Clarostat-Eby  and    Holyoke — Nothino    but   the    best. 

SEND   FOR   CATALOG   SHOWING    COMPLETE   LINE! 
REGAL   AMPLIFIER   MANUFACTURING   CORP. 


14  WEST  17th  STREET 


Cable   address 
"Ramcoamp" 


NEW  YORK  CITY 


DEALER 
PRICE,  Only 

*1980 


Judged  by  the 

number  in  use  .  .  . 

TODAY'S  MOST 

POPULAR 

TUBE  TESTER 

•  HASLINE  VOLTAGE  ADJUST- 
MENT 

•  HAS  LEAKAGE  AND  SHORT 
TEST 

•  USES  TRIPLETT  DIRECT 
READING  INSTRUMENT 
(GOOD-BAD)  SCALE 

Positively  Checks  Radio  Tubes  Accord- 
^m^r^  ing     l"     Latest     Recommendations     <>l 

Tube  Engineers.  Five  flush  type  sock- 
ets provide  for  all  tubes.  The  tester  operation  is  very 
simple  and  indicates  condition  of  the  tube  for  dealer 
and  customer  on  Direct  Reading  (GOOD-BAD)  colored 
scale  of  Triplett  instrument.  Will  also  test  for  inter- 
element  shorts  and  leakages.  Complete  in  attractive, 
sturdy,  quartered-oak  case.  Sloping  etched  panel  of 
silver  and  black.  Suitable  for  portable  or  counter  use. 

j,  \  Model  431  same  as  430  except  has  Readrite  (GOOD-BAD)  Meier 

*^\  Dealer  Price $15.90 

\%\         A  MODIFIED    EMISSION    TYPE   TESTER 
„\  APPROVED   CIRCUIT 


SALES    AID 


MISS  SYLVANIA  SINGS 


+  A  new  window  display  has 
been  added  to  Hygrade  Sylvania's 
"Girl"  series.  The  handsome  blonde 
who  is  familiar  as  "Winking  Girl," 
"Kicking  Girl"  and  "Opera  Girl" 
now  hits  a  high  "C"  as  a  radio 
artist. 

In  this  display  the  singing  voice 
is  shown  opposite  the  yowl  of  an 
alley  cat.  Both  figures  appear  be- 
hind a  fence  picketed  with  repre- 
sentative tube  types.  Background 
is  rich  blue,  and  flasher  lights  are 
provided  to  illuminate  the  cat's 
green  eyes  and  the  word  "tubes." 

Sylvania  has  also  announced  a 
new  counter  and  wall  sign  for  deal- 
ers and  servicemen.  It  features 
the  company's  6-months'  guarantee 
plan  by  reproducing  a  guarantee 
certificate.  It  is  lithographed  in 
three  colors  on  heavy  cardboard  and 
ties  in  with  Spring  sales 'drives.  It 
has  an  easel  for  standing  display, 
and  a  cord  for  hanging  on  a  wall. 

RECOTON  EYE-CATCHER 

*  A  new  display  for  counter  or 
window  is  being  released  by  Reco- 
ton  Corp.,  178  Prince  St..  New  York 
City.  The  placard  is  a  lively-col- 
ored card  which  identifies  the  deal- 
er with  phonograph  needles,  and 
illustrates  the  Recoton  needle  with 
its   special   shaft   and   round    point. 

Actual  packages  of  needles  are 
not  used  in  the  display,  as  many 
dealers  have  found  it  unwise  to 
keep  such  small  items  out  on  the 
counter.  This  placard  is  designed 
to  remind  the  customer,  while  the 
dealer  keeps  his  actual  stock  else- 
where. 

MOVIE  TRAILERS  FOR  DEALERS 

*  Now  available  to  farm  radio 
dealers  is  a  series  of  60-second 
movie  trailers  suggesting  the  use 
of  6-volt  farm  radios  equipped  with 
Winchargers.  The  films  will  be 
made  available  to  those  writing  to 
Wincharger  Corp,  Sioux  City,  Iowa. 

These  movies  show  the  pleasure 
of  "big  city"  radio  reception  for 
50c  a  year  power  operating  cost, 
and    dramatize    the    advantages    of 


56 


Radio  Today 


wind  power.  The  appearance  of  the 
films  is  the  first  step  in  a  new  and 
widespread  dealer  cooperative  ad- 
vertising campaign  soon  to  be 
opened  by  the  company. 

*  A  bit  of  Chicago  radio  news 
which  made  fine  reading  turned  up 
recently  when  Paul  J.  Pfohl,  RCA 
Radiotron  representative,  announced 
the  birth  of  a  son,  Roger  Lee.  P.  0. 
Kni in  in.  purchasing  agent  for  Sen- 
tinel, took  a  striking  photo  of  Roger 
Lee  and  soon  thereafter  the  picture 
appeared  on  a  birth  anouncement 
deftly  prepared  in  the  form  of  a 
minature  4-page  edition  of  the  mag- 
azine,  "Life." 

*  There  is  plenty  of  optimism 
these  days  at  the  plant  of  Quam- 
Xichols  Co.,  manufacturer  of  loud 
speakers,  for  according  to  Jim 
Qv.ain.  president  of  the  company, 
February  shipments  were  within 
$97.00  of  last  year's  figures  and 
March  shipments  may  run  ahead  of 
last  year. 

*  Another  marriage  at  Whole- 
sale Radio  Service  Co.,  New  York 
City,  is  that  of  Guy  Maken,  assist- 
ant purchasing  agent,  to  Miss 
Florence  Roscher,   Brooklyn,  N.  Y. 

*  E.  F.  Carter  has  been  named 
assistant  chief  engineer  for  Hygrade 
Sylvania  radio  tubes,  according  to 
chief  engineer  R.  M.  Wise.  Mr. 
Carter  has  been  in  the  firm's  en- 
gineering dept.  for  8  years,  with 
various  promotions,  and  has  been 
handling  the  duties  of  assistant 
chief  since  last  September. 

*  -/.  R.  Price,  Eastern  Division 
mgr.  for  Utah  Radio  Products  Co., 
Chicago,  with  headquarters  in  New 
York,  first  president  and  one  of  the 
founders  of  the  "Representatives" 
resigned  from  this  organization 
this  week,  owing  to  his  inability 
to  give  sufficient  time  to  the  activi- 
ties of  this  group  of  trade  members. 
To  his  keen  regret,  Mr.  Price  found 
it  necessary  to  resign,  not  only  as 
a  member,  but  as  Chairman  of  the 
Board  of  Governors,  and  as  a  mem- 
ber of  the  committee  sponsoring  the 
special  train  to  the  Chicago  Parts 
Show  in  June. 

+  Before  leaving  for  Florida  on 
a  well  deserved  vacation,  George 
Russell,  Sentinel  sales  manager, 
commented  upon  the  fact  that  sev- 
eral of  the  company's  jobbers  had 
reported  exceptional  success  on  in- 
tensive sales  drives  over  a  period 
of  the  past  two  or  three  weeks. 
These  jobbers  are  sending  their 
men  out  to  cooperate  with  their 
dealers  wherever  possible  and  the 
results  are  apparently  well  worth- 
while. Mr.  Russell  found  all  Sen- 
tinel jobbers  going  after  business 
actively  in  Minneapolis,  Omaha, 
Denver  and  Kansas  City,  which  he 
visited  recently  on  his  sales  swing. 

*  The  Radio  Reel  Co..  Tacoma, 
AVash..  who  recently  introduced  the 
Hush-Tone  radio  volume  control, 
has  informed  the  trade  that  because 
of  added  improvements  the  list  price 
of  this  attractively  packaged  acces- 
sory is  now  $8.50,  with  standard 
trade  discounts. 


c/^isten  Radio  Servicemen! 

FOR  a  long  time  there  had  heen  a  real  need  for  a  Radio  Service- 
men's Organization  that  could  hand  together  the  competent  radio 
servicemen  in  a  democratic,  self-governing  association  -without  suh- 
sidy  from  or  control  hy  any  other  division  of  the  radio  industry. 

Radio  Servicemen  of  America,  Inc.,  has  this  as  its  prime  objective. 

But  to  achieve  this  end  and  win  a  place  for  the  service  group  as  a  rec- 
ognized factor  in  this  complex  industry,  four  things  are  necessary: 


A  The  selection  of  only  qualified 
members. 

BA  direct  voice  in  the  affairs  of  the 
association  by  every  individual 
through  elected,  regional  repre- 
sentatives. 


These  objectives  are  assured  in  the 
newly  completed  plan  of  Radio  Service- 
men'of  America,  Inc.    HERE'S  WHY! 

1  There  are  20  districts,  each  of 
which  is  represented  by  elected 
representatives,  for  all  the  affiliated 
chapters  in  that  district. 

2     Qualifications      for      membership 
are  determined  by  local  chapters. 

3  Local  membership  in  a  local 
chapter  where  such  local  chap- 
ters exist,  is  necessary  to  full  mem- 
bership   in    the    national   organization. 

4    Quality,  not  quantity  is  the  mem- 
bership aim. 

BUT  SERVICE 
TO    ITS    OWN    MEMBERSHIP 

is  a  Big  Personal  Reason 

WHY  YOU  SHOULD  HAVE  A 

MEMBERSHIP  IN 

RADIO  SERVICEMEN 
OF    AMERICA,    INC. 

Regular  mailings  of  advance  informa- 
tion on  new  circuits.  ...  A  monthly- 
house  organ,  exclusively  for  members. 
...  A  publicity  program  in  news- 
papers, trade  publications  and  on  the 
air.  .  .  .  Free,  expert  technical  infor- 
mation. ...  A  National  Speakers'  Bu- 
reau to  provide  authoritative  speakers 
for  local  chapters.  .  .  .  An  educational 
program  in  the  interest  of  better  ser- 
vicing. .  .  .  Membership  costs  only 
$2.00  a  YEAR  for  national  dues  for 
1938. 

DON'T    WAIT! 

Kill  out  the  application.  We  will  send 
yon  full  details  of  the  organization, 
more  app!ieation  hlanks  .  .  .  everything 
yon  need  to  join  this  new  and  impor- 
tant effort  to  organize  servicemen  for 
better  servicing  and  more  profit.  Mail 
the     blank     today     with     your     check     to 


The  insistence  upon  rigid  ethical 
professional  standards  that  will 
earn  a  right  to  the  confidence  and 
cooperation  of  manufacturers  and 
publishers. 

A  quality  of  service  that  will  earn 
the  respect  and  patronage  of  the 
public. 


RADIO    SERVICEMEN 
OF    AMERICA,    Inc. 

(Incorporated  Not  {or  Profit) 

304  S.  Dearborn  St.,  Chicago,  111. 


Application  for  Membership 

Gentlemen: 

I    hereby    make    application    for    membership    in 
the  Radio  Servicemen  of  America,   hie. 

Affiliated  with  Local  Chapter  in 


State. 


Personal    Name    

Home     Address     

City 

Firm    Nam=    

Address     

Telephone    (home) (firm) .  . 

Years'    Experience Arje. 

Membership   in   other  Associations 


Whole  or  part  time  Radio  Serviceman 

If    part    time,    what    portion    is    devoted    to    Radio 

Servicing    ('/4,  |/2.  2/3,  etc.) 

What  are  your  other  duties 


Education  other  than   Radio. 


Radio  Training   or  Courses. 
Testing     Equipment 


It  is  my  sincere  desire  to  become  a  member  ard 
adhere  to  your  principles  of  fair  competition  and 
ethics  and  if  accepted  do  solemnly  swear  (or  affirm) 
that  I  will  faithfully  fulfill  my  obligation  as  a 
member  of  the   Radio  Servicemen  of  America.    Inc. 


Signed 


Applicant 

Approved:    Chapter   Secretary 

Executive  Secretary   

Enclosed  Check  □  M.  0.  Q  Cash  fj 


RADIO  SERVICEMEN  OF  AMERICA,  Inc. 

JOE  MARTY,  Jr.,  Executive  Secretary,  304  S.  DEARBORN  ST.,  CHICACO,  ILL. 

♦      SPONSORED   BY   RMA   AND   SALES   MANAGERS'   CLUBS      ♦ 


March,    1938 


57 


—  1938  — 

TOPSTREEM 

MOBILE    AERIALS 
ARE    BEST 


MAXIMUM    PICKUP 
EXCLUSIVE  "KNEE  ACTION" 
MOUNTING 

TEN  MODELS  TO  FIT  EVERY  CAR 
WARRANTED  RUST  PROOF 
PRICES    MOST   REASONABLE 
LICENSED  AND   MANUFACTURED 
UNDER   PATENT  105067 


Sales  Offices  in   AH  Principal  Cities 

For  Descriptive  &  Price  Folder,  consult 

your    nearest    jobber    or    write    to 

TOPSTREEM,     INC. 

1811  S.  LYNDALE  AVE,,  MINNEAPOLIS,  MINN. 


New 

recOton 

Phono- A  ttachment 

Its  original  design  makes  a  definite 
prospect  of  an  owner  of  ANY  type  radio 
.  .  .  console  (fits  on  top)  .  .  .  midget 
(underneath).  The  SINGLE  FRONT 
OPENING  makes  this  possible.  High 
fidelity  crystal  pickup  giving  studio  tone. 
Genuine  walnut  cabinet — hand  rubbed 
lacquer  finish.  Write  for  other  features. 

AUTOMATIC 
DISPENSER 
CUPS 

Press  the  center— 
a  needle  appears. 
Always  works. 
Novel  ::  Useful 
Decorative 

RECOTON    CORP. 

178  Prince  St.,  New  York 


JOBBERS 


+  Brown  Supply  Co.  of  St. 
Louis  and  Charles  F.  Scott  of 
Scranton,  Pa.,  have  been  appointed 
distributors  for  Stromberg-Carlson, 
it  was  announced  by  Lee  McCanne, 
radio  sales  manager  for  Strom- 
oerg.  The  up-state  New  York  ter- 
ritory previously  sold  by  the  Gray- 
tar  Electric  Co.  of  Syracuse  has 
been  divided  into  three  sections. 
The  Watertown  area  has  been  taken 
over  by  the  Hudson  Valley  Asbestos 
Corp.,  Albany  Stromberg-Carlson 
distributor.  The  Binghamton -Au- 
burn section  has  been  converted 
into  a  direct  dealer  territory,  to  be 
contacted  by  Lawrence  Loveless, 
while  the  Syracuse  and  Oswego  re- 
gion will  be  served  by  Stanley  Man- 
son,  also  as  a  Stromberg-Carlson  di- 
rect dealer  area. 

+  To  get  complete  details  of  the 
new  Zenith  auto  radio  line,  and  to 
hear  about  the  company's  new 
"Radio  Nurse,"  the  firm's  distribu- 
tors met  recently  at  three  regional 
conventions:  Feb.  28  at  the  Sir 
Francis  Drake  Hotel  in  San  Fran- 
cisco; March  4  at  the  general  offices 
of  the  Zenith  Corp.  in  Chicago,  and 
March  7  at  the  Waldorf  Astoria  Ho- 
tel in  New  York   City. 

+  Bruno-New  York,  Inc.,  and 
Krich-Radisco,  Inc.,  Newark,  N.  J., 
were  hosts  to  about  150  dealers  at 
a  presentation  of  several  new  RCA- 
Victor  products  held  at  the  Hotel 
Pennsylvania  on  March  8th.  T.  F. 
Joyce,  advertising  and  sales  promo- 
tion manager  of  the  RCA-Yictor 
Co.,  Inc.,  was  in  charge  of  the  pres- 
entation which  featured  the  new 
Victor  Record  player  and  the  new 
Victor  Symphony  receiver.  Mr. 
Joyce  presented  a  most  effective 
sales  story  in  connection  with  these 
products,  also  commenting  upon  the 
extraordinary  progress  that  has 
been  made  in  the  development  of 
the  Victor  Records  Society. 

•  C.  A.  Stoll,  139  Alton  Ave., 
Dayton,  Ohio,  has  been  appointed 
representative  for  Clarostat  Mfg. 
Co.,  Inc.,  Brooklyn,  N.  Y.  Mr.  Stoll 
replaces  W.  W.  Boes,  and  is  an  ex- 
pert on  resistance  problems. 


HICKOK 

RADIO    TESTING 

INSTRUMENTS 


HIGHEST 
ACCURACY 
for  20  Years 

As  a  pioneer  {leveloper  and  builder 
of  radio  testing  equipment  and  as 
an  outstanding  manufacturer  in  this 
field  for  many  years,  Quality  and  Ac- 
curacy have  had  first  consideration 
in  every  Hickok  Instrument. 
For  absolute  reliability  use  these 
HICKOK   TESTING  INSTRUMENTS 

*  Tube  Testers 

*  Set  Testers 

*  Oscillographs 

*  Signal  Generators 

*  Zero  Current  Voltmeters 

*  Volt-Ohm-Milliammeters 

*  Frequency  Modulators 

*  Appliance  Testers 

*  Panel  Instruments 

Write    today    for    a    copy    of   latest 

catalog  showing  all  of  these  Hickok 

Radio   Testing   Instruments. 

HICKOK 

ELECTRICAL  INSTRUMENT  CO. 

10419  Dupont  Ave.      Cleveland,  Ohio 


EPENDABLE 


TUBES 


58 


Radio  Today 


'Bob"  Campion  (center),  the  Raytheon  representative,  is  photographed  with 
James  Gould,  left,  and  R.  L.  Ross  of  R.  L.  Ross  Co.,  San  Antonio  jobbers. 


•  Haskel  A.  Blair,  sales  man- 
ager for  David  Bogen  Co.,  sound 
equipment  manufacturers,  has  been 
touring  the  Southwest  to  call  on 
sound  specialists  and  parts  jobbers. 
Mr.  Blair  also  went  to  Mexico  to 
establish  distribution  for  Bogen 
and  to  aid  salesmen  with  outlines 
of  the  new  merchandising  and  sales 
features  of  Bogen  intercommunica- 
tors  and  PA  equipment. 

*  Two  execs  of  General  Elec- 
tric's  radio  division,  C.  M.  Wilson, 
sales  manager,  and  Arthur  A. 
Brandt,  advertising  manager  re- 
turned recently  from  a  long  field 
trip  through  the  major  markets. 
They  found  retail  sales  increasing, 
GE  jobbers  generally  optimistic. 


■*  Braid  Electric  Co.,  Nashville, 
Tenn.,  Zenith  distributors  of  which 
Ben.  S.  Gambill  is  president,  have 
recently  been  appointed  jobbers  for 
Middle  Tennessee  for  the  Kelvina- 
tor  line  of  domestic  appliances.  Mr. 
Gambill  reports  that  new  Kelvina- 
tor  dealers  are  rapidly  being  named. 

*  Philco's  New  York  division, 
headed  by  Hal  Sheer,  was  the  win- 
ner of  the  company's  Sales  Man- 
ager's Cup  competition.  The  Cup 
is  awarded  to  the  division  leading 
the  country  in  auto  radio  sales  at 
the  half-year  mark. 

Cliff  S.  Bettinger,  Philco's  Pacific 
division  manager,  has  announced 
final  standings  for  the  later  half  of 
1937.  In  receivers  Heine  Grimm 
was  first;  in  XX  models,  Harold 
Dishon;  in  auto  radio,  Eustace 
Vynne.  Placing  first  in  final  stand- 
ings for  Philco  distributors  was 
Ralph  Brew,  Fresno,  Calif. 

*  F.  G.  Klock  and  /.  J.  Shapiro, 
executives  of  Universal  Camera 
Corp.,  32  W.  23rd  St.,  New  York 
City,  have  returned  from  a  U.  S. 
tour  which  amounted  to  a  survey 
of  the  camera  industry,  conducted 
with  a  view  of  lending  further 
merchandising  aid  to  TJnivex  deal- 
ers and  distributors.  Universal 
Camera  recently  opened  a  company 
branch  in  Toronto,  Canada,  at  345 
Adelaide  St. 


*  Introduced  by  Weston  Elec- 
trical Instruments  Corp.,  Newark, 
N.  J.,  is  a  new  idea  to  aid  service- 
men in  convenient  purchasing  of 
test  instruments.  A  "quick  facts" 
tag  is  now  attached  to  each  unit, 
which  gives  a  concise  summary  of 
what  the  instrument  will  do. 

*  "Free  Passes"  to  Radio  Parts 
City,  the  home  of  the  1938  National 
Radio  Parts  Trade  Show  at  the 
Hotel  Stevens  in  Chicago  June  8-11, 
are  being  issued  to  companies  who 
contract  for  space  up  to  the  middle 
of  March.  Firms  get  1,000  passes 
for  each  booth  occupied. 

+  National  Union  Radio  Corp. 
has  a  new  district  manager,  /.  J. 
(Jack)  McBride,  to  cover  Indiana, 
Ohio,  Michigan,  Northern  Kentucky 
and  the  city  of  Chicago,  according 
to  NU  general  sales  manager  Homer 
H.  Eunkler.  Mr.  McBride's  experi- 
ence has  been  with  Grunow,  RCA, 
and  others;  he  will  now  contact 
dealers  and  distributors  in  the  in- 
terest  of   NU   product   merchandis- 


•  Albeit  Finkel  of  J.F.D.  Mfg. 
Co.,  4111  Ft.  Hamilton  Pkwy., 
Brooklyn,  N.  Y.,  will  shortly  estab- 
lish headquarters  in  Chicago,  cov- 
ering Illinois,  Ohio,  Wisconsin,  Mis- 
souri, Iowa  and  Kansas. 


"ALWAYS  FIRST  WITH  THE  LATEST" 

Bogen  has  consistently  pioneered  im- 
portant improvements  in  sound.  Recent 
surveys  of  sound  specialists  show  that 
Bogen  equipment  is  gaining  preference 
rapidly  because  of  its  advanced  design 
and    high    performance. 

UNIVERSAL 
MOBILE  SYSTEM 

For  6  volt  DC  and  no  volt  AC 

A  TIMELY  SYSTEM  FOR  THIS  PERIOD 
OF  THE  YEAR  — FOR  MOBILE  OR 
STATIONARY   JOBS. 

No  plug  in  power  packs.  Instantaneous 
switch  over.  2S  watts  undistorted — peak 
35  watts.  Universal  microphone  input. 
Duo  stage  electron  mixing.  "Standby" 
switch  for   battery   economy. 


CP28D  System 


list  $256.50 


Consists  of  C-28  amplifier  with  phono 
assembly.  Sylvania  tubes,  "Transducer" 
bullet  hand  mike,  with  25  ft.  shielded 
rubber  covered  cable,  2  Jensen  PM12B 
dynamic  speakers,  each  with  10  ft.  rubber 
covered   cable  and   polarized   plug. 

DAVID  BOGEN  CO.,  Inc. 

663  Broadway,  New  York  City 


'PIONEERS  IN 
PUBLIC  ADDDE)) 
DEVELOPMENT 


Use  the 
MOTOR 

that    sells 


RADIO-PHONOGRAPHS 


pOPULAR  PRICED  radio-phonographs  equipped  with  General  Industries  Flyer  Motors 
J-  sell  better.  They  demonstrate  better  —  and  it  is  fine  playing  by  the  phonograph  that 
swings  sales  of  combinations.  You  are  sure  of  high-fidelity  reproduction,  regardless  of 
changing  record  drag.  ...  Go  after  the  growing  business  in  combination  sets.  Install 
Flyer  Motors. 

HAVE     YOU     TESTED     MODEL     V? 
Types  for  AC  or  universal  AC-DC.    Popular  Model  V,  with  governor  control,  has  set- 
screw  speed  adjustment.     Find  out  how  remarkably   efficient  Flyer  Motors   are.     Order 
samples   for  testing.     Please  specify  exact   voltage   and  frequency   of   current   you   use. 


Imdustiies  CO. 


3838  Taylor  Street 
Elyria,  Ohio 


March,  1938 


59 


QUALITY 

RECOGNIZED  BYALL 


ELECTRONOMETER 
SERIES  700  $49.95 

A  complete  laboratory  of  compact  size  lor 
horough  tube  analyzing  and  point  to  point 
>et  testing,  incorporating  22  ranges  for 
Tieasuremcnts  of  A.C.  and  D.C.  voltages, 
rurrenl     resistance,    decibel    and    output. 

Accuracy  guaranteed  by  use  of  wire 
wound  shunts  of  1%  tolerance  and  matched 
esistors    of    1%    tolerance. 

Endorsed  and  used  by  leading  engineer- 
ng    concerns,    broadcast    stations    and    insti- 


Sec       'PRECISION"     instruments     at     yo 
distributors    or     write     for    literature. 


PRECISION 

APPARATUS  CORP. 

821  EAST  NEW  YORK  AVENUE 
BROOKLYN.  NEW  YORK 


Everything  you  need  in  radio.  It's  all  in  this 
new  RADOLEK  RADIO  PROFIT  GLIDE. 
Every  repair  part  for  every  receiver.  Newest 
radio  receivers.  New  1938  model  public  address 
amplifiers,  outputs  for  5  to  100  watts.  New 
model  public  address  speakers.  Test  instruments. 
Technical  books.  Special  equipment.  Leading 
standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 

And  everything  under  one  roof.  You  get  what 
you  want  promptly,,  and  exactly  what  you  want. 
Radolek's  immense  stock  plus  Radolek's  efficient 
organization  insures  you  fastest  service.  25.000 
service  men  depend  on  this  service  and  benefit 
by  Radolek's  lowest  prices.  Send  now  for  your 
copy  of  Radolek's  Radio  Profit  Guide.  It  will 
help  vou  make  more  money. 

RADOLEK---1 

601  W.  Randolph,  Chicago,  Dept.  D-17 

Send  me  the  1938  Radolek  Radio  Profit.  Guide  FREE.fj 

Name 

Address    

Serviceman?  d 


Dealer?  □         Experimenter?  □ 


SERVICE  INSTRUMENT 
RACKETS 

(Continued  from  page  23) 

soquently,    such    a    meter  cannot    be 

classified   as   a   no-current  drain  type 

meter  even  on   DC  since  the  resist- 
ance is  not  infinite. 

Wave  form  in  audio 
oscillators 

While  variable  audio  oscillators  are 
not  widely  used,  some  of  the  units  are 
greatly  lacking.  Wave  form  in  some 
cases  is  extremely  bad,  being  chock 
full  of  harmonics.  Examination  on 
an  oscilloscope  will  readily  reveal  the 
status  of  the  waveform.  Naturally, 
the  distortion  will  be  greater  at  low 
frequencies.  From  about  150  cycles 
up.  the  wave-form  should  be  substan- 
tially linear.  The  frequency  calibra- 
tion of  the  audio  oscillators  is  easily 
checked  by  using  a  piano  and  feeding 
the  oscillator  into  a  speaker. 

The  audible  frequency  spectrum 
published  on  page  2  of  Part  II  of 
Radio  Today  for  January  shows  the 
frequencies  of  the  various  piano  keys. 
Comparison  should  be  made  by  ad- 
justing the  audio  oscillator  to  zero 
beat  with  the  piano.  Middle  C  for 
instance  is  256  M.C  on  the  Physical 
scale.  (Usually  pianos  are  tuned  on 
the  International  pitch  which  places 
middle  C  at  261.6  instead  of  256). 
While  the  highest  note  on  the  piano 
is  4,048  or  O4,  harmonics  can  be 
zero  beated  the  same  as  with  a  E.  F. 
oscillator.  C4  on  the  International 
pitch  scale  will  be  4,192  cycles.  How- 
ever, for  most  practical  purposes,  the 
Physical  scale  with  its  middle  C  at 
256  will  be  satisfactory. 

Tube  testers  are  an  item  that  are 
hard  to  evaluate,  since  their  useful- 
ness is  dependent  more  upon  the  man- 
facturer's  preliminary  work  on  de- 
termining the  tube  limits.  (Boun- 
daries for  good  and  bad  units).  Even 
the  best  of  material  and  workman- 
ship will  not  make  a  good  tube  tester 
unless  the  limits  have  been  accurately 
determined.  Seems  that  the  best 
guide  is  to  buy  from  the  reputable 
manufacturers  in  the  tube  tester 
field. 

Short-comings  of  tube  testers 

There  are  other  shortcomings  in 
tube  testers.  Some  units  place  too 
high  a  voltage  on  battery  type  tubes 
and  consequently  will  spoil  the  fila- 
ment because  of  too  great  an  emis- 
sion. Sockets  in  the  testers  should 
not  grip  the  tube  prongs  too  tight 
since    with    constant    use    they    will 


PRECISION  EQUIPMENT  IS 

APPROVED 


SERIES  840  L  -VOLT-OHM- 
DECIBEL    -    MILLIAMMETER 

including    a 

2500    VOLT    A.C.    and    D.C.    RANGE 

and  a   1000  M.A.  RANGE 

Specifications 
*    5  A.C — D.C.   VOL-    ,*  5  OUTPUT  RANGES 


TAGE    RANGES    from  *   3  RES  I  STANCE 

0  to  2500  volts  at  1000  RANGES  from  0  to  10 

~t_i  „„,  „„u  megs,     (provision    for 

ohms  per  volt.  fe„     conYained   ba„e. 

*   4  D.C.  CURRENT    ries). 
RANGES  from  0   to    1     *  5  DECIBEL  RANGES 
amp.                                         from— 10   to  plus  63DB 
Net    price    less    batteries  m -i  q  Qr 

■  and    test    leads 4)1*3.30 


Net   price   le 
and    test    lee 


PRECISION 

APPARATUS  CORP. 

811    EAST  NEW   YORK  AVENUE 
BROOKLYN.  NEW  YORK         C\ 


CROWE 


INTER- 
CHANGEABLE 


ON -THE -PANEL    CONTROLS 


NEARLY  four  million  auto  radio  sets, 
new  within  the  last  three  years,  offer 
you   an    unusual    opportunity. 

Sell  Crowe  On-the-Panel  Controls  to  re- 
install these  still-serviceable  radios  in  new 
cars  and  to  replace  old-fashioned  under- 
dash  or  steering  column  controls  in  own- 
ers'   present    cars. 

Crowe  Controls  are  interchangeable  for 
all  cars  and  most  makes  of  radios.  Airplane 
or  porthole  dials.  Easy  to  install.  Eco- 
nomical  to   stock. 


See   Your  Jobber 

Go  after  your  share  of  this  re- 
placement business.  Get  a  stock 
of  Crowe  Controls  from  your 
jobber. 


ASK    FOR 
BULLETIN 


CROWE  NAME  PLATE  &  MFG.  CO. 

1745  GRACE  STREET     CHICAGO 

CABLE  ADDRESS:     CRONAME  -  CHICAGO 


60 


Radio  Today 


soon  wear  out.  In  a  receiver  this  is 
not  true,  for  in  the  usual  life  of  the 
set,  the  tubes  will  not  be  removed 
more  than  a  dozen  times,  but  in  tube 
testers  the  sockets  are  used  thousands 
of  times.  Then,  too,  there  is  the  con- 
venience angle.  For  rapid,  accurate 
operation  the  controls  should  be 
handily  located,  and  tube  charts 
easily  read. 

A  few  other  minor  items  that  have 
been  noticed  follow.  Some  ohm- 
meters  in  order  to  achieve  measure- 
ment of  extremely  high  resistances 
use  voltages   as  high  as  300  or  400 


without  an  automatic  protective 
switch.  Contact  across  such  a  volt- 
age while  not  dangerous  is  uncom- 
fortable. When  using  a  hi-voltage 
ohmmeter  the  serviceman  should  con- 
sider the  circuit  under  test  and  noi 
use  high  voltages  with  low  voltage 
components  unless  he  is  planning  an 
overhead  test. 

Also  some  of  these  megohmmeters 
have  poorly  insulated  terminals  and 
the  collection  of  dust  and  oil  soon 
places  a  resistance  of  a  few  megohms 
across  the  terminals.  Then  the  meas- 
ured values  of  high  resistors  are  in 
error. 


THORDARSON'S  UNIQUE 
DEMONSTRATION 

*  The  new  Thordarson  amplifier 
line  was  introduced  to  parts  dis- 
tributors throughout  the  country  on 
March  7th  in  one  of  the  most  unique 
sales   presentations   ever   sponsored 


Two  nation-wide  sales  meetings 
were  held  through  the  medium  of 
a  telephone  broadcast  by  Charles  P. 
Cushway,  general  sales  manager  of 
the  Thordarson  Electric  Mfg.  Co. 
Mr.  Cushway  spoke  from  the  new 
sound  proof  studio  and  display 
room  recently  installed  at  the  Chi- 
cago Thordarson  factory  and  in  the 
studio  there  were  present  as  guests 


Center   row— V.    K.    Ulrich,   technical    editor,   RADIO    TODAY;    Charlie 
Cooper    and    John    De    Blasi. 


in  the  radio  parts  industry.  Thor- 
darson jobbers  gathered  in  the  eve- 
ning in  Boston,  New  York,  Buffalo. 
Philadelphia,  Washington,  D.  C, 
Detroit,  Atlanta,  New  Orleans,  St. 
Louis,  Dallas,  Tulsa,  Salt  Lake 
City,  Portland,  Ore.,  Los  Angeles, 
San  Francisco,  Kansas  City,  Mo., 
and  Minneapolis. 


a  representative  group  of  distribu- 
tors and  amplifier  experts  from 
Chicago  and  vicinity.  At  the  close, 
the  jobbers  in  the  different  cities 
were  the  guests  of  the  Thordarson 
sales  representatives,  and  the  new 
amplifier  line  was  thoroughly  in- 
spected by  the  distributors  and 
their  sales  organizations. 


*  Newest  part  of  the  engineer- 
ing expansion  program  under  way 
at  Andrea  Radio  Corp.  is  the  addi- 
tion of  James  Bonelli  to  the  staff. 
Mr.  Bonelli  was  a  research  engi- 
neer at  F.  A.  D.  Andrea,  Inc., 
from  1928  to  1934,  and  in  his  new 
berth  will  again  work  under  pio- 
neer Frank  A.  D.  Andrea.  New  per- 
sonnel will  be  divided  between  the 
increasing  demands  of  the  export 
dept.  and  the  special  requirements 
of  the  firm's  new  domestic  line. 

Recently  the  company  put  in  a 
novel  display  of  "Climate  Sealed" 
receivers     at     Rockefeller     Center, 


New  York  City,  on  the  "concourse" 
near  where  the  famous  Radio  City 
guide  tours  start. 

*  Mary  Ellen  DeWees.  weighing 
7  lb.  15  ounces,  arrived  Feb.  20,  at 
the  home  of  Mr.  and  Mrs.  Clifford 
DeWees.  Mary's  gifted  father  is  the 
advertising  manager  of  the  Stewart- 
Warner,  radio  and  refrigerator  di- 
visions, and  her  advent  was  signal- 
ized by  the  mailing  of  a  dainty  ten- 
page  three-color  folder,  with  pic- 
tures in  baby-blue  and  baby-pink, 
captioned  in  running  verse  around 
the  theme  "All  for  one  and  one  for 
all;   ever  at  her  beck  and  call." 


Noises 

DIAGNOSED 

9  By  all  means  include  an  AEROVOX 
NOISE  ANALYZER  in  your  servicing 
equipment.  It  solves  those  line-noise 
problems —  quickly,  accurately,  profit- 
ably. 

0  Merely  plugs  in  between  noisy  appliance 
and  line,  or  between  set  and  line.  Turn- 
ing of  knob  cuts  in  different  types  of 
filters.  Dial  indicates  AEROVOX  NOISE 
ELIMINATOR  to  use  to  duplicate  results. 

9  Indispensable  to  the  well-equipped  serv- 
iceman. Standard  equipment  with  lead- 
ing service  organizations.  Obtainable  at 
S7.50  net  cost. 


KILLED 


0  Six  different  types  of  line  filters  or  AER- 
OVOX NOISE  ELIMINATORS  to  choose 
from  in  effectively  killing  those  line 
noises. 

0  Simply  plug  in  between  appliance  at- 
tachment-cord plug  and  outlet,  or  be- 
tween set  attachment-cord  plug  and 
outlet. 

•  For  best  results,  use  NOISE  ANALYZER 
to  select  type  and  installation  method 
for  given  application. 


Ask 


your  local  AEROVOX  jobber  to 
show  you  the  Noise  Analyzer  and  the  Noise 
Eliminators.  Ask  for  your  copy  of  "Clear 
Reception."  Or  write  us  direct. 


ERvM 


j 


CORPORATION 

70  Washington  St  ".       :  Brooklyn,  N.  Y. 


mmammm  b  ■»«««" 


March,   1938 


61 


,7  i°.U=  "X-»V_ -1*  Model  B6  f  or  2  Gan6  v 
-e  is  a  prospect  Cond.  Receiver! 

This  LIST$f560 

takes   ANY 


■■  Model  B6JA  for  3  and  4  I 

.„_._  „__.   ,_._!-  GangVar.Cond.Receh 
by    selling   this  LIST  *725  i 

ipact,  fool-proof  *     -*»- 


nly3  leads  to  con-  ceiveras  well  as  push 

nect.  button  control. 

•  6  Push  Buttons.  •Coi       

•  Compact  5lA"  wide,  by 
1l/2"high,2I/2"deep.  ©Unit  com  pic 

•  Adaptable  for  re-  instructions,    co- 
mots  control:  cutcheon,  station 

•  Manualcontrolof  re-  tabs,  hard' 

AUTOMATIC  DEVICE  MANUFACTURERS 

Dept.  4C,  4243  West  Ogden  Ave..  Chicago,  U.  S.  A. 


LAFAYETTE 
PUBLIC 
ADDRESS 
SYSTEMS 

• 

LAFAYETTE 
RADIOS 

CAMERAS 


:eaturing  the  famous  Lafa- 
yette economy  line  of  Public 
Address  —  now  completely 
redesigned!  Amplifiers,  ad- 
vanced sound  equipment  .  .  . 
handsomer,  finer  in  tone, 
greater  in  sales  appeal!  Lat- 
est systems,  from  5  to  175 
watts  .  .  .  new  professional 
type  recording  equipment 
.  .  .  de  luxe  portable  line. 
Send  for  FREE  catalog  now 
— see  P.A.  on  parade  and 
more  profits  for  you! 


MRM 


MAIl  COUPON  MOW 

TMMJEMB 


NEWYORK.N.Y.  .  CHICAGO, ILL.  .  ATLANTA,  GA. 


WHOLESALE  RADIO  SERVICE  CO.,  INC 

901  W.  Jackson  Blvd.,  Chicago  •  100  Sixth  Ave.,  New  York) 

(MAIL  TO   NEAREST  WAREHOUSE) 
Rush  the  NEW  SPRING  Catalog  No.  7I-I2C8   □ 


State 


•k  J.  H.  Clippinger,  vice-presi- 
dent and  general  sales  manager  of 
Continental  Radio  &  Television 
Corp.,  Chicago,  narrowly  missed 
participation  in  the  recent  Los  An- 
geles flood.  "J.H."  barely  managed 
to.  leave  the  Coast  before  the  floods 
started  raging.  He  returned  to 
Chicago  with  substantial  orders 
from  the  leading  Coast  centers, 
after  visiting  the  trade  with  Lou 
Willis,  Pacific  Coast  representative 
for  Admiral. 

•k  Earl  Dietrich,  manager  of  dis- 
tributor sales  for  the  Raytheon 
Production  Corp.,  is  back  after  a 
six  weeks'  swing  around  the  South- 
east circuit.  He  brought  interest- 
ing reports  of  Raytheon  distribu- 
tors, indicating  Raytheon  tube  sales 
ahead  of  the  corresponding  sales 
last  year.  The  new  Raytheon  Tube 
Data  Book  is  meeting  with  an  en- 
thusiastic reception  everywhere  and 
orders  are  coming  in  far  beyond 
expectations.  While  on  this  trip, 
Mr.  Dietrich  attended  the  ham-fest 
Feb.  27,  sponsored  by  the  Came- 
radio  Co.,  Pittsburgh,  Pa.,  leading 
parts  jobbers.  Notwithstanding  a 
raging  blizzard  which  made  travel- 
ing most  impossible,  more  than  900 
attended.  Generally  speaking,  Earl 
found  the  Southeastern  states  in 
better  shape  than  those  sections  of 
the  country  in  the  industrial  belt, 
with  the  jobbers  anticipating  favor- 
able business  for  the  remainder  of 
the  year. 

+  Back  into  the  radio  business 
after  a  long  absence  on  account  of 
ill  health,  Fred  J.  Wessner  has 
joined  Webster-Chicago  as  sales 
promotion  manager.  Mr.  Wessner 
was  formerly  sales  manager  for 
National  Union.  His  offices  will 
now  be  located  at  Webster-Chicago's 
home  offices  at  5622  Bloomingdale 
Ave.,  Chicago.  As  he  moved  in, 
Mr.  Wessner  said:    "Our  plans  are 


Wessner  joins  Webster-Chicago 

to  materially  increase  our  program 
of  sales  assistance  to  jobbers  and 
dealers  as  well  as  to  improve  upon 
our  technical  help  liason  with  the 
trade." 


Complete 
Electric  Plants 


COMPLETE    POWER   UNITS 

Operating  A.C.  Radio,  PUBLIC  AD- 
DRESS SYSTEMS,  SOUND  CARS, 
MOTION  PICTURE  EQUIPMENT, 
and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Sys- 
tems, Refrigerators,  all  Household  Ap- 
pliances for  FARMS,  CAMPS,  LAKE 
HOMES,  or  STANDBY  SERVICE.  For 
use  anywhere  Power  Line  Current  is 
not  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C.,  6,  12,  32  and  110  Volt, 
D.C.  as  well  as  Combination  A.C.-D.C. 
Units.  Anyone  can  Operate.  COM- 
PLETE, READY  TO  RUN. 

f  WRITE  FOR  DETAILS  ON  DEALERS'  Tl 
PROPOSITION  AND  TERRITORY  it 

D.  W.  ONAN  &  SONS 

589  Royalston  Ave.,  Minneapolis,  Minn. 


E.    H.   RIETZKE        ^^l5Eai*iilH         PRES.   OF  CREI 


IS  RADIO  .  .  . 

Just  a  Job  to  You? 

If  you  can  equip  yourself  with  the 
necessary  training  .  .  .  Radio  can 
offer  you  a  future  no  other  industry 
can.  Continuous  new  developments 
have  created  opportunities  for  tech- 
cally  trained  men,  who  have  kept  their 
knowledge  up  with  Radio's  fast  pace, 

YOU   CAN'T  BLUFF  YOUR  WAY 

CREI  courses  are  planned  only  for 
serious-minded  men  who  know  that 
it  takes  Training  to  qualify  for  and 
to    hold   the    big    jobs    and    salaries 
that    go    with    them.      Let    us    sug- 
gest the  course  best  suited  for  you 
and  the  easy  ways  of  paying  for  it. 
Write   for  the   CREI 
"TESTED   PLAN" 
Paste   the   coupon   below  on   a 
penny  post  card  and  receive  your 
copy  of  this  interesting  and  in- 
spiring booklet. 

CAPITOL  RADIO 

Engineering  Institute 


MAIL  THIS  COUPON  TODAY  ! 


CAPITOL  RADIO  ENGINEERING  INSTITUTE 
Dept.  RY3,  14th  and  Park  Rd.,  Washington,  D.  C. 
Please  send  me  complete  details  and  FREE  illus- 
trated 48-page  booklet — "A  Tested  Plan  for  a 
Future    in    PRACTICAL    RADIO    ENGINEERING." 

Name    

Address    

City    


RY3 


62 


Radio  Today 


•     INDEX    • 

TO  ADVERTISEME 

NTS 

Page 
....   55 

ABC   RADIO    LABORATORIES 

AEROVOX   CORP 

61 

ALLIED    RADIO    CORP 

....   64 

AMERICAN    MICROPHONE   CO.,   INC.... 

....   54 

AMPER1TE    CO 

35 

ARCTURUS    RADIO   TUBE   CO 

....   51 

AUTOMATIC   DEVICE    MFRS 

....   62 

BELMONT   RADIO    CORP           

27 

BOGEN    CO..    INC..    DAVID 

....   59 

CAPITOL    RADIO    ENGINEERING    INSTITUTE  62 

CENTRALAB      

52 

CLOUGH-BRENGLE    CO 

....   54 

COLUMBIA   BROADCASTING   SYSTEM,  INC.  8.  9 

CONTINENTAL    CARBON.    INC 

. . . .    45 

CONTINENTAL  RADIO  &  TELEVISION  CORP.  19 

CORNELL-DUBILIER    ELEC.    CORP 

4 

CROSLEY    RADIO    CORP 

6 

CROWE  NAME  PLATE  &  MFG.  CO 

....    60 

GALVIN    MFG.   CORP 

.Cover  4 

GENERAL  ELECTRIC  CO 

.Cover  2 

GENERAL    INDUSTRIES    CO 

59 

GOODMAN'S  DISPLAY  SPECIALTIES... 

....   64 

HICKOK   ELECTRICAL   INSTRUMENT  CC 

....    5S 

HYGRADE  SYLVANIA  CORP 

33 

INTERNATIONAL   RADIO   CORP 

....   55 

INTERNATIONAL   RESISTANCE   CO 

41 

JANETTE    MFG.    CO 

....   54 

JOHNSON    MOTORS    

3 

KEN-RAD  TUBE  &  LAMP   CORP 

58 

MALLORY  &  CO.,    INC..    P.    R 

1 

NATIONAL  UNION   RADIO   CORP 

53 

NOBLITT-SPARKS   INDUSTRIES.    INC... 

....   31 

OHMITE    MFG.    CO 

. ...    55 

ONAN   &  SONS.    D.   W 

. ...   62 

PHILCO   RADIO  &  TELEV.  CORP..  TUBE 

DIV.     5 

PIONEER    GEN-E-MOTOR    CORP 

50 

PRECISION    APPARATUS    CORP 

.  . . .   60 

QUAM-NICHOLS   CO 

55 

RADIART    CORP 

50 

RADIO    CORP.    OF  AMERICA 

7 

RADIO    PARTS   SHOW .». .  . 

. ...    50 

RADIO  SERVICE  MEN  OF  AMERICA.   INC...    57 

RADOLEK    

60 

RAYTHEON    PRODUCTION    CORP 

. ...   43 

RCA   MFG.  CO..   INC.,   RADIOTRON   DIV. 

. ...    29 

RCA  MFG.  CO..  INC..  RCA-VICTOR  DIV. 

2 

READRITE   METER  WORKS 

56 

RECOTON    CORP 

58 

REGAL  AMPLIFIER   MFG.   CORP 

56 

RIDER,  JOHN   F 

. .   45 

SOLAR    MFG.    CORP 

. ...   63 

STROMBERG-CARLSON  TELE.   MFG.  CO. 

21 

THORDARSON  ELECTRIC   MFG.  CO 

49 

TOPSTREEM,  INC 

. .   58 

TRAV-LER   RADIO  &  TELEVISION   CORP 

....   53 

TRIPLETT  ELEC.    INSTRUMENT  CO.    .. 

. ...   48 

TUNG-SOL   LAMP  WORKS,    INC 

. ...   45 

WARD  PRODUCTS  CORP 

Cover  3 
37 

WEBSTER-CHICAGO     

WESTON    ELEC.    INSTRUMENT  CORP... 

47 

WHOLESALE  RADIO  SERVICE  CO.,   INC 

...    62 

insure 
gainst 
hange 
index. 

While    every    precaution    is    taken    to 
accuracy,      we      cannot      guarantee      a 
the     possibility     of     an     occasional 
or  omission   in  the  preparation  of  this 

SMALLER  ......   .  METAL  SEALED 


SOLAR  MINICAP  Dry  Electrolytic  Capacitors 
mark  much  more  than  an  advance  in  an  art. 
They  mean  that  filters  now  occupy  less  space, 
cost  less,  have  longer  life  because  of  permanent 
sealing,  are  used  in  single  units  to  simplify  both 
production  and  stock-keeping,  and  are  "stand- 
ard" parts. 

Solar  engineers  have  been  the  pioneers  in  ad- 
vanced methods  of  making  radically  smaller 
dry  electrolytic  capacitors,  "little  giants",  intro- 
duced three  years  ago,  were  the  original  ultra- 
compact  drys.  Now  we  announce  further  size 
reduction,  superior  characteristics  and  out- 
standing utility  in  the  new  Minicaps.  You  will 
find  them  in  thousands  of  radio  sets — and  they 
will  stay  there. 

Details  upon  Request. 
SOLAR  MFG.  CO.,  599  Sway.,  New  York 


March,  1938 


63 


Southern  jobbers  huddle  at  Atlanta,  Ga.,  for  recent  merchandising  session  with  Hygrade  Sylvania  sales  executives. 


*  From  21  radio  and  electric 
wholesale  supply  houses  in  the 
South  came  representatives  for  a 
big  tube  sales  conference  held  by 
Hygrade  Sylvania  recently  at  At- 
lanta, Ga.  Complete  merchandising 
plans  for  1938  were  outlined  and  a 
long  string  of  new  tube  sales  pro- 
motion were  presented.  Those  at 
the  conference  are  shown  in  the 
exclusive  photo  presented  here- 
with. (1)  A.  J.  Wheeler,  Chat- 
tanooga Paper  and  Woodenware 
Co.,  Chattanooga,  Tenn.;  (2)  F.  J. 
Gordon,  Beck  and  Gregg  Hdwe.  Co., 
Atlanta,  Ga.;  (3)  William  Rawson, 
Clary-Marsh,       Inc.,      Birmingham. 


*£  IzatUos j&weif ~r&oes 


•  Get  this  brand  new  guide  to  Everything  in  Radio, 
FREE — iust  send  coupon!  Service  men  and  service  de- 
partments everywhere  find  what  they  want,  quickly,  in 
ALLIEDS  Catalog.  Over  12,000  exact  duplicate  and 
replacement  parts  for  building  or  repairing  any  circuit: 
all  leading  lines  of  Testers — analyzers,  tube-checkers, 
set-testers,  meters,  signal  generators;  revolutionary  new 
Sound  Systems.  10  to  70  watts,  portable,  mobile, 
permanent;  Builder's  Kits,  Amateur  Gear,  books,  tools, 
etc. — and  56  sensational  new  "Knight"  Radios,  with 
newest  features — Push-Button  Tuning,  etc.,  at  new' 
low  prices,  sets  for  every  purpose — some  under  $10, 
ideal  price-leaders  for  dealers.  You'U  And  164  pages 
of  special  values  in  ALUED'S  new  Spring  Catalog — 
just  out!  Send  Coupon  now  for  FREE  copy. 


ALLIED  RADIO  CORP. 


833  W.   Jackson   Blvd.  Dept.  15 

Chicano,    III, 

O  Send     me     your     new     Spring-and-Sur 
Catalog— FREE. 


J:Ha.ui.n.iii.!.r 


Ala.;  (4)  W.  W.  Orr,  Freck  Radio 
Supply  Co.,  Asheville,  N.  C;  (5) 
T.  T.  Freck,  same  firm;  (6)  W.  A. 
Shuler,  Shuler  Supply  Co.,  New 
Orleans,  La.;  (7)  Harold  Davis, 
Harold  Davis,  Inc.,  Jackson,  Miss.; 
(8)  Eben  E.  Nelson,  Nelson  Radio 
and  Supply  Co.,  Mobile,  Ala.;  (9) 
W.  Ross  Hahn,  Tele  Radio  Supply 
Co.,  Knoxville,  Tenn.;  (10)  E.  C. 
Ammerman,  Radio  Accessories  Co., 
Orlando,  Fla.;  (11)  Frank  Lampe, 
Dixie  Radio  Supply  Co.,  Columbia, 
S.  C;  (12)  G.  C.  Hoffman,  same 
firm;  (13)  H.  M.  Carpenter,  Thurow 
Distributors,  Inc.,  Tampa,  Fla.; 
(14)  J.  C.  Jordan.  Specialty  Dis- 
tributing Co.,  Atlanta,  Ga.;  (15) 
J.  A.  Rawson,  Clary-Marsh,  Inc., 
Birmingham.  Ala.:  (16)  G.  C. 
Dickey.  Radio  Electric  Co.,  Bir- 
mingham, Ala.;  (17)  Fred  Daly, 
Birmingham  Electric  Co.,  Birming- 
ham, Ala.;  (18)  Paul  Lambeth, 
Lambeth  Electric  Supply  Co.,  Win- 
ston-Salem, N.  C;  (19)  F.  F.  Dill, 
Chattanooga  Paper  and  Wooden- 
ware  Co.,  Chattanooga,  Tenn.;  (20) 
Harry  Kerlin,  Radio  Electric  Co7 
Birmingham,  Ala.;  (21)  D.  M.  Mc- 
Innes,  Teague  Hardware  Co.,  Mont- 
gomery, Ala.;  (22)  J.  C.  Luttrell, 
Atlanta  Phonograph  Co.,  Atlanta, 
Ga.;  (23)  Fred  A.  Morris,  Specialty 
Distributing  Co.,  Atlanta,  Ga.;  (24) 
C.  W.  Chapman,  Fulwiler  and  Chap- 
man, Atlanta,  Ga. ;  (25)  R.  H.  Am- 
merman, Radio  Accessories  Co., 
Orlando,  Fla.;  (26)  Ira  J.  Pardee, 
Tele  Radio  Supply  Co.,  Chattanooga, 
Tenn.;  (27)  Reis  M.  Hillard,  Tele 
Radio  Supply  Co.,  Knoxville,  Tenn.; 

(28)  John    C.    Carter,    same   firm; 

(29)  B.  W.  Krell,  Dixie  Radio  Co., 
Columbia,  S.  C;  (30)  J.  T.  Ful- 
wiler, Fulwiler  and  Chapman,  At- 
lanta. Ga.;  (31)  Paul  S.  Ellison, 
Hygrade  Sylvania  Corp.,  New  York, 
N.  Y.;  (32)  F.  F.  Baudry,  Dixie 
Radio  Co.,  Columbia,  S.  C.;  (33) 
L.  E.  Salmon,  Tennessee  Valley 
Electric  Supply  Co..  Tupelo,  Miss.; 
(34)  A.  L.  Milk,  Hygrade  Sylvania 
Corp.,  Emporium,  Pa.;  (35)  H.  L. 
Garvin,  Garvin  Electric  Co.,  At- 
lanta. Ga.;  (36)  R.  P.  Almy,  Hy- 
grade Svlvania  Corp.,  New  York, 
N.  Y.;  (37)  H.  W.  Frisbee,  Spe- 
cialty Distributing  Co.,  Atlanta,  Ga. 

■*  L.  H.  Sullivan  has  resigned  as 
manager  of  RCA's  farm  radio  divi- 
sion, and  will  soon  announce  his 
future  plans. 


*  The  Detrola  Corp.  of  Detroit, 
announces  it  has  secured  an  injunc- 
tion in  chancery  against  Marks 
Stores,  Inc.,  doing  business  as  Boy- 
er's  Haunted  Shacks.  This  injunc- 
tion ordered  Marks  Stores,  Inc.,  to 
stop  the  use  of  "Pee  Wee"  or  a 
hand  in  any  form  or  manner  in  ad- 
vertising or  offering  for  sale  its 
radio  merchandise  similar  to  the 
Detrola   copyrighted   material. 

*  New  radio  and  appliance  store 
in  Davenport,  Iowa,  is  L.  K.  Wild 
Appliances,  at  218  Brady  St.  L.  K. 
Wild,  the  owner,  has  been  with  the 
local  branch  of  Schneiderhahn's 
retail  store  for  the  last  11  years. 


LIGHT! 
ACTION! 
SOUND! 

FOR  YOUR  WINDOW, 
SHOWROOM  OR 
CONVENTIONS 
Used  in  sales  promotion  and  advertis- 
ing- departments  to  increase  orders 
from  retailers  and  to  get  new  accounts. 
A  sensational  new  display  unit  with  great  drawing- 
power.  Comes  ready  for  use;  place  in  position  and 
plug  into  any  AC  outlet.  .  .  Sets  can  be  played  while 
the  unit  is  in  motio.i.  .  .  Three  models — No.  1A — 
100  lbs.  carrvinn  capacity,  net  price  $18.00;  No.  2A 
—125  lbs.,  $20.00;  No.  3A— 150  lbs.,  $23.00.  .  . 
Easily  holds  4  or  5  midgets  at  one  time,  or  com- 
bination  of  console  and   midget  or  end   table. 

Rotatinn  surface  can  be  increased  by  adding  larger 
disk.  Base  can  be  skirted  with  concealed  lights  to 
illuminate  the  disolay  .  .  .  Special  introduetory 
oll'er — Genuine  Lamiluxe  message  band,  on  whic'n 
advertising    message    can    be    placed    and    illuminated. 

We  have  a  variety  of  turntables  with- 
out illumination,  from  $!)  to  $1.1.  Carry- 
ing capacity  25-75  lbs. 


Mystery 
Motion 

Displayer 

makes  articles 
glide  zig-zag 
style  continuously — 
any  mdse.  up  to  5  lbs 

GOODMAN'S 

"ROTARY    RADIO     DISPLAY    SPECIALTIES" 

Helps   you   to   move   your   present    stock 
19  W.  34TH  ST.     Tel.:  Wisconsin  7-S951      NEW  YORK 


64 


Radio  Today 


MAKE  MORE  MONEY 

WITH    WARD    AERIALS! 


7l4e   Jdine.   *lUa£l    EASY    TO     SELL,    EASY    TO     INSTALL 


THE  CHALLENGER 

A  low-priced,  fast-selling  telescopic  hinge- 
type  aerial.  Features  the  new  Easy-Tilt  con- 
tour bracket.  Rust-proof.  Fits  all  cars.  No 
drilling  or  cementing  required.  Full  size. 
Heavy  construction. 


MODEL  SX 

A  real  profit  maker  for  you!  A  quality,  3- 
section  cowl  mounting  aerial.  Rust-proof. 
Beautiful  bright  plate  finish.  Same  type  as 
featured  by  leading  car  makers.  Heavy 
construction.  Easily  installed. 


THE  STATESMAN 

A  new  WARD  top  aerial  that  fits   all  cars.  Top  bar  ex- 
tends  to    35  J^    inches.   Telescopic    cowl     bar    permits 
i  windshields     to    open.    Guaranteed 
\  rust-proof.     Easy,     fast     installation. 


THE  QU1NLAN 

A  streamlined,  2-section,  side-cowl  aerial,  with  attractive 
guaranteed  rust  and  corrosion -proof  finish.  Telescopic, 
extends  from  28^2  to  49J^  inches.  No  soldering.  Easily 
installed. 


•  There's  big  money  in  selling  car  aerials — when  you  sell  the 
WARD  line.  That's  because  this  ueasy-to-sell,"  "easy-to-install" 
line  is  complete  with  models  at  prices  to  suit  every  prospect. 

Each  model  fits  any  style  or  make  of  car  with  no  "top  drilling" 
required.  And  backing  up  this  "all-star"  line  is  WARD'S  kit  of 
salesmakers  —  newspaper  advertisements,  envelope  stuffers,  coun- 
ter display,  window  decals  —  everything  you  need  to  step  up 
sales  is  furnished! 

Write  today  for  complete  details  on  this  new 
money-making  opportunity. 


WARD'S  NEW  COUNTER 
DISPLAY  — This  color- 
ful, attractive  counter 
display  unit  will  do  a 
real  selling  job  for 
you.  It's  free  for 
WARD  dealers. 


FREE  !! 

Send     today     for     free     catalog 

,  showing  WARD'S  complete  line  of 

car  and  home  aerials,  with  new 

reduced   prices  now  in  effect. 


^Ue    WARD    PRODUCTS    Gvup. 


WARD    BUILDING 


CLEVELAND,    OHIO 


IN   CANADA:    500    KING  STREET,    WEST,   TORONTO,   ONTARIO 


MK\VM.K%Jmidt  CAR  RADIO 

IS  TODAY'S  \^t^i/  SELLING  RADIO 

LECTR 


MODEL  "8-70" 

AUTOMATIC  "Spot"  TUNING 

Acoustinator  Equipped 

8  Tubes  —  Push  Pull 

8"  External  Permanent 

Magnet  Dynamic  Speaker 

$69.95 


MODEL  "8-30" 

6  Tubes  —  S'A"  Speaker 

Streamlined  Styling 

3-Gang  Tuning  Condenser 

Matches  All  Cars 

$29.95 


MODEL  "8-50" 

AUTOMATIC  "Spot"  TUNING 

Acoustinator  Equipped 

6  Tubes  —  8"  Speaker 

Installs  Over  Steering  Post 

Matches  All  Cars 

$49.95 


MODEL  "8-40" 

AUTOMATIC  "Spot"  TUNING 

6  Tubes  — tz/2"  Speaker 

Tone  and  Sensitivity  Controls 

3-Gang  Tuning  Condenser 

Matches  All  Cars 

$39.95 


"GOLDEN   VOICE" 

ELECTRIC    Push-Button 

TUNING 

8  Tubes — 8"  Permanent 

Magnet  Dynamic  Speaker 

Beam  Power  Tube 

The  Finest  Money  Can  Buy 

$79.95 


WRITE  YOUR  DISTRIBUTOR  or  GALVIN  MFG.  CORPORATION,  CHICAGO 


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SELLING  SOUND"  in  this  issue 


WITH 

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MODEL  F-65BT 

TOUCH  TUNING  — Instantaneous  variable 
capacitor  type,  positive,  trouble-free  with  six- 
buttons  tuning  in  five  stations  and  the  sixth  but- 
ton providing  for  manual  control.  6  G-E  Pre- 
tested Tubes,  a  Power  Output  of  5  watts  and  a 
12-inch  Stabilized  Dynamic  Speaker  provide 
ample  volume  and  exceptional  clarity,  definition 
and  realism  of  tone.  This  model  features  the 
new  G-E  Louver  Dial  which  enables  easy  tuning 
from  any  position,  standing  or  sitting  —  with- 
out distorting  the  cabinet.  Two  Bands,  Automatic 
Volume  Control,  Automatic  Tone  Compensation, 
I.F.  Wave  Trap,  Visual  Volume  Control,  Visual 
Tone  Control,  and  Tone  Monitor  Circuit  Design ! 


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TOUCH    TUNING     RADIO 
FOR     LESS    THAN     $99.95 


ENERA 


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( 


MAN,  OH  MAN/  WHAT  A  BOOK/ 


The  Second  (1938)  Edition  of  the 

MALLORY- YAXLEY 

Radio  Service  Encycloped 


0^T 


17,000 
RECEIVERS 
ANALYZED 


Mister,  it's  a  B  O  O  K  .  .  .  beyond  your  fondest  dreams.  If  you  thought  the 
First  "MYE"  was  "hot",  you'll  say  this  Second  Edition  "tops"  everything! 

17,000  receivers  analyzed  (5000  more  than  in  the  First  Edition).  336  pages 
of  handy,  concise  information.  (There  were  216  in  the  First  Edition.)  Chuck 
full  of  substantiated  radio  service  data  never  available  before. 

It  gives  the  answer  to  EVERYTHING  a  service  man  wants 
to  know  "in  one  book  .  .  .  on  one  page  .  .  .  on  one  line" 

Vibrators  .  .  .  Transformers  .  .  .  Audio  Distribution  .  .  .  Condensers  .  .  . 
Rectifiers  .  .  .  Antenna  Design  .  .  .  Resistors  .  .  .  Formulas  .  .  .  plus  the  last 
word  on  radio's  newest  and  most  vital  subjects. 

Complete  Automatic  Tuning  Information 

With  over  100  illustrations  . . .  with  schematics  . . .  trouble  shooting 
charts.  Audio  degeneration  . . .  the  new  profit  avenue  modernizing 
old  type  receivers.  Alignment  and  the  use  of  the  Oscilloscope  for 
"high  fidelity"  servicing.  Tube  charts  .  .  .  covering  every  type 
. . .  every  make. 

The  time  you  save  on  the  first  job  in  which  you  use  it  will  more 
than  pay  for  your  copy.  And  the  way  to  make  it  profitable 
for  you  is  to  begin  using  MYE  today!  See  your  distributor  now! 
Hi6  supply  is  limited. 


TUBE 
CHARTS 

AUDIO 
AMPLIFIER 
1     DESIGN  &  USE 

ALIGNMENT 

RESISTORS 


ANTENNA 
DESIGN 

VOLUME 
CONTROLS 

ONDENSERS 

^^H| 

REPLACEMENT 
CONDENSERS. .  .  VIBRATORS 


P.  R.  MALLORY  &  CO.,  Inc.,  INDIANAPOLIS,  INDIANA 

Cable  Address — Pelmallo 


REPLACEMENT 
VOLUME   CONTROLS 


RADIO  TODAY,  April,  1938,  Vol.  IV,  No.  4,  published  monthly  by  Caldwe  11-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription  yearly 
$1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24,  1936,  at 
the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.     Printed   in  U.S.A.     Member  of  A.  B.  C.     Copyright  1938  by  Caldwell-Clements,  Inc. 


NEW  SPACE  COOLER 
MAKES  DRAMATIC 


DEMONSTRATION  ! 


High  quality  "package" 
unit  eliminates  all  engi- 
neering problems . .  Just 
plug  it  in.. No  water  pipes 
to  connect . .  No  wiring  to 
install . .  Fits  on  window 
sill ..  Demonstrates  itself 
..A  new  APPLIANCE! 


J  ;■  

THE  NEW  Johnson  Space  Cooler  is  a  compact, 
self  contained  electric  refrigeration  plant  which 
circulates  air  over  cold  coils  where  it  is  cooled, 
cleaned,  de-humidified — then  distributed  throughout 
the  room.  It  provides  the  refrigerating  equivalent 
of  650  lbs.  of  ice  per  day!  Fits  on 
any  window  sill.  (Width  27".  Win- 
dow sealing-panels  are  furnished.) 

Show  it.  Simply  take  it  to  a 
prospect's  home  or  office.  Plug  it 
in.  And  let  it  sell  itself! 

Nothing  that  you  handle  makes 
a  more  convincing  demonstration. 
The  housewife  in  her  kitchen,  the 
professional  man  in  his  office,  the 

JOHNSON      MOTORS     .    REFRIGERATOR      DIVISION 

2040      MONMOUTH      BLVD.,      GALESBURG,      ILLINOIS 


patient  in  the  sick  room  gets  sold — quick — on  a  unit 
that  gives  real  relief  from  heat  and  humidity! 
The  Johnson  Space  Cooler  is  the  product  of  Johnson 
Motors,  builders   of  the  world   famous   Sea-Horse 
Outboard  Motors,  Briggs  household  refrigerators  and 
other  products  of  high  quality.  More 
than  five   years   in    refrigeration, 
with  many  notable  developments 
to  its  credit,  have  given  Johnson 
a  perfect  background  for  this  lat- 
est achievement. 

•       •       • 
DEALERS,   DISTRIBUTORS 

Send  for  full  details,  discounts  and  mer- 
chandising plans.  The  season  is  HERE. 
Every  day  means  extra  profits. 


JOHNSON 


GET  GOING  R  I  GHT  NOW  •  -WRITE,  WIRE  FOR  DETAILS 


Radio  Today 


Up  in  the  cold,  bleak  Arctic — radio  communication  is  all- 
important — the  life-line  to  any  scientific  expedition. 

Radio  tubes  must  work  efficiently  —  must  be  of  sturdy  con- 
struction to  withstand  the  rigors  of  cold  climate,  the  vibrations  of  the 
ship,  the  jarring  of  dog  sleds. 

The  custom-built  radio  receivers  used  in  the  recent  Bowdoin- 
Kent-Harvard  University  Expedition  to  the  Arctic  were  completely 
equipped  with  Raytheon  tubes — another  reassuring  tribute  to  Ray- 
theon engineering,  quality  and  dependability. 

Radio  servicemen  and  dealers  save  on  unprofitable  call  backs 
and  build  good-will  by  Using  these  same  Raytheons. 

Use  Raytheons  for  your  replacements  and  enjoy  greater  per- 
manent tube  profits. 

RAYTHEON 

CHICAGO   •  ATLANTA  •   NEW  YORK  •   NEWTON,  MASS  •   SAN  FRANCISCO 

"WORLD'S  LARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS" 


April,  1938 


dealers  are  making 
sales  NOW  with  this  story! 

THE  HANDIEST 
REFRIGERATOR 
EVER   BUILT 

Here's  a  refrigerator  in  which  a  woman  can  get  at  things 
easily.  Nothing  gets  lost.  The  shelves  in  the  door  per- 
mit storing  of  small  items  so  ingeniously  that  you  can 
actually  get  MORE  FOOD  in  the  Shelvador  than  in 
Ordinary  refrigerators  of  equal  size. 


Conve 

■mall 

tenia    wher 

e    you 

can  alv 

raya  see  thci 

7i  and 

ca.ily 

each  them. 

a      leftover 

that 

might 

be  forgotte 

i  and 

wasted 

SAVE  CURRENT 


1    New 

... 

led       Elec- 

1     troaai 

ta,  t    shows 

1       highce 

operating    effi- 

nmng    pen- 

odiare 

shor 

t.    This  saves 

peratu 

lira) 

itrol  permits 
cooling. 

SAVE  STEPS 


Many  featu 

r.-.likf 

Quick 

Release    ic 

novabl 

e  shelf 

vered  , 

era  for 

leftovers,  a 

nd  the 

drawer  for 

non-rc 

friger- 

a  ted  storage,  save 

many 

•tep.  and  t 

ime. 

SAVE  UPKEEP 


Amazing  new  glass  wool 
insulation  proves  most 
practical  and  efficient  of 
all  insulation.  Dulux 
finish  and  chrome  hard- 


A  refrigerator  is  a  little  room  from  which  an  ingenious  device  extracts 
heat,  providing  safe  food  storage  temperature.  To  do  so  costs  money. 
Hence  skillful  placing  of  food  is  necessary  to  use  all  that  cooled  space. 
The  Shelvador  efficiently  fills  all  space — eggs,  fruit,  butter,  bacon, 
and  covered  dishes,  in  the  door  shelves;  bulkier  foods  on  the  cabinet 
shelves.  When  you  open  the  door  foods  are  instantly  findable,  and 
you  close  it  promptly.  Safe  box  temperature  is  maintained  and 
little  current  used.  And  the  orderly  storage  makes  true  the  state- 
ment that  you  can  "put  more  food  in  the  Shelvador." 

with  built-in  RADIO 


^  YOUW^J- 


With  the  kitchen  more  and  more  the 
center  of  informal  parties  it's  a  swank 
touch.  And  it  lightens  kitchen  labors  1 
It's  a  fine  Crosley  radio  and  there  is 
no  need  to  miss  your  favorite  program 
because  you  must  be  in  the  kitchen. 


All  refrigerators  are  good — all  look  alike — all  have  the 
same  selling  appeal.  The  buyer's  dollar  will  come  easiest 
to  the  one  that  has  more  to  offer  than  the  rest.  With 
the  Shelvador  and  built-in  Radio.  Crosley  dealers  have  a 
powerful  customer  attraction  and  sales-closer  that  is 
creating  business  now. 

THE  CROSLEY  RADIO  CORPORATION    •    •    CINCINNATI 

p  POWEL  CROSLEY.  Jr..  President 

Home  of  "the  Nation's  Station" — WLW — 500,000  watts — 
70  on  your  dial 


Radio  Today 


THEY  mm  HAVE  TUBES- 

i  raMlW*  is  naturally 
and  ■UiAob^fP^ 


BAD'0 
TUBE 


the  men  as  to  the  wu 
PHILCO  name! 


7%^  /^a/oaTT^pA  utrfu>  TOoJiA/ fa- £k/L 


I'VE  GOT 
JUST  WHAT  YOU  NEED 


M0M3S 


*JJ»A**-3 


l^w$®m 


\ 


rJE  buying  public's  confidence  in  Com- 
mercial Credit  Company  and  familiarity 
with  our  time-payment  financing  plan  can  be 
a  good-will  credit  on  your  ledger  ...  a  big 
Help  at  the  point  of  sale. 

Many  of  your  prospective  customers  have 
had  other  purchases  financed  through  us.  We 
exercised  diplomacy  as  well  as  thoroughness 
in   investigating  their  credit.  Our 
collection  system  has  been  courteous 
and  considerate  as  well  as  efficient. 


When  you  offer  them  Commercial 
Credit  Company  financing,  you  find 
ready  acceptance  of  terms. 


Commercial  Credit  Company  supervision 
of  credits  and  collections  is  an  asset  on  the 
merchandising  side,  too.  It  helps  to  eliminate 
bad  credits  .  .  .  allows  you  to  concentrate  on 
sound  sales  to  your  great  advantage.  Prompt 
remittance  of  your  money  increases  your  rate 
of  capital  turn-over. 

Call  on  me.  I  am  one  of  205  local  managers, 
ready  to  finance  all  the  sound  sales  you  can 
make.  The  great  resources  of  Commercial 
Credit  Company  .  .  .  unaffected  by  changing 
local  conditions  .  .  .  are  behind  me. 


RADIOS 


Commercial  Credit  Company 


COMMERCIAL  BANKERS 

fjj^P^J      HEADQUARTERS  BALTIMORE  CONSOLIDATED  CAPITAL  AND  SURPLUS  OVER  $64,000,000 

Serving  Manufacturers,  Distributors  and  Dealers  Thru  More  Than  205  Offices  in  the  U.  S.  and  Canada 


Radio  Today 


To  i*'Tn 

GS^c 


DR.  WALTER  DAMROSCH,  conductor,  NBC's 
exclusive  "Music  Appreciation  Hour,"  America's 
most  widely-listened-to  musical  educational  program 
for  school  children.  Very  popular  among  adults,  also. 

RCA  further  promotes  music  culture  and  the  music  industry  by  cooperating 

with  National  Music  Week — May  1  to  7— You,  too,  can  profit 

by  helping  "Foster  Local  Music  Talent" 


AUTHORITIES  have  declared  radio  ro  be  the 
£\.  greatest  single  factor  in  the  promotion  of 
music.  RCA  again  assumes  leadership  in  this  en- 
terprise through  NBC's  whole-hearted  participa- 
tion in  this  Fifteenth  AnnualCelebration  of  National 
Music  Week,  which  will  be  officially  inaugurated 
by  the  Magic  Key  program  on  Sunday,  May  1st. 
Such  worthwhile  musical  services  are  not  new 
with  RCA  . . .  For,  through  Dr.  Walter  Damrosch, 
on  NBC's  "Music  Appreciation  Hour,"  RCA 
has  for  many  years  contributed  to  the  growing 
musical  enjoyment  of  countless  men,  women  and 
children  throughout  the  country.  Into  their  homes, 
from  the  Metropolitan  Opeta  stage  and  through 
the  NBC  Symphony  Concerts  directed  by  Arturo 


Toscanini  and  other  famous  conductors,  RCA 
has  brought  the  world's  most  magnificent  music. 
Every  Sunday,  RC  A's  popular  Magic  Key  program 
brings  them  superb  musical  entertainment  from  all 
parts  of  the  world. 

Radio  Dealers. . .  Support  National  Music  Week 

It  will  pay  every  radio  merchant  to  stand  behind 
National  Music  Week.  This  worthwhile  promotion 
will  greatly  stimulate  public  desire  for  finemusic.  And 
to  enjoy  it,  people  will  buy  fine  radios,  phonograph- 
radios  and  phonograph  records.  This  will  help 
radio  merchants... So  be  sure  to  cooperate  whole- 
heartedly with  your  local  musical  organizations  and 
broadcasting  stations  in  fostering  local  musical  talent! 


RCA  presents  the  "Magic  Key"  every  Sunday,  2  to  5  P.  M.,  E.D.T.,  on  the  NBC  Blue  Network. 


)   RADIO  CORPORATION  OF  AMERICA 

RADIO  CITY   •    NEW  YORK 

RCA   MANUFACTURING   COMPANY,   INC.  RADIOMARINE   CORPORATION   OF   AMERICA 

NATIONAL   BROADCASTING   COMPANY  RCA   INSTITUTES,   INC.  RCA   COMMUNICATIONS,   INC. 


April,  1938 


APR  19  1938 


Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton   K.   Ulrich 


Lee  Robinson 

Sales  Manager 


©C1B    374634 


Orestes    H.    Caldwell 
"  Editor 


M.    Clements 
Publisher 


Copyright  1938 

Cald well-Clements,   Inc. 

480    Lexington    Ave. 

New   York,    N.    Y. 

Tel.    PLaza    3-1340 

Vol.    IV,   No.   4. 


Member  Audit  Bureau   of   Circulations 


NATIONAL  MUSIC  TUNE-UP 

*  Opening  event  of  the  big  Na- 
tional Music  Week  celebration,  May 
1-7,  is  set  for  2  p.m.  on  Sunday, 
May  1.  C.  M.  Tremaine,  secretary 
of  the  Music  Week  committee,  will 
interview  RCA's  David  Sarnoff,  com- 
mittee chairman,  on  the  Magic  Key 
program  on  the  NBC  Blue  network. 

Other  network  features  will  follow 
during  the  week,  to  mark  the  period 
as  a  nation-wide  stimulation  of  local 
music  talent.  As  the  National  As- 
sociation of  Music  Merchants  points 
out,  "The  Richest  Child  Is  Poor 
Without  Musical  Training." 


INTRODUCING  THE  NARAR 

*  The  National  Association  of 
Radio  and  Appliance  Retailers  got 
under  way  March  21  when  some  fifty 
dealers  from  the  eastern  half  of  the 
nation  met  in  New  York  City  to  line 
up  all  U.S.  dealer  groups  under  one 
banner.  Members  of  the  new  organ- 
ization are  to  be  the  various  radio 
and  appliance  associations  and 
leagues,  with  special  provision  made 
for  individual  dealers  in  areas  where 
no  such  group  exists.  The  purpose  is 
to  clean  up  the  trade  and  to  give  the 
dealer  a  national  voice. 

The  officers  elected  were  Bussell  A. 
Atkinson,  Brooklyn,  N.  T.,  president; 
Homer  C.  Davis,  Philadelphia,  vice- 
president;  W.  H.  Frederick,  Wilming- 
ton, Del.,  recording  secretary;  Ralph 
Wegner,  Fort  Wayne,  Ind.,  treasurer, 
and  B.  H.  Poucher,  Philadelphia,  ex- 
ecutive secretary.  Mr.  Poucher's 
offices  are  now  in  the  Architects 
Building,  17th  at  Samson  St.  Re- 
gional vice-presidents  and  various 
committees  will  be  named  later.  The 
next  meeting  is  scheduled  for  July, 
in  Chicago. 

The  association  went  on  record  as 
favoring  (l)stabilization  of  prices, 
(2)  the  sale  of  radio  and  appliances 
through  established  dealer  outlets 
and     the     elimination     of     discount 


houses,  cooperative  buying  groups,  • 
corporation  buying  and  utility  pur- 
chasing. (3)  control  of  production, 
(4)  uniform  trade-in  allowances,  (5) 
the  labeling  of  merchandise  for  man- 
ufacturer identification,  (6)  the 
elimination  of  cruises,  spiffs,  prizes, 
etc.,  (7)  the  use  of  a  police  policy 
among  its  members,  (8)  the  elimina- 
tion of  misleading  ads,  (9)  the  ex- 
change of  ideas  and  ideals,  (10)  co- 
operation with  other  similar  associa- 
tions, and  (11)  special  support  for 
manufacturers  and  distributors  who 
cooperate  with  the  association. 

FAVORED  FLASHES 

*  A  big  section  of  the  American 
public  flatly  prefers  to  get  its  news 
from  the  radio,  rather  than  from  the 
newspapers,  according  to  figures  re- 
vealed in  Fortune  Magazine's  Survey 
of   Public   Opinion.      Of   the   persons 


C.  E.  Carpenter,  Philco  tube  manager, 

presents    $5,000    first    prize    in    recent 

mystery   contest. 


contacted,  23.5  per  cent  said  that 
their  main  source  of  news  was  the 
radio,  while  45.2  per  cent  said  they 
depended  upon  newspapers,  mostly. 
Radio's  popularity  in  this  field  ia 
therefore  an  amazing  thing,  since  it 
is  only  a  youngster  as  compared  with 
the  newspaper,  and  radio's  long  suit 
is  supposed  to  be  entertainment,  any- 
way. 

Among  those  who  said  that  they 
preferred  radio  as  a  news  source,  the 
reasons    were    given    as    follows : 

Per  cent 

Gets    news    more    quickly 28.4 

Less   time   to   find   what's   going   on 19.5 

More    interesting,    entertaining 11.9 

Just    don't   read   newspapers 7.6 

Radio    fairer    than    newspapers 6.9 

Radio    more    complete    than    papers *.   6.6 

Newspapers    more    confusing 4.3 

No    mistakes    on    radio 3.3 

Work  and  listen  at  same  time 2.8 

Easier    1.6 

Cheaper    1.2 

All    other    5.3 

Don't  know    6 


PARTS  SHOW  EXTRA 

*  Progress  in  the  planning  of 
the  Radio  Parts  Manufacturers  Na- 
tional Trade  Show,  at  the  Stevens 
Hotel  in  Chicago,  June  8-11,  indi- 
cates that  the  event  will  this  year 
have  extra  features,  extra  interest, 
extra  scale. 

The  Show  management  reports  that 
attendance  will  break  all  records. 
With  two  months  yet  to  go,  more 
booths  have  already  been  contracted 
for  than  were  occupied  at  the  show 
held  last  June. 

Representatives  of  the  trade  from 
Canada  and  foreign  countries  will 
have  their  own  headquarters  on  the  ex- 
hibition floor.  Another  new  wrinkle  is 
the  formation  of  a  Personal  Service 
Bureau,  which  will  take  advance  reg- 
istrations and  will  act  as  a  sort  of 
hospitality  center  during  the  show. 
Recently  announced  also  is  a  new 
feature — a  display  built  around  the 
story  of  the  radio  station  donated  to 
the  inhabitants  of  Pitcairn  Island. 
Eighteen  companies  made  donations, 
and  will  be  represented  in  the  dis- 
play. 


8 


Radio  Today 


SARNOFF  REPORTS  FACSIMILE 
UNDERWAY 

*  "Various  broadcasting  stations 
will  shortly  commence  experimental 
transmission  by  facsimile  of  news 
bulletins  and  pictorial  material  to  a 
limited  number  of  receivers  in  their 
local  areas,"  said  David  Sarnoff,  presi- 
dent of  ECA,  at  a  stockholders'  meet- 
ing, April  5.  "The  ECA  Manufactur- 
ing Company  is  now  building  fac- 
simile transmitters  and  several  hun- 
dred receivers  which  have  been  or- 
dered for  this  purpose.  The  funda- 
mental technical  problems  of  facsimile 
have  been  solved,  and  the  immediate 
question  is  largely  that  of  determin- 
ing useful  and  self-supporting  ser- 
vices for  the  medium." 

National  Broadcasting  Company 
earned  a  net  profit  of  $3,700,000  in 
1937,  said  Mr.  Sarnoff.  NBC's  gross 
was  $41,000,000,  about  36  per  cent  of 
ECA's  gross  of  $113,000,000. 

"AMERICAN  RADIO  LEADS 
WORLD"— PALEY 

*  In  a  report  to  the  public  and 
CBS  stockholders  over  the  air,  April 
5,  William  S.  Paley,  CBS  president, 
asserted  that  the  only  basis  for  Fed- 
eral regulation  of  broadcasting  was 
to  prevent  radio  stations  from  inter- 
fering with  or  overlapping  one  an- 
other, and  declared  that  regulation 
should  be  limited  to  "the  bare  necessi- 
ties of  the  case,"  chiefly  that  all 
broadcasters  "should  maintain  free- 
dom, fairness  and  non-partisanship 
of  the  air." 

He  added  that  under  the  private 
competitive    system    existent    in    the 


The   new   vice-president   in   charge   of 

sales     for     Detrola     Corp. — James     J. 

Davin.     He'll  handle  both  radios  and 

refrigerators. 


George    A.    Scoville,    Stromberg-Carl- 

son,  general  manager,  teams  with  Sales 

Manager    Lloyd    Spencer    in    putting 

over  April  sales  drive. 


United  States  broadcasting  had  been 
used  more  effectively  for  the  "enter- 
tainment, the  information  and  the 
education  of  a  whole  people  than  it 
has  under  any  other  plan  of  operation 
in  the  world." 


SPORTS  AHEAD 

The  following  preliminary  listing  of 
big-time  sports  broadcasts  will  give 
the  dealer  a  place  to  start  on  promo- 
tions among  this  special  group  of 
fans.  Whether  or  not  these  broad- 
casts are  listened  to  via  auto  sets 
does  not  influence  the  fact  that  any 
radio  advertising  which  the  dealer 
does  in  connection  with  the  lists,  will 
very  likely  be  read. 

April  23 Chesapeake  Stakes    NBC 

April  29-30 .  Penn  Relays    CBS  and  NBC 

May    7 -Kentucky  Derby    CBS 

May  14 Preakness    NBC 

June    1 English    Derby    NBC 

June    9-11.  National  Open  Golf  Champ.    CBS 

June  10-11. -Wimbledon   Tennis    NBC 

June  22.  .  . .  Schmeling-Louis    Bout    NBC 

June  27 Poughkeepsie   Regatta    CBS  and  NBC 

July    6 'All    Star    Baseball    Game. .  .CBS  and  NBC 


COMPOSERS  TO  HEAR 
MUSIC  OF    FUTURE 

*  Eadio-tube  musical  development 
and  amplified  musical  instruments 
will  have  a  unique  demonstration  at 
the  Town  Hall  Club,  New  York,  May 
5,  under  the  auspices  of  the  League 
of  Composers. 

This  organization  is  backed  by  such 
musical  leaders  as  Leopold  Stokowski, 
Mrs.  Otto  H.  Kahn,  Paul  D.  Cravath, 
Artur    Eodzinski,     Mrs.     Arthur    M. 


Eeis,  Marion  Bauer,  Aaron  Copland. 
Eudolph  Ganz,  Albert  Stoessel  and 
others. 

Dr.  Orestes  H.  Caldwell,  editor  of 
Eadio  Today,  will  preside  as  chairman 
of  the  evening's  program  and  inter- 
pret the  demonstrations  which  are 
designed  to  show  musicians  and  com- 
posers the  possibilities  of  the  new 
electronic  pianos  and  organs,  ampli- 
fied musical  instruments,  and  radio- 
tube  music  sources. 

Benjamin  T.  Miessner  will  discuss 
electronic  instruments,  Leon  There- 
min will  present  space  -  controlled 
music,  and  Joseph  Schillinger  will 
demonstrate  the  Hammond  organ. 

Other  devices  will  be  exhibited. 

FOR  "SELLING  SOUND,"— 
PAGES  27-51,  THIS  ISSUE 

The  second  installment  of  "Selling 
Sound,"  issued  semi-annually  by  Eadio 
Today,  is  included  in  the  latter  pages 
of  the  issue  now  in  the  reader's  hands. 

Designed  as  a  complete  informa- 
tional guide  to  the  active  new  field  of 
sound  re-inforcement  and  public-ad- 
dress, the  current  section  of  "Selling 
Sound"  includes: 

New  trends  in  sound  distribution; 
industry  stabilizing;  big  1938  sales 
promised.  How  to  select  the  right 
microphone,  amplifier  and  speaker. 
Acoustic  considerations.  Amplifier 
ratings.  Contact-mike  opportunities. 
Decibel  levels.  Complete  specifications 
of  sound  systems.  New  developments 
in  sound  equipment.  News  of  the 
sound  business. 


C.  T.  McKelvy  is  in  charge  of  sales 
for    the    new    Seeburg    Radio    Corp., 
soon   to  make  a  big  radio  announce- 
ment. 


April,  1938 


KNIFING  THE  RECESSION 


Nothing   sells    like    selling  —  here  s   a   blast 
of   ideas   for  your  attack  on  a   dull   season 


Caro  Miller  of  L.   Hart  &  Son  Co., 
San  Jose,  Calif. 


F.     J.     Degroot     (and     wife)     A.    J.    Davis   of   Wau- 
of   Sanborn,   Iowa.  kesha.    Wis. 


D.     Tofallos     of 
9th  Ave.,  NYC. 


C.    Llewellyn   of      T.     J.     Byron,     also 
Los  Angeles,   Cal.      of     Los     Angeles. 


Pictured  above  are  the  dealers  who  had  a  hand  this  month  in  our  coast-to-coast  collection  of  vigorous  selling  methods. 


Promote  a  stock  of  small  colorful 
kitchen  model  radios  to  be  pushed  as 
ideal  Mother's  Day  gifts,  lightening 
the  burden  of  her  working  hours. 
With  each  radio  give  a  small  memo 
pad,  ostensibly  to  be  used  for  radio 
recipes  and  a  list  of  various  morning 
programs  with  the  hour  and  the  sta- 
tion where  each  may  be  heard. 

Dust  off  the  trade-marks  of  manu- 
facturers and  give  them  a  chance  to 
register  with  your  customers.  Spot 
them  on  appropriate  sets  against  col- 
orful backgrounds  and  remember  that 
old  ones  may  be  as  interesting  as 
newer  emblems. 


Knock  at  the  door  of  your  cus- 
tomer's most  likely  neighbor,  when 
you  deliver  a  set,  as  if  by  mistake. 
Among  people  who  live  in  flats  and 
bungalow  courts,  this  does  not  seem 
far-fetched.  Apologize  for  your  mis- 
take, but  start  a  sales  talk  and  angle 
for  an  invitation  to  return  as  soon  as 
you  have  installed  the  set  you  came 
to  deliver. 


Fasten  a  series  of  large  sheets  of 
paper  together,  to  represent  an  enor- 
mous book  with  the  binding  at  one 
end.  Spot  it  in  the  center  of  your 
window,  opened  to  a  page  upon  which 
is    lettered    the    features    of    a    new 


model.  Either  a  foot-light  or  a  spot- 
light may  be  used  to  seize  attention 
for  the  sales  message. 


Encourage  the  practice  ot  your 
salesmen  taking  new  table  models 
home  with  them,  one  by  one.  Suggest 
that  more  intelligent  selling  will  re- 
sult from  a  thorough  testing  of  each 
receiver  under  local  conditions.  Ex- 
periences collected  from  such  tests 
can  be  worked   into  sales  arguments. 


Ask  customers  whether  they  know 
the  difference  between  a  megacycle 
and  a  motorcycle.  To  encourage  listen- 
ing to  Continental  broadcasts,  explain 
that  the  short  wave  proposition  is 
really  very  simple;  use  an  authorita- 
tive yardstick  of  radio  wave  bands, 
common  sense  and  non-technical  talk. 


Choose  a  feature  model  to  show 
in  mass  display.  Conduct  the  stunt 
so  that  the  prospect  will  get  the  def- 
inite idea  that  you  have  stocked  the 
number  by  the  dozens;  convey  the  im- 
pression that  you  have  only  the  ut- 
most confidence  in  the  job — its  qual- 
ity and  its  coming  popularity. 

Make  a  list  of  all  the  dramatic  seri- 
als on  the  air,  under  the  head  of 
"What  will  happen  next?"    Be  sure 


that  you  are  familiar  with  the  broad- 
east  stories  yourself,  and  get  your 
prospects  interested  in  the  plots.  In- 
troduce the  programs  briefly  in  dem- 
onstration periods,  if  necessary. 


Get  up  a  mailing  piece  which  fea- 
tures the  sales  and  engineering  phrases 
used  by  manufacturers  in  1938.  Be 
sure  that  you  have  the  latest,  and  that 
you  tell  them  a  little  something  that 
prospects  were  not  able  to  get,  in  the 
way  of  explanation  of  these  phrases, 
from  other  sources.  Don't  be  so  gen- 
eral that  the  prospect  won't  feel  the 
urge  to  come  into  the   store. 


Tell  your  assistants  that  your  store 
must  be  kept  slick  as  a  whistle  from 
front  to  back.  See  that  the  whole 
establishment  has  a  "first  class"  at- 
mosphere that  will  influence  the  mood 
of  the  salesmen  as  well  as  the  cus- 
tomers. Publicize  the  idea  that  the 
day  of  the  junky  radio  sales  and  ser- 
vice shop  is  gone. 

Re-check  the  lighting  in  your  win- 
dows, and  see  that  your  displays  in- 
troduce your  store  to  the  public  as  a 
clean  shop.  If  your  competitor  wishes 
to  fill  his  window  full  of  special  prices, 
teach  him  a  lesson  by  keeping  special 
price  signs  out  of  your  window,  but 
meet  him  in  values. 


10 


Radio  Today 


Establish  yourself  as  a  factor  in 
your  local  celebration  of  National 
Music  Week,  May  1-7.  See  that  your 
store  is  headquarters  for  information, 
and  work  with  all  organizations,  such 
as  music  clubs,  schools,  choral  groups, 
etc.,  and  make  sure  that  the  broadcast 
schedules  are  passed  around.  Use  the 
slogan  "Foster  Local  Music  Talent" 
and  accent  work  among  younger  per- 
sons of  your  community. 

Get  the  dope  on  how  many  of  your 
prospects  are  moving  on  the  official 
moving  day,  May  1.  Suggest  that  you 
will  move  the  old  set  out  on  the  ap- 
pointed day,  and  if  possible  take  a 
look  at  the  new  address  and  suggest 
what  1938  receivers  would  fit  into  the 
new  surroundings. 

Make  up  your  own  list  of  news 
broadcasts  which  concern  the  Austrian 
situation,  for  a  group  of  prospects 
which  will  obviously  have  a  special 
interest.  Also,  cash  in  on  the  intense 
interest  in  broadcast  news  on  the  war 
in  Spain  and  the  conflict  in  China. 

Take  advantage  of  the  fact  that 
major  league  baseball  begins  April 
18.  Use  the  sports  schedule  as  the 
basis  for  tube  check-ups  among  sport 
fans,  and  see  that  they  have  enough 
personal  radios  among  them.  Get  in, 
too,  on  the  listener  interest  in  airings 
of  the  Kentucky  Derby,  Penn  Relays, 
Wimbledon  tennis  matches,  the  Max 
Schmeling-Joe  Louis  bout  on  June  22, 
golf  tournaments,   etc. 

Distribute  mailing  pieces  in  a  cir- 
cular form,  as  a  new  promotion  on 
records.  Include  lists  of  new  record- 
ings, and  dope  on  most-popular  tunes. 
Invite  people  to  hear  the  records,  and 
be  sure  to  list  the  new  record-playing 
instruments  offered  by  manufacturers. 
Introduce  record  fans  to  new  orches- 
tras by  suggesting  that  they  listen  to 
the  radio  programs  of  the  artists  con- 
cerned. 

Tell  your  customers  that  they 
"need  to  have  the  winter  weather" 
taken  off  their  radio  antennas,  for  best 
reception  in  the  Spring.  Suggest  that 
the  winter  months  may  have  left  the 
aerial  in  an  unfortunate  condition,  so 
that  you  have  a  chance  to  make  re- 
pairs or  to  talk  up  the  advantages  of 
a  newer  and  better  type  of  antenna. 


At  the  right  Miss  Bette  Cooper,  who 
was  named  "Miss  America  1937,"  but 
who  snubbed  the  razzle-dazzle  con- 
nected with  the  award,  and  went  home 
to  finish  school.  Back  home,  one  of 
her  pals  is  a  personal  Philco. 


Record  of  Handling  of  Radio  Listed  Below 

7         ,/  ~  g9f™     N?     210° 

BOUght  frnm  ,'  .i~^f~J /  Tz^J^-y%^f ^£ Price ^  

0 


^— v  Date  of  Purchase 

Make. 


V-i^-e-     Z-  /   /~/rs!^ 


Sold  to. 
Address. 


%    A?Wi^w^  £-r~ 


II 


/?  3  y 


Remarks  _ 


Use  your  old  sales  records  as   "leads"  for  replacement  and  extra-set   prospects. 

Customers  of  three  years  past,  or  longer,  are  usually  ready  for  another  purchase 

or  for  a  service  inspecton  and  tube-and-antenna  check-up! 


Call  your  staff  together  and  tell 
them  that  the  marketing  authority. 
Mrs.  Christine  Frederick,  has  issued 
the  statement  that  women  buy  60  per 
cent  of  the  radios.  Exchange  notes 
and  experiences  on  selling  women  and 
outline  the  sales  which  make  up  a 
better  merchandising  approach  to  that 
sex. 

Check  over  all  your  old  and  new 
customers  to  find  where  they  need 
extra  sets.  Keep  records  on  which 
of  them  have  radios  in  the  kitchen, 
dining  room,  bed  room,  sewing  room, 
play  room,  daughter's  room,  son's 
room,  nursery,  game  room,  maid's 
room,  chauffeur's  room,  garage,  work- 
shop and  attic.  See  that  your  sales 
staff  believes  that  every  comfortably 
equipped  home  should  have  at  least 
as  many  radios  as  there  are  people  in 
the   household. 


Exhaust  the  prospects  for  small 
radios  in  the  industrial  sections  of 
your  community.  Explain  to  factory 
managers  that  radios  are  needed  for 
power  house  engineers'  personal  use — 
point  out  that  a  number  of  radio  sta- 
tions are  now  giving  frequent  time 
signals  which  are  invaluable  for  check- 
ing clocks  and  blowing  factory 
whistles  on  the  dot. 

Start  a  campaign — on  small  radios 
particularly — among  business  houses. 
Explain  to  store  keepers  that  a  radio 
set  is  a  business  asset  in  attracting 
customers  and  holding  them  while 
they  look  and  buy.  Check  up  on  these 
places  in  your  town ;  barber  shops, 
restaurants,  candy  stores,  gas  stations, 
offices,  factories,  shoe-shine  parlors, 
beauty  shops,  drug  stores  and  cigar 
stores. 


*  ANNOUNCEMENTS  in  the 
auto  radio  field  this  Spring  have 
added  up  to  a  special  merchandising 
proposition  for  dealers. 

Radiomen  have  listened  to  flashes 
about  Mototone,  Safety  Tuning, 
Motoset,  Bel  Monitor,  Syncro-Tun- 
ing.  Sportsman,  Acoustimatic,  Magic 
Voice,  Commander,  Acoustrol,  Elim- 
inode,  Acoustinator,  and  other  trade 
developments. 

They  watched  the  automotive  man- 
ufacturing industry  stage  a  highly 
successful  promotion  on  used  cars. 
They  realized  that  most  of  the  new 
owners  were  prospects  for  sets  or 
service. 

They  received  from  23  major  man- 
ufacturers in  the  auto  radio  field  a 
series  of  powerful  merchandising 
helps.  They  noticed  that  the  new 
display  and  demonstration  devices 
had  taken  on  new  appeal,  new  color. 

Records  of  cars 

The  next  step,  then,  is  the  execu- 
tion of  a  new  sales  campaign  for  the 
current  months  which  will  dramati- 
cally take  into  account  all  these  new 
elements  in  the  business. 

Eor  one  thing,  there  is  the  matter 
of  the  dealer's  getting  a  list  of  all 
likely  car-owners  in  his  area.  Accu- 
rate and  up-to-the-minute  lists  of  car 
radio  prospects  come  (1)  from  the 
regular  lists  of  home  radio  and  ap- 
pliance customers,  (2)  from  an  ex- 
change of  information  with  automo- 
tive outlets  in  the  community,  (3) 
from  newspapers  which  carry  news 
about  newcomers,  (4)  from  connec- 
tions with  auto  clubs  and  whatever 
drivers'  schools  there  happen  to  be 
ir.  the  community,  (5)  from  records 
of  special  demonstrations,  and  (6) 
from  reports   of  auto  shows. 


Auto  drivers  get  the  big 
broadcasts  these  days 
at  just  the  touch 
of  a  button. 


SPRING 
SELLS 
AUTO 
RADIO 


All  the  names  collected  from  these 
sources  are  carefully  approached  with 
sales  material  on  such  1938  features 
as  push-button  convenience,  simplic- 
ity, of  installation,  new  angles  on 
styling,  developments  in  noise  sup- 
pression, advantages  of  custom-built 
equipment,  and  the  great  variety  and 
appeal  to  be  found  in  the  new  auto 
aerials. 

Making  them  buy 

Armed  with  all  the  names  and  ad- 
dresses and  phone  numbers  which  are 
worth  a  Spring  approach,  the  dealer 
then  considers  a  likely  appeal  for 
each  party.  This  often  depends  upon 
what  the  prospects'  Springtime  driv- 
ing plans  are,  what  they  like  to  listen 
to  on  their  auto  radio,  and  how  fussy 
they  are  about  the  appearance  of 
their  car. 

Here's  where  the  new  roto  news- 
papers, paper  napkins,  giveaway  pen- 
cils, post  cards,  blotters,  pass-out 
folders,  thermometer  name  plates, 
book    matches,    handbills,    etc.,    come 


More  tuning  ease  is  provided 
by  colored  tabs  identi- 

•fc."" "■•>•■.*,        fying  four  networks, 
on  Motorola. 


into  the  picture.  All  these  have  been 
styled  for  1938  and  rushed  out  in 
masses  from  manufacturing  head- 
quarters. 

Demonstration  tricks 

One  of  the  new  wrinkles  in  dem- 
onstration of  car  radio  is  the  use  of 
a  parked  car,  in  front  of  the  dealer's 
store.  The  radio  is  turned  on,  tuned 
to  a  show  that  will  attract  average 
passers-by,  and  the  car  is  plastered 
with  stickers  which  will  hook  the 
stunt  up  with  the  dealer's  name  and 
store.  Because  the  car  is  not  occu- 
pied, and  because  it  has  extra  dec- 
oration as  well  as  a  lively  broadcast 
to  be  heard,  people  will  stop  to  look 
and  listen.  This  device  is  being 
recommended  by  several  manufactur- 
ers, who  supply  the  dealer  with  the 
stickers. 

Other  showing's  will  occur  in  the 
usual  manner  in  the  store,  while  the 
dealer  uses  demonstration  boards 
which  give  the  customers  a  chance  to 
try    new    tuning    devices    themselves. 

In  some  cases,  dealers  prefer  to 
show  off  their  new  models  under  ac- 
tual driving  conditions,  and  encour- 
age the  prospect  to  take  a  ride.  In 
instances  where  the  customer  has 
some  special  interest  in  the  elimina- 
ation  of  interference,  this  procedure 
seems  to  be  a  good  bet.  Matters  of 
noise   suppression   are   finally   settled. 

Cover  the  town 

There  are  still  some  gas  stations 
and  some  auto  service  establishments 
which  do  not  sell  auto  radios,  and 
these  are  spots  for  the  radio  dealer 
to  see  that  the  patrons  of  these  places 
hear  about  his  merchandise.  By 
hooking  up  with  these  stations  and 
spotting  demonstrators  among  them, 
the  radio  man  reaches  a  driving  pub- 
lic which  is  of  important  size  and 
buying  power. 

Hardware  stores,  machinery  shops, 
implement  houses  and  other  non- 
radio  outlets  also  deserve  this  sort 
of  attention,  as  they  will  materially 
hike  the  number  of  people  who  are 
introduced  to  the  new  auto-radio 
models. 

Selling  broadcasts 

A  popular  idea  among  dealers  is 
the  use  of  some  form  of  broadcast 
schedule  along  with  auto-radio  ad- 
vertising in  folders,  cards  or  booklets. 
Because  the  motoring  public  is  pre- 
dominantly male  and  because  auto 
radio  listeners  in  general  have  proven 
themselves  to  be  sport  fans,  the  net- 
work coverage  of  sports  events  is  an 
important   factor. 


12 


Radio  Today 


COLLECTING  MONEY  TODAY 

Keeping    close    contact   with    customers.    Watching   credits. 


*  "THE  servicemen  who  look  like 
the  greatest  little  go-getters  often 
turn  out  to  be  the  lousiest  credit 
punks  in  the  business,"  says  a  New 
York  parts  jobber  who  has  the  prob- 
lem   of    collecting   from    servicemen. 

"The  ones  who  put  up  the  biggest 
front  are  apt  to  be  mostly  front,"  he 
declares,  and  adds  that  "the  sleepier 
they  look  the  better  they  manage 
their  business,  as  a  rule." 

To  this  jobber,  the  recession  did 
not  mean  a  tightening  of  credit  terms 
among  servicemen,  but  simply  a  pol- 
icy of  more  personal  contact.  The 
buyers  are  not  meeting  their  obliga- 
tions as  regularly  and  as  promptly 
as  they  formerly  did,  and  this  moves 
the  jobber  to  desert  his  formal  credit 
procedures,  and  to  concentrate  on  in- 
dividual investigations. 

"In  dull  times,  I  give  my  service- 
men every  chance  to  pay,  and  if  they 
show  good  faith,  I  go  easy.  But  if 
they  start  to  be  cagey  and  hard  to 
talk  to,  I  nail  'em." 

New  trends 

Further  investigation  among  the 
parts  distributors  in  Ohio,  Connecti- 
cut, Washington,  Massachusetts  and 
New  Hampshire  reveals  that  servicers 
are  generally  further  behind  than 
usual,  and  that  parts  wholesalers  are, 
as  a  rule,  tightening  their  terms. 
However,  the  survey  shows  that  the 
majority  of  them  are  not  suffering 
from  bad  debts,  the  average  being 
around  3  per  cent  and  many  of  the 
jobbers  reporting  "negligible"  or 
"very  small." 

The  idea  of  more  personal  contact 
as  a  solution  to  current  problems  is 
a  popular  one,  and  jobbers  are  likely 
to  say,  if  asked  about  special  collec- 
tion methods  used  today,  that  "we 
just  keep  after  them  in  a  nice  way." 

One  of  the  main  difficulties  is  de- 
scribed by  a  jobber  in  these  words : 
"Most,  servicers  have  approached  the 
work  through  their  interest  in  the 
technical  aspects  and  not  with  an 
eye  for  business  administration.  They 
are  not  as  a  rule  enthusiastic  about 
business  routine  or  bookkeeping  and 
it  naturally  follows  that  their  credit 
position,  as  a  general  thing,  is  apt 
to  be  precarious  most   of   the  time." 

This  distributor  points  out  that 
"periods  of  recession   tend  to  benefit 


servicemen  because  their  customers 
are  holding  back  from  getting  new 
sets  and  are  more  willing  to  under- 
take repairs  and  replacements.  Many 
servicemen  report  better  business  for 
the  January-April  period  this  year, 
than  for  the  same  months  last  year." 

Which  accounts  are  OK? 

What  they  look  for  in  selecting 
serviceman  accounts  can  be  summa- 
rized as  past  payment  records,  moral 
standing,  ability  to  work,  value  of 
store  and  stock,  trade  references,  po- 
tential profitable  volume,  and  loyalty 
to  one  jobber. 

A  New  York  parts  jobber  says 
sharply  that  "the  collection  problem 
is  the  reason  that  I'm  not  out  today 
contacting  my  servicemen." 

"The  good  ones  are  taken  care  of, 
and  the  lousy  ones  will  come  to  me. 
Collections  in  general  are  rotten  to- 
day, and  a  jobber  executive  spends  as 
much  time  on  them  as  he  does  on 
selling." 

This  jobber  asks  payments  on  the 
tenth  of  each  month,  and  his  ac- 
counts must  make  some  kind  of  an 
effort  at  that  time,  or  he  starts  to 
get  tough.  He  finds  that  many  ser- 
vicemen try  to  play  one  jobber 
against  another,  and  he  often  runs 
into    cases    where    accounts    are    slow 


because  they  are  on  the  books  of 
several  distributors  and  therefore 
can't  keep  up  with  any  one  of  them. 
In  such  instances,  jobbers  phone  each 
other  for  a  friendly  exchange  of 
credit  information. 

For  this  wholesaler,  about  2  per 
cent  of  the  total  volume  must  be 
marked  off  as  bad  debts.  He  finds 
that  on  major  service  equipment, 
about  half  of  the  manufacturers 
handle  the  paper  themselves.  But 
this  does  not  relieve  the  dealer  of  all 
effort  ou  the  account,  because  he  will 
lose  his  commission  on  the  sales  if 
the  serviceman  defaults. 

He  never  gets  too  tough  on  ser- 
vicemen unless  the  girl  at  the  'phone 
tells  him  that  the  boss  is  "out,"  when 
he  knows  that  such  is  not  the  case. 

A  careful  check 

What  this  jobber  does  is  to  keep  a 
sharp  eye  on  the  shop  activity  of  slow 
accounts.  He  watches  for  evidence 
that  the  dealer  was  able  to  buy  mer- 
chandise from  others  and  he  main- 
tains an  acquaintance  with  the  per- 
sonnel so  that  he  knows  practically 
everything  that  happens.  If  the  ser- 
viceman-dealer has  some  slow  ac- 
counts himself,  the  jobber  offers 
some  appropriate  and  tactful  advice 
on  collection  technique. 


'Hard-boiled  collection  methods  should  be  the  last  resort,"  declares  radio  jobber 
Yates  Hoag  of  Utica,  N.  Y.,  who  drew  this  picture. 


April,  1938 


13 


NEW   MUSICAL 


Phonograph  with  Philco 


•k  Table  type  phonograph  radio 
combination.  Crystal  type  pick-np — 
full-floating  motorboard.  Plays  10  or 
12-inch  records.  Uses  Philco  receiver 
chassis.  Cabinet  of  walnut  veneers 
and  contrasting  avodire  wood.  Size  20 
x  14  x  13%  inches.  Model  16  TP— 
list  $79.50.  Radiobar  Co.  of  America, 
Erie  Ave.  &  K  St.,  Philadelphia,  Pa  — 
Radio  Today. 


6-tube  receiver 

*  AC  operated  dual-band  receiver 
tuning  540-1,730,  5,600-18,000  KC. 
Power  output  of  5  watts — 6% -inch 
dynamic  speaker.  Floodlighted  cone 
type  dial.  Push-button  tuning  for  6 
stations — adjusted  from  front  of  set. 
Glowing  bulls-eyes  indicate  band.  Tone 
control.  Walnut  cabinet.  Size  is  10% 
x  19  x  8%  inches.  Model  AZ-196— list 
$59.95.  Emerson  Radio  &  Phonograph 
Corp.,  Ill  Eighth  Ave.,  New  York, 
N.  Y—  Radio  Today. 


Howard  table  set 

+  AC-DC  type  receiver  using  TRF 
circuit.  Finger-tip  tuning  made  pos- 
sible by  illuminated  wheel  controls 
projecting  through  top  of  cabinet. 
Uses  4  tubes  and  has  beam  power  out- 
put. Dynamic  speaker  unit.  Cabinet 
of  steel  felt  laminated.  Felt  lamina- 
tion eliminates  resonance.  Available 
in  opalescent  bronze,  black,  ivory,  and 
cardinal  red  with  contrasting  trim. 
Model  200.  Howard  Radio  Co.,  1731 
Belmont  Ave.,  Chicago,  111. — Radio 
Today. 


Arvin   push-button   tuning 

*  Adapter  unit  for  converting  the 
Arvin  models  22A,  23,  and  42  for  push- 
button operation.  Automatically  tunes 
in  6  stations.  Motor  operated  mech- 
anism attaches  to  side  of  set.  Push- 
button control  clamped  to  steering 
column  or  instrument  panel.  Model 
ET— list  $17.95.  Noblitt-Sparks  In- 
dustries, Columbus,  Ind. — Radio  To- 
day. 


RCA  farm  receiver 

*  4-tube  6-volt  receiver  for  farm 
use.  Superhet  circuit.  Tunes  540- 
1,720  KC.  Output  of  .7  watts.  PM 
dynamic  speaker  unit.  Vernier  dial 
with  8-1  ratio.  Cabinet  of  walnut 
veneer.  Model  94BT-6 — list  $29.95. 
Model  94BT  is  the  same  set  designed 
for  aircell  operation — list  $19.95.  RCA 
Mfg.  Co.,  Front  &  Cooper  Sts.,  Camden, 
N.  J. — Radio  Today. 


Grebe  Challenger 

*  Tuned  radio-frequency  table  type 
receiver  for  AC-DC  operation.  Beam 
power  output  tube — 5-inch  dynamic 
speaker.  Full-vision  illuminated  dial 
with  2-color  scale.  High  "Q"  coils. 
Plastic  cabinet  in  ebony,  walnut,  ivory, 
jade,  and  red.  Size  7  x  10  x  5%  inches. 
Standard  model  tunes  broadcast  band 
—long  wave  band  also  available.  Chal- 
lenger 5.  Grebe  Mfg.  Co.,  Inc.,  119 
Fourth  Ave.,  New  York,  N.  Y. — Radio 
Today. 


Cowl  type  antenna 

*  One-piece  brass,  heavily  chrome- 
plated  auto  radio  antenna  for  cowl 
mounting.  Set-screw  adjustment  per- 
mits lowering  of  rod.  Equipped  with 
34-inch  low-loss  shielded  lead-in.  List 
$3.85.  Hahn-McPherson  Labs.,  Hatboro, 
Po. — Radio    Today. 


Self-contained  amplified  piano,  afford- 
ing concert-grand  volume  and  qual- 
ity from  minipiano  cabinet.  Built  by 
Hardman-Peck  Piano  Company  under 
B.  F.  Miessner  electronic-piano  pat- 
ents. Compact  and  inexpensive,  yet 
giving  full  range  of  artist. 


MERCHANDISE 


Knight  receiver 

*  5-tube  AC  superhet  receiver  with 
push-button  tuning  for  4  stations. 
Manual  tuning  utilizes  dial  with  mag- 
nifying glass  to  provide  large,  clear 
station  calibrations.  Octal  glass  type 
tubes,  automatic  volume  control,  dy- 
namic speaker.  Plastic  cabinet — 11  x 
7x7  inches.  Available  in  ivory,  wal- 
nut, or  black.  Allied  Radio  Corp., 
833  W.  Jackson  Blvd.,  Chicago,  111  — 
Radio  Today. 


DeWald  combination 


*  AC-DC  radio  and  AC  phono- 
graph unit  in  table  cabinet.  Employs 
RCA  synchronous  motor  and  magnetic 
pick-up.  Plays  up  to  12-inch  records. 
Power  output  of  2  watts  using  beam 
power  tube.  Full  range  dynamic 
speaker.  Tunes  broadcast  band  and 
police  calls.  Walnut  cabinet  measures 
13%  x  8%  x  9%  inches.  Model  531— 
list  $49.95.  Pierce  Airo,  Inc.,  436 
Lafayette  St.,  New  York,  N.  Y. — 
Radio  Today. 


Gilfillan   receiver 

+  AC  operated  superhet  using  5 
glass  tubes.  Tunes  broadcast  band. 
AVC  —  dynamic  speaker.  Pentode 
power  output  stage.  Radio  log  dial. 
Mahogany  cabinet.  Model  5G8.  Gil- 
fillan Bros.,  Inc.,  1815  Venice  Blvd., 
Los  Angeles,  Calif. — Radio  Today. 


The  new  high-fidelity  "local"  receivers 
become  fine  musical  instruments  for 
fine  homes.  Here's  McMurdo  Silver's 
Orpheon,  announced  first  in  February. 
Note  "jewel-box"  tuner  beside  listener. 
Flat  under-rug  cable  connects  with 
speaker. 


Admiral  receivers 

■*■  5-tube  (including  plug-in  resis- 
tor) AC-DC  tuned  radio  frequency  re- 
ceiver. Tunes  2  band:  175  to  550  and 
800  to  2,000  meters.  Full-vision  type 
dial.  5-inch  dynamic  speaker.  Undis- 
torted  power  output  of  1%  watts. 
Cabinet  of  brown  or  ivory  bakelite. 
Set  measures  8%x6%x4%  inches. 
Model  516-5C.  Model  in  upper  right- 
hand  corner  is  a  5-tube  AC  superhet 
with  push-button  tuning.  Other  models 
not  illustrated  are  6-volt  6-tube  dual- 
band  farm  receiver,  and  6-tube  table 
type  phonograph  combination.  Conti- 
nental Radio  &  Television  Corp.,  3800 
Cortlandt  St.,  Chicago,  111. — Radio 
Today. 

Tiny  electrolytics 

*  Metal-can  electrolytic  condensers 
with  insulating  jacket.  Pig-tail  leads 
provide  support.  Available  in  4,  8,  12, 
16,  24.  30.  40  mfd  in  voltage  ratings  of 
100,  250,  450.  Dandee  electrolytics  de- 
signed for  use  where  space  and  cost 
are  prime  factors.  Aerovox  Corp.,  70 
Washington  St.,  Brooklyn,  N.  Y. — 
Radio  Today. 


Auto  radio  P.B.  unit 

*  Push-button  tuning  unit  for  use 
with  any  auto  radio.  Push-button 
control  can  be  attached  t'o  steering 
column  or  instrument  panel.  Manual 
control  fastened  to  or  below  instru- 
ment panel.  Tuning  mechanism  uses 
a  6-volt  motor  and  selects  up  to  5 
stations.  Mechanism  housed  in  case 
approximately  4%  x  3%  x  3  inches.  At- 
taches to  set  or  fire  wall.  F.  W. 
Stewart  Mfg.  Corp.,  340  W.  Huron  St., 
Chicago,  111. — Radio  Today. 


Fada  Coloradio 

+  5-tube  (including  plug-in  resis- 
tor) AC-DC  T.R.F.  table  type  receiver. 
Tunes  broadcast  band  and  police  calls. 
Beam  power  output  tube.  Series  450. 
In  walnut— list  112.95  FOB  factory, 
ivory  115.95  FOB.  Fada  Radio  &  Elec- 
tric Co.,  30-20  Thomson  Ave.,  Long 
Island  City,  N.  Y. — Radio  Today. 


"TUNE  UP"  RADIOS  FOR  SUMMER 

Eliminate   interference,    replace   antennas   and   tubes 


< 

ANTENNA 

ANTENNA- 

— 

-/ 

;y  M 

7 

. 

HOUSE  C 

HOUSE  B 

~ 3 

ll                       2]                                | 

HOUSE  A                                 || 

IISB1B 

C 

How  man-made  interference  is  transmitted  from  nearby  dwelling,  through  power 
lines  and  through  antenna  interaction. 


*  IN  more  than  one  hundred 
broadcasts  over  nationwide  networks 
of  NBC,  CBS  and  Mutual,  0.  H. 
Caldwell,  editor  of  Radio  Today,  has 
given  practical  advice  to  radio  listen- 
ers on  getting  their  sets  in  best  con- 
dition to  receive  the  great  program 
offerings  on  the  air.  The  following  is 
an  extract  from  one  of  these  coast-to- 
coast  broadcasts,  and  may  be  quoted 
by  radio  men  as  newspaper  text  or  on 
the  air,  in  any  way  that  will  benefit 
radio  reception. 

*       #       * 

To  determine  whether  the  noise 
arises  inside  the  radio  set  or  comes 
in  on  the  antenna,  the  simplest  test, 
of  course,  is  to  disconnect  the  an- 
tenna while  the  radio  set  is  still 
turned  on.  If  the  noise  continues 
with  little  change,  with  the  antenna 
disconnected,  the  trouble  is  some- 
where in  the  set.  Tubes  may  be  at 
fault.  This  may  be  tested  out  by  try- 
ing new  tubes  in  place  of  the  old 
ones,  one  by  one,  to  see  if  the  noise 
disappears. 

If,  however,  the  interference  is 
found  to  come  into  the  set  only  when 
the  antenna  is  connected  to  the  set, 
the  position  and  condition  of  the  an- 
tenna should  be  looked  into. 

No  better  than  antenna 

Do  not  be  satisfied  with  a  short 
indoor  antenna  if  you  want  good, 
clear  interference-free  reception.  In- 
stead use  an  outdoor  antenna  and  see 
that  your  antenna   is  up   as  high   as 


possible,  where  it  has  a  chance  to  pick 
up  a  strong  "signal"  from  the  broad- 
casting station,  while  at  the  same 
time  picking  up  a  minimum  of  inter- 
ference and  man-made  static  from 
the  wires  and  appliances  in  the  house. 
If  a  short  antenna  is  merely  run 
around  the  picture  molding  of  the 
room  (as  is  so  often  most  convenient 
to  do),  such  an  antenna  may  bring  in 
sufficient  volume,  but  it  also  brings 
in  considerable  interference  induced 
from  the  network  of  electrical  wires 
in  the  house,  electrical  appliances, 
etc.  So  that  at  times  the  amount  of 
"radio  noise"  picked  up  by  the  an- 
tenna, and  heard  in  the  set,  may  be 
very  disturbing.  Such  interference 
may  be  reduced  or  eliminated  at  its 


source  by  applying  condensers  or 
choke-coils  at  the  offending  appli- 
ances. To  do  this  work,  an  experi- 
enced radio  serviceman  should  be 
called  in. 

In,  on  the  other  hand,  the  antenna 
is  mounted  high  above  the  house  or 
runs  off  from  the  house,  high  above 
the  ground,  the  antenna  will  get  a 
minimum  of  noise  and  a  maximum 
of  broadcasting.  The  intensity  of  the 
noise  will  then  be  so  far  below  that 
of  the  broadcast  signal,  that  the  noise 
will  not  be  noticeable.  So  in  this 
way,  by  means  of  a  high  antenna,  one 
usually  puts  an  end  to  interference 
from  local  electrical  causes  in  the 
house,  and  at  the  same  time  brings 
in  clearer,  louder  signals  from  the 
broadcast  station,  greatly  improving 
the  quality  of  reception. 

The  wire  leading  down  from  such  a 
high  antenna  to  the  radio  set  may  pass 
right  through  the  interference  area 
of  the  electric  wiring  and  electrical 
appliances.  To  avoid  this  the  new 
scientific  twisted-pair  lead-in  may  be 
used.  This  shields  the  antenna  from 
interference  which  would  otherwise 
reach  the  antenna  wire  and  be  car- 
ried into  the  set.  Many  good  anten- 
nas are  on  the  market  which  improve 
reception  on  both  the  broadcast  chan- 
nels  and   short-waves. 

Abofe  all  else  the  answer  to  clear, 
interference-free  reception  is  an  ade- 
quate antenna,  installed  as  high  as 
possible  and  far  away  from  the  house 
wiring  and   appliances. 


Methods  of  installing  condensers  and  chokes  to  cut  out  interference. 


16 


Radio  Today 


RCA  Victor's  "Magazine  within  a 

Magazine"  in  "Life" April  4, 1938, 

tells  14,000,000  readers  about 

new  Victor  Record  vogue 

Everywhere  Americans  are  eager  to 
join  the  Victor  Record  Society!  They 
proved  it  in  the  sensationally  suc- 
cessful Wilmington  trial.  And— right 
now  —  they're  proving  it  in  every 
section  of  the  country! 

That's  the  reason  why  RCA  Victor 
is  devoting  the  entire  next  issue  of 
"Listen"  to  the  Victor  Record 
Society.  On  April  4th,  1938,  five  ex- 
citing, colorful  pages  in  "Life"  will 
blast  this  important  news  to  millions 


of  music  lovers  all  over  America. 

And  that's  just  one  part  of  a 
$500,000  Campaign  which  in- 
cludes the  Magic  Key,  the  Victor 
Record  Programs,  National  Maga- 
zines and  Newspapers. 

Your  biggest  business-building 
chance  in  years! 

Even  before  the  Victor  Record 
Society  started,  Victor  Record  sales 
had  soared  575%  above  '33.  Now — 
with  this  sensational  new  sales-mak- 
ing plan — you're  offered  the  greatest 
single  profit-making  opportunity  in 
years!  So  don't  wait!  Start  cashing 
in  now!  See  your  distributor  at  once 
for  full  information  and  sales  helps! 


RCA  VICTOR  RECORD  PLAYER  -R-93-B 

Plays  Records  Through  Any 
Modern  A  C  Radio! 


This  is  the  Record  Player  Victor 
Record  Society  members  receive  at 
no  cost.  Plays  records  with  full  tone 
of  the  radio.  Can  be  played  from  arm- 
chair. No  getting  up  to  change  records. 
List  price  J14.95.  See  your  distributor. 


Over  325  million  RCA  radio  tubes  have  been  purchased  by 
radio  users  ...  In  tubes,  as  in  radio  sets,  it  pays  to  go  RCA 
All  The  Way. 


Listen  to  the  "Magic  Key  of  RCA"  every  Sunday  afternoon  at  2:00.  E.  S.  T..  over  the  NBC  Blue  Network. 

RADIO'S 

GREATEST 

VALUE 

A  SERVICE  OF  THE  RADIO  CORPORATION  OF  AMERICA 

April,  1938 


17 


NEW  THINGS 

Latest   news   of  radio   products   from    the  manufacturers 


Utah  speakers 

+  3y2  -  inch  dynamic  speakers 
featuring  PM  and  electrically  ex- 
cited fields.  Will  handle  five  watts. 
Zy%  -  ohm  voice  coil.  Frequency 
range  of  200  to  8,000  cycles.  EE 
model  has  450-ohm  field  requiring 
3  to  6  watts  excitation.  Utah  Radio 
Products  Co.,  820  Orleans  St.,  Chi- 
cago, 111. — Radto  Today — see  also 
advt.  p.  51. 


Push-button  tuning  motor 

•k  Dependable,  low  -  cost  motor 
for  push-button  tuning.  Self-align- 
ing, oilless  bearings  guarantee  per- 
manent shaft  alignment  and  noise- 
less operation.  Thermostatic  pro- 
tection. Measures  only  2%x2%x 
1%  inches.  Mounting  and  gear  as- 
semblies to  specification.  Model  P. 
Alliance  Mfg.  Co.,  Alliance.  Ohio. 
■ — Radio  Today. 


Jensen  replacement  speakers 

+  Low-cost  line  of  speakers  for 
replacement  purposes.  Made  in  5,  6, 
8-inch  sizes.  Fixed  or  adjustable 
impedance  transformers,  wide  as- 
sortment of  field  coil  resistances. 
Series  "S."  Jensen  Radio  Mfg.  Co., 
6601  S.  Laramie  Ave.,  Chicago,  111. 
— Radio  Today. 


Tobe  weatherproof  filterette 

*  Weatherproof  noise  filter  unit 
for  outdoor  installation  on  police  call 
relays.  Eliminates  noise  occurring 
from  flashing  lights  used  in  police 
recall  systems.  Unit  is  contained  in 
weatherproof,  cast  iron  housing  for 
of  inductance  and  capacity  to  prevent 
the  feedback  of  interference  to  the 
electric  power  supply  line  or  its  dis- 
tribution along  the  wiring  between 
the  relay  and  the  call  lamp.  Tobe 
Deutschmann  Corp.,  Canton,  Mass. — 
Radio  Today. 


Ceramic  condenser 

*  Fixed  condenser  with  temper- 
ature coefficient  designed  to  com- 
pensate for  temperature  changes 
in  radio  set.  Available  in  tempera- 
ture coefficient  from  — .00060  to  0. 
Capacitances  from  10  to  1,000  micro- 
mikes  are  available.  Small  mass 
permits  following  of  ambient  tem- 
perature with  minimum  of  lag.  De- 
scribed fully  in  Bulletin  No.  20. 
Centralab  900,  E.  Keefe  Ave.,  Mil- 
waukee, Wis.  —  Radio  Today  —  see 
also  advt.  p.  54. 


Mutual  conductance  tube 
tester 

+  Counter  and  portable  type 
tube  checkers  employing  dynamic 
mutual  conductance  test  principle. 
Uses  square  meter  with  translucent 
illuminated  dial.  Indicates  tube 
value  in  microhms  and  "good,  bad, 
doubtful."  Sufficient  plate  current 
to  check  emission.  Checks  gas  con- 
tent and  open  and  shorted  elements. 
Models  T-54-P  and  T-54-C — net 
$49.80.  Hickok  Electrical  Instru- 
ment Co.,  10514  DuPont  Ave.,  Cleve- 
land, Ohio — Radio  Today. 


Lauson  engines 

■*  Air-cooled  four-cycle  gas  en- 
gines of  compact  dimensions.  Rat- 
ings of  %,  %,  and  1  H.P.  Ball 
bearings.  Extremely  light  weight. 
Dust-sealed  magnetos,  oil  bath  air 
cleaners.  Lauson  Co.,  New  Holstein, 
Wis. — Radio  Today1. 


Heavy-duty  R.F.  choke 

*  Duo-lateral  type  choke  for  ra- 
dio interference  filtering.  Rated  at 
150  amps  DC.  12-inch  diameter 
winding  of  No.  1  B  &  S  gauge  flex- 
ible cable.  Used  in  installations 
such  as  large  flashing  signs.  J.  W. 
Miller  Co.,  5917  S.  Main  St.,  Los 
Angeles,  Calif. — Radio  Today. 


Hy-tower  charger 

+  Wind-driven  battery  charger 
made  entirely  of  steel  except  for 
propeller  and  generator  end  plates. 
Non-arcing  collector  ring.  '"Slip- 
the-wind"  governing  principle.  Vi- 
bration and  tail  vane  fluttering 
eliminated.  Parris-Dunn  Corp., 
Clarinda,  Iowa — Radio  Today — see 
also  advt,  p.  53. 


18 


Radio  Today 


ilfSfi 


MEANS  PROFIT  TO  YOU! 


...because  you  can  now  obtain  valuable 
merchandise  awards  with  the  purchase  of 

RCA  RADIOTRONS.' 


T'HE  Radiotron  Trading  Post  Catalog  con- 
tains more  than  200  of  the  finest  merchan- 
dise awards  chosen  from  the  Grade  "A"  stocks 
of  reliable  manufacturers.  Items  for  your  home, 
your  office — gifts  for  your  wife,  mother  and 
children — or  for  your  own  personal  use. 

Ask  your  Radiotron  Distributor  for  a  copy 
oftheRadiotronTradingPostCatalog.  Choose 
the  awards  you  want... and  they  are  yours — 
ABSOLUTELY  FREE— with  the  purchase 
of  RCA  Radiotrons. 

MODERNIZE  YOUR  SERVICE  SHOP 

with  RCA  Test  Equipment.  Ask  your  local  RCA 
Radiotron  Distributor  how  you  can  obtain  the 
many  pieces  of  RCA  Test  Equipment,  as  well  as 
Public  Address  Systems,  FREE  with  the  purchase 
of  RCA  Radiotrons. 


RCA  Presents  the  Magic 
Key  every  Sunday,  2 
P.M.,  E.S.T.onthe 
Blue  Network. 


OVER  325  MILLION  RCA  RADIO  TUBES  HAVE  BEEN  PURCHASED 

by  radio  users  ...  in  tubes,  as  in  radio  sets,  it  pays  to  go  RCA  ALL  THE  WAY. 


April,  1938 


19 


SEASONAL  APPLIANCES 


a  3-day  showing  of  Slielvadors  and 
Mystic  Ovens.  Guests  predicted  a  big 
year  in  1938  at  the  banquets  and  dis- 
plays at  local  hotels.  Crosley  district 
manager  P.  W.  Bailkowsky  was  on 
hand. 


ASSISTANCE  IN  SELLING 
SMALL  LINES 

*  For  the  sales  personnel  of  ap- 
pliance stores  in  Washington,  D.  C, 
the  Electric  Institute  of  that  city 
conducted  a  sales  course  which  has 
flagged  the  attention  of  the  industry. 
The  course  presented  detailed  infor- 
mation for  selling  electric  mixers, 
percolators  and  coffee  makers,  roast- 
ers, waffle  irons,  sandwich  grills, 
toasters,  hot  plates,  casseroles,  chafing 
dishes,  electric  irons,  heaters  and 
electric  fans. 

To  begin  with,  the  Institute  sum- 
marizes the  reasons  why  people  buy: 

1.  Comfort  and  convenience. 

2.  Safety  and  protection. 

3.  Gain  and  economy. 

4.  Satisfaction  and  affection. 

5.  Pride   of   ownership. 

For  each  appliance  the  course  first 
describes  fundamental  structure, 
moves  on  to  "how  to  sell"  suggestions 
of  a  specific  nature,  and  lists  "cus- 
tomer-catchers." 

For  a  brief  sample  of  how  small 
appliances  are  dealt  with  in  this 
course,  we  quote  from  the  section  on 
electric  fans : 

"While  fans  are  distinctly  a  sea- 
sonal item  whose  main  function  is  to 
circulate  the  air  in  hot  weather,  they 
do  have  other  uses.     In  winter  a  fan 


Howard  J.  Tyzzer  is  now  chief  engi- 
neer of  the  household  radio  division  of 
Crosley  Radio  Corp.  With  Crosley 
since  1933,  he's  been  in  radio  for  27 
years,  and  has  several  inventions  and 
patents   to   his   credit. 


will  help  distribute  the  heat  in  a 
room  if  placed  where  it  will  blow  air 
into  the  radiator. 

"Set  in  the  kitchen  window,  a  fan 
will  ventilate  the  kitchen.  Drawing 
the  fresh  air  in  will  tend  to  expel  the 
stale  air  and  odors.  For  ventilating 
a  closet — to  freshen  the  air  or  to  ex- 
pel the  odor  of  moth  preventatives, 
set  a  fan  so  that  it  will  blow  air  into 
the  closet. 

"When  clothes  must  be  dried  in- 
doors, a  fan  placed  to  circulate  air 
around  and  through  the  wet  garments 
will  speed  up  the  drying  process. 
When  used  in  conjunction  with  a 
heater,  the  drying  time  will  be  short- 
ened even  more.  Whether  for  drying 
purposes  or  for  room  heating,  a  fan 
placed  before  a  radiant  heater  will 
distribute  the  heat  more  generally 
throughout  the  room  than  is  possible 
with  the  heater  alone. 

"The  current  taken  by  fans  is  usu- 
ally expressed  in  amperes.  The  house- 
hold fans  have,  on  the  average,  mo- 
tors of  from  0.5  to  1  amps.  The  op- 
erating cost  for  these  fans  would  be 
around  one  cent  for  four  hours' 
operation." 

Managing  director  of  the  Institute 
is  J.  S.  Bartlett.  Presentation  of  the 
sales  course  was  under  the  personal 
supervision  of  Miss  Bernice  Burns 
of  the  Institute's  Home  Economics 
staff. 


Governair  room  coolers 

■*  Air  conditioners  designed  for 
cooling,  ventilating,  cleansing,  circu- 
lating, and  dehumidifying.  Come  in 
three  models:  Vz,  %,  and  1  H.P.  First 
model  has  reciprocating  type  com- 
pressor, extended  surface  type  con- 
denser, centrifugal  air  blower,  welded 
steel  frame,  Freon  refrigerant,  roller 
bearing  casters.  Capacity  rated  as 
6,400  B.T.U.  per  hour.  Cabinet  finished 
in  natural  black  walnut.  Governair 
Corp.,  603  W.  Main  St.,  Oklahoma  City, 
Okla. — Radio  Today. 


Press  Kloth 

+  A  patented  process  pressing 
cloth,  of  heavy  cotton  material,  spe- 
cially treated  and  prepared  to  resist 
water.  As  hot  iron  is  applied,  the 
steam  created  by  water  lying  on  the 
surface  of  the  Kloth  penetrates  the 
Press  fabric  and  a  professional  steam 
press  is  the  result.  Iron  slides  freely; 
no  "press"  shine.  Parris-Dunn  Corp., 
Clarinda,  Iowa — Radio  Today. 

•k  Marshall  Wells  Co.,  Crosley  dis- 
tributors in  the  Spokane,  Wash.,  area, 
were  recently  hosts  to  117  dealers  at 


*  Norge  has  opened  its  first  big 
promotion  drive  of  the  year  by  featur- 
ing "the  ability  of  its  smallest  Rollator 
compressing  mechanism  to  power  three 
Norge  refrigerators  while  running  only 
one-third  of  the  time  in  a  70-degree 
room."  Drive  includes  greatly  en- 
larged space  in  leading  magazines, 
newspaper  ads  in  75  key  cities,  etc. 

•k  The  Pleasantaire  factory  in 
Brooklyn,  N.  Y.,  is  now  booked  up  on 
orders  for  its  portable  room  cooler 
through  late  April  and  is  accepting 
orders  for  early  May,  according  to 
news  from  president  Richard  F.  Roper 
of  Pleasantaire  Corp.,  1623  Connecti- 
cut Ave.,  Washington,  D.  C. 

*■  Sales  headquarters  for  the  new 
Steem  Electric  iron  have  been  estab- 
lished at  11  W.  42nd  St.,  New  York 
City. 


RECEIVER  KIT 


•k  New  Brow-ning  83  receiver  kit 
has  been  designed  so  that  the  set  can 
be  assembled  easily  by  radiomen  or 
even  the  novice  in  a  short  time.  While 
designed  primarily  as  a  chassis  for 
modernizing  old  radio  sets,  it  is  also 
wrell-adapted  for  use  in  the  country  or 
while  vacationing.  A  6-volt  model 
suitable  for  this  purpose  is  available  in 
addition    to   the   standard    AC    model. 

The  accompanying  picture  shows  the 
Browning  83  mounted  in  trailer.  All- 
wave  reception  extending  up  to  22,000 
KC  is  provided.  Receiver  is  assembled 
with  a  screw  driver,  pliers,  and  solder- 
ing iron.  Adjustment  problems  re- 
duced to  a  minimum — no  signal  gen- 
erator is  needed. 

The  tuner  unit  is  completely  assem- 
bled and  aligned  before  shipment.  Com- 
plete instructions  and  full-scale  wiring 
diagrams  are  furnished.  Another  fea- 
ture   of    this    receiver    kit    offered    by 


Browning  Labs,  is  that  the  builder  can 
incorporate  minor  changes  in  or  addi- 
tions to  the  circuit.  Noise  suppression, 
volume  range  expansion,  etc.,  are  eas- 
ily added  since  spare  holes  are  pro- 
vided. 


20 


Radio  Today 


A  switch  is  thrown ...  a  motor  hums 
...giant  metal  "teeth"  start  to 
grind— and  it's  goodbye  to  imper- 
fect tubes! 

That's  how  "the  crusher"  works. 
Now  we'll  tell  you  why: 

To  insure  uniform,  high  quality 
. . .  Sylvania  tests  each  tube  scores 
of  times— for  materials ...  for  con- 
struction . . .  for  performance.  And 


thanks  to  a  strict  "no  repair"  pol- 
icy—any tube  that  fails  even  one  of 
these  tests  is  sent  to  "the  crusher" 
. . .  completely  destroyed! 

Never  a  "dud".  .  .  never  a  sec- 
ond-quality Sylvania  tube.  For 
Sylvania— in  accordance  with  this 
rigid  policy  —  destroys  defectives 
instead  of  repairing  them.  Re- 
member this  when  you  buy. 


HYGRADE   SYLVANIA    CORPORATION 

Emporium,  Pa.  •  Also  makers  of  the 

famous  Hygrade  Lamp  Bulbs 


SYLVANIA 


RADIO       TUBES 


April,  1938 


21 


DYNAMIC  ANALYSIS  OF  FILTERS 

Theoretical  analysis  of  how  R,  C,  and  L  are  used  For  filtering  and 
by-passing  in  the  power,   AF,  and    RF  sections  of  a   radio   set 


By  Vixtox  K.  Ulrich 
Service  Editor,  Radio  Today 

*  In  recent  conversations  with  ser- 
vicemen, it  has  been  apparent  that 
there  are  many  who  are  not  fully  ac- 
quainted with  the  characteristics  of 
resistors,  condensers,  and  inductances. 
So  before  going  into  the  actual  pro- 
cedure of  Dynamic  Testing,  there  will 
be  a  brief  outline  of  basic  radio  prin- 
ciples, showing  how  R,  L,  and  C  be- 
have at  various  frequencies  and  in 
combination  with  one  another. 

A  condenser  (paper)  has  an  infinite 
resistance  to  DC  voltages  and  a  finite 
reactance  (AC  resistance)  to  AC  volt' 
ages.  The  reactance  of  a  condenser 
varies  with  frequency;  at  low  fre- 
quencies the  AC  resistance  is  high, 
while  at  higher  frequencies  the  AC 
resistance  may  be  low  enough  to  con- 
sider the  condenser  as  a  short  circuit 
(although  it  actually  has  some  react- 
ance). 

Reactance  vs.  frequency 

An  ordinary  AC  voltmeter  on  a  60- 
cycle  line  will  readily  show  how  the 
AC  resistance  of  condensers  varies 
with  the  size.  The  circuit  is  shown  in 
Fig.  1.  If  the  condenser  is  1  mike,  it 
has  about  2,500  ohms  reactance 
(AC  resistance).  If  connected  in  series 
with  a  150  volt  AC  meter  on  110  volts 
having  150,000  ohms  internal  resist- 
ance, the  added  resistance  would  have 
practically  no  effect  and  meter  would 
read  approximately  110  volts.  A  .01 
condenser  has  250,000  ohms  reactance 
at  60  cycles,  so  if  connected  in  series 
with  the  voltmeter,  the  combined  re- 
sistance and  reactance  would  give  less 
than  half-scale  reading  on  the  meter. 
This   is   the   principle   used    in   meter 


RS53SH 

TV)                         "°VAC 

' vA/WVV —    ||_             • 

vR 
FIG.  1 

c 
FIG.2-A 

R 
1 — AWWW-   1 

1— vAAAAAAA — ' 
Xc 
FIG.2-B 

Fig.  1 — A  condenser  in  an  AC  circuit 

acts  as  a  resistor  which  changes  with 

frequency. 

type  capacity  indicators.  The  fact  that 
a  condenser  has  an  AC  resistance  is 
readily  shown  by  the  above  illustra- 
tions. (In  this  and  other  illustrations 
in  this  article,  phase  relationships  are 
being  disregarded  so  as  not  to  com- 
plicate  the    discussion.) 

As  far  as  frequency  is  concerned,  the 
reactance  of  the  condenser  varies  op- 
positely to  the  frequency  as  shown  be- 
low: 

1  microfarad  condenser  (approx.) 

6  cycles 25,000  ohms 

60  cycles 2,500  ohms 

600  cycles 250  ohms 

6,000  cycles 25  ohms 

60,000  cycles 2%  ohms 

600  kilocycles %  ohm 

This  characteristic  can  be  easily 
shown  by  using  a  high  sensitivity  AC 
voltmeter  in  series  with  a  .01  to  .1 
condenser  across  the  output  of  a  re- 
ceiver when  a  400-cycle  note  is  being 
supplied  from  the  signal  generator. 
Higher  readings  will  always  be  ob- 
tained on  400  cycles  than  on  60  be- 
cause the  reactance  of  the  condenser 
is  less  on  400  cycles.  If  the  serviceman 
will  think  of  a  condenser  as  an  AC  re- 


,  R 
vVWW  I 

z-c,            tW     RL| 

=  H     S 

FJG.3-A 

R 
T \AAAVv— ] 

|XC|         XcJ       RL| 

FIG.4-A 

Xl 
1          WAAAl T 

|X.              X.  I    RL| 

FIG.3-B 

FIG.4-B 

Fig.  3 — Equivalent  circuit  of  a  simple 
resistance-capacity    filter,     using    con- 
densers. 


Fig.  4 — An  inductance  offers  a  resist- 
ance  to   AC    currents   which   changes 
with  frequency. 


Fig.  2 — The  capacitive  reactance  of  a 
condenser  is  equivalent  to  an  AC   re- 
sistance. 

sistance  or  reactance  having  an  ohmic 
value,  it  will  be  easier  to  understand 
circuit  operation.  Of  course,  the 
serviceman  must  bear  in  mind  that  if 
he  changes  the  frequency,  the  react- 
ance will  change. 

In  Fig.  2-A  a  condenser  and  a  re- 
sistor in  parallel  are  shown  to  illus- 
trate the  case  where  a  by-pass  con- 
denser is  used  across  the  cathode  re- 
sistor. This  condenser  can  be  replaced 
by  a  reactance  or  AC  resistance  in  par- 
allel with  the  cathode  resistor  as  shown 
in  Fig.  2-B  (speaking  in  terms  of  AC, 
not  DC).  If  this  condenser  had  about  10 
mikes  capacity,  it  would  represent  250 
ohms  at  60  cycles  and  25  at  600  cycles. 
If  the  cathode  resistor  were  2,500  ohms, 
then  at  60  cycles,  approximately  90 
per  cent  of  the  AC  current  would  pass 
through  the  condenser.  And  at  600 
cycles  99  per  cent  of  the  current  would 
pass  through  the  condenser. 

As  all  servicemen  know,  or  should,  a 
by-pass  condenser  is  used  for  the  pur- 
pose of  shunting  the  AC  current  to 
ground  so  as  to  eliminate  the  AC  volt- 
age present.  Or  looking  at  it  another 
way,  if  only  1/10  of  the  AC  current 
flows  through  the  cathode  resistor,  the 
AC  voltage  across  the  resistor  will  be 
reduced  to  1/10. 

Similarly  in  an  I.F.  or  R.F.  amplifier 
a  300  to  1000  ohm  cathode  resistor  is 
shunted  with  a  .1  condenser.  At  600 
KC  this  condenser  will  have  a  react- 
ance of  2%  ohms.  This  2%  ohm  react- 
ance or  AC  resistance  is  practically  a 
short  circuit  across  the  cathode  resistor 
as  far  as  R.F.  currents  are  concerned, 
although  it  has  no  effect  on  the  DC 
bias.  In  most  circuits  even  a  .01  con- 
denser would  be  okay  since  it  has  a  25 
ohm  reactance  at  600  KC,  which  is  less 
than  1/10  of  the  usual  I.F.  bias  re- 
sistors. 

As  the  frequency  increases  it  is  pos- 


22 


Radio  Today 


sible  to  use  smaller  and  smaller  by- 
pass condensers,  since  with  increasing 
frequencies  the  reactance  decreases. 

In  all  by-pass  and  filtering  circuits, 
it  is  the  ratio  of  capacitive  reactance- 
to  the  resistance  that  counts.  If  the 
resistor  is  decreased  in  value,  and  the 
same  degree  of  filtering  is  needed,  then 
a  larger  condenser  must  be  used.  This 
is  one  of  the  bases  of  the  dynamic 
method  of  servicing. 

AVhat  the  radio  servicemen  are  in- 
terested in,  is  whether  or  not  there  is 
enough  by-passing  action  in  the  cir- 
cuit. What  the  actual  value  of  the 
capacitor  is,  does  not  matter  in  the 
least.  (This  does  not  apply  to  tuned 
circuits).  In  fact  some  very  large  con- 
densers, due  to  their  method  of  con- 
struction, have  a  much  higher  R.F. 
reactance  than  their  capacity  would 
indicate.  That  is  why  electrolytics  and 
inductivity  wound  paper  units  are  not 
used  in  R.F.  circuits. 

And  the  only  way  to  tell  if  a  con- 
denser is  properly  working  on  R.F. 
is  test  it  on  R.F.,  which  to  the  ser- 
viceman means  in  the  radio  set.  In  dy- 
namic testing  we  are  developing  a 
test  which  will  show  whether  or  not 
the  condensers  are  working  satisfac- 
torily at  their  operating  frequencies. 
And  then  on  A.F.  or  even  60  cycles, 
there  is  the  leakage  factor  in  electro- 
lytic condensers.  A  unit  which  may 
be  okay  in  one  circuit,  may  have  too 
much  leakage  for  another.  Again  the 
best  way  of  determining  if  the  unit 
is  okay  is  to  test  while  circuit  is  in 
operation  which  is  dynamic  servicing. 

Audio  decouplers 

In  Fig.  3-A  the  circuit  is  that  used 
in  many  resistance-coupled  audio  am- 
plifiers. Often  the  resistor  and  C-2 
combination  is  called  an  audio  filter 
or  audio  decoupler.  C-l  is  the  con- 
denser in  the  main  filter.  Since  the 
reactance  of  C-l  is  usually  a  fraction 
of  the  resistance  R,  the  power  supply 
filtering  is  greatly  improved.  Usual 
values  are  C-2,  1  mike:  R,  20,000  ohms. 
The  equivalent  AC  circuit  is  shown  in 
3-B.  C-l  by-passes  the  largest  part  of 
the  AC  ripples  to  ground.  C-2  also  has 
a  low  AC  resistance  (2,500  ohm  react- 
ance at  60  cycles)  and  compared  to  the 
load  resistance  R-L,  so  it  also  by-passes 
some  AC  ripple. 

But  more  important,  condenser  C-2 
provides  an  audio  filtering.  In  this 
case  the  filter  may  be  looked  upon  as 
operating  from  right  to  left.  Because 
condenser  C-2  has  a  2,500  ohm  (60 
cycles)  reactance  in  comparison  to 
20,000  for  R,  the  greatest  part  of  the 
audio  currents  present  are  by-passed 
to  ground  through  C-2.  In  this  way, 
the  audio  currents  are  eliminated  be- 
fore they  can  get  back  to  the  power 
supply  unit.  Naturally  the  value  of 
R  is  made  as  great  as  possible  without 
causing  too  great  a  DC  voltage  drop 
across  itself.  If  the  load  R-L  is  so 
great  as  to  require  that  R  be  rather 
small  in  order  to  avoid  a  large  DC 
drop,  then  the  condenser  C-2  must  also 
be  made  larger. 


R.F.  filters 

This  same  type  of  circuit  is  found  in 
the  screen  and  plate  circuits  of  R.F. 
and  I.F.  amplifiers  in  some  types  of 
receivers.  For  instance  some  sets  use 
a  5,000  ohm  plate  series  resistor  and 
.1  by-pass  condenser.  At  600  KC  the 
condenser  has  a  reactance  of  about 
2%  ohms.  This  is  a  ratio  of  2,000  to 
1.  Consequently  approximately  1/2,000 
of  the  voltage  feeds  back  across  R  and 
the  1,999/2,000  is  by-passed  by  C-2. 

In  the  resistance-capacity  filter  cir- 
cuits, the  capacitive  reactance  varies 
with  frequency  while  the  resistance 
remains  constant.  In  Fig.  4-A  an  in- 
ductance is  used  instead  of  the  resistor. 
For  R.F.  it  would  be  an  R.F.  choke, 
while  for  audio  it  would  be  a  large 
iron-core  choke. 

In  previous  paragraphs  it  has  been 
pointed  out  that  the  reactance  (AC  re- 
sistance) of  a  condenser  decreases  with 
an  increasing  frequency.  Just  the  op- 
posite is  true  with  an  inductance.  To 
DC  the  inductance  offers  no  resistance 
(except  the  DC  ohmic  value).  As 
the  frequency  increases  the  AC  re- 
sistance of  the  inductance  increases. 
Therefore  inductances  are  used  in  cir- 
cuits to  carry  DC  current  while  offer- 
ing a  resistance  to  AC  currents. 

Inductance  filtering 

In  Fig.  4-B,  the  inductance  has  been 
replaced  by  its  equivalent  reactance  or 
AC  resistance.  If  the  inductance  had 
13  henries,  the  reactance  at  60  cycles 
would  be  equal  to  5,000  ohms.  The 
condenser  C-l  might  have  8  mikes 
which  would  give  it  about  300  ohms 
reactance.  The  division  in  the  AC  cur- 
rents is  similar  to  that  occurring  with 
a  resistor.  At  600  cycles  the  capacitive 
reactance  would  have  decreased  to  30 
ohms  and  the  inductive  increased  to 
50,000  ohms.  This  indicates  that  if 
the  circuit  works  okay  at  the  lowest 


audio  frequency,  it  will  work  even  bet- 
ter at  the  higher  frequencies.  There- 
fore tests  would  be  made  at  the  lowest 
frequency  at  which  circuit  must  work. 

In  an  R.F.  circuit  the  inductance 
might  have  a  value  of  10  millihenries 
and  the  condenser  about  .1  mfd.  The 
ratio  of  inductive  to  capacitive  react- 
ance will  be  on  the  same  order  as  that 
discussed  in  the  preceding  illustration. 

Chokes  of  both  the  R.F.  and  A.F. 
type  are  used  chiefly  to  avoid  having 
a  large  DC  drop.  If  the  DC  drop  is 
negligible,  a  resistor  is  usually  em- 
pjoy  d  so   '     to  reduce  cost  and  space. 

It  should  be  kept  in  mind  that  in 
every  illustration  given  above,  the 
item  that  is  most  important  is  the  re- 
actance or  AC  resistance  of  the  circuit 
elements.  Or  sometimes  the  term  im- 
pedance is  used — impedance  being  the 
vector  combination  of  resistance  and 
reactance.  And  since  it  is  the  AC  re- 
sistance that  counts,  tests  must  be 
made  over  the  normal  range  of  AC 
frequencies  at  which  the  unit  must  op- 
erate. That  is  the  basis  of  dynamic 
servicing    or    testing. 

TONE  CONTROL  BY  INVERSE 
FEEDBACK 

*  Now  that  inverse  feedback  or  de- 
generation is  becoming  better  known  it 
it  being  used  in  a  variety  of  ways.  It 
is  used  to  reduce  distortion  and  to  com- 
pensate for  frequency  discrimination 
in  amplifiers.  Newest  use  is  to  provide 
a  variable  frequency  response  charac- 
teristic in  a  tone  control  circuit. 

Accompanying  circuit  is  used  in  the 
more  powerful  Thordarson  amplifiers. 
Two  controls  are  used — one  for  high 
end  and  the  other  for  the  low.  Unlike 
most  tone  controls,  these  controls  can 
either  raise  or  lower  the  response  at 
their  own  end  of  the  band. 
(To  next  page) 


April,  1938 


Inverse-feedback  is  used  to  provide  a  variable  frequency  characteristic.    Two  sets 
of  ganged  controls   provide  variation  as  required. 

23 


MORE  SERVICE  NOTES 


(From  preceding  page) 


Mechanically  the  two  controls  are 
somewhat  unusual.  Half  of  the  con- 
trol is  zero  resistance.  If  the  pointer 
of  the  upper  control  is  on  the  resis- 
tance element,  then  the  pointer  of  the 
lower  control  is  on  the  short-circuiting 
element  and  vice-versa.  For  normal 
setting  the  pointers  are  at  the  mid- 
point of  the  control  just  resting  on 
the  zero-resistance  element. 

Thus  for  normal  setting  the  arms  of 
the  four  controls  are  grounded.  When 
the  contact  on  R-6  is  advanced  toward 
C-5,  L-l  is  grounded  at  the  top  end 
and  connected  across  R-3  through  C-5. 
This  means,  that  for  low  frequencies, 
the  combination  of  R-3  and  C-5,  L-l 
provides  a  lower  impedance.  As  a  re- 
sult the  degeneration  caused  by  R-3  in 
the  cathode  circuit  is  decreased  on  low 
frequencies,  giving  a  boost  in  the  low 
response. 

Similarly  if  the  arm  on  R-4  is  moved 
down  to  C-5,  the  cathode  circuit  degen- 
eration is  decreased  for  the  higher  fre- 
quencies giving  a  resultant  boost  in  the 
highs  of  the  amplifier. 

The  paralleled  impedance  of  R-5  and 
R-7  form  the  grid  return  for  the  fol- 
lowing tube  and  if  C-l  or  L-l  is  moved 
toward  the  grid  end  of  the  following 
tube,  high  or  low  frequency  attenua- 
tion results. 

If  the  contact  on  R-7  is  moved  to- 
ward the  grid  end,  then  L-l  is  con- 
nected from  ground  to  grid.  Since  the 
impedance   of  L-l   is   less   at   low   fre- 


quencies than  high,  the  low-frequency 
response  is  decreased.  And  likewise 
when  C-l  is  at  the  grid  end  of  R-5,  the 
impedance  is  less  at  high  frequencies. 
In  fact  it  acts  like  the  usual  tone  con- 
trol in  a  radio  set,  causing  high-fre- 
quency attenuation. 

C-3  was  added  to  increase  the  high 
frequency  attenuation  since  the  value 
of  C-l,  although  correct  for  high  fre- 
quency boost,  did  not  provide  enough 
high  frequency  attenuation.  R-2  and 
C-2  provide  the  normal  operating  bias 
for  the  6C5  tube. 

Since  the  grid  return  through  R-l  is 
connected  to  the  "cold"  end  of  the  bias 
network,  R-3  is  the  DC  return  for  the 
plate  current.  C-5  is  provided  to  elim- 
inate the  DC  flow  through  the  choke, 
since  the  DC  resulted  in  noisy  opera- 
tion because  the  DC  current  was  ac- 
tually passed  through  the  contact  arm 
of  R-6. 

ADMIRAL  8K  &  8KU 

+  Eight  tubes  are  employed  in  the 
Admiral  8K  receivers.  The  8K  is  de- 
signed for  American  use  and  tunes  on 
three  bands.  The  8KU  is  for  Euro- 
pean service  and  has  a  long-wave,  band 
instead  of  the  police  band. 

Set  uses  a  pre-selector  antenna  stage 
on  the  broadcast  band.  On  the  other 
bands  the  set  uses  a  2-gang  condenser 
circuit. 


The  tube-line-up  and  circuit  of  the 
receiver  is  conventional.  A  phase  in- 
verter is  used  for  the  push-pull  output 
stage.  Note  that  the  75  tube  gets  its 
bias  from  a  tap  on  the  76  cathode  bias 
resistor. 

Alignment  frequencies  and  trimmer 
locations  are  shown  on  the  chassis 
layout  diagram. 

SETTING  UP  PUSH-BUTTON  SETS 

•  Servicemen  setting  up  push- 
button sets  having  more  buttons  than 
there  are  stations  providing  consis- 
tent reception,  should  explain  to  the 
customer  that  there  will  be  times 
when  some  of  the  stations  will  not 
provide  satisfactory  reception.  For 
in  many  locations  only  some  six  or 
eight  stations  provide  consistent  re- 
ception, while  in  remote  areas  this 
number  may  dwindle  to  two  or  three. 

Consequently  when  the  customer 
pushes  the  button  for  a  station  that 
may  be  fading  or  have  insufficient 
signal  to  be  heard,  the  radio  set  is 
often  blamed. 

Some  servicemen  set  up  the  re- 
ceivers only  to  those  stations  that 
provide  consistent,  quality  reception 
and  leave  the  remaining  buttons 
blank.  While  this  may  be  easiest 
from  the  dealer's  point  of  view,  we 
feel  that  every  button  should  be  used 
— otherwise  the  customer  may  feel 
that  he  is  getting  only  part  of  the 
receiver's  full  performance.  If  only 
eight  out  of  sixteen  buttons  are  used, 
to  the  layman  it  may  appear  that 
(Continued  on  page  26) 


ADMIRAL  MODELS  8K  &  8KU 


PHI 


F.   PEAK  456  KC 


The  article  below  appeared  in  last  month's  issue  of  this  publication 
If  you  failed  to  read  it,  dig  out  last  month's  copy  and  do  so. 


vein 


■ 

■ 
- 

■ 

- 

- 


VoW'  C*,,V" 


■ 


.frefl" 


Ac  «*rS5 


A_ 


WESTON 

Model  772 

Super- Sensitive 

Analyzer 

20,000  ohms  per 
volt,  SO  microampere 
Weston  meter  .  .  . 
broad  ranges  to  meet 
every  service  test  re- 
quirement. AC  accuracy  3%  at  all  frequencies 
from  60  to  7000  cycles,  and  temperatures  from 
30°  to  110°  F.  No  condenser  type  of  multipliers. 
Resistor  accuracy  better  than  1%.  Maximum  volt- 
age in  ohmmeter  IS  volts  on  30  megohm  range. 
(Iff  WESTON  Guaranteed) 

WESTON 

Model  776  (hand-calibrated)  Oscillator 


**££, 


Buy  the  instruments  which  are  bought 
and  used  by  the  manufacturers,  the 
scientific  laboratories,  the  engineer- 
ing schools  and  Government  bureaus. 
They  know  instrument  accuracy  and 
dependability  . . .  For  fifty  years  they 
have  standardized  on  WESTONS! 

Weston 

Instruments 


An  Oscillator  that  holds  its  accuracy.  Accuracy 
Y%%  on  broadcast  and  IF  bands,  1%  on  short 
wave  bands.  No  padders  or  trimmers  used— no 
dead  spots.  Low  loss  coils— controllable  output 
from  1  microvolt  to  .1  volt— constant  50%  modu- 
lation—hand-calibrated dial. 

(Iff  WESTON  Guaranteed) 


Weston  Electrical  Instrument  Corporation 

597  Frelinghuysen  Avenue,  Newark,  N.  J. 

Send  complete  information  on  Weston  Radio  Instruments. 


ADDRESS... 
CITY 


April,  1938 


25 


SERVICING 


only  half  of  the  set  is  being  used. 

To  overcome  the  possibility  of  re- 
peat service  calls,  the  serviceman 
should  explain  that  the  local  stations 
will  always  be  good,  but  that  the 
more  distant  stations  will  not  always 
provide  satisfactory  reception.  Also 
it  should  be  strongly  emphasized 
that  it  is  not  the  fault  of  the  set — 
either  the  chassis  or  the  push-button 
mechanism,  but  is  due  to  atmospheric 
conditions  and  the  distance. 

WARPING,  "SHEATHING,"  CHECKING 

*  Warping  of  cabinets  is  caused 
chiefly  by  moisture  entering  the  edges 
and  inside  surface  of  the  hardwood 
lumber.  This  can  be  prevented  by 
using  waterproof  glue  and  by  "seal- 
ing" the  edges  of  the  panels — although 
probably  50  per  cent  of  the  sets  in  use 
today  do  not  have  such  sealing  or 
filling. 

When  moisture  enters  it  may  also 
cause  "sheathing"  at  the  finish — a 
condition  in  which  the  surface  veneer 
splits  away  from  the  cabinet  proper, 
particularly  at  the  edges  of  panels  or 
slabs. 

This  is  quite  different  from  "check- 
ing" of  the  varnish  finish  caused  by 
exposure  to  hot  and  cold.  Cabinets 
left  in  a  freezing  temperature  are 
likely  to  show  this  checking  or  crack- 
ing of  the  varnish  in  small  squares 
or  hexagons,  due  to  shrinkage  of  the 
varnish  surface. 


SERVICE  TIPS 


RCA  model  M-34  No  volume  control 

action 

*  This  complaint  accompanied 
by  weak  signals  is  usually  caused 
by  an  open  i-f  coil  winding.  Go  over 
the  soldered  connections  in  the  i-f 
transformers  with  a  hot  iron  as  the 
joints  may  be  held  together  only  by 
resin  with  no  electrical  contact  be- 
ing made. 


Silvertone  model  1506  Dead 

+  Look  for  an  open  voltage  di- 
vider or  an  open  i-f  transformer  pri- 
mary. There  is  a  .01  mfd.  con- 
denser between  the  plate  and  grid 
of  the  4  7  tube.  Make  sure  that  this 
condenser  is  not  shorted.  If  there 
is  little  or  no  reception  above  1200 
Kc.  try  a  new  type  2  4  tube. 


Majestic  model  70  Intermittent 

reception 

+  The  nuts  on  the  power  pack 
terminal  strip  should  be  tightened 
with  a  pair  of  pliers.  Start  with  the 
bottom  strip  by  removing  the  top 
one  first  and  when  the  lower  ones 
are  all  tight  put  the  top  one  back 
into  place  and  thoroughly  tighten 
the  top  ones. 


Majestic  model  90  Tunable  hum 

*  In  many  cases  the  antenna 
choke  connected  from  the  antenna 
post  to  ground  will  give  trouble. 
This    is   true   when    the    antenna    has 


been  accidentally  given  a  high  volt- 
age charge  such  as  lightning,  etc. 
Replace  this  choke  to  remedy  the 
difficulty.  An  ohmmeter  test  will 
not  disclose  the  trouble  in  every 
case. 


Motorola  models  twin 
eight,  dual  six 


Dead  on  high 
frequencies 


*  First  try  replacing  the  oscil- 
lator tube.  If  a  buzzing  noise  is  au- 
dible from  the  vibrator  pack,  with 
the  volume  control  turned  off, 
tighten  the  screw  which  holds  the 
vibrator  pack  in  the  housing.  This 
is  located  at  the  bottom  of  the  set 
and  also  holds  the  cover  of  the  set 
on.  A  poor  ground  connection  of 
the  vibrator  causes  the  trouble. 


PHILCO  WIRING  DIAGRAM  BOOKS 

+  New  Philco  R.M.S.  wiring  dia- 
gram books  are  published  in  two  vol- 
umes for  more  convenience.  Volume 
one  contains  200  pages  and  contains 
wiring  diagrams  (schematics),  parts 
layout  drawings,  and  parts  list,  for 
every  Philco  built  by  the  company 
through  1936.  Volume  two  which  has 
176  pages  has  the  same  information  for 
the  1937  and  1938  receivers.  Align- 
ment data  has  also  been  included. 

The  books  are  bound  in  loose-leaf 
form  with  9  x  12  fabricoid  binders. 
The  treatment  of  the  information  is 
similar  to  that  used  in  the  Philco  ser- 
vice notes.  Priced  at  $1.25  per  vol- 
ume. Philco  Radio  &  Television  Corp., 
Tioga  and  C  Sts.,  Philadelphia,  Pa. — 
Radio  Today. 


RCA-Victor  8M  5-tube  auto  radio  set.    Note  the  use  of  fixed  bias  from  the  negative  return  of  power  supply  circuit. 


26 


Radio  Today 


PUBLISHED  SEMI-ANNUALLY  AS  A  SECTION   OF    "RADIO  TODAY" 


THOUSANDS    OF    INQUIRIES   PROVE    IT 

WEBSTER 
CHICAGO 
SOUND 
EQUIPMENT 

is  the  line  to 

Sett 


NEW    ONE-CASE    PORTABLE     SYSTEM 
14   Watt Model    PA-714 


Everything     i 


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The  new  Web- 
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catalog  is  off  the 
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Microphones 

Also   a    complete   line    of   Parts    and   Accessories 


NEW    MOBILE    SYSTEM 
30   Watt Model    MP-532 


Manufactured  under  license  arrangements 
with  Electrical  Research  Products,  Inc 
subsidiary  of  Western  Electric  Co.  Inc.  and 
American  Telephone  and  Telegraph  Co. 


Webster-Chicago  received  many  thousands  of  direct  inquiries  during  the  past  year  as  a  result 
of  advertising  and  publicity.  The  inquiries  came  from  large  and  responsible  business  firms  and 
institutions,  as  well  as  from  individuals  and  small  firms,  illustrating  the  broad  general  interest 
in  the  phenomenal  development  of  Sound. 

Webster-Chicago  has  carefully  built  its  business  during  13  years  of  experience  to  design  the 
right  kind  of  sound  merchandise  for  today's  market.  Sound  Systems  that  are  built  right,  sold 
right  at  the  right  prices  and  stay  sold.  Furthermore,  Webster-Chicago  sound  equipment  is 
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VRffl&u 


ADJUSTABLE  RtSPOME 

Kr*-      *     "c^ME  microphone) 

I^WTTH  THE  SAN^  ' 

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THE  ACOUSTIC  COMPENSATOR 

I^Sjpat.  pend.) 

Here  is  an  improvement   of  great  value  at  no  extra  cost! 
Exclusive  with  Amperite,  the  Acoustic  Compensate 
you  these  advantages: 

(1)  With  the  flip  of  a  finger,  you  can  now  lower  or  raise  the  zesi 
of  the  microphone — without  introducing  any  peaks  or  other  und 
able  effects.(Nof  a  volume  control.  Gradually  changes  operat: 
the  microphone  from  constant  velocity  to  constant  pressure.) 


(2)  Permits  adjustment  of  the  microphone  for  most  desirable  respo: 
for  close  talking  or  distant  pickup. 

(3)  Makes  the  system  immediately   adjustable  to  any  "taste,1 
condition,  or  equipment. 

MODELS  RBHK,  RBMk.  with  Acoustic  Compensator.  Frequency 
range  40  to  1 1000  CPS.  Output,  -  65  db.  Complete  with  switch,  cable 
connector  and  25'  ol  cable.  .  .  .  $42.00  LIST.  Chrome.  $43.00  List. 
MODELS  RBHn,  RBMn,  without  acoustic  compensator,  $42.00  LIST 


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ON  4  COUNTS! 


P.  A.  Men,  you  can  im- 
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by  using  the  popular  Am- 
perite Model  RAH  (or  RAD. 
You  will  get  better  results 
because  (1)  it  is  excellent 
.    for  both  speech  and  music; 
(2)  has  flat  response  with- . 
out  undesirable  peaks;  (3) 
reduces  feedback;  (4) 
stands    up    under   rough 
handling,  changes  in  tem- 
perature,  pressure  or 
humidity.  .  .  .  Frequency  range  60 
to  7500  cps.  Output,  -68  db. 
MODEL  RAH  (Hi-imp.)  with  12'  of 
cable;  MODEL  RAL  (200  ohms)  with 
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MICROPHONES 


28 


Radio  Today 


Business  is 

stabilizing, 

leaders   say, 


Products 
in  demand 
by  public 


•  To  afford  readers  an  authorita- 
tive picture  of  the  trends  and  prospects 
in  the  sound  business  during  the  com- 
ing year,  the  editors  invited  industry 
leaders  to  express  frankly  their  own 
views  on  the  current  situation  in 
sound. 

"We  look  for  1938,  despite  the  pres- 
ent recession,  to  set  a  new  mark  for 
the  sale  of  sound  equipment,  as  parts 
jobbers  are  more  and  more  appreciat- 
ing the  value  of  the  larger  unit  sale 
inherent  in  sound-equipment  merchan- 
dising," declares  John  Erwood,  vice- 
president  Webster-Chicago.  "More  rec- 
ognition and  emphasis  must  be  placed 
upon  improving  the  ultimate  perform- 
ance of  sound  equipment  for  the  con- 
sumer. This  makes  it  imperative  that 
equipment  be  chosen  on  a  system  basis 
rather  than  individual  component 
parts. 

"There  is  a  definite  trend  in  jobbing 
organizations  for  the  creation  of  sound 
departments,  specializing  in  the  sale 
of  sound  equipment,  and  their  activity 
is  being  extended  more  and  more  to- 
wards cooperative  work  with  dealers. 
This  cooperative  promotional  activity 
is  the  logical  approach  to  meeting 
mail-order  competition.  Jobbers  and 
dealers  must  take  more  advantage  of 
the  sales  promotional  material  fur- 
nished by  the  larger  manufacturers  of 
sound  equipment.  Many  sales  lost  to 
mail-order  competition  could  have  been 
saved  had  contact  been  made  at  the 
right  time." 

Legitimate  channels 

"We  are  very  optimistic  about  the 
possibilities  of  the  public  address  busi- 
ness," comments  H.  A.  Wilson,  Operad- 
io  sales  manager.  "The  present  trend 
seems  to  indicate  that  the  business  as 
a  whole  is  being  definitely  stabilized, 
and  that  this  equipment  is  more  and 
more  going  through  the  legitimate  job- 
ber-dealer channels. 

"We  have  found  that  in  general  our 
best  outlets  have  been  the  radio- 
parts  distributors.  These  distributors, 
awaking  to  the  possibilities  of  the 
sound  business,  are  in  many  cases 
organizing  special  sound  departments 
with  a  trained  sound  man  in  charge. 
The  exception  to  this  rule  is  found  in 
very  few  of  the  larger  cities  where  the 
sound  business  has  grown  to  such  pro- 
portions that  it  has  been  profitable  for 
a  sound  specialist  (and  by  this  we 
mean  a  real  sound  expert)  to  organize 
a  sound   distribution  company. 


"Reports  from  our  customers  and 
field  representatives  indicate  a  rapidly 
growing  interest  in  quality  equipment 
and  in  large  permanent  installations, 
and  we  honestly  believe  that  with  gen- 
eral conditions  improving,  the  year  of 
1938  should  be  the  best  year  that  the 
sound  equipment  industry  has  ever 
known." 

Distributor  essential 

"The  sound  business  is  peculiar  in 
that  the  unit  sale  is  large  and  the  net 
profit  comparatively  small,"  observes 
S.  Ruttenberg  of  Amperite.  "As  a  re- 
sult the  P.  A.  man  never  gets  into  a 
position  where  he  can  afford  to  carry 
a  stock  large  enough  to  take  care  of 
his  requirements.  When  he  does  need 
material  it  is  usually  in  a  hurry. 

"A  live  distributor  is  therefore  in 
an  excellent  position  to  be  of  service 
to  the  P.  A.  man.  The  distributor  can 
usually  obtain  credit  whereas  most 
P.  A.  men  have  no  credit  rating.  A 
P.  A.  man  who  knows  his  business 
should    not    have    any    trouble    what- 


SEE   BIG 
1938 


ever  competing  with  mail-order  houses 
because  he  has  the  distinct  advantage 
of  direct  contact  and  the  chance  to 
demonstrate." 

Profitable    if    handled    properly 

"The  average  P.  A.  man,  after  hav- 
ing weathered  a  very  severe  set-back 
in  business  during  the  winter  months, 
is  extremely  optimistic  over  the  pros- 
pects for  this  Spring  and  Summer," 
says  Hubert  L.  Shortt,  president  Trans- 
former Corp.  of  America.  "Even  at 
this  writing,  we  find  a  definite  change 
in  sentiment.  Men,  who  in  some  mea- 
sure depend  on  the  sale  of  sound  equip- 
ment for  a  living,  have  already  planned 
their  Spring  campaigns.  And  that,  in 
my  opinion,  is  the  secret  of  success 
in  the  P.  A.  business.  It's  simply  the 
old  story  of  the  early  bird  getting  the 
worm. 


"Too  many  would-be  sound  special- 
ists like  to  see  the  business  roll  in, 
without  the  necessity  of  sales-promo- 
tion expenditures  and  good  old  hard 
work.  Successful  organizations  know 
only  too  well  that  this  condition  never 
exists.  To  make  any  business  profit- 
able today  you  must  be  alert,  active 
and    ready    to    gain    every    advantage. 

"Despite  the  recession,  P.  A.  has 
and  will  continue  to  progress.  Our  or- 
ganization looks  forward  to  a  very 
sucessful  year  in  P.  A.  because:  Sound 
re-enforcement  is  now  a  necessity:  it 
is  gaining  in  popularity;  the  poten- 
tialities are  unlimited;  equipment  per- 
formance is  very  good,  and  prices  are 
the  lowest  ever." 

Create  consumer  interest 

"Sound  re-enforcement  has  no  visible 
limits  today.  Indeed,  sound  has  be- 
come as  much  of  a  necessity  in  mod- 
ern business  as  it  is  in  the  entertain- 
ment world.  Few  industries  offer  as 
many  opportunities  to  their  sales 
agencies  as  does  sound.  The  market 
is  rich,  fertile,  and  ready  for  the  culti- 
vation. Each  new  day  uncovers  some 
new  use,  some  heretofore  unthought-of 
field,  ripe  for  sound  installations." 
These  are  the  views  of  A.  W.  Pletman, 
president.  Wholesale  Radio  Service 
Company. 

"In  such  a  market  growing  with 
gusher-town  speed,  that  man  is  fool- 
ish who,  having  sound  equipment  to 
sell,  stops  to  worry  too  much  about 
competition.  He  is  like  the  runner  who 
leads  the  pack  until,  foolishly  turning 
to  see  where  the  rest  are,  he  stumbles 
and  loses  the  race. 

"Competition,  of  course,  cannot  be 
overlooked.  Fundamentally,  every 
merchandiser  of  sound  equipment 
must  have  quality  units  at  competi- 
tive prices.  However,  price  and  quality 
alone  will  not  create  a  demand  for 
sound  re-enforcement.  First,  there 
must  be  a  need  for  this  equipment. 
Today,  this  fundamental  is  an  estab- 
lished fact.  Second,  the  prospective 
user  must  know  about  your  organiza- 
tion and  your  services.  Also,  he  must 
be  shown  why  sound  equipment  is  a 
necessity  in  his  business. 

"The  sound  business  made  some  of 
its  most  important  gains  during  the 
'depression'  years.  The  market  was  at 
thai,  time,  ana  still  is,  increasing  at 
a  fast  pace.  The  trend  of  the  sound 
business  curve  is  still  upward.  That 
is  why  we  say,  'look  for  a  big  year  in 
1938.'" 


April,  1938 


29 


BETTER   SOUND   JOBS! 

Importance  of  acoustics  in  setting  quality  sound 
reproduction  —  Problems    of    sound    pick-up. 


*  For  some  years  the  public  has 
listened  to  the  average  sound-reinforc- 
lag  system  of  which  the  quality  of  re- 
production has  been  greatly  inferior 
to  that  of  the  average  radio  set  in 
the  home.  The  reasons  for  this  were 
poor  sound  equipment  and  failure  on 
the  part  of  the  sound-man  to  apply 
the  fundamentals  of  acoustics  to  his 
installations  to  insure  a  successful  job. 
Today  we  have  better  equipment 
which,  if  installed  and  used  intelli- 
gently, will  result  in  better  sound  in- 
stallations. 

It  should  be  realized  at  the  outset 
that  there  is  something  more  to  a  good 
sound  job  than  merely  delivering  the 
equipment,  connecting  it  and  "showing 
the  customer  how  to  use  it.  Each  in- 
stallation is  individual  because  of  the 
acoustic  conditions  present  at  the  mi- 
crophone and  in  the  space  where  the 
loudspeakers  are  located.  These  con- 
ditions are  different  for  each  job  and 
must  be  recognized. 

It  is  well  to  ke«p  in  mind  always 
that  the  objectives  of  a  successful 
sound  system  are:  (1)  to  reproduce 
sound,  such  as  speech,  music,  records 
or  radio,  faithfully;  and  (2)  to  dis- 
tribute this  faithful  reproduction  suf- 
ficiently well  and  loud  enough  for  the 
entire  audience  to  hear  comfortably. 

Acoustic  considerations 

To  attain  these  objectives  a  funda- 
mental knowledge  of  acoustics  is 
therefore  essential  on  the  part  of  the 
sound  technician.   An  understanding  of 


the  acoustics  of  the  space  in  which 
the  sound  originates  and  in  which  it 
is  reproduced  is  very  necessary.  A 
knowledge  of  the  characteristics  of  the 
loudspeaking  system  itself  is  also  es- 
sential. 

Concerning  the  acoustics  in  which 
sound  is  picked  up  or  in  which  it  is  re- 
produced, four  factors  are  of  concern: 
Reverberation,  echo,  resonance  and 
diffraction. 

Reverberation  and  echoes 

Reverberation  is  caused  by  reflection 
and  is  characterized  by  the  persistence 
of  sound  after  the  source  of  sound  has 
ceased  to  emit.  When  the  time  of  re- 
verberation in  the  space  where  the 
microphone  is  located  is  great  enough 
to  cause  one  sound  to  hang  over  and 
become  mingled  with  succeeding 
sounds  it  is  practically  impossible  to 
improve  conditions  by  the  use  of  a 
public  address  system.  In  such  a  case 
it  will  be  necessary  to  place  sound  ab- 
sorbing material  in  the  space.  The  ef- 
fect of  absorbing  material  on  reduc- 
ing the  time  of  reverberation  depends 
upon  the  amount  used  and  its  disposi- 
tion. 

Echo  usually  occurs  in  large  build- 
ings or  in  large  open  spaces  sur- 
rounded by  buildings,  trees  or  other 
obstacles  which  interfere  with  the  re- 
produced sound  rather  than  with  the 
source  of  sound.  There  are  cases,  par- 
ticularly in  auditoria  having  large 
curved  wall-space  or  ceilings,  from 
which  localized  echoes  occur.  The 
speaker's   voice   or   extraneous   sounds 


With  summer  and   fine   weather   coming,   outdoor   gatherings   of   all   kinds   offer 
opportunities   for   sound   jobs.     For   concerts,   good   quality   is   essential. 


from  the  audience  may  be  reflected 
from  one  or  more  of  these  surfaces  to 
focal  spots  where  the  volume  of  sound 
is  consequently  great.  Therefore,  it  is 
important  that  the  microphone  is  not 
placed  at  one  of  these  spots. 

The  points  of  localized  echo  are  also 
particularly  troublesome  when  they  oc- 
cur in  the  space  occupied  by  the  audi- 
ence. Under  these  conditions  not  only 
is  the  sound  intensity  too  great,  but 
the  character  of  the  sound  is  altered 
and  very  often  badly  confused.  The 
avoidance  of  such  difficulties  is  a  mat- 
ter of  test  and  Involves  a  rearrange- 
ment of  the  loudspeakers.  They  should 
not  be  aimed  at  hard  flat  or  curved 
reflecting  surfaces. 

Resonance  or  peaked  output  becomes 
important  in  connection  with  the  plac- 
ing of  the  microphone.  Detrimental 
effects  generally  result  from  attempts 
to  conceal  the  microphone  by  placing 
it  in  some  form  of  small  enclosure. 
The  subject  of  auditorium  resonance 
was  discussed  in  the  September,  1937, 
issue  of  Selling  Sound,  page  31,  and 
a  practical  method  of  dealing  with  it 
was  described. 

Sound  diffraction 

The  troubles  introduced  by  diffrac- 
tion are  only  rarely  encountered.  They 
occur  when  sound  is  reflected  from 
regularly  spaced  reflectors  or  passed 
through  regularly  spaced  openings. 
Loudspeakers  operating  in  a  large 
field  surrounded  by  an  open-work 
board  fence  are  a  source  of  this 
trouble  as  well  as  regularly-spaced 
flat-sided  columns  in  auditoria.  This 
trouble  is  found  in  distinct  areas,  par- 
ticularly at  the  outskirts  of  the  audi- 
ence where  the  sound  is  badly  dis- 
torted. 

Considering  the  characteristics  of 
the  system  itself,  it  should  be  such  that 
reproduction  is  faithful,  which  is  re- 
quirement number  one.  The  second 
requirement — that  it  deliver  its  repro- 
duction loud  enough  for  the  entire 
audience  to  hear  comfortably  and 
enough  above  noise  for  good  intelligi- 
bility— bears  on  the  psychology  of 
hearing.  There  must  be  co-ordination 
between  hearing  and  seeing,  or  illu- 
sion. The  illusion  should  be  such  that 
the  majority  of  the  audience  is  con- 
scious of  only  one  source  of  sound,  and 
that  that  sound  emanates  from  the 
speaker  himself.  This  effect  is  ac- 
complished by  mounting  the  loud- 
speakers in  a  group  over  the  speaker's 
location. 


30 


Radio  Today 


Too  much  amplification! 

When  the  voice  of  a  speaker  is 
amplified  too  much,  apparent  distortion 
results.  If  the  speaker  is  talking  in 
a  conversational  tone  his  voice  con- 
tains a  larger  percentage  of  low  fre- 
quencies than  when  he  raises  his  voice 
to  a  high  level.  If  the  output  level  of 
the  system  is  so  high  that  instinct 
tells  the  audience  that  the  speaker 
should  be  shouting,  the  system  appears 
to  make  his  voice  sound  quite  heavy 
and  somewhat  unnatural.  This  is  a 
common  fault  in  system-operation  and 
has  done  much  to  retard  the  accept- 
ance of  sound  reinforcement  by  the 
general  public.  This  is  trivial  to  one 
who  places  loudness  before  quality 
and  illusion.  The  sound-man's  job  is 
to  have  his  customers  use  their  sys- 
tems properly  thereby  maintaining  a 
high  standard  of  reproduction.  Pleas- 
ing results  are  what  lead  to  more  in- 
stallations! 

Microphones 

One  of  the  important  factors  which 
will  improve  many  a  sound-job  is  the 
use  of  the  proper  microphone.  The 
suitability  and  the  limitations  of  the 
several  types  should  be  understood  and 
kept  in  mind.  These  instruments  have 
been  developed  and  improved  to  the 
point  where  the  sound-man  need  only 
select  the  proper  type  for  the  pick-up 
and  install  it  properly  to  do  a  good 
job.  The  choice  depends  upon  the 
acoustic  conditions  at  the  sound-col- 
lecting point  in  the  space  where  the 
sound  is  being  reproduced,  and  upon 
the  nature  of  the  pick-up.  The  essen- 
tial characteristics  of  the  various 
types  follow. 

A  universal  microphone  with  one 
set  of  fixed  characteristics  does  not 
adequately  satisfy  the  many  problems 
of  sound  collection.  For  example,  di- 
rectional and  non-directional  micro- 
phones have  definite  applications,  while 
non-uniform  response  over  a  limited 
range  may  be  best  suited  for  pick-up 
under  certain  conditions.  Weight  and 
size  may  be  important  considerations 
in  some  cases,  while  in  others  high 
output  may  be  more  desirable  than 
other  characteristics. 

Wide-angle  pick-up 

Generally  speaking,  natural  repro- 
duction requires  a  microphone  that 
has  no  peaks  of  its  own.  For  wide- 
angle  distortionless  pick-up,  the  mov- 
ing coil  or  dynamic  microphone  of 
spherical  shape,  having  a  flat  circular 
acoustic  screen  in  front  of  the  dia 
phragm  gives  a  smooth  response  and 
has  a  high  ratio  of  output  level  to 
weight  of  the  instrument.  The  impe- 
dance is  low,  which  means  that  a  long 
lead  can  be  used.  Several  types  of 
rochelle  salt  crystal  microphones  are 
available.  The  spherical  non-direc- 
tional type  has  a  high  impedance  and 
should  be  arranged  to  operate  directly 
into  a  vacuum  tube. 

For  semi-directional  pick-up,  which 
must  be  resorted  to  when  acoustic  in- 
terference    prevails,     such     as     street 


noise,  electric  fans,  etc.,  a  velocity  or 
the  spherical-shaped  dynamic  micro- 
phone can  be  used.  In  the  latter  case 
the  acoustic  screen  is  removed  and  an 
annular  disc  or  baffie  is  fastened  over 
the  front  of  the  mike.  Semi-directional 
microphones,  both  of  the  direct  and 
diaphragm-actuated  crystal  types  are 
also  available. 

Directive  pick-up 

For  directive  pick-up,  which  has 
been  found  to  be  desirable  in  instances 
where  it  is  necessary  to  improve  the 
ratio  of  direct  to  reflected  sounds,  or 
to  discriminate  against  undesired 
sounds,  the  uni-directional  and  bi-di- 
rectional microphones  have  been  found 
useful.  This  transmitter  has  particu- 
lar application  in  cases  where  the 
sound  to  be  collected  originates  in 
front  of  the  instrument  and  undesired 
sounds  in  the  rear.  It  is  also  useful  in 
controlling  acoustic  feedback. 

Bi-directional  pick-up  is  accomp- 
lished through  the  use  of  the  ribbon 
microphone  which  collects  sound  from 
the  front  and  back  and  none  from  the 
sides.  This  type  is  also  very  useful 
in  reducing  feedback.  Ribbon  micro- 
phones, however,  may  give  trouble 
when  used  out-of-doors  in  a  strong 
wind  unless  shielded  by  a  windbreak. 
These  instruments  have  low-  impe- 
dance. 


For  announcing,  a  microphone  de- 
signed for  such  work  should  be  used. 
These  mikes  discriminate  against  the 
lower  voice  frequencies  and  provide 
maximum  response  at  the  higher  fre- 
quencies, and  thus  improve  intelligi- 
bility. 

The  lapel  microphone  is  designed  for 
the  lecturer,  demonstrator,  the  spe- 
cialty act.  etc..  where  freedom  of 
movement  by  the  wearer  is  important. 
These  are  small  and  very  light  and 
discriminate  against  the  low  voice  fre- 
quencies. 

For  footlight  installations  for  stages, 
the  microphones  should  be  approxi- 
mately 12  feet  apart. 

Avoid  reflecting  surfaces 

In  placing  any  mike  it  is  important 
that  no  highly  reflecting  surfaces  be 
located  between  the  speaker  and  the 
microphone  in  such  a  manner  that 
sound  from  the  reflecting  surface  is 
thrown  back  directly  at  the  micro- 
phone. Distortion  from  this  cause  is 
characterized  by  a  hollow  quality.  The 
use  of  a  sound-absorbing  material  on 
the  floor  or  the  reflecting  surface  will 
eliminate  this  difficulty.  In  general, 
reverberation  from  walls  or  from  the 
acoustic  properties  of  sets  and  stages, 
becomes  more  serious  proportionately 
as  the  microphone  is  removed  away 
from  the  source  of  sound. 


April,  1938 


Top  chart  illustrates  excessive  reverberation.  Note  how  sound  beams  hit  wall  and 
bounce  off  without  losing  any  volume  because  the  walls  do  not  absorb  any  of  the 
sound.  Bottom  chart  shows  how  sound  absorbing  material  reduces  the  reflected 
sound   wave   and  at   same   time   reduces   possibility   of   feedback    to   microphone. 

31 


AMPLIFIERS  AND  SPEAKER  SYSTEMS 

Sound  amplification  and  distribution  problems 


*  Important  factors  in  selecting  an 
amplifier  for  a  sound  system. are:  (1) 
ability  to  show  the  required  gain  over 
the  desired  frequency  range,  and  (2) 
ability  to  deliver  the  required  amount 
of  power  without  overloading.  It 
should  be  free  from  hum.  Complete 
amplifier  specifications  are  listed  on 
pages  42-44  and  an  explanation  of  them 
appears  on  page  38. 

The  response  -  frequency  character- 
istic of  the  amplifier  will  indicate  its 
gain  over  the  frequency  spectrum. 
These  curves  are  available  to  the 
sound-man  from  the  manufacturer. 
Some  speech  amplifiers  are  usually  de- 
signed to  work  from  a  definite  im- 
pedance and  any  great  change  from 
that  value  is  apt  to  cause  frequency 
discrimination  at  the  input  trans- 
former and  thus  change  the  frequency- 
response  characteristic. 

Universal   input  impedances 

A  desirable  feature  which  will  elim- 
inate the  possibility  of  this  trouble  is 
the  universal  impedance  input  circuit. 
Amplifiers  are  now  available  with  uni- 
versal input  transformers  which  per- 
mit any  type  of  microphone  or  tran- 
scription equipment  to  be  used  inter- 
changeably so  that  the  best  condition 
of  impedance  match  is  maintained 
without  the  use  of  external  trans- 
formers or  matching  pads.  With  the 
wide  variety  of  microphones  and  rec- 
ord pick-ups  now  used,  and  the  prob- 
ability that  the  variety  will  increase, 
input  circuits  should  have  great  flexi- 
bility to  be  completely  adaptable. 


Concerning  amplifier  power,  which 
is  also  cited  in  the  article  previously 
mentioned  in  Selling  Sound,  it  is  usu- 
ally well  to  have  a  reserve  power  of 
ten  to  fifteen  percent  more  than  is 
actually  required.  Sometimes  addi- 
tional loudspeakers  will  be  purchased 
for  the  installation  and  this  reserve 
will  be  sufficient  to  operate  them. 

Extreme  fluctuations  of  power  sup- 
ply voltage  are  often  encountered  in 
remote  localities  such  as  rural  com- 
munities and  resorts.  Here  some 
simple  and  inexpensive  means  of  com- 
pensation will  be  required.  The  pri- 
mary winding  of  the  power  trans- 
former of  the  amplifier  should  be 
tapped  to  provide  this  compensation. 
If  a  more  elaborate  control  is  needed 
an  autotransformer  panel,  equipped 
with  a  voltmeter  and  having  a  switch 
for  varying  the  voltage  supply  to  the 
amplifier   should  be   used. 

Stabilized  feedback  amplifiers  are 
now  available  which  have  other  very 
desirable  points  and  are  not  expensive. 
The  use  of  this  new  equipment  should 
indicate  the  sound  man's  ability  to 
keep  abreast  of  the  new  and  latest 
types  of  equipment. 

Amplifier  frequency  response 

In  the  past  the  overall  frequency 
characteristic  of  a  sound  system  could 
only  be  altered,  to  correct  acoustic 
defects  in  the  space  where  the  sound 
is  reproduced,  by  adding  external 
equalizers  or  by  changing  the  char- 
acteristic of  the  amplifier.  This  latter 
operation  is  the  work  of  an  engineer. 


Distortion  in  sound  amplifiers  should  be  held  to  a  level.     Curve  above  is  for  a 
25-watt  amplifier.     At  outputs  much  greater  than  the  rated,  distortion  becomes 

extremely  high. 


Amplifiers  are  now  available  with 
an  adjustable  response  characteristic 
which  permits  either  the  low  or  high 
ends  of  the  characteristic  to  be  attenu- 
ated with  the  result  that  the  overall 
response  can  be  adjusted  to  compensate 
for  auditorium  resonance  or  other 
acoustic  defects.  Through  the  use  of 
equalizers  it  is  possible  to  improve 
many  existing  sound  installations.  Dia- 
logue equalizers  will  add  crispness  and 
intelligibility  to  speech  by  elimination 
of  the  unnecessary  low  frequencies.  A 
high-pass  filter  will  provide  compen- 
sation for  exaggerated  low-frequency 
response  or  rumblings  inherent  in 
some  microphones.  The  elimination  of 
the  low  frequencies  in  high-power  in- 
stallations, in  those  cases  where  they 
are  not  needed,  increases  the  available 
power  output  from  the  loudspeakers. 
Low-pass  filters  may  be  used  to  sup- 
press noise  due  to  needle-scratch  from 
transcription  equipment. 

Loudspeakers  can  be  divided  into 
two  general  classes:  (1)  the  directive 
type,  such  as  horns,  and  (2)  the  non- 
directive  or  cone  types  which  are  usu- 
ally mounted  in  cabinets  or  on  baffles. 
The  properties  of  each  type  should  be 
understood   and   used   to   advantage. 

Directive   speakers 

We  all  know  that  a  horn  is  a  sound 
projector.  It  is  therefore  useful  for 
transmitting  sound  over  comparatively 
great  distances.  With  it  sound  can  be 
directed  to  specific  areas  at  sufficient 
volume  to  over-ride  interfering  noises. 
Furthermore,  loudspeakers  having  di- 
rective properties  have  advantages 
which  can  be  used  to  secure  good  over- 
all results  from  a  sound  system  when 
the  time  of  reverberation  seems  exces- 
sive for  ordinary  speech  and  music. 
If,  in  using  a  horn,  the  first  surface  the 
sound  strikes  is  highly  absorbent,  such 
as  the  audience  area,  the  effect  will 
be  to  reduce  the  reverberation  time 
because  the  direct  sound  is  higher  in 
level  than  the  reflected  sound.  It  is 
therefore  possible  by  careful  use  of  the 
directional  properties  of  horns  to  so 
distribute  sound  as  to  raise  the  in- 
tensity-level in  the  audience  area  and 
thus  avoid  some  of  the  more  severe 
interferences  or  reflections  that  would 
occur  if  non-directive  loudspeakers 
were  used. 

Avoid  reflections 

At  the  same  time  the  directive 
speaker  may  seriously  exaggerate  an 
acoustic  fault  if  it  is  not  properly  con- 
trolled. It  should  not  be  aimed  at  ceil- 
ings or  walls  from  which  there  is  a 
possibility  of  high-intensity  reflections. 
In  general  horns  should  be  mounted 
as  high  in  the  air  as  consistent  with 
the   architecture   to   direct   the   sound 


32 


Radio  Today 


This  storm-proof  marine  type  cone  speaker  made  by  Atlas  Sound  is  well  suited 
for  all  outdoor  applications.    Unit  worked  okay  after  rigid  test  shown  above. 


downward  to  the  audience  area,  thus 
reducing  the  intensity  of  sound  re- 
flected from  the  ceiling. 

The  low-frequency  response  of  a  horn 
is  dependent  on  the  length  of  the  air- 
column.  To  obtain  low  frequency  re- 
sponse the  horn  becomes  exceedingly 
long  and   heavy. 

Cone  speakers 

The  objections  to  weight  and  size 
of  horns  are  overcome  by  the  cone 
loudspeaker.  Assuming  a  good  cone 
unit  is  employed,  it  must  be  properly 
mounted  to  give  good  results.  Cab- 
inets and  baffles  should  be  large.  Even 
these  speakers  are  directional  with 
respect  to  the  high  frequencies.  They 
should  be  so  mounted  that  the  listener 
will  be  in  the  high  frequency  beam, 
so,  obviously,  the  speaker  should  be 
mounted  level  with  the  head  of  a 
seated  listener.  The  use  of  vanes  to 
distribute  the  high  frequencies  is  help- 
ful. Most  vanes  are  designed  to  spread 
the  beam  in  the  horizontal  plane  only. 

In  order  to  reproduce  the  low  fre- 
quencies, the  cone  should  be  large  and 
the  speaker  should  be  mounted  on  a 
large  baffle,  or  in  a  large  cabinet  or 
closet.  Care  should  be  taken  so  that 
the  baffle  or  any  parts  cannot  rattle. 
If  the  cost  of  the  large  18"  speaker 
is  prohibitive,  the  use  of  two  smaller 
speakers  will  improve  the  low-fre- 
quency response.  These  may  be 
mounted  side  by  side  in  the  same  baf- 
fle or  cabinet,  and  they  must  be  cor- 
rectly  phased. 

Phasing   speakers 

When  two  speakers  are  correctly 
phased  both  cones  will  move  in  the 
same  direction  when  the  voice  coils 
are  excited.  A  simple  way  to  observe 
this  motion  is  to  connect  an  ordinary 
ly2  volt  dry  cell  across  the  two  voice- 
coils  connected  either  in  series  or  in 
parallel.  Observing  that  the  direction 
of  movement  of  both  cones  is  the  same 
as  the  battery  is  connected  and  dis- 
connected will  indicate  that  the  speak- 
ers are  correctly  phased. 

For  the  deluxe  installation,  the 
acoustic-labyrinth  type  of  speaker  is 
very  desirable.  The  use  of  this  type 
overcomes  certain  objections  to  mount- 
ing speakers   in   cabinets   with   result- 


ing poor  low-frequency  response.  Also, 
the  use  of  a  horn  coupled  to  the  hack 
side  of  a  cone  loudspeaker,  gives  high 
efficiency  and  smooth  response  at  the 
low  frequencies.  Acoustic  networks  and 
"infinite  baffle"  housings  are  now  used 
to  improve  the  low-frequency  response 
of  dynamic  speakers.  This  is  a  com- 
paratively inexpensive  method  of  im- 
proving response. 

Permanent  magnet  dynamic  loud- 
speakers are  especially  suitable  for 
centralized  radio  and  for  school  sys- 
tems as  well  as  other  applications 
where  electrical  field  excitation  is  not 
readily  available  or  expedient. 

Educating  customer 

After  the  job  is  done  and  the  instal- 
lation has  been  turned  over  to  the 
customer,  the  sound-man  can  still  do 
things  to  improve  conditions,  and,  in- 
cidentally help  his  reputation  as  a 
good  sound-man.  He  should  make  sure 
the  customer  understands  how  to  op- 
erate the  system  properly.  He  can  per- 
suade him  not  to  use  too  much  vol- 
ume.   The   customer   may    need    to    be 


educated:  If  the  sound-man  cannot 
get  a  contract  for  service  and  main- 
tenance, he  can  make  sure  the  cus- 
tomer is  given  the  information  he 
needs.  It  will  help  both  in  the  end. 

The  sound-man  should  go  back  to 
the  job  once  in  a  while  to  see  if  the 
customer  is  still  satisfied  and  to  make 
a  check  of  the  system  operation.  The 
customer  may  want  to  try  some  new 
tricks  involving  additional  equipment, 
and  technical  advice  at  this  point  may 
put  over  the  sale. 

Let's  have  better  sound  installa- 
tions! 


DECIBEL  CHART 


*  On  page  35  of  this  issue  appears 
a  chart  designed  for  converting  decibel 
levels  to  powers  or  to  voltages  for  spe- 
cific load  resistances.  Also  the  voltages 
and  powers  can  be  converted  to  deci- 
bels. Zero  decibel  is  set  at  .006  watts, 
which  is  the  most  common  standard 
used  in  sound. 

Three  sets  of  scales  are  employed  to 
extend  the  range  of  the  chart.  When 
using  the  chart,  the  same  scale  must 
be  used  for  any  one  calculation. 

Commonly  used  load  resistances  are 
shown  on  the  chart — these  are  used 
when  converting  decibel  levels  to  volts 
and  vice-versa.  An  example  indicated 
by  dotted  lines  is  shown  on  the  right 
side  of  the  chart  and  labeled  (a).  Al- 
ways be  sure  to  employ  the  proper  load 
resistance. 

Conversion  of  decibels  to  watts  is 
accomplished  by  using  the  DB  vs. 
POWER  line.  An  example  shown  in 
dotted  lines  on  the  left  is  labeled   (b). 

The  data  for  this  chart  was  supplied 
by  G.  M.  Giannini,  of  Transducer  Corp., 
who  is  offering  additional  copies  of 
this  chart,  suitable  for  framing,  with- 
out charge.  Requests  should  be  ad- 
dressed to  the  company  at  30  Rocke- 
feller Plaza,   New  York,   N.   Y. 


40T+360B  output 


VOLTAGE 
AMP 

•    : 

MIXER  LOSS 
10  DB 

OVER-ALL   AMPLIFIER 
>        GAIN  OF  AT  LEAST 
121  DECIBELS    REQUIRED 


—  85DB     


April,  1938 


Power  output  of  a  system  is  determined  by  acoustical  conditions  while  the  input 
level  is  determined  by  the  type  of  mike  used.     From  these  two  requirements  the 
amplifier  gain  is  calculated  in  terms  of  decibels. 

33 


HOW  TO  SELL  "SOUND" 

An  experienced  sound  specialist  tells  ways  to 
locate  and  close  sound  sales.  Rentals  important 


*  Sound  today  is  perhaps  one  of 
the  most  complicated  phases  of  the 
radio  business,  as  those  in  it  are 
finding  out.  In  the  first  place,  little 
or  ne  consumer  advertising  has  been 
done,  and  in  the  second  place  the 
consumer  understands  in  many  cases 
nothing  regarding  the  equipment, 
outside  of  it  being  called  a  "loud 
speaker  system."  Perhaps  this  lack 
of  knowledge  on  the  public's  part  is 
the  greatest  obstacle  in  making  sales, 
as  the  consumer  is  always  "afraid  of 
being  taken"  when  buying  equipment. 

Reports  of  sales  now  being  made 
show  that  "sound"  is  no  baby  any 
longer  but  is  an  established  radio 
industry  in  its  own.  Present-day 
equipment  has  been  perfected  tre- 
mendously over  that  offered  two  years 
ago,  and  is  more  compact,  reliable 
and  streamlined  to  fit  in  with  any 
surroundings,  whether  a  church,  or  a 
tavern. 

The  radio  dealer  who  does  not  have 
a  man  devoted  to  sound  equipment, 
at  least  part  of  the  time,  is  placed 
at  a  decided  disadvantage  from  the 
start.  By  association  with  the  in- 
stallations and  equipments,  such  a 
specialist  soon  learns  the  limitat- 
tions  and  peculiarities,  knows  the 
prospect    field,    and    can    talk    intelli- 


gently regarding  phases  of  equipment 
when  required.  It  is  practically  im- 
possible for  each  salesman  to  know 
all  the  whys  and  wherefores  concern- 
ing sound,  since  so  many  new  dif- 
ferent advances  are  realized  each 
week,  hence  it  is  best  to  let  one  per- 
son concentrate  exclusively  on  sound 
equipment. 

Sales  thru  rentals 

The  rental  field  which  the  dealer 
enters  at  the  start,  is  quickly  over- 
looked in  favor  of  sales  when  the  go- 
ing gets  tough.  Yet  it  is  through  the 
rental  approach  that  ultimate  sales  of 
sound  equipment  are  made  in  75 
per  cent  of  the  cases.  The  prospect 
rents  the  equipment,  soon  learns  the 
convenience  and  labor-saving  possi- 
bilities, and  then  wants  to  purchase 
it.  Yet  many  dealers  exist  on  the 
hit  and  miss  of  giving  a  demonstra- 
tion, telling  the  price,  and  using 
some  persuasion.  Then  in  the  event 
the  sale  does  not  materialize,  they 
drop  the  prospect  cold. 

Even  if  the  prospect  buys  equip- 
ment elsewhere,  the  serviceman  can 
get  business  again.  The  equipment 
will  need  servicing  at  some  time,  new 
tubes,   and  in   case  of  a  pickup,  new 


SPECIAL  CAR  MAKES  7000-MILE  TRIP  TO  DEMONSTRATE  SOUND 


Sound    equipment    gets    a    private    car    and    hundreds    of    architects,    engineers, 
builders,   educators,    entertainment   operators,   industrialists,    etc.,   hear   the   story 
of  PA's  efficient  usefulness.    RCA's  $35,000  sound  exhibit,  in  this  special  Pullman,, 
travels    7,000   miles   and   stops     in    24    key    cities    for    demonstrations     of     1938 

amplification. 


records.  Take  for  example,  this  case 
that  actually  happened: 

One  soundman  gave  a  bid  of  $175 
for  equipment  specified  on  the  bid 
Another  bid  $150  and  got  the  busi- 
ness. This  particular  church  at  the 
time  requested  an  amplifier  with  two 
speakers  and  a  microphone.  This 
being  a  15-watt  amplifier  was  ample 
for  their  hall.  But  spring  came  and 
the  equipment  was  of  no  use  on  the 
outside  due  to  incorrect  baffles,  and 
output. 

Friend  dealer  who  was  left  cold  on 
the  sale  had  kept  sending  this  church 
postcards  advertising  sound  rentals, 
sales  and  service,  and  was  able  to 
turn  in  a  few  profitable  rentals  on 
this  basis.  His  cost  was  nominal,  not 
more  than  six  or  seven  cents  postage 
for  coverage  of  this  church,  and  other 
amusement  places  through  systematic 
monthly  mailings. 


Churches,  schools,  "b/ngo" 

Many  churches  and  schools  today 
are  buying  equipment  not  in  the 
least  suited  for  their  future  require- 
ments. True,  additional  microphones 
may  be  added,  as  well  as  speakers, 
but  the  output  peak  is  always  there, 
and  in  nine  cases  out  of  ten,  the 
church  or  school  will  not  buy  addi- 
tional accessories,  leaving  an  open- 
ing for  the  rental  soundman,  for  cer- 
tain requirements  which  can  not  be 
covered   by   the   initial   equipment. 

At  the  present  time  "bingo"  games 
are  popular  and  to  a  certain  extent 
replacing  lotto.  One  of  the  main 
reasons  being  that  bingo  is  played 
faster  and  consequently  produces 
more  revenue  for  the  sponsor  of  the 
affair.  Almost  any  hall,  no  matter 
how  small,  the  smaller  ones,  inci- 
dentally the  easier,  can  be  sold  by 
pointing  out  that  any  overflow  can  be 
accommodated  by  the  use  of  an  addi- 
tional speaker  with  microphones  con- 
nected to  the  system  for  calling  back 
games.  This  is  more  efficient  than 
any  buzzer  or  telephone  system  and 
also  easier  for  the  soundman  to  in- 
stall. 

Spring  has  come,  summer  is  ap- 
proaching, so  don't  forget  all  of  the 
festivities  among  the  churches  and 
schools,    and    the    factory    employees' 

(To   page  48) 


34 


Radio  Today 


DECIBELS  EXPRESSED  IN  VOLTS  &  WATTS 

For  matching  microphones,  amplifiers,  and  speakers 


— 



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kk 


CONTACT  MIKE"  OPENS  NEW  FIELDS 

Picks  up  vibrations  direct  from  instrument.  New  commercial  opportunities 


*  XEW  possibilities  in  musical 
reproduction  and  "sound  selling"  are 
opened  up  by  the  "contact  micro- 
phone," which  reproduces  the  vibra- 
tions of  any  instrument  or  object  on 
which  it  is  placed.  This  reproduc- 
tion is  accomplished,  moreover,  with- 
out introducing  any  annoying  peaks, 
and  life-like  results  are  given 
throughout  the  entire  frequency 
range,  explains  Sam  Ruttenberg  of 
Amperite. 

An  idea  of  the  reproduction  qual- 
ity of  the  new  contact  mike  can  he 
gained  from  the  fact  that  it  was 
used  recently  by  the  Philadelphia 
Symphony  Orchestra  to  reinforce  a 
mandolin  solo.  The  unit  is  flat  with- 
in ±  '2  db  from  40  to  9,000  cycles  per 
second.  Its  operating  principle  is 
magnetic. 

Although  the  violin  is  one  of  the 
most  versatile  instruments,  its  use 
has  been  reduced  to  practically  large 
symphony  orchestras  where  enough 
violins  to  give  the  necessary  dynamic 
power  can  be  afforded.  Violinists 
therefore  learned  to  play  the  more 
demanded  saxophones.  The  reason 
for  the  unpopularity  of  the  violin  in 
dance  orchestras  is  due  to  its  limited 
power  output.  Sound  engineers  re- 
moved this  objection  by  giving  the 
violinist  amplification — and  yet  he 
must  he  pushed  to  try  it — to  ex- 
periment with  it.  Patience  and  tact 
must  therefore  be  exercised  by  the 
sound  man  in  dealing  with  musicians. 
Stokowski  compares  this  lack  of  in- 
terest  in  sound   amplification   on   the 


part  of  musicians,  as  follows:  "If  a 
gold  mine  were  found  or  a  subterra- 
nean sea  of  petroleum  discovered,  it 
would  be  quickly  developed.  But  a 
means  whereby  every  man  can  hear 
music  with  overwhelming  beauty  and 
elegance  is  neglected  and  left  un- 
used." 


N 


h 


)lin< 


ew  magic  tor  violins 

With  the  aid  of  the  new  contact 
microphone  a  $50  violin  can  be  given 
the  tone  and  volume  of  one  costing 
several  thousand  dollars.  It  also 
gives  the  violin  the  dynamic  power 
of  the  brasses.  A  few  violins  can 
give  a  small  orchestra  the  effect  of  a 
symphony.  A  "hot"  violinist  can 
obtain  effects  unobtainable  by  any 
other  instrument.  Instead  of  de- 
creasing, the  use  of  amplification  will 
increase  the  employment  of  violinists 
— their  more  powerful  instruments 
will  increase  their  usefulness  and 
field. 

Classical  guitar  players  find  it  dif- 
ficult to  obtain  volume.  Their  pow- 
er of  interpretation  is  limited.  The 
contact  mike  gives  the  guitar  the 
volume  and  depth  of  a  piano.  And 
incidentally  a  small  piano  can  be 
made  to  sound  like  a  concert  grand. 
When  the  contact  unit  is  attached 
to  the  piano  of  a  dance  band,  the 
piano  becomes  more  audible  and  gives 
the  band  more  fullness — especially 
when  the  floor  noise  level  is  high. 

An  unusual  and  fortunate  use  of 
the  contact  microphone  is  in  helping 
the  deaf  to  enjoy  playing  or  hearing 


musical  instruments.  This  is  ac- 
complished by  attaching  a  contact 
unit  to  pactically  any  musical  in- 
strument, feeding  it  into  a  low  gain 
amplifier  or  radio  set  and  then  to  an 
ear  phone  or  "bone-conductor." 

Another  rather  unusual  use  that 
was  accidentally  discovered  is  in 
making  sound  effects  for  radio  and 
movie  studios.  Granulated  sugar 
dropped  on  a  piece  of  paper  placed 
over  the  contact  mike,  will  give  the 
effect  of  rain.  Talking  very  close 
and  into  the  unit  was  found  to  be 
the  best  and  easiest  way  to  obtain  a 
"telephone  voice."  Pounding  the 
chest  with  the  contact  unit  against 
it,  gives  the  illusion  of  galloping 
horses's  hoofs,  etc. 

Recording  of  a  piano  has  always 
been  difficult — especially  when  special 
rooms  are  not  available.  By  putting 
a  single  contact  microphone  on  the 
sound  board  of  the  piano,  better  re- 
cording can  be  obtained  than  with 
any  regular  type  of  microphone.  Of 
course  outside  noises  will  not  be 
picked  up. 

Home  applications 

Not  limited  to  the  professional 
field,  servicemen  will  find  the  con- 
tact unit  a  very  easy  sale  in  any 
home  where  an  instrument  is  played. 
Attach  the  unit  to  a  musical  instru- 
ment such  as  a  violin,  ukulele,  piano, 
etc.,  connect  it  to  the  radio  and  re- 
quest the  musician  to  play  with  the 
contact  unit  connected.  The  better 
tone  and  volume  of  the  instrument 
will  be  immediately  noticeable.  A 
demonstration  is  all  that  is  usually 
necessary  to  close  the  sale.  It  is  an 
extra  sale  since  it  does  not  compete 
with  anything  else  the  serviceman 
sells.  When  the  unit  is  taken  off, 
the  instrument  will  sound  rather  flat. 

Practically  any  number  of  contact 
mikes  can  be  connected  in  parallel 
and  fed  into  one  input.  In  other 
words,  a  unit  can  be  attached  to  each 
of  twenty-five  instruments  and  all  fed 
into  one  amplifier.  In  many  cases, 
the  musician  prefers  to  have  a  sep- 
arate amplifier  for  his  own  instru- 
ment. A  compact  low-gain  amplifier 
with  a  speaker  on  it  is  placed  next 
to  the  musician,  giving  a  perfect  il- 
lusion of  the  music  coming  only  from 
the  instrument. 


Webster  Electric 
Sound  Equipment 


. . .  the.  $tcUida/i$ yto  Qettesi  ^blihlLutoAi 


This  Three-Toned,  Streamlined  Mobile 
System  is  Typical  of  the  Entire  Line! 


•  Progressive,  forward-looking  distributors  are 
taking  on  sound  equipment — and  they  are  stand- 
ardizing on  Webster  Electric  Sound  Equipment — 
the  line  which  offers  the  greatest  opportunities  for 
capturing  this  expanding  market! 

Webster  Electric  Sound  Equipment  is  quality 
plus.  It  has  the  greatest  eye  appeal.  Its  tone 
quality  is  unsurpassed.  It  is  truthfully  rated.  It  is 
built  in  all  the  sizes  required  to  cover  the  portable 
and  semi-portable  market. 

The  Mobile  Amplifier  illustrated  above  is  typ- 
ical of  the  line.  It  is  truthfully  rated  at  20  watts 


with  only  5%  harmonic  distortion.  It  is  designed 
for  6-volt  storage  battery  or  110  volt  A.C.  oper- 
ation. It  is  finished  in  silver,  black  and  red  and 
can  be  supplied  with  all  the  component  parts  for 
a  complete  mobile  system. 

Write  for  full  details  of  the  Webster  Electric 
policy  which  fully  protects  the  distributor,  and 
also,  for  complete  details  of  the  entire  Webster 
Electric  line. 

Licensed  by  Electrical  Research  Products,  Inc., 
under  U.  S.  Patents  of  American  Telephone  and  Tele- 
graph Company  and  Western  Electric  Company ,  Inc. 


WEBSTER  ELECTRIC  COMPANY,  RACINE,  WISCONSIN,  U.  S.  A. 

ESTABLISHED    1909      •      Export  Dept.:  100  Varick  St.,  New  York  City      •      Cable  Address:  "ARLAB"  New  York 


A  New  Pick-Up 

Here  is  a  new  Pick-Up 
made  of  solid,  hand-rubbed 
walnut— a  finish  and  de- 
sign that  will  enhance  the 
appearance  of  modern  cabi- 
nets. It  is  fitted  with  the 
new  crystal  cartridge. 


A  New  Crystal 
Pick-Up  Cartridge 

This  new  cartridge  (Pat. 
applied  for)  is  unique  in  its 
design  and  superlative  in 
performance.  Entire  as- 
sembly is  enclosed  in  flex- 
ible molded  rubber. 


Teletalk 

Teletalk  is  the  outstanding 
electronic  inter-communi- 
cation system.  The  only 
system  which  includes 
models  to  meet  every  office 
communication  need. 


WebsterElectric 

PORTABLE  AND  SEMI-PORTABLE  SOUND  SYSTEMS  •  ELECTRONIC 
INTER-COMMUNICATING  SYSTEMS  •  ELECTRIC  PHONOGRAPH  PICK- 
UPS   .•     TRANSFORMERS   AND  FUEL    UNITS  FOR   OIL   BURNERS 


WHAT  AMPLIFIER  RATINGS  MEAN 

Facts  that  will  help  the  sound  man  select  his  equipment 


*  As  new  amplifiers  continue  to  ap- 
pear on  the  market  the  prospective  cus- 
tomer and  P.A.  man  find  it  increasing- 
ly difficult  to  compare  ratings  and 
values.  Since  equipment  for  check- 
ing amplifiers  is  not  generally  avail- 
able, and  even  if  it  were  comparative 
tests  would  be  a  lengthy  procedure, 
the  customer  must  rely  entirely  upon 
the  manufacturer's  ratings.  These 
ratings,  although  generally  authentic, 
are  often  based  upon  different  stand- 
ards of  measurement,  and  in  order  to 
compare  any  two  amplifiers,  it  is  ex- 
tremely important  that  the  various 
ways  of  rating  amplifiers  be  under- 
stood. The  amplifier  specifications  on 
pages  42  &  44  have  been  compiled  so 
as  to  list  the  data  on  a  basis  suitable 
for  comparison. 

Normal  vs.  max.  power 

At  present  the  term  "power"  may  be 
defined  in  a  number  of  ways  and  it  is 
important  in  comparing  amplifiers 
that  the  different  methods  of  power 
rating  be  understood.  The  terms  "nor- 
mal power"  and  "peak  power"  are  mis- 
leading to  the  layman  and  to  add 
further  to  the  confusion  some  ampli- 
fiers are  listed  as  capable  of  useful 
output  over  a  certain  power  range. 
If  the  output  of  an  amplifier  is  listed 
as  8  to  15  watts,  the  lower  power  of 
8  watts  is  the  normal  output,  and  the 
wave  form  flattens  abruptly  for  higher 
outputs,  even  though  the  amplifier 
may  be  capable  of  15  watts  of  highly- 
distorted  power.  In  all  cases  the  nor- 
mal rating  is  the  true  output  of  the 
amplifier,  states  S.  Douglas  Fortune 
of  Thordarson  Elec.  Mfg.  Co. 

Practically  any  amplifier  is  capable 
of  an  output  of  twice  its  normal  value. 
Fig.   1A   shows   the   sine   wave   output 


Fig.   1 — Waveform  of  various  outputs. 

of  an  amplifier.  The  effective  value 
of  the  peak  value  E  is  .707E,  and  the 
power  output  varies  as  (.707E)2  or 
54  E2.  If  now  the  amplifier  be  over- 
driven so  that  Fig.  1C  is  the  result, 
the  effective  value  is  very  nearly  E, 
so  that  the  power  varies  as  E2  which 
is  twice  the  normal  value  of  'AE-.  The 
distortion  in  a  square  wave  is  ex- 
tremely high. 

Sometimes  the  value  of  "peak 
power"  for  a  given  amount  of  distor- 
tion is  listed.  For  instance  an  ampli- 
fier may  be  rated  at  20  watts  normal 
and  25  watts  peak.  This  peak  rating 
usually  contains  from  10  to  15  per 
cent  distortion.  Although  this  method 
is    somewhat    more    conservative    than 


the  previous  method  of  peak  power 
rating,  it  does  give  the  power  rating 
with  a  flat  topped  wave,  which  is  sim- 
ilar to  that  of  Fig.  IB.  In  compar- 
ing power  rating  it  is  important  to 
place  all  values  of  peak  power  second- 
ary to  the  normal  rating  which  is  the 
true  output  of  the  amplifier.  Naturally, 
the  greater  the  peak  power  for  a  given 
normal  poicer,  the  lower  the  distortion 
will  be  when  overloading  takes  place. 
"Distortion"  as  well  as  "power" 
may  be  interpreted  in  a  number  of 
ways.  Some  manufacturers  lacking  the 
facilities  for  actually  measuring  dis- 
tortion list  the  total  amplifier  distor- 
tion as  that  given  by  the  tube  manu- 
facturer. The  distortion  figure  listed 
by  the  tube  manufacturer  in  no  way 
accounts  for  practical  limitations  en- 
countered in  actual  design  or  varia- 
tion normally  encountered  in  tube 
characteristics.  Distortion  figures  may 
be  accepted  as  authentic  only  if  a  dis- 
tortion curve  is  run  with  a  representa- 
tive set  of  tubes,  such  as  in  chart  on 
page    32. 

"Undistorted"  output 

Some  manufacturers  list  the  output 
of  their  amplifiers  as  "undistorted 
power."  Distortion  under  5  per  cent  is 
usually  considered  negligible  and  an 
amplifier  with  5  per  cent  distortion 
may  be  considered  as  having  "undis- 
torted output,"  although  the  term  has 
been  applied  so  loosely  that  it  may 
now  mean  an  output  with  practically 
any  amount  of  distortion,  and  it  should 
not  be  assumed  that  an  amplifier  with 
"undistorted  power  output"  has  neces- 
sarily less  than  5  per  cent  distortion. 
In  the  amplifier  specifications  on  pages 
42  &  44,  the  distortion  at  normal  rated 
output   is   given. 

(To  page  46) 


Fig.  2 — Distortion  vs.  frequency  characteristics  of  a  typical 
amplifier   at   rated   output. 


38 


Fig.    3 — Normal    amplifier    frequency    response    is    center 
curve.    Other  curves  show  effect  of  tone  controls. 


Radio  Today 


'  %  V/i'  <fi< 


Sound  Amplification/  mUB^ 


UtflE01* 


e«.ocfcW|,°*.eBStim«- 
,ati0nt.r«»^iV<,y 


COMMERCIAL  SOUND  SECTION  *  *  *  SCA  MANUF  ACTURtNG  CO.,  INC. 
CAMDEN,  N.J.  U.S.A. 


An  Almost  Limitless  Field  of  Prospects 

For  your  convenience,  some  of  these  are  listed  below 


Night  Clubs 
Country  Clubs 
Churches 

Government  Depts. 
Hotels 
Resorts 
Hospitals 
Industrial  Plants 
Business  Offices 
Roadside  Stands 


Beer  Gardens 
Department  Stores 
Auction  Rooms 
Theatres 
Dance  Halls 
Amusement  Parks 
Public  Schools 
Colleges 
Airports 
Bus  Stations 


Again  RCA  gives  you  a  large  profit  oppor- 
tunity .  .  .  offers  you  a  well  organized  mer- 
chandising plan . . .  tried  and  proved  selling 
plans... sales  promotion  aids... engineering 
assistance . . .  powerful  national  advertising 

PLUS  the  Most  Complete  Line 

of  Sound  Equipment  in  the  World 

-Priced  in  Your  Interest! 

Selling  sound  is  big  business!  And  if  you're  not 
in  it  you're  passing  up  juicy  profits  every  day!  For 
your  field  of  prospects  is  wide  and  varied.  And 
the  prices  of  RCA  Commercial  Sound  Equipment 
make  your  every  sale  well  worth  while!  Installa- 
tions range  in  price  from  $80  to  $10,000  and  up. 
RCA  offers  you  a  valuable  franchise  — another 
important  link  in  the  RCA  All  The  Way  chain. 
Take  advantage  of  this  offer!  If  you  do  nothing 
more,  investigate  the  plans  that  have  been  made 
for  your  profit.  You  have  nothing  to  lose— every- 
thing to  gain.  Your  RCA  distributor  has  full  de- 
tails. Get  in  touch  with  him  NOW ! 


April,  1938 


39 


NEW  SOUND  ITEMS 


25-watt  amplifier 

•k  Amplifier  with  multi-stage  in- 
verse feedback.  Power  output  of  25 
watts  with  2i^  per  cent  distortion. 
Frequency  flat  within  1%  DB  from 
50  to  10,000  cycles.  Webster-Chicago 
Model  2L-25.  Webster  Co.,  5622 
Bloomingdale  Ave.,  Chicago,  111. — 
Radio  Today — see  also  advt.  p.   27. 


Clarion  30-watt  sound  system 

■*  Fixed  type  sound  system  hav- 
ing 30-watt  output  with  7  per  cent 
distortion.  Uses  two  12-inch  speak- 
ers with  flare  baffles.  Gain  of  131 
DB  with  1  meg  input  resistance. 
Uses  6L6  tubes.  Inverse  feedback, 
luminous  glo  dials.  Multi-imped- 
ance output  transformers.  Trans- 
former Corp.  of  America,  69  Woos- 
ter  St.,  New  York,  N.  Y. — Radio  To- 
day— see  also  advt.  p.   43. 


Talking  door  interphone 

•k  Wired  type  interphone  for  use 
in  providing  communication  with 
visitor  at  the  door.  Eliminates  need 
of  going  to  door  for  peddlers  and 
salesmen.  Housewife  can  find  out 
who  is  there  without  opening  door. 
Uses  3-tube  amplifier  and  PM 
speakers.  Consumes  no  current 
when  not  in  use.  Requires  no  drill- 
ing in  door,  just  fastens  to  inside  of 
door.  List  $29.95.  Regal  Amplifier 
Co.,  16  W.  17th  St.,  New  York.,  N.  Y. 
— Radio  Today — see  also  advt.  p.  47. 


Lafayette  sound  system 

■*•  70-watt  sound  system  with 
100-watt  peak  output.  Push-pull 
parallel  beam  power  tubes.  Auto- 
matic volume  control  or  volume  ex- 
pansion. Mixing  and  fading  facil- 
ities for  4  input  channels.  Four 
heavy-duty  PM  speakers,  two  mikes 
supplied.  Housed  in  3  carrying 
cases.  Wholesale  Radio  Service  Co., 
100  Sixth  Ave.,  New  York,  N.  Y.— 
Radio  Today — see  also  advt.  p.  49. 


Operadio  amplifier 

+  35-watt  sound  amplifier.  Three 
input  channels — electronic  mixer. 
Distortion  of  only  5  per  cent.  Can 
be  used  with  all  types  of  mikes. 
Gain  of  134  DB.  Non-resonant 
equalizer  used  as  tone  balancer  for 
high  and  low  frequencies.  Base 
type  mounting — can  be  bolted  to 
standard  19-inch  rack.  Supplies 
field  to  2  speakers.  Operadio  Mfg. 
Co.,  13th  St.,  St.  Charles,  111.— Radio 
Today — see  also  advt.  p.  41. 


Vocagraph  mobile  amplifier 

*  30-watt  sound  system  for  use 
on  AC  or  6-volts  DC.  Beam  power 
output  tubes.  Built-in  AC  power 
pack.  Changeover  accomplished  by 
flip  of  a  switch.  Complete  acces- 
sories available.  Model  30-M30  am- 
plifier— list  $109.  Vocagraph  Sound 
System,  164  N.  May  St.,  Chicago,  111. 
— Radio  Today- — see  also  advt.  p.  48. 


Power  amplifiers 

*  Booster  type  amplifiers  for 
use  with  any  sound  system.  Beam 
power  output  stages  with  inverse 
feedback.  Built-in  driver  stage.  Fa- 
cilities for  electrically  excited 
speakers.  Available  in  25-watt  and 
60-watt  outputs.  Modern  -  styled 
cases.  Allied  Radio  Corp.,  833  W. 
Jackson  Blvd.,  Chicago,  111. — Radio 
Today. 


Velotron  microphone 

+  No  voltage  velotron  micro- 
phone. Output  level  of  —50  DB.  Bi- 
directional characteristic.  Substan- 
tially free  from  peaks.  Can  be  used 
with  runs  up  to  1,000  feet.  Requires 
no  matching  transformer — works 
into  grid  of  tube.  Units  may  be 
used  in  parallel.  Available  in  high, 
medium  and  low-pitch  types.  List 
$22.50  less  cable.  Bruno  Labs.,  30 
W.  15th  St.,  New  York,  N.  Y  —  Ra- 
dio Today. 


Bogen  mobile  amplifier 

•At  Universal  type  mobile  ampli- 
fier for  6-volts  DC  or  110  AC.  Con- 
version accomplished  by  changeover 
switch.  28-watts  undistorted  out- 
put. Universal  mike  input.  Tapped 
output  impedances.  Electronic  mix- 
ing. Stand-by  switch  for  saving 
battery  consumption.  Crystal  type 
pick-up.  Model  C28— list  $132.50. 
Phono  assembly — $49.50.  David  Bo- 
gen Co.,  663  Broadway,  New  York, 
N.  Y. — Radio  Today — see  also  advt. 
p.  47. 

(Continued  on  page  43) 


40 


Radio  Today 


*  ADJUST  VOLUME    FROM    ANY    POINT    IN    THE   AUDIENCE 


*   WvUuud  GOING   BACK  TO  AMPLIFIER 


*   Witkcud  MOVING  AMPLIFIER  WITH  YOU 


MODEL  410— PORTABLE  P.  A.  UNIT  . . . 


14  Watts 
Has  same  features  as 
Model  41  4,  but  is 
smaller,  more  compact. 
Ideal  for  carnivals, 
side-shows,  conces- 
sions, etc  Heavy  duty 
8  in  b  permanent 
magnet  dynamic  speak- 
ers mounted  in  sepa- 
rate carrying  case. 
Moderately  priced. 


MODEL  172— MOBILE  P.  A.  SYSTEM  . . . 

25  Watts 

A  mobile  P.  A.  system  that  combines 
AC-DC  hi    ONE   CASE.    Instantly 
available  for  either  voltage  without 
removal  of  packs.    Latest  dynamic 
type  microphone  specially  designed 
for  Sound  Truck 
work.  Unaffected 
by   wind   and  ad- 
verse climatic  con- 
ditio ns.   Moder n, 
streamlined  ap- 
pearance. Provi- 
sions for  Remote 
Volume  Control, 
Headphone    and 
Meter  Monitoring. 

Export  Division:  145  W.  45th  St.,  New  York  City 


•  A  development  in  P.  A.  equipment  as  revolutionary  as  the 
self  starter  on  an  automobile.  Remote  volume  control  from 
any  point  within  hearing  range.  Get  full  details  now  about 
Model  414,  and  this  GREAT  New  Selling  feature. 

PLUS  THESE  GREAT  FEATURES: 

PROTECTED  RECESSED  ILLUMINATED  CONTROLS  . . .  FULL  14  WATTS 
OUTPUT;  HIGH  GAIN  .  . .  BEAM  POWER  TUBES  .  . .  CATHODE  DEGEN- 
ERATION ...  3  CHANNEL  INPUT  ...  12'  HEAVY  DUTY  PERMANENT 
MAGNETIC  DYNAMIC  SPEAKERS  .  .  .  PROVISIONS  FOR  HEAD  PHONE 
AND  METER  MONITORING  .  .  .  PROVISION  FOR  PAGING  SWITCH 
CONTROL  ESPECIALLY  DESIGNED  FOR  BEAM  POWER  TUBES  .  .  . 
SMALL,  LIGHTWEIGHT,  COMPACT  . . .  WITHOUT  SACRIFICING  TONE 
QUALITY  .   .  .  ATTRACTIVE  TWO-TONE  GRAY  CARRYING  CASES. 

See   How   Remote  Volume    Control    Works! 


1 MAIL    THE     COUPON! 

1   OPERADIO  MANUFACTURING  COMPANY 
Dept.  R.T.  4,  St.  Charles,  Illinois 

Please  send  me  complete  data  on  the  REMOTE  VOLUME  CONTROL 
feature  of  Model  414  Portable  P.  A.  Unit. 


Name 

Street  Address . 
City. 


I   D  Model  410  Portable  P.  A.  Unit 


State 

□  Model  172  Mobile  P.  A.  System 


OPERADIO  MANUFACTURING  COMPANY  STrLLcZL,ES 


April,  1938 


41 


AMPLIFIER  AND  SOUND  SYSTEM  SPECIFICATIONS 


Compiled  by  Radio    Today 


Amp. 
model 
No. 

S.  S. 
model 
No. 

Amp. 
list 
price 

S.  S. 
list 
price 

Rated 

watt* 

% 
dis- 
tor- 
tion 

Max. 

tvatts 

Gain              No.  of  No.  of 

inputs  mixers 

DB         Input 
resist 

No.  of 
tone 
con- 
trols 

No.  of 
tubes 

Output 
Tubes    Class 

Line 
watts 

Power 
source 

Speakers 

No.  &  Type 
size 

Type    Phono 
mike     turn- 
table 

Allied  Ra 

B12110 

B121O0 

B12120 

B12130 

B12140 

B12160 

dio  Corp.,  833  W.  Jackson  Blvd., 
B12111           $  25.00        $  49.50 
B12101               29.50            84.50 
B12121               59.95          149.95 
B12131               70.00          165.00 
B12141               95.00          205.00 
B12161             112.50          297.50 
B12118             150.00 

B12119                                 170.00 

Chicago 
10 
10 
20 
25 
40 
60 
18 
18 

111.—' 

7% 

3 
3 

5 
5 
5 
5 

Knight" 

11           70 
11         110 
25         115 
30         120 
55         124 
70         130 
25         115 
25         115 

200  ohms 
2  Meg. 
2  Meg. 
2  Meg. 
2  Meg. 
2  Meg. 
2  Meg. 
2  Mee. 

2 
2 

4 
4 
6 
6 
2 

2 

2 
2 
3 
3 
6 
6 

2 

.     1 
1 
2 
2 
2 
2 
1 
1 

3 
5 
8 
8 
14 
16 
6 
6 

1-6L6G 
1-6L6G 
2-6L6G 
2-6L6G 
2-6L6G 
2-6L6G 
2-6N7G 
2-6N7G 

ABi 
ABi 
ABi 
ABi 
AB2 
AB2 
B 

B 

45 
60 

150 
160 
180 
225 

NS 

NS 

AC 
AC 
AC 
AC 
AC 
AC 

6V.DC 
(6V  D.C. 

1-8^" 
1-8M" 
2-12" 
2-12" 
2-12" 
4-12" 
2-12" 
J2-12" 

EE 
EE 
PM 
PM 
PM 
PM 
EE 
PM 

Carb. 

V 

V 

V 

V 

V 

C 

C 

No 
No 

No 
No 

No 
No 
Yes 
Yes 

B121T0 
B12171 

B12172 

120.00 
105.00 
rica,  37  V\ 
120.00 
175.00 
225.00 
310.00 
395.00 
150.00 
200.00 
250.00 
330.00 
420.00 

95.00 
115.00 
175.00 
115.00 
150.00 

80.00 

85.00 

90.00 
100.00 
120.00 
145.00 
supplied  o 

210.00 

25            5        32        120          2  Meg.          4            3              2 
25          3-5       30        120          2  Meg.          4            3              2 
..,  New  York,  N.  Y.— "ACA  Gold  Medal  Amplifiers" 

15             5         25         110           1  Meg.           NS         2               3 
25            5        30        110          1  Meg.          NS         2              3 
35             5         42         110           1  Meg.           NS         2               3 
50            5        60        110          1  Meg.          NS         2              3 
70             5         90         115           1  Meg.           NS         2               3 
15            3        22        125          1  Meg.          NS         2              3 
25             3         32         125           1  Meg.           NS         2               3 
40            3        50        125          1  Meg.          NS         2              3 
50            3        60        125           1  Meg.          NS         2              3 
80             3         92         125           1  Meg.           NS         2               3 

24  2.5        30         112           1  Meg.           NS         2               2 
32             3         40         133           1  Meg.           NS         2               2 
64             5         72         136           1  Meg.           NS         2               2 
96            6      110          35          1  Meg.          NS         NS         NS 

128            6      150          38          1  Meg.          NS         NS         NS 
12            5        19        120          1  Meg.          NS         2              2 
18             5         22         135           1  Meg.           NS         2               2 
20            5        30        102          1  Meg.          NS         2              1 

25  6        30          94          1  Meg.          NS         2              1 
40             5         50         105           1  Meg.           NS         2               1 
50             6         60           97           1  Meg.           NS         2               1 

1  and  6V  D.C.  systems  only.            fAvailable  at  increased  cost. 

9 
9 

8 

8 

8 
12 
12 

8 

8 
12 
12 
NS 

6 

7 
10 

8 
12 

5 

6 

6 
9 
9 

2-6L6G 
6L6G 

6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6L6G 
6F6G 
6F6G 
5V4G 
6N7G 
5V4G 
6N7G 

ABi 
AB2 

A 

A 

ABi 

AB1 

A 

A 

A 

ABi 

ABi 

AB2 

ABi 

ABi 

ABi 

ABi 

ABt 

A 

ABi 

AB 

B 

AB 

B 

84 
160 

85 

95 
100 
120 
130 
85 

95 
100 
115 
150 

95 
115 
130 

95 
150 

85 

95 
100 
110 
120 
130 

j  6V  D.C. 
1110  V  A.C 

AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 
AC 

\2-12" 

PM 

EE* 

EE* 

EE* 

EE* 

EE* 

EE* 

EE* 

EE* 

EE* 

EE* 

EE 

EE 

EE 

EE* 

EE* 

EE 

EE 

EE 

EE 

EE 

EE 

C 

C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D.V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 
C-D.V 
C-D-V 
C-D-V 
C-D-V 
C-D-V 

Yes 

No 

Not 

Not 

Not 

Not 

Not 

Not 

No' 

No 

No 

No 

No' 

No' 

No 

No 

No- 

No 

No 

No 

No 

No" 

No- 

Amplifier  Co.  of  Ame 

15A 

'est  20th  S 

25A 

310.00 
465.00 
770.00 

35A 

50A 

70A 

15E 

25E 

40AB 

50E 

80E 

24A 
32A 
64A 
96A 

24S 
32S 
64S 

12S 
18S 
20S 
25S 
40S 
50S 
PM  Speakers 

2-12" 
2-12" 
4-12" 

128A 

1-12" 
1-12" 
2-12" 
2-12" 
2-12" 
4-12" 

12D 
18D 

20A 
25B 

40A 
50B 

195.00 
245.00 
310.00 
370.00 
460.00 
490.00 
n  Universa 

Audio  Development 

28A 

Co.,  4347  I 

$  44.50 

69.00 

69.00 

88.50 

58.00 

Inc.,  61  E 

$  60.00 

75.00 

125.00 

185.00 

44.50 

115.00 

"ranee  Ave 

,  Minneapolis,  Minn. 
12           NS       NS 

23  NS       NS 
17          NS       NS 
33           NS       NS 
10           NS       NS 

3olumbus,  Ohio 
12             2)4     18 

24  2         34 
35             2         42 
60             2         80 

8             5         10 

24             2         34 

125 
126 
128 
128 
120 

124 
130 
132 
140 
102 

130 

2  Meg. 
2  Meg. 
2  Meg. 
2  Meg. 
2  Meg. 

5  Meg. 
5  Meg. 
5  Meg. 
5  Meg. 
5  Meg. 

5  Meg. 

2 
3 
3 
3 
2 

3 
4 
4 
5 
2 

4 

2 
2 
2 
2 
2 

2 
3 
3 
6 
1 

3 

1 
1 
1 
1 
1 

1 
2 
2 

2 

1 
2 

6 
7 
7 
9 

7 
7 
8 
15 
5 

7 

2-6V6 
2-6L6 
2-2A3 
4-2A3 
4-25L6 

2-6V6G 
2-6L6G 
2-6L6G 
4-6L6G 
2-6F6G 

2-6L6G 

ABi 
AB1 
ABi 
ABi 
AB! 

ABi 
ABi 
AB! 
AB 

A 

ABi 

NS 
NS 
NS 
NS 
NS 

90 
120 
130 
185 

75 
/102 
\120 

70 

AC 
AC 
AC 
AC 
DC 

AC 

AC 

AC 

AC 

AC 

6V  D.C. 

110V  A.C. 

PM 

PM 
PM 
PM 
PM 
PM 

PM 

C 

C 
C 
C 
C 
C 

C 

No 

29A 

$144.00 

2-10" 

No 

30A 

No 

31A 

No 

32A 

No 

Bell  Sound  Systems 

412               PA412 
424               PA424 
435               PA435 
460               PA460 
408               PA408S 

D-24            M-24 

Good  ale, 
$129.50 
187.50 
259.00 
418.50 
94.00 

230.00 

2-10" 
2-12" 
2-12" 
2-13" 
1-10" 

}2-12" 

No 
No 
No 

No 
No 

Yes 

407 

PA407S 

NS 

69.50 

7 

7 

10 

90 

5  Meg. 

2 

2 

1 

3 

1-6L6G 

A 

AC 

1-10" 

EEi/HAltype 

JNo 

No 
No 
No 
No 

David  Bogen  Co.,  Ini 

C6                CP6VT 
CIO             CP10VT 
C12             CP12VT 
AD6            

:.,  663  Bro 
$  32.25 
47.50 
55.75 
47.25 
72.50 
45.25 
75.75 
75.75 

adway,  Ne 

$  71.50 

79.00 

98.50 

»v  York, 

6 
10 
12 

6 
10 

6 
15 
15 

N.  Y- 
5 
5 
5 
5 
5 
5 
5 
5 

-"Supreme  Fidelity" 

9         123           y2  Meg. 
12         125           y2  Meg. 
14.6      128           y2  Meg. 
7.2        122           y2  Meg. 
11.8      124           y2  Meg. 
14         123           H  Meg. 
20         128           y2  Meg. 
20         128           y2  Meg. 

2 
2 
2 
2 
2 
2 
4 
4 

2 
2 
2 
2 
2 
2 
2 
2 

1 
1 
1 
1 
1 
1 
1 
1 

4 
5 
6 

7 
11 
4 
8 
8 

1-6L6G 

2-6V6 

2-6N6 

2-25L6 

4-25L6 

1-6L6 

2-6N6 

2-6N6 

ABi 

A 

A 

A 

A 

A 

A 

A 

73 
88 
112 
52 
100 
83 
125 
125 

AC 

AC 

AC 

AC-DC 

AC-DC 

AC 

AC 

AC 

1-8" 

2-10" 

2-11" 

2-10" 

EE 
PM 
EE 

PM 

EE 
EE-I 

SV 

SV 

.  SV 

AD10 
SM6 

ADP10 

136.00 

V 

No 
No 

C15 
CX15 

CP15VT 
CPX15VT 

132.75 
158.50 

2-10" 
2-12" 

SV 
MSV 

No 
No 

C12-15 

CP12-15 

70.75 

115.00 

15 

5 

22 

124 

y2  Meg. 

2 

2 

1 

7 

2-6V6 

ABi 

80 

/  6V  DC 
1  110VA.C. 

J2-10" 

PM 

SV 

No 

CX18 
CX30 

CPX18V 
CPX30V 

93.50 
123.70 

189.50 
224.00 

18 
30 

5 
5 

25 
42 

125 
131 

M  Meg. 
H  Meg. 

4 

4 

2 
2 

2 
2 

10 
12 

2-6N6 
2-6L6 

ABi 
ABi 

125 
175 

AC 
AC 

2-12" 
2-12" 

EE-PM       V 
EE-PM  V 

No 
No 

C28 

CP28VT 

132.50 

202.50 

28 

5 

36 

115 

HMeg. 

2 

2 

1 

6 

2-6L6 

ABi 

165 

J6V.  DC 
\110V.  AC 

AC 

AC 

AC 

AC 

AC 

}2-12" 
2-12" 

PM 

SV 

No 

C30 
CX70 

CP30VT 

95.60 
189.50 
126.00 
159.50 
159.50 
s. 

184.50 

30 
70* 
100 
12 
12 

5 
3.8 

5 
5 
5 

42 

100 

130 

14.5 

14.5 

122.5 
124.5 

17 
128 

128 

y2  Meg. 
M  Meg. 
15-500  ohms 
H  Meg. 
li  Meg. 

4 
6 
1 
2 
2 

2 
4 
None 
2 
2 

1 
2 

Nont 
2 
2 

8 
17 
7 
6 
6 

2-6L6 
4-6L6 
4-6L6 
2-6N6 
2-6N6 

ABi 

ABi 

AB2 

A 

A 

175 
290 
300 
113 
113 

EE-PM  SV 

PM      None 
PM      SV 

No 

No 

C100 

No 

PM12          PM12 
PM12          PM12VT 
♦Two  35  watt  channe 

159.50 
189.00 

1-10" 
1-10" 

Yes 
Yes 

McMurdo  Silver  Cor 

3B 

p.,2900S< 

$  49.00* 

17.50 

2-6F8G 

.  Michigar 

Ave.,  Chicago,  111. — "Masterpiece" 

20            3        25        NS           1  Meg.          1           

1       15&53     1  Meg.          2            2           

.o  35  Db.  Expansion  controlled  by  potentiometer.  List  price  $12.00. 

4       2-6L6G      ABi          85       AC 
3       6J5G          A              75       AC-DC 
Average  gain  as  amplifier  +15  Db.  As  exj. 

1-15" 

EE 
ODb. 

None 

No 

Pre-Amp 
2B— Voii 

IB 

lme  expander 
:ludes  speake 
eproducer  C 

21E 

12 

20B 

20 

27 
Mo.  1 
<!o.  2 

Tubes.     0 

ander — ] 

Miles  R 

M-02-2 

M-02-3 

M-02-5 

M-02-6 

M-02-7 

AC-DC  1 

AC-DC] 

o.,  Inc.,  812  Broadway,  New  York,  N.  Y. — 
$79.50        $189.50          20           NS       20 
195.00          725.00          60           NS       60 
85.00          230.00          26           NS       30 
120.00          470.00          52           NS       60 
62.50         175.00         15          NS       15 
62.50         175.00           6          NS         8 
120.00         230.00         15          NS       15 

"Miles' 

120 
125 
115 
115 
115 
NS 
NS 

MMeg. 
y2  Meg. 
HMeg. 
y2  Meg. 
y2  Meg. 
y2  Meg. 
H  Meg. 

3 
4 
3 
3 
3 
3 
3 

3 
4 
3 
3 
3 
3 
3 

6 
11 
5 
9 
6 
6 
9 

6L6 

6L6 

6A6 

6A6 

25L6 

25L6 

25L6 

A 
A 
B 
B 

A 
A 
A 

120 

160 

NS 
NS 
NS 
NS 
NS 

AC 

AC 

6VDC 

6VDC 

DC 

AC-DC 

AC-DC 

2-10" 
8-12" 
2-12" 
6-12" 
2-12" 
2-12" 
2-12" 

PM 
PM 
PM 
PM 
PM 
PM 
PM 

C-V 
C-V 
C-V 
C-V 
C-V 
C-V 
C-V 

No 
NS 
No 
No 
No 
No 
No 

Montgomery  Ward  &  Co.,  W. 

3014             3012                 $31.95 
2925             2929                   42.95 
3240             3241                    54.95 
3560             3561                    59.95 
3600             3601                    79.95 
2803V          2804                   14.66 
2020             2021                    64.95 
2569             2570                   84.95 

2538            2536                  95.75 

Chicago  &  N.  Larr 
$  55.95         15 
72.95          25 
89.95          40 
115.00          60 
129.00        100 
37.95              8 
89.95          25 
99.95          25 

135.00         32 

Chicago,  III.— 
7         18 
5        40 

5         55 
5        90 
5       210 
5        12 
5        30 
5        30 

5        38 

-"Airline" 

120          2  Meg. 
115          2  Meg. 
125          2  Meg. 
125          2  Meg. 
120           2  Meg. 
125          2  Meg. 
120          2  Meg. 
125          2  Meg. 

115          2  Meg. 

3 
3 
3 
3 
3 
2 
3 
2 

3 

3 
3 
3 
3 
3 
2 
3 
2 

3 

7 
9 
9 
13 
15 
6 
6 
5 

6 

6F6G 

6L6G 

6L6G 

6L6G 

6L6G 

42 

6N7 

6L6G 

6L6G 

ABi 

ABi 

AB! 

ABi 

ABj 

A 

ABi 

AB) 

AB! 

85 
150 
175 
'250 
400 
75 
90 
90 

125 

AC                1-10" 
AC                1-12" 
AC                2-12" 
AC                4-12" 
AC                4-12" 
AC                1-10" 
6V.  DC         1-12" 
6V.  DC         2-12" 
/llOV.ACl  ,  .,„ 
\6V.  DC  J 

PM 
PM 
PM 
PM 
PM 
PM 
PM 
PM 

PM 

Choice 
Choice 
Choice 
Choice 
Choice 
Choice 
Choice 
Choice 

Choice 

No 
No 
No 
No 
No 
No 
No 
Yes 

Yes 

Operadlo  Mfg.  Co., 
813               108 
1010             410 
822P             124W 
835               

13th  &  Ind 
$  36.50 
54.00 
83.00 
120.00 
123.00 
184.00 
81.00 
180.00 

iana,  St.  C 

$  86.50 

110.00 

207.00 

harles,  111. — "Operadio" 
8            5        15        126 
14            5        20        130 
22             5         40         131 
35             5         52         134 
70            5      104          28 
55            5        80        139 
65 
25             5         35         130 

2H  Meg. 
2H  Meg. 
2y2  Meg. 
2H  Meg. 
1000  ohms 
2H  Meg. 
2H  Meg. 
2J^  Meg. 

2 
3 
3 
3 

4 
2 
2 

2 

2 
3 
3 
1 
5 
2 
2 

4 
7 
7 
7 
7 
13 
4 
6 

6L6G 

6V6G 

6L6G 

6L6G 

6L6G 

6L6G 

76 

6L6G 

A 

A 

A 

AB 

AB 

AB 

A 

A 

75 
90 
125 
130 
210 
150 
25 
100 

AC 
AC 
AC 
AC 
AC 
AC 
AC 
6V.  DC 

1-10" 

2-8" 

2-12" 

EE 
PM 
EE 

PM 

C 

SV 

sc 

D 

No 
No 
No 
No 

870 

No 

855 

No 

)660 
172 

No 

162 

255.00 

2-12" 

Yes  1 

Pacent  Engineering  Corp.,  79  Madison  Ave..  New  York, 
A15            PA150               NS              NS            11            3 
A30              PA300               NS               NS              25             3 
A50             PA500             NS              NS             40            3 
A100                                   NS              NS            100          NS 
ADC15                               NS              NS              11            3 

N.  Y. 
20 
50 
70 
NS 
18 

NS 
NS 
NS 
NS 
NS 

NS 
NS 
NS 
NS 
NS 

4 
4 
4 

2 

2 
3 
3 

2 

3 
2 
2 

1 

7 
9 

10 
4 

18 

6L6G 
6L6G 
6L6G 
RK12 
25L6 

A 

A 

ABi 

B 

A 

NS 
NS 

NS 
NS 
NS 

AC 
AC 
AC 
AC 
AC-DC 

2-10" 

NS 
NS 
NS 
NS 

EE 

NS 
NS 
NS 
NS 

V-C 

NS 
NS 
NS 
NS 

NS 
NS 
NS 
NS 
NS 

COOES — NS — Data  not  supplied.    EE — Electrically  excited  fleld.    PM — Permanent  magnet  Held.    C — Crystal.    Carb — Carbon.    D — Dynamic.    SC — Sound  cell.    SV — Static  velocity.  V — Velocity. 


NEW  THINGS 

(Continued  from  page  40) 


P.M.  dynamic  horn  unit 

*  Permanent  magnet  speaker 
unit  with  efficiciency  equal  to  elec- 
trically excited  units.  Will  handle 
25  watts  continuously  and  50  watts 
peak.  Hard  drawn  duralumin  dia- 
phragm. Alnico  magnet.  Weather- 
proof design.  15  ohm  voice  coil  at 
1,000  cycles.  Weight  8%  pounds. 
Model  P.A.— list  540.  University 
Labs.,  191  Canal  St.,  New  York,  N. 
Y. — Radio   Today. 


Mobile  sound  system 

*  Combination  6-volt  and  110 
AC  sound  system.  PM  dynamic 
speakers  to  reduce  battery  drain. 
Turntable  has  separate  power 
switch — crystal  pick-up.  Three  in- 
put channels  electronically  mixed. 
Conversion  accomplished  with  con- 
necting cables.  Model  M-24.  Bell 
Sound  Systems,  Inc.,  61  E.  Goodale 
St.,  Columbus,  Ohio — Radio  Today 


Sound  truck  power  plant 

•  300-watt  110-volt  60-cycle  AC 
power  plant  for  use  in  sound  trucks. 
Also  supplies  25  amps  DC  at  6  volts 
for  battery  charging.  Speed  1,800 
r.p.m.  Self-cranking  when  used 
with  storage  battery.  Remote  con- 
trol starting  available.  Shielded 
ignition  and  radio  filter.  Weight 
125  pounds.  Model  21A.  Special 
muffler  available  to  reduce  exhaust 
noise.  Kato  Engineering  Co.,  727 
S.  Front  St.,  Mankato,  Minn.— Ra- 
dio Today. 


1  he  C.I.S.E.  Plan  has  revo- 
lutionized sound  distribu- 
tion. Organized  late  in  '37 
to  give  the  sound  business 
back  to  the  sound  special- 
ist, the  Plan  caught  on 
instantly.  It  abolished  cut- 
throat selling,  meager 
profits,  all  the  old  confusion  rampant  in  the  P.A.  field. 

Sound  men  were  wild  with  enthusiasm.  Here  was  what  they 
needed1.  Here  was  a  plan  enabling  sound  specialists  to  buy 
direct  from  the  factory.  Here  was  a  way  to  sell  sound  equip- 
ment on  an  even  basis  with  every  distributor  and  manufacturer 
in  the  land. 

The  flood  of  requests  for  charter  membership  was  so  tremendous 
that  only  now  are  we  in  a  position  to  consider  further  applica- 
tions. Do  you  want  to  join  the  C.I.S.E.?  Would  you  like  to  enjoy 
the  untold  benefits,  the  prestige  and  protected  profits  this  Plan 
offers  you? 

Then  mail  the  coupon  today.  It  is  your  application  for  member- 
ship in  the  C.I.S.E.  The  new  Spring  listing  of  Clarion  highest- 
quality  sound  equipment  is  ready  —  prices  lower  than  ever 
before.  But  —  only  C.I.S.E.  agents  are  authorized  to  handle 
Clarion  sound  equipment.  You  can  be  the  official  distributor  in 
your  territory  .  .  .  it  you  hurry.  Mail  this  coupon  now! 


TRANSFORMER  CORPORATION  OF   AMERICA 


CLARION  INSTITUTE 
OF  SOUND  ENGINEERS 
69  WOOSTER  ST.,  N.Y.C 


CLARION  INSTITUTE  OF  SOUND  ENGINEERS 
49    WOOSTER    STREET,    NEW    YORK    CITY 

Please  send  me  an  application  form  immediately.  I  want  to 
belong.  This,  in  no  way  obligates  me,  of  course.  RT-4 

Name 

Address , 

City State 


paste  coupon  on  penny  post  card 


April,  1938 


43 


AMPLIFIER  &  SOUND  SYSTEM  SPECIFICATIONS  — 

Con't.— 

-Compiled  by 

Radio  Today 

Amp. 

S.  S. 

Amp. 

s.  s. 

Rated       % 

Max. 

Gain 

No.  of 

No.  of 

No.  of 

No.  of          Output 

Line 

Power 

Speakers 

Type 

PhonJ 

model 
No. 

model 
No. 

list 
price 

list 
price 

watts 

dis- 
tor- 

watts 

inputs 

mixers 

tone 
con- 

mike 

DB 

Input 

Tubes 

Class 

No.  & 

Type 

turn- 
tablt 

tion 

resist 

trols 

size 

Peerless 

%adio  Co., 

1054  Dewey 

Ave.,  Rochester. 

N.Y.— " 

Peerless" 

P-7 

0-7 

$85.00 

$250.00 

12 

NS 

16 

90 

H  Meg. 

2 

2 

1 

5 

2A3 

A 

130 

AC 

2-12" 

EE 

None 

No    | 

P-7 

D-7 

85.00 

150.00 

12 

NS 

16 

120 

Yz  Meg. 

2 

3 

2 

6 

2A3 

A 

100 

AC 

1-14" 

EE 

C 

No 

P-7 

R-7 

85.00 

200.00 

12 

NS 

16 

90 

M  Meg. 

2 

2 

1 

6 

2A3 

A 

130 

AC 

2-12" 

EE 

C 

No    1 

P-777 

D-777 

165.00 

350.00 

36 

NS 

48 

120 

lA  Meg. 

2 

3 

3 

12 

2A3 

A 

250 

AC 

11-14"! 
\2-12"J 

EE 

c 

No 

P-3 

C-3 

35.00 

65.00 

3 

NS 

6 

90 

400  ohms 

1 

1 

3 

2A3 

A 

90 

AC 

1-6" 

EE 

Carb 

No 

Radolek  Co.,  601  W. 

Randolph  St.,  Chicago,  111.— 

"Radolek" 

R15085 

R15089 

$24.25 

$30.50 

8 

6 

10 

120 

3  Meg. 

2 

1 

1 

4 

1-6L6G 

A 

55 

AC 

1-8" 

EE 

None 

No 

R15019 

R15107 

42.75 

123.50 

20 

6 

25 

130 

3  Meg. 

2 

2 

1 

6 

2-42 

ABi 

110 

AC 

2-12" 

EE 

Choice 

No 

R15050 

R15104 

58.20 

173.00 

30 

6 

35 

130 

3  Meg. 

2 

2 

1 

6 

2-6L6G 

AB2 

150 

AC 

2-12" 

EE 

Choice 

No 

R15100 

R15103 

66.30 

149.50 

30 

6 

35 

130 

3  Meg. 

3 

2 

1 

7 

2-6L6G 

AB2 

160 

AC 

2-12" 

EE 

Choice 

No 

R15130 

R15132 

88.75 

192.50 

40 

5 

50 

130 

3  Meg. 

3 

3 

2 

8 

2-6L6G 

AB2 

180 

AC 

2-12" 

EE 

Choice 

No 

R15110 

R15112 

111.25 

218.00 

60 

5 

70 

130 

3  Meg. 

5 

5 

2 

12 

2-6L6G 

AB2 

195 

AC 

2-12" 

EE 

Choice 

No 

R15120 

R15122 

160.00 

317.25 

90 

5 

100 

130 

3  Meg. 

5 

5 

2 

15 

4-6L6G 

AB2 

225 

AC 

4-12" 

PM 

Choice 

No 

R15054 

R15056 

110.00 

170.00 

30 

6 

35 

130 

3  Meg. 

2 

2 

1 

6 

2-6L6G 

AB2 

/  96 
\135 

6VDC    1 
110VAC/ 

2-12" 

PM 

C 

No 

R15059 

R15060 

175.00 

240.00 

30 

6 

35 

130 

3  Meg. 

2 

2 

1 

6 

2-6L6G 

AB2 

1108 
\150 

6VDC     i 
110VAC/ 

2-12" 

PM 

C 

Vis 

RCA  Mfg.,  Co.,  Inc. 

,  Front  &  Cooper  Sts. 

Camden,  N.  J.- 

-"RCA" 

M 1-4264 

PG-111 

$36.50 

$99.50 

6 

NS 

NS 

110 

}4  Meg. 

1 

1 

1 

3 

•  1-6L6 

A 

56 

AC 

1-6M" 

PM 

D 

No 

Ml-4274 

PG-112 

78.60 

199.50 

12 

6 

19 

95 

V2  Meg. 

2 

3 

2 

5 

2-6L6 

A 

110 

AC 

2-8M" 

PM 

V 

No 

M1^1264 

6-1 

36.50 

91.05 

6 

NS 

NS 

110 

M  Meg. 

1 

1 

1 

3 

1-6L6 

A 

56 

AC 

1-&X" 

PM 

D 

No 

Ml-4274 

12-1 

78.60 

168.85 

12 

6 

19 

95 

H  Meg. 

2 

3 

2 

5 

2-6L6 

A 

110 

AC 

2-&H" 

PM 

D 

No 

Ml-4274 

12-3 

78.60 

182.95 

12 

6 

19 

95 

H  Meg. 

2 

3 

2 

5 

2-6L6 

A 

110 

AC 

2-12  X' 

PM 

D 

No 

Ml -4284 

24-1 

133.50 

242.85 

24 

7 

30 

114 

NS 

4 

2 

2 

7 

2-6L6 

A 

145 

AC 

2-12JT 

PM 

D 

No 

Ml-4297/4288  50-1 

260.00 

429.00 

50 

5 

NS 

107 

NS 

2 

3 

2 

13 

4-6L6 

A 

260 

AC 

4-12K' 

PM 

D 

No 

Ml-4297/4288  50-3 

299.90 

1153.40 

50 

5 

NS 

107 

NS 

4 

5 

2 

19 

4-6L6 

A 

420 

AC 

4  Horns  EE 

V 

No 

Ml-4297/4288  200-1 

680.00 

1575.50 

200 

5 

NS 

107 

NS 

2 

3 

5 

37 

16-6L6 

A 

1040 

AC 

4  Horns  PM 

D 

No 

Sundt  Engineering  Co.,  4238  N 

.  Lincoln  Ave.,  Chicago,  11 

. — "Sunco" 

181 

180 

$33.50 

$67.50 

16 

5 

16 

126 

1  Meg. 

3 

3 

2 

6 

2 

A 

110 

AC 

1-12" 

PM 

C 

Yes 

Thordarson  Electric  Mfg.  Co., 

500  W.  Huroi 

,  Chicagc 

,  III  — 

"Thordarson" 

T-20W08 

$39.50 
79.50 
110.00 
140.00 
180.00 
160.00 
>f  America 

8 
15 
25 
40 
60 
10 
er  St., 

8                    113          .1  Meg. 
4.6                 116.5      .1  Meg. 
4.9                 119         .1  Meg. 
4.3                 119         .1  Meg. 
5                    118         .1  Meg. 
2.2                 110         .1  Meg. 
New  York,  N.  Y.— "Clarion" 

2 
2 
3 

4 
4 
3 

2 
2 
3 

4 
4 
2 

1 
1 
2 
2 
2 
1 

4 
6 
7 
9 
20 
9 

1-6L6 
2-6V6 
2-6L6 
2-6L6 
4-6L6 
2-2A3 

A 

AB 

AB 

AB 

AB 

A 

87 
95 
185 
265 
295 
140 

AC 
AC 
AC 
AC 
AC 
AC 





T-20W15 

T-20W25 

T-20W40 

T-20W60 

T-10W11 

Transformer  Corp. 

,  69  Woos 

C-7-R 

C-110 

$22.10+ 
23.60+ 

$71.82 

5 

7 

8 

119 

1  Meg. 

2 

1 

1 

4 

1-6N6G 

A 

49 

AC 

1-8" 

PM 

Choice 

No 

C-6-R 

C-107 

55.92 

5 

7 

8 

119 

1  Meg. 

2 

1 

1 

4 

1-6N6G 

A 

51 

AC 

1-8" 

PM 

Carb 

No 

C-12-R 

C-115 

32.00t 

108.74 

12 

8 

16 

114 

1  Meg. 

3 

2 

1 

5 

2-6V6 

A 

78 

AC 

2-10" 

PM 

Choice 

No 

C-22-R 

C-117 

42.00+ 

131.40 

24 

5H 

36 

127 

1  Meg. 

3 

2 

1 

7 

2-6L6 

ABt 

165 

AC 

2-12" 

EE 

Choice 

No 

C-26-R 

C-121 

58.00+ 

160.40 

30 

7 

41 

131 

1  Meg. 

4 

2 

1 

8 

2-6L6 

ABi 

174 

AC 

2-12" 

EE 

Choice 

No 

C-29-R 

C-123 

85.90+ 

189.40 

30 

8 

41 

132 

1  Meg. 

4 

2 

1 

9 

2-6L6 

ABi 

180 

AC 

2-12" 

EE 

Choice 

No 

C-38-R 

C-135 

79.00+ 

181.20 

40 

7J^ 

54 

130 

1  Meg. 

4 

2 

2 

10 

4-6L6 

ABi 

218 

AC 

2-12" 

EE 

Choice 

No 

C-39-R 

C-139 

120.20 

282.70 

70 

7 

99 

140 

1  Meg. 

4 

2 

2 

14 

4-6L6 

AB2 

292 

AC 

4-12" 

PM 

Choice 

No 

C-32-R 

C-161 

82.00 

168.00 

20 

8 

28 

129 

1  Meg. 

3 

2 

1 

9 

4-6V6 

A 

INS 
U60 

6VDC    \ 
110VAC/ 

2-12" 

PM 

C 

No 

C-34-R 

C-163 

184.00 

274.30 

30 

8.5 

41 

131 

1  Meg. 

2 

2 

1 

9 

4-79 

B 

/NS 
\185 

6VDC    1 
llOVAC/ 

2-12" 

PM 

C 

Yes 

tAvailable  as  portable  unit  with  case  for  change  in 

price. 

Turner  Co.,  909  17th  St.,  Cedar 

Rapids,  Iowa — "Turner" 

S22 
S22L 
S26 
mnii  Engii] 

$104.50            8 
109.50          12 
122.00          15 

3  University,  St. 

2.5      10 
3        18 
2.5     21 
Paul,  Minn. — " 

120 

120 

126 

U.S.E. 

5  Meg. 
5  Meg. 
5  Meg. 

2 
2 
2 

1 
1 
2 

1 
1 
1 

5 
5 

7 

42 

6L6 

6L6 

ABi 
ABi 
AB= 

100 
110 
110 

AC 
AC 
AC 

2-10" 
2-10" 
2-10" 

EE 
EE 
PM 

C 
C 
C 

NS 

NS 
NS 

United  S 

erring,  22C 

10C 

U10 

$38.00 

$62.00 

10 

10 

12 

115 

1  Meg. 

2 

2 

1 

5 

6A6 

B 

50 

AC 

2-8" 

PM 

NS 

No 

20C 

U20 

71.00 

110.00 

20 

5 

25 

122 

1  Meg. 

2 

2 

1 

8 

6L6 

AB 

90 

AC 

2-12" 

PM 

NS 

No 

20E 

UN20 

132.00 

195.00 

20 

5 

25 

122 

1  Meg. 

2 

2 

1 

8 

6L6 

AB 

90 

AC-DC 

2-12" 

PM 

NS 

Yes 

60C 

U60 

145.00 

264.00 

60 

4 

60 

135 

1  Meg. 

4 

5 

1 

12 

6L6 

AB 

320 

AC 

2-12" 

PM 

NS 

No 

Vibraloc  Mfg.  Co.,  3691  Mission 

St.,  San  Francisco,  Calif.- 

-"Vibraloc" 

F12 

F12-CS 

$30.00 

$75.00 

12 

6 

10 

132 

NS 

2 

1 

1 

4 

6L6 

AB 

50 

AC 

1-11" 

PM 

D 

No 

Vocagraph  Sound  Systems,  164  N.  May  St.,  Chicago,  111.- 

—"Vocagraph" 

30-12C 

30-12PX 

$29.50 

$79.00 

12 

6 

18 

120 

.5  Meg. 

2 

1 

1 

5 

2-42 

AB 

60 

AC 

1-NS 

PM 

Choice 

No 

30-20C 

30-20PX 

43.50 

118.00 

20 

6 

25 

130 

.5  Meg. 

3 

2 

1 

7 

2-6V6 

AB 

80 

AC 

2-NS 

PM 

Choice 

No 

30-30C 

30-30PX 

66.50 

165.00 

30 

5 

40 

135 

.5  Meg. 

3 

2 

2 

8 

2-6L6 

A 

100 

AC 

2-NS 

PM 

Choice 

No 

40-40C 

120.00 
150.00 

40 

60 

5 

Calif.- 

5         50 

5  75 

6  8 
-"Volutone" 

135 
135 

NS 

.5  Meg. 
.5  Meg. 
NS 

3 
5 

NS 

2 

4 

NS 

2 
2 
1 

7 
14 
4 

2-6L6 
4-6L6 
42 

AB 

A 

AB 

120 
150 
50 

AC 
AC 
AC 

1-NS 

PM 

Choice 
Choice 
NS 

No 
No 
No 

40-60C 

30-05SA 
■e  Co.,  226 

50.00 
s  Angeles, 

Volu-Toi 

NT.  Main,  Lc 

40 

40/101 

$55.00 

$84.50 

8 

3 

10 

100 

NS 

2 

1 

None 

4 

2-44 

A 

80 

AC 

1-8" 

EE 

V 

No 

45 

45/101 

65.00 

94.50 

10 

3 

15 

100 

NS 

2 

1 

None 

4 

2-6V6G 

A 

80 

AC 

1-10" 

EE 

V 

No 

60 

60/101 

93.00 

122.50 

10 

3 

15 

100 

NS 

4 

3 

None 

5 

2-42 

A 

90 

AC 

1-10" 

EE 

V 

No 

65      • 

65  /101 

118.00 

147.50 

20 

5 

25 

125 

NS 

4 

3 

None 

6 

2-42 

AB 

100 

AC 

2-10" 

EE 

V 

No 

5PP 

5PP/100 

78.00 

107.50 

10 

2 

15 

100 

NS 

3 

1 

None 

5 

2-42 

A 

90 

AC 

1-10" 

EE 

V 

No 

The  Webster  Co.,  5622  Bloomingdale  Ave 

,  Chicago,  111. — 

'Webster  Chicago" 

C8 

CL8 

$43.50 

$65.00 

8 

1H 

10 

65 

NS 

2 

2 

1 

3 

6L6 

AB 

68 

AC 

1-8" 

EE 

Carb 

No 

X8 

XL8 

49.00 

82.50 

8 

7 

10 

90 

2  Meg. 

2 

2 

1 

4 

6L6 

AB 

72 

AC 

1-8" 

EE 

C 

No 

714 

PV714 

54.00 

138.05 

14 

6.5 

20 

123 

2  Meg. 

2 

2 

1 

7 

2-6V6 

A 

87 

AC 

2-10" 

PM 

sv 

No 

2L18 

FV18 

64.00 

176.00 

18 

3.2 

28 

125 

2  Meg. 

2 

2 

1 

7 

2-6L6 

A 

110 

AC 

2-12" 

PM 

sv 

No 

2L25 

PD25 

75.00 

224.75 

25 

3 

35 

135.2 

2  Meg. 

2 

2 

1 

7 

2-6L6 

A 

125 

AC 

2-12" 

PM 

D 

No 

2A30 

CPX-A30 

126.50 

245.00 

30 

2.6 

40 

135 

2  Meg. 

2 

2 

2 

12 

4-2A3 

A 

210 

AC 

2-12" 

PM 

C 

No 

4P60 

CPX-4P60 

181.50 

369.50 

60 

3.2 

60 

143 

2  Meg. 

4 

5 

1 

12 

2-6L6 

AB2 

205 

AC 

4-12" 

PM 

C 

No 

530 

MP530 

169.00 

240.00 

30 

2.8 

45 

130 

2  Meg. 

1 

2 

1 

5 

2-6L6 

ABi 

150 

1115V  AC1 
\6VDC    / 
AC 

2-12" 

PM 

C 

Yes 

2L35 

DV35 

135.00 

245.50 

35 

3 

48 

133 

2  Meg. 

4 

4 

2 

14 

2-6L6 

AB' 

235 

2-12" 

PM 

D-V 

No 

BA7 

305.7 
Electric  Co 

70.00 
)eKoven, 

7 
Racine, 

Wise. — ' 

&\4       76         44M 
Webster  Electric  Co." 

1 

2 

0 

4 

6L6 

AB, 

68 

AC 

PM 

NS 

No 

Webster 

,  Clark  &  I 

10B5 
15-10 
16-20 
18-50 
19-50 
20-0 


5SN  NS  NS 

10TN  NS 

20TN  NS 

50TN  NS 

C19-50  NS 

NS 


NS 
NS 
NS 
NS 


5 
10 
20 
50 
50 


13 
35 
70 
70 


Wholesale  Radio  Service  Co., 


Preamplifier  and  Mixer 
100  Sixth  Ave.,  New  York,  N.  Y.- 


115 
120 
140 
139 

80 

85 
'Lafayette" 


1  Meg. 
1  Meg. 
1  Meg. 
1  Meg. 


Booster  Stage 
1  Meg.  5 


4 

5 

9 

12 

7 
7 


6F6 

2-6F6 

2-6L6 

4-6L6 

4-6L6 


53 
65 
125 
225 
210 
50 


AC 
AC 
AC 
AC 
AC 


1-8" 
2-8" 
2-12" 
2-12" 
NS 


PM 
PM 
PM 

NS 
NS 


C 

c 
c 
c 

NS 


345T 

$309.50 

194.50 

10 

.006 

30 

4 
1 
7U 

NS 
NS 
40 

159 
97 
130 

1  Meg. 
1  Meg. 
1  Meg. 

5 
10 
4 

6 
10 
2 

2 

NS 

11 

17 
8 

2-2A3 

NS 

2-6L6G 

A 

NS 

AB 

150 
130 
175 

AC 
AC 
AC 

Choice 
2-12" 

Choice 
Choice 

Choice 
Choice 
C-V 

No 
No 
No 

347T 

271A 

812T                  28.95 

$79.25+ 

272A 

814T                  43.50 

94.50f 

30 

BH 

40 

130 

1  Meg. 

4 

4 

9 

2-6L6G 

AB 

185 

AC 

2-12" 

Choice  C-V 

No 

334P 

817T                  94.95 

141.25 

30 

8 

40 

130 

1  Meg. 

3 

2 

9 

4-79 

B 

/138 
\185 

6VDC    \ 
llOVAC/ 

2-12" 

PM 

C 

Yes 

336P 

825T 

143.20 

30 

8 

40 

130 

4 

3 

11 

2-6L6G 

AB 

160 

AC 

2-12" 

EE 

C-V 

No 

283A 

844T                    41.95 

93.75t 

40 

8H 

55 

132 

1  Meg. 

4 

2 

2 

10 

4-6L6G 

AB 

220 

AC 

2-12" 

EE 

C-V 

No 

231A 

846T                   11.95 

25.50 

5 

7 

8 

120 

1  Meg. 

2 

1 

4 

1-6N6G 

A 

50 

AC 

1-8" 

PM 

Carb 

No 

230A 

848T                  10.95 

33.50+ 

5 

7 

8 

120 

1  Meg. 

2 

1 

4 

1-6N6G 

A 

50 

AC 

1-8" 

PM 

C-V 

No 

250A 

851T                   15.95 

54.50t 

12 

K 

15 

113 

1  Meg. 

3 

2 

5 

2-6V6G 

AB 

76 

AC 

2-10" 

PM 

C-V 

No 

261A 

864T                  20.70 

64.95f 

25 

5 

35 

128 

1  Meg. 

3 

2 

6 

2-6L6G 

AB 

170 

AC 

2-12" 

EE 

C-V 

No 

253A 

866T                  33.95 

79.95T 

20 

6J4 

30 

128 

1  Meg. 

3 

2 

6 

2-6L6G 

AB 

150 

AC-DC 

2-12" 

EE 

C-V 

No 

269A 

871T                 41.95 

88.25 

20 

5 

30 

130 

1  Meg. 

3 

2 

9 

4-6V6G 

A 

/168 
\165 
290 

6VDC 
llOVAC 

Horns  \ 
2-12"  J 
4-12" 

PM 

C 

No 

291A 

892T                  59.95 

143.50+ 

70 

7 

100 

139 

1  Meg 

4 

2 

14 

4-6L6G 

ABo 

AC 

PM 

C-V 

No 

297A 

898T                  95.50 

399.50 

125 

m 

180 

137 

1  Meg. 

5 

6 

NS 

20 

6-809 

B 

400 

AC 

8-12" 

PM 

2  C-V 

No 

297A 

899T                 95.50 

658.20 

125 

iy, 

180 

137 

1  Meg. 

5 

6 

NS 

20 

6-809 

B 

400 

AC 

/Hornsl 
14-10"/ 
2-11" 

PM 

2  C-V 

No 

258DF 

324T                  31.90 

57.52 

20 

6 

30 

128 

1  Meg. 

2 

1 

1 

6 

2-6L6G 

AB 

180 

AC 

EE 

NS 

No 

tAvailable  as  portable  equipment  at  a  slight  change  in 

price. 

Lafayette  sound  systems  are 

supplied  with  speaker  baffles. 

CODES — NS — Data  not  supplied.    EE- 

-Electrically  excited  field. 

•M — Permanent  magnet  field. 

C — Crystal. 

larb — Carbon.    D- 

—Dynamic. 

SC — Sound  cell 

.    SV— Static  Telocity. 

V— Velocity. 

NEW  THINGS 


Volume  range  expander 

*  Electronic  type  of  volume 
range  expander.  Adds  brilliancy  to 
record  reproduction  by  increasing 
the  loud  passages  and  softening  the 
low  passages.  Inserted  between 
pick-up  unit  and  amplifier.  Adds 
approximately  20  DB  to  amplifier 
gain  when  desired.  List  $65.  Am- 
plifier Co.  of  America,  43  W.  20th 
St.,  New  York,  N.  Y.—  Radio  Today. 


Hand  microphones 

*  Military  type  hand  micro- 
phones with  carbon  or  crystal  units. 
Mike  fits  into  palm  of  hand.  Spring- 
lever  type  switch  is  optional.  Anti- 
noise  close-talking  models  also 
available.  Finished  in  black  moroc- 
co grain  with  bright  polished  grille. 
List  $15  to  $31.50.  Shure  Bros., 
225  W.  Huron  St.,  Chicago,  111.— 
Radio  Today. 


Custom  carrying  cases 

*  Complete  line  of  carrying 
cases  for  speakers,  amplifiers,  pho- 
nographs, automatic  record  chang- 
ers, test  instruments,  speaker  baf- 
fle cases,  etc.  Made  of  heavy  ply- 
wood with  fabricoid  covering,  heavy- 
duty  carrying  handles  and  bumpers 
to  protect  corners.  Custom  Auto 
Trunk  Co.,  300  W.  19th  St.,  New 
York,  N.  Y. — Radio  Today. 


Infinite  baffle  mounting 

■*  Infinite  baffle  cabinet  for  im- 
proving bass  response  of  speaker 
unit.  High-frequency  deflector  baffle 
spreads  out  high  frequencies.  Sound 
Systems,  Inc.,  6545  Carnegie  Ave., 
Cleveland,  Ohio — Radio  Today. 

32-watt  amplifier 

+  Beam  power  amplifier  with 
32  watts  output — total  harmonic 
distortion  of  1  per  cent.  Gain  of 
75  DB.  Direct  input  to  grid  of  1st 
amplifier — 100,000     ohms.       Output 


impedance  of  500.  Model  37A. 
Seairland  Products  Co.,  20  E.  Jack- 
son Blvd.,  Chicago,  111. — Radio  To- 
day". 


Vibraloc  reproducer 

+  Sound  reproducer  designed  for 
all  purposes.  Acoustically  designed 
case  provides  better  tone  range  and 
fidelity.  Sound  waves  diffused  for 
better  coverage.  List  with  mount- 
ing fixture— $25.  Vibraloc  Mfg.  Co., 
3691  Mission  St.,  San  Francisco, 
Calif. — Radio  Today — see  also  advt. 
p.  47. 

Molanode  capacitors 

*  Electrolytic  capacitors  for  fil- 
tering and  by-passing.  Housed  in 
metal  containers  with  mounting 
lugs.  Units  may  be  insulated  by 
use  of  mounting  washer.  Bracket 
mounting  also  available.  Voltage 
ratings  from  25  to  450.  Capacitances 
from  5  to  50  mikes.  Magnavox  Co., 
Ft.  Wayne,  Ind. — Radio  Today. 


April,  1938 


45 


MICROPHONE    SPECIFICATIONS    compiled  by  Radio  Today 


Direc-  Freq.  Range 

Model  List  tional  Mount-  -f  or  — 

No. Price     Type    Chat.      ing       Cycles      DB 


Output 


Ohms 
imped. 


Cable 
Length 


Amperite  Co. — 561  Btoadway,  New  York,  N.  Y. 


RBHn 

RBMn 

RBHK 

RBMK 

RBBHn 

RBBn 

RSHn 

RBSn 

SR80Hn 

SR-80n 

RAH 

RAL 

S-l 

7JH 

7J 

HAM 

HAL 

HDH 

HDL 

KTH 

KTL 

SKH 

SKL 

ACH 

ACL 


$42.00t  Vel 

42.00t  Vel 

42.00t  Vel 

42.00t  Vel 

42.00f  Vel 

42.00f  Vel 

32.00t  Vel 

32.00t  Vel 

80.00t  Vel 

80.001  Vel 

22.00t  Vel 

22.00t  Vel 

15.00t  Sv 

22.00f  Vel 

22.00f  Vel 

22.00t  Vel 

22.00t  Vel 

22.00  Vel 
22.00 
22.00 
22.00 
12.00 
12.00 
25.00 
25.00 


B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

B-D 

Vel       B-D 

Mag    NS 

Mag    NS 

Mag    NS 

Mag    NS 

Vel       B-D 

Vel       B-D 


St 

St 

St 

St 

St 

St 

St 

St 

St 

St 

St 

St 

St 

Lpl 

Lpl 

Dk 

Dk 

Hd 

Hd 

NS 

NS 

NS 

NS 

St 

St 


40-11M  NS 

40-1 1M  NS 

40-11M  NS 

40-11M  NS 

40-1 1M  NS 

40-11M  NS 

60-8M  NS 

60-8M  NS 

40-15M  NS 

40-15M  NS 

60-7KM  NS 

60-7J4M  NS 

80-7M  NS 

60-7 V2tA  NS 

60-7MM  NS 

60-7 MM  NS 

60-7  YM  NS 

60-7J.£M  NS 

60-7HM  NS 

40-9M  NS 

40-9M  NS 

60-6M  NS 

60-6M  NS 

60-7KM  NS 

60-7J4M  NS 


-65 
-65 
-65 
-65 
-68 


-68 
-56 
-56 


-52 
-70 
-70 
-68 
-68 
-68 
-68 
-40 
-40 
-40 
-40 
-70 
-70 


tAvailable  in  chrome  finish  at  $1.00  extra. 

Brush  Development  Co.,  3311-25  Perkins  Ave.,  Cleveland,  Ohio 


2M 

200 

2M 

200 

2M 

200 

2M 

200 

2M 

200 

2M 

200 

Static 

2M 

200 

2M 

200 

2M 

200 

2M 

200 

2M 

200 

2M 

200 


B-l 

BR2S 

BL-1 

AR-43 

AR-26 

R-34 

BT-4 

R-22 


$26.50 
29.50 
30.00 


Cry      N-D 
Cry      N-D 


Cry 


75.00      Cry 
75.00      Cry 


75.00 
90.00 
65.00 


Cry 


N-D 
N-D 
N-D 
N-D 


4-Cry  N-D 
Cry      N-D 


St 

St 

Lpl 

St 

St 

St 

Floor 

St 


5000 
5000 
5000 
5000 
5000 


Flat 
Flat 
Flat 
Flat 
Flat 


10,000  Flat 
5000  Flat 
8000      Flat 


-66 
-66 
-72 
-60 
-66 

-66 
-70 


Carrier  Microphone  Co. — 525  So.  Commercial  St.,  Inglewood,  Calif. 


300-V 
618-D 
103-D 
105-D 
500-A 


NS 
NS 
NS 
NS 
NS 


Vel  B-D 
Dyn  U-D 
Dyn  N-D 
Dyn  U-D 
Cond  N-D 


Opt 

Opt 

St 

St 

St 


30-10M  NS 

40-10M  NS 

50-8M  NS 

50-8M  NS 

40-11M  NS 


-65 
-65 
-70 
-70 
-30 


Electro- Voice  Mfg.  Co.— 324  Colfax  Ave.,  South  Bend,  Ind. 


V-l 

V-2 

V-3 

V-4 

K-20 

K-21 

K-22 

50 

75 

100 

201 D 

L-6A 

L-6B 


$25.00  Vel 
35.00  Vel 
50.00 
75.00 
19.50 
24.50 
29.50 

5.00 

7.50 
10.00 
15.00 
25.00 
27.50 


Vel 
Vel 
Vel 
Vel 
Vel 


B-D 
B-D 
B-D 
B-D 
B-D 
B-D 
B-D 


St 
St 
St 
St 
St 
St 
St 
St 
St 
St 
Hd 
St 
St 


40-10M  NS 

40-10M  NS 

35-12M  NS 

30-12M  NS 
45-8M 
40-8M 
40-8M 

50-7.5M  NS 

40-7.5M  NS 

40-7.5M  NS 

60-5M  NS 

40-10M  NS 

40-10M  NS 


NS 
NS 
NS 


Carb  U-D 

Carb  U-D 

Carb  U-D 

Carb  U-D 

Dyn  U-D 

Dyn  U-D 

tlmpedances  of  50,  200,  500  ohms  or  direct-to-grid. 
RCA  Mfg.  Co.  Inc.,— Front  &  Cooper  Sts.,  Camden,  N.  J. 

Ml-4040       $190.00     Vel  U-D       Sw       100-5M      NS 

M1-4026A      132.20     Vel  B-D 

M1-4000-AF    77.75     Vel  N-D 

M1-4030-D     100.00      Dyn  N-D 

Ml-4036  43.50     Vel  N-D 


Sw  30-15M  NS 

Pipe  70-6M  NS 

Sw  60-10M  NS 

B  &  S  70-9M  NS 


-67 
-66 
-64 
-68 
-66 
-64 
-45 
-45 
-45 
-42 
-58 
-58 


-69 
-61 
-63 
-67 
-63 


50-250 
50-250 
50-250 
50-250 
50-250-15,000 


25 
25 
25 
25 
25 
25 
12 

8 
25 
25 
12 

8 
12 
25 
25 
12 

8 
12 
12 
25 
25 
20 
20 
25 
25 


.005  Mfd 

NS 

.005  Mfd 

NS 

.01  Mfd 

15 

.005  Mfd 

NS 

.02  Mfd 

NS 

0035  Mfd 

NS 

.01  Mfd 

15 

.003  Mfd 

NS 

50-200-2000 

20 

30-300-2000 

None 

30-300-2000 

20 

30-200-2000 

20 

200 

None 

tOptional 

8 

tOptional 

20 

tOptional 

20 

tOptional 

20 

tOptional 

8 

tOptional 

8 

tOptional 

8 

200 

None 

200 

6 

200 

6 

200 

6 

tOptional 

20 

tOptional 

20 

30 

None 

None 

30 

30 


Direc-  Freq.  Range 

tional  Mount- 


Output 


Model  List  tional  Mount-  +  or  ■ 

No. Price     Type    Char.      ing       Cycles      DB        DB 


Ohms 
imped. 


M1-4001-B         44.35    Vel       N-D 

M1-6225-A         11.50  Carb    N-D 

Ml-6226  26.50   Dyn     N-D 

Ml-6228  29.95   Dyn     N-D 

Radio  Receptor  Co.  Inc. — 251  West  19th,  New  York,  N.  Y. 

7A                     $60.00   Dyn     U-D       St  50-9M       NS      -69 

7B                       45.00   Dyn     U-D       St  100-5M       NS      -61 

7C                       29.00   Dyn     U-D       St  100-5M       NS      -69 

Seairland  Products  Co. — 20  E.  Jackson  Blvd.,  Chicago,  111. 

S-8                      NS       Dyn     U-D       St  50-9M       NS      -59 

A-9                     NS       Dyn     U-D       St  100-5M 

L-10                    NS       Dyn     U-D       St  100-5M 

Shure  Bros— 225  W.  Huron  St.,  Chicago,  III. 


Lpl        80-7M  NS 

Dk         50-6.5M  NS 

Pipe  100-8M  NS 

Pipe  100-8M  NS 


NS 
NS 


-80 
-63 
-68 
-68 


700A 
701A 
702A 
703S 

720A 

750A 

760A 

70H 

70S 

76A 

85A 

3B 

5B 

10B 


$25.00  Cry 

25.00  Cry 

25.00  Cry 

27.50  Cry 

39.50  Cry 


25.00  Cry 

30.00  Cry 

22.50  Cry 

25.00  Cry 

25.00  Cry 

45.00  Sc 

5.50  Carb    S-D 

10.00  Carb    S-D 

10.00  Carb    S-D 


S-D 
S-D 
N-D 
S-D 
(N-D 
I  U-D 
(B-D 
U-D 
U-D 
S-D 
S-D 
S-D 
N-D 


Sw 
St 
St 
Dk 


Hd 

Hd 

NS 

Dk 

Lpl 

St 

St 

St 

Hd 


30-10M 
30-10M 
30-10M 

NS 
30-10M 
30-10M 
40-10M 
30-10M 

NS 
30-10M 

NS 

NS 
30-10M 
30-5M 
30-7M 
30-5M 


-52# 
-52# 
-52# 
-46# 
-54#1 
-69#r 
-74#] 


7H    -4 

-4U# 
lYi  -44# 
-44# 
-52# 
3  -68# 
10  -42# 
10  -42# 
10     -42# 


250 

250 

250 

40,000 

30 
30 

30 

30 
30 
30 

5  Megt 
5  Megt 
5  Megt 
MMegt 

5  Megt 

5  Megt 
5  Megt 
5  Megt 
HMegt 
5  Megt 
5  Megt 
200  ohms 
200  ohmst 
200  ohmst 


tlmpedance  is  value  of  terminal  resistance  to  be  used. 

jKDpen  circuit  level  is  given  in  DB  below  1  volt  per  dyne  per  sq.  centimeter. 

Transducer  Corp.— 30  Rockefeller  Plaza,  New  York,  N.  Y. 


MK20 

TR5 

MK30 

MK35 

TR6 

MK40 

MK60 

MK90 


$19.50   Dyn  U-D       St 

27.50   Dyn  U-D       St 

27.50    Dyn  U-D       St 

34.50   Dyn  Adjust  St 

39.50  Dyn  U-D       St 

39.50   Dyn  Adjust  St 

59.50   Dyn  Adjust  St 

90.00   Dyn  Adjust  St 


The  Turner  Co. — Cedar  Rapids,  Iowa 


30-30 

30-BT 

77 

2X 

83-B 

VT-73 

T-9 

DB-50 

38 

24 

24-G 

31 

24-B4 


$22.50  Cry 

24.00  Cry 

29.50  Cry 

50.00  Cry 

25.00  Cry 

25.25  Cry 

19.50  Cry 

22.50  Cry 

22.50  Cry 

22.50  Cry 

22.50  Cry 

22.50  Cry 

25.50  Cry 


NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 
NS 


St 

St 

St 

St 

Lpl 

St 

St 

St 

St 

St 

St 

Hd 
St 


90-9M 
150-8M 
30-10M 
25-10M 
100-8M 
25-10M 
25-12M 
25-12M 

30-8M 
30-8M 
30-10M 
30-12M 

100-8M 

100-6M 
50-6M 
50-7M 
40-7M 
50-6M 

100-6M 
30-10M 

100-6M 
40-10M 


-55 
-45 
-55 
-52 
-40 
-50 
-45 
-45 


4  -52 

4  -52 

3  -54 

1H  -65 

7  -60 


-50 
-53 
-50 
-56 
-50 
-49 
-60 
-49 
-60 


32.50   Dyn     NS 
*Suction  Cup. 

Western  Electric  Co. — 195  Broadway,  New  York,  N.  Y. 
630A  NS       Dyn     N-D       t  35-10M  Flat      -89* 

633A  NS       Dyn     S-D        t  35-10M   Flat      -89* 

618A  NS       Dyn     S-D       t  35-10M  Flat      -82* 

6O0A  NS       Carb    S-D       t  35-10M       7       -44* 

tFloor,  desk,  hand  or  suspension.     *Open  circuit  below  1  volt  per  bar. 


200-50,000 
200-50,000 
200-50,000 
200-50.000 
200-50,000 
200-50.030 

Any 

Any 

500,000] 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 

500,000 


20 
20 
28 
200 


30 

None 

6 

30 


25 


7 

7 

7 

7 

25 

7 

None 

None 


None 
25 
25 
25 
25 
25 
25 
25 


rs 

20 


NS 
NS 

NS 
NS 


CODES: 


NS — Information  not  supplied. 
S-  D — Semi-directional. 


Carb — Carbon.     Cry — Crystal.      Dyn — Dynamic.     Sv — Static  velocity.     Vel — Velocity.     B-D — Bi-directional.     N-D — Non-directional. 
U-D— Uni-directional.       B&S— Ball  &  socket.      Dk— Desk.      Hd— Hand.      Lpl— Lapel.     St— Stand.     SW— Swivel. 


AMPLIFIER  RATINGS 

(From  page  38) 

Most  distortion  curves  are  run  at  400 
cycles  and  at  this  frequency  the  only 
distortion  encountered  is  that  associ- 
ated with  the  non-linear  characteristics 
of  the  tubes.  There  are  several  other 
sources  of  distortion  which  show  up 
at  other  frequencies,  the  most  serious 
of  which  is  the  low  frequency  distor- 
tion which  may  be  introduced  by  a 
poorly  designed  output  transformer. 
This  distortion  is  due  to  the  non-sinus- 
oidal magnetizing  current  of  the  out- 
put transformer  which  causes  a  dis- 
torted voltage  to  appear  across  the 
primary. 

The  condition  is  further  aggravated 
by  the  use  of  high  plate  resistance 
tubes,  and  it  is  not  uncommon  to  find 
beam  power  amplifiers  which  have  an 
undistorted  low  frequency  output  of 
only  20  per  cent  of  the  normal  rating. 
This  low  frequency  distortion  is  par- 


ticularly objectionable  since  all  har- 
monics fall  in  the  audible  range.  This 
type  of  distortion  may  be  reduced  by 
the  addition  of  inverse  feedback,  and 
by  the  use  of  an  output  transformer 
which  has  adequate  primary  induc- 
tance. Fig.  2  shows  the  distortion 
curve  of  a  typical  high-quality  ampli- 
fier from  40  to  7500  cycles;  this  curve 
was  run  at  rated  output  of  25  watts. 

Frequency  response  whenever  men- 
tioned is  usually  stated  quite  specific- 
ally. However,  on  checking  the  re- 
sponse curve,  the  scale  should  be 
noted  since  the  response  of  a  poor 
amplifier  may  look  unusually  good  if 
a  large  scale  is  used.  The  frequency 
response  of  some  amplifiers  is  capable 
of  variation  at  will,  providing  low  or 
high  compensation.  Fig.  3  shows  the 
response  curves  possible  with  a  well- 
known  make  of  amplifier. 

The  db  which  is  used  in  the  meas- 
urement of  gain  is  often  a  rather  un- 
satisfactory unit,  since  the  db  is  pri- 
marily a  power  ratio  and  the  gain  of 


an  amplifier  may  be  varied  several  db 
by  changing  the  input  impedence 
(load).  In  some  instances  manufac- 
turers use  an  input  impedance  equal 
to  the  value  of  resistor  across  the  in- 
put circuit.  Since  5  megohms  is  the 
most  commonly  used  resistor,  gain 
measurements  based  on  this  value  will 
be  unusually  high.  An  input  impe- 
dance of  100,000  ohms  seems  to  be  the 
most  commonly  used  value,  although 
any  input  impedance  may  be  used  pro- 
vided that  the  value  is  specified. 

The  tube  complement  will  usually 
give  an  indication  of  the  input  im- 
pedance used  in  computing  the  gain. 
In  comparing  gain,  reference  should 
be  made  to  the  same  input  impedance 
If  an  amplifier  has  a  certain  gain  when 
referred  to  a  100,000  ohm  input  im- 
pedance, the  gain  will  be  increased  by 
10  x  log  of  5.000.00Q  or  11  db  if  the  gain 

100,000 

is  computed  from  a  5  megohm  input. 
In  the  specifications  listed  on  pages 
42-44,  the  input  resistance  used  for 
measuring  the  gain  has  been  specified. 


46 


Radio  Today 


MAGIC  PHOXE 


The    Intercommunicator 
that  PERFORMS  and  SELLS! 


Model  SP2  (illustrated)  provides  dependable 
two-  way  communication  between  master  and 
remote  station,  with  variable  Vol.  Control  and 
excellent  tone.  No  tricky  controls.  No  unproved 
features.  Sold  to  the  trade  at  a  sensible  list 
price.  1  Master  and  1  Remote  sta-  (*ACA 
tion  with  50  ft.  of  cable.  Uses  6%"  ^T/"/3U 
P.M.   SPEAKERS    List  Price      «*l 

Model  SP2-P,  same  as  Model  SP2,  but  has  pri- 
vacy control  on  remote  station.  Features:  Pri- 
vacy at  remote  station  and  eliminates  Cf%  M  CA 
background  noises  at  master  sta-  t/A*'' 
tion     List  Price      *J  * 

ACT  NOW 

Send  In  for  illustrated  folder.  Active 
Jobbers  and  Sales  Agencies  write  in  for 
protected  territories.  Systems  to  meet 
any  requirement. 

Manufactured  by 
Comun-A-Phone  Systems,  Inc. 

1175    Broad    St.     -     -     -     Newark.    N.   J. 


TRANSDUCER 

leads  again  with 

A  NEW  DYNAMIC 
BALL  SHAPE  MIKE 

Transducer  pioneered  the  streamlined 
dynamic  microphone  field  with  the  fa- 
mous *Bullet*  models.  Now,  added  to 
this  great  line  of  quality  leaders  is  the 
new  Ball  Shape  'Bullet*  dynamic,  model 
3IK35.  The  same  care  in  design  and 
manufacture  which  has  put  Transducer 
'Bullets'  out  front  have  been  applied 
to  the  new  Ball  type.  See  it!  Hear  it! 
Put  it  through  its  paces!  Free  catalog 
of  the  entire  'Bullet'  line  on  request. 
Write.  .  .  .  New  Decibel  Matching  Chart 
suitable  for  framing  given  to  every 
purchaser  of  Transducer  'Bullet'  Micro- 
phones! 


Model  MK  35     |       |     * |™*d  A<"» 
$19.50  to  $90. 

'BULLET*  MICROPHONES 

Made  only  by 

TRANSDUCER  CORPORATION 

30  Roehtfelkr  Plaia.  New  York.  N.  Y. 


Pioneer  dynamotors 

•  Complete  line  of  dynamotors 
for  providing  a  high  DC  voltage 
from  low  voltage  batteries.  Units 
for  sound  systems,  police  radios,  air- 
craft, and  broadcast  purposes.  Pin- 
cor  Silver  Band  units  have  high  ef- 
ficiency, low  commutator  ripple  and 
excellent  regulation.  Pioneer  Gen- 
e-Motor Corp.,  466  W.  Superior  St., 
Chicago,  111. — Radio  Today. 


Precision  multi-meter 

•  Multi-range  AC-DC  meter  unit 
designed  for  wall  or  rack  mounting. 
Has  remote  control  range  selector 
unit  for  easy  use.  Selector  unit  fits 
in  recess  on  wall  unit  when  not  in 
use.  Six-foot  cable  connects  selector 
unit  and  meter.  Unit  has  a  9-inch 
meter.  AC-DC  voltage  ranges  0/10/- 
50/150/500/1,500  volts  at  1,000  ohms 
per  volt.  DC  current  range  0/1/10/- 
50/150/500  mils/10  amps.  Ohmmeter 
with  4  scales — center  reading  of  20/- 
800/8M/80M  ohms.  Five  decibel 
ranges  — 10  to  59  DB.  Precision 
Apparatus  Corp.,  821  E.  New  York 
Ave.,  Brooklyn,  N.  Y. — Radio  Today. 


"ALWAYS    FIRST 
WITH   THE    LATEST1' 

In  Response  to  Numerous  Re- 
quests We  Announce  the  TSetc 
Medium  Potcered 
BOGEN    MODEL     C  X 18 

DE-LUXE    AMPLIFIER  — IS    WATTS 


FEATURING 

THE     EXCLUSIVE     ELECTRONIC    TONE 

CORRECTOR    (not  a  compensator) 

The  superiority  of  this  new  tone  circuit  is 
so  great  that  many  sound  engineers  of 
radio  broadcast  stations  and  nationally 
known  industrial  organizations,  specified 
and  purchased  the  larger  model  CX30 
amplifier  in  order  to  obtain  the  ELEC- 
TRONIC TONE  CORRECTION  feature 
even  though  they  only  required  10  or  15 
watts  of  power  for  a  particular  instal- 
lation. 

Now,  with  the  CX1S,  you  can  feature  this 
new  and  outstanding  development  in  all 
your  smaller  P. A.  installations. 

Ask  your  local  Distributor  for  a  demonstra- 
tion.   Descriptive    literature    upon    request. 

DAVID   BOGEN   CO..   INC. 
663  Broadway,  New  York,  N.Y. 


'PIONEERS  IN 
PUBLIC  ADDRESS 
DEVELOPMENT 


UNIVERSAL    RECORDERS 


•  Complete  line  of  wax  and 
instantaneous  recording  ma- 
chines, professional  model 
(as  illustrated),  school  and 
college  model,  aluminum  re- 
corder and  a  portable  model. 
Blank  discs,  needles,  stylil 
and  accessories. 


Recording 
Division 


Universal  Microphone  Co.,  Ltd. 


424  WARREN  LANE 
INGLEWOOD,  CALIF- 


April,  1938 


47 


VOCAGRAPH    «   « 

LOWER  PRICES 

ma\e  Sound 
easy  to  sell! 


Don't  let  sales  slip  through  your 
fingers.  VOCAGRAPH  low 
prices  and  money-back  guarantee 
of  performance  will  close  the  deal 
every  time.  Compare  these  values 
and  ask  your  distributor  or  write 
the  factory  for  engineering  data 
on  the  complete  line. 

TWELVE  WATTS— $17.70 

Push-pull  '42  output.  High  gain 
for  use  with  velocity  or  crystal 
mike.  Full-range  tone  control. 
Output  impedance  4  and  8  ohms. 
For  use  with  P.M.  speakers.  Com- 
plete, fully  portable  with  crystal 
microphone,  speaker,  and  carry- 
ing case,  only  $47.40. 

TWENTY  WATTS-$26.10 

Three  channel  input.  High  gain 
for  crystal,  velocity,  etc.,  mikes. 
Push-pull  beam  power  output. 
Impedance  selector  for  2,  4,  8,  166, 
250  and  500-ohm  output.  Fully 
portable  with  crystal  microphone, 
dual  speakers,  and  carrying  case, 
only  $70.80. 

THIRTY  WATTS— $39.90 

Three  channel  input.  Beam  power 
push-pull  output.  Variable  im- 
pedance selector.  Extreme  fidelity 
with  Colortone  frequency  com- 
pensator. 135  Db  gain.  Fully 
portable  with  dual  speakers,  fold- 
ing floor  stand,  carrying  case,  etc., 
only  $99.00. 

FREE — Sound   Rental  Sign 


ocagraph  Sound  Systems 


VOCAGRAPH  SOUND  SYSTEMS  | 

162-C  N.  MAY  ST..  CHICAGO,  ILL.  | 
Free  from  your  distributor,  a  I 
large  sign  advertising  your  I 
"Sound  Rental  Service."  See  I 
him  for  this  business  builder  or  | 
enclose    10c  with  this   coupon.  | 


HOW  TO  SELL  "SOUND" 

{From  page  34) 

pieuics.  In  selling  these  installa- 
tions emphasize  that  any  announce- 
ment can  be  directed  to  the  entire 
area  with  ease,  and  also  the  favorite 
radio  programs  can  be  reproduced 
through  the  loud  speakers.  It  is  a 
simple  matter  to  take  a  lead  from  any 
radio  transformer  and  plug  into  the 
phonograph,  or  if  this  is  not  feasible 
to  place  a  microphone  in  front  of  the 
radio  speaker. 

A  strong  selling  point  besides  the 
above  on  Saturday  and  Sunday  af- 
fairs, is  that  ball  games  can  be  aired, 
or  if  this  is  not  desirable  or  possible, 
owing  to  the  games  not  being  broad- 
cast on  these  days,  ball  scores  can  be 
announced  by  innings. 

Sell  "announcements" 

Pointing  out  how  easy  it  is  to  locate 
someone,  find  the  parents  of  a  wander- 
ing lass,  and  provide  continuous  mu- 
sical entertainment  by  means  of  re- 
cordings or  the  radio  or  both,  gives 
you  an  inside  edge  into  these  func- 
tions. 

You  can  also  show  that  the  cost  of 
the  rental  of  the  system  can  be  met 
and  bettered  by  mentioning  merch- 
ants'   names     over    the     system     at 


Robert    Barr    will    sales-manage    the 
Vocagraph     sound    division    of    Elec- 
tronic Design  Corp. 

thirty-minute  intervals  as  sponsoring 
this  service.  This  may  sound  diffi- 
cult but  it  was  done  last  year  in 
many   cities. 

And  don't  forget  the  high  schools 
— baseball  and  track.  Everyone  likes 
to  know  what  is  going  on — a  sound 
rental  will  bring  earnings  besides 
giving  yourself  some  nice  publicity. 
Wherever  people  congregate  sound 
equipment  is  needed.  At  the  theatre 
for  the  hard  of  hearing;  outside  the 
ticket  window  for  announcements 
and  in  bowling  alleys  for  their  tourn- 
aments now  going  on. 


"TOKFONE"—  The  1938  Sensation! 


PEP  •  PUNCH  •  PRICE 


w 


TOKFONE" 


JUNIOR 


Consisting  of  Master, 
Remote  Station  and 
50  ft.  of  wire. 


TOKFONE,  Jr. 
Remote  Station 


10 


75 


TOKFONE,  Jr. 
Master  Station 


The  Biggest  Buy  in 
Communication  Systems 

NOTHING    CAN    TOUCH    IT! 

GET  YOUR  SHARE! 

..CRASH   THIS   FERTILE   MARKET! 

If  you're  in  a  position  to  "CASH-IN"  with  FAST  MOVING- 
LOW  PRICED  intercommunication  systems  then  you  owe  it 
to  yourself  to  get  in  touch  with  REGAL  —  NOW ! 

•  Note    These    Facts!  • 

OTHER  TOKFONE  SYSTEMS— adaptable  to  meet  all  requirements— from  2  to  40  stations— beautifully  hand- 
rubbed  cabinets— NO  PREFERENCES— NO  TRICKS— No  Makeshifts— All  New  Merchandise— Special 
Units  if  Necessary — Manufactured   in  our  own  factory.  


We  also  Manufacture  P.A.   Equipment  in  the  following  sizes:  6,  12,  15,  30,  60  Watt — Amplifiers — Parts 
used   are:   Aerovox-Thordarson— I.R.C.— Parmet-Rola — Clarostat-Eby  and    Holyoke — Nothing   but   the   best. 

SEND   FOR   CATALOG   SHOWING    COMPLETE   LINE! 
REGAL    AMPLIFIER   MANUFACTURING   CORP. 

I  l     14  WEST  17th  STREET  c.?£u  addreJ?  NEW  YORK  CITY 


Cable   address 
"Ramcoamp" 


48 


Radio  Today 


Centered  between  the  two  workmen  at  lower  left  is  an  inter-phone  doing  a  job 


'PHONES  IN  CONSTRUCTION 
WORK 

*  A  live-wire  radio  firm  in 
Florida  has  discovered  that  intercom- 
munication systems  are  needed  on 
construction  jobs,  and  has  had  good 
success  with  installations  made  for 
local  builders.  Flagler  Radio  Co., 
Inc.,  Miami,  started  out  on  this  work 
when  a  huge  electric  display  sign  was 
being  built  for  National  Distillers. 

The  size  of  the  sign,  which  is  illus- 
trated herewith,  and  the  extremely 
complicated  nature  of  its  structure, 
made  it  necessary  for  workmen  to 
keep  in  touch  with  each  other.  Con- 
stant communication  made  the  work 
safer  and  faster,  according  to  presi- 
dent E.  H.  Lehfeldt,  of  Flagler 
Radio. 

"As  connections  were  made  to  the 
flasher  they  were  checked  with  the 
men  working  on  the  face  of  the  sign," 
reports  Mr.  Lehfeldt,  "and  the  use  of 


an  IC  system  became  invaluable  as  a 
time  saver." 

Flagler's  later  went  to  work  at  the 
construction  site  of  the  new  DuPont 
building  in  Miami.  "This  building 
is  18  stories  high.  In  the  superin- 
tendent's office  we  installed  a  master 
station,  and  every  third  floor,  a 
speaker.  This  was  necessarily  a  high 
power  job,  to  cover  three  stories  at 
this  high  noise  level,  but  it  works 
perfectly  and  saves  a  tremendous 
amount  of  'running  around'  looking 
for  men." 

"Tokfone"  systems,  made  by  Regal 
Amplifier  Mfg.  Corp.,  New  York 
City,  are  being  used  by  Flagler. 

*  A  detailed  and  illustrated  de- 
scription of  an  inexpensive  central- 
ized school  sound  system  is  pre- 
sented in  a  new  bulletin  prepared 
by  Wright-DeCoster,  Inc.,  St.  Paul, 
Minn.  Suggestions  on  proper  in- 
stallation of  all  types  of  school  sys- 
tems are  included  in  this  release. 
No.  A  18;  the  bulletin  and  diagram 
will  be  sent  free. 


D7T 
High  Imp. 


$22^0  $2200 


The  NEW  ''CLIPPER"  DYNAMIC 

Another  American  Moving-Coil  Microphone,  Featuring 
HIGH  OUTPUT— SMALL  SIZE 

RUGGEDNESS— FIDELITY 

TRIM— EFFICIENT  DESIGN 

LONG  LIFE— STABILITY 


:iplete  with  12  V2'  R/J  cable  and 
27  Connector.  Over-all  height. 


D7  and  D7T  Microphones  come 
flmphenol  plug.  Chrome  finish 
2y2".  Diameter,   1  >/z".  Net  Weight,  8'/z  ounces. 

Request  Catalog  No.  27  for  Complete  Details 


AMERICAN  MICROPHONE  CO.,  Inc. 

LOS   ANGELES,    CALIF. 


HEN  you  buy  LAFAYETTE  P.  A., 
you  can  forget  the  technicalities. 
Lafayette  systems  are  co-ordi- 
nated at  the  factory,  which  means 
you  get  a  complete  P.  A.  system, 
modern,  smoothly  styled  and  ready 
for  operation.  There  are  no  "extras" 
to  pay  for.  Every  Lafayette  system 
comes  complete  down  to  the  last 
plug  and  baffle.  No  headaches 
when  it  comes  to  paying,  either  1 
The  Lafayette  quoted  price  is  the 
final  price. 


A  SYSTEM 

FOR 

EVERY 

PURPOSE 


In  our  new  Spring 
Catalog  you  will  find  page 
on  page  of  P.  A.  systems  —  the 
finest  ever  built.  Amazing  values  from  the 
smallest  indoor  to  giant  super-power  instal- 
lations. Remember,  there's  a  Lafayette 
Sound  System  for  every  purpose  and 
they're  all  priced  right/ 


MAI  I  THtS 

COUPON  MOM  I 


WHOLESALE  AUDIO  SERVICE  £ 

NEWYORK.N.Y.  .  CHICAGO, ILL.  .  ATLANTA,  GA. 


100  SIXTH  AVENUE,  NEW  YORK,  N.  Y. 
I  RUSH  FREE  CATALOG  No.  71-97  08 


April,  1938 


49 


COMMUNI  CALL 


$2500 


This  2-wny  loml  speaking- 
system  enables  you  to  sell 
GENUINE  PACKAGED 
intercommunication. 

■  Comes    complete — nothing    else   to    buy. 

■  No   critical   adjustments  to   make. 

■  Operates  on  either  AC  or  DC  current. 

■  50  feet  of  underwriters'  cable. 

■  All  foreign  and  line  noises  eliminated. 

■  Latest   circuit   and    RCA   licensed   tubes. 
I  Simple,    efficient   and   economical. 

■  "Talk-back"  without  switch  on  outlying  stations. 

■  Clear,  distinct  reproduction  of  normal  speak- 
ing  voice. 

■  Beautiful    cabinets,    hand-rubbed     piano    finish. 

■  Master  stations  equipped  with  volume  control, 
pilot   light  and   talk-listen  switch. 

■  Wide  market — adaptable  to  needs  of  homes,  of- 
fices, factories,  restaurants — wherever  instant 
communication  is  needed  with  individuals  or 
groups. 

B  Also  available — a  6-station  selective  system, 
interconnected  by  plugs  without  installation  ex- 
pense,  wire  splicing,   etc. 

We  have  a  PROFITABLE.  WORK- 
ABLE proposition  for  jobbers  and 
dealers.    Wire  or  write  today. 

CHICAGO   SOUND   SYSTEMS  CO. 

160  E.  ILLINOIS  ST.  CHICAGO,  ILL. 

ESTABLISHED    1930 


10 


ATLAS 

"STORM 
PROOF" 

MARINE 
HORN 

29 

(Dealers  Net) 

If  you  are   Selling  Sound  .  .  . 

Don't  overlook  the  new  Atlas 
100%  "Storm  -  Proof"  Marine 
Horn  for  cone  speakers.  This  horn 
opens  a  »iew  market  for  you  in 
installations  where  weather  condi- 
tions are  the  big  problem.  The 
new  revolutionary  method  of  in- 
verted speaker  mounting  offers 
positive  protection  against  mechan- 
ical damage  to  the  cone  speaker. 
A  sturdy  cast  mounting  bracket  is 
available  for  sound  truck  or  sur- 
face mounting.  Floor  stand  avail-  r, 
able  for  portable  applications,  snowing^  radical 
new  principle  in 
~  exponential  baffle 
design,  with  protected  speaker  cone  and  acoustical 
treatment   to    absorb   back   pressure. 

WX-8   Horn  only  for  8"   speakers.  List   $17.50 
WX-12  Horn  only  for  12"  speakers.  List   $30.00 

Write  for  New  Catalog! 

New    1938   Spring    &   Summer    Catalog    F-3S  brings    you 

the    newest     P.    A.    developments.      Baffles,  Enclosures, 

Microphone  Stands,    P.    M.    Units,   and   other  accessories. 
Send  for  this   helpful   catalog  now. 

ATLAS  SOUND 

CORPORATION 

1453  39th  STREET,  BROOKLYN,  N.  Y. 


"SOUND"  SHORTS 


*  As  a  part  of  general  com- 
pany expansion,  John  Meek,  Elec- 
tronic Design  Corp.  president,  has 
announced  the  appointment  of  Rob- 
ert Barr  as  sales  manager  of  their 
Vocagraph  sound  systems  division. 
The  John  Meek-Bob  Barr  team  first 
worked  together  when  both  were 
executives  in  the  Clough-Brengle 
Co.,  some  time  ago. 

Vocagraph  has  also  doubled  its 
production  facilities  in  order  to 
keep  up  with  jobber  requirements 
on  the  1938  "Hushed  Power"  sound 
line.  Further,  two  new  field  repre- 
sentatives have  been  appointed: 
Henry  P.  Segal,  Gardner,  Mass.,  to 
cover  the  New  England  states,  and 
James  Vaivter,  Buffalo,  N.  Y.,  to 
cover  New  York  state. 

+  Communicating  Systems,  Inc., 
130  W.  56th  St.,  New  York  City, 
have  announced  that  the  company 
will  start  selling  home  television 
receivers  as  soon  as  program  ser- 
vice is  available  from  broadcasters. 
These  will  sell  as  low  as  $125  for 
3-in.  picture  size;  cathode  ray  type 
systems  will  be  used  in  a  design 
worked  out  by  chief  engineer  Lewis 
W.   Parker. 

*  Universal  Camera  Corp.  has 
developed  some  new  high  speed  au- 
tomatic processing  machinery  for 
its  movie  film,  and  is  therefore  an- 
nouncing a  price  reduction  in  proc- 
essing charges  to  the  consumer. 
Univex  says  that  "the  new  arrange- 
ment has  several  important  ad- 
vantages, because  with  a  portion  of 
the  processing  charge  included  in 
the  retail  price  of  the  film,  both  the 
dealer  and  distributor  are  able  to 
increase  their  volume  and  profits." 


MICROPHONE  MERCHANDISER 


+  A  display  piece  which  takes 
up  a  minimum  of  counter  space 
and  yet  presents  a  variety  of  mic- 
rophone styles  has  been  prepared 
for  distributors  by  Transducer 
Corp.,  30  Rockefeller  Plaza,  New 
York  City.  It  consists  of  a  metal 
base  finished  in  black  crackle, 
fitted  with  chrome  stand-rods  to 
which  actual  mikes  are  attached. 
Sales  copy  says  simply,  "Bullet  Mic- 
rophones Streamlined  for  Sound 
Reasons."  Shipped  with  the  mer- 
chandiser are  four  Bullet  dynamic 
models,  including  a  new  spherical 
style. 


REPLHCEmEIlT 


made      . 
AMAZINGLY 
SIMPLE 

•  Servicemen,  with.only  4  stand- 
ard types  of  Amperite  AC-DC 
Regulators  you  can  replace 
90%  (over  100  types)  of  AC- 
DC  Ballast  Tubes  now  in  use! 

Consult  your  jobber./ 

•  Amperite  Regulators  are 
equipped  with  a  patented 
Automatic  Starting  Resistor  to 
prevent  untimely  burnouts  and 

save  pilot  lights. 

•  New  Low  Price  on  Amperite 
AC-DC  Regulators:  $  1 .00  LIST 

■■Amperite     Replacements 

"■•  ,for:2V  Battery  Set  ballasts 

i-     $  1 .25  list 


fikMPERITE 

(gmpany 

561  Broadway 
New    York 


WRITE 
FOR 

CHART 
AR 


AMPERITE 

AUTOMATIC    REGULATORS 


LIST  PRICE 


$25 


oo 


Complete  With 
Mounting  Fixture 

FIDELITY!  TONE  RANGE!  DISTOR- 
TIONLESS POWER!  BEAUTY  OF  DE- 
SIGN and  EASE  OF  INSTALLATION! 
IT'S  ALL  THERE  IN  A  VIBRALOC  .  .  . 

Studio  or  Stadium  coverage  with  the 
same  reproducer  .  .  .  "if  you're  doubt- 
ful .  .  .  we've  S'ot  the  proof  .  .  . 
just  write." 

Patented  Acoustical  features  incorporated  in  the 
new  VIBRALOC  REPRODUCER  reveal,  for  the  first 
time,  brilliant  definition  in  tone  blending  at  any 
volume  level.  The  usual  beam  or  searchlight  effect 
is  rot  present  in  the  VIBRALOC  method  of  sound 
distribution,  resulting  in  freedom  from  reflection 
distortion  and  other  acoustical  troubles. 
Locking  mechanical  vibrations  at  the  source  of  audio 
sound  distribution  eliminates  disturbance  of  the 
original  wave  form,  permitting  movement,  into  free 
space,  minus  pressure  re-shaping  or  the  effects  of 
resistance  to  coil   movement. 

Order   Direct   Until    Your   Jobber 
Is   Stocked. 

JOBBERS!!    DEALERS!! 

Exclusive  Territories  Available! 

Catalogs  &  Proposition  Upon  Request. 


50 


Radio  Today 


v       ,h.  Tung-Sol  Con- 

sWnmentPl.n«°lk=  thout  any 

qu3Uiv.   *-  TUMM   p  ^  a  stock  oi 
pxemiu-nioxBnanc^P  M9ells 

^inthedeale--'  „onM, 

the,n...daductSn^*  lean-out 

plantnatas-"^*,^,,  tubes  « 
s,,a.  Capital  uauato  nvestmM,_ 

^eaaadtoothetptoh  ioinlosses 

Matna  dealer  «  P^^^p^, 
due  to  alo«  ""^.^e  competition 

making  basis- 

our  sales   office   nearest  j 

Dept. 


SjT 


.   yani2::f  Lotu-  Radio "3WW 

TUNG-SOl  tAMP  WORKS,  INC. 
',  Radio  Tube  Division  ,'■ 

SALES  OFFICES;  ATLANTA  •    BOSTON   -   CHICAGO 
.     KANSAS  CITY- -.LOS  ANGELES- -DETROIT  "•   NEV 
.--.'   GENERAL' OFFrCEs/NEWARK;  N.J.        ' 


0>THfi, 


TWO 
NEW  15  HIGH 
FIDELITY  SPEAKERS 


•  Type  G15-25 

•  15  INCH      •   30  WATT  PEAK 

•  20  WATT     •    High   Fidelity 

•  List     Price     $24.50     complete 
with  Transformer 


•  Type  HI  5  -25 

•  15  INCH      •   45  WATT  PEAK 

•  30  WATT      •    High   Fidelity 

•  List     Price     $28.50     complete 
with  Transformer 

These  two  new  speakers  present  a  triumph  in  preeision 
engineering:  and  olfer  audible  proof  of  Utah's  unexcelled  abil- 
ity  in   the   speaker   field. 

Both  types  show  brilliant  response  from  50  to  over  8,000 
cycles  without  the   use   of  tweeters,  cut   otf  networks,   etc. 

The  "Life-Tone"  quality  of  both  G15  -  25  and  HIS  -  25  is 
beyond  comparison ! 

Write  for   details. 

Visit  us  at  the  Radio  Show.  Room  561,  Stevens  Hotel,  and  Booths  113  and 
115,  Marconi  Boulevard,  Radio  Parts  City,  Stevens  Hotel,  June  8,  9,  10 
and  11. 


UTAH  RADIO  PRODUCTS  CO. 

CHICAGO,  U.S.A. 


BUENOS  AIRES  —  UCOA  RADIO  PRODUCTS  CO. 


16  YEARS  OF  LEADERSHIP 


April,  1938 


51 


AMERICA1 
MOVIE  CAMERA 


With  F:3. 5  Lens..  $19. 95 


UniveX  mass  distribution  methods 
—which  have  made  UniveX  movie 
cameras  and  projectors  the  largest 
selling  in  the  world  —  now  bring 
accessories  to  the  point  where  every- 
body can  afford  them!  Here's  your 
opportunity  to  build  a  real  volume 
accessory  business  on  a  small  inven- 
tory and  keep  customers  coming 
back  to  your  store  again  and  again! 

Quality  Movie  Accessories 

When  you  sell  a  UniveX  Cine  "8" 
your  customer  also  saves  on  accessories 
—for  UniveX  high  quality  accessories 
are  available  at  the  lowest  prices  in  all 
movie  history!  Feature  them! 
UniveX  Projector  Only  motor- driven 
8  mm.  projector  under  $26.  Fifteen 
important  features  ....  $14.95 
UniveX  Titier  Specially  designed  for 
UniveX  Cine  "8".  Title  cards  and  let- 
tering kit  included  ....  $2.50 
UniveX  Exposure  Meter  Insures  prop- 
er exposure  under  all  light  condi- 
tions      $1.95 

UniveX  Exposure  Meter  Case  350 
UniveX  Film  Viewer  &  Editor  Enables 
you  to  properly  edit  your  own  movies. 
1/5  the  cost  of  other  devices  .  $1.95 
UniveX  Splicer  For  any  8  mm.  film. 
Makes  strong  splices  quickly.  Com- 
plete with  cement  ....  $1.00 
Telescopic  View  Finder  Insures  per- 
fect focusing.  Compensates  for  Para- 
lax  on  close-ups.  Fits  any  model 
UniveX  Cine  "8" $1.95 

Prices  Higher  Outside  United  States 


SELLING  MORE  RECORDS 


TALKING  TO  MUSIC  LOVERS 

+  A  good  many  record  salesmen 
are  still  embarrassed  about  what  they 
consider  to  be  a  fatal  lack  of  knowl- 
edge of  classical  music.  However, 
the  record  companies  are  regularly 
furnishing  material  which  fills  any 
such  gap;  appropriate  notes  accom- 
pany releases  on  new  classical  record- 
ings and  give  the  record  merchandiser 
the  useful  and  interesting  facts. 

Here  is  a  sample  of  background 
material,  furnished  in  this  case  in 
connection  with  Columbia  Master- 
works'  April  release  of  Alfred  Wal- 
lenstein's  "Sinfonietta"  recording  of 
Mozart's  Symphony  No.  25. 

"Alfred  Wallenstein  was  born  in 
Chicago.  Before  the  age  of  ten  he 
was  already  devoting  himself  to  the 
cello.  At  fourteen,  he  went  to  Eu- 
rope alone  to  study.  Still  in  his  teens 
he  toured  with  such  artists  as  Schu- 
mann-Heink,  Maud  Allen  and  Pav- 
lowa.  From  1922  until  1929  he  was 
leading  cellist  with  the  Chicago  Sym- 
phony Orchestra.  At  the  personal  re- 
quest of  Toseanini,  Wallenstein  came 
to  New  York  as  first  cellist  of  the 
New  York  Philharmonic-Symphony. 
He  left  that  post  to  take  over  the 
musical  directorship  of  Station  WOE 
and  devote  himself  entirely  to  con- 
ducting. With  this  release  he  now 
becomes  an  exclusive  Columbia  re- 
cording artist. 

"In  the  past  few  years  Alfred  Wal- 
lenstein has  gained  a  tremendous  rep- 
utation for  himself  because  of  his 
well-known  weekly  'Sinfonietta'  and 
'Symphonic  Strings'  nation-wide 
broadcasts.  In  these  programs  one 
is  almost  certain  to  find  music  that  is 
seldom  heard,  for  Wallenstein  fre- 
quently includes  rarely  played  music. 
Eecently  he  drew  from  obscurity  and 
boadcast  Mozart's  Symphony  No.  25." 


Practically  a  complete  record  depart- 
ment in  itself,  this  unit  is  designed 
for  display,  selling  counter  and  stock- 
room service.  It's  an  all-steel  affair 
in  red,  black  and  gold,  from  RCA- 
Victor. 


WAX  WORTH  WATCHING 


•  ANDREWS  SISTERS  singing  Ti-Pin-Tin  and 
Where  Have  We  Met  Before — Decca  17003. 

DICK  ROBERTSON  and  his  orchestra  playing  Drop 
a  Nickel  in  the  Slot  and  You  Went  to  My  Head, 
both  with  VC  by  Dick  Eobertson — Decca  1706. 

LEO  REISMAN  and  his  orchestra  playing  Mariacbie 
(rumba)  from  the  MGM  film  "Girl  of  the  Golden 
W.st"  with  VE  by  Felix  Knight,  and  Para  Vigo  Me 
Voy    (rumba) — Victor   25S04. 

FRANK  LUTHER,  arranging  and  producing  the  com- 
plete story  in  song  (with  orchestral  accompaniment) 
of  Snow  White  and  the  Seven  Dwarfs  on  three  records 
—Decca  1700-01-02. 

RED  N0RV0  and  his  orchestra  playing  There's  a 
Boy  in  Harlem  with  VC  by  Mildred  Bailey,  and  How 
Can  You  Forget  with  VC  by  Terry  Allan,  both  from 
"Fools  for  Scandal." — Brunswick  8089. 

TOMMY  D0RSEY  and  his  orchestra  playing  Jezebel 
from  Warner  Bros.'  film  of  the  same  name,  and 
Bewildered,  both  with  VR  by  Jack  Leonard — Victor 
25795. 

DUKE  ELLINGTON  and  his  orchestra  playing 
Scrounch  and  If  You  Were  m  My  Place,  both  with 
VC  by  Ivy   Anderson — Brunswick  8093. 

MAXINE  (Vocadence)  Sullivan,  with  Claude  Thorn- 
hill  and  his  orchestra  singing  Dark  Eyes  and  It  Was  a 
Lover  and   His  Lass — Victor  25810. 

AL  DUFFY  FOUR  playing  Ciribiribin  and  Maria 
Ah  Maria — Decca  1683. 

LEWIS  "RED"  EVANS  and  the  Boys  playing 
Thanks  for  the  Memory  (two  parts),  from  the  Para- 
mount film  "Big  Broadcast  of  1938,"  with  vocal  re- 
frain by  "Red"  Evans — Victor  2578S. 


Universal  Camera  Corp. 

Dept.  73,  32  W.  23rd  St. 

New  York  City 

Send  me  free  booklet  "How  To  Take  and 

Show  Movies."  Also  catalogue  of  UniveX 

Cine  Accessories. 

Name 

Address. 

City. 


UftUr&( 


52 


Radio  Today 


NEW  BOOKLETS 


•  "Move  to  the  Mountains — Yet 
Stay  at  Home"  is  the  title  of  a  new- 
folder  issued  by  Johnson  Motors, 
Refrigeration  Division,  Galesburg, 
111.,  illustrating  and  describing  the 
new  Johnson  Space  Cooler. 

•  "Ain't  It  The  Truth"  is  the 
title  of  a  special  folder  issued  by 
Aerovox  Corp.,  70  Washington  St., 
Brooklyn,  N.  Y.,  featuring  the  com- 
pany's radio  noise  eliminators. 
Cover  has  a  lively  cartoon  style. 

•  Now  available  from  Triplett 
Electrical  Instrument  Co.,  Bluffton, 
Ohio,  are  new  price  sheets  Nos.  47T 
and  47-1.  Changes  in  these  issues 
include  additional  information, 
price  changes,  and  announcement  of 
new  instruments. 

•  Completely  new  12-page  cata- 
log giving  the  details  on  the  entire 
line  of  IRC  Standard  Resistors  and 
Volume  Controls,  has  been  released 
by  International  Resistance  Co.,  401 
N.  Broad  St.,  Philadelphia,  Pa. 
Added  to  the  regular  IRC  products 
are  seven  new  items.  Copies  from 
jobbers  or  direct  from  IRC. 

•  Relays,  timers  and  thermo- 
stats are  covered  in  detail  in  a  new 
technical  catalog  just  issued  by 
Struthers  Dunn,  Inc.,  139  N.  Juni- 
per St.,  Philadelphia,  Pa.  Free 
copies  will  be  sent  to  those  request- 
ing catalog  D  and  mentioning 
Radio  Today. 

•  Cornell-Dubilier  catalog  flyer 
No.  154-A  lists  two  new  C-D  prod- 
ucts, the  type  BR  "Beavers,"  tiny 
etched-foil  dry  electrolytic  filter  ca- 
pacitors, and  the  type  2R  silver- 
plated  mica  capacitors.  Address  re- 
quests to  Cornell-Dubilier  Electric 
Corp.,  South  Plainfield,  N.  J. 

•  A  folder  titled  "Third  Year 
for  Pleasantaire  Conditioning"  has 
been  released  by  Pleasantaire  Corp., 
1623  Connecticut  Ave.,  Washington, 
D.  C.  It  contains  description,  speci- 
fications and  sales  chances  for  the 
Model  B2000  room  cooler. 

•  A  feature  folder  on  new  Pre- 
cision instruments,  series  860  and 
series  510,  is  available  from  Preci- 
sion Apparatus  Corp.,  821  E.  New 
York  Ave.,  Brooklyn,  N.  Y. 

•  "It  Performs  Like  Magic!"  is 
the  title  of  a  new  folder  released  by 
Commun-a-phone  Systems,  Inc., 
1175  Broad  St.,  Newark,  N.  J.  Mag- 
ic-Phone intercommunicating  sys- 
tems are  described  and  illustrated. 

•  New  JPD  1938  catalog  fea- 
tures auto  radio  cable  replacing 
tools,  fittings,  shafting  and  casing, 
antennas,  insulators,  tuning 
wrenches,  noise  suppressors,  etc. 
Illustrations  also  show  assort- 
ments of  woven  fabric  dial  belts 
for  all  home  sets,  packed  in  steel 
kit  boxes.  Many  other  home  set 
and  auto  radio  accessories  are  pic- 
tured and  priced.  J.  F.  D.  Mfg.  Co., 
4111  Fort  Hamilton  Parkway, 
Brooklyn,  N.  Y. 


ADDISON  AUTOMATIC  TOUCH  TUNER 


MODERNIZE  Your  Present  Radio  In- 
ventory with  the  Outstanding  Devel- 
opment of  the  Season — Touch  Tuning. 

EASY   TO    INSTALL     .     .     . 
No   Special   Tools   Required. 

Adaptable  to  ANY  Superheterodyne 
Radio — Works  perfectly  on  all  mod- 
els—  No  Dial  Manipulation  is  neces- 
sary.    Action    is   instantaneous. 


LIST   PRICES 

Model 

Button— 500— $5.50 

Button— 600— S7.00 

Button— 700— $8.50 


Write  for  complete  de- 
tails and  Special  Dis- 
tributor and  Dealer 
discounts. 

Manufactured  and 
Guaranteed  by 


S  Button— 800— $10. 

ADDISON  RADIO  MFG.  CO.,  INC. 

3017  CARROLL  AVE.    CHICAGO,  ILL. 


PARRISDUNN  NEW  HYTOWER 
AGAIN  YEARS  AHEAD 

in 

JJuKaMtif 


The  Proven  "slip  the  wind" 
governing  principle  that 
made  Hy-Tower  famous  the 
world  over  is  retained  and 


U  U/iphovect  rln/ 

AMERICA'S    LEADING 
Iradio  MANUFACTURERS 


New 


Heavy  Duty  Shield- 
ed Air-Cooled 
Three-Brush  G  e  n  - 
erator  with  new 
patented  rear  pivot 
shock  absorber 
mounting. 

WRITE  OR  CABLE  TODAy   FOR 
COMPLETE   INFORMATION 

PARRIS-DUNN    CORP. 

CLARINDA       Dept.   RT-391         IOWA 


April,  1938 


53 


orf-  BUENOS 


RES 


•  In  that  Metropolitan  store 
on  the  Calle  Rivadavia  869 
Mr.  Francisco  Fernicola,  the 
proprietor,  is  enthusiastic,  for 
he  writes,  "They  ask  for  them 
.  .  .  these  servicemen  and 
amateurs  .  .  .  and  come  hack 
again  and  again  for  other 
Centralab  parts.  Naturally,  I 
must  agree  with  them  that 
they  are  the  best." 

In  the  Argentine,  Brazil,  Swe- 
den, France,  Australia  .  .  . 
the  fame  of  Centralab  parti 
persists. 


Smooth  controls,  permanent  re- 
sistors, positive  selector  switches, 
perform  their  miracles  in 
myriad  languages  in  all  parts 
of  the  globe. 


Manufacturers,     servicemen     and 
amateurs      everywhere 
SPECIFY  CENTRALAB. 

Get  the  Centralab 
Volume  Control  Guide 


Gentealab 


Milwaukee,  Wis. 

Division  of  Globe  Union,   Inc. 

BRITISH    CENTRALAB.    Ltd. 

Canterbury    Road,     Kilburn 

London,  N.W.6,  England 

FRENCH  CENTRALAB  CO. 

118   Avenue   Ledru-Rollin 

Paris  XI,  France 


NEW  THINGS 

(From  page  18) 


Mallory  vibrators 

■*•  Line  of  replacement  vibrators 
featuring  8  contacts.  For  farm  and 
auto  receivers.  Positive  starting, 
easy  installation.  Freedom  from 
lead  breakage,  freedom  from  broken 
reeds.  Complete  listing  in  bulletin 
E-551.  P.  R.  Mallory  &  Co.,  3029  E. 
Washington  St.,  Indianapolis,  Ind. 
Radio  Tday — see  also  advt.  p.  1. 


Hi-voltage  electrolytic 

•k  Dry  electrolytic  condenser 
with  585  DC  volt  continuous  rating. 
Peak  rating  of  700  volts.  Self-heal- 
ing after  breakdowns.  Designed  for 
use  in  amplifiers  having  high  volt- 
ages. Super-Volt  manufactured  by 
Dumont  Electric  Co.,  Inc.,  514 
Broadway,  New  York,  N.  Y. — Radio 
Today — see  also  advt.  p.   59. 


6-volt  Winchargers 

+  Heavy-duty  6-volt  wind  driven 
generator  which  starts  charging  in 
a  6-mile  an  hour  breeze.  Supplies 
22  to  25  amps.  8-foot  propeller. 
Auto-type  brake.  The  Low-wind 
type  starts  in  4  mile  wind.  Out- 
put of  12  to  14  amperes.  Designed 
especially  for  the  southeast  part  of 
U.  S.  where  wind  velocity  is  low. 
Wincharger  Corp.,  Sioux  City,  Iowa. 
— Radio  Today. 


Univex  camera  case 

*  Jiffy  case  for  Univex  minicam. 
Brown  case  that  permits  instant 
shooting  without  removal  of  cam- 
era. Viewfinder,  shutter  release  and 
winding  knob  accessible  when  open. 
Complete  with  shoulder  strap — list 
$1.  Universal  Camera  Corp.,  32 
West  23rd  St.,  New  York,  N.  Y.— Ra- 
dio Today — see  also  advt.  p.  52. 


Marion  meters 

*  Line  of  meters  having  D'Ar- 
sonval  movement  with  2  per  cent 
movement.  Sapphire  jewel  pivots. 
Sealed  against  dust.  Bakelite  cases. 
Model  54S  illustrated.  Case  dimen- 
sions— 4%  x  4  3/16  inches.  Mounts 
in  2%-inch  hole.  Marion  Electrical 
Instrument  Co.,  Manchester,  N.  H. 
— Radio   Today'. 


Tom  Thumb  radio 

•  4-tube  AC-DC  T.R.F.  receiver. 
Dynamic  speaker,  illuminated  dial. 
Self-contained  antenna.  Size  7  x 
4%  x  3%  inches.  List  $9.95.  Au- 
tomatic Radio  Mfg.  Co.,  Inc.,  122 
Brookline  Ave.,  Boston,  Mass. — Ra- 
dio Today. 


Vertical  antenna 

*  All-wave,  non-directional  ver- 
tical antenna  mast.  Consists  of  4 
sections  of  steel  tubing  telescoping 
one  within  another.  Extends  to  24 
feet.  Mounted  on  sturdy  wood  insu- 
lator which  is  attached  to  a  steel 
ground  post.  Designed  for  use  with 
RCA  Magic  Wave  coupling  unit  and 
transmission  line.  Premax  Products 
Div.,  Chisholm-Rider  Co.,  Niagara 
Falls,  N.  Y. — Radio  Today — see  also 
advt.  p.  55. 


54 


Radio  Today 


NEW! 

Easy  to  Erect! 

Hot  Seller! 


VOES  up  in  small 
space  —  gives  world- 
wide reception.  Built 
of  tubular  steel,  tele- 
scoping to  eV  length. 
Premax  Lock  permits 
erection  up  to  24'. 
No  guys!  No  Over- 
head Wires.  Comes 
Vt"  complete  with  4-sec- 
tion  mast,  insulator 
unit  and  steel  ground 
post.  Write  today 
for  bulletins  and  dis- 
counts. Lists  $10. 
Order  a   sample. 


ipemaxipojuck 

0,*,siaa  oP  Ch.sholm- Ruder  Co..  Inc. 


3846    HIGHLAND    AVE. 
NIAGARA  FALLS,  N.  Y. 


B0  1 

BhBrT''- 

^■^^^l 

1^^  J 

m    hSKSB 

Mx 

i§IJk 

Remote  radio  tuner 

+  Remote  push  button  tuner  for 
use  with  any  radio  set.  Electric 
motor  drive  permits  setting  stations 
at  any  frequency.  Handles  up  to 
7  stations.  Supplied  with  20-foot 
cable.  Housed  in  compact  wooden 
case.  List  $16.75.  Addison  Radio 
Mfg.  Co.,  3017  Carroll  Ave.,  Chicago, 
111. — Radio  Today — see  also  advt.  p. 
53  and  56. 


Precision  resistors 

+  Wire-wound  precision  resist- 
ors. Types  WW-5,  WW-6,  WW7, 
WW-8,  WW-9  are  intermediate  sizes 
for  flexible  mounting,  also  provid- 
ing as  in  WW-5  high  ohmages  non- 
inductively  wound  on  a  small  form. 
WW-8  and  WW-9  are  center-tapped, 
inductively  wound  to  save  space. 
WW-12,  WW-13,  WW-14  have  both 
terminals  at  1  end.  Tolerances  up 
to  1/10  of  1  per  cent.  International 
Resistance  Corp.,  401  N.  Broad  St., 
Philadelphia,  Pa. — Radio  Today — 
see  also  advt.  p.  58. 


Fixed  power  resistors 

*  Power  resistors  with  choice  of 
coating  for  various  operating  con- 
ditions. Inorganic  cement  used 
when  overloads  are  incurred.  May 
be  operated  at  red  heat  without 
danger.  Varnished-coated  type  used 
for  maximum  protection  in  humid 
locations  or  where  acid  vapors  are 


Auto  Radios  For  1938 
by  TRAV-LER 

These  new  7-Tube  Trav-ler  models  have  full  8  watts  power 
output.  Sensitivity  is  1.5  microvolts  at  one  watt  output.  Has 
full  A.V.C.  and  three-gang  variable  condenser.  Has  the  very 
latest  features  including  iron  core  coils. 


*My     the   „ 


-S£ 


JtS 


*°^>ott    »e^?o>^ 


l°f 


J.  flKEN  from  a  dealer's  letter 
written  one  week  after  he  took  on 
the  Presto  line. 

He  is  one  of  the  growing  organ- 
ization of  Presto  dealers  who  now 
receive  over  400  factory  leads 
each  month  on  radio  stations, 
schools,  advertising  agencies, 
industrial  concerns  and  individ- 
uals who  are  considering  the 
purchase  of  Presto  sound  record- 
ing eguipment. 

You  owe  it  to  yourself  to  get  in- 
formation on  the  sound  recording 
business  ...  a  business  that  has 
almost  doubled  in  the  past  year 
in  spite  of  current  business  trends . 


Send  for  free  bulletin  "How  to  Sell 

the  Presto  Sound  Recorder."  It  tells 

the  whole  story. 


PRESTO 

RECORDING 
CORPORATION 

1137  WEST  19th  St. 
NEW  YORK,  N.  Y. 


7-TUBE  AUTO  SET  with  external  S  in.  elec- 
tro   dynamic    speaker — Model    711 — Price. 

7-TUBE  RADIO  with  self-contained  6i/2  in. 
electro  dynamic  speaker — Model  710 — Price 


$59.95 
$49.95 


The  Trav-Ler  Electric  Automatic  Tuning 
Unit  is  simple  and  accurate.  No  drift  or 
backlash — instantly  set  up  from  the 
driver's  seat  without  tools — any  station 
on  any  button — 6  buttons — motor  driven. 
Mounting  holes  provided  for  CI  7  QC 
easy    installation.      Price -JHI.3J 


19584 


)I92I\    1Q36   WEST   VAN  BUREN  ST.,  CHICAGO,   ILt 

AC    AND    AC-DC    HOME    SETS  <&>  AUTO    SETS  c<?J  BATTERY    SETS 

April,  1938 


55 


ADDISON 

Automatic  Push  Button 

TUNERS 


For  ffte   Cor— ELECTRIC  TOUCH 
TUNING;  ACCURATE,  SIMPLE 

For  the  Home — REMOTE  TOUCH 
TUNING  AT  ANY   DISTANCE 


Complete  safety  tuning. 
Instant  control.  10  KC. 
separation.  No  drift. 
Automatic  muting.  Dial 
pointer  moves  with  but- 
tons. Simple  to  install. 
Fits  any  radio. 


LIST 


$14 


50 


Tune     any     of     7     favorite 
LIST  stations    and    adjust    vol- 

ume, all  from  any  conve- 
im  ^^7R  "ient  location.  'Accurate, 
*■■%  clear,      no     drift.      10      KC. 

m  %J  separation.       With     20     ft. 

flat   remote   cable   and   in- 
structions. 


Write  for  full   details  and  special  dealer 
and   distributor   discounts. 

ADDISON  RADIO  MFG.  CO.,  INC. 

3017  Carroll   Avenue,   Chicago,   III. 


present.  Varnish  coated  units  in 
5  and  10  watts,  cement  in  10  and 
20  watts.  Clarostat  Mfg.  Co.,  Inc., 
285  N.  6th  St.,  Brooklyn,  N.  Y. 
— Radio  Today. 

Sprague   midget  electrolytics 

*  Small  etched-foil  electrolytic 
condensers.  "Atoms"  are  available 
in  standard  sizes  and  voltages.  8 
mfd.  450  volts  measures  %-inch  di- 
ameter by  1%  inches — list  60  cents. 
Hermetically  sealed — yet  protected 
against  blow-ups.  Designed  for  re- 
placement work  in  all  types  of  sets. 
Sprague  Products  Co.,  North 
Adams,  Mass. — Radio  Today. 

Multi-coupler  antenna  system 

+  Master  type  all-wave  antenna 
system  for  use  where  multiple  radio 
outlets  are  needed.  Ideal  for  apart- 
ment houses — also  suited  for  homes 
where  more  than  1  radio  is  used. 
Provides  noise  reduction  on  all  fre- 
quencies. One  antenna  operates  10 
to  25  sets.  Unit  consists  of  antenna 
transformer  and  multi-coupler  unit 
for  each  radio  outlet.  Easy  to  in- 
stall— designed  for  outside  wiring. 
Amy,  Aceves  &  King,  Inc.,  11  West 
42nd  St.,  New  York,  N.  Y—  Radio 
Today — see  also  advt.  p.  59. 


Sky-Chief  table  sets 

*  6-tube  AC-DC  superhet  with 
beam  power  output  tube.  Tunes 
broadcast  and  state  police  bands. 
Two-tone  walnut  veneer  cabinet. 
Dial  of  recessed  type  with  double 
gold-color  scale.  Model  38-2 — list 
124.95. 

5-tube  AC-DC  superheterodyne 
with  self-contained  aerial.  Has  dy- 
namic speaker.  Walnut  cabinet. 
Model  38-1— list  $14.95.  Sky-Chief 
Radio  Corp.,  44  W.  18th  St.,  New 
York,  N.  Y. — Radio  Today — see  also 
advt.  p.  62. 


There  is 

MONEY  in 


MODERNIZING  old  sets 

with  the  ULTRA  NEW 

BROWNING     83 

DX  reception  —  4  overlapping  bands  •— 
High  fidelity  —  Exceptional  signal  to 
noise  ratio  —  AC  or  battery-operated 
and  quickly  convertible. 


Bringing  old  receivers  up-to-date  with  the  Browning  B3 
is  a  tremendous  field  and  a  real  profitmaker  for  the 
service  man.  Millions  of  obsolete  chassis  are  reposing 
in  fine  old  consoles,  bookcases,  secretaries  and  other 
pieces  of  furniture — all  worthy  of  a  modern  set. 

Browning  S3  enables  you  to  give  your  customer  a  cus- 
tom-built set  which  you  build  from  our  specifications. 
A  real  market  for  your  time!  A  big  outlet  for  parts! 
Send   coupon  today. 


RT1 
BROWNING  LABORATORIES,  INC. 
750  Alain  Street,  Winchester,  Mass. 

Send  free  circuit  diagram  and  descriptive  literature. 

Name     

Street    

City    and    State 


RADIO  SERVICEMEN  OF  AMERICA 
NOW  HAS  27  CHAPTERS 

*  RSA  reports  that  the  mem- 
bership has  tripled  in  the  last 
ninety  days.  Four  new  chapters 
have  affiliated  making  the  total 
chapters  now  operating  twenty- 
seven. 

The  influence  of  the  RSA  to- 
wards the  betterment  of  existing 
evils  in  the  radio  service  industry 
is  becoming  more  apparent  each 
day. 

Applications  are  on  file  from 
ten  more  local  associations  located 
in  every  section  of  the  country. 

We  are  in  the  process  of  mail- 
ing free  of  charge  to  all  of  our 
members  the  second  of  a  series  of 
advance  technical  information. 
The  first  issue  of  our  house  organ, 
The  Radio  Serviceman,  was  mailed 
to  our  members  in  February  and 
the  second  mailing  is  going  for- 
ward in  the  next  few  days. 

New  Hampshire — The  members 
of  the  New  Hampshire  Chapter 
RSA  met  at  a  dinner  on  March  1st 
in  Hudson  and  elected  the  follow- 
ing officers:  Chairman,  George  J. 
Craig;  vice-chairman,  Ray  Gal- 
lagher; secretary,  Ray  Rogers; 
and  treasurer,  George  P.  Lefebvre. 

New  Bedford — One  of  the  new- 
est local  organizations  to  join  the 
RSA  is  the  Whaling  City  Chapter 
located  in  New  Bedford,  Mass.  The 
following  officers  were  elected  to 
guide  the  chapter  for  the  year: 
President,  Fred  Fiske;  vice-presi- 
dent, J.  A.  Sumner;  secretary, 
James  L.  Shepley;  and  treasurer, 
Walter  England. 

Regular  meetings  are  held  on 
the  third  Wednesday  of  every 
month  in  the  Labor  Temple  at 
New  Bedford. 

Interstate  —  The  Interstate 
Chapter  met  on  March  15th  at  the 
Midwest  Timmerman  Building, 
Dubuque,  Iowa,  and  the  business 
part  of  the  meeting  was  opened 
by  a  discussion  on  the  formulation 
of  a  list  of  slow  pay  customers 
which  could  be  operated  as  credit 
information  bureau  for  the  benefit 
of  all  the  members.  The  motion 
adopted  such  a  list  was  carried 
over  until  a  following  meeting  in 
order  that  more  discussion  may 
be  had. 

Nasvhille — One  of  the  newer 
chapters  to  join  the  RSA  is*  the 
Nashville  Chapter.  They  are  just 
getting  started  on  the  work  under 
the  able  leadership  of  Mr.  Frank 
Clark  and  R.  Thomas. 

Boston — The  Boston  Chapter  of 
RSA  were  guests  at  a  lecture  held 
in  The  Norfolk  House  Centre  on 
March  21st,  at  which  time  Mr. 
'Connor  of  the  Sylvania  Tube  Cor- 
poration spoke  to  the  members. 

The  chapter  is  slowly  but  surely 
correcting  many  of  the  evils  of  the 
service  industry  which  have  been 
prevalent  in  the  Boston  area. 

Oklahoma  City — Oklahoma  City 
Chapter  reports  through  its  secre- 
tary, L.  G.  Dearing,  that  they  are 
contemplating  a  membership  drive 


56 


Radio  Today 


in  the  near  future  which  should 
result  in  doubling  the  membership 
of  the  chapter. 

New  Jersey — Meetings  are  held 
semi-monthly  on  Tuesdays  at  the 
Hotel  Douglas  in  Newark.  Techni- 
cal meetings  are  scheduled  for 
April  12th,  26th  and  May  10th. 
Al  Fasanello  of  187  Highland  Ave., 
Newark,  is  secretary. 

RSA  reports  the  election  of  the 
Board  of  Directors  as  follows: 

Second  district:  L.  G.  Dearing. 
1116  N.  Walker,  Oklahoma  City, 
Oklahoma. 

Fourth  district:  T.  P.  Robinson, 
2712  N.  Henderson  Avenue,  Dal- 
las, Texas. 

Fifth  district:  E.  H.  Bertelsen, 
2344  38th  Street,  Rock  Island,  Il- 
linois. 

Seventh  district:  Howard  S. 
Watts,  918  E.  6th  Street,  Duluth, 
Minn. 

Eighth  district:  Lee  Taylor, 
1352   Catalpa,  Chicago,  Illinois. 

Ninth  district:  Joseph  A.  Cole, 
13065  Camden  Avenue,  Detroit, 
Michigan. 

Tenth  district:  Donald  H. 
Stover,  9  S.  Galena  Avenue,  Free- 
port,  Illinois. 

Twelfth  district:  Albert  J.  The- 
riault,  2712  W.  25th  Avenue, 
Cleveland,   Ohio. 

Thirteenth  district:  Gerard  G. 
Larkin,  1375  Pennsylvania  Ave- 
nue, S.E.,  Washington,  D.  C. 

Fifteenth  district:  Carl  A.  Rau- 
ber,  Somerville,  N.  J. 

Sixteenth  district:  Kenneth  A. 
Vaughan,  312  Market  Street, 
Johnstown,  Pa. 

Seventeenth  district:  George  A. 
Duvall,  8005  3rd  Avenue,  Brook- 
lyn, N.  Y. 

Eighteenth  district:  Henry  M. 
Lutters,  758  E.  230th  St.,  Bronx, 
N.  Y. 

Nineteenth  district:  John  T. 
Rose,  5  S.  Duane  Avenue.  Endi- 
cott,  N.  Y. 

Twentieth  district:  None. 

NY  SERVICEMEN  STUDY 
BUSINESS  COSTS 

*  At  the  May  9  meeting  of  the 
Radio  Servicemen  of  America,  to 
be  held  at  8  p.m..  Hotel  Victoria, 
New  York  City,  a  feature  will  be 
the  discussion  of  the  cost  of  mak- 
ing service  calls,  led  by  A.  E. 
Rhine,  A.  E.  Rhine  Engineering 
Service.  Based  on  his  own  prac- 
tical experience  of  18  years  in  ser- 
vicing, Mr.  Rhine  will  show  what 
the  actual  cost  per  hour  to  the 
serviceman  is,  how  to  compute  this 
cost,  and  why  all  charges  and  esti- 
mates should  be  made  only  after 
this  cost  is  known. 

Charles  Yokum  of  Weston  Elec- 
trical Instrument  Corporation  will 
discuss  the  application  of  instru- 
ments to  servicing  work. 

•  Harry  Gerber,  49  Portland 
St.,  Boston,  Mass.,  sales  representa- 
tive for  Aerovox  condensers  and 
resistors  in  the  New  England  area, 
last  month  celebrated  the  begin- 
ning of  his  15th  year  of  his  affilia- 
tion with  the  firm. 


*  T.  Lundahl,  head  man  of 
Technical  Appliance  Corp.,  17  E. 
16th  St.,  New  York  City,  returned 
recently  after  a  tour  among  jobbers 
and  manufacturers  in  Detroit,  Mil- 
waukee. Chicago,  Terre  Haute,  In- 
dianapolis and  Rochester.  Lundahl 
is  active  in  a  national  campaign  to 
get  the  public  conscious  of  the  need 
for  a  post-winter  check-up  on  an- 
tennas. In  the  field,  he  found  the 
best  sales  jobs  being  done  by  those 
who  are  using  every  sales  and  ser- 
vice contact  as  an  "opener"  for  an- 
tenna sales  and  service. 


*  Now  effective  is  a  price  reduc- 
tion on  TJ-U  Dykanol  capacitors, 
announced  by  Cornell-Dubilier  Elec- 
tric Corp.,  South  Plainfield,  N.  J. 
The  step  was  taken  mostly  because 
enlarged  production  facilities  were 
made  possible  following  increased 
demand  for  these  capacitors  from 
the  U.  S.  Army,  Navy  and  Signal 
Corps. 


*  Ward  Leonard  Electric  Co., 
has  appointed  Charles  D.  Southern, 
30  W.  Rudisill  Blvd.,  Ft.  Wayne, 
Ind.,  as  sales  representative  for  WL 
radio  products  in  the  entire  state 
of  Indiana. 

*  Paul  M.  Bryant  has  resigned 
the  post  of  assistant  to  the  presi- 
dent of  Zenith  Radio  Corp.  to  be- 
come executive  vice-president  of 
Pervel  Corp.,  11  West  42nd  St., 
New  York  City. 


KNOBS! 

Quality   knobs,    molded   of   Battel ite,    Durez,    Plaskon   or 

Beetle.     Standard    [4."    shaft.     Set    screw    or    spring 

mounting.     Standard   colors:     Black,   ivory  and   walnut. 

Other  colors  made  to  order. 

RADIO    KNOBS — Touch   Tuning    Knob 

No.  1760.   Patented   assembly   method. 

Made  either  with  a  recess  for  station 

calls,    as    shown,    or    plain.      31  64" 

diameter;  9  16"   high. 

No.    1750.    touch    tuning    knob,    plain 

top,    push    on    self    locating;    31  64" 

diameter;   9/16"    high. 


m 


No.   1400 
Dia.  11/16" 
Hgt.  13 '32" 

No.  1450 
Dia.  11  16" 
Hgt.  13  32" 


Actual   size  Actual   size 

POINTER-BAR-LEVER-CONTROL  KNOBS— For  use 
on  instruments,  meters,  controls,  switches,  valves, 
stoves,  timers,  rheostats.  X-ray,  radio,  intercommuni- 
cation,   sound   amplifying   and    other   products. 


No.  2110.  illustrated,  especially  adapted  for  inter- 
communicating systems.  1%"  long  overall;  19  32" 
high:  11,16"  dia.  at  large  end.  Metal  insert.  Pat.  app. 
No.  2100,  2!'2"  long  overall;  %"  high;  11/16"  dia. 
at   large   end.     Metal    insert.     Pat.   app. 

HARRY  Send  for 

^^      m.     m  m  w   h    *m         illustrated 

DAVIES    ccta;offo/ 

other    stock 
COMPANY  items 

HOLDERS    Or    PLASTICS 

1428  N.  Wells  St.,  Chicago,  IU. 

Consult  Us  on  Your  Moulding  Problems 


GIVE  ALL  TUBES  A  COMPLETE  TEST 


0# 


m0&^ 


Model  1504 
Denier 


Now  Equipped  With 
PLUG-IN  TYPE  RECTIFIER 

(exclusive   Triplett   feature) 

Model   1504   Combines   in   One 

Tester  the  Following  Servicing 

Instruments 


1.  Power  Output  Test  for 
All    Amplifying    Tubes. 

-.  Emission  Test  for  All 
Tubes. 

3.  Free    Point    Tester. 

4.  Xeon    Short    Test. 

3.   Separate   Diode   Test. 

6.  D.C.    Voltmeter. 

7.  D.C.    Milliammeter. 

5.  A.C.    Voltmeter. 
9.    Ohiunieter. 

10.  Condenser  Test  for 
Shorts. 

11.  Electrolytic    Condenser 
Leakage    Test. 

1-.   Decibel   Meter. 


TUBE  TESTER 

Mode!    1502   — DEALER    PRICE S40.33 

Model    1503* — DEALER    PRICE S51.33 

•Same  as  1S04  less  Free   Point  T 


•LECTRICAL     INSTRUMENTS 


The   Triplett    Electrical    Instrument   Co. 
194    Harmon    Drive,    Bluffton,    Ohio 
Please    send    me    more    information    on — 
□Model  1504        QModel  1502        ^Model  1503 

Name     

Address     

City State 


April,  1938 


57 


m 


^&M^M^m 


LATED 
Metallised  TYPE    BT 

RESISTORS 

Almost  any  piece  of  carbon 
is  a  resistor  . .  but  a  really 
good  resistor,  scientifically 
designed  to  meet  every 
requirement  of  Radio, 
is  something  else  again. 

IRC  Resistors  may  cost  a 
little  more  to  buy  .  .  But 
they  actually  cost  far  less 
to  use  in  all  replacement 
work.  There's  no  come- 
back when  you  use  IRC's. 
They  never  let  you  down  . . 


INTERNATIONAL 
RESISTANCE  COMPANY 

401  N.  Broad  St..  Philadelphia.  Pa. 


MOTOROLA  CONTINUES 
HOME  SETS 

O.  H.  Caldwell, 
Editor,  Radio  Today: 

I  am  very  happy  indeed  to  an- 
swer your  inquiry  regarding  the  Mo- 
torola home-set  line  for  the  coming 
season.  I  want  to  state  very  definitely 
to  you  that  Motorola  will  have  a  line 
of  home-set  receivers  for  this  coming 
season. 

It  is  true  that  we  have  somewhat 
revamped  our  organization,  the  reason 
being  that  we  have  changed  our  plans 
for  the  issue  of  a  home-set  line  for 
this  coming  season  from  the  original 
plan  that  we  had  last  Fall. 

We  sincerely  believe  that  the  plans 
that  we  have  in  mind  in  regard  to  the 
1938-39  Motorola  home-set  line  will 
meet  with  extreme  interest  on  the  part 
of  the  retail  dealer.  We  sincerely  be- 
lieve that  in  the  issue  of  our  new  line 
we  will  overcome  many  evils  that  have 
caused  dealer  suffering  in  home  sets 
the  last  few  years. 

Statements  as  to  our  specific  plans 
will  be  outlined  in  our  trade  paper 
ads  starting  in  the  May  issues. 

We  are  looking  forward  with  ex- 
treme interest  for  a  very  progressive 
line  of  home-set  receivers  this  com- 
ing season. 

With  kindest  personal  regards,  I 
remain, 

Yours  very  truly, 

P.  V.  Galvin,  President, 
Galvin  Manufacturing  Corp. 


NOTICE! 

To  RADIO  TODAY'S  subscribers 
who  are  waiting  for  their  1938-1939 
RADIO  YEAR  BOOK: 

Because  of  the  many  changes  in  the 
manufacturing  branch  of  radio  there 
has  been  a  delay  in  the  completion  of 
the  current  RADIO  YEAR  BOOK 
which  includes  the  official  radio  trade 
directory.  The  YEAR  BOOK  is  now 
in  production  and  will  be  mailed  to  sub- 
scribers within  the  next  2  or  3  weeks. 

RADIO  TODAY 
480  Lexington  Avenue  New  York,  N.  Y. 


JOBBERS 


*  Stewart  Warner  has  an- 
nounced that  a  new  factory  branch 
will  be  opened  at  1001  York  St., 
Indianapolis,  Ind.,  to  serve  the  en- 
tire state  of  Indiana.  It  will  oper- 
ate under  the  name  of  Stewart- 
Warner  Distributors  Co.,  will 
occupy  a  part  of  the  new  SW  fac- 
tories in  Indianapolis,  and,  com- 
plete with  a  big  service  department 
and  display  quarters,  will  distrib- 
ute both  radios  and  refrigerators. 
Appointed  sales  manager  for  the 
new  firm  is  Fred  Ahroecker,  a 
highly  successful  executive  who  for 
the  past  two  years  has  been  sales 
manager  for  Central  Distributing 
Co.,  former  SW  jobbers  in  the  area. 

*  Majestic  Radio  &  Television 
Corp.,  Chicago,  recently  announced 
the  appointment  of  two  new  exclu- 
sive distributors  on  the  West  Coast. 
In  the  San  Francisco  area,  Majestic 
products  will  be  distributed  by  the 
well-known  George  H.  Eoerhard  Co. 
Watson  <£-  Wilson  will  act  as  Ma- 
jestic distributors  in  the  Los  An- 
geles area. 

+  Announcement  has  been  made 
by  John  Meek,  president  of  Voca- 
graph  Sound  Systems,  that  com- 
plete stocks  are  now  available  at 
ten  distributing  centers,  including 
Atlanta,  Ga.;  Los  Angeles,  Calif.; 
San  Francisco,  Calif.;  Gardner, 
Mass. ;  New  Orleans,  La. ;  Kansas 
City,  Mo.;  Miami,  Fla. ;  Pittsburgh, 
Pa.;  Norfolk,  Va.;  and  Baltimore, 
Md.  He  states  that  upon  comple- 
tion of  this  plan,  a  sound  dealer  or 
distributor  will  be  able  to  secure 
any  model  in  the  Vocagraph  line 
within  24  hours. 

+  Radio  and  refrigeration  en- 
gineer— Radio  Today  has  just 
learned  that  one  of  the  best  known 
radio  and  refrigeration  engineers 
in  the  industry  is  now  available. 
He  has  been  identified  with  the  in- 
dustry for  many  years,  occupying 
important  executive  posts.  Any- 
one interested  can  reach  him  by 
addressing  Box  199,  care  of  Radio 
Today. 


It's  true,  what  they  say  about  Dixie  Radio  Co. — they're  in  a  good  mood.  Ben 
Krell,  head  man,  and  Earl  Beaudry,  sales  manager  of  the  Columbia,  S.  C,  jobber 
firm  are  standing  at  the  left.  In  the  front  row  you'll  recognize  Charles  Golen- 
paul,  Aerovox  sales  manager.  Earl  Dietrich,  of  Raytheon  Production  Corp., 
snapped  the  picture  on  his  recent  trip  south. 


58 


Radio  Today 


*  In  recognition  of  notable  work 
among  jobbers,  L.  K.  Wildberg, 
president  of  The  Radiart  Corp., 
Cleveland,  has  announced  that  Ken- 
neth C.  Burcaic  will  now  he  sales 


j 

«    <*-- 

m$ 

■ 

fejS- 

"Ken"  Burcaw  of   Radiart 

supervisor  for  the  firm  throughout 
the  western  part  of  the  country. 
"Ken"  was  cited  for  good  work  in 
"soldidifying  Radiart's  distribution 
of  its  vibrators  and,  in  a  whirlwind 
campaign,  establishing  leading  job- 
ber outlets  for  the  company's  1938 
line  of  auto  aerials."  He  was  re- 
cently married. 


*  L.  L.  Kelsey,  Stewart-Warner 
manager  radio  division,  has 
announced  the  appointment  of  Bur- 
well  Calahan  as  special  representa- 
tive on  auto  radios  with  head- 
quarters in  Detroit,  at  15501  Wood- 
row  Wilson  Ave.  Mr.  Calahan  is  a 
veteran  in  radio  and  for  the  past 
three  years  served  as  manager  of 
the  radio  division  of  United  Mo- 
tors Service,  and  previously  At- 
lanta branch  manager  for  General 
Motors  Radio.  He  brings  a  back- 
ground of  more  than  15  years  ex- 
perience in  radio. 

*  James  J.  Davin,  popular  sales 
executive,  has  been  appointed  vice- 
president  in  charge  of  sales  of  the 
Detrola  Corp.,  with  headquarters  at 
Detroit.  "Jim"  Davin,  as  he  is 
known  to  thousands  of  jobbers  and 
dealers  from  coast  to  coast,  needs 
no  introduction  to  the  trade,  for 
he  has  been  identified  with  radio 
and  allied  activities  for  more  than 
20  years.  Recently  he  was  sales 
promotion  manager  of  the  General 
Household  Utilities  Corp.,  and  there 
is  no  phase  of  merchandising  or 
sales  promotion  that  is  not  an  open 
book  to  the  new  Detrola  vice-presi- 
dent. According  to  the  plans  of 
"Jack"  Ross,  president  of  Detrola, 
the  company  will  sponsor  an  in- 
tensive campaign  to  build  up  a 
nation-wide  jobber  and  dealer  or- 
ganization for  Detrola  radio  re- 
ceivers and  refrigerators,  under 
the  direction  of  "Jim"  Davin. 


eXOBs- 


Now  is  the  Time 

to  Install  the  New 
"MULTICOUPLER" 
ANTENNA  SYSTEM 

Live  wire  radio  men  are  get- 
ting into  the  new  field  of 
installing  master  aerials  dur- 
ing the  dull  season. 

Master  antennae  are  not 
limited  to  apartment  build- 
ings. Private  residences  offer 
a  big  fielJ. 

Install  the  new  all-wave, 
noise  reducing  antenna  sys- 
tem, employing  our  latest 
developments. 

Get  in  on  this  business  now. 
We  furnish  standard  instal- 
lation specifications  free.  If 
you  have  a  particular  prob- 
lem, let  us  help  you.  Write 
NOW  for  complete  details. 


^.ja,=> 


<S,©_$D 


ANY,  ACEVES  &  KING,  Inc. 

11  West  42nd  Street,  New  York,  N.  Y. 

Consulting  Engineers  —  Specialists  in 
Antenna  Systems  —  Licensor  of  leading 
set  and  antenna   equipment  manufacturers. 


An  Amazing  Improvement 
in  Electrolytic  Condensers 


l\ 


T~\TJMONT  engineers  produced  and 


patented  the  world's  first  elec- 
trolytic condenser  in  common  use  to- 
day. Same  engineers,  after  five  years' 
research  now  produce  FIRST  SUPER 
HIGH  VOLTAGE  Electrolytic.  Re- 
heals  if  overloaded  or  punctured. 
This  patented  feature  is  found  only  in  DUMONT 
Condensers.  Used  by  U.  S.  Government — a  real  test 
of  quality.  Used  in  highest  priced  radio  receivers, 
yet  sold  at  very  attractive  price.  Try  some  today  and 
be  convinced.     FULLY  GUARANTEED  for   1  YEAR. 

Manufactured  by 


UMONT  ELECTRIC  CQJnc. 

514-516  Broadway,  New  York  , 

WRITE     FOR    CATALOGUE 
AND  NAME  OF  NEAREST  JOBBER 


IT'S  TH€  JHEDSIDt  ?ADIO 
FHATtS  8£OK€N 


Customers   don't 

like  to   pay   big   money   to   repair 
small  inexpensive  sets.    All  you  can 
charge  is  cost  plus  a  small  profit  for  this  type 
work.     You  can't  afford  to  come  back  to  make  good 
a   job   failure.      Use   dependable   Ward  Leonard   Replace- 
ment   Parts    that    stand    up    and    keep    your   job    profits. 

WARb'LEONARD'ELECTRiCCdi 

40  SOUTH  STREET,  MOUNT  VERNON,  N.  Y. 
Please  send  me  Circular  507. 

Name     

Address    

City    State    

Jobber's   Name    


April,  1938 


59 


■-•  •■■  ■■    ,  . ■-         ■•    ■•        •  ■■-■•■■■■    .-.  ■■ 


Cash   in  on  Changers 

for  Good  Profits 
INSTALL   THIS   UNIT 

GETTING  business — and  good  busi- 
ness —  with  radio-phonograph  combi- 
nations, is  all  the  reason  you  want  for 
using  General  Industries  Record-Changer 
Units.  You'll  find  them  highly  satisfac- 
tory  profit   makers. 

Ready  assembled,  easy  to  install, 
General  Industries  Changer  Units  en- 
able you  to  price  your  sets  in  the  popu- 
lar bracket  that  brings  steady  demand. 
Self-starting  governor-controlled  Flyer 
Motor.  Simple,  accurate,  dependable, 
foolproof  changing  mechanism. 

Order  a   Sample  for  Testing 

Model  "M."  latest  improved  type,  plays 
and  changes  eight  10-inch  or  seven  12- 
inch  records.  Model  "K"  plays  and 
changes  seven  10-inch  records,  plays 
12-inch  records  changed  by  hand.  Please 
specify  exact  voltage  and  frequency  of 
current  you   use. 

^Genemal  Imjusimes  CO. 

3838  Taylor  Street,  Elyria,  Ohio 
GENERAL  Changers  Sell  Mere  Sets 


ANY  MOVIE  STARS  AMONG 
YOUR  CUSTOMERS? 

*  As  a  big  help  to  merchan- 
disers of  home  movie  outfits,  Uni- 
vex  is  taking  part  in  a  national 
Home  Movie  Test,  along  with 
Warner  Bros,  and  Picture  Play 
Magazine.  Screen  tests  in  Holly- 
wood will  be  awarded  to  those 
home  movie  fans  who  enter  the 
best  8  mm.  film  of  themselves, 
shown  in  various  poses.  Consola- 
tion prizes,  75  of  them,  will  also 
be  awarded.  Judges  will  be  Bette 
Davis  and  Errol  Flynn,  working 
with  Warner  Bros,  executives. 


GIANT  BLUE  PRINT 

+  A  counter  display  for  the 
Ward  Leonard  antenna  change-over 
relay  is  being  furnished  to  jobbers 
and  dealers  free,  from  company 
headquarters  at  Mt.  Vernon,  N.  Y. 
The  6x9  card  is  done  in  "blue 
print"  style  with  white  lines  show- 
ing the  circuit  hook-up,  and  provi- 
sion is  made  for  the  user  to  mount 
his  own  relay  from  stock. 

MONSTER  CARTONS 

■*  Giant  display  cartons,  exact 
replicas  of  the  Tung-Sol  radio  tube 
containers,  are  now  offered  to  deal- 
ers for  showroom,  counter  or  win- 
dow trim  use.  These  are  repro- 
duced in  full  color,  and  they  come 
from  Tung-Sol  Lamp  Works  (radio 
tube     division),     95     Eighth     Ave., 


Newark.    N.    J.,    or    from    jobbers. 

Also  a  metal  sign  lithographed  in 

five  colors  and  coated  with  Deluxe 


varnish  is  being  offered  to  dealers 
by  Tung  Sol.  The  sign  is  17  x  11 
inches  and  has  a  punched  flange 
for  mounting;  it  features  tube  test- 
ing and  is  illustrated  with  tubes. 


MAKING        ^wirtiG 
HISTORY 


A\* 


WITH  A  FULL-SIZED 
UNIT  THAT  SELLS 
AS  LOW  AS   ...  . 

$175 

•    Your     customers     don't 
want     inefficient     air-condi- 
tioning.      Better    not    sell 
any    unit   tha^i    sell    an    un- 
satisfactory    one.      Because 
Koolroom     is     a     5-purpose 
air    conditioner    it    should 
be    your    choice    to     build 
your   air   conditioning   busi- 
ness.    For   in   one   complete 
unit    we    give    you    an    air 
conditioner     that     is     plus 
powered    ...    to   cool,    to 
dehumidify,  to  ventilate,  to 
clean   and   to   circulate   air. 
There    are    nine    models    in 
the    Koolroom    line   from    a   1/3   ton    capacity 
model   at  $175.00  to  a   5-ton   capacity   model 
at    $1350.00    (prices    slightly    higher    west    of 
Rockies).        Write    today    for    the     Koolroom 
franchise    in   your   community. 

KOOLROOM     division 

of  Indian  Products  Corporation 

2342-D    INDIANA    AVE.  ■  CHICAGO.    U.S.A. 

Cable    "Trailco   Chicago" 


TYPE  TL 

DYKANOL 
FILTER 
CAPACITORS, 


CORNELL- 
DUBILIEE 


60 


Radio  Todav 


TECHNICAL  LECTURES  — 

An  Outstanding  Program  Arranged  by  a  Special  Com- 
mittee of  Radio  Servicemen  of  America!  Speakers  of 
National  Prominence  Will  Discuss  Subjects  of  Vital 
Interest  and  Importance  to  Radio  Servicemen. 
A  Committee  of  the  Chicago  Section,  IRE,  is  Planning  an 
Engineering  Session. 

BUSINESS  SESSIONS  — 

WEDNESDAY,  June  8  —  10:00  a.  m. 

Board    of    Directors,    Radio    Servicemen    of    America 
THURSDAY,  June  9  —   10:00  a.  m. 

Sales  Managers  Club 

The  Representatives 

National   Association   of   Radio   Parts   Distributors. 


PERSONAL  SERVICE  BUREAU  -■ 


Let  Our  Personal  Service  Bureau  Handle  Your  Perplexing 
Problems!  We  Will  Make  Hotel  Reservations  for  You, 
and  Will  Give  Information  about  Stores,  Theaters  and 
Amusements,  Points  of  Interest  in  and  around  Chicago, 
Broadcasting  Stations,  and  Finally,  Arrange  Your  Depar- 
ture by  Train,  Plane,  Bus,  or  Auto. 

Also,  Let  Our  Personal  Service  Bureau  Make  Your  Show 
Registration  Now  to   Avoid  the  Last  Minute  Rushl 

RADIO  MUSEUM  DISPLAY  — 

Three  Big  Show  Cases  Filled  with  more  than  150  Pieces 
of  Old-Time  Radio  Apparatus!  Most  of  this  Exhibit, 
Collected  by  McMurdo  Silver,  Will  Be  Sent  to  the  Smith- 
sonian Institution  in  Washington,  D.  C,  After  It  Is  Dis- 
played at  the  Parts  Show. 


Already  A  Bigger  Show  Than  Last  Year! 

THE    ONLY    EXHIBITION    OF    RADIO    PARTS    AND    ACCESSORIES   IN    1938 
Sponsored    by    RADIO    MANUFACTURERS     ASSOCIATION     and     SALES     MANAGERS     CLUB 

and  operated  by 


Radio  Parts  Manufacturers  National  Trade  Show 

53  West  Jackson  Boulevard Chicago,  Illinois 


April,  1938 


61 


SKY-CHIEF 

announces 

•  Fewer   models — Higher   list    prices 

•  Longer   discounts   for   profitable   sales 


OUTSTANDING  VALUE    S14^ 

«   Model  38-1 — Powerful  5  Tube  Set 

•  Handsome  two-toned  Air-Flow  walnut 
veneer  cabinet  covered  in  Fabricoid — 
Blue,    Green,    Red,   White 

•  Natural  Tone   Dynamic    Speaker 

•  Gold  color  illuminated  5-in.  tuning  dial 

•  Works    on    either    AC    or    DC    current 

•  Self-contained  aerial 

•  Beam  power  audio   output 

DISTRIBUTORS    and     DEALERS— write 

for  catalog  and  wholesale   prices 

on  complete  line. 

SKY-CHIEF    RADIO    CORPORATION 
44  West  18th  St.        New  York,  N.  Y. 


MUSTABLE  R£fP®l#* 

...  made  poiiiftle  fry 

THE  ACOUSTIC 
COMPENSATOR 


^Higher  or 
lower  pitch 
with  the 
some  micro- 
phone. 


With  the  flip  of  a  finger  you  can  now  (11  lower 
or  raise  the  response  of  the  microphone.  .  .  (21 
adjust  the  microphone  /or  most  desirable  re- 
sponse tor  close  talking  or  distant  pickup.  .  . 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment. 

MODELS  RBHk,  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  11000  cps,  output, 
-65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable $42,00  LIST 

NEW  LOW-PRICED  CONTACT  "MIKE" 

ModelSKH (hiimpl.SKL (200ohms)  $12.00 LIST 

MODELS  RAH-HAL,  excellent  for  speech  and 

music.  Reduce  feedback $22.00  LIST 

Write  for  Complete  Illustrated  Bulletins  and 

Valuable  Sales  Helps. 
A  unrntrr  /?     561  BROADWAY,  N.  Y. 

rKMPEKlTC.   10.  CabUi  Addict*  Allcem.  Now  York 


TRADE  FLASHES 


*  Walter  A.  Coogan,  export  man- 
ager for  Hygrade  Sylvania,  returned 
recently  from  a  3-months  business 
trip  to  15  commercially  important 
countries  on  the  continent  where 
radio  tubes  are  sold.  Mr.  Coo- 
gan, a  top  figure  in  export 
circles,  reports  improved  prospects 
for  European  business  during  the 
rest  of  the  year,  although  trading 
has  been  hurt  by  munition  spend- 
ing, unstable  governments,  general 
jitters  and  a  business  recession.  He 
reports  Scandinavia  to  be  the  bright 
spot  abroad.  Mr.  Coogan  noticed  a 
tendency  in  imports  toward  quota 
systems,  and  otherwise  observed 
that  television  development  was 
slow  except  in  London. 

*  W.  W.  Watts,  vice-president 
of  Wincharger  Corp.,  Sioux  City. 
Iowa,  gives  an  optimistic  report  on 
farm  radio  business:  "We  can  very 
definitely  confirm  the  fact  that 
rural  trade  has  not  been  as  ad- 
versely affected  by  the  business 
recession  as  has  city  business.  We 
have  not  laid  off  a  single  person 
from  our  factory  or  office  and  are 
running  at  almost  the  same  capac- 
ity we  were  during  the  middle  of 
the  winter.  Contrary  to  reports  I 
get  from  many  other  businesses, 
our  business  during  March  on  all 
units  is  considerably  ahead  of  last 
year." 

*  The  Addison  Radio  Mfg.  Co., 
Inc.,  manufacturer  of  automatic 
tuning  units  for  both  home  and 
auto-radio  sets,  is  building  up  a 
nation-wide  organization.  Adolpli 
Blanc,  identified  with  radio  for 
many  years,  is  president  of  the 
company,  and  Frank  O'Hara,  who 
has  been  an  active  figure  in  radio 
for  a  long  time,  is  general  sales 
manager.  John  Koppel,  60  E.  42nd 
St.,  New  York,  representative  of 
the  company,  is  establishing  many 
important  sales  outlets  for  the 
company's  products. 

*  The  Burgess  Battery  Co.  has 
elected  Dan  W.  Hirtle  president 
and  Dr.  C.  F.  Burgess  chairman  of 
the  board  of  directors  at  a  recent 
annual  meeting  of  the  board. 


*  Joe  Gerl,  president  of  Sonora 
Radio  &  Television  Corp.,  Chicago, 
has  just  announced  appointment  of 
Don  31.  Fetterman  as  chief  engi- 
neer of  Sonora  radio  division.  Mr. 
Fetterman  is   well   known   in  engi- 


Mr.  Fetterman  joins  Sonora 

neering  circles,  possesses  extensive 
experience  in  the  field  of  radio  de- 
sign. He  was  formerly  with  Con- 
tinental Radio  &  Television  Corp., 
and,  prior  to  that,  with  the  Wells- 
Gardner  Co.,  both  of  Chicago.  Un- 
der the  vigorous  leadership  of  Pres- 
ident Gerl,  a  veteran  in  radio,  So- 
nora has  just  acquired  extensive 
new  quarters  and  is  actively  en- 
gaged in  the  production  of  its  new 
1939  models.  A  complete  line,  in- 
cluding bakelite  midgets,  table  and 
console  models,  farm  and  auto  re- 
ceivers, is  projected  and  will  be  re- 
leased shortly.  Engineer  Fetter- 
man promises  unusual  new  fea- 
tures in  operating  and  circuit  de- 
sign. Dominant  emphasis  will  be 
placed  on  tone  quality  and  power 
output,  to  uphold  Sonora's  slogan 
of  twenty-four  years'  standing — 
"Clear  as  a  Bell."  Unique  cabinet 
designs  have  been  worked  out  and 
are  already  in  production.  First 
models  will  be  released  early  in 
April,  with  the  complete  line  prom- 
ised shortly  thereafter. 

•  D.  R.  Bittan  Sales  Co.,  Inc.. 
manufacturers'  representatives,  have 
moved  to  new  offices  at  53  Park 
Place,  New  York.   N.   Y. 


AHPEPJTE   ^ 


MICROPHONE 


EPENDABLE 


RADIO 


TUBES 


62 


Radio  Today 


*  John  8.  Oarceau  has  been 
named  advertising  and  sales  pro- 
motion manager  for  Crosley  Radio 
Corp.,    according    to    an    announce- 


Crosley  names  John  Garceau 

ment  by  executive  vice  president 
Lewis  M.  Crosley.  Mr.  Garceau  has 
been  an  advertising  executive  since 
1921,  and  has  performed  ably  in  key 
positions  in  the  radio,  appliance  and 
air  conditioning  fields.  For  the  past 
two  years  he  has  been  advertising 
and  sales  promotion  manager  for 
the  radio,  home  laundry  and  refrig- 
eration divisions  of  Fairbanks- 
Morse,  and  is  now  regarded  as  one 
of  the  most  widely  known  execu- 
tives in  the  industry. 


Mr.  Goldberger  of  Precision 


*  H.  T.  Roberts,  vice-president 
and  sales  manager  of  the  J.  P.  See- 
burg  Corp.,  Chicago,  has  just  an- 
nounced that  C.  T.  McKelvy  will 
direct  all  sales  activity  of  the  See- 
burg  Radio  Corp.,  a  subsidiary.  At 
present,  Mr.  McKelvy  assists  Mr. 
Roberts  in  the  sales  division  of  the 
parent  firm,  which  now  enjoys  the 
largest  volume  in  its  history,  run- 
ning over  100  per  cent  ahead  of  last 
year. 

Very  soon,  Seeburg  Radio  will  in- 
troduce a  new  radio  development 
announced  as  having  revolutionary 
acoustical  and  design  features.  The 
new  product  will  get  the  same  in- 
tensive promotion  which  has  made 
Seeburg  products  leaders  in  the 
coin-operated  field  for  nearly  40 
years. 

C.  T.  McKelvy  needs  no  introduc- 
tion to  the  radio-music  industries, 
having  been  associated  with  a  num- 
ber of  top  firms  in  the  field  for  over 
20  years.  He  has  developed  excep- 
tional knowledge  of  manufacturing, 
marketing  and  trade  cooperation, 
which  insures  his  notable  success  as 
a  Seeburg  executive. 

*  T.  B.  Weaver  has  joined 
Parris-Dunn  Corp.,  Clarinda,  Iowa, 
to  head  a  new  department  recently 
organized  by  the  company  to  man- 
ufacture and  sell  Pres  Kloth.  The 
new  product  is  a  cotton  fabric 
specially  designed  so  that  house- 
wives may  give  a  professional 
steam  press  to  clothing  and  fabrics 
of  all  kinds.  Mr.  Weaver,  after 
long  research  and  experiment,  de- 
veloped Pres  Kloth. 

+  Added  to  the  staff  of  Preci- 
sion Apparatus  Corp.,  821  E.  New 
York  Ave.,  Brooklyn,  N.  Y.,  is 
Gerald  N.  Goldberger,  as  engineer 
in  charge  of  research  and  new  prod- 
ucts development.  He  has  been  a 
technical  consultant  for  Precision 
for  the  past  year  and  a  half,  and 
has  had  a  wide  experience,  for- 
merly, in  the  broadcasting,  televi- 
sion, sound  picture  and  medical 
fields. 

*  Earl  L.  Hadley  has  been  ap- 
pointed manager  of  the  advertising 
and  sales  promotion  dept.  of  the 
appliance  division  on  Fairbanks, 
Morse  &  Co.,  according  to  general 
manager  W.  Paul  Jones.  For  sev- 
eral years  Mr.  Hadley  was  advertis- 
ing   director    for    Grigsby-Grunow, 

(To  page   64) 


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mended by  the  largest  manufacturers  of  sound 
apparatus — in  use  in  all  countries  of  the  world — 
Send  for  price  and  data  bulletins  13-1,  13-25. 


Janette  manufacturing  Company 

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Reasonable  Prices. 
A  model  for  EVERY  car. 
Rustproof  Monel  Metal. 
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Zinolyte  Plating. 
Licensed  &  Manufactured 
under  Patent  No.  105067. 


Sales    Offices   in   all  Principal    Cities 
For    descriptive     list     price     folder,     see 
your  nearest  jobber  or  drop  us  a  postal. 

• 

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Complete 
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SIZES 

350  to  5000 

WATTS 


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Operating  A.C.  Radio,  PUBLIC  AD- 
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and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Sys- 
tems, Refrigerators,  all  Household  Ap- 
pliances for  FARMS,  CAMPS,  LAKE 
HOMES,  or  STANDBY  SERVICE.  For 
use  anywhere  Power  Line  Current  is 
not  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C.,  6,  12,  32  and  110  Volt, 
D.C.  as  well  as  Combination  A.C.-D.C. 
Units.  Anyone  can  Operate.  COM- 
PLETE, READY  TO  RUN. 

IT  WRITE  FOR  DETAILS  ON  DEALERS'  71 
L  PROPOSITION   AND  TERRITORY  if 

D.  W.  ONAN  &  SONS 

S90  Royalston  Ave.,   Minneapolis/   Minn. 


April,  1938 


63 


JIM 
GUAM 

& 


JhWJ 


SOW'     {   0* 


"»»*«'  SPa< 


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.up    W  .he  ^ce     vno*1™  „A   *a 


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w\:  e\iw-  m  *»'■  rf  s*"";0  wu™. 


ti»* 


QUAM-NICHOLS  CO. 

33rd  PlaCe  &  Cottage  Grave         1674  Broadway 
CHICAGO  NEW  YORK 


SPEAKERS 


Everything  you  need  in  radio.  It's  all  in  this 
new  RADOLEK  RADIO  PROFIT  GUIDE. 
Every  repair  part  for  every  receiver.  Newest 
radio  receivers.  New  1938  model  public  address 
amplifiers,  outputs  for  5  to  100  watts.  New 
model  public  address  speakers.  Test  instruments. 
Technical  books.  Special  equipment.  Leading 
standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 

And  everything  under  one  roof.  You  get  what 
you  want  promptly,  and  exactly  what  you  want. 
Radolek's  immense  stock  plus  Radolek's  efficient 
organization  insures  you  fastest  service.  25,000 
service  men  depend  on  this  service  and  benefit 
by  Radolek's  lowest  prices.  Send  now  for  your 
copy  of  Radolek's  Radio  Profit  Guide.  It  will 
help  you  make  more  money. 

RADOLEK---1 

601  W.  Randolph.  Chicago,  Dept.  D-18 

Send  me  the  1938  Raliolek  Radio  Profit  Guide  FREEl 


Name    

Address     

Serviceman?  □        Dealer?  □         Experimenter?  □ 


■    Earl   Hadley   goes   to   FM 

(From  page  63) 

More  recently  he  has  been  an  exec- 
utive of  the  Chicago  agency,  Henri, 
Hurst  &  McDonald,  Inc.,  handling 
Fairbanks-Morse  appliance  adver- 
tising. 

R.M.S.  RADIO  COURSE 

*  That  the  radio  industry,  and 
the  men  in  it,  could  profit  from 
radio  education  is  the  belief  of  Rob- 
ert F.  Herr,  manager  of  Philco's 
parts  and  service  division,  and  is 
also  the  prime  reason  for  the  special 
course  in  radio  education  for  deal- 
ers and  servicemen  announced  this 
week  by  Philco  in  conjunction  with 
the  Radio  Manufacturers'  Service 
and  the  National  Radio  Institute. 

This  course  in  modern  radio  the- 
ory and  practice  was  especially  de- 
signed for  people  engaged  in  the 
radio  industry,  and  is  open  to  the 
27,000  dealers  and  servicemen  affil- 
iated with  Philco  and  Radio  Manu- 
facturers' Ser\;ice. 

This  course  in  radio  education  is 
being  offered  at  a  price  about  one- 
half  the  regular  cost.  To  make  the 
offer  even  more  appealing,  there  is 
given  with  the  course  at  no  extra 
charge  the  new  Model  044  Philco 
Audio  Signal  Generator. 

Commenting  on  the  motive  be- 
hind such  an  unprecedented  offer 
for  radio  study,  R.  F.  Herr  said: 
"The  radio  industry  for  some  time 
has  been  conscious  of  a  need  among 
many  servicemen  for  a  more  thor- 
ough knowledge  of  basic  radio  prin- 
ciples. 

"The  complicated  radio  circuits  of 
today  and  the  approach  of  television 
in  the  future  present  to  these  ser- 
vicemen a  problem  which  can  be 
solved  only  by  a  definite  and  super- 
vised course  of  study." 

The  course  is  primarily  designed 
for  three  types  of  persons  in  radio 
work:  (1)  the  type  of  serviceman 
who  was  once  well-grounded  in  ra- 
dio theory,  but  who  has  grown 
rusty  and  become  out  of  touch  with 
new  developments;  (2)  the  type  of 
serviceman  whose  only  radio  knowl- 
edge has  been  gained  from  his  prac- 
tical work  and  who  has  little  or  no 
understanding  of  basic  radio  prin- 
ciples; (3)  the  dealer  and  salesmen 
who  will  find  that  they  are  better 
equipped  to  sell  their  wares  when 
they  more  fully  understand  what 
they  are  selling. 


•     INDEX     • 

TO  ADVERTISEME 

NTS 

Page 

ADDISON    RADIO    MFG.   CO.,    INC 

.53,  56 

AMERICAN    MICROPHONE   CO.,    INC... 

....   49 

AMPERITE    CO 28 

,  50,  62 

AMY,  ACEVES   &   KING,    INC 

....   59 

ATLAS  SOUND    CORP 

....    50 

B0GEN    CO.,     INC.,    DAVID 

....   47 

BROWNING    LABS.,    INC 

56 

CENTRALAB    

54 

CHICAGO    SOUND    SYSTEMS    CO 

....    50 

CINAUDAGRAPH    CORP 

Cover  III 

COMMERCIAL    CREDIT    CORP 

6 

C0MUN-A-PH0NE    SYSTEMS,     INC 

47 

CORNELL-DUBILIER    ELEC.    CORP 

....    60 

CR0SLEY    RADIO    CORP 

4 

DAVIES   CO..    HARRY    

....   57 

DUM0NT    ELECTRIC    CO.,    INC 

....   59 

ELECTRONIC     DESIGN     CORP 

4S 

GALVIN    MFG.    CORP 

Cover  IV 

GENERAL    ELECTRIC    CO 

Cover    II 

GENERAL    INDUSTRIES   CO 

....   60 

HYGRADE   SYLVANIA   CORP 

....  21 

INTERNATIONAL    RADIO    CORP 

52 

INTERNATIONAL    RESISTANCE    CO... 

....   58 

JANETTE    MFG.    CO 

....   63 

JOHNSON    MOTORS    

2 

KEN-RAD   TUBE   &    LAMP   CORP 

....   62 

K00LR00M    DIV.,    INDIAN    PRO.   CORP 

60 

MALL0RY  &  CO.,    INC.,    P.    R 

....     1 

0NAN    &    SONS,    D.    W 

....   63 

0PERADI0    MFG.    CO 

41 

PARRIS-DUNN    CORP 

....   53 

PHILCO   RADIO   &  TELEV.   CORP.,  Tub 

Div.     5 

PREMAX  JIV.,  CHISHOLM-RYDER  CO., 

INC.  55 

PRESTO    RECORDING    CORP 

....   55 

QUAM-NICHOLS    CO 

....   64 

RADIO    CORP.    OF  AMERICA 

....     7 

RADIO   PARTS  SHOW    

....   61 

RADOLEK                 

64 

3 

RCA   MFG.   CO.,   INC.,   Comm'l  Sound.. 

....   39 

RCA   MFG.   CO.,   INC.,   Radiotron   Div. . 

....   19 

RCA   MFG.  CO.,   INC.,   RCA-Victor  Div. 

17 

REGAL   AMPLIFIER    MFG.    CORP 

....   48 

SKY-CHIEF     RADIO     CORP 

....   62 

TH0RDARS0N    ELEC.    MFG.    CO 

45 

63 

TRANSDUCER    CORP 

47 

TRANSFORMER    CORP.    OF    AMERICA. 

....   43 

TRAV-LER  RADIO  &  TELEV.  CORP... 

....    55 

TRIPLETT  ELEC.   INSTRUMENT  CO... 

....   57 

TUNG-SOL    LAMP   WORKS,    INC 

51 

UNIVERSAL   CAMERA   CORP 

52 

UNIVERSAL    MICROPHONE    CO.,    LTD. 

47 

UTAH    RADIO    PRODUCTS   CO 

51 

50 

WARD    LEONARD    ELEC.    CO 

59 

WEBSTER-CHICAGO     

27 

WEBSTER    ELECTRIC   CO 

37 

WESTON    ELEC.    INSTRUMENT   CORP.. 

25 

WHOLESALE    RADIO   SERVICE    CO.,    1 

«...   49 

insure 

against 

change 

index. 

While    every    precaution    is    taken    to 
accuracy,      we      cannot      guarantee 
the     possibility     of     an     occasional 
or  omission   in  the  preparation  of  this 

64 


Radio  Today 


alt 


| Memorial  tower  chirns  reerv 
ing  installation 


fore- 


Pe/imGMe^Mcu24iet£<ne&kefrl 


[An  elaborate  installation  on 
private  estate 


|  Church  using  organ  and  tower] 
chimes  reenforcement 


jf55^T " 


lere's  the  best  sales  ammunition  you  could  have  to 
help  you  sell  sound  equipment.  In  America's  great 
cathedrals,  in  gymnasiums,  skating  rinks,  private 
estates,  on  sound  trucks  and  many  other  locations 
where  sound  amplification  is  used,  you'll  find  Cinauda- 
graph  Permanent  Magnet  Speakers.  (See  illustrations 
for  several  outstanding  Cinaudagraph  installations). 

That  tells  you  what  Cinaudagraph  performance  is  like! 
That  explains,  better  than  all  the  claims,  better  even 
than  a  list  of  construction  details,  why  it's  easy  to  sell 
Cinaudagraph  Speakers.  The  line  is  complete  (5  to  8 
inch),  the  line  is  compefifively  priced,  the  line  SELLS. 

Wherever  you  find  sound  at  its  best  today,  you  will  also 
find  Cinaudagraph.  Get  in  on  the  extra  profits  to  be 
had  from  the  specified  line  of  speakers.  Write  for  inter- 
esting literature  that  tells  why  you  can  make  MORE 
MONEY  selling  Cinaudagraph  Permanent  Magnet  and 
Electro-Dynamic  Reproducers. 


CINAUDAGRAPH 
COR    P    O    R    A    T    I    O    N 

SPEAKER    DIVISION  ...  STAMFORD,  CONN. 
EXPORT  DEP'T...100  VARICK  ST.,  N.  Y.  C. 


^Mctclciu 


* INVITES  COMPETITIVE 
COMPARISON.. 


AMERICA'S! 
FINEST 
AUTO  RADIO 


?™®® wi 

■"HP*""' 


A* 


oT,!f.O  HA* 


-IK* 


>39 


*  AUTOMATIC  TUNING  ...    Can  be  set 

for  any  number  of  stations. 

CONTROLS  .  .  .  that  Fit  into  the  Instrument 
Panel  and  Match  the  Styling  of  Any  Car  at  no  extra 
cost. 

*  STABILIZED  CIRCUITS  . . .  ah  i - 

mer  Condensers  and  Coils  are  completely  stabilized 
against  Temperature  or  Humidity  Drift,  instead  of 
relying  on  Broad  Tuning  to  eliminate  drift. 

ir    ft   Til  RF^ 

WDCO  ...  to  provide  the  Sensitivity 
absolutely  essential  for  satisfactory  Auto  Radio  per- 
formance. 


Model  "8-40"  Motorola 


*  3  GANG  CONDENSER  . . .  with  Tuned 

RF  Stage,  which  increases  Sensitivity,  improves  Selec- 
tivity, rejects  tweets,  birdies,  and  Code  interference. 

riVITY   .   .   .      Equal     to    the    highest 
priced  auto  radio  (1  Microvolt  for  1  Watt). 

*    SELECTIVITY   .  .  .   10    KC    separation    with 
no  cross  talk. 

*  TONE  and   SENSITIVITY  CONTROL 

*  61 2    ELECTRO-DYNAMIC  SPEAKER 


Custom,  Panel  Coritko£f 

w„         £r Match  Ail  Ca*4 

"Ai '  — SELL  THE  RADIO  PEOPLE  WANT  TO  BUY! 


GALVIN  MANUFACTURING  CORPORATION  •  CHICAGO 


adio's  TUNE-UP  TIME  is  Here 

In  the  home  — in  the  store 


G-E  Radio  shows  the  way  again  with  the  most  PRECEDENT- BREAKING  and  SALES -COMPELLING 
features  in  our  history.  More  Value  •  More  Features  •  New,  Powerful  Advertising  •  Sales-making  Promo- 
tions •  and  a  Great  Merchandising  Plan;  providing  a  Generous  Profit  Opportunity  for  Dealers  Everywhere. 

WATCH  FOR  ANNOUNCEMENT  OF  DEALER  PREVIEW  SHOWING 
FROM    YOUR    GENERAL    ELECTRIC    RADIO    DISTRIBUTOR 


GENERAL®  ELECTRIC 


time/; 


ALL 

the  information 
on  every  phase  of 


/ 


do. 


*>?*/ 


lUTOMATIC  TUNING  f^f 


\^m 


RESISTORS    ' 

/  /      f 

AUDIO 

DISTRIBUTION 


AUi)IO 

AMPLIFIER 

DESIGN  &  USE 


,_,,. 


AUDIO 
DEGENERATION 


alignment 

reactance  charts 


TRANSFORMERS 


ANTENNA 
DESIGN 


TUBE 
CHARTS 


CONDENSERS 


CONTROLS 
\ 


All  In  the 

\econd  ■**■•■ 

MALLORY-YAXLEY 

Radio  Service 
Encyclopedia 

Any  radio  service  engineer  who  intends  to  stay  in  business 
will  vitally  need  this  Second  Edition  MYE  to  guide  him  in 
the  solution  of  Automatic  Tuning  problems.  It  gives  final 
answers  to  every  question  you  ever  had  on  Automatic  Tun- 
ing .  .  .  not  on  one  system  but  on  every  system.  And  it's  just 
one  section  of  the  Second  Edition  MYE.  Information  never 
before  published  ...  on  Alignment  with  the  use  of  the 
Oscilloscope  for  "high  fidelity"  servicing  ...  on  Audio 
Degeneration  and  the  modernization  of  old  type  receivers. 
New  Tube  Charts  .  .  .  with  all  about  every  make  and  type. 
AND  THAT'S  ONLY  THE  BEGINNING! 


17.000  Receivers  Analyzed!- 


5000  more  than  the  First  Edition  MYE  . . .  336  pages  packed 
with  substantiated  radio  service  data  ...  so  beautifully  organ- 
ized ...  so  concise  ...  it  will  give  you  split-second  reference 
to  everything  a  service  engineer  wants  to  know  ...  in 
one  book  ...  on  one  page  ...  on  one  line. 

You'll  pay  for  your  copy  with  the  extra  profit  on  the  first 
job  for  which  you  use  it  .  .  .  and  show  an  extra  profit  on 
every  succeeding  job.  Your  distributor  can  supply  you  .  .  . 
but  remember  his  supply  is  limited. 

P.  R.  MALLORY  &  CO.,  inc.,    INDIANAPOLIS,  INDIANA 

Cable  Address  — PELMALLO 


RADIO  TODAY,  May.  1938,  Vol.  IV,  No.  5,  published  monthly  by  Caldwell-Clemcnts,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription  yearly 
$1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24,  1936,  at 
the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,   1879.   Printed  in   U.S.A.   Member  of  A.  B.  C.   Copyright    1938  by   Caldwell-CIements,   Inc. 


1,000,000  More  Prospects 
Now  Can  Afford 

LABYRINTH  RADIO 


^^1 

KS  1 1 

■^■f  i 

1».                 n 

Vs.""'' 

1   ~I 

^        M 

mjl 

. 

T934 


a  radical  development,  the 
'"■'•'  ■  Acoustical  Labyrinth,  came 
from  Stromberg-Carlson  Laboratories  to  startle 
the  radio  world  with  new  tone  quality.  The 
first  set  with  this  revolutionary  _  ._.. 
advance,    the  No.    70,   sold    at  *lyj^uu 


1. 1935 


so  general  was  recognition 
of  the  superiority  of  Laby- 
rinth Tone,  that  the  Labyrinth  was  placed  in 
many  moreStromberg-Carlsonmodels.lt  was  dis- 
covered also,  how  to  use  it  in  a  smaller  cabinet. 
The  lowest  priced  Labyrinth  Cf%  n  c  flfl 
set  that  year,  the  No.  84,  cost    *285U 


I  J  w  J  Q  the  fame  of  Stromberg-Carl- 
In  <    «J  \J   SQn  "Labyrinth  Xone"  had 

spread  so  widely  that  the  larger  factory 
production  it  called  for  brought  down 
the  price  sharply.  A  "Labyrinth" 
Stromberg-Carlson,  the  No.  M  A_cn 
145-L,     could    be    had     for    *19#aU 


|  I  w  «  X  "'Labvrinth"  Tone  was  fas- 
^  *^  #  cinating  radio  buyers  every- 
where. With  no  other  method  was  it  possible 
to  get  bass  notes  without  "boom";  freedom 
from  false  sounds  from  the  back  of  the  speaker. 
Again  larger  output  lowered  m^  q  tffeCfl 
the   price,   the  No.   1.40-M,  to    'lO™ 


1  NvJVv  the  glorious  tone  which  only  the  Labyrinth 
can  give,  is  within  the  means  of  almost  everyone 
who  is  ready  to  buy  a  new  radio.  What  a  chance 
for  a  Stromberg-Carlson  dealer  to  do  business  this 
season  ...  at  the   new  prices  of  "Labyrinth"  radio! 

STROMBERG-CARLSON    TELEPHONE    MFG.    CO.,    ROCHESTER,    N.    Y. 


cyhereidnothmq 
finer  than  a 


Cuban 


J 


Radio  Today 


.  ..m 


'km 


SEASONS  come  and  seasons  go.  New  lines  are  intro- 
duced .  .  .  new  developments  are  presented  .  .  .  new 
sensations  are  launched.  But  all  the  year  round  .  .  . 
tubes  keep  wearing  out  ...  radio  owners  must  buy  new 
ones  .  .  .  and  that's  what  makes  every  month  a  good 
month  for  the  dealer  who  concentrates  on  Philco  Tubes! 

To  the  millions  who  have  bought  Philco  Radios  and 
enjoyed  the  perfection  of  Philco  performance  ...  no 
other  tube  but  one  bearing  the  Philco  name  will  ever 
be  considered.  To  millions  of  owners  of  other  radios 
.  .  .  the  prestige  of  the  Philco  name  carries  enormous 
weight  when  replacement  time  comes  around. 

And  with  the  coming  of  Summer  .  .  .  when  radio  tubes 
are  beginning  to  show  the  effects  of  long -continued 
use  during  the  Winter  .  .  .  there's  a  real  opportunity 
for  the  dealer  with  a  stock  of  Philco  Tubes  complete 
enough  to  take  care  of  the  replacement  sales  the  season 
makes  inevitable. 


TJvi  Suk&tTuJel  puttee  Wot/ct  fa Selt 


C^WH> 


'0U44C£4>t#    a 


NEW 


CROSL 


REFRIGERATORS  TO  FIT  TODAY'S  PURSES! 


Crosley  makes  it  in  the  great 
new  million  dollar  plant  at 
Richmond,  Indiana,  where  low 
costs  of  manufacture  give 
America  the  greatest  refriger- 
ator value  of  all  time ! 

Crosley  makes  it  sturdy — 
makes  it  efficient,  makes  it  a 
thing  of  beauty  and  an  article 
of  service ! 

Crosley  makes  it  with  the 
famous  SHELVADOR  so  that 
the  easy,  handy  storage  of  small 
food  items  on  the  convenient 
shelves-in-the-door  makes 
more  usable  room  for  foods  than 
in  ordinary  refrigerators. 

This  new  line  gives  Crosley 
dealers  a  powerful  weapon  for 
mail  order  house  competition — 
for  obsolete  model  competition 
and  for  chiselling  tactics  that 
creep  into  selling  in  these  times. 

Crosley  tools  up  for  a  new  line 
in  the  middle  of  the  season — 
the  first  manufacturer  to  do 
so.  New  factory  efficiency  and 
economies  make  this  possible  I 

Crosley  dealers  now  have  their 
distinct  Shelvador  selling  ad- 
vantage further  strengthened 
and  its  lead  lengthened  by  this 
NEW  line  at  its  LOW  PRICE. 


"Standard"  and 
"DeLuxe"SHELVADORS 

still  the  world's  best 
refrigerator  values 

Crosley  dealers  now  have  a 
complete  Shelvador  line  to 
meet  every  demand  and  price. 
Step-up.  Why  sell  last  year's 
models  when  you  can  now  be 
ahead  of  all  competition  with 
NEXT  YEAR'S  models  at  less 
(ban    last    year's    price   levels? 


THE      CROSLEY      RADIO 


CORPORATION 

Radio  Today 


I  7  w  V    ffgatewt  cine " 

SHELVADORS 


New  Sealed   Electrosaver 

It  saves  you  money  BECAUSE  IT 
RUNS  INFREQUENTLY  AND 
USES  LITTLE  ELECTRICITY 
WHEN  IT  DOES. 

Even  greater  savings  are  now  de- 
veloped in  the  famous  Electrosaver 
sealed  refrigerating  unit  which  re- 
duces operating  costs  to  a  new  and 
welcomed  low.  Sealed  in  oil  for  a 
lifetime  of  performance  it's  powered 
to  deliver  plenty  of  ice  and  suffi- 
cient refrigeration  regardless  of 
weather.  Silent  as  a  cat — as  con- 
stant in  its  duty  as  a  strong  heart! 
It's  quality  all  the  way — at  prices 
folks  can  pay. 


— with  matchless  economy  of  operation, 
— with  new  savings  in  electric  current, 
— with  heretofore  unattained  efficiency! 

A  TRIUMPH  OF 

CROSLEY  engineering;  CROSLEY  economies;  CROSLEY 
new  factory;  CROSLEY  determination  to  give  the  world 
the  most  refrigerator  for  its  money! 

SAVE   MONEY   IN  OPERATION 

SAVE  FOOD  and  STEPS  and  CASH  with  the  SHELVADOR! 

This  is  the  refrigerator  EASIEST  to  sell  to  women.  Because 
it  is  the  handiest.  The  SHELVADOR  saves  you  steps  ami 
enables  you  to  store  food  so  much  easier  and  conveniently. 
Little  things  like  fruit  and  eggs  and  cheese  go  on  the  shelves 
in  this  door  to  leave  free  the  space  on  regular  shelves  for 
bulky  items,  big  bowls  and  such.  This  clever  shelf  planning 
enables  you  to  actually  get  more  food  into  the  Shelvador. 
Leftovers  won't  get  lost  in  the  Shelvador  Refrigerator.  You 
keep  them  right  in  sight  on  the  handy  shelves.  You  don't 
keep  the  door  open  for  long  because  there's  no  need  to  do 
a  trunk -packing  act  after  each  meal — nor  must  you  explore 
and  search  for  things  hiding  on  backs  of  shelves.  That 
saves  money  by  saving  electric  power. 

Crosley  freezing  control  enables  you  to  get  exactly  the  right 
degree  of  cold  you  need  to  preserve  food  properly,  without 
waste  of  electricity.  Foods  are  not  frozen  and  ruined  in  cold 
weather — nor  spoiled  from  insufficient  refrigeration  on  hot  days. 
Meats  stay  fresh  for  days.     Milk  stays  sweet  hours  longer. 


Music    while    you    work 

Women  miss  no  more  favorite  pro- 
grams because  culinary  duties  keep 
them  in  the  kitchen.  Radio  built 
into  the  new  "Regular"  Shelvador 
— same  quality  and  performance  as 
available  in  the  standard  and  deluxe 
lines.  In  the  new  "Regular"  line 
the  radio — a  five-tube  superhetero- 
dyne— is  built  at  the  bottom. 

Women  like  the  feature  of  radio  in 
their  refrigerator  because  it  is 
always  handy — adds  a  smart  note 
to  their  kitchen — and  adds  a  note 
of   cheer    to    household    drudgery. 

*Delivered  and  installed.  5-year 
protection  plan  $5  extra. 


CINCINNATI 

May,  1938 


POWEL  CROSLEY,  Jr.,   President 

Home  of  "the  Nation's  Station"     WLW— 70  on  your  dial 


ADVANCE   INFORMATION 

ON    THE    GREATEST    RADIO 

INVENTION    IN    10    YEARS 


HARRY  BOYD   BROWN 

National  Merchandising 
Manager  0/  Philco 


WITHIN   the  next   10   days,  Philco  will  introduce  a 
radio  invention  so  new — so  different — so  mysterious 
— so  sensational  that  it  is  even  greater  than  anything  you 
can  possibly  imagine. 

This  amazing  Philco  development  is  almost  as  unbelievable,  as 
uncanny  as  radio  itself  was  20  years  ago.  Everybody  should  have  it. 
Everybody  will  want  it.  Anybody  can  use  it,  and  it  clicks  with  the 
prospective  customer  the  very  instant  it  is  seen. 

Yes,  it  will  absolutely  sweep  the  American  buying  oublic  off 
its  feet.  Everybody  will  want  to  watch  it  -work.  Everybody  will 
want  to  try  it.  And  the  demonstration  of  it  will  positively  pack 
your  store  with  floor  traffic— with  prospects. 

It  is  such  a  marvelous  thing  that  outside  salesmen  can  now  make 
home  demonstrations  anywhere  they  care  to  call.  In  fact,  it  is  so 
good  that  the  outside  salesman  will  actually  get  "choosy"  as  to  where 
he  wants  to  demonstrate.  No  one  can  resist  its  mystery  and  fascina- 
tion. 

In  addition,  this  Philco  Radio  invention  is  so  intensely  interest- 
ing— so  almost  incredible — that  it  makes  the  greatest  advertising 
copy  ever  written.  And  as  a  window  display,  nothing  ever  before 
has  even  remotely  approached  it. 

Naturally,  it  will  obsolete  radio  receivers  by  the  millions 
because  this  Philco  engineering  development  will  bring  a  comfort, 
a  convenience  and  pleasure  to  radio  users  beyond  their  dreams  and 
their  imagination.  It  is  something  that  will  sell  regardless  of  gen- 
eral business  conditions. 

In  conclusion — the  details  of  this  great  Philco  invention  must 
remain  a  secret  for  about  10  more  days.  However,  I  felt  that  you 
should  have  some  advance  information  on  it  so  that  you  can  use  good 
judgment  in  your  present  radio  purchases — because  during  this 
coming  Season — good  times  or  bad — the  radio  dealers  who  concen- 
trate on  Philco  will  do  a  thriving  radio  business. 


Fmttc 


^r^^^*5'^^ 


Radio  Today 


©C1B    379058 


Staff— 

Darrei.l  Bartee 
G.  H.  Mavorca 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton  K.  Ulricii 


Vol.  IV.  No.   5 


Orestes  H.  Caldwell 
Editor 


M.  Clements 
Publisher 


Copyright  1938 

Cald well-Clements,    Inc. 

480   Lexington  Ave. 

New  York,  N.   Y. 

Tel.  PLaza  3-1340 


Member  Audit   Bureau  of   Circulations 


BIG  DOINGS  AT 
CHICAGO,  JUNE  7-11 

For  the  biggest  huddle  in  many  a 
year,  all  radio  interests  will  take  time 
out  in  June  and  like  it. 

Tentative  programs  for  the  annual 
RMA  convention  June  7-8,  and  the 
National  Radio  Parts  Trade  Show- 
June  8-11  have  been  announced.  The 
Chicago  radio  schedule  for  the  Stevens 
Hotel  looks  like  this: 


8:00 
10:00 


— IRE   Engineering 
— Exhibits  close 


Session 


00  a.m.- 
30 


oil 


JUNE  7 
RMA    Board    of    Directors 
RMA      Sound      Engineers 
Committee 
30  p.b. — RMA    Membership    Lunch- 
eon 

Registration,  National 
Radio    Parts   Trade   Show 
RMA  Set  Division 
RMA  Tube   Division 
RMA     Parts     and     Acces- 
sories Division 
RMA  Amplifier  and  Sound 
Equipment   Division 
"Radio     Special"     train 
leaves  New  York 

JUNE  8 
9:00  a.m. — Show   registration 
10:00  — RSA  Board  of  Directors 

12:15  p.m.— RMA     Credit     Committee 

Luncheon 
12:30  — New    RMA   Board   Lunch- 

eon.   Election  of  officers. 


2 

00 

— Show  opens 

2 

00 

—RMA    Volume    Control 
Committee 

7 

00 

— RMA      Annual      Industry 
Banquet 

8 

00 

—RSA  Technical  Session 

0 

00 

— Exhibits  close 
JUNE  9 

9 

00  a.m 

— Show    registration    opens 
Radio     Industries     Golf 
Tournament 

0 

00 

— Meetings,  Sales  Managers' 
Club  with  National  Radio 
Parts  Trade  Show 

2 

00  p.m 

— Exhibits  open 

7 

00 

— RSA  Technical  Session 

8 

00 

— Sound  Equipment  Sympo- 
sium 

8 

00 

— IRE   Engineering   Session 

0 

00 

— Exhibits  close 

JUNE  10 

9:00  a.m. — Show  registration  opens 

2:00  p.m. — Exhibits  open 

7:30  — RSA  Technical  Session 


JUNE  11 
10:00  a.m. — RMA    Service    Section. 
Western  Division. 
00  p.m. — Exhibits  open 
30  —RSA  Technical  Session 

00  — Session   on   the   "Phasma- 

jector"  in  Television 
9:30  — Show  closes 

SELLING  RADIO  SERVICEMAN 
TO  PUBLIC 

Three  times  during  the  month  of 
May  nation-wide  broadcasting-  hookups 
will  be  used  to  remind  the  listening- 
public  to  call  in  the  nearest  radio  ser- 
viceman to  put  radios  in  shape  for 
the  big  summer  broadcast  features 
ahead.  As  outlined  on  following 
pages,  these  "Spring  Tune-Up"  broad- 
casts by  O.  H.  Caldwell,  editor  of 
Radio  Today,  will  point  the  need  for 
correct  antennas,  fresh  tubes,  parts 
replacements,  and  interference  elimi- 
nation. They  are  scheduled  as  fol- 
lows: 


"Spring  Tune-Up"  Broadcasts 

May  9.  11  P.M.,  E.D.S.T. 

WEAF  and  NBC  Eed  Network 
May  13,  4  P.M.,  E.D.S.T. 

WABC  and  CBS  Network 
May  27,  7:45  P.M.,  E.D.S.T. 

WJZ   and   NBC    Blue   Network 

Another  step  to  sell  the  importance 
of  the  radio  serviceman  to  the  gen- 
eral public  was  the  full-page  P.  K. 
Mallory  &  Co.  advertisement  in  April 
Fortune.  "The  radio  service  engineer 
is  quite  a  fellow,''  says  the  text.  "He 
has  to  be.  .  .  .  The  radio  has  become 
such  a  part  of  the  personal  life  of 
millions  that  interruption  of  recep- 
tion has  all  the  earmarks  of  a  house- 
hold calamity — a  calamity  which  de- 
mands instant  correction.  Maintain- 
ing America's  receiving  sets  in  top 
notch  running  order  is  'in  itself  '  a 
gigantic  industry.  It  consists  of  two 
parts ;  the  thousands  ot  skilled  service 
men  and  the  replacement  parts  manu- 
facturers who  back  them  up  with 
products  and  service."  Copies  were 
sent  to  radio  men  for  posting  in  their 
windows. 


'SPRING  TUNE-UP"— PLACES  TO  LOOK  FOR  INTERFERENCE 


-DIRTY    INSULATORS 


BROKEN 
SOCKET   i 


DEFECTIVE 
SPLICE 


'4- BROKEN 
LEAD-IN 


OVERHANGING 
BRANCHES 


CORRODED  CONNECTION 
l|/      AT  LEAD-IN  STRIP 

il 

—  INSIDE  WIRE  BROKEN 

h SHORTED 

j  LICHTNINC  ARRESTOR 

^CORRODED  OR  RUSTV 
GROUND  CONNECTION 


DEFECTIVE 
APPLIANCES 


May,  1938 


AUTO  MODELS  TO  BE  RADICALLY 
CHANGED,    WHY  NOT  RADIOS? 

The  automobile  makers  of  the 
United  States  are  known  to  have  their 
designers  feverishly  at  work  develop- 
ing radically  different  models  for  the 
1939  ears — designs  which  will  effec- 
tively make  obsolete  all  cars  now  in 
use  or  in  stock.  Upon  this  strategy 
the  auto  makers  are  depending  to 
boost  1939  sales! 

Taking  this  as  his  theme  before  the 
RMA  directors  at  New  York  April  21, 
Commander  E.  F.  McDonald,  Jr., 
president  of  Zenith,  urged  that  radio 
manufacturers  adopt  a  similar  policy 
and  bring  out  a  wholly  different  type 
of  radio,  to  obsolete  all  present  sets. 

At  the  request  of  Eadio  Today, 
Commander  McDonald  has  restated 
his  views  on  the  matter  of  radio-set 
styling  as  put  before  the  EMA : 

Women's  wear,  furniture 

"The  manufacturers  of  ladies'  hats, 
coats,  suits  and  dresses  would  do  only 
a  fraction  of  the  business  they  now 
do  if  it  were  not  for  the  fact  that  they 
consistently  and  continually  change 
the  style.  This  applies  also  to  the 
manufacturers  of  furniture,  lighting 
fixtures  and  automobiles,"  comments 
Commander  McDonald. 

"The  automobile  people  have  done 
an  excellent  job  of  styling  bodies, 
fenders,  general  outlines — streamlin- 
ing, if  you  please.  They  thereby  put 
an  obvious  imprint  on  the  current  line 
they  are  producing,  automatically  ob- 
soleting  all  earlier  models.  In  my 
opinion  more  people  buy  new  automo- 
biles because  their  old  car  looks  out- 
of-date  than  because  of  the  fact  that 
it  is  worn  out. 

"Now  let's  stand  in  front  of  the 
mirror  and  watch   our  own  industry 


Robert  Shannon,  vp  and  gm  of  RCA 

Manufacturing    Co..    has    been    named 

to   board    of   directors. 


go  by,"  observes  the  '  Commander. 
"What  have  we,  the  radio  manufac- 
turers, done  in  styling  to  put  the  ob- 
vious imprint  of  age  on  the  older 
models?  Very  little.  The  last  major 
change  was  when  we  took  the  legs  off 
consoles  and  put  them  down  to  the 
floor.  It  is  true  we  have  introduced 
short  wave,  electric  tuning  and  auto- 
matic tuning,  but  these  are  not  ob- 
vious style  changes. 

Few  changes  in  radio 

"There  is  a  style  change  that  the 
radio  industry  can  make  —  a  style 
change  that  not  only  is  obvious  from 
appearance  but  has  real  utility  value. 
And  few  style  changes  have  this  added 
utility  feature. 


/*%  '"HI 


ARCTU 


Tenth  anniversary  of  quick-heating  tube  is  celebrated  by  Arcturus  officials: 
Engineer  Feindel,  gen'l  manager  J.  A.  Stobbe,  factory  sup't  A.  E.  Lyle,  and 
sales  manager  Jack  Geartner.     Quick-heating  saves  listeners  736,111  hours  daily, 

estimates  Jack. 

8 


"A  good  illustration  of  change  in 
style  which  also  added  utility  value 
was  the  change  from  the  old  type  of 
high,  big  front-wheel  bicycle  that  had 
the  little  wheel  trailing  behind,  to  our 
present-day  bicycle  which,  when  the 
style  change  came,  they  called  the 
safety  bicycle. 

"In  my  opinion  the  wall  type  of 
console  radio  is  a  monstrosity  that 
should  never  have  existed.  It  was 
originally  copied  from  the  old  type  of 
phonograph  and  we,  the  radio  manu- 
facturers, have  persisted  in  producing 
it  year  after  year.  The  radio  never 
belonged  against  a  .wall — it  belongs 
alongside  a  chair. 

Automatic  tuning 

"Automatic  tuning  has  double  the 
value  in  an  arm-chair  model.  Why? 
With  a  wall  type  of  radio,  even 
though  it  is  automatic,  if  you  are 
reading  you  must  stop  and  lay  down 
your  book,  walk  to  the  wall  and  touch 
the  button.  With  an  arm-chair  type 
of  radio  you  continue  your  reading — 
it  is  unnecessary  to  take  your  eyes  off 
the  book.  You  simply  reach  out — 
you  know  where  the  buttons  are — 
press  the  button,  there  is  your  change 
of  station.  So  I  say  that  this  change 
has  not  only  style  value  but  utility 
value.  I  have  found  no  one  who  has 
ever  owned  an  arm-chair  type  of  radio 
who  will  g-o  back  to  a  wall  type  of 
console. 

"Pride  of  possession  is  a  great  fac- 
tor, and  with  the  whole  industry  be- 
hind this  movement,  I  predict  that 
within  two  years  one  will  often  hear 
this  expression:  'Oh!  You  have  one 
•  of  the  old-fashioned  wall  type  of  ra- 
dio.' 

"Let's  take  a  page  out  of  the  auto- 
mobile manufacturer's  book,  follow 
his  example,  and  do  styling  that  will 
obsolete  early  models." 

RADIO  IN  COURT 

Penalties  have  just  been  imposed 
upon  two  New  York  manufacturers  of 
spurious  radio  sets.  These  are  the 
two  final  cases  to  reach  the  courts  as 
a  result  of  a  drive  against  retailers 
and  makers  of  counterfeit  receivers. 
One  maker  was  turning  out  200  sets 
a  week,  employing  20  persons.  Some 
sets  were  sold  with  spurious  labels  and 
about  5000  fake  labels  of  well-known 
names  were  found  in  stock.  In  cer^ 
tain  cases,  labels  and  sets,  were  de- 
livered separately  to  dealers,  who 
could  then  attach  the  most  popular 
labels  of  the  moment. 

Samuel  Solat,  whose  company  at 
690  Broadway  was  called  the  Radio 
Tube  Trading  Co.,  Inc.,  was  given 
$500  fine  or  thirty  days  in  jail,  along 


Radio  Today 


with  a  suspended  sentence  of  three 
months  in  the  workhouse. 

Edward  Ehrlieh,  doing  business  at 
16  Hudson  St.  as  the  Gilette  Radio 
Co.,  Inc.,  heard  the  judge  say  "$50 
fine  or  10  days  in  jail"  and  is  also  sub- 
ject to  a  suspended  sentence  of  30  days 
in  the  workhouse. 

Convictions  were  obtained  by  Ber- 
nard Phillips  of  the  New  York  law 
firm  of  Scandrett,  Tuttle  &  Chalaire. 

WHAT  A  TUBE  IS- 
DUMMIES  OUT! 

*  Dummy  tubes,  plug-in  resistors, 
ballast  tubes  and  dial  lamps  are  all 
excluded  from  the  definition  of  a  tube, 
just  approved  by  EMA.  Under  this 
definition  cathode-ray  tuning  devices 
may  apparently  be  counted  as  tubes. 
Here's  the  definition,  developed  by  a 
special  committee  of  which  Meade 
Brunet  was  chairman: 

"A  radio  tube  is  a  device  used  in 
radio  equipment  in  which  an  electric 
or  magnetic  field  causes  or  controls 
the  electronic  or  ionic  conduction 
through  a  vacuum  or  a  gas.  This  defi- 
nition shall  not  be  construed  to  in- 
clude dial  lamps  used  for  illumination 
only,  ballast  or  other  resistance  de- 
vices." 

WEEKLY  INDUSTRY  STATISTICS 

*  Prevention  of  over-production  of 
receiving  sets  is  the  major  object  of 
a  plan  adopted  by  the  EMA  board  of 
directors  at  its  meeting,  April  21,  to 
provide  for  exchange  between  EMA 
members  of  weekly  production  and 
inventory  statistics. 

The  statistics  project  was  planned 
by  a  special  committee  of  which 
Henry  C.  Bonfig  of  Camden,  New 
Jersey,  is  chairman,  and  including 
James  M.  Skinner  of  Philadelphia, 
James  S.  Enowlson  of  Chicago,  and  S. 
T.  Thompson  of  Long  Island  City, 
New  York.  Weekly  statistics  will  be 
gathered,  covering  factory  production 
periods  from  Saturday  morning 
through  each  Friday  night,  inclusive. 
The  statistics  will  include  figures  on 
weekly  sales  to  retailers;  wholesalers 
and  branch  inventory ;  factory  finished 
goods  inventory,  and  factory  ship- 
ments to  wholesalers  and  wholesale 
branches,  together  with  total  factory 
cabinet  commitments.  The  figures  will 
be  broken  down  into  four  groups :  elec- 
tric and  battery  operated  table  models, 
and  electric  and  battery  operated  con- 
sole models,  including  phonograph- 
radio  combinations.  Also  there  will  be 
separate  statistics  on  automobile  ra- 
dio, factory  shipments,  inventories, 
and  commitments. 


S.  N.  Shure,  president  Radio  Parts 
Manufacturers  National  Trade  Show- 
to  be  held  at  Chicago,  June  8-11. 


"FREE  RADIO" 

VS,  $5  TAX  ON  SETS 

*  "Canada  is  swinging  distinctly 
to  Government  ownership  of  broad- 
casting and  will  have  to  tax  listeners 
further  to  pay  for  new  stations  now 
building,"  reported  Linton  Wells, 
ECA's  roving  reporter,  addressing  the 
banquet  of  the  new  national  dealers 
association  at  New  York,  March  21. 

"Already  in  Canada  plans  are  being 
made  to  boost  the  listener's  license 
fee  to  $2.50  per  set,  for  each  radio  in 
the  home." 

"T£  such  government  ownership 
ideas  ever  gain  favor  in  the  United 
States,"  commented  Mr.  Wells,  "we'll 
probably  do  the  thing  in  an  even  big- 
ger way  with,  say,  a  $5  listener's  fee. 
Then  what  will  happen  to  the  busi- 
ness of  you  radio  dealers  and  service- 


men, if  every  householder  has  to  pay 
a  tax  of  $5  apiece  on  every  set  in  use, 
including  his  auto-radio ! 

"Then  indeed  you  and  millions  of 
listeners  will  appreciate  what  it 
means  to  have  radio  free,  as  we  have 
it  today." 

RADIO  DATES  AHEAD 
SPRING  CONVENTIONS 

May  19-21 — ECA  eastern  distributors 
convention,  Atlantic  City. 

May  22-26— National  Electrical 
Wholesalers'  Association  conven- 
tion, Hot  Springs,  Ya. 

May  26-28 — Philco  distributors  con- 
vention, Chicago. 

May  27-30 — Westinghouse  distribu- 
tors convention,  Hot  Springs,  Ya. 

May  31- June  1— Stewart  -  Warner 
western  distributors  convention, 
Chicago. 

June  2-4 — ECA  western  distributors 
convention,  French  Lick,  Ind. 

June  6-7 — Stewart  -  Warner  eastern 
distributors  convention,  Atlantic 
City. 

June  7-11 — EMA  convention,  Stevens 
Hotel,  Chicago. 

June  8-11— National  E  a  d  i  o  Parts 
Trade  Show,  Stevens  Hotel,  Chi- 
cago. 

June  8-11 — Sonora  display,  Black- 
stone  Hotel,  Chicago. 

June  9 — National  Association  of  Ea- 
dio  Parts  Distributors  conven- 
tion, Chicago. 

June  9 — "The  Eepresentatives"  meet- 
ing, Chicago. 

June  9 — Sales  Managers'  Club  meet- 
ing,  Chicago. 

June  16-18 — Institute  of  Eadio  Engi- 
neers convention,  New  York  City. 


Weston  executives  attend  Fiftieth  Anniversary  of  company's  founding  by  late  Dr. 

Edward  Weston.    H.  L.  Gerstenberger,  sales  manager;  W.  N.  Goodwin,  Jr.,  chf. 

elec.  engr.;  Edward  F.  Weston,  president;  E.  R.  Mellen,  treasurer;  and  Caxton 

Brown,  vice-president. 


May,  1938 


Radio  Today  leads  drive   to    put  listeners'  sets 
in  first-class  condition  for  big  summer  programs 


Ggj|  ^■■Sr^ 


it 


TUNE  UP 


SELL  UP 


Half  the  homes  in  your  town — half 
the  houses  along  the  streets  in  your 
territory — are  prospects  right  now  for 
sales  and  service — money-making  op- 
portunities opened  up  by  Radio  To- 
day's current  "Tune-up  —  Sell  up" 
campaign. 

During  the  past  winter  and  early 
spring,  ice  and  high  winds  have  im- 
paired antenna  efficiency;  tubes  have 
worn  out  and  need  to  be  renewed; 
vital  parts  of  radio  sets  have  "gone 
bad"  and  demand  replacement;  elec- 
trical appliances  and  wiring  are  caus- 
ing annoying  interference  to  listeners. 

Now  with  warm  weather  weakening 
radio  reception  generally,  these  de- 
fects are  showing  up  and  seriously 
affecting  radio  listeners  in  millions  of 
homes.  If  American  listeners  are  to 
be  able  to  hear  and  enjoy  fully  the 
big  summer  broadcasts  and  sports 
features  coming  on  the  air,  the  radio 
industry  and  radio  trade  must  help 
listeners  rehabilitate  their  home  in- 
stallations at  once — rendering  a  vital 
service  to  both  public  and  broadcast- 
ers, and  thereby  helping  to  pull  the 
radio  business  itself  out  of  the  reces- 
sion  doldrums. 

F/ve-fo/d  purpose 

Here  are  the  specific  aims  in  Radio 
Today's  nation-wide  "Tune-up — Sell 
up"  campaign : 

1.  Put   existing   radios   in   first-class 
condition. 

2.  Replace  antennas  and  tubes. 

3.  Eliminate    interference    sources. 

4.  Sell  modern  quality  radio  sets. 

5.  Get  more  radios  into  every  home. 
Radio  manufacturers  and  broad- 
casters are  cooperating  with  Radio 
Today  in  this  timely  drive  to  rebuild 
radio  sales  and  replacement  business, 
and  to  bring  greater  radio  enjoyment 
to  millions  of  listeners. 

Helping  in  this  campaign  to  reha- 
bilitate American  radio  listening,  the 
broadcasters    are    furnishing    nation- 


M 


wide  hook-ups  to  carry  the  "Tune-up" 
message  to  every  listener,  leaving  to 
the  radio  industry  itself  the  Sell-Up 
part  in  this  campaign. 

Nation-wide  hookups 

During  May,  over  coast-to-coast 
networks  comprising  hundreds  of  sta- 
tions, the  Tune-Up  message  with  prac- 
tical demonstrations  of  radio  troubles 
and  how  to  correct  them,  will  go  to 
millions  of  listeners  from  the  lips  of 
O.  H.  Caldwell,  editor  of  Radio  To- 
day, who  has  conducted  nearly  200 
similar  broadcasts  to  educate  listeners. 

These  broadcasts  are  scheduled  as 
follows : 

Monday,  May  9,  11  P.M.,  E.D.S.T. ; 
10  P.M.,  C.D.S.T.;  9  P.M.,  C.S.T.; 
7  P.M.,  P.S.T.:  NBC— WEAF  and 
Red  Network. 

Friday,  May  13,  4  P.M.,  E.D.S.T. ; 
3  P.M.,  C.D.S.T.;  2  P.M.,  C.S.T.;  12 
noon,  P.S.T.  :CBS.— WABC  and  CBS 
Network. 

Friday,  May  27,  7  :45  P.M.,  E.D.S.T., 
6:45  P.M.,  C.D.S.T.;  5:45  P.M., 
C.S.T.;  3:45  P.M.,  P.S.T. :  NBC— 
WJZ  and  Blue  Network. 

In  each  of  these  broadcasts,  listen- 
ers will  be  reminded  to  check  over 
their  home  radio  installations  to  see 
that  their  antennas  are  in  proper  con- 
dition, tubes  are  fresh  and  operating 
efficiently,  and  working  parts  in  their 
receivers  are  in  good  shape.  If  listen- 
ers are  having  trouble  in  getting  sta- 
tions or  are  suffering  annoyance  from 
interference  or  noise,  they  will  be  ad- 
vised to  call  in  the  nearest  radio  man 
to  fix  the  difficulty.  Electrical  inter- 
ference, often  so  baffling  to  the  aver- 
age listener,  will  be  explained,  and 
solutions  indicated  by  which  the  lis- 
tener can  have  his  radio  serviceman 
install  protective  filters  on  the  offend- 
ing electrical  appliance  or  put  up  an 
efficient  antenna  which  will  pick  clear 
signals  out  of  the  air  and  transmit 
them  unimpaired  to  the  receiver. 


Radio  Today 


The  theme  oi  these  various  broad- 
casts will  all  be  centered  around  the 
purpose  "Tune  Up  Your  Eadio  Now 
for  the  Big  Summer  Programs  Ahead 
—Tune  Up  Your  Set  for  1938  Effi- 
ciency." 

Each  broadcast  thus  becomes  a  per- 
sonal aid  for  you,  Mr.  Eadio  Man,  in 
your  servicing  and  sales  work.  It 
would  cost  $15,000  to  $20,000  to  put 
on  these  broadcasts,  but  through  the 
cooperation  of  the  broadcast  networks, 
the  broadcasting  stations  and  Eadio 
Today,  all  of  this  valuable  promo- 
tional effort  is  made  available  to  you 
without  cost.  On  the  dates  given  you 
have,  in  effect,  your  personal  broad- 
cast on  the  air,  telling  your  customers 
and  prospects  in  your  neighborhood 
about  your  service,  and  urging  them 
to  call  you  in  to  put  their  radios  in 
best  possible  shape  for  the  important 
summer  programs  ahead  —  news, 
sports  and  music. 

Tie  in  with  this  unique  effort  to 
build  business  for  you,  and  better 
listening  conditions  for  the  broad- 
casters' programs.  Use  your  window, 
your  advertising,  to  link  your  name 
with  the  Spring  Tune  Up  idea.  Tele- 
phone your  prospects  and  remind  them 
to  listen  in  to  the  next  broadcast  by 
Eadio  Today's  editor.  It  will  be  an 
indirect  selling  talk  and  sales  demon- 
stration for  the  very  services  and  mer- 
chandise you  have  to  offer. 

Sell  sets,  too 

Cruise  up  and  down  the  street  look- 
ing at  antennas,  ask  people  how  their 
sets  are  working — ask  if  they  are  get- 
ting as  clear  reception  as  they  en- 
joyed early  in  the  winter.  Explain 
how  a  poor  antenna,  and  worn-out 
tubes  will  cut  down  radio  efficiency — 
how  electrical  appliances  cause  inter- 
ference. Supplement  the  message  of 
the  broadcasts  with  practical  advice 
of  your  own,  based  on  local  conditions 
and  specific  experience  in  clearing  up 
neighbors'  radio  troubles. 

Use  these  service  calls  as  openings 
to  sell  new  sets.  For  no  listener  can 
really  enjoy  1938  reception  unless  he 
has  an  up-to-date  quality  receiver, 
capable  of  reproducing  the  full  range 
of  modern  music,  and  sensitive  enough 
to  pick  up  all  the  stations  he  wants 
to  hear.  Show  your  prospect  the  con- 
veniences of  modern  tuning.  Eemind 
him  that  really  convenient  listening 
requires  extra  radios  in  various  rooms 
— radios  for  the  bedroom,  kitchen, 
nursery,  sewing  room,  maid's  room, 
game  room,  workshop,  etc. 

Use  these  broadcasts  and  this 
Spring  Tune  Up  Drive  to  sell  not 
only  service  and  repairs,  receiver  ad- 
justment and  interference  elimina- 
tion— but   also  better   quality  receiv- 


ers and  extra  sets  for  other  rooms  in 
the  home.   "Tune-Up— Sell  up." 

Others  in  fine 

Other  industry  forces  are  cooperat- 
ing in  putting  on  better  reception  ef- 
forts during  May. 

At  Chicago,  a  cooperative  Better 
Eeception  Week  was  held  beginning 
May  2.    It  was  sponsored  by  the  Ea- 


LOOSE, RATTLING 
SPEAKER  GRILLE 


dio  set.  Over  the  winter,  when  radio 
listening  is  heaviest,  tubes  have  worn- 
out  and  loose  connections  may  have 
developed.  Poor  reception  is  most  apt 
to  happen  during  the  warm  months 
unless  the  radio  receiver  is  in  tip-top 
condition. 

"Spring  is  the  logical  time  for  a 
yearly  overhauling  of  radio  sets  and 
is  the  motivating  reason  behind  Eadio 
Tune-Up  Week." 


DUSTY 
CHASSIS 


DIRTY 

CONDENSER 


LOOSE   KNOBS 
LOOSE  OR  SLIPPING  DIAL 


TINNY  OR 

y  RATTLING 

SPEAKER 

NOISY  VOLUME  CONTROL 

ALIGNMENT  OF  I.F.  G  R.F.STAGES 

NOISY  &  WEAK  TUBES 


"SPRING  TUNE-UP"— SOURCES  OF  TROUBLE  IN  THE  RECEIVER 
When  called  in  to  put  the  radio  set  in  shape  for  the  big  summer  program  features 
ahead,  the  radio  man  will  want  to  check  over  carefully  the  points  above  enume- 
rated.   These  are  some  of  the  most  common  causes  of  poor  reception  originating 
within  the   radio  chassis   itself. 


dio  Servicemen's  Association,  Chicago 
Section,  and  by  local  broadcasting 
stations.  Messages  concerning  the 
campaign  were  carried  in  local  news- 
paper radio  pages  and  in  broadcast 
announcements. 

Meanwhile  Philco  announced  a  Ea- 
dio Tune-Up  Week  for  May,  and  is- 
sued radio  and  telephone  sales  pro- 
motions. 

Get  ready  for  summer 

"The  urge  for  'spring  cleaning'  can 
apply  to  radio  as  well  as  to  the  house- 
wife," declares  Henry  T.  Paiste, 
Philco  sales  engineer.  "The  advent  of 
spring  means  the  period  when  the 
house  gets  a  fresh  coat  of  paint,  the 
furniture  gets  new  covers  or  re-up- 
holstered, and  the  family  car  gets 
overhauled.  There  is  no  reason  why 
it  shouldn't  be  the  best  time  of  year 
also  for  overhauling  the  family's  ra- 


"DON'T  ASK  IF — ASK  WHICH!" 

"Never  ask  a  prospect  IF  he  wants 
to  buy  .  .  .  but  Which,  When,  Where 
and  How!  Always  give  him  a  choice 
between  something  and  something — 
never  between  something  or  nothing," 
advises  Elmer  Wheeler,  author  of 
"Tested   Selling  Sentences." 

And  "Watch  Your  Bark,"  Mr. 
Wheeler  adds. 

"Consider  how  much  a  little  dog 
can  express  with  just  one  word  and 
one  tail  to  wag.  What  he  can  do 
with  the  tone  of  his  'woof  and  the 
'wag1  of  his  tail  in  conveying  his 
many  messages  is  well  worth  emu- 
lating. 

"Watch  the  "bark'  that  can  creep 
into  your  voice.  Watch  the  'wag' 
behind  your  words.  Eemember,  it's 
as  much  in  the  way  you  say  it  as  in 
what  you  say." 


May,  1938 


11 


PULL  TOGETHER  TO  "SELL  UP!" 

Broadcasters  and  utilities  pitched  in  and  helped  radio  dealers 
Remarkable   results    from    California    cooperative   campaign 


*  THAT  cooperative  campaign  ef- 
fort can  be  made  to  produce  remark- 
able results  in  selling  radios  has  been 
proved  in  a  striking  way  by  Northern 
California  radio  dealers  and  the  local 
electrical  utility  company. 

Through  its  first  cooperative  radio 
campaign,  held  Oct.  11-30 — probably 
the  most  unique  and  successful  ever 
conducted  in  the  West — the  Electric 
Society  of  Northern  California  in- 
creased Fall  sales  to  a  new  peak.  So 
successful  was  it  that  the  plan  now  is 
to  make  such  a  Fall  drive  an  annual 
event.  During  the  20-day  period  of 
the  campaign,  13,639  radios  were  sold. 
Compare  that  figure  with  the  previous 
three-month  average  for  the  same 
number  of  days — only  8,337  sets — and 
the  following  three-month  average  of 
11,884  sets.  Benefits  definitely  carried 
on  far  beyond  the  limits  of  the  cam- 
paign. 

Costs  of  the  campaign  were  as  fol- 
lows: 

$17,579  of    radio    time    donated    by 
broadcasters. 
17,065  spent  by  utility  for  campaign 
advertising. 
4,462  donated  by  utility  for  society 
expenditures. 


$39,106  TOTAL 

Formed  four  years  ago,  the  Electric 
Society  extended  its  efforts  into  the 
radio  field  for  the  first  time  in  1937. 
Results  well  justified  the  effort.  While 
the  radio  campaign  was  financed  by 
the  Pacific  Gas  &  Electric  Company 
and  the  broadcasters,  it  was  primarily 
a  dealer  promotion,  worked  out  by 
representatives  from  all  branches  of 
the  business.  In  general,  plans  are 
mapped  out  by  a  large  committee 
made  up  of  representatives  from  all 
groups  involved  in  San  Francisco,  and 
of  the  officers  of  the  various  local 
units  of  the  Electric  Society.  Every 
town  in  the  large  territory  covered 
by  the  "P.  G.  and  E."  has  a  voice  in 
the  work.  Date  and  nature  of  the  cam- 
paign agreed  on,  the  Society's  adver- 
tising department  is  instructed  to 
draft  the  campaign  itself.  This  ma- 
terial is  then  submitted  to  the  So- 
ciety's board  of  directors  in  a  meeting 
also  attended — in  an  ex-officio  capacity 
— by  heads  of  the  local  units. 


Sell  "Hi-Fi" 

Featuring  the  slogan :  "You're 
There  in  Person  With  a  1938  High 
Fidelity  Radio,"  last  Fall's  campaign 
featured  quality  radios  from  the  fol- 
lowing three  standpoints : 

1.  Excellence  and  variety  of  today's 
programs. 

2.  Tremendous  progress  in  broad- 
casting technique. 

3.  The  necessity  of  having  a  new 
model  radio  for  enjoying  to  the  fullest 
extent  the  programs  on  the  air.  The 
importance  of  "selling  up"  was  em- 
phasized to  the  dealers. 

A  total  of  16  radio  stations  all  over 
Northern  California  joined  with  the 
rest  of  the  industry,  for  the  first  time, 
in  putting  over  the  merchandising 
message.  Each  station  donated  three 
announcements  a  day  during  the  cam- 
paign and  one  15-minute  program  a 
week.  The  utility  devoted  the  "com- 
mercial" phase  of  its  Sunday  program 
to  the  slogan  throughout  the  cam- 
paign. 

Newspaper  ads 

Colorful  movie  slides  carrying  the 
following  message  were  shown  in  115 
theatres  in  172  towns  for  two  full 
weeks :  "You're  There  in  Person  With 
a  1938  High  Fidelity  Radio.   During 


The    California    broadcasters    contrib- 
uted   time-on-the-air    equal    in    dollar 
value  to  the  utilities'  donation  of  news- 
paper  advertising. 


this  month,  your  dealer  will  arrange 
a   home  demonstration." 

Newspaper  advertising,  done  by  the 
utility  but  all  carrying  the  signature 
— "See  your  dealer  or  the  P.  G.  and 
E." — consisted  of  three  insertions  each 
in  285  daily  and  weekly  papers.  The 
ads  ran  60  inches  in  the  daily  papers, 
24  inches  in  the  weeklies.  Feature  il- 
lustrations showed  a  huge  microphone 
in  the  foreground,  a  background  com- 
posed of  famous  radio  personalities. 
Smaller  illustrations  featured  broad- 
casting station  improvements,  pre- 
cision tuning  in  new  models  and  the 
fact  that  local  stations  now  get  the 
nation's  best  programs.  Each  ad  also 
featured  in  a  bottom  box  a  prize  con- 
test on  "The  Electrical  Standard  of 
Living,"  in  which  a  $12,000  home,  an 
$8,000  home  and  ten  smaller  weekly 
prizes  are  awarded. 

Cooperative  displays  featuring  a 
complete  showing  of  high-fidelity  ra- 
dios featured  by  local  dealers  were 
used  by  the  P.  G.  and  E.  in  73  of  its 
offices. 

The  Society  furnished  dealers  and 
newspapers  with  free  mats  of  specially 
posed  photographs  of  radios,  as  well 
as  other  illustrations,  including  hand- 
lettering  of  the  campaign  slogan  in 
various  sizes.  A  mat  illustration  and 
a  postcard  order  blank — with  all  il- 
lustrations keyed  by  numbers  for 
simple  ordering — were  sent  to  every 
dealer  and  newspaper  in  the  territory. 
Literally  thousands  of  mats  were  used 
during  the  campaign. 

Printed  matter 

Also  sent  to  all  dealers  and  news- 
papers were  publicity  clip  sheets  pre- 
pared for  use  in  making  up  special 
pages  of  tie-in  advertising  on  the  ra- 
dio campaign.  A  further  series — in 
mimeograph  form — was  made  avail- 
able to  papers  needing  more  publicity 
than  it  was  possible  to  include  in  the 
clip-sheet. 

The  utility's  house  organ,  having  a 
circulation  of  550,000  consumers,  ran 
a  $50  prize  contest  for  the  best  essays 
on  radios  and  also  used  colorful  bill 
stickers  on  statements  sent  to  all  sub- 
scribers. The  stickers  carried  the  same 
"mike"  and  talent  illustration  used  in 
newspapers  and  display  cards. 


12 


Radio  Today 


The  dealer  display  cards,  which 
were  delivered  by  P.  G.  and  E.  dealer 
contact  men — providing  an  oppor- 
tunity for  enthusing  dealers  about 
the  campaign — used  the  newspaper  il- 
lustration in  color.  The  cards  were 
made  in  20  in.  x  30  in.  size  and  were 
equipped  with  easel  backs.  Thousands 
of  these  were  used. 

Advance  promotion  work  among 
dealers  helped  increase  effectiveness  of 
the  campaign.  Immediately  general 
plans  were  completed,  a  four-page, 
folder-type  letter  was  sent  out  to  the 
trade  by  the  Society,  explaining  the 
idea  behind  the  campaign  and  listing 
in  large  type  the  participants,  date, 
slogan  and  features.  This  was  fol- 
lowed up  shortly  by  a  broadside  giving 
full  details,  with  which  were  in- 
cluded sample  clip  sheets,  mat  illus- 
trations and  newspaper  ad  proofs. 
Form  letters  were  sent — in  advance- — ■ 
to  advertising  managers  of  all  news- 
papers. 


nationally  would  call  for  the  use  of 
$570,000  worth  of  local  newspaper  ad- 
vertising by  the  utilities,  $586,000 
worth  of  broadcasting  time,  and  $134,- 
000  for  dealer  promotion — or  $1,320,- 
000  total.  Kadio-set  sales  for  a  20-day 
national  campaign  would  figure  out 
at  455,000  receivers,  an  increase  of 
177,000  sets  over  normal.  "After- 
campaign"  stimulation  would  amout 
to  a  42  per  cent  increase  over  normal, 
and  if  extended  for  six  months  would 
mean  about  a  million  extra  sets  sold 
as  a  result  of  the  campaign,  at  a  re- 
tail value  of  $40,000,000.  Utility  in- 
come from  these  1,000,000  additional 
sets  would  be  $6,000,000  annually,  so 
it  would  make  a  pretty  good  invest- 
ment for  the  utilities,  as  well  as  for 
all  the  other  groups  of  the  industry. 

In  the  California  drive,  total  ex- 
penditures in  utility  advertising, 
broadcasting  time,  and  dealer  promo- 
tion,'taken  altogether, .  seem  to  have 
run  about  $1  per  set  of  increased  sales 


(or  11  cents  per  set,  spent  on  coopera- 
tive trade  promotion  alone),  which 
will  serve  as  a  yardstick  for  national 
estimates  of  results  to  be  expected. 

"SELL  UP"  WITH  A 
DEMONSTRATION  BOOTH 

To  demonstrate  quality  radios  or 
phonographs,  the  dealer  should  have 
a  separate  small  demonstration  room 
closed  in  with  walls  of  plywood  or 
wallboard.  Special  sound  insulating 
material  is  better,  but  is  not  neces- 
sary. 

The  ordinary  radio  listening  level 
is  about  40  db.  Street  noises  run 
from  70  db  to  90  db,  and  this  noise 
filtering  into  the  average  store,  pro- 
duces an  inside  noise  level  of  60  db. 
Inside  a  wallboard  booth,  this  noise 
can  be  reduced  to  30  db,  above  which 
the  40  db  radio  or  phonograph  can 
be  heard  satisfactorily. 


Push  home  demonstrations 

A  special  letter  carrying  the  sig- 
natures of  four  leading  dealers  was 
sent  to  all  dealers  in  the  territory  urg- 
ing them  to  feature  the  home  demon- 
stration idea  during  the  campaign. 
It  said  in  part: 

"We  realize  that  home  demonstra- 
tions, as  a  regular  practice,  have  been 
considered  undesirable  and  a  source 
of  profit  leak  and  that  steps  have  been 
taken  in  many  communities,  through 
mutual  agreement,  to  stop  the  prac- 
tice. This  is  very  desirable,  and  nor- 
mally should  not  be  deviated  from  in 
any  way,  but  in  view  of  the  remark- 
able support  being  given  the  cam- 
paign by  broadcasters  and  others,  and 
inasmuch  as  many  people  are  well 
satisfied  with  the  radio  they  have  and 
home  demonstration  is  the  only  means 
by  which  proof  can  be  given  that  new 
radios  are  different  and  will  do  things 
claimed  for  them,  it  does  seem  advis- 
able that  all  retail  dealers  advertise 
that  they  will  make  home  demonstra- 
tions during  this  campaign." 

It  was  recommended  that  such  dem- 
onstrations be  limited  to  high  fidelity 
radios  of  the  console  and  armchair 
types,  in  an  effort  to  "sell  up"  in  price 
brackets. 


National  results 

In  view  of  the  recent  discussion  by 
KMA  officials,  of  a  nation-wide  pro- 
motional campaign  for  radio,  it  is  in- 
teresting to  see  what  the  California 
results  would  mean,  applied  on  a  na- 
tional scale. 

The  California  area  involved  repre- 
sents about  3  per  cent  of  our  national 
sales  quota.  To  apply  the  local  figures 


YOU'RE  THERE  IN  PERSON  IF  YOU  LISTEN  IN 
ON  ONE  OF  THESE  1938  HIGH  FIDELITY  RADIOS 


Order 

Free  Mats 

of  Any  of  These 

Illustrations 

by  Number 

on  the 
Attached 
Postcard 


COPY 
SUGGESTIONS 

Electric  Appliance  Society  of  Northern  California 


1383  MARKET  STREET 


SAN  FRANCISCO 


TAILORED    AUTO-RADIO 


Motor  season  opens  for 
25,000,000  car  owners 


Millions  of  cars  are  being  backed 
out  of  garages  this  month,  to  spend 
the  summer  spinning  along  the  high- 
ways. This  is  a  move  which  the  radio 
dealer  must  set  to  music,  via  auto 
radio. 

Receiver  design,  which  is  sales- 
tailored  this  season  for  extra  per- 
formance and  convenience  is  a  matter 
that  commands  the  attention  of  the 
dealer  who  is  making  his  warm- 
weather  promotion  plans  for  car  sets. 

Who  designs  sets 

Since  many  automobile  receivers 
reaching  the  consumer  market  are  at 
one  time  purchased  by  the  car  manu- 
facturer or  his  dealers,  it  follows  that 
the  car  manufacturer  has  a  great 
deal  to  say  about  the  design  and  per- 
formance of  these  receivers. 

All  receivers  sold  under  contract 
to  the  car  manufacturers  are  designed 
jointly  by  the  engineering  depart- 
ments of  the  car  and  receiver  manu- 
facturers. Circuit  design  is  of  course 
pretty  much  the  province  of  the  re- 
ceiver engineer,  but  his  circuit  de- 
sign must  produce  the  performance 
set  down  jointly  by  the  merchandis- 
ing and  engineering  departments  of 
the  car  manufacturer. 

Details  of  receiver  dimensions,  lo- 
cation and  appearance  are  set  down 
by  the  motor  ear  engineer.  He  is 
the  very  important  design  coordinator 
who  can  bring  together  the  efforts  of 


the  body  designer  and  receiver  engi- 
neer toward  the  end  of  producing 
such  interrelated  devices  as  instru- 
ment panel  receivers  and  dash-vented 
speaker  installations. 

In  some  cases  receivers  built  on 
contract  are  installed  on  the  automo- 
bile assembly  line,  just  as  are  bump- 
ers, windshield  wipers,  headlamps, 
etc.  More  frequently  such  receivers 
are  installed  at  the  factory,  but  only 
on  special  order  and  after  the  cars 
have  come  off  the  line.  An  equal  or 
greater  number  are  installed  by  the 
dealer  at  the  point  of  sale  of  the  new 
car. 

Whereas  figures  for  1937  contract 
auto  radio  production  are  fairly  ac- 
curately known,  the  actual  number  of 
factory  installations  is  not  so  readily 
available.  A  rational  estimate  would 
be  160,000  sets,  or  a  percentage  rep- 
resenting factory  installation  of  13.9 
per  cent  based  on  a  contract  receiver 
production  of  1,150,000. 

The  total  production  of  independ- 
ent makes  of  receivers  would  mate- 
rially drop  the  13.9  per  cent  figure, 
since  all  of  these  are  dealer  installed. 

Demonstration  device 

An  example  of  how  new  designs 
may  be  brought  dramatically  to  the 
attention  of  the  buying  public  is  sup- 
plied by  one  of  the  manufacturers. 
The  procedure  is   described  thus: 

'"Motorists    who    have    been    accus- 


tomed  to  have  refreshments  served 
to  them  on  a  tray  at  wayside  lunch 
stands  are  being  given  a  new  treat  by 
automobile  servicing  stations  so  that 
they  may  be  entertained  by  radio 
while  having  their  ears  refueled,  oil 
put  in  the  crankcase,  tires  filled  with 
air,  or  any  one  of  a  number  of  simi- 
lar services. 

"The  Crosley  Radio  Corp.  devised 
this  novel  method  of  demonstrating 
how  easily  its  new  automobile  radio 
operates.  Two  simple  wire  brackets 
covered  with  rubber  where  they  touch 
the  car  door  hold  the  receiver,  and 
the  driver  presses  the  buttons  to  select 
the  program  desired. 

"Chances  are  that  the  idea  appeals 
to  them  so  well  that  an  order  is  given 
to  install  the  radio  on  the  spot.  Being 
a  completely  contained  unit,  it  is 
quickly  and  easily  attached  to  the 
dash  of  the  car,  and  the  driver  goes 
away  happy  with  the  added  joy  of 
radio  for  the  trip. 

"This  novel  sales  presentation  has 
the  advantage  of  enabling  the  driver 
himself  to  demonstrate  the  set  to  his 
satisfaction  in  his  own  ear  without 
the  annoyance  of  making  an  actual 
installation.  It  is  a  kind  of  self-sell- 
ing plan,  and  takes  advantage  of  the 
old  maxim  that  'seeing  is  believing,' 
with  the  addition  that  'hearing  is  also 
believing'  in  the  case  of  radio." 

START  SELLING  RADIOS 
FOR  VACATIONERS 

Window  displays  of  successful  mer- 
chants in  other  lines  are  usually 
bright,  colorful,  and  highly  seasonal 
in  nature.  Such  window  trims  usu- 
ally anticipate  by  a  couple  of  weeks 
the  approaching  season,  be  it  Easter, 
spring  planting,  house-cleaning,  or 
any  of  the  other  special  periods  dur- 
ing the  year. 

Why  can't  you  do  the  same?  Now 
is  just  the  time  to  start  plugging 
small  portable  sets  for  vacation  or 
travel,  in  addition  to  car  radios. 

Trim  a  vacation  window — get  a 
few  time-tables  and  maps,  some  sport- 
ing goods  or  vacation  equipment  and 
a  suit-ease  or  two,  use  these  in  con- 
junction with  a  good  showing  of 
small  receivers  along  with  carefully 
worded  signs.  To  further  carry  out 
the  idea  of  taking  a  midget  set  along 
on  the  vacation  trip,  fit  one  of  the 
small  sets  in  a  corner  of  an  open 
suitcase,  showing  how  easily  portable 
it  is.  Start  your  bid  for  vacation 
and  tourist  trade  now. 


While    car    stops    for    gas,    auto-radio 

demonstrator    is    hung    over    side,    so 

that    driver    can    try    out    push-button 

tuning    for   himself. 


Radio  Today 


WINDING  UP  THE  RADIO  RECESSION 

Promotion  ideas  to  put  dynamite  under  the  dealer's  sales  curve 


LISTS  NEWS  PERIODS 
ON  POSTCARD 

Many  people  like  to  follow  the  news 
broadcasts,  and  tune  from  one  sta- 
tion to  another  during  the  day,  to 
hear  the  news  of  the  world  unfold. 
But  such  listeners  usually  find  it 
difficult  to  locate  news  periods  in  or- 
dinary newspaper  radio  listings — 
often  because  the  newspapers  omit  or 
disguise  these  news  periods,  some- 
times calling  them  merely  "talks". 

So  to  provide  his  customers  and 
prospects  with  handy  news  programs. 
Jack  Hoffman  of  Home  Radio  Ser- 
vice, 521  W.  48th  Street,  New  York 
City,  had  all  the  local  news  periods 
listed  up  on  a  standard  government 
postcard  and  mailed  copies  of  these  to 
his  customers.  With  one  of  Hoffman's 
cards  in  hand,  the  lucky  listener 
can  usually  pick  up  a  news  period 
within  a  few  minutes,  at  any  time  of 
the  day.  And  the  card  is  carefully 
preserved  near   the   customer's   radio. 

DEALER  TAKES  A  FARMER  ALONG 

*  When  Joseph  Connor,  owner  of 
the  Connor  Battery  &  Electric  Co., 
Baraboo,  Wisconsin,  wants  to  canvass 
a  certain  rural  district  to  sell  radios, 
he  first  gets  a  resident  of  that  com- 
munity to  go  with  him  and  introduce 
him  to  other  rural  inhabitants.  This 
idea  has  worked  out  well  and  has  re- 
sulted in  many  satisfactory  sales. 

These  farmers,  of  course,  are  not 
required  to  do  any  sales  work;  they 
merely  vouch  for  the  fact  that  Con- 
nor is  a  worthy  dealer  by  the  very 
fact  that  they  are  with  him. 

Even  when  a  dealer  has  to  pay  a 
farmer  for  such  service,  the  money  is 
well  spent,  states  Mr.  Connor,  for 
many  prospects  are  usually  gained. 
Such  a  farmer  can  also  tell  a  dealer, 
while  they  are  riding  along,  who  has 
a  radio  and  who  hasn't  in  certain 
areas.  He  will  also  tell  very  fre- 
quently what  the  likes  and  dislikes 
of  many  farmers  are  concerning 
radios   and  electrical   appliances. 

Often  some  satisfied  rural  customer 
will  go  willingly  on  such  an  expedi- 
tion, without  asking  pay,  Mr.  Connor 
reports,  and  when  this  is  done  some 
consideration  can  be  shown  the  man 
when  he  is  ready  to  buy  his  next  radio 
set. 


"I  never  go  canvassing  in  rural 
areas  where  I  am  unknown  without 
taking  somebody  along  who  knows 
those  people,"  says  Mr.  Connor.  "I 
may  not  even  try  to  sell  anything  on 
that  first  trip,  as  farmers  do  not  like 
to  be  rushed  into  buying.  However, 
on  my  next  trip  around  I  go  alone. 
My  contacts  are  already  established ; 
these  farmers  feel  they  know  me,  and 
as  a  result,  they  are  friendy  and  in  a 
mood  to  talk  business." 

FOR  BIG  CITY  RADIO  RECEPTION 


The  words  for  this  scene  are  "unlim- 
ited big  city  radio  reception — electric 
lights — fans — shaver — electric  fence." 
From  Wincharger  Corp's  new  farm 
radio  movies  produced  by  United  Film 
Ad  Service. 

BUSINESS  HOUSES  AS  PROSPECTS 

Radio  dealers  are  overlooking  a 
good  bet  if  they  fail  to  push  receiver 
sales — particularly  small  radios — to 
business  houses,  restaurants,  stores, 
offices,  plants,  etc.  For  business  con- 
cerns a-  radio  set  is  a  business  asset 
in  attracting  customers  and  holding 
them  while  they  look  and  buy. 

What   places   in   your   town,    listed 
below,  are  without  radios : 
Barber  shops  Factories 

Restaurants  Shoe-shine  parlors 

Candy  stores  Beauty  shops 

Gas  stations  Drug  stores 

Offices  Cigar  stores 

SMALL  RADIOS  FOR  EVERY  ROOM 

Only  one  home  in  five  now  has  a 
"second"  or  extra  radio  set.  This 
field  of  second  and  third  radios  in  the 
home  is  the  one  which  now  offers  the 
greatest  opportunity  particularly  for 
small   radio  sets.     Every  comfortably 


equipped  home  should  have  at  least 
as  many  radios  as  there  are  people  in 
the  household. 

Check  over  with  your  customers  the 
places  where  they  still  need  radios : 
Kitchen  Nursery 

Dining  room  Game  room 

Bedrooms  Maid's  room 

Sewing  room  Chauffeurs  room 

Play  room  Garage 

Daughter's  room        Workshop 
Son's  room  Attic 

KEYS  USED  TO  ATTRACT 
TEXAS  PROSPECTS 

*  Dealers  in  Houston,  Tex.,  are 
working  with  the  local  jobber  in  a 
stunt  involving  Loew's  State  Theater 
and  the  giving  away  of  10,000  special 
keys.  Radio  displays  were  featured 
in  the  foyer  of  the  theater,  and  dur- 
ing one  week  the  keys  were  presented 
to  those  who  wished  to  try  for  a  free 
radio  receiver. 

Three  of  the  keys  were  made  to  fit 
locks  on  one  of  three  radios  displayed 
at  local  Crosley  dealers'  stores,  and 
the  person  having  the  right  key  would 
be  awarded  the  set.  These  dealers 
have  reported  to  the  Houston  jobber, 
Reader's  Wholesale  Distributors,  that 
the  plan  had  the  instant  result  of 
drawing  a  large  number  of  persons  to 
their  stores. 

Hymen  Reader,  president  of  the 
jobbing  firm,  was  convinced  that  he 
"had  something"  in  the  new  "Presto- 
tune"  feature,  and  decided  to  give  it 
the  advantage  of  the  showy  atmos- 
phere which  is  found  in  the  finely  fur- 
nished lobbies  of  theaters. 

SELLS  MORE  ANTENNAS 

*  Realizing  the  importance  of  an 
all-wave  antenna  system  for  the  new 
sets,  a  Boston  outlet  ties  on  every  set 
it  sells  a  big  5%  by  8  inch  tag  calling 
attention  to  the  need  of  a  good  aerial 
to  pick  up  the  signals. 

The  text  of  this  tag  is  successful 
in  selling  new  antennas;  also  it  tends 
to  put  the  blame  for  poor  reception 
on  the  antenna  instead  of  the  set 
itself. 

Records  of  large  service  organiza- 
tions show  that  the  majority  of  com- 
plaints of  noise  are  caused  by  poor 
antennas. 

Remember,  No  Radio  is  better  than 
its  Antenna. 


May,  1938 


15 


"Within  the  past  three  months, 
tube  business  has  exceeded  all  expec- 
tations and  has  been  moving  with  a 
consistently  upward  trend.  The  per- 
centage of  increase  in  some  regions 
of  the  country  has  been  almost  star- 
tling! The  replacement  tube  busi- 
ness, like  parts,  bids  well  to  have  a 
banner  year  in  1938,  from  the  first- 
quarter  results." 

Thus,  the  voice  of  one  of  the  top 
executives  in  the  tube  business.  With 
the  figures  before  him,  he  reports  this 
branch  of  the  radio  business  to  have 
profited  by  set-backs  elsewhere. 

Another  tube  firm  took  a  look  at 
the  books  and  came  out  with  the 
statement  that  "the  first  quarter  of 
1938  shows  the  quantity  of  radio 
tubes  produced  and  sold  to  be  in  ex- 
cess of  any  similar  period  since  1929." 

This  company  declares  that  prog- 
ress in  recent  months  has  been  noted 
in  export  sales,  initial  equipment 
sales  to  domestic  radio  manufactur- 
ers, etc.,  and  merchandising  division 
sales  for  home  radio  replacement 
purpose.  (Exports  of  U.S.  radio  tubes 
in  January  of  this  year  totalled  388,- 
363.  In  February  the  total  was  410,- 
503;  March,  629,715.) 

Dealers   on  the  fob 

A  prominent  jobber  says  that  his 
dealers  have  a  new  attitude  toward 
the  tube  business: 

"They're  yelling  for  mailing  pieces 
which  will  take  their  imprint  and 
can  be  used  on  their  customers  as 
checkup  reminders.  I've  noticed 
that   they   are   using   more   of   them 


TUBES 
SELL 
FAST 


// 


Sales  consistently  up 
and  best  since  1929 
say  sales  reports. 


lately  and  re-orders  on  the  pieces  are 
strong." 

Cases  like  this  one  may  explain 
how  it  happens  that  tube  headquar- 
ters have  noted  a  flourish  in  sales 
totals.  If  set  sales  are  slow,  tube 
replacements  deserve  an  extra  play 
and  the  retailers  are  aware  of  it. 
That's  why  the  pick-up  in  the  busi- 
ness is  as  general,  nationally  speak- 
ing, as  the  recession  itself.  Besides, 
there  are  some  3,800,000  more  receiv- 
ers in  use  in  the  country  than  were 
being  dialed  a  year  ago. 

Another    tube   sales    expert    points 


TODAY'S  BROADCAST  BILL-OF-FARE  MERCHANDISED  IN  WINDOW 


Passers-by  are  asked,  by  dealers  Weis  &  Fisher,  Rochester,  N.  Y.,  to  name  stars. 
Luxury  note  is  stressed  by  armchair  items  at  left,  Stromberg  Carlson  at  right. 


out  that  at  this  time  of  year  the  ad- 
vertising and  promotion  on  radio 
sets  reaches  one  of  the  low  points  of 
the  annual  curve.  Dealers  are  not 
represented  in  local  newspapers  or 
on  the  local  radio  station,  unless  they 
go  to  work  on  tube  replacements. 
Many  retailers  are  not  willing  to 
allow  radio  interest  to  lag  during 
the  summer  because  they  lose  the 
benefit  of  gilt-edged  campaigns  staged 
during  the  winter.  Tube  promotions 
are  the  answer. 

It  happens  that  there  were  some 
mighty  effective  tube  sales  cam- 
paigns last  winter,  too,  so  that  sum- 
mer work  already  has  an  advantage. 
And  recently  the  dealer  has  been  ap- 
proached with  deal  after  deal  after 
deal;  he  certainly  has  the  stock. 

Summer  prospects 

To  reach  summer  prospects,  dealers 
find  that  this  year  the  promotion 
items  available  from  manufacturers 
are  novel,  inexpensive,  varied  and 
dramatic.  The  fact  that  merchan- 
dising aids  are  cheap  this  season  is 
important  to  retailers  whose  volumes 
have  been  low.  Advertising  expendi- 
tures must  be  kept  down,  and  tube 
makers  have  done  the  appropriate 
thing. 

Among  tube  leaders,  the  sales  aids 
are  being  tested  before  they  are  is- 
sued. Suggestions  and  ideas  from 
the  dealer  who  actually  sells  tubes  to 
the  consumer  are  invited  and  com- 
piled. The  result  is  that  merchan- 
dising assistance  is  so  carefully 
gauged  that  it  is  known  to  have 
wallop  before  it  is  released. 


VICTOR  TUBES 

Presented  with  the  new  ECA  1938- 
39  radio  line  is  a  new  EGA  Victor 
radio  tube,  which  will  be  sold  exclu- 
sively through  the  company's  whole- 
salers handling  similarly  branded  ra- 
dios, ECA  Victrolas  and  Victor  rec- 
ords. The  famous  Victor  dog  trade- 
mark with  the  line  "His  Master's 
Voice"  will  appear  on  the  tube  pack- 
age. 

All  of  the  new  ECA  radio  products 
will  henceforth  be  equipped  with  the 
new  tubes,  but  they  will  not  in  any 
sense  supplant  either  the  Eadiotron 
or  the  Cunningham  tubes  now  being 
marketed  through  other  channels.  The 
new  series  will  be  available  in  all 
current  receiving  types  in  which  other 
ECA  tubes  are  now  made,  around 
June  1st.  The  company  has  planned 
a  big  advertising  and  merchandising 
program  for  the  new  product. 


16 


Radio  Today 


THE  RECORD  MONTH 

Developments  in  the  fast-growing  disc  business 


RECORDS  FOR  SOUND  MEN 

One  of  the  problems  of  the  public 
address  specialist  is  the  selection  of 
records  for  use  in  spots  where  ampli- 
fiers are  sold.  D'ance  halls,  night 
clubs,  amusement  parks  and  swim- 
ming pools  often  want  to  play  record- 
ed music,  and  they  expect  the  sound 
man  to  advise  them  on  what  records 
can  be  used  without  legal  difficulties. 

Where  recorded  music  is  used  in  a 
situation  where  live  musicians  might 
be  replaced,  the  musicians'  unions  are 
likely  to  object.  Eecord  companies 
have  adopted  the  practice  of  stamping 
each  record  package  with  a  "restricted 
use"  notice,  which  limits  the  use  of 
the  record  to  non-commercial  purposes 
on  phonographs  in  homes.  This  reg- 
ulation of  course  does  not  apply  to 
records  played  on  coin-operated  ma- 
chines. 

Positive  positions  cannot  be  taken 
by  some  of  the  record  companies  be- 
cause they  have  not  completed  their 
agreements  with  the  musicians' 
unions.  Some  of  the  manufacturers 
are  saying  that  it  is  OK  to  use  the 
records  where  they  do  not  replace  mu- 
sicians, and  others  say  flatly  that  their 
discs  can  be  used  only  for  coin  ma- 
chines and  in  homes.  In  any  case  it 
is  up  to  the  buyer  of  the  amplifier  to 
make  the  record  selections.  The  sound 
man  may  only  tell  him  what  the  gen- 
eral situation  is. 

Meanwhile,  sound  experts  report  in 
large  numbers  that  their  customers 
are  playing  whatever  rcords  they  like, 
without  being  "called.'  One  PA  engi- 
neer says  that  he  knows  of  dozens  of 
amusement  parks,  sound  trucks  and 
swimming  pools  where  the  owners  are 
playing  records  with  no  thought  of  re- 
stricted use. 

TEST  SET  WITH  RECORD-PLAYER, 
THEN  SELL  IT 

An  increasing  number  of  radio 
servicemen  have  found  a  profitable 
means  of  increasing  their  income  by 
taking  along  one  of  the  new,  compact 
little  RCA  record-players  on  service 
calls. 

Many  extra  sales  have  resulted 
from  impromptu  home  demonstra- 
tions. The  most  successful  proce- 
dure is  for  the  serviceman  to  connect 
the  record-player  to  the  radio  receiver 
he  has  just  repaired,  presumably  as  a 


test,  and  play  a  lively  record  or  two. 
This  technique  never  fails  to  inter- 
est the  set  owner.  With  public  in- 
terest growing  in  recorded  music  it 
is  usually  a  simple  matter  to  clinch 
the  sale. 


BRUNSWICK  RECORDS  ABROAD 

*  Beginning  July  1  of  this  year, 
the  Electrical  &  Musical  Industries, 
Ltd.,  London,  England,  will  handle 
the  foreign  distribution  of  all  re- 
cordings of  the  Brunswick  Record 
Corp.  and  the  American  Record  Corp. 
in  the  British  Isles  and  throughout 


RCA-Victor  record  player 

+  DeLuxe  type  record  player.  Uses 
crystal  pick-up  with  true-tracking 
pick-up  arm.  Self-starting  constant 
speed  motor.  Large  turntable  for  10 
and  12-inch  records.  Housed  in  wrap- 
around cabinet  of  selected  walnut 
veneers.  Model  R94-B— list  ?32.50. 
RCA  Mfg.  Co.,  Front  St.,  Camden, 
N.  J. — Radio  Today. 


^  1 

Electric  phonograph 

*  Home  and  portable  type  electric 
phonograph  with  3-tube  amplifier. 
Crystal  pick-up,  selfj-starting  motor. 
Plays  10  and  12-inch  records  at  78 
r.p.m.  Dynamic  speaker  unit.  List 
$35.  Chicago  Sound  Systems  Co.,  160 
E.  Illinois  St.,  Chicago,  111. — Radio 
Today. 


practically  the  rest  of  the  world  ex- 
cept North  and  South  America. 
Brunswick's  distribution  contract 
with  Decca  Record  Co.,  Ltd.,  London, 
will  expire  in  June. 

According  to  an  announcement  by 
Brunswick  president  R.  W.  Alt- 
schuler,  the  new  arrangement  with 
EMI,  of  which  Sir  Louis  Sterling  is 
managing  director,  will  give  the  com- 
pany world  distribution  equal  to  that 
of  any  other  domestic  record  firm. 
The  move  is  part  of  Brunswick's  cur- 
rent expansion,  both  here  and  abroad. 

WAX  WORTH  WATCHING 

ROY  SMECK  and  his  Serenuders  playing  Ti-Pi-Tin 
and  A  Gypsy  Told  Me  from  tlie  20th  Century  Poi 
film,  "Happy  Lauding/'  both  with  VC  by  Donald 
King — Decca  1739. 

EMERY  DEUTSCH  and  his  orchestra  playing  Joseph! 
Joseph!  and  Who'll  Buy  My  Bulilitchki,  both  with  VC 
by  Nan  Wynn — Brunswick  8109. 

MYRON  HANLY  and  the  California  Ramblers  play- 
ing Cry,  Baby,  Cry,  with  Vlt  by  Kay  Hay  and  Collene 
Humour  with  Vlt  by  the  Rhythm  Quads — Bluebird 
B  7505. 

RAY  NOBLE  and  bis  orchestra  playing  Vilia  from 
"The   Merry   Widow"    and    Crazy    Rhythm — Brunswick 


JIMMY  D0RSEY  and  his  orchestra  playing  At  a 
Perfume  Counter  from  "Casa  Muiiaiia"  niH]  Love 
Walked  In  from  "The  Goldwyn  Follies"  both  with  VC 
by  Bob  Eberle — Decca  1724. 

DICK  ROBERTSON  and  his  orchestra  playing  Ob! 
Ma!  Ma!  and  Cry,  Baby,  Cry  both  with  VC  by  Dick 
Robertson — Decca  1720. 

MAXINE  (Vocadence)  SULLIVAN  with  Claude 
Thornhill  and  his  orchestra  singing  Please  Be  Kind 
and  Moments  Like  This  from  the  Paramount  Dim, 
"College  Swing"— Victor  25802. 

RUDY  VALLEE  and  his  Connecticut  Yankees  play- 
ing Oh!  Ma!  Ma!  with  Vlt  by  Bed  Stanley  and  the 
Gentlemen  Songsters  and  Lonesome — That's  All  with 
VR  by  Rudy  Vallee— Bluebird  B7543. 

HORACE  HEIDT  and  his  Brigadiers  playing  Be- 
wildered with  VC  by  Larry  Cotton  and  A  Gypsy  Told 
Me  from  "Happy  Landing"  with  VC  by  Charles  Good- 
win— Brunswick  8092. 

JIMMY  DORSEY  and  bis  orchestra  playing  The 
Week  End  of  a  Private  Secretary  with  VC  by  June 
Richmond  and  Stop  and  Reconsider  with  vocal  trio — 
Decca  1745. 

NELSON  EDDY  singing  Who  Are  We  to  Say  and 
Sun-Up  to  Sun-Down  with  male  quartet,  both  from  the 
MGM  film  "Girl  of  the  Golden  West"— Victor  4388. 

BENNY  GOODMAN  trio  playing  Sweet  Lorraine  and 
Goodman  quartet  playing  Dizzy  Spells — Victor  25822. 

ROSE  MARIE  with  orchestra  singing  I  Got  a  Guy 
and  This  Time  It's  Real — Bluebird  B7515. 

BOB  CROSBY  and  his  orchestra  playing  Always 
and  Always  from  MGM's  "Mannequin"  with  VC  by 
Kay  Weber  and  More  Than  Ever,  with  VC  by  Bob 
Crosby — Decca  1657. 

BING  CROSBY  singing  This  Is  My  Nirjht  to  Dream, 
from  Major  Pictures*  "Dr.  Rhythm"  and  The  Moon 
of  Manakoora  from  Goldwyn's  "The  Hurricane,"  both 
with  John  Scott  Trotter  and  his  orchestra — Decca 
1649. 

HORACE  HEIDT  and  his  Brigadiers  playing  I'll 
Take  You  Home  Anahi  Kathleen,  with  VC  by  Larry 
Cotton  and  Heinh-Ho  from  "Snow  White  and  the 
Seven  Dwarfs,"  with  VC  by  the  Kings  and  glee  club — 
Brunswick    8074. 

BENNY  GOODMAN  and  his  orchestra  playing  One 
o'clock  Jump  and  Don't  Be  That  Way — Victor 
B25792. 

GLEN  GRAY  and  the  Casa  Loma  orchestra  playing 
You  Have  Everythinn  with  VC  by  Pee  Wee  Hunt  and 
I  See  Your  Face  Before  Me  with  VC  by  Kenny  Sar- 
gent,  both  from  "Between  The  Devil" — Decca   1608. 

HAL  KEMP  and  his  orchesttra  playing  Take  a 
Tip  from  the  Tulip  with  vocal  refrain  by  Bob  Allan, 
and  Speak  Your  Heart  with  vocal  refrain  by  Rosalind 
Marquis,  both  from  the  RKO  fllm  "Radio  City  Reveli" 
—Victor    25732. 


May,  1938 


17 


*  Jobbers  and  dealers,  who  in  the 
past  have  reluctantly  accepted  sound 
as  an  incidental,  have  suddenly  come 
face-to-face  with  a  fast-growing  in- 
dustry demanding  new  methods  of 
distribution,  comments  Al  Batis,  Al- 
gene  Sound  &  Eadio  Co.,  Philadel- 
phia, Pa. 

With  the  growth  of  the  sound  in- 
dustry, radio  service  men,  jobbers  and 
dealers  realize  the  inadvisability  of 
building  their  own  equipment,  since 
the  manufacturers  have  standardized 
complete  units  and  are  setting  firm 
prices  and  establishing  definite  dis- 
tribution policies.  Such  arrangements, 
creating  a  better  understanding  be- 
tween dealer,  distributor  and  manu- 
facturer, also  tend  to  gain  public  con- 
fidence in  package  merchandise  and 
its  reliability.  With  the  standardiza- 
tion of  units,  the  dealer  does  not  nec- 
essarily have  to  be  an  engineer  to  in- 
telligently promote  the  sale  of  this 
type  of  amplification  equipment. 
,i  Sound. equipment  is  a  specialty  item 
requiring  specialized  concentrated  ef- 
fort. Having  selected  equipment 
which  merits  confidence,  the  sound 
specialist  should  confine  his  sales  to 
that  line.  Such  loyalty  along  with 
continued  plugging  will  result  in 
sound  sales. 

Special  ideas 

Distribution  through  a  sound  special- 
ist is  warranted,  since  the  sound 
specialist  is  constantly  developing 
new  ideas  for  furthering  sales  of  the 
product  which  is  the  nucleus  of  his 
business.  Having  become  familiar 
with  the  various  sound  problems  from 
both  the  technical  and  sales  angles, 
he  is  able  to  best  supply  the  dealer 
with  his1  ideas  on  how  to  solve  sound 
problems  and  overcome  sales  resis- 
tance, also  to  supply  the  proper  equip- 
ment backed  by  the  technical  knowl- 


POLICIES  FOR  DISTRIBUTORS 

Concentrated  effort  required. 
Should    stock  complete   line. 


edge  required  in  making  successful 
installations.  The  sound  specialist 
should  be  cognizant  of  the  value  of 
having  a  number  of  dealers  pushing 
his  product  and  in  this  respect  should 
concentrate  on  the  dealer  trade  with 
the  view  toward  greater  distribution. 
The  cooperation  in  sales  promotion, 
which  the  sound  specialist  receives 
from  the  manufacturer,  should  be 
passed  along  by  him  to  the  dealer, 
even  to  the  point  of  consummating  a 
sale  for  the  dealer,  continues  Mr. 
Batis.  Making  surveys  for  the  dealers, 
assisting  with  specifications  and  plac- 
ing at  the  dealers'  disposal  the  neces- 
sary technical  knowledge  will  gain 
dealer  confidence  and  widen  the  scope 
of  sound  sales. 

Safes  promotion 

Promoting  sales  through  dealers 
will  not  be  as  remunerative  as  direct 
sales,  but  will  eventually  bear  fruit 
by  a  greatly  increased  volume.  A 
sound  sale  placed  through  a  dealer 
will  undoubtedly  awaken  him  to  the 
realization  of  the  potential  profits 
available  and  gain  a  booster  for  your 
sound  products. 

Direct  mail  advertising  followed  by 
a  direct  call  of  a  good  man,  who  has 
become  familiar  with  the  sound  prob- 
lem of  the  organization  or  institution 
on  whom  he  is  calling,  is  by  far  the 
best  sales  promoter.  A  sales  repre- 
sentative, who  is  able  to  meet  his 
prospect  on  an  even  footing  and  dis- 
cuss intelligently  his  particular  prob- 
lem and  show  him  how  sound  will  in- 
crease or  facilitate  the  operation  of  his 
business,  is  generally  a  welcome  caller. 
Submitting  an  intelligent  composite 
prospectus  and  constant  follow  up  of 
the  prospect  is  advisable. 


The  sound  distributor  should  al- 
ways bear  in  mind  that  he  is  the  fac- 
tory representative  and  as  such  should 
place  the  equipment  in  the  most  ad- 
vantageous light.  In  this  respect, 
since  a  large  quantity  of  sound  equip- 
ment is  sold  through  recommendation, 
each  sound  installation  properly  in- 
stalled is  the  best  form  of  advertise- 
ment. 

Ethical  distribution,  so  that  the 
sound  distribution  is  not  placed  in 
the  position  of  competing  with  his 
dealers,  is  essential  in  order  that  com- 
plete dealer  protection  is  assured. 
Many  sound  distributors  and  dealers 
are  guilty  of  approaching  their  pros- 
pects with  stories  based  on  the  in- 
feriority of  their  competitor's  products 
and  fail  to  acquaint  the  prospect  with 
the  merits  of  their  own  products.  Such 
negative  sales  methods  are  not  only 
unethical,  but  also  suggest  to  the 
prospect  the  advisability  of  inquiring 
as  to  the  relative  merits  of  the  various 
equipment  available. 

Sound  specialists  should  sell  con- 
fidence— confidence  in  the  reliability 
of  the  firm  and  product  they  repre- 
sent— confidence  in  their  reliability 
and  faithful  performance  of  all  prom- 
ises. 

Jobs  best  ads 

Since  each  installation  is  the  best 
form  of  advertising,  the  sound  special- 
ist should  treat  each  case  individually 
and  try  to  visualize  the  requirements 
of  his  factor.  Installations  having  a 
touch  of  individuality  are  difficult  to 
duplicate  and  suggest  the  advisability 
of  dealing  with  a  sound  specialist. 

The  dealer,  having  arranged  his  or- 
ganization around  capable  assistants, 
can  utilize  the  advantage  of  various 
forms  of  advertising  and  should  bear 
in  mind  that  most  sound  sales  are  con- 
tingent upon  successful  demonstra- 
tions. In  order  to  satisfactorily  dem- 
onstrate sound  equipment,  the  sound 
specialist  should  maintain  a  complete 
line  of  sound  equipment  manufac- 
tured by  the  company  he  represents. 
In  this  manner  he  can  readily  demon- 
strate to  his  dealers  and  prospects  the 
various  types  of  equipment. 


Many  types  of  outdoor  events  are 
now  being  scheduled  for  the  "town 
square" — fertile  sales  ground  for  PA 
men.  Here's  the  annual  public  wed- 
ding in  Maryville,  Mo.,  staged  with 
benefit   of  amplifiers. 


NARAR  ON  THE  MARCH 

National  headquarters  for  the  Na- 
tional Association  of  Eadio  &  Ap- 
pliance Dealers  have  been  established 
at  3930  Lancaster  Ave.,  Philadelphia, 
Pa.  Recently  from  executive  secre- 
tary B.  H.  Poucher  at  that  address 
came  Bulletin  No.  1,  emphasizing  the 
immediate  need  for  national  coopera- 
tive action  among  dealers  and  dealer 
associations,  and  outlining  the  11- 
point  working  platform  drafted  by 
H.  C.  M.  Capron  and  adopted  by 
NARAR  at  the  outset. 

Next  meeting  of  the  organization  is 
set  for  the  first  week  in  July  at  Chi- 
cago. Meanwhile,  according  to  the 
first  bulletin,  "every  local  association 
of  electrical  appliance  dealers  and 
every  individual  dealer  in  cities  where 
there  is  no  local  association  is  eligible 
for  membership  in  NARAR  and  will 
want  to  become  associated  at  once. 
We  also  solicit  membership  of  retail 
dealer  groups  now  allied  with  electri- 
cal associations  and  electrical  leagues 
everywhere." 

DEALER  OUTSIDE-SELLS  IRONS 

Four  salespeople,  women,  working 
on  "cold"  calling  house-to-house,  are 
stirring  up  plenty  of  iron  business 
for  the  Lincoln  Co.,  Brooklyn,  N.  T. 
Manager  J.  J.  Brecher  points  out  that 
the  stunt  is  opening  up  a  nice  series 
of  accounts  for  radio  and  appliances, 
too. 

Each  saleslady  carries  a  small  black 
case  containing  a  demonstrator  iron, 
and  a  selection  of  materials,  cut  in 
small  pieces.  The  iron  being  used  is 
the  new  Steem  Electric,  and  the  ma- 


ACTION  ON 
APPLIANCES 


terials  used  in  the  demonstration  are 
those  generally  considered  by  house- 
wives to  be  the  most  difficult  to  iron 
properly. 

Ringing  doorbells,  the  salespeople 
are  encouraged  by  their  employer  to 
open  the  case  and  get  the  iron  in  sight 
as  soon  as  possible  after  the  housewife 
appears  at  the  door. 


CLEANERS,  WASHERS, 
IRONERS,  RAZORS 

Latest  monthly  check-up  on  the 
sales  of  household  electrical  vacuum 
cleaners  reveals  that  March  totals 
were  135,543,  an  increase  of  35  per 
cent  over  the  February  figure  of  100,- 
412,  but  a  decrease  of  32.37  per  cent 
from  the  sales  for  March  last  year. 
C.  G.  Frantz,  of  the  Vacuum  Clean- 
er Manufacturers'  Association,  points 
out  that  "sales  are  running  neck  and 
neck  with  comparison  months  of  1936, 
second  highest  year  in  the  industry's 
history." 

From  executive  secretary  Bohnen  of 
the  American  Washing  Machine 
Manufacturers'  Association  comes 
the  news  that  washer  shipments  in 
March  totalled  117,025,  an  increase  of 
23.54  per  cent  over  February. 

March    ironer   shipments   were  10,- 


727,  compared  to  10,823  in  February. 
On  the  subject  of  electric  razors, 
the  magazine  Fortune  made  a  check 
on  the  industry  and  reported  2,000,- 
000  of  them  to  be  in  use.  Sales  last 
year  were  set  at  1,500,000,  with  a  re- 
tail value  of  $20,000,000. 


~~i  " 


An  anti-recession  move  among  alert  radio  and  appliance  merchandisers  is  a  new 

emphasis    on    time-buying    service.     Here,    the    Sunrise    Utilities    Co.,    Rockville 

Center,  N.  Y.,  uses  budget-plan  displays. 


Crosley  electric  ranges 

New  line  includes  six  models,  from 
the  deluxe  type  to  kitchenette  num- 
bers especially  for  apartment  use. 
One  series  is  equipped  with  a  com- 
bination of  electric  and  coal  or  elec- 
tric and  oil  burners.  Model  K853, 
illustrated  herewith,  has  3  Chromalox 
closed  units  and  RE-30  Speedwell 
cooker.  Convertible  oven,  low  setting 
thermostat.  Provision  for  time  con- 
trol. Three  heat  silver  contact  switches. 
Low  simmering  unit  available.  Other 
special  features.  Crosley  Radio  Corp., 
Cincinnati.  Ohio — Radio  Today. 


J.  Howard  Teagan  has  been  ap- 
pointed export  manager  for  Universal 
Cooler  Corp.,  Detroit,  according  to  re- 
cent news  from  Frank  8.  McNeal, 
president  and  general  manager  of  the 
company.  Mr.  Teagan  is  a  veteran 
in  overseas  business  circles,  and  has 
already  received  inquiries  from  dis- 
tributors in   35  foreign  countries. 


Two  promotions  within  the  head- 
quarters staff  of  Frigidaire  Division, 
General  Motors  Corp.,  were  announced 
recently  by  E.  G.  Biechler,  general 
manager.  Edgar  A.  Fisher,  manager 
of  the  appliance  engineering  depart- 
ment, has  been  appointed  general 
budget  director  of  Frigidaire  Division. 
F.  H.  McCormick.  chief  engineer,  elec- 
tric range  engineering  department, 
has  been  appointed  manager  of  the 
appliance  engineering  department  to 
succeed  Mr.  Fisher. 


Crosley's  new  million  dollar  re- 
frigerator cabinet  factory  at  Rich- 
mond, Ind.,  has  been  completed  in 
record  time  and  is  in  operation.  It 
occupies  a  90-acre  tract  of  land  in 
Richmond  outskirts:  the  factory  itself 
ia  1,200  ft.  long  and  200  ft.  wide,  with 
a  maximum  capacity  of  1.200  Shelva- 
dor  cabinets  a  day.  Crosley  declares 
that  "the  entire  plant  is  clean  enough 
to  serve  as  a  fine  dining  room;  the 
unsurpassed  production  facilities  are 
matched  by  the  finest  working  condi- 
tions   in    any    factory    in    the    world." 


May,  1938 


19 


AN  ALL-PURPOSE  MIKE  FOR  P.  A.? 


Velocity  microphone's  good   points   are  pre- 
sented, including  its  freedom  from  wind  trouble 


The  article  on  "Better  Sound  Jobs" 
in  Radio  Today  for  April  has  created 
a  good  deal  of  discussion.  Sam-  Rutten- 
berg  of  Amperite  took  exception  to  two 
statements  there  made,  and  so  the  edi- 
tors of  Radio  Today  have  invited  his 
frank  comments  in  the  paragraphs  be- 
low, and  also  invite  other  readers  to 
express  their  views  on  the  points 
brought  out  in  the  original  article  and 
in  the  discussion.  Mr.  Ruttenberg's 
communication  follows.    Editob. 

Dear  Dr.  Caldwell,  Editor  Radio  Today: 
Exception  is  taken  to  two  remarks 
on  page  31  of  last  month's  Radio  To- 
day. The  two  statements  in  question 
are:  1.  A  universal  microphone  with 
one  set  of  fixed  characteristics  does  not 
adequately  satisfy  the  many  problems 
of  sound  collection.  2.  Ribbon  micro- 
phones may  give  trouble  when  used 
out-of-doors  in  a  strong  wind  unless 
shielded  by  a  windbreak. 

The  latter  is  a  popular  misconception, 
because  even  a  sixty-mile  gale  will  not 
affect  the  ribbon  of  a  well  designed 
velocity  mike.  And  as  shown  later  the 
velocity  microphone  with  an  acoustic 
compensator  is  a  universal  microphone 
for  P.A.  work — or  at  least  99  per  cent 
universal. 

The  wind  misconception  is  probably 
due  to  the  fact  that  the  ribbon  of  the 
velocity  is  made  of  a  light  aluminum 
alloy  and  only  2  ten-thousandths  of  an 
inch  thick — so  light  that  its  natural 
period  is  10  cycles  per  second — and  the 
reason  for  its  freedom  from  annoying 
and  tiring  peaks.  (The  natural  period 
or  peaks  of  even  the  smallest  and  light- 
est diaphragm  of  any  commercial  dia- 
phragm type  microphone  is  within  the 
audio  range  of  1,000  to  7,000  cps.)  And 


strange  as  it  might  seem  the  lightness 
and  thinness  of  the  ribbon  has  proven 
to  be  the  reason  for  the  ruggedness  of 
the  velocity  microphone.  Should  such 
a  microphone  be  accidently  dropped  or 
subjected  to  severe  mechanical  shocks 
the  light  flexible  ribbon  is  not  perma- 
nently distorted.  It  merely  flutters  a 
little  and  then  returns  to  the  normal 
position.  A  heavier  mass  subjected  to 
shocks  would  tend  to  distort  perma- 
nently. About  the  only  way  to  break 
a  ribbon  is  to  open  the  microphone  and 
put  your  finger  or  a  screw-driver 
through  it.  (The  ribbon  of  the  veloc- 
ity is  cheaper  to  replace  than  the  mov- 
ing element  of  any  other  microphone). 

Mikes  out  of  doors 

When  we  talk  of  "microphone 
trouble  out  of  doors"  we  mean  two 
things  1.  The  microphone  might  be 
permanently  damaged  by  the  wind,  and 
2.  Wind  causes  an  audible  noise  in  the 
speakers. 

In  the  early  days  of  the  velocity,  and 
to  some  small  extent  today,  some  peo- 
ple thought  singing  too  loudly  into  a 
velocity  or  blowing  a  trumpet  too  near 
it  would  break  the  ribbon.  As  a  mat- 
ter of  fact  you  can  blow  a  trumpet  into 
a  velocity  mike  all  day  long  without 
damaging  the  ribbon  in  any  way.  A 
sixty-mile  gale  would  not  damage  it. 
As  stated  above  the  only  way  to  dam- 
age the  ribbon  is  to  put  your  finger 
through  it,  or  a  high  voltage  directly 
on  the  microphone. 

Now  that  we  understand  that  even  a 
sixty-mile  gale  would  not  damage  the 
ribbon— Would  it  affect  it?  Yes.  A 
sixty-mile  gale  would  move  the  ribbon 
— not  as  much  as  you  probably  think — 


Field  pick-up  of  a  velocity  microphone  (right)  compared  with  that  of  a  diaphragm 

mike.     Note  velocity's  useful  angle  of  120  deg.  front  and  back.     Zero  response 

limited  to  only  20  deg. 


but  only  approximately  .003  inch.  The 
varying  pressures  of  a  gale  will  cause 
the  ribbon  to  vibrate  at  the  low  fre- 
quencies of  the  air  currents — this  will 
be  heard  in  the  speakers.  But  such  a 
gale  pressing  against  a  diaphragm  in- 
stead of  a  ribbon  would  also  cause  it 
to  vibrate  resulting  in  a  high  pitched 
sound  in  the  speakers.  The  high 
pitched  sound  is  due  to  the  fact  that 
the  diaphragm  is  pressed  to  a  strained 
position  by  the  wind,  causing  harmon- 
ic distortion  and  vibration  at  the 
peaked  frequency  of  the  diaphragm. 
The  ribbon  of  the  velocity  is  pressed 
in — but  being  so  light  and  flexible — it 
is  not  strained  and  reproduces  natural- 
ly in  its  new  position.  Incidently,  but 
most  important  for  "public  address," 
because  the  ribbon  is  never  strained, 
the  velocity  is  the  only  microphone 
free  from  harmonic  distortion. 

The  only  wind  therefore  that  will  be 
heard  in  the  velocity  Is  one  strong 
enough  to  be  audible.  A  mere  breeze 
will  not  be  heard.  The  protecting  cloth 
of  a  well-designed  velocity  filters  a 
strong  wind,  reducing  the  noise  in  the 
speakers  to  such  a  point  as  to  make 
it  negligible  for  all  outdoor  installa- 
tions. 

Wind  screens — where  do  they  come 
in?  There  are  such  things  as  wind 
screens  and  they  consist  of  merely  a 
perforated  cylindrical  screen  backed 
with  a  very  thin  open-weave  cloth — a 
very  sheer  silk  stocking  is  about  the 
weave.  The  space  between  the  micro- 
phone and  the  perforated  screen  should 
be  about  2  in.  This  is  used  in  outdoor 
stadiums  when  an  entire  stage  is  to  be 
picked  up.  The  performer  might  be 
any  distance  up  to  30  ft.  or  more  from 
the  microphone.  The  gain  required  for 
such  a  pickup  is  very  high  and  natur- 
ally any  extraneous  sound  near  the 
microphones  will  be  heard,  including 
a  stiff  audible  breeze.  The  wind  screen 
breaks  the  stiff  breeze  but  does  not 
have  any  effect  upon  the  sound  pro- 
duction. Diaphragm  microphones  can- 
not be  used  in  such  installations  be- 
cause of  feedback  and  also  because  the 
wind  causes  a  high-pitched  sound  in 
the  speakers  even  with  wind  screens. 
The  high-pitched  sound  is  due  to  the 
fact  that  the  wind  pressure,  even  after 
being  filtered  through  a  wind  screen, 
tends  to  make  the  diaphragm  vibrate 
at  its  natural  or  peaked  frequency.  In 
other  words,  for  unusual  outdoor  in- 
stallation where  wind  becomes  a  fac- 
tor, the  velocity  is  actually  the  best 
microphone  available  today. 

Getting  back  to  the  first  point — Is 
there  a  universal  microphone?  We  will 
answer  this  by  enumerating  the  varl- 
(Oontinued  on  page  34) 


20 


Radio  Today 


v  The  Complete  "IN  DEMAND" 
->         Radio  Line  for  1939 

OFFERS  PROFITABLE  DISTRIBUTOR  OPERATION 


p0v\ji&* 


Features-  ^uiU.in  Aen  p^l 

»*?*?  SUde-RfS  "Ava^b^S  Radio 

Leader- 


^  ,      A    4-ti*e 

V/atts  .opeaker,    1U  size  only  i_ 


SONORA  for  1939  presents  the  trade 
with  a  powerful,  complete  Radio  Line 
— with  the  style,  the  snap,  the  timely 
appeal,  the  extra  "something"  that 
makes  sales  efforts  click!  SONORA'S 
prices  are  tuned  to  the  times — lists  are 
appealing  and  right — and  net  prices  as- 
sure the  most  profitable  distributor 
operation  in  years!  SONORA  for  1939 
has  features  that  pack  appeal!  There's 
plenty  of  sales  ammunition  in  the  34 
magnificent  models,  ranging  all  the  way 
from  a  gem-like  4  tube  "Teeny-Weeny" 
to  a  built-to-sell  12  tube  console — peer- 
less A.C.  models  with  a  winning  em- 
phasis on  the  table  types — incomparable 
A.C.-D.C.  radios  —  outstanding  farm 
sets!  And  only  SONORA  can  match 
this  line  and  its  smashing  low  prices 
with  the  background  of  a  potent  na- 
tionally-known trade-mark  that  has 
millions  of  dollars  of  advertising  back 
of  it  and  top-ranking  acceptance. 
SONORA    is    "all    there"    for    1939! 


6    TUBf   {VlUant|rytur     :  2  ^  c  .    6    £       16    * 
Power   Tu  e       "'type  taV   DeU«e« 


6  TUBE  MODEL  C-22.  An  amazing  A.C.  Radio  Value 
typical  of  SONORA  Leadership  for  1939!  One  of  the 
most  brilliant  plastic-molded  designs  ever  created.  Tunes 
1720  to  535  K.C.  Features:  exclusive  SONORA  Dyna- 
Boost  Circuit;  2  Watts  Output;  Full  Dynamic  Speaker; 
Slide-Rule  Vernier  Dial;  Actual  7  tube  Performance. 
Available  in  ivory,  mottled  walnut,  back,  ivory  face  with 
black  body.     Mottled  walnut  model  lists  at  only 


95 


Ceeo*.  ad  a  S&gi? 

RADIO  &  TELEVISION  CORP. 

MERCHANDISE  MART  •  CHICAGO 

SONORA  is  open  for  qualified  distributors  for  terri- 
tories not  yet  adequately  represented.  Write,  'phone 
or  wire  for  complete  details. 


SINCE  1914  -  THE  LEADING  NAME  IN  THE  MUSIC  REPRODUCING  WORLD 


May,  1938 


21 


NEW  THINGS 

Latest  news  of  radio  products   from   the  manufacturers 


Sonora  radio  sets 

*  First  of  the  1939  sets  are  a 
7-tube  AC  table  superhet,  a  5  tube 
AC-DC  plastic  molded  table  set,  and 
a  4-tube  AC-DC  "Teeny-Weeny" 
model  (illustrated).  The  4-tube 
set  can  be  held  in  the  palm  of  the 
hand.  Tunes  550-1720  KC.  Dy- 
namic speaker  unit.  Weighs  only 
4  pounds.  Choice  of  walnut,  ivory, 
gray,  igreen,  and  red  and  black 
cabinets.  Sonora  Radio  &  Tele- 
vision Corp.,  Merchandise  Mart., 
Chicago,  111. — Radio  Today. 


Tobe   "pluggin"   condensers 

*  New  type  condenser  plugs  into 
standard  four  prong  UX  socket  and 
allows  experimenters  and  builders 
of  original  equipment  to  design  and 
incorporate  in  their  chassis  a  con- 
struction that  requires  no  servicing 
of  the  condenser  installation  for  the 
life  of  the  equipment.  Condenser 
has  safety  factor  when  operated  at 
475  volts  continuously.  It  will 
stand  peak  surges  of  600  volts  and 
higher.  Tobe-Deutschmann  Corp., 
Canton,  Mass. — Radio  Today. 


***•*. 


H 


Push-button  remote  control 

*  Remote  control  for  use  with 
any  radio  set.  Connects  to  antenna 
and  ground  posts  of  receiver.  Op- 
erates on  AC-DC  power — has  its 
own  power  unit.  Uses  iron-core 
type  tuning.  Also  provides  remote 
volume  control.  Choice  of  7  sta- 
tions. Model  9-1000— list  $26.50. 
Meissner  Mfg.  Co.,  Mt.  Carmel, 
111. — Radio  Today. 


Philco  noise  eliminator 

*  Noise  filter  for  cutting  down 
radio  noise  produced  by  electric 
razors  and  other  small  appliances. 
Unit  has  3  fixed  condensers.  In- 
serted between  appliance  plug  and 
wall  outlet.  Requires  ground  con- 
nection. Part  No.  45-2600.  Philco 
Radio  &  Television  Corp.,  Tioga 
St.,  Philadelphia,  Pa.— Radio  To- 
day. 


U-H-F  converter 

*  Ultra-high-frequency  converter 
for  use  on  any  good  broadcast  re- 
ceiver. Tubes  25  to  63  megacycles. 
Switch  connects  antenna  to  BC  set 
or  converter.  Operates  on  AC-DC 
with  internal  power  supply.  Bakel- 
ite  cabinet  6  inches  wide  and  4% 
high.  Model  207— list  $12.  Detrola 
Corp.,  1501  Beard  Ave.,  Detroit, 
Mich. — Radio  Today. 


Stancor  universal 
transformers 

+  Line  of  14  universal  type 
power  transformers  for  replace- 
ment use.  Services  majority  of 
existing  sets.  Brackets  permit 
horizontal  or  vertical  mounting. 
May  also  be  used  in  half-shell  type 
of  mounting.  Black  finish — con- 
servatively rated.  Standard  Trans- 
former Corp.,  1500  N.  Halsted  St., 
Chicago,  111. — Radio  Today. 


Radio   City  tube  checker 

*  Low-cost  tube  tester  for  use 
with  all  tubes,  including  ballast. 
Short  and  leakage  tests  between 
all  elements.  Individual  tests  of 
each  section  of  rectifiers  and  multi- 
purpose tubes.  Uses  emission  prin- 
ciple. Three-inch  square  meter. 
Counter  type  model — net  $16.95. 
Radio  City  Products  Co.,  88  Park 
Place,  New  York,  N.  Y. — Radio  To- 
day. 


Paging  and  interphone  system 

+  7-watt  paging  and  inter-office 
intercommunicating  system.  For 
use  in  factories  and  other  places 
where  the  sound  must  overcome 
a  high  noise  level.  High-sensitiv- 
ity permits  talk-back  over  great 
distances.  Amplifier  separate  from 
desk  unit.  Model  305-7.  Webster 
Co.,  5622  Bloomingdale  Ave.,  Chi- 
cago, 111. — Radio  Today. 


Mallory  mica  condensers 

*  Compact  type  mica  condens- 
ers using  best  grade  of  India  mica. 
Treated  to  resist  moisture.  Low- 
resistance  connection  between  lead 
and  foil.  Molded  bakelite  case — 
soft  tinned  leads.  P.  R.  Mallory  & 
Co.,  Inc.,  Indianapolis,  Ind. — Radio 
Today. 


Bantam  type  tubes 

*  Line  of  extremely  small  radio 
tubes  for  use  in  compact  receivers. 
Short  lead  construction.  Available 
in  types  corresponding  to  the  AC- 
DC  octal  line  of  tubes.  Use  octal 
bases.  Hytron  Bantams  are  2Vi  to 
3%  inches  overall  height.  Hytron 
Corp.,   Salem,   Mass. — Radio   Today. 


Utah  push  button  tuning   unit 

*  Motor-driven  automatic  push- 
button tuning  unit.  Extremely 
compact — size  only  ZYa  x  2%  x  2; 
inches.  Turns  180°  in  one  second. 
Available  in  4,  6,  8  button  units. 
Stations  set  up  from  front  of  set. 
Free  from  drift.  Utah  Radio  Prod- 
ucts Corp.,  820  Orleans  St.,  Chi- 
cago, 111. — Radio  Today. 


22 


Radio  Today 


Wait  until  you  see  how 
RCAVictor  cuts  you  in 
on  its  40th  Anniversary 
Celebration. ..It'll  be  a 
Profit  Surprise! 


RCA  MANUFACTURING  CO.,  INC.     •      CAMDEN,  NEW  JERSEY 
A  SERVICE  OF  THE  RADIO  CORPORATION  OF  AMERICA 

RCA  presents  the  "Magic  Key"  every  Sunday,  2  to  3  P.  M.,  E.  D.  S.  T.,  on  the  NBC  Blue  Network. 

Over  325  million  RCA  radio  tubes  have  been  purchased  by  radio  users  ...  in  tubes,  as  in 
radio  sets,  it  pays  to  go  RCA  All  the  Way. 


May,  1938 


23 


MORE  NEW  THINGS 


Pee  Wee  transmitter 

*  Crystal-controlled  transmitter 
kit  for  all-band  operation.  Input 
of  25  watts.  May  be  used  as  an 
exciter  for  a  hi-power  transmitter. 
Compact  unit  complete  on  single 
chassis  with  power  supply.  Com- 
plete with  crystal,  meter,  tubes, 
coil,  form  and  wire — net  $19.95. 
General  Transformer  Corp.,  1250 
W.  Van  Buren  St.,  Chicago,  111. — 
Radio  Today. 


Aircraft  microphone 

*  Single-button  carbon  type 
microphone  designed  especially  for 
aircraft  use.  Hand  type  unit  which 
operates  in  any  position.  Press- 
button  switch.  Shielded  cable. 
Weight  of  entire  unit  is  8  ounces. 
Universal  Microphone  Co.,  Ingle- 
wood,  Calif. — Radio  Today. 


Hi-voltage  keying  relay 

*  Relay  designed  for  keying  in 
high-voltage  circuits.  5000-volt 
rating  from  contacts  to  grtound. 
Operates  on  6-8  volt  battery.  Sil- 
ver-to-silver double-break  contacts. 
Handles  keying  speeds  up  to  50 
words  per  minute.  Model  507-516 — 
list  $7.50.  Ward  Leonard  Electric 
Co.,  Mt.  Vernon,  N.  Y. — Radio  To- 
day. 


Plug-in   air  condensers 

*  Fixed  type  air  condensers 
with  plug-in  mountings.  Used  to 
increase  minimum  capacity  in  cir- 
cuits using  a  small  variable  con- 
denser. Available  in  80  and  45 
mmfd.  sizes  with  .125  and  .25  inch 
air-gaps  respectively.  Alsimag  in- 
sulation. List  $5.50.  Allen  D. 
Cardwell  Mfg.  Corp.,  81  Prospect 
St.,  Brooklyn,  N.  Y. — Radio  Today. 


Fada  Coloradios 

*  AC-DC  type  table  radios  in 
plastic  cabinets.  Uses  6  tubes  in- 
cluding ballast  unit.  Tunes  535- 
1720  KC  in  one  band.  Beam  power 
tube  gives  2-watts  output.  Over- 
load control.  Built-in  antenna. 
Series  20  in  walnut,  ivory  and 
ivory  with  gold  trim.  Fada  Radio 
&  Electric  Co.,  30-20  Thomson  Ave., 
Long  Island  City,  L.  I.,  N.  Y.— 
Radio  Today. 


Automatic   voltage   stabilizer 

*  Automatic  voltage  regulator 
for  holding  an  AC  voltage  constant 
at  115  plus  or  minus  1  per  cent 
with  line  variations  from  95  to  130 
volts.  Magnetic  device  without 
moving  parts  or  adjustments.  Avail- 
able in  capacities  up  to  several 
thousand  watts.  Raytheon  Mfg. 
Co.,  144  Willow  St.,  Waltham, 
Mass. — Radio  Today. 


30-watt  sound  system 

*  Portable  type  sound  system 
with  30-watt  output.  Dual  12-inch 
speakers  with  infinite  type  baffles. 
4  input  channels  for  use  with  all 
mikes.  Cathode  ray  output  indi- 
cator. Master  volume  control- 
individual  tone  controls.  Lafayette 
model  825-T.  Wholesale  Radio  Ser- 
vice Co.,  100  Sixth  Ave.,  New  York, 
N.  Y—  Radio  Today. 


Coil  cores 

*  High-frequency  iron  cores  for 
use  with  coils.  Available  in  shell 
and  cross-type  cores.  Trimming 
pins  for  variable  inductance  coils. 
Provides  circuit  Q  of  360  at  1000 
KC.  Morrill  and  Morrill,  30  Church 
St.,  New  York,  N.  Y. — Radio  To- 
day. 


45-watt  amplifier 

*  Triode  type  amplifier  using  4 
2A3  class  AB  output  amplifiers  for 
a  45-watt  output  with  less  than  5 
per  cent  distortion.  Frequency  re- 
sponse from  40  to  10,000  cycles 
with  y2  db.  variation.  Output  meter 
gives  power  in  watts.  Phono  and 
mike  inputs.  Thomas  B.  Gibbs  & 
Co.,  900  W.  Lake  St.,  Chicago,  111  — 
Radio  Today. 


Johnson  generator 

*  32-volt  800-watt  generator  for 
lighting  and  power  plants.  Single- 
cylinder  air-cooled  gas  engine  de- 
velops 2  h.p.  Fly-ball  type  gov- 
ernor. Complete  with  control  panel 
and  automatic  cutout.  Use  of  200 
ampere-hour  32-volt  battery  suggest- 
ed. Generator  model  EG-800 — list 
$198  less  batteries.  Johnson  Mo- 
tors, Waukegan,  111. — Radio  Today. 


Radio  furniture 

*  Living  suite  with  built-in 
radio.  Table  type  radio  fits  in 
compartment  in  the  arm  of  the 
divan.  3-piece  suite  costs  $89.50. 
Diamond  Parlor  Furniture  Co.,  76 
Traverse  St.,  Boston,  Mass. — Radio 
Today. 


Metal-clad  insulated  resistors 

*  Wire-wound  resistors  on  spe- 
cial heat-resistant  core  imbedded  in 
moisture-proof  bakelite  which  in 
turn  is  encased  in  a  metal  jacket. 
Excellent  heat  dissipation  due  to 
positive  contact  between  jacket, 
bakelite,  and  resistance  wire.  Pig- 
tail connections.  Available  from 
10  to  100,000  ohms  at  3  watts  rat- 
ing. Type  MPT.  Clarostat  Mfg. 
Co.,  285  N.  Sixth  St.,  Brooklyn, 
N.  Y. — Radio  Today. 


24 


Radio  Today 


The  Best  Known  Name  and  the 
Oldest  Trademark  in  the  Business 

Capitalize  on  the  definite  sales  advantages  of  the  RCA  Victor 
name  and  famous  trademark. 

Authorized  RCA  Victor  Radio  Tube  franchises  are  available 
only  through  RCA  Victor  Instrument  Distributors. 

RCA  presents  the  '  'Magic  Key"  every  Sunday,  2  to  3  P.  M. ,  E.  D.  S.  T. ,  on  the  NBC  Blue  Network. 

'RCA  T/jcZob  RADIO  TUBES 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
May,  1938 


A  Service  of  the  Radio  Corporation  of  America 

25 


MORE  NEW  THINGS 


Kit  of  radio  dial  belts 

*  Assortment  of  100  belts  in  en- 
ameled steel  kit-box,  with  measur- 
ing chart.  Belts  are  woven  fabric, 
same  as  originally  used  on  all  sets 
having  this  type  of  drive.  Proof 
against  moisture,  heat  and  stretch- 
ing. List,  $25.  J.P.D.  Manufactur- 
ing Co.,  4111  Port  Hamilton  Park- 
way, Brooklyn,  N.  Y. — Radio  Today. 


Safety  seals 


*  Pig-tail  type  fuses  for  use  in 
the  B —  circuit  of  radio  sets.  In- 
stalled in  a  few  minutes — protect 
power  transformer  and  rectifier 
tube  from  shorts.  Designed  to  pre- 
vent replacement  of  parts  at  the 
expense  of  the  serviceman.  Avail- 
able in  all  current  ratings.  Price 
$1.25  per  box  of  10  assorted  sizes. 
Aero  Tool  &  Die  Works,  1401  Wil- 
son Ave.,  Chicago,  111. — Radio  To- 
day. 


Metal  finish  for  rubber 

*  Bronze  lacquer  for  rubber  has 
been  developed  by  Maas  &  Wald- 
steln  Co.,  Newark,  N.  J.  Rubber 
lacquer  makes  it  possible  to  cover 
semi-stiff  rubber  with  a  strongly 
adherent,  durable  finish  resembling 
brass,  copper,  bronze,  aluminum, 
steel  or  other  metals. — Radio  To- 
day. 


Record  player  cabinet 

*  Mahogany  and  walnut  cabi- 
nets to  fit  the  RCA-Victor  93B  rec- 
ord player  unit.  Cabinet  has  cover 
which  can  be  closed  while  playing 


10  and  12-inch  records.  Cups  for 
new  and  used  needles.  Model  93 
cabinet  list  $7.  Table  to  match 
with  shelf  large  enough  to  hold  rec- 
ord albums.  List  $4.75.  Schloss 
Bros.,  801  E.  135th  St..  New  York, 
N.  Y. — Radio  Today. 


Film  type  sound  recorder 

■*■  Recording  device  to  be  used 
with  ordinary  16  mm.  motion  pic- 
ture projector  as  a  power  source. 
Output  of  radio  or  amplifier  drives 
attachment  which  scratches  sound 
track  on  film.  Up  to  28  tracks  on 
1  film.  Instantaneous  recording  and 
play  back.  Uses  old  and  exposed 
films  as  records.  Type  A — list 
$98.50.  Type  AA  listing  at  $150 
automatically  changes  from  one 
track  to  another.  Miles  Reproducer 
Co.,  812  Broadway,  New  York,  N.  Y. 
— Radio  Today. 


Yaxley  midget  controls 

*  Universal  type  midget  volume 
controls  for  all  circuits.  Available 
in  plain,  single  and  double  tap,  and 
dual  type  units.  5,000  ohms  to  3 
megs  in  all  necessary  tapers.  17 
plug-in  shafts  give  56  controls  a 
range  of  over  1,000  exact  duplicate 
replacements.  P.  R.  Mallory  &  Co., 
3029  E.  Washington  St.,  Indianap- 
olis, Ind. — Radio  Today. 


Television  tube 

*  Tube  designed  for  generating 
television  image  for  experiments 
and  servicing.  Does  not  require  a 
television  transmitter.  Tube  gen- 
erates image  portrayed  in  illustra- 
tion above.  Image  designed  so  as 
to  be  a  check  on  the  quality  of  the 
received  image.  Image  fixed  for 
any  one  tube,  but  tubes  may  be 
made  with  any  desired  image.  Tube 
is  designated  as  the  Monotron.  Na- 
tional Union  Radio  Corp.,  570  Lex- 
ington Ave.,  New  York,  N.  Y. — Ra- 
dio Today. 


Replacement    type    vibrators 

+  Vibrator  units  for  farm  and 
auto  radios.  Have  3/16  inch  tung- 
sten contacts  which  assure  in- 
creased life  and  reliable  service. 
Complete  listing  of  types  in  new  re- 
placement guide  which  is  available 
on  request.  American  Television 
&  Radio  Corp.,  128  E.  10th  St.,  St. 
Paul,  Minn. — Radio  Today. 


Monarch  signal  generator 

*  All-wave  signal  generator 
with  output  calibrated  in  micro- 
volts (]/2  to  100,000).  Tunes  100 
to  27,000  KC.  Vernier  dial  and 
calibration  gives  maximum  accu- 
racy of  calibration.  Each  of  5 
bands  calibrated  at  12  points — accu- 
racy better  than  1  per  cent  over 
long  periods  of  time.  400  cycle 
audio  modulator  available  for  audio 
tests.  Ratio  of  maximum  to  mini- 
mum output  over  entire  range 
about  2:1.  Electron-coupled  oscil- 
lator circuit.  Model  12-N — $47. 
Monarch  Mfg.  Co.,  3341  Belmont 
Ave.,  Chicago,  111. — Radio  Today. 


Stream-liner  windcharger 

•  32-volt  1,000-watt  wind  driven 
generator  for  charging  farm  bat- 
tery plants.  Direct  drive  to  gen- 
erator which  is  housed  in  hood. 
Pull  governor  protects  battery  from 
overcharging.  Positive,  self-align- 
ing stop  brake.  Hood  and  vane  in 
one  piece  and  streamlined.  Model 
1000— list  $170.  Wind-Impellor 
Electric  Works,  Ellsworth,  Iowa — 
Radio  Today. 


Upco  phono  pick-up 

*  Magnetic  type  phonograph 
pick-up  for  combinations  and  P.A. 
systems.  Ball-bearing  mounting— 
2  oz.  needle  pressure.  Free  from 
rattles  and  distortion.  Output  of 
1  volt.  Plays  up  to  12-inch  records 
at  33  and  78  r.p.m.  Black  crysta- 
Iine  finish.  Model  M-l  without 
volume  control — list  $7.25.  M-2 
with  control  $8.  Upco  Engineering 
Labs.,  Inc.,  254  Canal  St.,  New 
York,  N.  Y. — Radio  Today. 


26 


Radio  Today 


tat** 


WISTON  Model  773 

Counter  Tube  Checker 

(also  available  In  portable  type) 


STON 

Radio 
Instruments 


AT  CHICAGO 


Don't  fail  to  visit  the  Weston  Booth  at  the  Radio  Trade  Show, 
Stevens  Hotel,  Chicago,  June  8th  to  11th.  (Booth  No.  109-111 
Marconi  Boulevard.) 

SEE  the  very  latest  in  Weston  test  equipment .  . .  take  this  oppor- 
tunity to  examine  the  equipment  inside  and  out  and  see  for  your- 
self why  Weston  equipment  leads  in  accuracy,  dependability  and 
length  of  service. 

GET  full  particulars  about  the  50th  Anniversary  announcement 
Weston  is  making  at  the  Show  in  celebrating  a  half-century  of 
instrument  leadership  ...  an  announcement  which  presents  an 
unusual  opportunity  to  every  serviceman. 

If  you  are  unable  to  attend  the  Show,  however,  full  particulars  on 
the  "50th  Anniversary  Announcement,"  and 
on  all  Weston  test  equipment,  will  be 
mailed  to  you.  Just  return  the  coupon  today. 


Weston  Electrical  Instrument  Corporation 
597  Frelinghuysen  Ave.,  Newark,  N.  J. 

Send  the  "50lh  Anniversary  Announcement,'*  and  literature 
on   WESTON    Instruments. 


May,  1938 


27 


MORE   NEW   THINGS 


Light-weight  transformers 

*  Series  of  audio  transformers 
weighing  approximately  1  ounce. 
%-inch  diameter  by  1  3/16  overall. 
Available  for  inputs,  interstage, 
output,  mixing  uses.  Suitable  for 
hearing  aids,  aircraft  sets,  and 
portable  equipment.  United  Trans- 
former Corp.,  72  Spring  St..  New 
York,    N.    Y. — Radio   Today. 


Tops-all  auto  aerials 

*  Line  of  door-hinge,  bumper, 
and  cowl  type  auto  antennas. 
Lengths  up  to  100  inches  available. 
Guaranteed  rustproof.  Prices  range 
from  $1.50  up.  Complete  line  of 
connectors,  shielded  wire,  etc., 
available.  Burton  Rogers  Co.,  857 
Boylston  St.,  Boston,  Mass. — Radio 
Today. 


5-inch  cathode  ray 
oscilloscope 

*  Cathode  ray  'scope  with 
single  sweep  for  facilitating  the 
study  of  transients.  Grid  modula- 
tion permits  the  use  of  the  unit  for 
television  demonstration.  In  addi- 
tion a  beam  switch  has  been  added. 
Unit  has  all  the  other  features  of 
the  previous  5-inch  model  168.  Type 
171  is  the  new  designation.  Allen 
B.  DuMont  Labs.,  Inc.,  2  Main 
Ave.,  Passaic,  N.   J. — Radio  Today. 


Modulation  indicator 

*  Gas-filled  percentage  modula- 
tion indicator  for  amateur  trans- 
mitters. Fluoresces  green  when 
modulation  is  less  than  100.  As 
percentage  raises,  green  column 
rises  in  tube.  Tube  flashes  red 
when  modulation  exceeds  100  per 
cent.  Connects  to  tank  coil  through 
a  small  variable  condenser.  Modu- 
lite  lists  at  $4.  Acoustic  Consult- 
ants, Inc.,  RKO  Bldg.,  Rockefeller 
Plaza,  New  York,  N.  Y. — Radio 
Today. 


Gas  engine  charger 

*  Motor  type  battery  chargers 
for  6,  12,  32  volt  power  systems. 
Push-button  type  starter  eliminates 
cranking.  Generator  shaft  on  ball 
bearings.  Charging  rate  adjusted 
by  varying  speed  of  motor.  V-pul- 
ley  to  drive  external  machines. 
Operating  cost  about  1  cent  an  hour 
200-250  watts  output.  Midwest  Mfg. 
Co.,  S.  13th  and  Kentucky  Aves., 
Sheyboygan,  Wis. — Radio  Today. 


Automatic  soldering  iron 
stand 

*  Transformer-operated  auto- 
matic soldering  iron  stand.  Cuts 
down  power  loss  during  idle  time. 
Prevents  oxidation  of  tip.  Pilot 
light  indicator.  Switch  operates 
automatically  when  iron  is  placed 
on  stand.  For  irons  up  to  150 
watts.  List  $11.50.  Cole  Radio 
Works,  86  Westville  Ave.,  Caldwell. 
N.  J. — Radio  Today. 


Aircraft  transmitter 

*  Six-frequency  transmitter  for 
aircraft.  Weighs  only  27  pounds 
complete  with  dynamotor.  For 
phone  or  1000-cycle  modulated  tel- 
egraph use.  100  per  cent  modulat- 
ed. Output  of  20  to  30  watts.  Fre- 
quencies selected  from  a  single 
switch.  Lear  Developments,  Inc., 
Building  31,  Roosevelt  Field,  Min- 
ola,  L.  I.,  N.  Y. — Radio  Today. 


Animated  display 

*  Each  spell-o-tex  display  com- 
prises glass  panel,  holder,  reflector 
and  electrical  unit  with  attachment 
cord,  ready  for  use.  Special  vacuum 
letters  and  figures  are  merely 
pressed  in  place  on  the  glass  panel. 
Letters  are  available  in  one  inch 
and  1%"  sizes,  in  different  colors, 
and  come  in  scientifically  selected 
fonts  mounted  in  permanent  file 
books.  Besbee  Products  Corp.,  Tren- 
ton, N.  J. — Radio  Today. 


Photo-cell  electric  alarm 

*  Portable  elec,tric  eye  burglar 
alarm.  Installed  easily.  Complete 
in  2  units.  Cannot  be  shut  off  by 
pulling  out  electric  cord.  Light 
unit  operates  up  to  50  feet  away 
from  eye  unit — invisible  light  beam. 
Teletouch  alarm— list  $74.50.  Tele- 
touch  Industries,  Inc.,  37  W.  54th 
St.,  New  York,  N.  Y. — Radio  Today. 


Aerovox  auto  radio  noise 
condenser 

*  Condenser  unit  designed  for 
mounting  on  car  generator  for 
suppressing  commutator  noise. 
Grounded  bottom  bracket  and  top 
terminal  lug.  V2  mike  capacity 
with  10'0-volt  rating.  Type  1122 — 
list  40  cents.  Aerovox  Corp.,  70 
Washington  St.,  Brooklyn,  N.  Y  — 
Radio  Today. 


60-watt  amplifier 

*  Five-channel  input  amplifier 
having  60  watts  output.  Uses  4 
6L6G  output  tubes.  Volume  range 
compression  and  expansion.  Bass 
and  treble  compensators.  Inverse 
feed  back.  Gain  of  140  d.b.  Out- 
put impedances  50-500  ohms.  Model 
460.  Bell  Sound  Systems,  Inc., 
Columbus,  Ohio — Radio  Today. 


Universal  sound  system 

*  AC  and  6-volt  sound  system 
with  phonograph  turntable.  Power 
output  of  25  watts.  Beam  power 
output  tubes.  Acorn  type  crystal 
mike.  Dual  12-inch  P.M.  speakers. 
Two  mike  and  two  phono  inputs. 
Dual  tone  controls.  Allied  Radio 
Corp.,  833  W.  Jackson  Blvd.,  Chi- 
cago,   111. — Radio   Today. 


IHUiL-JmmL 


U-H-F  transmitting 
condensers 

*  Split-stator  type  condensers 
for  ultra-high-frequency  use.  Rotor 
connection  placed  at  center  of  ro- 
tor. Closed  circuit  loops  in  frame 
avoided  by  insulating  tie  rods 
from  frame.  In  all  popular  sizes 
used  in  transmitter  operating 
above  10,000  KC.  Bud  Radio,  Inc., 
5205  Cedar  Ave.,  Cleveland,  Ohio— 
Radio  Today. 


28 


Radio1  Today 


Centralized  sound  system 

*  Low-priced  sound  system  for 
schools  and  institutions.  All-wave 
radio  tuner,  master  and  emergency 
announcement  switch.  Visual  vol- 
ume level  indicator.  Class  A  am- 
plifier— tone  compensator.  Provi- 
sion for  up  to  32  classroom 
switches.  Talk-hack  feature  from 
all  rooms.  Model  S-82  comes  with 
PM  speakers  for  8  classrooms. 
Mounts  in  metal  cabinet  with  door 
and  lock.  David  Bogen  Co.,  663 
Broadway,  New  York,  N.  Y. — 
Radio  Today. 


Telescopic  view  finder 

*  Telescopic  view  finder  for  use 
on  the  Univex  Cine  "8"  camera. 
Attaches  to  the  camera  between  the 
lens  and  lens  mount.  Gives  a  bril- 
liant, clear  view  of  the  subject  be- 
ing photographed.  Universal  Cam- 
era Corp.,  32  "W.  23rd  St.,  New 
York,  N.  Y. — Radio  Today. 


Nokoil  P.M.  speaker 

*  Permanent  magnet  dynamic 
speaker  unit  with  exceptionally 
high  efficiency.  12-inch  size— ca- 
pable of  handling  20  watts  contin- 
uously. Low-freq  type  covers  50- 
3,500  cycles,  standard  type  60-5,000, 
wide  range  unit  60-7,500  cycles. 
Model  N12HL.  Wright-DeCoster, 
Inc.,  St.  Paul,  Minn. — Radio  Today. 


EJectronometer  tube  tester 

*  Emission  type  radio  tube 
checker.  Proper  loads  to  all  types 
of  tubes.  Shows  up  leakage  and 
tests.  Noise-test  pin  jacks  for 
headphones.      Line    voltage    check 


and  adjustment.  Free-point  tube 
analysis  system.  Fused  plug.  Large 
square  meter  with  English  reading 
scale.  Portable,  counter,  panel 
type  mountings.  Model  510 — net 
$29.95.  Precision  Apparatus  Corp., 
821  E.  New  York  Ave.,  Brooklyn, 
N.  Y. — Radio  Today. 


Executone  interphone 

*  10-station  fully  interselective 
interphone  system  which  permits 
up  to  five  simultaneous  conversa- 
tions. Talk-listen  switch  optional. 
Uses  headphone  for  confidential 
conversations.  Automatic  busy 
signal  indicator.  Can  call  station 
whether  or  not  power  is  on  at  re- 
mote point.  Model  1000 — list  $45 
per  station.  Executone,  Inc.,  415 
Lexington  Ave.,  New  York,  N.  Y. — 
Radio  Today. 


Hi-fi  hood  aerial 

*  Auto  radio  antenna  designed 
for  mounting  on  top  of  hood.  Not 
affected  by  rain,  snow,  sleet,  etc. 
Wheel  and  motor  static  eliminated. 
No  exposed  wires  or  connections. 
Chrome  plated.  Four  sizes  to  fit 
any  car.  American  Injector  Co., 
Detroit.   Mich. — Radio   Today. 


Lug  and  terminal  assortment 

*  Package  of  400  assorted  lugs 
and  terminals  for  radio  service  and 
experimental  work.  Hot  tinned  for 
easy  soldering.  Contains  all  types 
of  stampings  used  in  radio  work. 
Priced  at  $1  postpaid.  Zierick  Mfg. 
Corp.,  385  Gerard  Ave.,  New  York, 
N.  Y  —  Radio  Today. 


Zenith  table  set 

•  Six-tube  AC-DC  table  type  re- 
ceiver in  moulded  cabinet.  Tunes 
broadcast  band.  Tuning  and  vol- 
ume control  arranged  on  concen- 
tric shafts  with  dual  knobs.  Dy- 
namic speaker.  Model  6D311  il- 
lustrated. Other  models  available 
with  push  button  tuning  in  table, 
console  and  chairside  cabinets. 
Zenith  Radio  Corp.,  6001  Dickens 
Ave.,  Chicago,  111. — Radio  Today. 


Clarion  sound  system 

+  20-28  watt  universal  sound 
system  for  6-volt  and  110  AC  op- 
eration. Available  with  or  without 
phono  turntable  and  pick-up.  Uses 
two  12-inch  speakers  with  parabolic 
reflectors  supplied  with  50  feet  of 
cable.  Hand  mike.  Inverse  feed- 
back, mixing  and  fading  facilities. 
Model  C-159 — list  $168  less  phono 
attachment.  Transformer  Corp.  of 
America,  69  Wooster  St.,  New  York, 
N.  Y  —  Radio  Today. 


It      • — . — «,  . 

.    _j  Hi    __   -    j 

Operadio  sound  system 

+  14-watt  sound  system,  with 
remote  volume  control.  Illuminat- 
ed controls.  Beam  power  output 
stage.  3-channel  Input.  Two  12- 
inch  heayy  duty  P.M.  speakers. 
Lightweight  and  compact.  Attrac- 
tive gray  carrying  cases.  Model 
414.  Operadio  Mfg.  Co.,  St.  Charles, 
111. — Radio   Today. 

Flexo-fiddler  tool 

*  Insulated  tool  with  flexible 
shaft  for  starting  hard  screws, 
picking  up  objects  in  inaccessible 
places,  etc.  Also  will  grip  tube 
prongs,  socket  contacts,  etc.,  and 
provide  a  self-holding  contact.  In- 
sulated lead  taken  off  at  top  of 
prod.  List  $1.  Atlas  Sound  Corp., 
1451  39th  St.,  Brooklyn,  N.  Y  — 
Radio  Today. 


May,  1938 


29 


BASIC  PRINCIPLES  APPLIED  TO  DYNAMIC  TESTING 

How  harmonic  distortion  is  caused  by  radio  tubes 


By   VINTON    K.    ULRICH, 
{Service  Editor,  Radio  Today) 

Id.  anything  as  complicated  at  radio 
testing  and  servicing,  it  is  essential 
that  the  repair  man  always  know 
what  he  is  doing  and  why.  Working 
in  the  dark  or  just  following  a  set 
of  established  rules  without  knowing 
what  is  behind  them  usually  results 
in  a  loss  of  time  and  money. 

In  dynamic  testing  a  test  procedure 
will  be  developed  for  the  serviceman, 
but  it  is  also  our  intention  to  show 
the  radioman  why  such  tests  will  be 
helpful  and  why  certain  symptoms  are 
the  result  of  certain  cpnditions  in 
the  radio  set. 

Types  of  distortion 

Aside  from  cases  where  the  radio 
set  is  dead,  many  of  the  radioman's 
problems  have  to  do  with  correction 
of  distortion  introduced  in  the  radio 
set.  This  distortion  takes  two  dis- 
tinct forms — one  is  harmonic  distor- 
tion which  has  the  characteristic  of 
introducing  notes  or  sounds  (fre- 
quencies) not  present  in  the  original 
sound.  The  second  form  of  distor- 
tion is  known  technically  as  ampli- 
tude or  frequency  discrimination.  The 


VOLTAGE 
VS 

CURRENT 

ONE    OHM 
RESISTOR 


7 

/ 

/ 

FIG    1 

z 

P 

1          2          3         4          5          6         7 
VOLT  S 

p  VOLTAGE 

L20—  VS RL.-QJ 

t  CURRENT  / 


FIG  3      RL  =  2RP 


-6  -4  -2  -0 

GRID     VOLTS 


serviceman  knows  it  better  as  audio 
frequency  response  of  the  radio  set. 
This  form  of  distortion  is  the  oppo- 
site of  harmonic  since  it  eliminates 
or  attenuates  some  of  the  frequencies 
which  were  present  in  the  original 
sound. 

Since  the  human  ear  has  a  tendency 
to  supply  the  frequencies  even  though 
they  are  not  present,  frequency  dis- 
crimination is  not  very  serious.  But  on 
the  other  hand  harmonic  distortion 
is  extremely  annoying  to  the  human 
ear  when  it  exceeds  a  certain  value. 
(There  is  a  third  form  of  distortion 
known  as  phase  distortion,  but  in 
radio  reception  it  is  of  little  conse- 
quence— although  in  television  it  be- 
comes very  important.)  Other  radio 
set  difficulties  such  as  noise  (internal) 
and  intermittents  will  be  dealt  with 
in  the  series  of  articles  at  a  later 
date  although  they  will  be  omitted 
from  this  discussion. 

Harmonic  distortion 

Harmonic  distortion  in  a  radio  set 
can  usually  be  traced  to  the  vacuum 
tube  and  its  associated  circuits.  When 
the  circuits  are  not  properly  handled 
or  get  out  of  adjustment,  the  radio 
tube   is  a  prolific  source  of  harmonic 


VOLTAGE 

VS 
CURRENT 


JREGI0N    OF 
[DISTORTION 


^ 

-Q^ 

VOLTAGE 

i            -\ 

< 

1     .../>+l 

I         1 

-  5    -4 

3    -2      -1        1 

NEGATIVE 
GRID 
BIAS 

■* ►■ 

)        1        2 

FIG  4 

Fig.  1  shows  linear  or  straight-line  characteristic.    Fig.  2  is  a  curved  or  non-linear 

characteristic.     Fig.  3  illustrates  how  increasing  the  load  resistance  increases  the 

linear  portion  of  curve.    Fig.  4  is  the  application  of  a  signal  voltage  to  the  grid  of  a 

negatively-biased  tube— instantaneous  voltage  is  sum  of  the  signal  and  bias. 


distortion  because  it  is  a  non-linear 
device  under  such  conditions.  Resis- 
tors, condensers,  and  air-core  coils 
themselves  do  not  introduce  distor- 
tion for  they  are  linear  circuit  ele- 
ments. Iron-core  coils  and  trans- 
formers may  introduce  harmonic 
distortion  because  of  the  non-linear 
characteristics  of  the  magnetic  ma- 
terials. 

A  linear  device  or  circuit  element 
may  be  defined  as  one  which  reacts 
in  direct  proportion  to  the  applied 
current  or  voltage  (for  any  single 
frequency).  In  a  resistor,  the  voltage 
drop  is  always  proportional  to  the 
current.  Double  the  voltage  and  twice 
as  much  current  flows  through  it.  If 
we  were  to  plot  (Fig.  1)  the  voltage- 
current  characteristic  of  a  resistor,  a 
straight  line  (linear  characteristic) 
would  result. 

On  the  other  hand,  radio  tubes  have 
curved  characteristics  if  a  large  range 
of  voltages  are  considered  and  are 
therefore  non-linear  as  shown  in  Fig. 
2.  When  used  in  a  radio  set,  it  is 
essential  that  the  vacuum  tube  be 
operated  on  the  linear  or  straight-line 
portion  of  its  characteristic — it  is  in 
this  way  that  distortion-free  amplifica- 
tion and  detection  is  achieved.  And 
when  a  radio  tube  starts  distorting, 
it  means  that  either  the  tube  is  over- 
loaded or  that  it  is  operating  on  a 
curved  portion  of  its  characteristic. 

Before  going  into  the  actual  dy- 
namic radio  servicing  procedure,  the 
operation  of  the  vacuum  tube  from  a 
theoretical  angle  will  be  discussed, 
since  it  will  aid  understanding  dy- 
namic testing. 

Linear  characteristics 

Vacuum  tubes  used  for  amplifica- 
tion and  detection  are  operated  on 
linear  portions  of  their  characteris- 
tics. This  operation  is  determined  by 
the  applied  voltages  and  load  resist- 
ance (or  impedance).  In  Fig.  3  a 
set  of  tube  curves  is  given  for  vari- 
ous values  of  load  resistances.  Note 
that  for  a  given  plate  voltage,  the 
optimum  grid  bias  value  to  get  opera- 
tion on  the  linear  portion  is  depend- 
ent upon  the  plate  load  resistance. 
The  linear  portions  of  the  curve  are 
drawn  in  heavy  lines  while  the  non- 
linear are  shown  in  dotted  lines. 

When  a  tube  is  employed  as  an 
amplifier,  the  grid  is  normally  fixed 
at  a  certain  negative  DC  voltage.  The 
AC  signal  to  be  amplified  is  super- 
imposed on  the  negative  bias  value — 
thus  the  grid  swings  about  the  bias 
point  in  accordance  with  the  AC  volt- 
age variations.  This  is  shown  in 
Fig.  4. 

Usually  the  negative  and  positive 
peaks    of    the    AC    signal    are    about 


30 


Radio  Today 


equal  in  magnitude.  This  means  that 
If  the  maximum  possible  voltage  han- 
dling capacity  is  to  be  obtained  from 
an  amplifier,  it  should  be  biased  in 
the  middle  of  its  linear  characteristic 
(neglecting  that  portion  which  lies 
in  the  region  of  positive  grid  volt- 
ages). This  should  be  quite  obvious, 
for  if  a  bias  point  other  than  the  cen- 
ter of  the  linear  portion  is  used,  the 
maximum  voltage  capability  of  the 
tube  is  limited  by  the  shorter  section 
of  the  linear  part  of  the  curve.  If 
the  tube  operates  on  the  curved  sec- 
tion distortion  results. 

Actually  the  linear  portion  of  a 
tube  characteristic  is  less  than  shown 
in  the  diagrams,  but  for  all  practical 
purposes  the  tube  is  linear  over  the 
range  indicated.  Generally  speaking, 
when  an  amplifier  tube  is  operated  at 
the  center  of  its  linear  characteristic, 
the  distortion  introduced  by  the  tube 
becomes  less  as  the  signal  voltage  be- 
comes less.  This  means  that  if  the 
tube  is  biased  for  minimum  distortion 
with  a  large  signal,  the  bias  is  okay 
for  small  signals.  This  principle  will 
be  widely  employed  in  the  dynamic 
testing  procedure. 

The  amplification  characteristic  of 
a  tube  is  shown  in  Fig.  5  for  a  tube 
operated  at  various  biases  and  signal 
swings.  In  5-a  the  tube  is  biased  in 
the  mid-point  of  the  linear  charac- 
teristic and  the  signal  swing  is  equal 
to    the    bias    voltage.      5-b    shows    the 


signal  applied  when  the  grid  bias  is 
decreased  one-third  and  5-c  shows  the 
case  where  the  bias  is  increased  by 
one-third.  In  both  b  and  c,  distortion 
is  the  result.  Fig.  5-d,  e,  and  f  are 
for  the  same  biases  but  the  grid  swing 
is  reduced  to  one-half  of  its  original 
value.  Note  that  there  is  no  distor- 
tion of  the  smaller  grid  signal. 

Overloading 

In  addition  to  harmonic  distortion 
introduced  by  the  tube,  often  the  tube 
when  operating  with  too  high  a  volt- 
age swing  causes  distortion  to  occur 
in  other  stages  of  the  set.  If  the  grid 
swing  is  great  enough  to  cause  the 
tube  to  draw  grid  current,  distortion 
may  occur  in  the  preceding  amplifier 
stage  because  of  the  loading  effect  of 
grid  current  during  the  peaks  when 
the  grid  is  positive.  Also  if  the  tube 
following  the  stage  is  driven  too  hard, 
It  may  overload  the  driving  stage 
and  cause  it  to  distort.  These  cases 
will  be  taken  up  in  later  articles  to 
appear  in  Radio  Today. 

So  far  no  mention  has  been  made 
of  the  power  output  capability  of  an 
amplifier.  The  discussion  has  been  in 
terms  of  both  voltage  and  power  out- 
puts. When  it  is  desirable  to  have 
the  maximum  power  output,  the  volt- 
age output  is  not  considered.  In  any 
electrical  device  maximum  power  out- 
put is  obtained  when  the  internal 
(plate  resistance)   is  equal  to  the  ex- 


ternal load  (load  resistance).  In  radio 
tubes  this  condition  usually  causes 
considerable  distortion.  In  fact  with 
triodes,  the  maximum  undistorted 
power  output  is  obtained  when  the 
load  is  equal  to  twice  the  plate  re- 
sistance of  the  tube — this  is  contrary 
to  the  erroneous  assumption  of  many 
servicemen  that  the  resistances  should 
be  equal. 

Referring  back  to  Fig.  3,  it  can  be 
seen  that  as  the  load  resistance  is  in- 
creased, the  linear  portion  of  the  tube 
characteristic  becomes  greater.  There- 
fore, when  the  load  resistance  is  twice 
the  plate  resistance,  a  greater  voltage 
swing  is  possible  before  distortion  oc- 
curs. This  larger  voltage  gives  a 
greater  undistorted  power  output  even 
though  the  tube  and  load  resistances 
are  not  equal. 

MASTER  AERIAL  INSTALLATIONS 

Servicemen  everywhere  should  in- 
vestigate the  possibility  of  selling  and 
installing  master  aerial  systems  in 
both  private  residences  and  apartment 
buildings.  The  saturation  in  this  field 
is  negligible — only  a  small  fraction  of 
apartment  houses  have  suitable  an- 
tenna systems  and  none  of  the  private 
residences  use  master  systems. 

In  this  day  of  two  or  even  more  ra- 
dios per  home,  the  antenna  situation 
becomes  rather  involved.  No  home 
owner  wants  a  number  of  aerials  clut- 


Fig.  5 — "A"  represents  the  operation  of  a  tube  over  the  entire  linear  portion  of  the  characteristic.  "B"  and  "C"  illustrate  distor- 
tion resulting  from  operation  on  non-linear  part  of  curve.  "E,"  "F,"  "G"  show  that  with  small  signals  distortion  is  usually- 
absent. 


May,  1938 


31 


SERVICE  NOTES 


50'  TO  75'    LONG 


LIGHTNING 
ARRESTER 
GROUNDED 


ALL  METAL  STANOAROS 


tering  up  his  residence.  Yet  unless 
each  radio  has  a  satisfactory  antenna, 
it  is  impossible  for  the  sets  to  perform 
at  peak  efficiency.  A  master  aerial  sys- 
tem is  the  logical  answer  to  such  a 
situation. 

Master  aerials  for  private  homes 

And  even  if  the  home  has  but  one 
radio,  a  master  aerial  system  with  out- 
lets in  each  room  will  provide  maxi- 
mum service  from  the  set  since  it  can 
be  moved  from  room  to  room  and  al- 
ways have  proper  aerial  connections. 
And  if  the  radio  dealer  has  sold  a  mas- 
ter system,  he  has  an  excellent  argu- 
ment to  sell  additional  sets  for  the 
customer  already  has  solved  the  an- 
tenna problem  and  is  ready  for  expan- 
sion. 

To  tell  the  radioman  of  the  advan- 
tages of  a  master  aerial  system  in 
apartment  buildings  would  be  mere 
repetition  of  already-known  facts.  Un- 
fortunately, but  a  few  radiomen  know 
how  to  estimate  the  cost  of  installing 
the  systems  although  they  may  have 
sufficient  knowledge  to  do  a  good  in- 
stallation job.  And  to  make  a  profit, 
the  serviceman  must  know  what  the 
costs  will  be — particularly  from  the 
labor  viewpoint. 

The  engineering  department  of 
Amy,  Aceves  and  King  has  supplied 
Radio  Today  with  the  following  data 
concerning  the  installation  of  their 
Multicoupler  master  antenna  system. 
And  for  systems  employing  similar 
components,  the  time  requirements 
will  be  about  the  same. 

In  order  to  provide  suitable  pick-up 
and  conform  with  the  law,  masts  10 
to  15  feet  high  should  be  used.  Erec- 
tion of  one  10-foot,  2-inch  outside  di- 
ameter galvanized-iron  pipe  standard 
on  a   flat   roof,   that  is   fastened  to   a 


parapet  wall  will  take  about  2  hours' 
time.  The  erection  of  a  15-foot  pipe  on 
an  irregular  roof  or  penthouse  wall 
will  consume  about  3  hours. 

Stringing  the  aerial  wire  and  insert- 
ing the  antenna  transformer  will  nor- 
mally take  about  an  hour.  Dropping 
the  downlead  on  the  outside  of  the 
building,  installing  a  3-inch  stand-off 
insulator  should  be  figured  at  about 
20  minutes  per  outlet. 

Installing  set  couplers 

Installation  of  one  multicoupler  next 
to  a  riser  through  a  wooden  window 
frame  takes  about  one-half  hour.  If 
steel  or  casement  windows  are  en- 
countered the  time  is  increased  to 
three-quarters  of  an  hour. 

Usually  the  customer  wants  to  have 
the  radio  set  connected  to  the  coupler 
which  is  located  just  below  the  win- 
dow sill.  About  half  an  hour  should 
be  figured  for  this  task  since  it  is  also 
necessary  to  test  the  receiver  and  see 
that  all  is  okay. 

After  the  job  has  been  installed, 
there  is  bound  to  be  a  small  amount  of 
service  which  must  be  given  without 
additional  charge.  Good  business  prin- 
ciples dictate  that  this  charge  be  in- 
corporated in  the  original  estimate. 

An  examination  of  the  job  will 
quickly  determine  the  proper  amount 
of  materials  which  must  be  allowed 
for.  Be  sure  to  allow  for  an  ample 
amount  of  transmission  line. 

Sample  estimate 

The  following  is  a  sample  estimate 
for  a  single  system  on  one  side  of  a 
10-story  building  having  wooden  win- 
dow frames  providing  connections  to 
10  apartments  and  allowing  12-feet  per 
story. 


Bob  Andre  of  the  Gulfport  (Miss.)  Battery  Shop  believes  in  keeping  a  neat  shop. 
Note  Supreme  certificate  on  the  wall  showing  that  the  shop  is  adequately  equipped. 


View  showing  the  simplicity  of  master 

antenna     installations     using     outside 

wiring. 

Time   required  for  installation 

hours 
Installation   of  two  10-ft.  masts..   4 
Installation  of  downlead  (10  apts)   3% 
Installation   of  aerial  and  trans- 
former       1 

Installation   of   couplers 5 

Connections  to  radio  sets 5 

Subsequent  free  service   5 

Total  time   charged 23% 

Materials 
150-ft.  weather-proofed  trans,  line 
10  radio  set  couplers  (noise  reducing) 
1  antenna     transformer     (noise    re- 
ducing) 
1  doz.  3-inch  stand-off  insulators 
30  ft.  2-in.  iron  pipe  and  fittings 
100  ft.  No.  14  or  heavier  antenna  wire 
4  antenna  insulators 

Guy  wire  for  masts  if  required 
150  ft.  twisted  telephone  wire  for  con- 
nections to  sets 
1  lightning    arrestor    (approved    by 

underwriters) 
This  23%-hour  charge  is  figured  at 
the  labor  rates  for  the  locality  where 
the  work  is  done.  Naturally  there  is  a 
mark  up  to  allow  for  overhead,  selling 
expenses,  profit,  etc.  In  addition  the 
materials  should  be  charged  for  at  a 
suitable  profit. 

Generally  speaking  where  10  or  more 

couplers  are  installed  for  each  aerial 

the   prices   range   from  $4.00   to   $5.00 

per  outlet.    Because  of  the  difference 

(To  page  36) 


32 


Radio  Today 


-&  MlfiHTIEST  MIDGETS 


Cat. 

Cap. 

Working 

List 

Metal 

Tube 

No. 

Mtd. 

Voltage 

Price 

Diameter 

Length 

TA-10 

10 

25 

SO. 40 

9/16" 

1-5/8" 

TA-25 

25 

25 

0.50 

9/16" 

1-5/8" 

TA-525 

25 

50 

0.55 

5/8" 

1-5/8" 

UT-41 

4 

150 

0.40 

5/8" 

1-5/8" 

UT-S1 

8 

150 

0.45 

5/8" 

1-5/8" 

UT-121 

12 

150 

0.50 

5/8" 

1-5/8" 

UT-161 

16 

ISO 

0.55 

11/16" 

1-5/8" 

UT-201 

20 

150 

0.60 

3/4" 

1-5/8" 

UT-401 

40 

150 

0.65 

7/8" 

1-5/8" 

UT-42 

4 

250 

0.45 

9/16" 

1-5/8" 

UT-82 

8 

250 

0.50 

5/8" 

1-5/8" 

UT-122 

12 

250 

0.65 

11/16" 

1-5/8" 

UT-U2 

16 

250 

0.75 

3/4" 

1-5/8" 

UT-43 

4 

350 

0.50 

5/8" 

1-5/8" 

UT-83 

8 

350 

0.55 

11/16" 

1-5/8" 

UT-123 

12 

350 

0.70 

3/4" 

1-5/8" 

UT-4 

UT-8 

UT-12 

UT-16 

UT-20 


4 
8 
12 
16 
20 


450 
450 
450 
450 
450 


0.55 
0.60 
0.75 
0.90 
1.00 


DUAL  CARDBOARD  TUBULARS,  TOO 

TA-100  10-10 
TA-212  12-12 
TA-216  16-16 
TA-816  8-16 
UT-88       8-8 


FIVE  YEARS  AGO,  Sprague  brought  out  the  first  small 
2V2"  600-Volt  Condensers  .... 

Today,  Sprague  scores  again  with  a  revolutionary  new 
"midget"  development — Sprague  ATOMS.  These  are  un- 
questionably the  smallest,  most  reliable  and  the  most 
complete  line  of  tubular  drys  on  the  market. 

ATOMS  are  guaranteed  to  have  low  leakage,  exceptional 
shelf  life  and  to  withstand  high  surges.  Use  'em  without 
fear  of  failure.  You  don't  need  any  manuals.  All  you  have 
to  know  is  the  correct  capacity  and  voltage. 

The  unusually  small  size  and  amazing  durability  of 
Sprague  ATOMS  are  made  possible  by  an  exclusive  Sprague 
etched  foil  process.  They  are  hermetically  sealed — yet  are 
absolutely  protected  against  "blow-ups"  by  an  exclusive 
Sprague  design  feature. 

Sprague  engineering  supremacy  as  maintained  for  years 
in  the  set  manufacturing  trade  is  now  brought  to  bear  in 
full  force  in  the  jobbing  business.  Cash  in  on  it!  Use 
ATOMS  universally! 

SPRAGUE  PRODUCTS  COMPANY 

NORTH  ADAMS    •    MASSACHUSETTS 


For   quick,  easy    replacements  "You   Can   Get  At   'Em  With  SPRAGUE  ATOMS' 
May,  1938  33 


ALL-PURPOSE  MIKE? 

(Continued  from  page  20) 

ous  properties  that  a  microphone  is 
required  to  have  for  various  P.A.  jobs, 
and  see  how  thoroughly  the  velocity 
with  acoustic  compensator  fills  the  re- 
quirements. A  well-designed  velocity 
without  an  acoustic  compensator  fills 
all  the  requirements  below — except  the 
acoustic  adjustment  feature  in  point  1. 
The  properties  will  be  given  as  closely 
as  possible  in  their  order  of  importance 
for  P.A.  installations. 

Natural  reproduction 

1.  Natural  reproduction  —  natural 
period  of  moving  ribbon  element — 10 
cps.  Harmonic  distortion  zero  (only 
type  microphone  without  harmonic  dis- 
tortion). Frequency  response  of  micro- 
phone flat  over  entire  audio  range. 
Acoustic  compensator  permits  simple 
adjustment  to  suit  various  tastes,  per- 
formers, speaker  equipment  and  room 
conditions.  No  peaks,  harmonic  dis- 
tortion or  any  other  undesirable  ef- 
fects are  introduced  by  the  acoustic 
compensator.  (Even  best  dynamics 
have  a  decided  peak  in  the  audio 
range.  Lower  priced  dynamics  nave 
tremendous  peaks.  Lower  priced  crys- 
tals have  decided  peaks — only  higher 
priced  crystals  have  small  peaks.  Ve- 
locity is  the  only  P.A.  microphone 
without  any  peaks.) 

2.  Feedback — A  minimum  in  veloc- 
ity microphones,  because  (a)  its  zero 
pickup  over  20°  angle  in  plane  of  rib- 
bon (not  whole  side)  and  (b)  flat  re- 
sponse without  peaks  —  microphones 
usually  feedback  on  peaked  frequen- 
cies. 

3.  Angle  of  pickup  —  Contrary  to 
popular  conception,  the  velocity  has 
the  widest  angle  of  useful  pickup,  as 
shown  in  diagram.  Useful  pickup  an- 
gle  is   the   angle   having  a   frequency 


discrimination  of  less  than  50  per  cent. 
The  velocity  useful  pickup  angle  is 
120°  front  and  back.  Diaphragm  micro- 
phone has  useful  angle  of  60°  in  front 
for  6000  cycles.  By  swinging  the  ve- 
locity with  the  ribbon  parallel  to  the 
ceiling,  angle  of  pickup  is  360°.  Be- 
cause of  the  wide  pickup  angle  of  the 
velocity,  only  one  velocity  was  used 
to  pickup  an  entire  symphony  orches- 
tra at  Carnegie  Hall.  No  special  ar- 
rangement of  instruments  because  of 
frequency  discrimination  of  the  micro- 
phone was  required. 

4.  Output  impedance  and  cable 
lengths — Obtainable  in  high  impedance 
for  cable  lengths  up  to  75  ft.  and  oper- 
ating into  high  impedance  input.  And 
in  low  impedance  for  cable  lengths  up 
to  5000  ft.  Can  be  fed  into  high  im- 
pedance through  cable-type  trans- 
former. The  combination  of  the  low 
impedance  velocity  and  cable  type 
transformer  permits  operating  into 
low  or  high  impedance  input  and  any 
cable  length  in  their  case  up  to  5000 
ft.  (Crystal  microphones  available  in 
only  high  impedance  and  therefore 
limited  in  cable  length.  Better  grade 
of  dynamics  usually  only  available  in 
low  impedance.) 

Parallel  mikes 

5.  Microphones  in  parallel  or  series 
— Any  number  up  to  four  velocities 
can  be  connected  into  one  input  either 
in  series  or  parallel.  Especially  im- 
portant for  stage  pickup,  etc.  As  many 
as  twelve  velocities  can  be  fed  into  one 
amplifier.  (Crystal  microphones  re- 
quire a  separate  input  tube  for  each 
microphone.) 

6.  Effect  of  temperature,  pressure, 
humidity.  The  velocity  is  not  affected 
by  any  climatic  conditions. 

7.  Ruggedness  —  Due  to  the  light- 
ness designed  velocities  will  stand 
very  rough  handling  and  abuse.  Typi- 


cally, Station  KVOL,  Louisiana,  writes, 
"The  Amperites  have  broadcast  in  the 
rain  and  the  hot  sun.  They  have  even 
been  dropped,  but  they  always  came 
through  in  fine  shape."  (Crystals  are 
affected  by  temperature — dynamics  af- 
fected by  quick  changes  in  pressure.) 

8.  Grounding  —  Not  essential  to 
ground  in  all  cases  with  a  velocity. 
This  is  an  especially  important  feature 
in  portable  disc  recorders,  when  it  is 
not  always  convenient  to  get  a  ground 
connection.  (Crystals  must  be 
grounded.) 

9.  Output — The  velocity  is  as  high 
in  output  as  any  other  type  micro- 
phone with  even  nearly  comparable 
frequency  response.  Microphones  with 
large  diaphragms  have  slightly — 5  db 
■ — more  output.  Large  diaphragms 
however  cause  very  large  peaks.  The 
better  microphones  of  any  type  have 
smaller  diaphragms  and  less  output 
than  the  velocity. 

10.  Adjustable  frequency  response 
— When  the  performer  is  three  feet  or 
more  from  the  microphone,  as  in  en- 
tire stage  pickups,  a  microphone  with 
an  increased  low  frequency  response 
is  most  desirable.  For  close  talking  the 
lows  should  be  attenuated.  The  lows 
can  be  accentuated  or  attenuated  in 
the  velocity  without  introducing  any 
undesirable  peaks  or  harmonic  dis- 
tortion. This  can  be  done  with  either 
acoustic  compensator  or  in  the  design 
of  the  microphone  transformer.  (Dif- 
ficult to  change  the  frequency  of  crys- 
tal or  dynamic  to  properly  take  care 
of  the  above  two  conditions). 

There  might  be  a  few  unusual  prob- 
lems that  are  encountered  by  the  P.A. 
man,  but  we  believe  the  velocity  mi- 
crophone described  above  is  99  per 
cent  universal. 

Sincerely, 

S.     RUTTENBERG 

Amperite  Company,  New  York,  N.  Y. 


SPECIFICATIONS  OF  MICROPHONES  CONTINUED  FROM  APRIL  RADIO  TODAY 

Direc- 
tional 

Freq.  Range 

Output 

Direc- 
tional \ 

Freq.  Range 

Output 

Model 

List 

Mount- 

+ or  - 

Ohms 

Cable 

Model 

List 

[ount- 

+  or- 

Ohms 

Cable 

No. 

Price 

Type 

Char. 

ing 

Cycles 

DB 

DB 

imped. 

Length 

No. 

Price 

Type 

Char. 

ing 

Cycles 

DB 

DB 

imped. 

Length 

Astatic  Microphone  Lab. 

Inc. — Youngstown.  Ohio 

PR-CL 

135.00 

Vel 

B-D 

Std 

30-14M 

NS 

61 

Cal. 

35 

D-104 

$22.50 

Cry 

U 

Std 

30-7HM 

* 

—48 

5  Meg 

8 

MB-HF 

22.50 

Velf 

B-D 

Std 

30-14M 

NS 

—50 

to  grid 

none 

D-104-H 

24.50 

Cry 

U 

Hd 

30-7HM 

* 

—48 

5  Meg. 

8 

MB-HP 

22.50 

Velt 

B-D 

Std 

30-14M 

NS 

—50 

to  grid 

none 

D-104-HS 

25.50 

Cry 

U 

Hd 

30-7  HM 

* 

— 18 

5TVleg 

8 

MB-MD 

22.50 

Velt 

B-D 

Std 

30-14M 

NS 

—50 

to  grid 

none 

D2 

25.00 

Cry 

N-D 

Std 

30-10M 

5 

—61 

5  Meg 

8 

MH-HF 

23.00 

Velt 

B-D 

Hnd 

30-14M 

NS 

—50 

to  grid 

none 

D-2-H 

27.00 

Cry 

N-D 

Hd 

30-10M 

5 

—61 

5  Meg 

8 

MH-HP 

23.00 

Velt 

B-D 

Hnd 

30-14M 

NS 

—50 

to  grid 

none 

D-2-HS 

28.00 

Cry 

N-D 

Hd 

30-10M 

5 

—61 

5  Meg 

8 

MH-MD 

23.00 

Velf 

B-D 

Hnd 

30-1 4M 

NS 

—50 

to  grid 

none 

K-2 

27.50 

Cry 

N-D 

Std 

30-10M 

3t 

—60 

5  Meg 

8 

MP-MD 

13.50 

Velt 

B-D 

Lpl 

30-14M 

NS 

—55 

to  grid 

none 

L-l 

25.00 

Cry 

N-D 

I.pl 

30-10M 

3 

— S2 

5  Meg 

25 

MS-HP* 

30.00 

Velt 

B-D 

Std 

30-14M 

NS 

—45 

to  grid 

none 

T-3 

25.00 

Cry 

S-D 

Std 

30-10M 

5 

—52 

5  Meg 

8 

MS-HF* 

30.00 

Velf 

B-D 

Std 

30-14M 

NS 

—45 

to  grid 

none 

218 

22.50 

Cry 

S-D 

Clip 

30-5  U  M 

* 

^16 

5  Meg 

8 

MS-MD* 

30.00 

Velt 

B-D 

Std 

30-14M 

NS 

—45 

to  grid 

none 

♦Rising  characteristics  above  500  C.P.S.   fRising  characteristics  above  6,000  C.P.S. 

All  obtainable  in  Chrome  at  SI. 00  extra. 

Bruno  Laboratories.  Inc- 

-30  West  15th  St 

.,  New  York,  N. 

Y. 

♦Obtainable 

with  switch  at  $1.50  extra 

.   tVelocity  microphone  based  on  molecular  cleavage. 

A 

$19.50 

Sv 

B-D 

Std 

30-14M 

NS 

—50 

to  grid 

none 

Universal  Microph 

one  Co 

,  Ltd. — 424  Warren  Lane,  Inglewood,  Calif. 

HA 

23.00 

Sv 

B-D 

Hnd 

30-14M 

NS 

—50 

to  grid 

none 

W 

$  3.00 

Carb. 

S-D 

Lpl 
S£ 

200-2M 

5 

—38 

200 

None 

SP 

13.50 

Sv 

B-D 

Lpl 

30-14M 

NS 

—55 

to  grid 

none 

A 

15.00 

Carb 

S-D 

100-3.5M 

3 

—45 

200 

None 

SP-C 

14.50 

Sv 

B-D 

Lpl 

30-14M 

NS 

—55 

to  grid 

none 

XX 

10.00 

Carb 

S-D 

St 

100-4M 

3 

—50 

400 

None 

ws 

30.00 

Sv 

B-D 

Std 

30-14M 

NS 

-^15 

to  grid 

none 

XI 

7.50 

Carb. 

S-D 

St 

100-4M 

3 

—50 

400 

None 

WS-S 

31.50 

Sv 

B-D 

Std 

30-14M 

NS 

—45 

to  grid 

none 

BB 

25.00 

Carb 

S-D 

St 

50-5M 

3 

—50 

400 

None 

ws-cs    ; 

32.50 

Sv 

B-D 

Std 

30-14M 

NS 

—45 

to  grid 

none 

200 

10.00 

Carb 

U-D 

Hd 

150-3M 

3 

—40 

200 

6 

VD-HP 

21.00 

Vel 

B-D 

Std 

80-10M 

NS 

69 

to  grid 

none 

201 

15.00 

Carb 

U-D 

Hd 

100-4M 

3 

—55 

400 

6 

VD-HF 

22.00 

Vel 

B-D 

Std 

50  10M 

NS 

69 

to  grid 

none 

CS 

18.50 

Cry 

S-D 

St 

50-5M 

3 

—63 

5  Meg 

10 

VD-CT 

23.00 

Vel 

B-D 

Std 

80-10M 

NS 

69 

to  grid 

none 

202 

18.50 

Cry 

U-D 

Hd 

50-5M 

3 

—70 

5  Meg 

10 

VD-LI 

23.00 

Vel 

B-D 

Std 

80-10M 

NS 

69 

200 

8 

203 

22.50 

Cry 

U-D 

Hd 

50-5M 

3 

—60 

5  Meg 

10 

VR-HP 

31.00 

Vel 

B-D 

Std 

80-12M 

NS 

67 

to  grid 

none 

/N-D 
\S-D 

SW 

50-8M 

2 

—66 

♦Optional  \ 

VR-HF 

32.00 

Vel 

B-D 

Std 

50-12M 

NS 

67 

to  grid 

none 

15MM 

24.50 

X>yn 

St 

50-8M 

2 

—64 

♦Optional  J 

25 

VR-CT 

33.00 

Vel 

B-D 

Std 

80-12M 

NS 

67 

to  grid 

none 

/200\ 
\500/ 

VR-LI 

33.00 

Vel 

B-D 

Std 

80-12M 

NS 

67 

200 

8 

E 

100.00 

Cond 

S-D 

St 

35-10M 

2 

—32 

25 

WM-HP 

39.00 

Vel 

B-D 

Std 

80-12M 

NS 

65 

to  grid 

none 

/2001 
\500/ 

WM-HF 

40.00 

Vel 

B-D 

Std 

50-1 2M 

NS 

65 

to  grid 

none 

G 

84.00 

Cond 

S-D 

St 

70-7M 

2 

— 32 

25 

WM-CT 

41.00 

Vel 

B-D 

Std 

80-12M 

NS 

65 

to  grid 

none 

5MM 

24.50 

Vel 

B-D 

St 

40-10M 

2 

—64 

♦Optional 

25 

WM-LI 

43.00 

Vel 

B-D 

Std 

80-12M 

NS 

65 

to  grid 

25 

RH 

22.50 

Vel 

B-D 

St 

40-10M 

2 

—63 

♦Optional 

10 

OR-HF 

47.00 

Vel 

B-D 

Dsk 

50-12M 

NS 

65 

to  grid 

none 

AV 

44.50 

Vel 

B-D 

St 

30-12M 

1 

—60 

♦Optional 

25 

OR-LI 

49.00 

Vel 

B-D 

Dsk 

50-12M 

NS 

65 

200 

25 

Lapel 

25.00 

Carb 

S-D 

Lpl 

50-4.5M 

3 

—55 

400 

6 

PR-HF 

90.00 

Vel 

B-D 

Std 

30-14M 

NS 

61 

to  cTid 

35 

Ar-1 

35.00 

Carb 

U-D 

Hd 

200-4M 

5 

—30 

200 

4 

PR-LI 

90.00 

Vel 

B-D 

Std 

30-14M 

NS 

61 

50-200 

35 

♦Impedances  of  50,  2 

00,  500. 

Direct  to  Grid. 

34 


Radio  Today 


EVEN  the  slightest  defect — 
a  twisted  wire  ...  a  loose 
top  cap  ...  a  broken  guide  pin 
— is  enough  to  doom  any  Syl- 
vania  tube.  For  Sylvania  will 
not  risk  quality  by  making 
even  minor  repairs  on  imper- 
fect tubes. 

This  rigid  "no  repair"  policy 
assures  Sylvania  of  uniform, 
high   quality  radio   tubes   .   .   . 

See  Us  at  204-06  Ampere  Ave.,  National 


freedom  from  "duds".  It  as- 
sures you  of  satisfied  tube  cus- 
tomers— and  repeat  business. 
Remember  this:  You  can't 
buy  a  second-quality  Sylvania 
tube  ...  so  you  can't  lose  a 
customer  by  selling  him  one ! 
Hygrade  Sylvania  Corp.,  Em- 
porium,   Pa.      Cable    address : 

HYSYLVANIA,     New    York. 
Radio  Trade  Show,  Hotel  Stevens,  Chicago 


SYLVANIA 

SET-TESTED      RADIO      TUBES 


HYGRADE     SYLVANIA     CORPORATION     ALSO     MANUFACTURES     THE     FAMOUS     HYGRADE     LAMP     BULBS. 


May,  1938 


35 


RADIO  JOBBERS 


WRITE,  WIRE  OR  PHONE 
FOR  PARTICULARS 


UNIVERSAL  CAMERA  CORP. 

New  York  .  .   Chicago    .  .  Hollywood 


SERVICING 

(From  page  32) 

in  the  ability  of  various  workers,  the 
above  time  figures  are  approximate  and 
new  ones  should  be  arrived  at  from  the 
serviceman's  personal  experience.  Since 
the  chief  variable  item  cost  is  labor, 
extreme  care  should  be  taken  in  sur- 
veying the  premises,  noting  difficult 
work  to  perform,  etc.  And  in  the  case 
where  work  is  difficult  to  do,  changes 
should  be  made  if  at  all  possible,  to 
effect  lower  labor  costs. 

In  both  apartments  and  private  resi- 
dences, the  cost  of  a  master  aerial  sys- 
tem will  be  lower  than  the  total  cost 
of  separate  high-quality  noise-reducing 
antennas.  And  most  master  systems 
work  just  as  satisfactorily  on  the 
shortwaves  as  on  the  broadcast  band. 

With  the  summer  bringing  ideal 
weather  for  outside  work,  servicemen 
everywhere  should  concentrate  on 
aerial  installations. 

PRACTICAL  POLICIES  IN  SERVICING. 
BUSINESS  ACUMEN. 

A  number  of  questions  reflecting 
practical  business  problems  in  service 
work  were  asked  during  a  recent  meet- 
ing of  the  Philadelphia  Radio  Service- 
men's Association.  Charles  Golenpaul, 
general  sales  manager  of  Aerovox  Cor- 
poration, was  present  and  the  task  of 
answering  these  queries  of  practical 
policy  was  put  up  to  him,  with  the  in- 
teresting results  below: 

Guarantees  on  repairs 

I'm  given  a  job  to  service  a  radio 
set  but  first  have  to  submit  an  estimate 
of  the  cost.  I  check  the  receiver  and 
find  that  the  electrolytic  condensers 
are  defective  and  require  replacement, 
for  which  I  quote  $3.  The  customer 
then  asks:  "How  much  would  it  cost 
to  repair  the  radio  set  and  put  it  In 
shape  so  as  to  be  able  to  guarantee  the 
performance  and  service  for  six 
months?"  After  my  examination,  I 
find  that  to  agree  to  this  I  would  have 
to  charge  $6  so  as  to  cover  the  six 
months'  guarantee.  The  customer  in- 
structs me  to  go  ahead.  I  do  the  job, 
deliver  the  set,  and  collect  $6.  The 
set  plays  okay  for  three  months.  Then 
something  happens  and  I'm  called 
again.  I  examine  the  radio  and  find 
that  this  time  the  transformer  is  de- 
fective. Now  the  question  I  ask  is: 
should  I  replace  the  transformer  at 
no  charge  or  have  I  the  right  to  charge 
for  same? 

Answer:  In  the  first  place,  you  had 
no  right  to  guarantee  a  set  for  six 
months  unless  you  replaced  all  the 
parts,  because  the  original  manufac- 
turer when  he  sold  that  set  may  have 
received  ?200  but  he  didn't  guarantee 
the  set  for  more  than  90  days,  and  he 
knew  more  about  the  parts  that  were 
used  than  you.    So  my  advice  to  you 


is — always  explain  how  impossible  it 
is  to  guarantee  your  work  because  of 
the  many  complications  involved,  due 
to  parts  becoming  defective  from  causes 
such  as  heat,  dampness,  overload  and 
so  on.  As  to  whether  or  not  you  should 
replace  the  transformer  no  charge,  the 
fact  that  you  made  a  promise,  and  also 
that  your  reputation  locally  is  worth 
something,  should  compel  you  to  re- 
place the  transformer  without  charge. 
And  charge  it  up  to  experience. 

Keep  frade  secrets 

What  should  I  do  when  I'm  called 
in  to  estimate  the  cost  of  a  repair  and 
when  I  quote  what  I  consider  a  reason- 
able price,  the  owner  of  the  set  is  sur- 
prised at  the  amount?  In  my  desire 
to  convince  the  owner  that  I  am  rea- 
sonable, I  point  out  that  I  must  re- 
place an  8-mfd.  condenser,  a  400-volt 
0.25-mfd.  tubular  condenser,  and  a  10,- 
000-ohm  carbon  resistor.  The  set  owner 
then  advises  that  he  will  think  the 
matter  over.  After  waiting  several 
days,  I  follow  this  up  because  I  realize 
this  set  owner  is  deprived  of  the  use 
of  his  set.  When  I  visit  this  prospec- 
tive customer  again,  I  find  that  the  set 
is  operating.  Then  I  discover  that  the 
job  was  done  by  the  set  owner  himself. 
What  I  want  to  know  is  whether  it  is 
fair  to  me  for  this  customer  to  go  di- 
rect to  the  jobber,  buy  the  parts,  and 
make  his  own  repairs,  naturally  at  a 
considerable  saving,  after  I  went  so  far 
as  to  tell  him  what  was  wrong  and 
what  he  needed  to  fix  it  up. 

Answer:  This  one  is  easy.  The  an- 
swer is:  Don't  give  away  your  trade 
secrets.  Remember,  the  diagnosis  of 
the  trouble  is  at  least  half  the  job.  If 
you  tell  a  set  owner  what  the  trouble 
is  and  what  it  takes  to  make  the  set 
right  again,  you've  given  away  most 
of  your  value  to  him.  As  another  in- 
dication of  servicemen  giving  away 
trade  secrets,  some  go  so  far  as  to 
write  out  the  items  on  their  own  busi- 
ness card.  It  is  then  a  simple  matter 
for  the  would-be  customer  to  walk  into 
a  jobber  and  present  the  card,  posing 
as  a  serviceman,  and  getting  the  neces- 
sary parts  at  trade  discounts. 

Tube  checking 

What  can  I  do  about  the  chaps  who 
come  into  my  shop  to  get  their  tubes 
tested  or  checked,  free  of  charge  in 
keeping  with  my  advertisements,  but 
after  they  have  found  out  which  tubes 
are  no  good,  they  buy  the  replacements 
from  some  gyp  auto-supply  store? 

Answer:  Your  advertisements  offer- 
ing to  test  or  check  all  tubes  free  are 
in  keeping  with  general  practice.  How- 
ever, it  might  be  well  in  your  shop  to 
have  a  sign  stating  that  tubes  are 
tested  or  checked  free,  provided  tubes 
are  bought  in  your  shop.  Otherwise,  a 
small  service  charge  must  be  made. 
You  or  your  employee  should  be  able 
to  make  a  sale  in  replacing  those  de- 
fective tubes. 

(To  page  38) 


36 


Radio  Today 


EVERY 

RADIO  DEALER 

Can  and  Should  Sell  1  to  10 
Room  Coolers  This  Summer 


NO  NEED  to  suffer  from  heat  or  humidity  this  summer,  when  the 
Pleasantaire  Room  Cooler  offers  relief  at  such  low  cost  This  self- 
contained,  portable  air  conditioner  is  powered  by  a  refrigeration  plant 
many  times  larger  than  a  household  electric  refrigerator — yet  it  is  so 
compact  that  it  fits  in  the  window,  and  may  be  installed  in  a  few 
minutes.  It  is  entirely  adequate  for  the  average  bedroom  or  small 
office  of  200  square  feet  or  less. 

For  hot  weather  relief,  nothing  can  do  the  job  as  well  as  an  electric 
refrigeration  Room  Cooler.  In  this  field,  Pleasantaire  leads  because  it 
is  the  only  time-tested,  low  cost  unit  on  the  market. 

IT  COOLS  by  electric  refrigeration 
DEHUMIDIFIES 
FILTERS  and  VENTILATES 
CIRCULATES,  Quietly 
REMOVES  STALE  AIR 
KEEPS  OUT  INSECTS 
Pleasantaire  Conditioning  is  Healthful  Air  Conditioning 

CORPORATION 

1623  Connecticut  Ave.  Washington,  D.  C. 


Pleasantaire  lists  at 

$199.50  f.o.b.  factory. 

Sales  are  direct  to  dealers 

at   liberal  profit-making 

disc 


Write  today  for  The  Pleas- 
antaire Package  Plan,  com- 
plete story  of  Room  Cooler 
merchandising  for  the  ap- 
pliance dealer. 


V 


the  ARCTURUS 
EQUIPMENT  DEAL 

IS    THE    ANSWER    TO    YOUR 
SHOP    EQUIPMENT    PROBLEM! 

And  here  are  the  answers  to  your 
questions  about  the  Deal  itself .  .  , 

WHAT  DOES  THE  DEAL  MEAN  TO  ME? 

It  means  that  now  you  can  have  your  choice 
of  the  finest  shop  equipment  ALMOST  FREE1 

HOW  MUCH  DOWN  PAYMENT? 

LESS  than  any  other  deal  ever  offered!  On 
some  items,  the  down  payment  is  as  low 
as  $3.00!  ARCTURUS  down  payments  aver- 
age only  about  ONE-SIXTH  the  amounts 
required  by  other  deals! 

WHEN  DO  I  GET  THE  EQUIPMENT? 

Immediatelyl — no  -waiting  until  your  deal  is 
completed.  You  have  the  use  of  this  effi- 
cient,  modern   equipment  right   away. 

WHAT  IS  MY  ACTUAL  TOTAL  COST? 

Actually,  the  down  payment  is  all  you  pay 
for  the  equipment  you  get.  Your  purchases 
of  Arcturus  Tubes  take  care  of  the  rest. 
There   are   no  hidden  costs  herel 


HOW  MANY  TUBES  MUST  I  BUY? 

Tube  requirements  are  kept  at  an  absolute 
minimum.  We  don't  load  you  up  with  more 
tubes  than  you  can  use.  Many  Arcturus 
deals    require    less    than    one    tube    per    day! 

DO  TUBES  COST  MORE? 

No!  .  .  .  and  that's  important!  Not  one  cent 
has  been  added  to  standard  Arcturus  Tube 
prices.  Your  purchases,  not  your  cash,  pay 
for  your  equipment. 

WHAT  ABOUT  TUBE  QUALITY? 

You'll  never  have  to  worry  about  that! 
Radio  engineers  and  servicemen  everywhere 
agree  that  ARCTURUS  are  the  best  engi- 
neered tubes  that  money  can  buy.  For 
dependability  .  .  .  long  life  .  .  .  for  all- 
'round  brilliant  performance — you  couldn't 
offer  your  customers  better  tubes! 


FREE/  p*™^ 


Just  off  the  press  .  . 
the  new  ARCTURUS 
DEALER  HELPS 
folder,  showing  a 
brand  -  new  line  of 
sales  builders  available  to 
Arcturus  dealers.  Many  new  and 
unusual  items  —  every  one  de- 
signed to  help  you  increase  your 
tube  and  service  profits.  Send 
for  your  copy  .  .  it's  FREE! 


YOU  BE  THE  JUDGE! 

Don't  take  our  word  for  the  su- 
periority of  the  Arcturus  Equip- 
ment Deal.  Send  the  coupon 
.  .  .  NOW!  See  how  easy  it  is  to 
make  yours  "the  best  equipped 
shop  in  town" — at  almost  NO 
COST  to  you!  Compare  the 
Arcturus  Plan,  point-for-point, 
with  any  other  deal.  Then  you 
be   the  judge! 

Mail  the  Coupon! 


AiRCTyras 

i 1 

ARCTURUS  RADIO  TUBE  CO.,  Newark,  N.  J. — Without  cost  or  obligation  on 


my  part,  send  details  of  your  new  equipment  deal. 


T-7 


Name 

Street 

City State 

□  I  am  a  dealer  Qloma  serviceman     My  jobber  is. 

For  your  convenience  this  coupon  can  be  pasted  on  a  penny  postcard 


May,  1938 


37 


Every  Serviceman  Should  Inves- 
tigate How  to  Make  More 
Money  in  the  SOUND  BUSINESS 


SEE  and  HEAR  the 
BRAND  NEW  35 
WATT  SYSTEM 


WEBSTER -CHICAGO  Cordially 
Invites  You  For  a  Guest  Tour  of  Their 
Modern  Sound  Plant  When  You  Are 
In  Chicaso  at  the  JUNE  RADIO 

PARTS   SHOW... 


Introducing 
"Elimination 

of  *E.  S." 

Remote  Control 

• 

3  Microphone  Input 

Circuits 

• 

1  Phonograph  Input 

Circuit 

• 

Multi-Stage 

Regeneration 

• 

Volume  Expansion 

• 

Speaker  Impedance 

Matching  Control 

*E.S. — Ear  Strain 


Factory 
Assembly 


Laboratory:  Show- 
ing a  most  unusual 
collection  of  fine 
radio  measuring  in- 
truments. 


Display  Room: 
Demonstrating  a 
full  and  com- 
plete line  of  all 
types  of  Sound 
Equipment. 


Just  Resister  at  WEBSTER  -  CHICAGO 
Booth  No.  202-  Marconi  Blvd.  For  FREE 
Bus  Ticket  and  Pass  ! 

WEBSTER  -  CHICAGO 


WEBSTER-CHICAGO 
Section  MY-0,  n«2*J  Bloomingdale  Ave. 
Chicago,  Illinois 

Please  send  me  New  193S  Catalog. 


Name     

Address    

City State. 


SERVICING 


Several  servicemen  write  in,  pre- 
senting the  problem  of  department 
stores  advertising  that  they  will  ser- 
vice any  set  for  say  $1.75  flat.  One 
serviceman  presents  a  particular  case 
in  which  he  estimated  the  cost  of  a 
repair  job  at  $3.50.  Customer  thought 
the  price  entirely  too  high  so  took  the 
set  to  the  department  store.  When 
the  department  store  service  depart- 
ment examined  the  set,  they  estimated 
the  cost  at  $14  to  put  it  back  in  shape. 
So  the  woman  called  back  the  service- 
man and  asked  him  to  fix  the  set  for 
$3.50,  at  which  price  there  was  a  good 
profit  in  the  job.  Now  the  question  is: 
What  can  we  do  about  such  tactics? 

Answer:  You  can't  stop  the  depart- 
ment store  from  advertising  a  flat  ser- 
vice charge  of  $1.75  or  any  other  rate. 
However,  news  travels  fast.  As  the  de- 
partment store  uses  this  bait  to  get 
service  calls  and  then  jacks  up  the 
price  even  beyond  anything  a  service- 
man might  ask,  you  can  be  sure  that 
people  will  pass  the  word  around.  Es- 
pecially the  women.  The  situation  is 
bound  to  work  itself  out  to  the  satis- 
faction of  the  serviceman.  It  may  take 
time,  of  course. 

BOOK  REVIEWS 

MALLORY-YAXLEY  RADIO 
SERVICE  ENCYCLOPEDIA 

*  The  new  second  edition  of  the 
Mallory-Yaxley  encyclopedia  contains 
50  per  cent  more  pages  than  its  prede- 
cessor. In  addition  to  an  expansion 
of  previous  material  to  include  the 
1938  model  receivers,  chapters  have 
been  added  which  discuss  alignment, 
automatic  frequency  control,  automat- 
ic tuning  of  all  types,  audio  ampli- 
fier design  and  use. 

Numerous  charts  and  tables  of  value 
to  the  radio  serviceman  and  engineer 
have  been  included  in  the  second  edi- 
tion. List  price  of  the  book  is  $3.00. 
Published  by  P.  R.  Mallory  &  Co.,  In- 
dianapolis,   Ind. — Radio   Today. 

SOUND  WAVES,  THEIR 
SHAPE  AND  SPEED 

By  Dayton  C.  Miller 

+  The  shape  and  speed  of  sound 
waves  which  is  discussed  in  Dr.  Mil- 
ler's book  of  the  same  title  is  supple- 
mented by  detailed  descriptions  of 
apparatus  used  in  obtaining  these  rec- 
ords. Part  I  is  devoted  in  part  to  the 
"phonodeik,"  a  device  which  is  used 
to  photograph  the  shapes  of  sound 
waves.  There  is  also  a  chapter  on 
electric  spark  photography. 

Of  particular  interest  are  the  pho- 
tographs of  the  tones  of  various  mu- 
sical instruments  and  vocal  sounds. 
The  author  shows  how  the  various 
overtones  combine  to  determine  the 
(To  page  40) 


38 


Radio  Today 


SWING    OUT    IN    FRONT 

with  New  Ideas,  New  Contacts,  New  Developments 


Let's  Go  to  the  National  Radio  Parts  Trade  Show 


TRT  It's  your  one  opportunity  of  the  year  to  meet  the 
complete  Parts  Industry — face  to  face.  It's  the  only  time  and  place 
you  can  get  a  full,  complete  picture  of  the  "service"  business  and 
your  part  in  it.  Make  personal  contact  with  manufacturers  and 
their  factory  men — with  Jobbers,  and  fellow-Servicemen,  with 
Engineers  and  Amateurs — from  all  parts  of  the  country — all  parts 
of  the  world.  Get  the  "dope"  on  all  the  latest  developments  in 
Radio  Parts  and  Service  Equipment.  Learn  at  first  hand  what's 
ahead  for  you.  Collect  ideas  you  can  apply  profitably  to  your  own 
business — your  job — your  work.  And  have  a  good  time  doing  it,  too! 

There'll  be  35,000  square  feet  of  displays — a  complete  Radio 
Parts  City  in  itself  with  streets  full  of  new,  timely  developments. 
There'll  be  Technical  Lectures  and  Demonstrations  packed  with 
vital  information  for  you!  Four  full  days  of  important  activity  at 
Radio  Parts  City,  Stevens  Hotel,  Chicago,  Wednesday,  Thursday, 
Friday,  Saturday,  June  8,  9,  10,  11. 

This  is  the  Annual  Homecoming  for  everyone  in  the  Industry. 
You  owe  it  to  yourself  to  be  there.  Don't  let  anything  stop  you — 
just  pick  up  and  Go  .  .  .  it's  the  only  National  Radio  Parts  Trade 
Show  of  the  year.  Ask  your  Jobber  for  further  details  or  write  us. 
Cut  out  the  coupon  now,  paste  on  a  Post  Card  and  drop  in  the 
mail  for  your  Advance  Registration.  Our  Personal  Service  Bureau 
will  be  glad  to  make  all  the  arrangements  for  you. 

Sponsored  by  Radio  Manufacturers  Association 
and  Sales  Managers  Club 


National  Radio  Parts 
Trade  Show 

Radio  Parts  City,  Stevens  Hotel,  Chicago 
Wed.,  Thurs.,  Fri.,  Sat,  June  8,  9, 10,  11,  1938 


35,000  Sq.  Ft.  of  Displays  —  Radio 
Parts  and  Test  Equipment,  Ham  Sets, 
Meters,  Mikes,  Crystals,  Tools, 
Gadgets. 

Technical  Lectures  —  Modern 
Devices  and  Apparatus,  Touch  Tun- 
ing, Remote  Tuning,  Tube  Applica- 
tions, Sound -Equipment  Installation 
Methods. 

Demonstration  of  Facsimile  Ap- 
paratus— Friday  Evening,  June  10, 
Under  Auspices  of  I.  R.  E. 

Movies  of  Pitcairn  Island — Satur- 
day, June  11.  (Subject  to  arrival  of 
Films  from  the  Island.) 

Lecture  on  the  DuMont  Phasma- 
jector  (Television)  Saturday  Evening. 
All  Service  Lectures  are  a  part  of 
the  R.  S.  A.  Convention 


MAIL      THIS      COUPON       TODAY 


National  Radio   Parts  Trade  Show, 

Personal  Service  Bureau, 

53  W.  Jackson  Blvd.,  Chicago,  111. 

Please  send  Advance  Registration  Blank. 

lama   D     RETAILER 

a     SERVICE     SHOP     OWNER 
D     SERVICE    EMPLOYEE 
□     


May,  1938 


39 


JL.  The  D  A  N  D  E  E  is  the  ideal 
general-utility  electrolytic  for 
servicing  midget  AC-DC  sets  or 
for  by-pass  functions. 

JL.      Small — fits  anywhere.  No  larger 

"       than  usual  paper  tubular.     Yet 

it    packs    from   4    to    40    mid., 

depending  on  voltage.  150,  350, 

350  and  450  v.  d.c.  \v. 

Jl.       And     it's     genuine,     full-rated, 
^        long-life      capacity      and      D.C. 

working   voltage.     Positively   no 

cheating. 

.X.      Dry  electrolytic  section.     Her- 
^       metically  sealed  can.  Protected 

and  insulated  by  paper  jacket. 

Provided  with  vents. 

JL.       Ends  of  jacket  span  over  alu- 

^        minimi  can  rim.    No  chance  of 

"shorts"  if  leads  are  bent  close 

to  can.     Jacket  can't  slip  off. 

JL-  Polarity  -  indicating  red  and 
black  end  discs.  Corrosion- 
proof.  Thoroughly  aged.  la- 
dividually  tested.  Yet  costs 
only  40c  to  90c  list,  depending 
on  capacity  and  voltage. 


Ask  Your  Jobber  .  .  . 


JL.       Ask    him    to    show    you    these 
w       DANDEE   midget   electrolytics. 
Better    still,    order    an    assort- 
ment and  have  them  on   hand 
for  those  midget  set  jobs. 


FRVVW 


CORPORATION 

70  Washington  St  :       :  Brooklyn.  N.  Y. 

IL'l4IJM.).W.U;IUIJ.UJ.I.i|.I.IBIMWiM 


(From  page  38) 
tonal    quality    of   specific   musical    in- 
struments. 

Part  II  of  the  volume  is  devoted  to 
pressure,  waveform,  and  velocity  of 
sounds  from  large  guns.  While  in- 
teresting, this  latter  material  is  quite 
remote  from  the  radio  and  sound 
fields. 

While    recommending   the   book   for 


the  broadcast  engineer,  sound  equip- 
ment designer  and  radio  engineer,  we 
feel  that  it  will  also  he  found  enlight- 
ening to  others  who  are  interested  in 
what  the  wave  characteristics  of  vari- 
ous sounds  are. 

The  book  is  written  mainly  In  non- 
technical language.  Price  $2.75.  Pub- 
lished by  the  MacMillan  Co.,  60  Fifth 
Ave.,  New  York,  N.  Y. — Radio  Today. 


NEW  BOOKLETS 


*  "School  Sound  Systems  by 
Stromberg-Carlson"  is  the  title  of  a 
new  booklet  issued  by  the  Roches- 
ter, N.  Y.,  firm.  Printed  in  blue 
and  black,  and  illustrated,  it  is  rec- 
ommended by  SC  for  distribution  to 
school  board  members. 

*  The  annual  catalog  of  Uni- 
versal Microphone  Co.,  Ltd.,  Ingle- 
wood,  Calif.,  will  be  issued  this 
month,  and  will  contain  illustrated 
data  on  their  microphones,  record- 
ers and  accessories.  New  section  on 
airplane  mikes  will  be  included. 

+  Regal  Amplifier  Mfg.  Corp.,  14 
W.  17th  St.,  New  York  City,  have 
issued  a  new  4-page  booklet  on  the 
firm's  "Tokfone"  intercommunica- 
tors.  Eight  models  are  shown,  and 
sales  prospects  are  listed. 

*  Teletran  Products  Co.,  2233 
University  Ave.,  St.  Paul,  Minn., 
have  issued  a  new  20-page  booklet 
on  public  address,  accessories  and 
kits,  intercommunicators,  central- 
ized radio,  and  specialized  systems, 
This  is  catalog  No.  25. 

*  Janette  Mfg.  Co.,  556  W.  Mon- 
roe St.,  Chicago,  111.,  have  issued  a 
new  specification  and  price  sheet, 
bulletin  13-25,  and  a  new  folder 
bulletin  13-10,  on  rotary  converters 
for  radios,  amplifiers,  phonographs, 
sound  pictures,  etc. 

*  Auto  Radio  Manual  for  deal- 
ers is  now  being  issued  by  Philco. 
It  features  the  company's  1938  line 
of  auto  radios,  aerials  and  ac- 
cessories and  gives  details  on  the 
advertising  and  promotion  units  as 
well  as  the  new  sales  helps. 

+  Four  new  booklets,  of  inter- 
est to  engineers,  are  forthcoming 
from  General  Electric  Co.,  Schen- 
ectady, N.  Y.  There  are  numbers 
GEA-2003B  on  Automatic  Oil  Cir- 
cuit Reclosers,  GEA-2170A  on  Di- 
rectional Distance  Relays,  GEA- 
2426A  on  Outdoor  Oil-Blast  Circuit 
Breakers,  and  GEA-627  on  Outdoor 
Power  Switching  Equipment. 

+  "In  the  Groove  with  Victor 
Records"  is  the  title  of  a  new 
booklet  being  issued  by  RCA  Victor. 
It  is  filled  with  dope  on  swing 
bands  and  their  personnel  and 
takes  the  form  of  a  handy  refer- 
ence book  to  be  distributed  through 
dealers  to  "jitterbugs,"  "ickies," 
and  other  types  of  swing  music 
fans. 


Isolantite,  Inc.,  233  Broadway,  New 
York,  N.  Y.,  have  issued  two  new  book- 
lets. Bulletin  No.  103  has  complete 
data  on  stand-off  insulators;  No.  104 
covers  Isolantite  bushings. 

New  developments  in  public  address, 
such  as  the  new  "Storm-Proof"  Marine 
Horn,  are  described  by  the  Spring  and 
Summer  catalog  just  released  by  the 
Atlas  Sound  Corp.,  1451  39th  St., 
Brooklyn,  N.  Y.  This  Catalog  F-38 
lists  parabolic  deflector  baffles;  speaker 
enclosures,  and  housings;  P.  M.  horn 
type  driver  units;  aluminum  bell  trum- 
pets; "Velvet  Action"  microphone  floor 
and  desk  type  stands,  etc. 

"Facts  and  Hints"  on  transcription 
and  phonograph  needles  is  the  subject 
of  a  feature  folder  released  by  H.  W. 
Acton  Co.,  Inc.,  370  Seventh  Ave.,  New 
York,  N.  Y.  The  Shadowgraph  process 
for  Actone  needles  is  illustrated  and 
explained. 

Latest  edition  of  the  Taco  Master 
Antenna  System  Manual  has  appeared, 
with  information  for  surveying  build- 
ings, estimating,  installing,  testing  and 
servicing.  Copies  are  available  to  ser- 
vicemen addressing  Technical  Appli- 
ance Corp.,  17  E.  16th  St.,  New  York, 
N.  Y.  Likewise  a  new  window  poster 
on  the  master  antenna  system. 

Transformer  Corp.  of  America, 
through  the  Clarion  Institute  of  Sound 
Engineers,  have  released  the  1938-39 
catalog  of  Clarion  "Unified"  sound  sys- 
tems and  accessories.  The  two-color 
booklet  describes  and  shows  the  com- 
plete new  line,  portable  systems,  mikes 
and  speakers,  intercommunicating  sys- 
tems, the  new  "Nemotrol"  distant  con- 
trol unit,  and  other  specials.  Copies 
come  from  the  Clarion  Institute  at  69 
Wooster  St.,  New  York,  N.  Y. 

An  engineering  bulletin,  Form  R-18, 
on  Magnavox  Molanode  capacitors  will 
be  sent  to  readers  who  address  the 
Magnavox  Co.,  Ft.  Wayne,  Ind.  Ease 
of  assembly  to  the  chassis  is  empha- 
sized. 

Burton-Rogers  Co.,  755  Boylston  St., 
Boston,  Mass.,  have  released  a  new 
leaflet  on  "Tops-AU"  aerials,  illustrat- 
ing and  describing  four  types  of  auto 
antennas,  along  with  accessories. 

General  Transformer  Corp.,  1250  W. 
Van  Buren  St.,  Chicago,  111.,  present 
two  new  booklets:  (1)  a  sale  of  Sales 
catalog  on  transformers  giving  speci- 
cations  on  all  superseded  numbers,  of- 
fered at  a  bigger  scale  of  discounts, 
and  (2)  1938  catalog  for  amateurs  and 
sound  engineers  showing  the  Progres- 
sive III  transmitter  nucleus  for  all 
bands,  a  5-10-20  meter  streamliner,  and 
a  complete  set  of  Multi-tap  units. 


40 


Radio  Today 


RADIO  TUBES 

and 

COD  LIVER  OIL 


I  he  radio  service  man  who  finds  drug 
stores,  stationery  stores  and  a  dozen 
others  featuring  tubes  might  try  selling 
some  of  their  lines — but,  we  wouldn  t  ad- 
vise it.  We  doubt  if  he  d  make  any  more 
money  on  cod  liver  oil  than  they  do  on 
cut-price  radio  tubes. 

Here's  a  better  suggestion.  Sell  the 
tube  that  protects  the  dealer  with  a  sound 
merchandising  plan.  The  tube  proposi- 
tion that  guarantees  full  profit  on  every 
sale — without  investment.  Under  the 
Tung-Sol  Consignment  Plan  reputable 
dealers,  who  can  qualify,  receive  a  stock 
of  dependable  tubes  without  paying  a 
cent  — they  sell  the  tubes,  collect  the 
profits  and  then  remit  once  a  month. 

Think  of  the  benefits  this  practical 
plan  holds^freedom  from  losses  through 
price  reductions  and  obsolescence  —  no 
price-cutting  competition  —  and  what  is 
more,  you  pay  no  premium  for  the 
financing  of  your  tube  stock. 

Write  our  nearest  sales  office  for  de- 
tails and  necessary  qualifications. 

Dept.  C.  ■ 


ii\l 


0»tt*s> 


RCA  Victor 

TIME-SAVING,  PROFIT-PACKED 
PMfike  SYSTEMS! 


Two  types  are  available — a  wireless  system 
for  instant  2-way  inter-office  communication... 
a  wired  system  for  1  to  5  channel  communication!  Both 
sell  at  reasonable  cost — assure  you  worth-while  profits. 


Designed  to  meet  the  time- 
saving  requirements  of 
modern  business,  these 
RCA  Victor  phones  will  ap- 
peal to  a  tremendous  mar- 
ket— a  market  you  can  sell. 
Practically  everyplace  of 
business  is aprospect.  Auto 
dealers,  banks,  dentists, 
doctors,   factories,   hospi- 


FOR  2-WAY  COMMUNI- 
CATION REQUIRE- 
MENTS RCA  VICTOR 
WIRELESS  PHONE-JUST 
PLUG  IN  — AND  TALK 


Model  MI-63  5  0  illustrated 
above,  is  as  simple  as  it  is 
effective.  Your  customer 
simply  plugs  into  the  light 
socket  (HOvoltACorDC) 
presses  a  button,  and  talks. 
No  wires,  no  batteries,  no 
installation  at  all.  Works 
perfectly  at  all  times. 

In  addition  to  the  wireless 
system  illustrated,  RCA 
Victor  also  offers  a  master 
phone  system  for  1,  2,  3,4 
and  5  channel  communica- 
tion, which  will  be  particu- 
larly popular  in  business 
offices.  Speech  is  clearly 
heard  up  to  25  feet  from  the 
loudspeaker.  Further  infor- 
mation from  distributor. 


tals, police  stations,  schools, 
and  dozens  of  others! 

Not  only  do  these  two 
RCA  systems  offer  many  ex- 
cellent sales  features,  but 
both  are  moderately  priced. 
Order  your  supply  now — 
and  climb  aboard  this  plus- 
profit  wagon! 


RCA  PG-1 12  PORTABLE 
P.  A.  SYSTEM 

. .  .  another 
money-making  item! 

Illustrated  above,  this  sys- 
tem is  universally  adapt- 
able. Operates  from  110 
AC  or  6-volt  storage  bat- 
tery and  dynamotor.  Per- 
manent or  mobile  installa- 
tion, 12  watts  output.  Two 
powerful  dynamic  speak- 
ers with  RCA  Velocity 
Microphone.  This  highly 
efficient  system  is  excellent 
for  scores  of  locations 
where  good  sound  is  para- 
mount. Besides  its  many 
selling  features,  the  PG-1 1 2 
is  low  in  price  —  only 
$199.50. 

Have  you  secured  your 
copy  of  RCA's  new  sound 
catalog?  If  not,  be  sure  to 
get  it  from  your  distributor, 
or  write  direct  to  us  in 
Camden,  N.  J. 

RCA  presents  the  Magic  Key  every 

Sunday,  2  to  3  P.  M.,  E.  D.  S.  T., 

on  the  NBC  Blue  Network 


Any  sound  system  sounds  better  equipped  with 
RCA  Radio  Tubes 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
A  Service  of  the  Radio  Corporation  of  America 


May,  1938 


41 


I 


II 


Servicemen! 

HERE'S  WHAT  THE  R.S.A. 
WILL  DO  FOR  YOU! 

Give  YOU  a  monthly  Advanced  Extension  Course  on 
the  current  developments  in  radio  servicing.  THIS  INFOR- 
MATION IS  AVAILABLE   ONLY  TO   RSA   MEMBERS! 

Give  YOU  monthly  Advertising  and  Business  Promo- 
tion ideas  to  increase  your  business  and  make  it  more 
profitable. 

Include  YOU  as  a  "REGISTERED  AND  QUALIFIED 
SERVICEMAN"  in  the  big  advertising  and  publicity  cam- 
paign going  on  in  newspapers  and  being  broadcast  over 
the  air! 

Give  YOU  a  subscription  to  "The  Radio  Serviceman" — 
the  Association's  monthly  magazine. 

Give  YOU  a  Certificate  of  Merit  to  hang  in  your  shop. 

Give  YOU  a  pocket  card  of  credentials. 

Give  YOU  our  big  expert  technical  staff  as  a  depart- 
ment in  your  service  business.  We  will  give  you  the  right 
answer  to  your  "impossible"  service  problems. 

Give  YOU  (if  you  belong  to  a  local  servicemen's  club) 
access  to  our  National  Speakers'  Bureau — famous  speak- 
ers for  your  meetings. 

Give  YOU  advance  technical  information  on  new 
circuits. 

$75  Worth  of  Material  and  Service  Free 

The  RSA  is  an  independent  organization,  owned  and  operated — 
not  for  profit — by  its  members.  It  has  the  backing  of  the  entire 
Radio  Industry  in  its  aim  to  make  servicing  a  real  business,  with 
regular   hours,   and   with   a    real   profit   at   the    end    of   each    week! 

The  RSA  is  already  the  largest  and  most  powerful  group  the  ser- 
vice business  has  ever  seen.  JOIN  NOW  and  get  in  on  all  its  benefits! 

RADIO  SERVICEMEN  OF  AMERICA 

JOE  MARTY,  JR.,  Executive  Secretary,  304  S.  Dearborn  St.,  Chicago 

MAIL    THIS    COUPON  • 

RADIO  SERVICEMEN  OF  AMERICA,  INC. 
304  South  Dearborn  St.,  Chicago,  111. 

Gentlemen: 

I  hereby  make  application  for  membership  in  the  Radio  Service- 
men of  America. 

Name    

Home  Address 

City State 

Firm   Name    

Address     

.  .  ./  am  enclosing  $2.00  National  Yearly  Dues. 
.  .  .  Bill  me  $2.00  National  Yearly  Dues. 


SALES  AID 


DISPLAY  BOARD  FREE 


I          Tc  Toot  Bfldio 

Added  to  the  complete  kit  of  sales 
helps  available  to  dealers  handling 
Ward  auto  aerials  is  a  new  wall  hanger 
point-of-sale  display  unit  just  released 
by  Ward  Products  Corp.,  Cleveland, 
Ohio.  Lithographed  in  orange  and 
blue,  the  display  includes  a  set  of 
price  stickers  so  that  any  of  11  differ- 
ent models  of  aerials  may  be  featured. 


TUBE  BUSINESS-GETTER 

Giant  canvas  banner,  with  large  let- 
ters saying  "Radio  Service  by  Radio 
Technicians"  is  now  available  to  Tung- 
Sol  dealers.  Complete  with  hanging 
gadgets,  the  banner  is  3  x  6  feet,  in 
black,  white,  yellow,  red  and  blue. 


PILOT  LIGHT  MERCHANDISER 

Flasher  display  board  for  pilot  light 
assemblies  is  being  offered  free  to 
jobbers  by  the  Dial  Light  Co.,  136 
Liberty  St.,  New  York.  The  sparkling 
and  colorful  nature  of  the  jewel  in 
the  assemblies  is  used  to  make  the 
flasher  effect  an  eye-catcher.  The 
finish  is  black  crackle  with  yellow  let- 
tering. Jobbers  are  required  to  pay 
for  only  the  8  or  10  light  sets  on  the 
board  itself. 


IRON  DISPLAY 


■k  A  window  and  counter  display, 
in  colors,  is  now  available  free  to 
dealers,  from  The  Steem  Electric  Iron, 
Inc.,  11  W.  42nd  St.,  New  York,  N.  Y. 
The  main  piece  dramatizes  the  "Evo- 
lution of  Ironing"  from  'way  back,  il- 
lustrates the  Steem  Electric  product 
in  use,  and  carries  a  catchy  outline  of 
sales  points.  Smaller,  single  display 
placards  are  also  available. 

"The  1938  Mastercraft  Line  of  Qual- 
ity Pads"  is  the  title  of  a  booklet  re- 
leased by  Bearse  Mfg.  Co.,  3815  Cort- 
land St.,  Chicago.  It  describes  pads 
and  carrying  harness  for  radios,  phono- 
graphs, refrigerators,  washers,  etc. 


42 


Radio  Today 


YOU  NEED 
THEM  BOTH 


IheorV 


LIKE  TWIN  KEYS  — both  of  which 
are  required  to  open  the  safe  deposit 
vault— THEORY  and  PRACTICE  are 
both  necessary  if  you  are  to  get  the 
most   from   your   efforts. 

Whether  you  are  a  serviceman 
whose  profits  depend  upon  the  speed 
of  your  work — or  an  amateur  whose 
pleasure  depends  upon  the  perform- 
ance of  your  instruments — you  know 
the  value  of  a  thorough  grounding  in 
theory  and  the  Importance  of  having 
factual  Information  constantly  at  your 
fingertips.  Know  "how"  and  "why" 
a  set  performs.  Order  the  Rider  Books 
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MANUALS 


RSA  GAINS  MEMBERSHIP 

Despite  the  current  general  business 
recession,  the  RSA  continues  to  show 
substantial  membership  gains.  Local 
groups  in  Buffalo,  N.  Y.;  Houston, 
Tex.;  Jamestown,  N.  Y.,  and  Rockford, 
111.,  have  affiliated  with  the  RSA  in  the 
last  thirty  days.  Thirty-one  local  as- 
sociations have  affiliated  with  the  RSA 
to  date. 

The  RSA  is  embarking  upon  the  first 
step  of  its  program  to  acquaint  the 
public  with  the  desirability  of  having 
good  radio  servicing  by  sponsoring  a 
Better  Radio  Reception  Week.  This 
program  is  being  run  in  cooperation 
with  local  broadcasting  stations  in  Chi- 
cago and  the  Chicago  Chapter  of  RSA. 
Accurate  tabulations  are  being  kept  of 
results  and  some  very  interesting  facts 
will  be  released  to  the  trade  shortly. 

Chicago — The  Chicago  Chapter  had  \~> 
the  pleasure  of  hearing  John  F.  Rider 
at  which  time  Mr.  Rider  took  the  boys 
to  task  for  their  lack  of  business  abil- 
ity as  well  as  their  failure  to  take  ad-  j.Ijij  ; _;.  ;;■    L           ^aC 
vantage  of  many  aids  offered  by  the  in- 
dustry, in  order  that  they  might  im- 
prove their  business.     He  stressed  the  •'^^■■■f" 
fact    that    regardless    how    good    they  i,iil 

were  technically,  it  is  necessary  to  be  inf    IiumJ'toiJ* 

business  men  in  order  that  they  may  *    '    *    U         nuna.zea.3 

succeed  in  the  radio  servicing  business.  OF       R  F  S  I  ^  T  0  R 

Houston — The  National  Radio  Ser-  v;<ij     -.  _  _  .    ■  A  r  ■•  r  u  T  n 

vice    Association     of    Houston,     Tex.,  REPLACEMENTS 
voted   to  affiliate   with   RSA  and   join 

with  other  groups  of  servicemen  ,  .  ,  up  to  /O  Ivntti 
throughout  the  country  who  are  de-  • 
termined  to  improve  both  the  business  §3  ...  No  need  to  keep  com- 
and  technical  efficiency  of  radio  ser-  plete  stocks  of  fyi«  V3.  '/2>  1«  2 
vicing.  Mr.  T.  F.  Stephenson,  a  mem-  or  3  watt  resistors!  No  lost 
ber  of  the  organizing  board  of  RSA,  is  time  or  lost  motion!  Just 
a  member  of  this  group.  The  group  is  carry  a  few  IRC  10-watt  fixed 
under  the  direction  of  C.  L.  Robertson,  and  adjustable  Cement 
Chairman;  and  J.  L.  Stone,  Secretary-  rSJ  Coated  Power  Wire  Wounds 
Treasurer.  ,""  i  and  you'll  be  prepared  for 
Rockford— The  Rockford,  111.,  M  hundreds  of  replacements- 
Chapter  RSA  was  officially  established  fc  almost  anything  up  o  10 
on  Thursday,  April  7  at  which  time  all  yatts-  *  smHa"  st,oc,k,  of  IR,C 
of  the  radio  service  dealers  in  town  TY*>e  ABA  Adjustable  units 
voted  unanimously  to  form  the  Rock-  f?ves.  *ou  dof,ens  °,f.raf a"- 
ford  Chapter  of  RSA.  This  is  one  of  M  S,imply  ■•'  the  ad,"s  abl? 
the  strongest  groups  yet  to  affiliate  sbde.r  °n  *he  e*P0Sed  tr.ai* 
with  RSA.  Officers  elected  were:  Mr.  §§  of  wire  to  tap  off  any  desired 
Frank  N.  AVelden,  Chairman;  Mr.  E.  S.  resistance  value  up  to  the 
Ary,  Secretary;  and  Mr.  A.  L.  Hissong,  maximum  range  of  the  unit. 
Treasurer  *         Additional  taps  can  be  used 

to  make  one  resistor  do  the 

Buffalo — The    Associated    Radio  work  of  two  or  more. 

Service    Engineers    of   Buffalo,    N.   Y.,  9 

one  of  the  oldest  and  most  progressive  g     FREE  !  Write  lor  the  new  IRC 

groups   of   servicemen   in   the   country,  Resistor  and  Volume  Control 

voted    on    April    5,    1938.    to    become    af-  S3       Catalog  listing  the  complete  IRC 

filiated  with  the  RSA.    This  fine  group  Iine  ,or  radio  service,  amateur, 

of     servicemen     have     done     much     to  :         engineering  and  "lob    work. 

raise   the   standards   of   servicing  and  jjj  j        "  ~fLa 
servicemen  in  the  Buffalo  area,  and  is  I ney 

under  the  able  leadership  of  Anthony  fen      fj  VJ      ' 

Schreiber,  Chairman;  Vincent  E.  Ball,  ±t<LU  rut 

Treasurer;    and  Frank  Bestine,   Secre-  \\  \Q}' 

tary. 

Jamestown — The  Jamestown 
(N.  Y.)  Association  of  Radio  Service 
Engineers,  who  attended  a  meeting 
held  in  Buffalo  on  April  5,  voted  to  af- 
filiate with  RSA.  This  able  group  of 
men  is  under  the  leadership  of  Law- 
rence Babcock,  Chairman;  Richard  L. 
Bonsteel,  Treasurer,  and  C.  Leonard 
Johnson,  Secretary. 

Johnstown — The  Johnstown  Chap- 
ter RSA  is  devoting  quite  a  bit  of  time 
to  its  current  meetings  for  the  discus- 
sion of  noise  interference  elimination. 
(To  next  page) 


3fcf 


INTERNATIONAL 
RESISTANCE  COMPANY 

401  N.  Broad  St..  Philadelphia.  Pa. 


May,  1938 


43 


\I>JUSTABLE  Rtfmtt* 


made  noiit 


THE  ACOUSTIC 
COMPENSATOR 


*Higheror 
lower  pitch 
with  the 
same  micro-  ■ 
phone. 


With  the  ilip  of  a  finger  you  can  now  (V  Jower 
or  raise  the  response  of  the  microphone.  .  .  (2) 
adjust  the  microphone  for  most  desirable  re- 
sponse for  close  talking  or  distant  pickup.  .  . 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment. 

MODELS  RBHk,  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  11000  cps,  output, 
-65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable $42.00  LIST 


NEW  LOW-PRICED  CONTACT  "MIKE' 


$12.00  LIST 


The  new  popular-priced  Amperite  Contact  Mi- 
crophone can  be  used  on  most  radio  sets  made 
since  1935  and  on  all  P.A.  systems.  It  "makes 
an  ordinary  violin  sound  like  a  Strad"  . . .  gives 
a  small  piano  the  tone  of  a  Grand.  And  yet, 
there  is  no  distortion.  No  unnatural  effects.  No 
"fingering  noises."  No  changes  in  strings  or 
instrument.  Attached  without  tools. 
Operates  with  either  high  or  low  gain  ampli- 
fiers. Has  frequency  response  of  40  to  9000  cps. 
Output.  -40  db.  20'  of  cable. 
MODEL  SKH  (Hi-imp);  SKL  (200  ohms), 

$12.00  LIST 
Professional  Model  KTH  (or  KTL) .  .  $22.00  LIST 


NEW  COMPACT  "MIKE" 


A  new  velocity  microphone  of  com- 
pact size,  having  a  head  only  1  '-V'x 
23/b"x13/b."  Good  for  speech  and 
music.  May  be  used  as  hand  mike  as 
well  as  tor  stand  mounting.  Complete 
with  output  transformer,  cable  con- 
nector and  switch.  Output,  -70  db. 
into  open  line.  Frequency  response 
60  to  7500  cycles. 
MODEL  ACH  (Hi-imp.);  ACL 

(200  ohms) $25.00  LIST 


MODEL  RAH...S22.00  LIST 


P.A.  Men,  you  can  improve  those 
"price"  jobs  by  using  the  popular 
Amperite  Model  RAH  (or  RAD. 
You  will  get  better  results  be- 
cause (1)  it  is  excellent  for  both 
speech  and  music;  (2)  has  flat  re- 
sponse without  undesirable 
peaks;  (3)  reduces  feedback;  (4) 
stands  up  under  rough  handling 
and  changes  in  temperature, 
pressure  or  humidity.  .  .  .  Fre- 
quency range  60  to  7500  cps.  Out- 
put, -68  db. 
MODEL  RAH  (Hi-imp);  with 

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ohms)  with  8'  of  cable, 

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Write  tor  Complete  Illustrated  Bulletins  and 
Valuable  Sales  Helps. 

AKAacolTC  d      561  BROADWAY,  N.  Y. 


WPEWE^fy 


RSA  GAINS  MEMBERSHIP 

A  thorough  check  is  being  made 
throughout  the  Johnstown  area  to  de- 
termine the  offenders  in  this  respect, 
and  prompt  and  vigorous  action  has 
been  promised  in  order  that  radio  re- 
ception may  be  aided  thereby.  Mr.  K. 
A.  Vaughan,  the  newly  elected  director 
of  the  RSA  is  a  member  of  the  Johns- 
town Chapter  and  is  aiding  in  this 
work. 

Metropolitan,  N.  Y.,  Chapter  RSA 

— The  Metropolitan,  N.  Y.  Chapter 
devoted  its  last  meeting  time  to  hear- 
ing Mr.  A.  E.  Rhine  speak  on  "Costs 
Relative  to  the  Service  Business."  Very 
accurate  data  was  presented  and  will 
be  used  in  the  house  organ  in  the  near 
future  for  the  information  of  all  mem- 
bers of  RSA. 

Abilene — The  Abilene  Chapter 
RSA  devoted  their  last  meeting  to  a 
discussion  of  Business  Methods  and 
Business  Ideas.  The  consensus  of 
opinion  was  that  a  great  deal  of  busi- 
ness was  lost  in  not  using  salesman- 
ship to  sell  their  services.  The  Abilene 
Chapter  is  taking  steps  to  remedy 
these  defects  in  the  Chapter.  This 
work  is  under  the  supervision  of  C.  L. 
Gentry,  Secretary. 

Rio     Grande     Valley — T  he     Rio 

Grande  Valley  Radio  Servicemen's  As- 
sociation holds  regular  meetings  the 
first  and  third  Wednesdays  of  each 
month.  The  program  consists  of  tech- 
nical talks  and  discussions  by  the 
members  with  speakers  from  manu- 
facturers whenever  possible.  At  pres- 
ent they  are  working  toward  a  study 
course  for  their  members. 


STOCK  SMALL  RADIOS  NOW 

With  average  customer  purchasing 
power  shrunk  as  it  is  today,  the  radio 
dealer  (who  is  the  backbone  of  radio) 
will  be  making  a  mistake  if  he  fails 
to  stock  small  radios,  declares  Ben 
Abrams,  Emerson  president.  If  the 
radio  dealer  has  not  a  sufficient  stock 
of  small  radios,  he  will  have  to  stand 
by   and   see   customers   drift  away   to 


department  stores  and  other  non-radio 
outlets  for  their  small  sets.  The  pres- 
ent is  a  time  of  buying  on  price,  and 
the  wise  retailer  is  the  one  who  recog- 
nizes this  trend  of  the  moment  and 
will  go  along  with  it,  rather  than  fight 
against  the  inexorable  economic  fac- 
tors that  are  in  control  for  the  time 
being. 

PARTS  JOBBERS'  PRESIDENT 
STATES  CREDIT  TERMS 

*  "The  present  trend  of  radio  deal- 
ers and  service  men  is  towards  slow- 
ness, with  many  extending  into  periods 
of  90  days  and  more,"  comments  Leslie 
C.  Rucker,  president,  National  Radio 
Parts  Distributors  Association.  "Ap- 
parently one  of  the  general  trends  of 
the  parts  jobbing  business  is  towards 
being  banker  for  the  average  dealer 
one  sells  to,  as  well  as  being  'father 
confessor.' 

"Through  our  local  chapter  of  the 
National  Association,  we  are  setting  up 
very  definite  credit  terms  which  will 
shortly  be  completed.  The  purpose  of 
this  arrangement  will  be  to  keep  ser- 
vice men  and  dealers  from  playing  one 
distributor  against  another.  We  feel 
very  definitely  that  a  business  as  large 
as  radio  and  as  unclean  as  radio  has 
become,  is  in  need  of  all  the  cleaning 
up  and  adjusting  of  policies  possible. 
Our  purpose  is  not  to  limit  or  exclude, 
but  to  definitely  let  the  service  man 
understand  that  a  credit  bureau  is  set 
up  and  that  unless  he  abides  by  the 
code  of  ethics  adopted  by  all  of  the 
distributors,  he  cannot  run  up  a  bill 
from  one  distributor  and  buy  from  the 
second  to  pay  the  first,  and  so  on,  as 
far  as  he  is  permitted  to  go. 

"We  feel  that  this  will  give  the  re- 
liable dealer  and  service  man  encour- 
agement to  invest  his  money  in  his 
business  and  to  pay  his  bills  on  the 
10th  of  each  month.  We  feel  that  such 
an  operation  as  this  can  only  be  han- 
dled through  a  local  credit  association 
and  on  this  subject,  we  highly  recom- 
mend that  all  distributors  team  up 
with  their  local  credit  bureau  for  their 
own  protection." 


MICROPHONE 


Crisp  $100  bill  goes  from  Emerson  president  Ben  Abrams,  right,  to 

Louis  Sobel,  Sobel  Electric  Co.,  Brooklyn,  N.  Y.,  whose  salesman  was 

that  lucky  in  a  recent  prize  drawing  at  a  big  dinner  staged  by  Emerson 

in  New  York 


44 


Radio  Today 


^y 


IB 


m 


\ 


i#rfsMlIEE 


Hotel  Stevens,  Chicago,  location  of  National  Trade   Show,  June  8-11 


RADIO 
TODAY 


SHOW  and  ANNOUNCEMENT  NUMBER 

JUNE  1938  ISSUE 

SHOW  For  distribution  ISSUED 

EDITION  at  the  show  JUNE  8 

Final  closing  date,  June  1 

FINAL  Including  all  contents  ISSUED 

EDITION  of  Show  Edition  JUNE  1 5 

Final  closing  date,  June  8 


23,000  GUARANTEED 


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•  Radio  Servicemen  the 
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to  depend  upon  Consoli- 
dated products  for  all 
their  replacements.  Their 
confidence  has  been 
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quality — an  ever  constant 
policy  of  giving  more  for 
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rnljJj!    USE   COUFON 

•  Halhlorson  engineers  have  just  com- 
pleted this  study.  Saves  time  and  effort 
to  servicemen.  Shows  the  correct  Hall- 
dorson  model  to  use.  Relatively  few 
models  take  care  of  practically  all  sets: 
in  fact,  catalog  shows  8  models  will  han- 
dle over  90%  of  replacement  demands 
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DISTRIBUTORS 


E-.L.  CHAMBERS 
CINCINNATI 


Sketches    of    prominent    jobbers    pre- 
sented this  month  are  the  work  of  Lew 
Merrell   and   anoear   throueh   courtesy 
of  National   Union   Radio  Corp. 


Gross  Rales.  Inc.,  New  York  and 
New  England  representative  for 
Stroviberg-Carlson.  have  named  M. 
Drxooon.  their  sales  representative  for 
their  Long  Island.  N.  Y..  area.  Drib- 
bon  is  a  seasoned  expert  in  radio 
retail  and  wholesale  work:  now,  he 
will  contact  dealers  in  Queens.  Nassau 
and  Suffolk  counties.  President  Ben- 
jamin Gross  of  Gross  Sales  points  out 
that  Dribbon  will  be  able  to  give  spe- 
cial service  to  dealers'  retail  problems. 

Atlas  Sound  Corp..  Brooklyn  N.  Y., 
now  maintains  warehouse  stocks  in 
key  cities  such  as  Cleveland.  Chicago. 
Seattle  and  San  Francisco,  to  speed 
up  Jhe  delivery  of  sound  equipment. 
Atlfrs  sales  director  R.  C.  Reinhardt 
states  that  the  company  makes  a  point 
of  being  prepared  for  immediate  and 
economical   delivery   to   distributors. 


Sales  manager  James  J.  Davin  of 
Detrola  Corp.,  has  announced  the  ap- 
pointment of  Hall-Young  Co..  2018 
Commerce  St.,  Dallas,  Tex.,  as  dis- 
tributors for  Detrola  products.  Lively 
promotions  on  the  Pee  Wee  and  the 
Super  Pee  Wee  are  under  way  in 
Dallas  and  new  dealers  are  interested. 

Electro  Sound  Products,  Inc.,  dis- 
tributors, have  opened  offices  and  dis- 
play rooms  at  620  N.  Michigan  Ave., 
Chicago.  Vice-president  V.  G.  Geisel 
will  be  manager.  Recording  equip- 
ment made  by  Radiotone,  Inc..  Holly- 
wood, will  be  sold  at  the  start;  other 
sound  lines  will  be  added. 

Harry  A.  Lasure,  pioneer  manufac- 
turers' agent  of  Los  Angeles,  Calif., 
will  leave  for  his  annual  trip  East 
about  June  1.  During  the  Parts  Show 
he  will  be  at  the  Stevens  Hotel,  Chi- 
cago. 


Bill  Hitt.  Los  Angeles,  who  is  the 
West  Coast  representative  for  Aerovox 
Corp.,  is  beginning  the  fifteenth  year 
of   his   connection   with   Aerovox. 


JIM 
QUAM 


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33rd  Place  6  Cottage  Grove 
CHICAGO 


1674  Broadway 
NEW  YORK 


ELL 
CROWE 


INTERCHANGEABLE 

NEARLY  four  million  auto  radio  sets,  new 
within  the  last  three  years,  offer  you  an  un- 
usual opportunity.  Sell  Crowe  On-the-Panel 
Controls  to  reinstall  these  still-serviceable 
radios  in  new  cars.  Sell  them  to  replace  old- 
fashioned  under-dash  or  steering  column  con- 
trols in  owners'  present  cars. 

All  Cars  .  .  .  Most  Radios 

Crowe  Controls  are  interchangeable  for  all 
cars  and  most  makes  of  radios.  Airplane  or 
porthole  dials  make  it  easy  to  exactly  match 
manufacturer's  car  styling.  Easy  to  install. 
Economical  to  stock.  Standard  equipment  on 
leading  makes  of  radios. 

See  Your  Jobber 

Go  after  your  share  of  this  re- 
placement business.  Get  a  stock 
of  Crowe  Controls  from  your 
Jobber. 


CROWE  NAME  PLATE  &  MFG.  CO. 

1745  GRACE  STREET     CHICAGO 

CABLE  ADDRESS:     CRONAME     CHICAGO 


46 


Radio  Today 


Olsen  Radio  Supply,  parts  jobbers 
of  412  Pereida  St.,  San  Antonio,  Tex., 
have  issued  a  big  new  catalog,  a  1938 
buying  guide  with  list  prices.  It  may 
be  used  as.  a  selling  medium  without 
dislosing  trade  prices. 

Sun  Radio  Co..  veteran  parts  jobbers 
of  New  York  City,  have  moved  to 
their  own  new  2-story  building  at  212 
Fulton  St.  Special  departments  are 
provided  for  amateur  supplies,  PA, 
test  equipment,  besides  a  huge  set 
department  and  a  section  for  appli- 
ances. Modern  soundproof  booths  are 
featured,  and  a  phonograph-and-rec- 
ord  department  has  been  added. 

Arcturiis  distributors  throughout 
the  country  recently  received  pieces 
of  an  enormous  birthday  cake  which 
had  been  a  feature  of  company's 
celebration  of  its  10th  anniversary 
of  its  development  of  the  quick-heat- 
ing radio  tubes.  The  cake  was  6  ft. 
square,  lighted  with  10  quick-heating 
blue  tubes  of  a  decade  ago.  Arcturus 
sales  manager  Jack  Geartner  figured 
up  that  the  firm,  with  the  quick-heat- 
ing feature,  saves  approximately  84 
years  of  radio  listening  time  each  and 
every  day. 

J.  M.  McNamara  has  been  named 
Detrola  divisional  manager  for  an 
area  bounded  by  a  line  running  from 
Buffalo  to  Pittsburgh  to  Albany  and 
from  Bridgeport  to  Bangor,  Me.,  and 
to  Burlington.  Vt. 


EARL 
MA  8**4, 
MILWAUKEE, 


"TOKFONE"— The  1938  Sensation! 


PEP  •  PUNCH  •  PRICE 


u 


T0KF0NE 


v 


TOKFONE,  Jr. 
Master  Station 


JUNIOR 

Consisting  of  Master, 
Remote    Station    and 
50  ft.  of  wire. 
• 
The  Biggest  Buy  in 
Communication  Systems 

NOTHING    CAN    TOUCH    IT! 

GET  YOUR  SHARE! 

.  .  CRASH  THIS  FERTILE  MARKET! 


If  you're  in  a  position  to  "CASH-IN"  with  FAST  MOVING- 
LOW  PRICED  intercommunication  systems  then  you  owe  it 
to  yourself  to  get  in  touch  with  REGAL — NOW! 

•  Note   These   Facts    • 

OTHER  TOKFONE  SYSTEMS— adaptable  to  meet  all  requirements— from  2  to  40  stations— beautifully 
hand-rubbed  cabinets— NO  PREFERENCES— NO  TRICKS— No  Makeshifts— All  New  Merchandise— Special 
Units   if   Necessary — Manufactured   in  our  own  factory. 

We  also  Manufacture  P. A.  Equipment  in  the  following  sizes:  6.  12,  15.  30,  60  Watt — Amplifiers — Parts 
used    are:    Aerovox-Thordarson — I.R.C. — Pannet-Rola — Clarostat-Eby    and    Holyoke — Nothing    but    the    best. 

SEND   FOR   CATALOG   SHOWING    COMPLETE   LINE! 
REGAL    AMPLIFIER   MANUFACTURING   CORP. 

14  WEST  17th  STREET  C.?*>1<  a*dre"  NEW  YORK  CITY 


Get  this  combination 

VOLT-OHM  -MILLIAMMETER 

AND  FREE  POINT  TESTER 

Precision    built    throughout,    yet    designed    to    withstand    rough 
field    work.     That's   why   you   find    Readrite-Raiiger   testers    used 
by    so    many    leading    service    organizations.    Volt-Ohm- MUlTam- 
meters.   Tube   Testers,    Free   Point   Test- 
ers,   Oscillators,    available    in    combina- 
tions or  in  single  units.    No  extra  cases 
to  buy.     Today"s   biggest   values   in   Pre- 
cision  Testers. 

The  Readrite-Ranyer  Model  640  Free 
Point  Tester  has  eight  automatic  switch 
type  and  ten  single  action  jacks.  Five 
sockets  will  handle  any  type  radio  re- 
ceiving tube.  Model  740  Volt-Ohm- 
Milliammeter  has  3"  Square  Triplett 
Precision  Instrument.  Scale  readings: 
10-50-250-500-1000  AC  and  DC  Volts 
at  1000  Ohms  per  Volt  (DC  Accuracy 
2%;  AC  5%);  1-10-50-250  DC  M.A.. 
0-300  Low  Ohms;  High  Ohms  to  250,- 
000  at  V/2  Volts.  {Rheostat  adjust- 
ment for  13''2  Volts  for  Ohms  readings 
to  2'/2  Megdhms.  Batteries  may  be 
added,  permitting  such  readings  in  250.- 
000  Ohms  steps.)  Low  Ohms  to  '/a 
Ohm  with  25  Ohms  in  center  of  scale. 
Backup  circuit  used.  Current  draw  is 
only  1  M.A.  Batteries,  accessories  aid 
instructions  included. 
ALSO    AVAILABLE    IN    SINGLE    UNITS 


•    COMPLETE    SHOWING    • 

7938-7939  METERS  &  TESTERS 

Booth   275 — Steinmeiz  Ave. 

JUNE   PARTS    SHOW— CHICAGO 


.     .     .      NO 

EXTRA   CASES   TO 

BUY 

Mode 

1  640-740 

READRH 
i        519   Colli 
•           Please 
!       O  I    am 

E    METER    WORKS 
ge   Avenue.   Bluffton. 
send  me  more  illfon 
also   interested   in 

Ohio 
tation 

on 

□ 

Model  MO 

-T40:      | 

J        \ddress    - 

City 

May,  1938 


47 


Ask  Your  Jobber 

for  the 

NEW  CENTRALAB 

Volume  Control  Guide 


Jin   .   .    .    the   service- 
men's most  popular  guide 
.  .  .  now  available  .  .  .  big- 
ger and  better   than  ever. 

Lists  10,000  models!  .  . 
240  pages  .  .  .  more  than 
400  types  of  radios  .  .  . 
complete  line  of  midget 
Radiohm  Replacements  . .  . 
Also  a  complete  listing  of 
all  other  Centralab  prod- 
ucts: switches,  resistors, 
sound  projection  controls, 
and  the  new  Centralab 
wire-wound  Radiohm. 


FREE:   At  your  jobber  .  .  .  or 

send  10c.  to  cover  handling  and 

mailing  to  Centralab 


J' 


V 


Meet    Centralab    at    the 

National  Radio  Parts 

Trade  Show 

Chicago      -      June  8-11 

^ r 


Oentsalab 


Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 


TALK  OF  THE  TRADE 


Allen  B.  DuMont  Lais.,  Inc..  are 
now  established  in  their  own  factory 
building  at  2  Main  Ave.,  Passaic,  N.  J. 
New  quarters  have  space  for  future 
plant  expansion  and  having  spent  sev- 
eral months  on  improvements  at  the 
site,  DuMont  Labs  now  have  much 
needed  space  for  their  growing  pro- 
duction of  cathode-ray  tubes,  oscillo- 
graphs and  associated  equipment,  as 
well  as  for  laboratories  and  general 
offices. 

Vice-president  M.  H.  Kranzberg  of 
Wholesale  Radio  Service  Co.,  Inc.,  has 
announced  the  appointment  of  Wil- 
liam Tiger  as  manager  of  the  firm's 
new  camera  division.  Mr.  Tiger  has 
had  wide  experience  with  department 
stores,  camera  clubs  and  photo  maga- 
zines. 

Gere  Burns,  pioneer  radio  sales  and 
advertising  executive,  is  now  director 
of  sales  and  advertising  for  the  Life- 
time Corp.,  sound  equipment  manu- 
facturers of  Toledo,  Ohio.  Mr.  Burns 
has  acquired  an  ownership  interest 
in  Lifetime  and  with  president  Wil- 
liam H.  Manoff,  has  planned  a  new 
schedule  of  promotion  and  sales. 

Floyd  W.  Bell,  president  of  Bell 
Sound  Systems,  Inc.,  61  E.  Goodale 
St.,  Columbus,  Ohio,  has  announced 
the  appointment  of  R.  E.  Potts  as 
sales  manager.  Bell  firm  manufac- 
tures a  complete  line  of  public  ad- 
dress, amplifying  and  inter-communi- 
cating equipment,  with  a  full  U.S. 
representation  operating  through  job- 
ber and  dealer  channels. 

Extra  large  order  of  custom  built 
dials  has  been  placed  by  S.  W.  Gross 
of  Emerson,  with  vice-president  Philip 
Richland  of  Gemloid,  Corp.,  makers  of 
decorative  processed  dials.  Brand  new 
designs  and  effects  will  be  used  by 
Emerson  in  the  1939  radio  line. 

Radio  Servicemen  of  America  re- 
cently held  an  open  meeting  at  the 
Radiart  factory,  Cleveland,  Ohio.  Fea- 
tured subjects  were  new  high-fre- 
quency vibrators,  and  engineering  de- 
sign of  auto  aerials. 


Crosley  Radio  Corp.  has  a  new  chief 
engineer  for  its  automotive  radio  divi- 
sion,  Clarence   G.   Felix.     His   connec- 


New  chief  engineer  for  Crosley 
auto  radio,  C.  G.  Felix. 


tion  with  Crosley  dates  back  to  1927 
and  during  that  period  he  has  held 
various  key  engineering  positions  with 
the  company,  with  notable  results. 

Utah  Radio  Products  Co.  recently 
held  an  annual  meeting  of  stock- 
holders, and  re-elected  eight  of  nine 
Board  Directors.  Robert  M.  Felsen- 
thai  was  elected  the  ninth  director. 
These  officers  were  re-elected:  G.  Ham- 
ilton Beasley,  president;  John  A.  Sny- 
der, first  vice-president;  E.  L.  Barrett, 
vice-president  in  charge  of  engineering 
research;  W.  Dumke,  vice-president  in 
charge  of  production;  and  H.  S.  Ney- 
man,  secretary-treasurer. 

H.  W.  Acton,  of  H.  W.  Acton,  Inc., 
who  market  the  Actone  "Shadow- 
graphed"  transcription  and  phono- 
graph needles,  reports  increased  ac- 
ceptance for  the  product  among 
broadcast  stations  of  the  country. 
"Shadowgraphing"  is  the  Actone  proc- 
ess by  which  a  greatly  enlarged 
shadow  of  each  needle  point  is  meas- 
ured and  checked  before  shipment. 


Janette  Rotary  Converters 

;   Are  Recommended-by  \ 

Philco  Radio  and  Television  Corporation 

who  is  one  of  the  many  internationally  known 
radio  manufacturers  recommending  Janette 
Rotary  Converters. 

TO  ALL  PHILCO  DISTRIBUTORS 

"We  have  had  a  lot  of  experience  with  rotary  converters  for 
use  with  radios  and  we  recommend  that  you  use  Janette 
rotary  converters  ....  PHILCO  models  will  give  entirely 
satisfactory  performance  with  the3e  converters".  .  .  . 

WHY  EXPERIMENT  — INSIST  ON  fl  JANETTE 


Janette  lttaiuifeduring  Gomparur 

556-558  "West  TYlonwre  Street  eKi&aqo,  III.  "U.  S.JI. 

BOSTON-  NEW  Y0RK-PHILA0ELPHIA  -  CLEVELAND-  MILWAUKEE  -LOS  ANSELES 


DETROIT-  SEATTLE 


48 


Radio  Today 


The  new  vice-president  in  charge 
of  engineering  for  the  radio  division 
of  Sonora  Radio  &  Television  Corp., 
Chicago,   is  Ben  Freund,  according  to 


Sonora  Radio's  new  engineering 
vice-pres.,  Ben  Freund. 


news  from  president  Joe  Gerl.  Mr. 
Freund  has  been  in  radio  since  1920; 
he  was  recently  with  Continental 
Radio  &  Television  Corp.  and  formerly 
worked  with  Columbia  Radio  Corp. 
and  with   Bremer-Tully   Co. 

After  21  years  at  the  same  address, 
the  jobber  firm  J.  H.  Burke  Co.,  Bos- 
ton, have  taken  bigger  and  better 
quarters  at  674  Commonwealth  Ave. 
Increased  activities  and  maintenance 
of  Burke  service  to  dealers  made  the 
move  necessary. 

Frank  Harris,  formerly  with  Emer- 
son, has  been  appointed  Detrola  ex- 
port manager.  His  assistant  is  Rhudy 
Blanck,  who  just  returned  from  a  long 
tour  of  Detrola  European  outlets. 

Presto  Recording  Corp.  reports  an 
increase  of  78  per  cent  in  sales  of 
sound  recording  equipment  for  the 
first  quarter  1938,  compared  with  the 
same  period  last  year.  Dealers  at  the 
rate  of  two  a  day  have  been  adding 
the  line,  and  report  it  a  sure-fire 
traffic  builder,  according  to  headquar- 
ters news.  Repeat  business  in  sales 
of  blank  discs  during  a  recent  month 
are  123  per  cent  over  the  same  month 
last  year. 


Radio  Doctors,  Inc.,  radio  dealers 
of  Urbana,  111.,  recently  staged  a  se- 
ries of  high  fidelity  demonstrations  at 
the  local  University  of  Illinois'  Elec- 
trical Show.  Tonal  tests  were  pre- 
sented at  five  shows  at  which  guests 
averaged  3,000.  Messrs.  Nolan  and 
Price  of  Stromberg-Carlson's  Chicago 
office  were  the  showmen,  while  the 
dealer  found  hundreds  of  new  pros- 
pects among  the   guests. 


President  R.  L.  Triplett  of  the  Trip- 
lett  Electrical  Instrument  Co.,  Bluff- 
ton,  Ohio,  returned  recently  to  his 
offices  from  a  2  months'  vacation  and 
business  trip  across  the  continent  to 
the  West  Coast.  He  returned  via  the 
Panama  Canal,  Cuba  and  New  York 
City. 


Weston  Electrical  Instrument  Corp. 
have  moved  their  New  York  office 
from  50  Church  St.  to  additional 
space  and  facilities  at  11  Park  Place. 
The  office  remains  under  the  manage- 
ment of  L.  C.  Nichols. 


National  Union  Radio  Corp.  have 
consolidated  their  sales  headquarters, 
formerly  located  at  570  Lexington 
Ave.,  New  York  City,  with  the  NU 
research  and  engineering  headquarters 
at  57  State  St.,  Newark,  N.  J.  Move 
was  made  in  the  interests  of  better 
and  faster  company  and  customer  re- 
lations. At  the  new  and  larger  New- 
ark offices  will  be  located  these  Na- 
tional Union  execs:  8.  W.  Muldowny. 
R.  H.  Tan  Dusen,  J.  H.  Rooinson,  G. 
E.  DeNike,  F.  M.  Paret,  J.  J.  Clime 
and  Le  Roy  Schenck.  Other  execs 
will  be  located  at  45  Spring  St.,  New- 
ark, among  which  are  H.  R.  Peters, 
president,  H.  G.  Butterfield,  Andrew 
A  Priest  and  R.  E.  Booth.  NU  also 
conducts  extensive  manufacturing  op- 
erations at  1181  McCarter  Highway, 
Newark. 


One  of  the  feature  sound  installa- 
tions of  the  month  has  been  made  by 
Wholesale  Radio  Service  Co.  with 
Lafayette  equipment  at  the  New  York 
Academy  of  Medicine.  In  handling 
the  job  for  this  famous  lecture  hall, 
Lafayette  engineers  concealed  all  com- 
ponents except  the  mike;  the  remote 
control  unit  was  installed  on  the  back 
wall  of  the  auditorium,  and  the  am- 
plifier located  close  to  the  mike. 


KEN 


D 


DEPENDABLE        RADIO        TUBES 


GIVE    YOUR    CUSTOMERS    BETTER 
SERVICE  with 

MODEL  1670  VIBRATOR-TESTER 

An  Approved  DeLuxe  Model 


DEALER  PRICE  (metal  case) 


$2400 


•  Tests   All   Types   6   Volt   Vibrators 

•  Three   Scale   Triplett   Instrument 

•  Uses   Approved    5000   Ohms    Load 

*Yibrators  should  never  need  replace- 
ment until  the  contacts  are  worn  to 
the  extent  that  the  output  of  the 
power  packs  is  unsteady  or  the  vi- 
brator fails  to  start  properly  on  a 
low  "A"  battery. 

This  new  Triplett  Vibrator  Tester  has  been  constructed 
with  the  engineering  cooperation  of  leading  manufacturers 
of  vibrators.  It  will  test  all  types  and  makes  (6  Volts) 
as  used  in  automotive  and  home  battery  receivers.  A 
load  of  5000  ohms  recommended  by  vibrator  engineers 
is  applied.  The  3-meter  scales  are:  0-10  volt  scale 
shows  voltage  input  to  the  vibrator;  the  GOOD-BAD 
scale  shows  output;  scale  marked  0-100  per  cent  shows 
per  cent  of  output  voltage  as  reflected  by  change  in  in- 
put voltage.  Low  damped  meter  permits  needle  to  fol- 
low voltage  fluctuations  caused  by  faulty  vibrator  con- 
tacts.    Sold    with   complete   instructions   on    how  to  test. 

MODEL  1670  in  Portable  Metal  Case  with  Black  Wrinkle 

Finish  .   .   .   Attractive   Etched    Panel 

DEALER    NET    $24.00 

MODEL    1670    in    Portable    Leatherette    Case    with    Re- 
movable  Cover   and    Compartment   for   Accessories. 
DEALER    NET   $28.00 

SEE  THE  NEW  TRIPLETT  193S-39  LINE 

AT    THE 

CHICAGO    JUNE    RADIO    PARTS     SHOW 

BOOTHS    213-15  —  HENRY    AVEME 


'A££MOKl 
^ELECTRICAL    INSTRUMENTS 

THE    TRIPLETT    ELECTRICAL    INSTRUMENT    CO.    I 

195  Harmon  Dr.,  Bluffton,  Ohio  ! 

i 

Please    send   me   more   information    on  ■ 

□  Model   1670   Vibrator-Tester 

n  I  ani  also  interested  in   i 


May,  1938 


49 


TRADE  FLASHES 


First  models  of  the  1939  Sonora  line 
are  released  to  the  trade  on  May  15. 
according  to  Joe  Gerl.  president  of 
Sonora  Radio  rf-  Television  Corp.. 
Merchandise  Mart,  Chicago.  Produc- 
tion lines  are  running  full  capacity  on 
the  firm's  new  push  hutton  tuning,  the 
Dyna-Boost  circuit  and  the  Battery 
Sentry.  Mr.  Gerl  returned  recently 
after  an  extended  trip  East  and  re- 
ports extra  enthusiasm  among  jobbers 
for  the  completeness,  the  styling,  and 
the  plus  features  of  the  line. 

A  policy  of  prompt  delivery  for  both 
counter  and  mail  order  trade  is  cur- 
rently being  emphasized  by  Federated 
Purchaser,  Inc..  at  25  Park  Place.  New- 
York  City,  and  at  343  Boulevard  of 
the  Allies,  Pittsburgh,  since  Dave  Or- 
al ont  took  over  the  reins  of  the  com- 


pany. The  firm  also  continues  its 
policy  of  stocking  parts  for  very  old 
sets. 

Curt  'Wessel.  who  was  for  23  years 
a  prominent  figure  in  radio  trade  pub- 
lishing, died  suddenly  of  a  heart  at- 
tack at  Shippan  Point.  Conn.,  on 
April  29. 

Arthur  C.  Ansley  of  Ansley  Radio 
Corp.  has  returned  to  New  York  from 
a  long  trade  trip  through  the  middle 
West  and  South.  He  went  to  Kansas 
City,  south  to  Texas  and  New  Orleans. 
Mr.  Ansley  reports  a  tendency  among 
dealers  to  stock  fewer  lines  and  to 
favor  those  products  which  have  price 
protection. 

Marconiphone,  Inc..  679  Madison 
Ave.,  New  York  City,  have  announced 
nation-wide  promotions  on  a  new 
radio-phonograph  portable  combina- 
tion to  retail  under  $100.  Orders  are 
now  being  taken  for  this  recentlv  an- 


nounced Marconiphone  model.  D6,  an 
AC-DC  instrument  finished  in  brown 
imitation  leather. 

Sales  manager  James  J.  Darin  of 
Detrola  Corp.  has  made  a  sales  report 
in  which  he  found  that  on  May  5  last 
Detrola  shipped  75  per  cent  more  ra- 
dios than  on  any  day  during  their 
1937  holiday  season.  The  report  indi- 
cates strong  acceptance  for  Pee  Wee 
sets  among  jobbers  and  dealers. 

Distributors  M.  A.  Hartley  rf  Co., 
formerly  of  •  18  Middlebrook  Ave., 
Staunton,  Va.,  recently  held  a  feature 
opening  of  their  new  store  at  387 
Central  Ave..  Staunton.  On  the  pro- 
gram were  Prof.  G.  M.  P.  Fitzgibbons 
with  a  demonstraiton  of  hypnotism, 
and  Mr.  Westbrook  of  Westinghouse 
with  a  lecture  on  sodium  light,  black 
light  and  the  sterile  lamp.  Featured 
also  were  manufacturers'  exhibits, 
door  prizes,  refreshments. 


Amplifier  and  Sound  System  Specifications  —  Corrections  to  listing  in  April  issue,  page  42. 


Amp.              S.  S.            Amp.            S.  S. 

Rated 
watt» 

C7 

dis- 
tor- 
tion 

Max. 

watts 

Gain             N 

o.  of  No.  of 
uts  mixers 

No.  of 
tone 
con- 
trols 

No.  ol 
tubes 

Output 

Line 
watts 

Power 
source 

Speakers 

No.  &  Type 
size 

Type 
mike 

Phono 

No.                 No.              price            price 

DB 

Input 
resist 

Tubes 

Class 

table 

Operadio  Mfg.  Co.,  13th  &  Indiana.  St.  Cf 
813                108                  S  36.50*      S  86.50* 
1010             410                     55.00#        11000  = 
1010            414                    55.00*       125:001 
822P             124W                  83.00#        207.00s 
835                120.00* 

arles.  Ill 
8 
14 
14 
22 
35 
70 
55 

25 

— -"Operadio 

5         15. 
5         20 
5         20 
5         40 
5         52 
5       104 
5         80 

5         35 

126 

130 
130 
131 
134 

28 
139 

65 
130 

2}4  Meg. 
2H  Meg. 
2K  Meg. 
2y2  Meg. 
2y2  Meg. 
1000  ohms 
2M  Meg. 
2K  Meg. 
2M  Meg. 

3 
3 
3 
3 

4 
2 
2 

9 
1 

5 
2 
2 

1 
1 
1 
1 
1 

1 
1 

1 

4 

7 
7 

13 

4 
6 

6L6G 

6V6G 

6V6G 

6L6G 

6L6G 

6L6G 

6L6G 

76 

6L6G 

A 

A 

A 

A 

AB 

AB 

AB 

A 

A 

90 
90 
125 
130 
210 
150 
25 
100 

AC 

AC 

AC 

AC 

AC 

AC 

AC  ■ 

AC 

6V.  DC 

1-10" 

2-8" 
2-12" 
2-12" 

EE 

PM 
PM 
EE 

PM 

C 

sv 
sv 
sc 

D 

No 

No 
No 
No 
No 

870               123.001 

No 

855                184.00* 

No 

Pre- Amp  660                         81.00* 

No 

162                172                    180.00*        255.00* 
*  The  above  prices  do  not  include  tubes. 

2-12" 

Yes 

sUPf-TS 

ntoR' 


••P*     „VtCTS 

P»OB       4G0V.0 

,.i   am.      drive" 

Putins    *    "VI  ,«*«*' 

remote    <■ 
\-lWatu«- 


^fcr 


•  The  new  CXAROSTAT  Midget  Con- 
trols "stay  put".  Can  be  installed  and 
forgotten.    Longest   service    life. 

•  Vegligible  resistance  change  after 
cycling  10.000  times.  Antenna  and  C- 
bias   control   still   perfect  after  28,000. 

•  Controls  remain  quiet  from  first  to 
last.  Shafts  turn  freely  and  snugly. 
Power   switch    remains    OIv. 

•  Jobbers  and  servicemen  most  enthu- 
siastic over  these  new  Cl.AROSTAT 
Midgets. 


See  IJs  at  the  Show! 

•  Get  our  story  first  hand — Booth  at  208 
Steinmetz  Ave.  Otherwise,  write  for  new 
208-page    pocket-sized    service    manual. 


50 


Radio  Today 


•     INDEX     • 
TO  ADVERTISEMENTS 


Page 

AEROVOX'  CORP .10 

AMERICAN     MICROPHONE    CO..     INC 52 

AMPERITE    CO 44 

ARCTURUS    RADIO    TUBE    CO 37 

CENTRALAB      4S 

CLAROSTAT    MFG.   CO 50 

CONS.  WIRE   &  ASSOC.    CORPS 46 

CORNISH   WIRE   CO 52 

CROSLEY    RADIO    CORP 4.5 

CROWE    NAME    PLATE   &    MFG.    CO 46 

GALVIN     MFG.    CORP Cover  4 

GENERAL    ELECTRIC     CO Cover  2 

HALLDORSON    CO 46 

HYGRADE    SYLVANIA    CORP 35 

INTERNATIONAL    RESISTANCE    CO 43 

JANETTE    MFG.    CO 48 

KEN-RAD    TUBE   &   LAMP   CORP 49 

MALLORY    &    CO..    INC..    P.    R 1 

PHILCO   RADIO   J  TELEV.   CORP..  SET  DIV.  6 

PHILCO  RADIO  &  TELEV.  CORP..  TUBE  DIV.  3 

PIONEER    GEN-E-MOTOR   CORP 50 

PLEASANTAIRE    CORP 37 

QUAM-NICHOLS    CO 46 

RADIO    PARTS    SHOW    39 

RADIO    SERVICEMEN    OF    AMERICA.    INC...  42 

RADOLEK   CO 52 

RAYTHEON   PRODUCTION   CORP Cover  3 

RCA    MFG.    CO..    INC..    COMM'L    SOUND....  41 

RCA    MFG.    CO.,     INC..     RADIOTRON     DIV...  25 

RCA    MFG.    CO.,    INC..    RCA-VICTOR    DIV....  23 

READRITE    METER    WORKS    47 

REGAL    AMPLIFIER     MFG.    CORP 47 

RIDER.    JOHN    F 43 

SOLAR    MFG.    CORP 51 

SONORA    RADIO    &   TELEV.    CORP 21 

SPRAGUE    PRODUCTS    CO 33 

STROMBERG-CARLSON    TELE.    MFG.    CO 2 

TRIPLETT    ELEC.    INSTRUMENT    CO 49 

TUNG-SOL    LAMP    WORKS.    INC 41 

UNIVERSAL    CAMERA   CORP 36 

VIBRALOC    MFG.   CO 52 

WEBSTER-CHICAGO     38 

WESTON    ELEC.    INSTRUMENT   CORP 27 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against 
the  possibility  of  an  occasional  change 
or  omission   in  the   preparation  of  this  index. 


SMALLER METAL  SEALED 


SOLAR  MINICAP  Dry  Electrolytic  Capacitors 
mark  much  more  than  an  advance  in  an  art. 
They  mean  that  filters  now  occupy  less  space, 
cost  less,  have  longer  life  because  of  permanent 
"sealing,  are  used  in  single  units  to  simplify  both 
production  and  stock-keeping,  and  are  "stand- 
ard" parts. 

Solar  engineers  have  been  the  pioneers  in  ad- 
vanced methods  of  making  radically  smaller 
dry  electrolytic  capacitors,  "little  giants",  intro- 
duced three  years  ago,  were  the  original  ultra- 
compact  drys.  Now  we  announce  further  size 
reduction,  superior  characteristics  and  out- 
standing utility  in  the  new  Minicaps.  You  will 
find  them  in  thousands  of  radio  sets— and  they 
will  stay  there. 

Details  upon  Request. 
SOLAR  MFG.  CO.,  599  Bway.,  New  York 


May,  1938 


51 


P-A  CABLES 

• 

HOOK- UP 
WIRES 


MADE   BY 


FOR 


Write  for  Complete  Catalog 

CORNISH  WIRE  CO. 

INCORPORATED 
30  CHURCH  ST.,  NEW  YORK  CITY 


Everything  you  need  in  radio.  It's  all  in  this 
new  RADOLEK  RADIO  PROFIT  GUIDE. 
Every  repair  part  for  every  receiver.  Newest 
radio  receivers.  New  1938  model  public  address 
amplifiers,  outputs  for  5  to  100  watts.  New 
model  public  address  speakers.  Test  instruments. 
Technical  books.  Special  equipment.  Leading 
standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 

And  everything  under  one  roof.  You  get  what 
you  want  promptly,  and  exactly  what  you  want. 
Radolek's  immense  stock  plus  Radolek's  efficient 
organization  insures  you  fastest  service.  25,000 
service  men  depend  on  this  service  and  benefit 
by  Radolek's  lowest  prices.  Send  now  for  your 
copy  of  Radolek's  Radio  Profit  Guide.  It  will 
help  you  make  more  money. 

RADOLEK--- 

601  W.  Randolph,  Chicago,  Dept.  D-19 

Send  me  the  1938  Radolek  Radio  Profit  Guide  FREE., 


AMERICAN  RADIO  ASSN. 

AT  CHICAGO,  SEPT.  30-OCT.  2 

*  Marcus  W.  Hinson,  secretary 
of  the  American  Radio  Association, 
500  North  Dearborn  Street,  Chi- 
cago, has  outlined  some  of  the  aims 
of  his  organization  of  radio  service- 
men as  follows: 

"An  educational  program  is  being 
started  to  provide  members  with 
fundamental  facts  about  merchan- 
dising and  the  effect  such  princi- 
ples have  on  net  income.  To  begin 
with,  members  will  be  informed 
about  companies  that  use  more 
than  one  list  price  on  the  same 
item  in  different  parts  of  the  trade. 

"Standards  of  quality  will  be 
recommended  by  the  American 
Radio  Association  so  that  members 
will  have  a  means  of  protecting 
themselves  in  regard  to  ratings  of 
condensers,  transformers,  volume 
controls,  tubes,  resistors,  etc.  An 
engineering  laboratory  is  being  re- 
tained to  check  the  reliability  of 
ratings.  A  file  on  the  financial  re- 
sponsibility, integrity,  reliability 
and  business  habits,  of  replacement 
merchandise  manufacturers  will  be 
kept  for  the  benefit  of  members 
only.  Many  reliable  manufacturers 
are  giving  valuable  assistance  in 
the  shaping  of  our  program  on 
merchandising.  Others  are  invited 
to  keep  in  contact  with  national 
headquarters." 

The  date  for  the  National  Con- 
vention of  Radio  Service  Engineers 
and  Radio  Laboratory  Owners, 
sponsored  by  the  Association,  has 
been  changed  to  Sept.  30,  Oct.  1 
and  2.  In  conjunction  with  the  con- 
vention will  be  a  big  National  Radio 
Service  Equipment  Show,  to  be 
held  on  the  19th  floor  of  the  Hotel 
LaSalle,  Chicago,  instead  of  at  the 
Sherman  House  as  originally 
planned.  Keynote  is  "Profits";  an 
estimated   5,000  will   attend. 


*  According  to  /.  Finkel,  of  Star 
Machine  Manufacturers,  Inc..  mak- 
ers of  auto  radio  controls,  two  new 
sales  representatives  for  the  com- 
pany have  been  named.  These  are 
B.  L.  MacPherson,  1919  Wells  St., 
Ft.  Wayne,  Ind.,  for  the  states  of 
Indiana  and  Kentucky,  and  the 
H.   E.   Walton    Co..   2111  Woodward 


Ave.,   Detroit,   Mich.,   for    the   state 
of  Michigan. 

*  •/.  H.  Clippinger,  vice-presi- 
dent in  charge  of  sales  of  the  Con- 
tinental Radio  &  Television  Corp.. 
in  Chicago,  announced  this  week 
several  expanded  territories  for 
members  of  the  Admiral  sales  or- 
ganization. Maurice  Despres  and 
Lou  Dorfman  will  be  in  charge  of 
Admiral  activities  in  all  of  New 
York  State,  including  Metropolitan 
New  York  territory  and  Connecti- 
cut. Sid  Gatty,  in  addition  to  han- 
dling Eastern  Pennsylvania,  Vir- 
ginia, Maryland  and  the  District  of 
Columbia,  will  also  be  in  charge  of 
Admiral  activities  in  Scranton  and 
Wilkes-Barre. 


Prices 
Complete 
Model  R     $25.00 
Model  B      $40.00 
Model  C     $75.00 
Model  D    $175.00 


FIDELITY!  TONE  RANGE!  DISTOR- 
TIONLESS POWER!  BEAUTY  OF  DE- 
SIGN and  EASE  OF  INSTALLATION! 
ITS  ALL  THERE  IN  A  VIBRALOC  .  .  . 

Studio  or  Stadium  coverage  with  the 
same  reproducer  .  .  .  "if  you're  doubt- 
ful .  .  .  we've  got  the  proof  .  .  . 
just  write." 

Patented  Acoustical  features  incorporated  in  the 
new  VIBRALOC  REPRODUCER  reveal,  for  the  first 
time,  brilliant  definition  in  tone  blending  at  any 
volume  level.  The  usual  beam  or  searchlight  effect 
is  rot  present  in  the  VIBRALOC  method  of  sound 
distribution,  resulting  in  freedom  from  reflection 
distortion  and  other  acoustical  troubles. 
Locking  mechanical  vibrations  at  the  source  of  audio 
sound  distribution  eliminates  disturbance  of  the 
original  wave  form,  permitting  movement,  into  free 
space,  minus  pressure  re-shaping  or  the  effects  of 
resistance  to  coil   movement. 

Order   Direct   Until    Your   Jobber 
fs   Stocked. 

JOBBERS!!    DEALERS!! 

Exclusive  Territories  Available! 

Catalogs  &  Proposition  Upon  Request. 


Address    

Serviceman?  □ 


Dealer?  D         Experimenter?  □ 


The  NEW  "CLIPPER"  DYNAMIC 

Another  American  Moving-Coil  Microphone,  Featuring 
HIGH  OUTPUT— SMALL  SIZE 

RUGGEDNESS— FIDELITY 

TRIM— EFFICIENT  DESIGN 

LONG  LIFE— STABILITY 

D7  and  D7T  Microphones  come  complete  with  12%'  R,  J  cable  and 
ilmphenol  plug.  Chrome  finish.  5/g-27  Connector.  Over-all  height, 
2V2".  Diameter,   1  V2".  Net  Weight.  8%  ounces. 

Request  Catalog  No.  27  for  Complete  Details. 


AMERICAN  MICROPHONE  CO.,  Inc. 

LOS   ANGELES,    CALIF. 


52 


Radio  Todav 


^^^m^^^mmm 


> 


NEW  YORK  AND  CHICAGO  POLICE 
flOHTCRIMS  WITH  RADIOS 
100%  RAYTHEON  EQUIPPED! 

Where  absolute  dependability  of  a  radio  for  the  protection  of  lives  and  property 
is  as  important  as  in  a  police  squad  car — why  do  the  two  largest  metropolitan  cities  in 
the  United  States  choose  Raytheon  tubes? 

The  answer  is  in  Raytheon's  outstanding  record  of  performance — in  rugged- 
ness  and  long  life!  That's  because  Raytheon  auto  set  tubes  are  especially  designed  and 
constructed  for  maximum  life  under  adverse  conditions  and  over  the  wide  range  of 
voltages  in  an  automobile  battery — and  to  withstand  the  jarring  and  pounding  on  the 
roughest  of  roads. 

The  more  efficient  police  forces  in  hundreds  of  smaller  cities,  too,  have  Raytheon- 
equipped  radios  in  their  squad  cars. 

Play  safe,  too!  Insure  more  efficient  operation  of  the  sets  you  service.  Replace 
with  these  same  Raytheons — and  enjoy  greater  permanent  tube  profits! 

Visit  the  Raytheon  booth  at  the  Radio  Parts  Show,  Booth  207  Henry  Avenue,  Stevens 
Hotel,  June  8,  9,  10  and  11,  Chicago. 


CHICAGO     •     NEW  YORK 
ATLANTA 


NEWTON,  MASS. 
SAN  FRANCISCO 


"WORLD'S  LARGEST  EXCLUSIVE 


RADIO  TUBE  MANUFACTURERS" 


MotSSota  HOME  Oiadic 

ANNOUNCEMENT 


FAST  SELLING  LINE 

The  1939  Motorola  Home  Radio 
line  will  be  short,  with  only  a  con- 
centrated selection  of  the  fastest 
selling  models  in  the  most  popular 
price  brackets. 

• 

NO  PRESEASON  LOADING 

Motorola  will  utilize  no  high- 
pressure  methods  to  obtain  pre- 
season loading.  No  driving  tactics 
to  make  you  buy  in  May  what  you 
won't  sell  until  September. 


TABLE  MODELS  IN  JUNE 

New  Motorola  Table  Models  will 
be  ready  in  June  for  summer  sell- 
ing. Plenty  of  time  to  catch  the 
baseball  and  outing  season  con- 
sumer market. 


CONSOLES  IN  JULY 

Motorola's  line  of  Consoles  will  be 
available  in  July.  Right  when 
you  need  them  for  planning  your 
Fall  selling  activity. 


SOMETHING  MORE 
THAN  PUSH-BUTTONS 

The  1939  Motorolas  will  have  fea- 
tures that  intrigue  the  public  and 
make  them  want  to  buy.  New,  ad- 
vanced, clever,  desirable  features 
— something  more  than  just  Push- 
Buttons  or  Remote  Control.  The 
last    word    in    radio    convenience. 


NEWEST  STYLING 

Motorola  will  present  new,  salable 
merchandise  for  1939.  Up-to-the- 
minute,  new  and  beautiful  styling 
with  plenty  of  eye  appeal. 


BUY  WHAT  YOU  NEED 
WHEN  YOU  NEED  IT 

Motorola  urges  dealers  to  adopt  a 
safe,  sane  and  sound  buying  pol- 
icy. No  need  to  be  stampeded  into 
buying  "futures."  There  is  a  real 
profit  in  quick  turn-over. 


Bank  6h  . .  and  WvtU . .  Motorola 


GALVIN  MFG.  CORPORATION  •  CHICAGO 


A  PEEK  AT  THE  SHOW 

AND  THE  NEW  RADIO  SETS 


_ 


Ifou  ate  oonxlUculUf,  invited  ta  pAeaieiu 


TH 


E  SCOOP  LINE  of 


SEE  THE  LINE  WITH  THE  GREATEST  ROLL  CALL 
OF  PRECEDENT  BREAKING  FEATURES  IN  OUR  RADIO  HISTORY 


Hold  everything!  Until  you've  previewed  this  sensational 
new  G-E  Radio  line.  Watch  for  announcement  of  show- 
ings in  your  vicinity  arranged  by  your  local  G-E  Radio 
Distributor  ...  or  get  in  touch  with  him  for  full  details. 


GENERAL  (M)  ELECTRIC 


Limtlt  Brings  New  Stars  into  the 
MALLORY-YAXLEY   Family 


Radio  service  engineers  depend  on  Mallory  .  .  . 
for  the  finest  and  most  efficient  replacement 
parts  .  .  .  and  for  the  pioneering  that  keeps 
radio  service  abreast  of  radio  manufacturing. 

/  Midget  Replacement  Controls 
with  Plug -In  Shafts  ...  10  new 

Mallory -Yaxley   Midget   Volume 
Controls  plus  17  Plug -In  Shafts  give 
you  the  servicing  range  of  170  or- 
dinary Exact  Replace- 
ment Controls  with 
fixed  shafts. 


The  2nd  Edition 
Mallory-Yaxley 
Radio  Service 
Encyclopedia. 

Contains  twice  as  mu 
formation  as  the  firs 
MYE.  17,000  receivers  analyzed. 
All  the  dope  on  every  system  of 

automatic   tuning alignment . . 

audio  degeneration.  Complete  tube  charts. 
You  wouldn't  believe  that  such  a  book  could 
be  possible.  It  will  pay  for  itself  in  the  time 
you  save  on  one  job. 

P.  R.  MALLORY  &  CO.,  Inc. 

INDIANAPOLIS  INDIANA 

Cable  Address  — PELMALLO 


ng-Life  Vibrators, 
ced  right.  Mallory  Re- 
placement Vibrators  assure  low- 
est cost  per  "use  hour"  and 
trouble  free  low  life. 


REPLACEMENT 
CONDENSERS... VIBRATORS 

*      REPLACEMENT       * 
VOLUME   CONTROLS 

RADIO  TODAY,  June,  1938,  Vol.  IV,  No.  6,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription  yearly 
$1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24,  1936,  at 
the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.    Printed  in  U.S.A.    Member  of  A.  B.  C.    Copyright  1938  by  Caldwell-Clements,  Inc. 


"I  HAVE 


..tm  .■j«.*g.muiiMa»iin  i 


lftv£|ttitLL.a 


MANY  OF  YOUR 
PROSPECTS 


•>* 


ka/jscdc/* 


a  CAN  help  you  close  sales  with  many  of 
your  good  prospects  who  have  already 
purchased  automobiles  or  household  appli- 
ances on  the  Commercial  Credit  time-payment 
plan.  They  appreciate  our  friendly,  fair  treat- 
ment. When  you  talk  terms  to  them  you  find 
them  "sold"  on  Commercial  Credit  financing. 


KOU/i 


I  know  your  local  credit  picture  from  A  to  Z. 
I  know  how  to  protect  you  from  risky  sales.  I 


make  collections  in  a  frictionless  way  that 
relieves  you  of  worry  or  embarrassment.  The 
resources  of  a  great  national  organization  are 
back  of  me,  to  finance  all  the  sound  business 
you  can  produce,  regardless  of  temporary 
local  conditions. 

Every  dealer  who  uses  our  service  gets 
the  complete  cooperation  he's  looking  for. 

If  you  want  to  know  more,  I'm  easy  to  find. 
I'm  your  local  Commercial  Credit  manager, 
ready  to  serve  you  from  any  one  of  more  than 
200  offices  in  principal  cities  of  the  United 
States  and  Canada.  Call  me  up. 

Commercial  Credit  Company 

COMMERCIAL  BANKERS 
HEADQUARTERS  BALTIMORE  CONSOLIDATED  CAPITAL  AND  SURPLUS  OVER  $64,000,000 

Serving  Manufacturers,  Distributors  and  Dealers  Through  More  Than  200  Offices  in  the  United  States  and  Canada 

2  Radio  Today 


Mctctcta  tiOM£0Zadic 

Will  Feature 

SOMETHING  MORE  THAN  PUSH-BUTTONS  .  .  . 
SOMETHING  MORE  THAN  REMOTE  CONTROL 

The  1939  Motorola  Home  Radio  line  incorporates  many  new, 
practical  features  that  will  capture  the  imagination  of  Mr.  & 
Mrs.  John  Q.  Public.  Buyers  will  be  intrigued  with  Motorola's 
new  conveniences  and  delighted  with  its  honest  values.  Motorola 
"has  what  it  takes"  to  close  sales  this  year — especially  in  the 
brackets  under  one  hundred  dollars. 


SELL  THE  NEWEST 

Your  customers  will  really  "go  for" 
the  new  Motorola  which  tunes  it- 
self— a  unique  instrument  with  no 
auxiliary  apparatus — positive,  ac- 
curate and  foolproof  in  operation. 
• 

BEAUTIFULLY  STYLED 

Motorola's  cabinets  will  be  truly 
beautiful  pieces  of  furniture.  Your 
women  customers  will  appreciate 
their  "good  taste"  adaptability  to 
any  room  setting. 
• 

TABLE  MODELS  READY 

New  lower  priced  1939  Motorola 
Table  models  will  be  in  your  hands 
shortly.  Look  for  performance  that 
ought  to  cost  $10.00  more. 


MOTOROLA  CONSOLES 
WHEN  YOU  NEED  THEM 

Wise  dealers  who  adopt  a  sound 
buying  policy  will  profit  by  wait- 
ing for  the  July  showing  of  1939 
Motorola  Consoles.  Out  in  plenty 
of  time  to  stock  up  for  Fall  selling. 


DON'T  TIE  UP 
YOUR  CREDIT! 

Motorola's  policy  of  supplying  ex- 
citing NEW  merchandise  when 
your  retail  selling  actually  starts 
permits  you  to  buy  what  you  need 
when  you  need  it  without  tying  up 
your  credit.  It's  better  to  take  your 
profit  out  of  fast  moving  items 
that  insure  a  quick  "turnover." 


Don't  Bu\i  in  Cune  What  Ijou  Won't  £ell  lentil  £eptembe\ 

GALVIN  MFG.  CORPORATION  •  CHICAGO 


June,  1938 


ADVANCE  INFORMATION  ON  THE 

GREATEST  PROFIT  SET-UP 

IN  YEARS 


F.   A.    D.   ANDREA 

President 

ANDREA    RADIO  CORP 


TT  T1THIN  the  next  30  days,  Andrea  Radio,  under  the  ownership  and  per- 
sonal management  of  Frank  A.  D.  Andrea,  will  introduce  a  complete  line 

of  radio  receivers.  The  line  will  be  distributed  and  sold  by  methods  so  different 
from  present  practices  that  the  better  dealers,  the  real  merchandisers,  will  say,  "Here's  my 
chance  to  go  to  work  on  radio  sales  again.     I    can   make   money  with   this   Andrea  set-up"! 

As  one  of  radio's  most  experienced  organizations,  Andrea  Radio  Corp.  is  determined  and  able 
to  adhere  to  the  same  sound  merchandising  methods  that  were  proved  so  successful  by  my  old 
company  when  it  was  under  my  sole  ownership  and  management  from  1920  to  1932.  Controlled 
production,  carefully  gauged  to  consumption,  avoided  dumping  and  ruinous  price  competition. 
Today,  this  is  all  the  more  possible  for  Andrea  Radio  because  its  world-wide  sales  make  us 
independent  of  seasonal  domestic  conditions. 

The  Andrea  set-up  is  not  planned  at  all  for  dealers  who  are  willing  to  sell  at  cost-plus-a-dollar 
profit.  It  is  not  intended  for  chain  stores  which  sell  at  cut  prices.  Nor  is  it  for  sub-jobbers  or 
"industrials"  which  offer  40  per  cent  discounts  to  members  of  large  organizations. 

But  here  is  a  real  thrill  for  radio  salesmen,  because  they  know  that  their  prospects  won't  say,  "I 
like  that  set,  but  I  can  get  it  cheaper  from  a  friend  who's  in  the  business."  Or,  "I'm  going 
to  look  around  a  bit.  I  think  I've  seen  it  for  less  down  the  street."  Or,  "I'll  wait  until  after 
Christmas  when  you'll  be  giving  these  sets  away." 

Naturally,  some  of  the  dealers  who  survived  the  kicking  around  they  took  last  season  will  again 
forget  that  the  only  real  reason  for  being  in  the  radio  business  is  to  make  a  fair  profit  on  sales. 
But  those  dealers  who  have  forgotten  about  profits  won't  compete  with  Andrea  dealers  because 
the  Andrea  set-up  is  only  for  able,  aggressive,  progressive  merchandisers. 

The  1939  Andrea  models  are  outstanding  in  tone  quality  and  in  advanced  engineering  features 
— with  cabinet  designs  whose  beauty  and  distinction  set  them  apart  from  all  others.  Details  will 
be  made  public  within  30  days.  Each  model  will  provide  the  extra 
measure  of  satisfaction  to  the  customer  and  the  legitimate  profit  to 
the  dealer  that  has  characterized  Andrea  equipment  since  1920. 
Andrea  Radio  dealers  will  do  business  at  a  profit.  If  you're  inter- 
ested in  profits,  write  for  information  on  the  Andrea  Radio   line. 


NOTICE:  Every  radio  set 
manufactured  by  Mr.  F.  A. 
D.  ANDREA  since  1 934  bears 
the  full  name  ANDREA.  No 
set  produced  since  1934  is 
of  Andrea  manufacture  un- 
less it  carries  the  Andrea 
name  spelled  out  as  it  ap- 
pears below. 


l<L$.&M*«x 


"Onctatt/Baclia" 


4823  48TH  AVENUE 
WOODSIDE,  NEW  YORK 


Radio  Today 


I 


TU 


to  those  who  are  just  looking  around" 

NEW  PHILCO  models  on  display  in  your  store  will  bring 
"lookers"  as  well  as  buyers.  But  even  those  who  just 
come  to  look  can  be  turned  into  buyers  of  Philco  Tubes!  If 
they're  not  quite  ready  to  place  an  order  for  a  1939  Philco 
.  .  .  offer  to  check  the  tubes  in  their  present  sets.  The  very 
fact  that  they're  interested  in  a  new  radio  is  the  best  evi- 
dence in  the  world  that  they're  not  completely  satisfied 
with  the  set  now  in  their  home  .  .  .  and  in  all  probability, 
one  or  more  tubes  are  in  an  old,  weakened  condition. 

Capitalize  on  curiosity!  If  you  can't  make  a  new  Philco 
sale  .  .  .  sell  the  Philco  Tubes  they  certainly  need  for  proper, 
efficient  operation  of  their  present  sets.  You'll  not  only 
make  an  immediate  profit  .  .  .  but  you'll  lay  the  founda- 
tion for  a  future  Philco  set  sale! 


77i&  <%2Aiad  7uded.  in  t&e  "Wo^ct  f1d-  SeM 


RCA  Continues  to  Build 
A  mericas  Radio  A  udience! 


Better  programs— which  increase 
the  demand  for  better  radios — 
are  constantly  being  fostered  by 
NBC's  own  unsponsored  pro- 
grams .  .  .  they  constitute  70%  of 
NBC's  time  on  the  air! 


NBC  HIGHLIGHTS 

These  are  but  a  few  of  the  many 
fine  programs  which  make  up  NBC's 

70%  unsponsored  time  on  the  air! 

+  Metropolitan  Opera  Broadcasts 

*  NBC  Symphony  Broadcasts 

*  Music  Appreciation  Hour 

*  National  Farm  &  Home  Hour 

*  NBC  Radio  Guild 

*  America's  Town  Meeting  of  the  Air 

*  The  Radio  Pulpit 

*  University  of  Chicago  Round  Table 


RCA  presents  the  Magic  Key  every  Sunday,  2  to 
3  P.M.,  E.  D.  S.  T. ,  on  the  NBC  Blue  Network. 


During  1937  the  National  Broad- 
casting Company,  a  service  of 
RCA,  broadcast  more  than  5  0, 000 
unsponsored  programs.  Such  ser- 
vice accounted  for  70%  of  all  NBC 
time  on  the  air.  The  variety  offered 
was  as  wide  as  human  interests. 
Through  the  miracle  of  radio 
such  programs  bring  to  millions 
entertainment,  information  and 
help  which  they  could  not  receive 
otherwise.  Through  NBC,  living 
rooms  become  boxes  at  the  Met- 
ropolitan Opera.  Or  they  are  filled 
with  the  sonorous  cadences  of 
great  symphonies,  played  by  the 
NBC  Symphony  Orchestra,  con- 


ducted by  Arturo  Toscanini,  or 
some  other  famous  conductor. 

Again,  it  may  bccurrent  prices 
of  eggs,  or  pork,  or  a  discussion 
of  books  and  plays.  But  whatever 
the  subject,  if  it  is  of  interest  to 
any  considerable  part  of  the  pub- 
lic, NBC  provides  programs 
which  deal  with  it. 

Programs  such  as  these,  to- 
gether with  the  fine  programs 
sponsored  by  NBC  advertisers, 
have  been  largely  responsible  for 
the  increased  sale  of  radios.  And 
in  offering  listeners  better  radios 
RCA  further  stimulates  America's 
interest  in  fine  radio  programs. 


Radio  Corporation  of  America 

RADIO  CITY,  N.  Y. 

RCA  MANUFACTURING  CO.,  INC.        RCA  INSTITUTES,  INC.        RCA  COMMUNICATIONS,  INC. 
RADIOMARINE  CORPORATION  OF  AMERICA  NATIONAL  BROADCASTING  COMPANY 


Radio  Today 


& 


& 


ti* 


\* 


tftf 


toft 


l\BVJTOB 


OPPORTUNITY 


34  GREAT  MODELS 

Now — for  1939,  SONORA  offers  a  new  opportunity 
— an  unparalleled  opportunity  for  profitable  distribu- 
tor operation.  SONORA  presents  a  complete  qual- 
ity line  of  1939  radios  with  a  powerful  sales  "punch" 
— a  line  of  34  magnificent  models  with  "eye"  appeal 
and  "Clear-as-a-Bell"  tone  appeal — priced  right  for 
today's  market — with  distributor  net  prices  that  mean 
exceptional  profits.  SONORA  fits  the  big,  waiting 
market  that  only  a  quality-built,  richly-toned,  intelli- 
gently-priced line  of  radios  can  command — and  the 
twenty-five  year, old  SONORA  reputation  backs  this 
new  line  of  sets — a  great  line  ranging  from  a  hand- 
sized  "Teeny-Weeny"  to  a  luxurious  12-Tube  all-wave 
console.  In  engineering,  in  styling,  in  beauty  of  tone 
and  of  cabinet  artistry,  SONORA  is  a  logical  distrib- 
utor choice.  In  price-range,  in  national  policy,  too, 
SONORA  brings  you  the  outstanding  radio  oppor- 
tunity for  1939! 


9  TUBE  MODEL  GA-66. 
Brilliant  three-band  A.C.  Super- 
het  in  outstanding  deluxe  cab- 
inet. Tunes  535-18100  K.C. 
Features:  Automatic  Push-But- 
ton  Tuning;  8"  Slide-Rule  Dial; 
Tone  Control;  A.V.C.;  9  Watts 
Output;  8"  Dynamic  Speaker; 
Pre-selector,  etc.  Size :  22"  x 
12"xll".  A  brilliant  SON- 
ORA presentation. 


7-TUBE  MODEL  FA-55.  A 
three-band  A.C.  Superhet  pre- 
sented in  a  smartly-styled 
1939  cabinet.  Tunes  535-18100 
K.C.  Includes:  SONORA 
Automatic  Push-Button  Tun- 
ing; 6"  Slide-Rule  Dial;  Tone 
Control;  A.V.C. ;  Wave  Trap; 
5  Watts  Output;  6"  Dynamic 
Speaker;  Dyna-Boost  Circuit, 
etc.      Size   18"  x  10"  x  8". 


Wtm 


J^'M  i  Lunyym  u^HU[ 


6  tube  m    '^^~ - — : _.  ^_  - 

per°    'Clear- 


SONORA  is  open  for  qualified  distributors 
for  territories  not  yet  adequately  represented. 
Write,  'phone  or  wire  for  complete  details. 


RADIO  &  TELEVISION  CORP. 

MERCHANDISE  MART  •   CHICAGO 


4ra*W 


s  for/ 

cab-  / 
>RA  / 
nier     / 


b,ack  bodv   £>,  alnut>  black  £,„      ?,,a°le  in  Vernier     / 


SINCE  1914  -  THE  LEADING  NAME  IN  THE  MUSIC  REPRODUCING  WORLD 


June,  1938 


HARRY  BOYD  BROWN 

National  Merchandising 
Manager  of  Philco 


NO  DEALER  CAN  AFFORD  TO 

BE  WITHOUT  IT-BUT  ONLY 

PHILCO  DEALERS  MAY  HAVE  IT! 


MYSTERY  CONTROL — the  greatest  radio  discovery  since 
radio  itself — an  amazing  invention  that  means  unparalleled 
retail  sales  for  Philco  radio  dealers. 


Think  of  it!  No  wires — no  cords — no  plug-in  connections  of  any  kind!  So 
small — so  light — so  compact  that  you  can  carry  it  anywhere  and  place  it  any- 
where. And  then — with  one  flick  of  the  finger — tune  in  any  one  of  8  different 
stations  from  any  place  in  the  home  within  enjoyable  hearing  distance  of  the  radio. 

Furthermore — the  volume  can  be  regulated — increased  or  decreased  as  you 
wish  it — and  the  radio  can  also  be  turned  off  from  this  same  Mystery  Control. 
And  each  Mystery  Control  Unit  is  "in  tune"  only  with  its  own  companion  receiver 
— no  chance  of  any  confusion — no  chance  of  any  effect  on  the  neighbor's  Mys- 
tery Control  receiver. 

No  radio  dealer  can  afford  to  be  without  this  thrilling,  fascinating,  phenom- 
inal  radio  invention — and  yet  only  Philco  dealers  may  have  it — only  Philco 
dealers  can  "cash  in"  on  the  vast  new  market  it  opens  up. 

Mystery  Control  comes  in  2  magnificent  Philco  models — the  Philco  116RX 
and  the  Philco  55RX — both  in  superb  new  styling — a  new  beauty  in  cabinet 
design  plus  a  new  high  standard  of  radio  performance.  Radios  so  new — so  dif- 
ferent— so  sensational  that  they  will  sell  in  volume  in  spite  of  business  condi- 
tions— anywhere. 

Yes,  and  these  2  Stars  of  the  radio  world — these  Philco  models  with  Mystery 
Control — will  also  sell  hundreds  of  thousands  of  other  Philco  models — because  the 
mystery,  magic  and  fascination  of  Mystery  Control  will  fill  your  store  with 
people — with  interested  prospects.  And  it  is  prospects — and  plenty  of  them — 
that  makes  it  possible  for  you  to  sell  radios  in  volume. 

And  what  a  magnificent  array  of  other  Philco  models  in  every  price  bracket. 
A  wide  variety  of  perfected  instant  Push-Button  Tuning  radios — furniture 
models — table  models — compacts.  Merchandise  of  irresistible  appeal — priced 
to  meet  conditions — priced  to  fit  the  purchasing  power  of  millions  of  pocketbooks — 
merchandise  that  is  bound  to  sell — depression  or  no  depression — good  times 
or  bad. 

In  other  words,  business  prosperity — real  selling  activity  is  here  again  for  the 
radio  dealer,  if  he  gets  the  Philco  franchise.  Therefore,  by  all  means,  get  in 
touch  with  the  Philco  distributor  in  your  territory  right  away.  Be  ready  to  sell 
and  deliver  the  very  day  that  Philco's  amazing  radio  values  are  offered  to  the 
American  buying  public. 


PHttC 


^^^^W^^ 


8 


Radio  Today 


ONLY  THE  BEGINNING! 

Radio,  youngest  of  industries,  has  only  started  to  grow 


Here's  a  chart  that  has  a  message  for  every  radio  man. 
Of  all  the  services  that  make  up  modern  living,  radio  is  the 
youngest.  Yet  it  is  still  expanding  at  a  rate  that  leaves 
other  services — like  the  telephone,  electric  light,  automo- 
bile — far  behind. 

Even  with  only  five  or  six  million  sets  to  be  sold  this 
year,  radio  is  still  the  wonder-business  of  the  age,  com- 
pared by  any  of  the  other  yardsticks  for  other  lines. 

Just  because  a  recession  is  in  progress  in  general  busi- 
ness at  the  moment,  radio  men  can't  afford  to  let  down. 

There  are  still  lots  of  radios  to  be  sold — still  people  who 
need  better  sets —  additional  sets;  need  new  tubes,  new 
parts,  new  antennas — need  these  more  now  than  ever 
before.    And  have  money  to  pay  for  them. 

Radio  men  can't  slow  down  now,  or  relax  their  efforts. 
Conditions  abroad  may  be  distressing;  affairs  in  Wash- 
ington and  Wall  Street  may  be  disappointing.  But  these 
are  not  excuses  for  the  radio  dealer  to  put  the  brakes  on 
his  own  efforts.  On  the  contrary  such  critical  news  situa- 
tions actually  help  to  increase  the  demand  for  radios  as 
people  insist  on  getting  the  vital  news  of  the  hour! 

New  leaders   will  come 

The  only  thing  that  will  put  radio  selling  back  on  its 
feet  is  to  keep  busy  going  out  after  business.  This  much 
the  radio  man  owes  to  his  family  and  dependents — owes 
to  the  organization  he  has  built  around  him  in  his  business. 

But  even  more  important  to  his  own  future  will  be 
another  result  of  effort  now — repeating  history  familiar 
to  most.  Back  in  1932,  when  a  real  depression  was  upon 
us,  and  things  looked  blackest,  some  firms  resignedly 
slowed  up   or  "folded."     But   others  initiated  policies   of 


aggressive  action,  and  went  out  and  got  what  husiness 
there  was.  Then  as  the  old  depression  lifted,  it  was  these 
tireless  workers  who  found  themselves  to  be  the  new 
leaders  in  their  fields — found  themselves  at  the  top  of  the 
ladder,  to  which  they  never  would  have  climbed  had  busi- 
ness just  been  "easy." 

The  same  switches  in  position  will  take  place  during 
the  present  recession.  Vigorous  fighters  will  grab  the 
opportunity  to  sail  ahead  of  stodgy  conservative  competi- 
tion. New  business  equities  will  be  established.  New 
names  will  arise,  to  shine  as  radio  leaders  in  their  com- 
munities. 

Possibilities  unlimited 

Radio  men  who  really  know  this  great  art  and  its  myriad 
potentialities  ahead,  will  never  lose  faith  in  it.  It  is  only 
unseeing  business  opportunists  that  suspect  "radio  is  at  the 
end  of  its  rope,"  because  they  know  no  better.  New  uses 
for  radio,  new  services,  facsimile  printers,  television,  mu- 
sical instruments,  are  all  in  the  magic  box  of  radio's 
future. 

Radio's  prizes-to-eome  are  of  surpassing  promise — they 
are  worth  fighting  for,  more  than  ever.  Out  of  the  present 
recession  will  come  new  leaders  for  radio's  bigger  days 
ahead. 

And  these  leaders  will  pull  themselves  into  front  rank 
by  the  energy  and  enterprise  they  display  now. 


O.  f/.   &JLdLurOJl 


i 


Editor,  Radio  Today 


June,  1938 


Vi/blD        O  O  J.  •»  J  J. 

•JUN  X5  ,'93g 

Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton  K.  Ulrich 


M.  E.  Herring 

Sales  Manager 


Orestes  H.  Caldwell 
Editor 


M.  Clements 
Publisher 


Copyright  193S 

Cald well-Clements,   Inc. 

480  Lexington  Ave. 

New  York,  N.  Y. 

Tel.  PLaza  3-1340 

Vol.  IV,  No.  6 


Member  Audit  Bureau  of  Circulations 


J.  M.  Skinner  and  the  new  Philco  "mys- 
tery control".  Dialing  box  at  hand, 
tunes  and  controls  volume  of  receiver 
in  background.     No  wires,  no  plug  in! 


CONVENTION  RUSH 

May  was  a  month  of  conventions  for 
many  manufacturers  and  their  dis- 
tributors. Zenith,  General  Electric, 
ECA- Victor,  Westinghouse,  Philco 
and  Stewart-Warner  held  their  meet- 
ings before  the  month  was  over.  The 
Emerson     distributor     convention     is 


scheduled  for  New  York  during  the 
week  of  June  20. 

At  Chicago,  June  7  to  11,  in  the 
Hotel  Stevens  and  vicinity,  will  be 
held  a  series  of  radio-trade  gatherings, 
centered  around  the  National  Parts 
Show,  June  8-11.  The  Eadio  Manu- 
facturers Association  will  have  its  an- 
nual convention  June  7-8,  closing 
with  the  annual  industry  banquet  the 
evening  of  the  8th.  Meeting  of  the 
Eadio  Servicemen's  Association  will 
be  held  daily,  during  the  period  of 
the  Parts  Show.  The  Sales  Managers 
Club  meets  June  9,  and  "The  Bepre- 
sentatives"  get  together  the  same  day. 
The  annual  convention  of  the  Na- 
tional Association  of  Eadio  Parts  Dis- 
tributors is  scheduled  also  for  June  9. 


NY  SOLUTION  TO  TRADE-IN 
ALLOWANCES 

In  a  skillful  and  serious  effort  to 
make  the  1938-39  radio  season  a  dif- 
ferent and  a  more  profitable  one  in  the 
New  York  metropolitan  area,  organ- 
ized groups  of  dealers  have  huddled 
with  their  distributors,  and  a  new  at- 
titude toward  fair  trade  regulations  is 
the  result. 

The  main  features  of  the  plan  will 


A.  A.  Brandt,  adv.  supervisor,  E.  H.  Vogel,  manager  radio  division,  and  P.  F.  Had- 
lock,  commercial  engineer,  demonstrate  new  GE  Radios  before  Bridgeport  meeting 

May  18. 


John  F.  Ditzell,  Stewart- Warner  sales 
manager,  who  introduced  new  lines  at 
Chicago    convention    May    31-June    1. 


be  that  net  selling  prices  on  each 
model  will  be  definitely  fixed,  and 
there  will  be  a  special  agency  set  up 
to  enforce  this  price.  These  two 
points  were  found  to  be  popular  with 
dealers  in  the  area  when  their  ideas 
were  sampled  by  Percy  Peters,  chair- 
man of  the  radio  committee  of  the 
Electric  Appliance  Dealers  Associa- 
tion of  Brooklyn.  Other  regulations 
requested  by  the  dealers  included  elim- 
ination of  trans-shipping,  a  commit- 
tee of  dealers  to  pass  on  fair  trade 
contracts  offered  by  jobbers,  special 
cooperative  action  with  financing 
agencies  on  lines  not  having  price 
protection,  more  franchise  control,  a 
30-day  notice  on  price  changes,  price 
advertising  limited  to  list  figures,  and 
post-season  models  to  be  covered  by 
identical  price  regulations. 

Half   a    dozen   leading   distributors 


10 


Radio  Today 


readily  agreed  to  the  essentials  of  the 
plan.  Stromberg-Carlson,  represented 
by  Ben  Gross,  says  that  no  change  in 
the  firm's  fair-trade  contracts  will  be 
necessary  to  meet  the  requests  of  the 
dealers.  General  Electric,  with  D.  W. 
May  as  spokesman,  announces  a  new 
contract,  incorporating  the  flat  maxi- 
mum allowance  feature,  and  continu- 
ing its  policy  of  orderly  marketing  in 
general. 

MORE  DIALS  THAN  DOORS 

*  For  those  enlightened  persons 
who  have  been  interested  in  the  sec- 
ond and  third  set  idea  as  a  likely 
trend  in  the  American  home,  this 
item  is  plastered  over  some  other 
radio  news. 

In  the  small  town  of  East  Rocka- 
way,  Long  Island,  N.  Y.,  the  police 
department  made  a  survey  of  radio 
ownership  and  found  more  sets  than 


E.  A.  Tracey  of  Zenith  took  leading 

part   in   the   firm's   lively   showing    of 

1939  models,   early  last  month. 


families.  There  were  1,960  radios 
among  the  1,587  families  in  town. 
There  were  also  revealed  1,509  autos 
in  the  place,  but  only  211  car-radios. 

PHILGO  ADDS 
AIR-CONDITIONING 

Philco  Radio  &  Television  Corpora- 
tion is  invading  the  air-conditioning 
field  with  a  bang.  Larry  E.  Gubb, 
president  of  the  Philco  company,  an- 
nounces in  an  exclusive  interview 
with  Radio  Today. 

Philco  is  entering  the  air-condi- 
tioning field  on  a  mass-production 
basis,  declared  Mr.  Gubb.  Its  product 
is  a  portable  air-conditioning  unit 
called  "Cool-wave"  which  can  be 
placed  in  any  room  of  a  home,  in  of- 
fices, hospitals  or  hotels. 

Production  has  already  been  started 
on  this  new  air-conditioner  (for  de- 
tails see  page  68)  and  a  national  pro- 
motion campaign  has  been  planned 
for  its  introduction  to  the  public. 


RCA  launches  a  banner  line  at  Atlantic  City — left  to  right,  H.  C.  Bonfig,  David 

Sarnoff,  who  addressed  the  500  guests  personally;  Robert  Shannon,  and  jobber 

Elmer  Hamburg. 


SURVEY  OF  BUSINESS  TRENDS 

*  At  the  close  of  1937,  the  aver- 
age radio  store  inventory  was  6.3  per 
cent  of  the  sales  for  the  year,  while 
receivables  amounted  to  2.2  per  cent, 
among  the  48  radio  concerns  who  have 
so  far  reported  figures  in  Dun  & 
Bradstreet's  1935-37  Survey  of  Busi- 
ness Trends.  Radio  stores  are  listed 
in  the  "Furniture  and  House  Fur- 
nishings" group,  and  other  finding's 
in  that  classification  are  presented 
for  comparison : 

Sales  show  an  increase  in  1937  of 
only  1  per  cent  over  1936  as  compared 
with  a  30  per  cent  increase  between 
1935  and  1936.  Inventories,  on  the 
other  hand,  increased  24  per  cent  be- 
tween 1936  and  1937,  but  only  19  per 
cent  during  the  previous  year.  Re- 
ceivables followed  the  behavior  of 
sales,  increasing  10  per  cent  between 


1936   and  1937   as  compared   with  41 
per  cent  in  the  1935-36  period. 


Electric 

House 

House- 

Fur- 

Furni- 

hold Ap- 

nish- 

All Re- 

Radio 

ture 

pliances 

ings 

tailing 

Reporting   Concerns 

Number 

48 

383 

133 

124 

10.312 

1935  Sales 

($000,000) 

1 

22 

4 

4 

2,070 

1937    Ratios 

of  Sales  to 

Inventories 

6.3 

4.4 

7.1 

4.2 

Receivables 

2.2 

2.4 

6.3 

3.6 

Percentage   Increases 

and    Decreases 

1935  to  1936 

Sales 

30 

24 

29 

16 

16 

Inventories 

19 

17 

28 

13 

10 

Receivables 

41 

16 

20 

4 

11 

1936  to  1937 

Sales 

1 

S 

17 

11 

8 

Inventories 

24 

5 

31 

14 

11 

Receivables 

10 

S 

12 

7 

8 

1935  to  1937 

Sales 

32 

34 

51 

28 

25 

Inventories 

47 

23 

69 

30 

22 

Receivables 

56 

26 

35 

12 

20 

Note:  Inventories  and  receivables  are  at  the  close 
of  the  years.  The  ratios  of  sales  to  inventories  and 
sales  to  receivables  are  shown  only  to  indicate  the 
relative  importance  of  investments  in  stocks  and  out- 
standing receivables  relative  to  sales  in  the  case  of 
the  reporting  concerns.  These  ratios  are  not  neces- 
sarily reliable  guides  to  desirable  financial  ratios  be- 
cause of  the  wide  range  of  types  of  concerns  falling; 
within  single  classifications. 


Industry  showmen,  all  moguls  of  the  Chicago  Parts  Show.  Director  Ken  Hatha- 
way has  the  pencil;  left  to  right,  Arthur  Berard,  Arthur  Moss,  K.  C.  Prince,  H. 
E.  Osmun,  S.  N.  Shure. 


June,  1938 


11 


THE  1938-1939  RADIOS 

High  spots  of  principal  new  lines  as  thus  far  announced 
Mystery    control/  new  antennas,  phonograph  novelties 


// 


New  features — and  new  values  for 
the  listener — mark  the  new  1938-39 
radio  sets  now  corning  onto  the  mar- 
ket. Many  of  the  new  models  exhibit 
improvements  along  lines  already 
pretty  well  standardized.  Thus  push- 
button tuning,  introduced  a  year  ago, 
has  seemingly  become  nearly  uni- 
versal for  the  new  season.  In  the 
higher  priced  brackets  a  number  of 
striking  new  novelties  are  offered. 
But  for  the  great  bulk  of  the  models 
revealed  so  far,  the  principal  changes 
are  in  refinements  and  in  price  adjust- 
ments which  will  make  these  1939 
radios  the  "best  buys"  ever! 

Most  manufacturers'  lines  for  the 
new  season  appear  to  be  somewhat 
shorter  than  heretofore,  concentrating 
on  fewer  models  compared  with  a 
year  ago,  but  spanning  the  various 
price  ranges  in  a  way  to  reduce  in- 
ventory, without  limiting  the  pur- 
chaser's choice  of  selection  of  fea- 
tures. 

Prices  down 

Although  the  price  level  has  moved 
downward,  reflecting  both  economies 
of  production  and  a  greater  propor- 
tion of  smaller  sets  and  table  models, 
there  are  still  a  number  of  fine  con- 
soles and  combinations  offered  in  the 
"above  $100"  brackets  already  released 
by  leading  manufacturers,  indicating 


Philco's  "mystery  control".  This  little 
box  weighs  2  pounds,  works  like  a 
telephone  dial,  can  be  carried  any- 
where around  house.  No  wires,  no 
connections. 

that  radio  designers  and  makers  rec- 
ognize the  importance  of  a  continuing 
market  for  fine  quality  and  fine  tone. 
In  fact  at  several  manufacturers' 
showings,  sales  managers  emphasized 
to  their  distributors  that  the  continu- 
ing prosperity  of  both  jobber  and 
dealer  depended  on  selling  a  fair  pro- 
portion of  higher  priced  sets  during 
1938-39. 

Meanwhile  the  new  local-station 
high-fidelity  sets,  capable  of  receiving 
only  nearby  programs,  are  being  given 
attention    by    several    manufacturers, 


Giant  demonstrating  model  of  GE  Radio's  "Time-tuning"  control.     Any  of  five 

stations  can  be  pre-set  to  be  tuned-in  automatically  for  any  15-minute  period  in 

the  next  24  hours. 


and  new  models  are  being  made  ready 
for  the  market. 

Combinations  will  have  a  more  ac- 
tive play  this  year  than  ever  before. 
It  is  reasoned  that  purchasers  looking 
around  to  buy  sets  above  the  medium- 
priced  range  will  need  some  special 
inducement  such  as  a  combination 
phonograph-radio,  and  therefore  the 
combination  market  is  expected  to 
boom  in  the  1938  models.  Already 
records  are  selling  at  a  new  high  in 
volume,  reminiscent  of  the  old  phono- 
graph days,  thanks  to  the  public's  re- 
awakening to  phonograph  convenience 
and  the  trade's  provision  of  record- 
playing  attachments. 

RCA  Victor  has  combination 
phonograph-radio  units  (which  it  now 
calls  "Victrolas")  selling  as  high  as 
$260.  A  new  record-changing  mechan- 
ism developed  at  Camden  feeds  the 
records  from  above  the  playing  posi- 
tion, the  pile  of  records  being  carried 
above  the  pickup  arm,  and  fed  down, 
one  by  one,  to  the  turntable  as  the 
pickup  arm  is  .momentarily  swung  out 
of  the  way.  In  this  new  pickup,  also, 
the  needles  are  conveniently  loaded 
from  the  top.  Philco  has  a  record 
"repeater"  which  repeats  by  lifting 
the  lid  of  the  phonograph  compart- 
ment. 

Push-buttons 

Push-button  tuning  seems  to  be 
widely  applied  in  the  new  1938  radio 
lines  soon  to  be  announced.  Such 
push-button  control  is  of  four  kinds : 
(1)  motor-driven,  (2)  pre-set  circuits 
employing  trimmer  condensers,  (3) 
pre-set  circuits  using  iron-core  in- 
ductance tuning,  and  (4)  lever-type 
tuning,  in  which  the  control  lever 
must  be  pushed  "clear  down"  to  a 
fixed  stop.  In  the  new  circuits  iron- 
core  or  permeability  tuning  is  becom- 
ing increasingly  important,  and  al- 
ready occupies  a  prominent  position. 

Technical  advances  have  been  made 
in  the  push-button  trimmer  tuning 
circuits  which  now  make  automatic 
frequency  control  unnecessary.  Oscil- 
lator circuits  are  being  stabilized  with 
iron-core  or  permeability-tuned  ciols. 
Silvered  mica  condensers  are  provid- 
ing a.  capacity  which  is  extremely 
stable  under  all  circumstances.    Tern- 


12 


Radio  Today 


NEW  LUXURY  MODELS 


Above— RCA  Victor  HF6.    14-tube  high-fidelity.    7  bands. 
Upper  right — Philco  45XX.    Eight  push-buttons.    Manual. 
Right,  center — General  Electric,  keyboard  tuning. 
Below,  left— Zenith  6S341.    6  tubes.    Tip-touch  tuning 
Below,  right— RCA  Victor  97  KG.   7  tubes.    Three  bands 


Beamoscope  antennas 


Greater  convenience,  handsomer  designs,  finer  cabinetry,  mark  the  1938-39 
models.     Push-button  tuning  is  now  pretty  universally  adopted,  with  provision 
for  as  many  stations  as  are  likely  to  be  tuned  in.    For  the 
purchaser  who  wants  a  quality  set,  with  full  tonal  response, 
there  is  wide  selection  to  be  had  in  the  upper  price  brackets. 


^^***-*-'^*';  ^te   '\ 


Knight-Allied.     Three-band.     Slide-rule  dial.       Sonora  C  22.     Plastic.     Ivory,  walnut,  black. 


Philco  30  T.   6  tubes.    8  push-buttons.   $55. 


perature  compensating  condensers  of 
numerous  designs  are  being  used  in 
many  sets  to  offset  shifts  in  frequency 
due  to  temperature. 

For  simplicity  in  station  set-up, 
two  and  three  stages  of  iron-core 
trimmer  circuits  are  ganged  to  a 
single  control  for  each  station,  instead 
of  having  a  separate  control  for  each 
tuned  stage. 

Stability,  speed 

Mechanical  levertype  tuning  sys- 
tems have  been  redesigned  and  are  now 
extremely  simple.  This  type  of  tun- 
ing, though  more  commonly  used  with 
a  condenser  gang,  is  also  suitable  for 
use  with  iron-core  tuning.  In  this 
latter  application,  the  mechanism 
controls  the  movement  of  iron  cores 
in  the  coil  system,  thus  doing  away 
with  the  conventional  variable  con- 
denser. 

Motor-driven  push-button  systems 
have  been  speeded  up  so  that  only  a 
second  or  so  is  required  for  a  full 
180°  condenser  travel.  Also  the 
mechanisms  themselves  have  been 
simplified  and  made  more  fool-proof. 
"Homing"  type  mechanisms,  where 
the  device  tunes  directly  to  the  de- 
sired station,  are  being  widely  used. 
Mechanically   the   devices   have   been 


made  accurate,  eliminating  the  need 
of  AFC. 

Departing  from  the  usual  push-but- 
ton arrangement,  GE  provides  a  series 
of  keys  arranged  like  a  piano  keyboard 
(but  of  dark  cabinet  finish)  along  the 
upper  front  edge  of  its  higher  priced 
sets.  These  station  keys  can  be 
reached  conveniently  from  either  a 
sitting  or  standing  position. 

"Mystery"  control 

Keen  trade  interest  has  centered 
around  the  new  "mystery  control"  an- 
nounced by  Philco.  With  this  wire- 
less remote  control,  the  radio  set  can 
be  tuned  m  on  any  of  eight  sta- 
tions, volume  can  be  controlled  or  the 
set  turned  off,  from  any  point  in  the 
house,  upstairs  or  down.  The  control 
operates  without  wires,  plug-ins  or 
connections  of  any  kind.  The  con- 
trol element  is  a  compact  box,  appar- 
ently battery-energized,  which  can  be 
carried  about  anywhere.  Each  con- 
trol box  is  tuned  to  its  own  radio  so 
there  is  no  possibility  of  one  control 
box  operating  a  neighbor's  set.  The 
box  is  fingered  like  a  telephone  dial, 
sending  out  a  succession  of  radio  im- 
pulses which  actuates  the  receiver 
tuning  mechanism.  To  up  volume, 
the    "louder"   position   is   dialed,   and 


the  volume  continues  to  increase  until 
stopped  by  again  dialing.  Volume 
reduction  is  accomplished  in  the  same 
way,  with  the  additional  feature  that 
if  continued  unchecked,  the  set  auto- 
matically turns  itself  off.  It  cannot 
be  turned  on  again,  however,  except 
by  hand. 

Time  tuning 

Pre-set  tuning  or  timing  of  future 
programs  desired  is  provided  for  in 
several  new  higher-priced  units.  One 
of  the  most  elaborate  of  these  mech- 
anisms, GE's  "station  preselector,"  is 
shown  in  an  accompanying  picture, 
and  arranges  for  automatically  tuning 
in  any  one  of  five  stations  for  any 
quarter-hour  period  during  the  en- 
suing 24  hours  from  the  time  of  set- 
ting up  the  levers. 

New  antenna  arrangements  and  in- 
terference eliminators  characterize  a 
number  of  the  new  lines.  Thus  all 
new  RCA  models  of  eight  tubes  and 
up  include  the  new  "master  noise 
eliminator"  which  permits  antenna 
and  set  to  be  adjusted  for  minimum 
interference  for  its  location. 

A  shielded  loop  antenna  called  a 
"beam-scope"  is  provided  inside  the 
cabinets  of  certain  GE  models,  mak- 
ing them  self  contained  and  independ- 
ent of  outside  areal  or  ground.     The 


RCA  9-tube  99T.  8  stations,  3  bands. 


9.95. 


Philco  35XX.    8  push-buttons,  illuminated. 


Zenith  6S362.  9  tubes.  Tiptouch  tuning.  $89.95 


Admiral  S16-5C.    AC-DC.     Ivory  or  walnut.        Fada   30J.     Two    bands.      Golden-Glo    dial. 


Fada  Silent  radio  S-46-G.     Mystic  ear. 

tuned  loop  is  rotated  inside  a  eopper- 
mesh  cage,  and  is  set  in  the  maximum 
position  for  the  location.  The  cage 
shield,  it  is  explained,  intercepts 
static  from  nearby  interference,  while 
the  magnetic  impulses  from  broadcast 
stations  pass  unimpeded  through  the 
copper  shield  to  be  picked  up  by  the 
loop. 

Meanwhile  Philco  introduces  a  new 
vertical  steel  rod  aerial  which  rises 
as  high  as  12  feet  and  can  be  installed 
without  wires,  supports  or  tools. 

Twisted  pair  lead-ins,  with  one  wire 
connecting  with  a  simple  antenna 
(the  other  wire  serving  to  neutralize 
the  nearby  interference  picked  up  by 


Admiral  125-5E.     Ivory  or  colored  bakelite. 

the  first  wire),  are  another  develop- 
ment of  the  1938-39  season. 

Arm-chair  radios  are  in  evidence  in 
the  1939  lines,  although  probably  less 
in  number  than  a  year  ago.  The  larg- 
est number  noted  in  any  lines  so  far 
announced  is  five;  another  has  three, 
including  one  combination  unit;  a 
third  line  has  no   arm-chair  models. 

The  present  season  may  mark  a 
transition  year  for  short-wave  or  all- 
wave  radio.  Certainly  the  number  of 
short  wave  bands  provided  has  been 
considerably  curtailed,  looking  over 
the  new  models  as  a  whole,  and  some 
sales  managers  have  even  advised 
their  distributors  that  "short  wave  is 


Emerson  AX217  Little  Miracle.    $14.95. 


Andrea   2-E-6.     6   push  buttons.     3   bands. 

on  the  way  out." 

Early  emphasis  is  put  on  new  farm 
radios,  and  particularly  on  improve- 
ments which  make  for  decreased  bat- 
tery current  consumption.  These  sets 
are  available  in  both  6-volt  and  2-volt 
lines,  and  several  have  cut-over  pro- 
visions for  operation  on  110  volts 
alternating  current,  useful  when  an 
isolated  farm  later  gets  "high-line" 
service. 

Auto  radios  show  the  same  trend 
toward  push-button  tuning  as  home 
sets.  Greater  values  are  available  for 
the  same  price  levels  and  the  lower 
brackets  continue  to  creep  downward 
in  initial  cost. 


Philco  17T.     Six  buttons.     $29.95. 
Detrola,  Jr.    Model  216.    AC-DC.  $10. 


RCA  Victor  96T.     Six  buttons.     $34.95. 
Emerson  AX  212.     AC-DC.     $19.95. 


Sonora  C66.    Three  bands.     Slide-rule  dial. 
Zenith  5R312.     Brown  Bakelite.     $19.95. 


"Ill" 


GETTING  THE  MONEY  IN 

Collections  continue  problem  for  parts  jobber 
Co-operative    credit    information    important 


"Service  man  credit  is  a  touchy 
proposition,"  sighs  a  parts  jobber  torn 
at  the  present  moment  between  the 
need  to  make  more  sales  and  the 
sterner  necessity  of  collecting  money 
for  sales  already  made.  "The  jobber 
who  can  handle  his  credit  problem 
best  is  the  fellow  who  can  make  it 
his  business  to  become  better  ac- 
quainted with  Tiis  customers,  both 
in  and  out  of  their  shops." 

Being  of  a  philosophic  turn  of 
mind,  this  jobber  executive  has  the 
following  to  say  of  the  average  serv- 
ice man: 

"Engaged  in  an  enterprise  so  full 
of  its  own  peculiarities ;  one  which 
would  seem  to  require  all  at  once  a 
psychiatrist's  insight  into  human  be- 
havior; the  level  head  of  an  execu- 
tive; a  salesman's  temperament;  Dale 
Carnegie's  personality;  an  engineer's 
mind;  a  doctor's  hours  and  a  truck 
driver's  stamina,  the  remarkable 
thing  is  that  any  of  these  service  men, 
tackling  it  single-handed,  are  able  to 
make  as  much  of  a  success  of  it  as 
they  do." 

Conditions  tighten 

"The  condition  of  the  radio  serv- 
ice men  in  our  locality  is  the  lowest 
ever,"  complains  an  Eastern  parts  dis- 
tributor. "Ones  that  have  always  paid 
promptly  are  sixty  to  ninety  days 
behind  and  getting  worse.  We  are 
taking  steps  to  collect  old  accounts, 
but  the  universal  cry  is  that  these 
service  men  are  operating  at  a  loss. 
We  are  very  particular  about  who  we 
give  credit  to  and  we  have  stopped 
everyone  except  the  gilt-edged  ac- 
counts. We  find  that  the  individual 
service  man  is  hopelessly  in  debt.  In 
the  last  few  months  credit  conditions 
have  become  extremely  bad." 

"We  select  our  accounts  on  the 
basis  of  loyalty  to  our  concern,"  ex- 
plains another  distributor.  "This, 
with  ability  to  pay.  and  potential 
profiitable  volume,  constitutes  the 
one-two-three  of  our  requirements. 
Accounts  selected  in  this  way  are  now 
paying  within  30  to  60  days,  and  the 
bad-debt  proportion  in  this  group  is 
negligible.  W&  depend  upon  refer- 
ences and  salesmen's  contacts,  and  we 
watch  very  closely  all  cases  where 
any  doubt  arises." 

"We  ask  for  trade  references,"  de- 


clares another  successful  parts  job- 
ber, "and  then  we  allow  limited  open 
account  ($10  to  $15,  maximum)  and 
see  how  they  pay.  We  are  successful 
in  collecting  most  of  the  amount  due 
us,  by  keeping  after  them  in  a  nice 
way." 

Stock  or  cash 

"Unless  the  service  man  or  dealer 
has  a  store  and  some  stock  on  hand, 
we  demand  cash,"  reports  an  up-state 
distributor.  "As  the  result,  most  of 
them  pay  cash,  and  some  run  their 
accounts  for  60  days.  We  are  tighten- 
ing our  credit  terms,  for  we  find  that 
service  men  are  falling  further  be- 
hind than  formerly." 

"We  use  regular  credit  channels, 
but  are  especially  successful  with 
Dunn's  form  No.  82,"  reads  a  report 
from  New  England.  "Some  of  our 
service  men's  accounts  are  slower 
than  ever,  but  these  are  only  a  few 
— the  rest  are  better  than  before.  We 
select  our  accounts  on  the  basis  of 
moral  risk,  and  ability  in  service 
work.  We  started  tightening  even  as 
far  back  as  last  October,  and  are 
tightening   again." 


PARTS  JOBBER  METHODS  FOR 
IMPROVING  COLLECTIONS 

Careful  training  of  radio  servicemen  to 
be  thoughtful  buyers  and  bookkeepers 
as  well  as  mechanics. 

More  attention  to  new  products  in  the 
service  h'eld  which  may  be  tonic  to  the 
serviceman's  income. 

Personal  support  for  the  promotion 
plans  undertaken  by  accounts. 

Exchange  of  credit  notes  and  methods 
among  fellow  jobbers. 

Extension  of  limited  credit  as  a 
preliminary  test  of  good  will  and 
ability  to  pay. 

Constant  sales  contact  with  accounts, 
even  during  periods  of  inactivity. 


A  distributor  in  New  York  basea 
his  whole  credit  procedure  on  regu- 
lar interviews  with  hia  accounts.  He 
is  willing  to  give  each  of  his  custom- 
ers the  business  benefit  of  his  experi- 
ence among  a  large  group  of  service- 
men, and  offers  them  aid  and  advice 
— at  the  same  time  getting  a  full 
statement  as  to  what  ails  the  particu- 
lar business  and  what  the  customer 
intends  to  do  about  it.  In  judging 
credit  risks,  this  jobber  considers  first 
of  all  character  and  references. 

At  still  another  distributing  cen- 
ter, the  wholesaler  is  strong  on  bank 
references.  He  investigates  the  neigh- 
borhood in  which  the  applicant  is 
located,  notes  the  store  investment 
and  the  amount  of  equipment.  He 
talks  to  those  who  have  known  the 
serviceman  for  a  long  time,  and 
takes  tips  from  credit  associations  on 
what  to  look  for  in  good  local  credit 
risks. 

He  believes  the  radio  service  busi- 
ness to  be  a  substantial  one,  and  is 
willing  to  take  chances  on  its  future, 
even  during  a  recession. 

BOSTON  JOBBERS  DISCUSS 
CREDITS  AND  COLLECTIONS 

*  Credit  matters  were  the  chief 
topic  before  the  Boston  jobbers  group's 
Spring  meeting,  held  at  739  Boylston 
Street,  Boston,  and  presided  over  by 
Joseph  A.  Demambro,  of  the  Radio 
Transformer  Co.,  Boston.  Radio  job- 
bers from  Worcester  and  Brovidence 
were  also  present. 

Blans  were  formulated  to  submit  a 
system  whereby  a  jobber  having  an 
account  which  is  sixty  days  past  due 
would  without  any  option  be  obliged 
to  report  it  to  the  secretary  of  the 
New  England  Group  who  in  turn 
would  place  the  reported  name  on  a 
monthly  report  sent  to  all  jobbers. 
This  would  afford  simply  protection 
for  all  jobbers.  Moreover,  the  object 
would  be  accomplished  without  re- 
vealing to  the  group  the  name  of  the 
person  or  company  reporting  the  past 
due  account. 

In  connection  with  the  credit  plan 
a  letter  from  S.  G.  Hagin  of  the  Na- 
tional Association  was  introduced  de- 
scribing a  plan  developed  in  coopera- 
tion with  the  Radio  Barts  Jobbers  of 
the  Bacific  Northwest. 

Northwest  plan 

This  plan  has  been  devised  to  aid  in 
making  the  trade  safe  for  legitimate 
and  permanent  customers,  as  well  as 
to  eliminate  losses  to  the  supply  trade. 

On  such  accounts  as  the  wholesaler 
grants  monthly  terms  and  the  eustom- 
(Oontinued  on  page  62) 


16 


Radio  Today 


T*    1  'It 


RADIO  LISTENERS  OF 
THE  U.S.A. 

The  48  states  are  shown  in 
relative  size,  according  to 
number  of  homes  with  radios. 

Copyright  by  Radio  Today 


26,666,500  RADIO  FAMILIES 

American  firesides  having  radio  sets            Total   radio  families   added   up   to  that  82  per  cent  of  all  U.  S.  homes 

have  been  counted  all  over  again  by        26,666,500,  an  increase  of  17  per  cent  now  have  receivers.     With  "second" 

the  Joint   Committee  on  Radio  Re-        over  the  committee's  1936  estimate  of  and  extra  sets  and  auto  radios,  this 

search.                                                               22,869,000.     The  new  total  indicates  brings  U.S.  total  sets  above  36,000,000 1 


STATE 


RADIO 
OWNERSHIP 

% 


California 95 

Nevada 95 

Oregon 95 

Washington ....  95 

New  Jersey ....  93 

New  York 93 

Connecticut ....  92 

Massachusetts. .  .  92 

Michigan 92 

New  Hampshire.  92 

Ohio 

Rhode  Island  .  .  . 

Dist.  of  Col 

Maine 


92 
92 
91 
91 
90 
90 
90 


Illinois 

Pennsylvania  . 

Utah 

Vermont 90 

Indiana 87 

Maryland 87 

Delaware 86 

Iowa 85 

Minnesota 85 

West  Virginia. .  .  84 

June,  1938 


TOTAL 
FAMILIES 

1 ,81 8,000 

30,000 

299,000 

468,000 

1 ,098,000 

3,372,000 

437,000 

1,104,000 

1 ,220,000 

1 36,000 

1,777,000 

169,000 

168,000 

221 ,000 

2,063,000 

2,452,000 

123,000 

99,000 

934,000 

410,000 

67,000 

680,000 

652,000 

41 7,000 


1938 

RADIO 

FAMILIES 

1,719,800 

28,500 

285,400 

443,300 

1,022,500 

3,132,300 

402,1 00 

1,019,200 

1 ,1 22,200 

1 24,400 

1,641,500 

155,500 

1  52,900 

201,100 

1,857,100 

2,206,400 

1 1 1 ,000 

88,600 

816,800 

355,100 

57,600 

577,800 

556,900 

348,300 


Wisconsin  .  .  .  . 

Colorado 

Montana 

Nebraska 

Idaho 

South  Dakota . 

Wyoming 

Arizona 

Missouri 

North  Dakota. 

Kansas 

Oklahoma 

Kentucky 

Texas 

Florida 

Tennessee 

Virginia 

New  Mexico 

Louisiana 

Alabama 

North  Carolina 

Georgia 

Arkansas 

South  Carolina 
Mississippi 


83 

81 
81 
81 
80 
80 
80 
77 
77 
77 
73 
73 
70 
68 
67 
67 
65 
61 
58 
56 
55 
52 
51 
51 
42 


735,000 
288,000 
142,000 
352,000 
124,000 
167,000 
62,000 
104,000 
,072,000 
1 56,000 
501 ,000 
619,000 
708,000 
,516,000 
443,000 
689,000 
61 3,000 
102,000 
510,000 
670,000 
736,000 
716,000 
501 ,000 
407,000 
494,000 


612,700 
233,500 
114,600 
284,100 

98,700 
132,900 

49,800 

79,600 
822,800 
119,600 
367,800 
454,300 
494,900 
1,033,500 
297,900 
459,900 
400,200 

62,300 
297,400 
375,200 
408,600 
370,800 
254,800 
207,300 
207,000 


Total 82  32,641,000  26,666,500 


17 


CORKSCREW   BUYING 


One  manufacturer  told  his  distributors  last  month: 
"Our  prices  are  low  because  we  put  the  screws  on  our 
suppliers — we  forced  their  bids  down  to  the  last  penny.. 
and  then  some.  They  were  helpless.  So  we  won.  And 
you  win." 

Of  course  such  talk  is  nothing  new  in  radio.  Other  man- 
ufacturers have  long  used  similar  tactics.  Other  buyers 
have  "won"  by  the  same  demands.  All  over  the  radio  in- 
dustry prices  have  been  chiseled,  whittled  and  gouged, 
until  business  has  become  precarious  for  all  concerned, 
and  every  order  constitutes  a  hazard. 

Who  wins? 

But  did  that  manufacturer  "win"? 

Did  his  distributors  win? 

Did  anybody  win  as  the  result  of  this  practice?  Does 
anybody  win,  when  the  whole  result  of  such  evil  business 
policies  is  to  wreck  price  schedules,  demoralize  sales,  grind 
down  wages,  curtail  employment,  spread  losses,  and  check 
purchasing  power  ? 

For  "corkscrew  buying" — as  some  call  it — demoralizes 
all  who  come  in  contact  with  it.  It  is  as  crooked  as  the 
twisted  implement  that  gives  it  name.     Its   sharp  barb 


bites  in  every  direction.  It  achieves  its  ends  by  gouging 
and  by  pressure.  Like  some  deadly  coiled  snake,  it  is  a 
menace  to  all  in  radio. 

Great  products,  great  lines  of  merchandise,  in  other 
fields  have  been  built  on  the  quality  and  value  wrought 
into  every  constituent  part.  Nowhere  are  quality  parts 
more  important  than  in  radio. 

Everybody  loses 

When  chiseling  and  corkscrewing  start,  value  must  be 
cut  along  with  price.  Gypping  follows,  and  that  gypping 
is  suffered  and  participated  in  all  along  the  line — by  manu- 
facturer, distributor  and  dealer. 

When  the  buyer  "puts  the  screws  on"  the  supplier,  en- 
gineering service  is  sacrificed  and  the  product  is  trimmed. 
The  engineering  staff  suffers,  and  so  do  the  production 
employees.  Discounts  are  whittled,  and  distributors  and 
dealers  lose  income.  Earnings  and  purchasing  power  are 
sacrificed  all  along  the  line.  Meanwhile  the  public  loses 
the  benefit  of  engineering  skill  and  design  in  the  products 
it  buys. 

When  "the  screws  are  put  on"  and  corkscrew  buying 
follows,  the  public  is  the  final  victim. 


18 


Radio  Today 


THE  KEY  TO  RADIO  PARTS  CITY 


Exhibition  streets  at  the  Parts  Show  are  lined  by  130  manufac- 
turers.  People  and  products  at  Hotel  Stevens,  Chicago,  June  8-11 


Here  we  go,  from  booth  to  nifty 
booth  among  the  exhibitors  at  the  ra- 
dio parts  event  of  the  year: 

Aerovox  Corp. — Charles  Golenpaul, 
S.  I.  Cole,  J.  A.  Simberkoff,  F.  R. 
Ellinger.  C.  H.  Dolfuss,  Jr.,  J.  P. 
Kay,  J.  W.  Beneke,  W.  C.  Hitt,  H. 
Parke,  M.  K.  Franklin,  H.  Gerber, 
J.  J.  Backer,  B.  Murphy,  J.  J.  Cota, 
F.  J.  Stevens,  G.  G.  Willison,  C. 
Heiner,  H.  Meinhard — dry  and  wet 
electrolytic  condenser,  paper,  mica, 
auto  radio,  transmitting  exact  du- 
plicates, fixed  mica,  padder  con- 
densers, condenser  bridge,  inter- 
ference filters,  motor  capacitors, 
capacitor  analyzer,  carbon,  insu- 
lated, vitreous  enamel  fixed,  and 
adjustable  resistors. 

Booth  206  Coulomb  St. 

Alliance  Mfg.  Co. — R.  F.  Doyle,  E.  V. 
Schneider,  Edward  Singer  —  elec- 
tric tuning  motors,  electric  turn- 
table motors. 

Booth  217A  Franklin  Ave. 

Alpha  Wire  Corp. — Peter  Bercoe,  A. 
E.  Bernardik,  C.  F.  Barner,  Harry 
Gerber,  L.  E.  Jaques,  Ted  Keller, 
James  Millar,  H.  B.  Parke,  H.  A. 
Roes,  J.  Earl  Smith,  B.  L.  Mac- 
Pherson,  Francis  Harvey,  Martin 
Friedman  —  wire,  wire  products, 
aerial  kits  and  aerial  accessories. 

Booth  211  Faraday  Ave. 

American    Condenser    Corp.  —  Irving 

Menschik,   R.   Lew,   Raymond   Las- 

coe,  Sidney  Fishberg — condensers. 

Booth  213  Marconi  Blvd. 

American    Microphone    Co.  —  A.    H. 

Bruning,  F.  A.  Yarbrough — micro- 
phones and   accessories. 

Booth  211 A  Bell  St. 


Perry  Saftler,  president  of  "The  Rep- 
resentatives," whose  big  meeting  is 
June  9.  He  was  also  the  man  at  the 
throttle  on  the  Radio  Special  train 
from  New  York  City. 


American  Phenolic  Corp. — Arthur  J. 
Schmitt,  Henry  J.  Hohn,  Edwin 
Mraz,  A.  H  Peterson,  D.  R.  Bittan, 
J.  R.  Longstaffe,  Harry  B.  Segar, 
G.  O.  Tanner,  F.  R.  Ellinger,  Ar- 
thur H.  Baier — radio  tube  sockets, 
plugs  and  connectors. 

Booth  204  Steinmetz  Ave. 

American  Radio  Hardware  Co.,  Inc. — 

D.  T.  Mitchell,  H.  H.  Smith,  M.  J. 
Stessin  —  complete  line  of  radio 
hardware,  transmitting  accessories 
and  tools  for  servicemen. 

Booth  208  Coulomb   St. 

American   Television   &  Radio   Co. — 

Albert  Goffstein,  J.  M.  Cartwright, 
Frank  A.  Emmet,  Ted  Keller,  Wil- 
liam F.  Kelly,  E.  H.  Lewis,  J.  V. 
Costello,  M.  A.  Sachs,  Edward 
Singer,  George  D  Norris,  J.  Earl 
Smith,  Morris  F.  Taylor,  Elmer  W. 
Oszman,  Thomas  T.  Scott,  B.  L. 
MacPherson — vibrators,  DC-AC  in- 
verters, battery  chargers,  "A"  elim- 
inators, power  supplies. 

Booth  217  Henry  Ave. 

Amperev     Electronic     Products  —  S. 

Norris,  C.  R.  Strassner,  William 
Ellinger  —  air-cooled  transmitting 
tubes,  mercury  vapor  rectifiers, 
water-cooled  transmitting  tubes. 

Booth   213   Bell    St. 

Amperite  Co. — A.  G.  Ostrand  and 
William  Ruttenberg — microphones, 
Kontak  microphone,  stands,  regu- 
lators  Booth  210  Hertz  Ave. 

Arcturus  Radio  Tube  Co. — A.  E.  Cerf , 
W.  J.  Johnston,  G.  D.  Norris,  H.  E. 
Erickson,  J.  Schoonmaker,  M.  D. 
Ealy,  R.  S.  Diethert,  A.  C.  Leon- 
ard, J.  Geartner,  F.  P.  Benson,  J. 
A.  Stobbe,  J.  Millar,  G.  G.  Moss — ■ 
radio  tubes. 

Booth  202  Steinmetz  Ave. 

Astatic  Microphone   Laboratory,   Inc. 

— F.  H.  Woodworth,  R.  T.  Schot- 
tenberg,  J.  Walter  Berggren  ■ — 
crystal  microphones,  crystal  pick- 
ups and  accessories. 

Booth   216  Henry  Ave. 

Atlas  Sound  Corp. — R.  C.  Reinhardt, 
Carl  R.  Blumenthal,  Royal  A. 
Stemm  and  Jr.,  James  P.  Kay, 
Arnold  A.  Sinai,  Ralph  C.  James, 
Jr.  —  public  address  horns  and 
speakers,  microphone  stands,  baf- 
fles and  enclosures. 

Booth  209  Franklin  Ave. 

Audak  Co.,  Inc. — Royal  Stemm,  Ed- 
ward Stemm,  George  V.  Smith, 
Maximilian  Weil — electrical  repro- 
ducing apparatus,  including  pick- 
ups and  cutting  heads. 

Booth  211  Franklin  Ave. 

Barker  &  Williamson — B.  R.  Barker, 
J.  F.  Williamson — turrets,  induc- 
tors, swinging  links,  ceramics  and 
accessories. 

Booth  212  Marconi  Blvd. 


Belden  Mfg.  Co. — Whipple  Jacobs, 
H.  W.  Clough,  H.  H.  Wermine, 
E.  K.  Butler — antenna  systems, 
hook-up  wires,  magnet  wires,  mul- 
tiple conductor  cable  and  micro- 
phone  cable. 

Booth  208-210  Marconi  Blvd. 

Bell  Sound  Systems,  Inc. — F.  W.  Bell, 
G.  P.  Williams,  R.  E.  Potts — com- 
plete sound  equipment  and  inter- 
communicating equipment. 

Booth  107  Marconi  Blvd. 

Birnbach  Radio  Co.,  Inc.  —  Morris 
Birnbach,  Samuel  Schaeffer,  Aaron 
Danziger,  Nathaniel  Jacoby,  Alfred 
Jacoby  —  aerials,  antenna  equip- 
ment and  accessories,  ceramic  in- 
sulators, cables  and  wires,  jacks, 
plugs,  sockets. 

Booth  217  Steinmetz  Ave. 

Bliley  Electric  Co. — F.  D.  Bliley  and 
G.  E.  Wright — crystals  and  mount- 
ings..  Booth  105  Bell   St. 

David  Bogen  Co.,  Inc. — Haskel  A. 
Blair,  Ralph  Ritter,  David  Bogen, 
H.  A.  Steinberg — public  address 
equipment,  intercommunication  sys- 
tems and  centralized  program  sys- 
tems .  .  .  Booth  206  Steinmetz  Ave. 

William  Brand  &  Co.  —  William 
Brand,  William  Naumburg,  Jr., 
Earl  W.  Brinson,  Frederick  Hall- 
mark— Turbo  oil  tubing,  saturated 
sleeving,  varnished  cloths,  papers 
and  tapes;  mica  plates,  mica  films. 
'  Booth  207  Bell  St. 

(To  next  page) 


President  Leslie  C  Rucker  of  the  Na- 
tional Assn.   of  Radio  Parts  Jobbers, 
has  snappy  plans  for  the  group's  con- 
vention on  June  9. 


June,  1938 


19 


Bruno  Laboratories,  Inc. — William  A. 
Bruno,  Paul  von  Kunits,  H.  Gross- 
man, L.  C.  McCarthy  —  velocity 
microphones,  both  type  Veletron 
microphones,  recorder  and  pickup, 
microphone  stands,  allied  equip- 
ment  Booth  213  Henry  Ave. 

Brush  Development  Co. — W.  H.  St 
Clair,  John  Altmayer,  M.  P.  Odell 
— sound  cell  microphones,  crystal 
headphones,  "Hushatones,"  speak- 
er-microphones, microphone  stands, 
vibration  pickups,  oscilloscope 
units Booth  216  Hertz  Ave. 

Bud  Radio,  Inc.  —  Max  L.  Haas, 
George  Grostick,  Nat  Spitz,  John 
Moran,  Maurice  Musler — transmit- 
ting and  receiving  variable  con- 
densers, chassis,  cabinets,  relay 
racks  and  panels,  dials,  insulators, 
coils,  other  amateur  radio  equip- 
ment. .  .  .Booth  212  Franklin  Ave. 

Allen  D.  Cardwell  Mfg.  Corp. — R.  L. 

Morehouse — fixed  and  variable  air 
and  oil  dielectric  capacitors  and 
radio  accessories. 

Booth  207  Marconi  Blvd. 

Carron  Mfg.  Co. — J.  Prince,  C.  S. 
Linell,  H.  A.  Howell — replacement 
cones,  etc. .  .  Booth  106  Coulomb  St. 

Centralab — H.  E.  Osmun,  W.  Fritz, 
T.  B.  Hunter,  Earl  Champion,  W. 
S.  Parsons — volume  controls,  fixed 
resistors,  ceramic  condensers, 
switches ..  Booth   114-116  Bell  St. 

Cinaudagraph  Corp.- — Sherman  Reese 
Hoyt,  D.  P.  O'Brien,  L.  B.  Corn- 
well,  H.  W.  Harwell — loudspeakers 
and  Nipermag  permanent  magnet 
alloy ....  Booth  214  Faraday  Ave. 

Clarostat  Mfg.  Co.,  Inc.  —  Victor 
Mucher,  Eddie  Trefz,  S.  Bialek, 
J.  M.  Cartwright,  L.  G.  Cushing, 
H.  Gawler,  H.  Gerber,  H  P.  Hag- 


gerty,  A.  D.  Leban,  L.  E.  Jacques, 
J.  Millar,  B.  L.  Moore,  G.  G.  Moss, 
G.  D.  Norris,  J.  O.  Olsen,  W.  I. 
Otis,  J.  J.  Perlmuth,  H.  A.  Roes, 
L.  C.  Shumac,  R.  Smith — volume 
controls,  resistors,  resistor  tubes, 
line  voltage  dropping  resistors. 

Booth  208  Steinmetz  Ave. 

CIough-Brengle  Co. — Kendall  Clough, 
Ralph  Brengle,  Fred  Wellman,  Eu- 
gene Carrington,  R.  O.  Lund,  W. 
Sorenson,  M.  Krasno,  H.  Cooper, 
J.  Wazny,  P.  D.  Terwilinger,  M.  A. 
Dobbin,  S.  Harper,  G.  W.  Sipe, 
P.  B.  Hill,  Mr.  Hedquist,  W.  Bert 
Knight,  R.  N.  Swanson,  A.  C.  Sim- 
monds,  E.  P.  Scott,  M.  B.  Patter- 
son, R.  Carson,  R.  T.  Perron,  R.  A. 
Adams,  M.  McMahon,  E.  L.  Hol- 
lingsworth,  L.  C.  Still — radio  ser- 
vicing and  test  instruments. 

Booth  106-108  Bell  St. 

Continental     Carbon,     Inc.  — -  G.     F. 

Benkelman,  W.  M.  Kohring,  W.  W. 
Boyd — carbon  and  wire-wound  re- 
sistors, suppressors,  noise  filters, 
paper  dielectric  condensers. 

Booth  115  Ampere  St. 

Continental  Diamond   Fibre  Co. — N. 

N.  Wright,  W.  R.  Yates,  Andrew  J. 
Fisher,  Alfred  G.  Rosnes,  C.  R. 
Jones,  H.  P.  Weldon,  William 
Weber,  Ed  Scheuer,  John  Eason, 
Robert  E.  Tappan,  Buddy  Gotshall 
— radio  sockets,  dials,  coil  forms, 
radio  insulation. 

Booth  209  Marconi  Blvd. 

Cornell-Dubilier  Corp. — L.  L.  Adel- 
man,  Octave  Blake,  Fred  Neuberth, 
Charles  H.  Caine,  R.  B.  Ritter, 
H.  E.  Walton,  R.  M.  Campion, 
W.  B.  Knight,  R.  C.  James,  Jr., 
S.  K.  MacDonald,  G.  M.  Cameron, 
H.  A.  Steinberg,  William  Bailey, 
P.  M.  Deeley,  R.  T.  Perron,  R.  W. 
Mitscher,  G.  O.  Tanner,  G.  W.  Piek- 
sen,  J.  E.  Muniot,  Jr.,  J.  Millar, 
G.     G.    Moss,    D.    S.    Hill,    R.    F. 


Becker  —  capacitors,  paper,  Dyk- 
anol,  mica,  wet  and  dry  electro- 
lytics  for  all  requirements  of  radio 
and  electrical  industries. 

Booth  207  Faraday  Ave. 

Cornish  Wire  Co.,  Inc. — W.  F.  Osier, 
Jr.,  J.  S.  Miller — radio  wires  and 
antenna  accessories. 

Booth  204  Marconi  Blvd. 

Coto-Coil  Co.,  Dae. — F.  C.  Henrikson 
and  Lewis  Bellem — amateur  radio 
parts..  .Booth  211  Steinmetz  Ave. 

Crowe    Name    Plate    &    Mfg.    Co. — 

Winslow  Goodwin,  W.  W.  Barry, 
M.  M.  Lane,  J.  L.  Robinson,  H.  Z. 
Benton,  A.  F.  Nosek,  F.  O.  Buffing- 
ton,  L.  R.  Gasper,  H.  R.  Whitacre, 
E.  P.  Walley — remote  controls; 
tuning  units;  escutcheons;  glass, 
metal  and  pyralin  dials;  name 
plates;   metal  cabinets. 

Booth  104-106  Marconi  Blvd. 

Tobe  Deutschmann  Corp.  - —  Tobe 
Deutschmann,  Arnold  Deutsch- 
mann, Mrs.  Mae  Strauss,  C.  W. 
Metcalf,  Mort  Hineman  —  filter- 
ettes,  condensers,  service  instru- 
ments, automatic  recorders  for 
frequency  testing. 

Booth  216  Marconi  Blvd. 

Drake  Electric  Works — George  Feigel 
and  W.  A.  Kuehl — -electric  solder- 
ing irons..  .Booth  110-112  Bell  St. 

Hugh  H.  Eby,  Die. — C.  N.  Wiltbank 

and     W;     F.     Bomke  —  sockets, 

switches,  plugs,  relays,  photo  cells. 

Booth  213  Hertz  Ave. 

Electro  Motive  Mfg.  Co.,  Die. — L.  B. 

Weyburn,  Philip  Lauter,  Nelson  J. 
Clark,  Harry  Fox — all  types  of  re- 
sistors and  condensers. 

Booth  209  Bell  St. 


"PETE"  HERRING,  SALES 
MANAGER,  RADIO  TODAY 

M.  E.  (Pete)  Herring  has  joined 
Radio  Today  as  vice-president  and 
sales  manager,  with  headquarters  at 
Chicago.  Mr.  Herring  was  for  ten 
years  publishing  director  of  Radio  Re- 
tailing and,  later,  Electronics,  in  which 
position  he  was  long  associated  with 
M.  Clements  and  O.  H.  Caldwell,  now 
of  Caldwell-Clements,  Inc.,  publishers 
cf  Radio  Today. 

"Pete,"  as  he  is  widely  known  in  ad- 
vertising circles,  started  his  publish- 
ing experience  in  St.  Louis  in  1921  as 
advertising  representative  for  the 
McGraw-Hill  electrical  papers,  and 
from  1923  to  1925  was  Cleveland  man- 
ager for  those  publications,  before  be- 
ing called  to  New  York  to  become 
sales  and  publishing  head  of  the  radio- 
electrical  trade  group.  As  the  result 
of  this  long  and  intimate  contact  with 
radio,  Mr.  Herring  brings  to  Radio 
Today  a  broad  and  valuable  experience 
in  radio  advertising  and  merchandis- 
ing, starting  with  the  early  inception 
of  the  radio  parts  business  and  con- 
tinuing through  to  the  present  form 
cf  receiver  distribution. 


M.  E.  Herring 


Electronic  Design  Corp.  —  John  S. 
Meek,  Robert  L.  Barr,  Earl  H. 
Petersen,  H.  Williams,  R.  O.  Lund, 
W.  Cannon — amplifiers,  sound  sys- 
tems and  accessories. 

Booth  113  Ampere  St. 

Electronic  Laboratories,  Inc. — Nor- 
man R.  Kevers,  William  W.  Gars- 
tang,  L.  C.  McCarthy — vibrators 
for  all  commercial  and  radio  ap- 
plications, vibrator  converters, 
Vibrapaks,  polarity  changers. 

Booth  210  Henry  Ave. 

Electro-Voice  Mfg.  Co. — A.  R.  Kahn 
and  Adolph  Schwartz  —  micro- 
phones (dynamic,  velocity  and  car- 
bon), microphone  stands. 

Booth  206  Marconi  Blvd. 

Garrard  Sales  Corp. — William  Car- 
duner  —  record  changers,  phono- 
graph assemblies  and  motors. 

Booth  213  Steinmetz  Ave. 

General  Cement  Mfg.  Co. — Stanley  B. 
Valiulis,  Richard  G.  Ellis,  Anthony 
C.  Valiulis — service  aids,  cements, 
finishes,  dial  cables,  dial  belts, 
specialties .  .  .  Booth  107  Edison  St. 

(To  page  53) 


20 


Radio  Today 


Top  square,  Allied  Radio  Distributors,  Indi- 
anapolis. Left  to  right,  J.  G.  Thomas,  Tom 
Hall,  Charlie  (Aerovox)  Golenpaul,0G.  Snively. 

Lower  square,  Edward   Spilker,   Fuss   Vogt 

and  Billie  Hunt  of  Reno  Radio  Co.,  Detroit, 

Mich. 


At  the   top,   C.   H.   Merrill   of  the  In  the  upper  row  are  Leon  Shriver,  P.  P.  Top,  R.  Moul- 

James   Bailey   Company,   Portland,  Porch,    Pete     Chapman    and    George    Ran-  den,       Tuscola 

Maine.  dolph,   Tenn.   Valley  Appliances,   Nashville.  (111.)  Radio. 

Lower    square, 

Shown    in    the    lower    square    are  Lower  row,  J.   E.   Aquin,   Bill  Shuler,  and  J.       Harper 

Frank  Paul  and  Emmett  Tydings,  H.   J.   Ballam   of   Shuler   Supply   Co.,   New  Stoddard, 

Ty dings  Co.,  Pittsburgh,  Pa.                                       Orleans,  La.  Memphis. 


PARTS  JOBBERS — LIVELY  AND  IMPORTANT 


Directly  below  are  Charlie  Brown  and  Hall  Gayhart 

of    Radio    Parts   Company,  Milwaukee,    Wis.,    with 

Charlie  Golenpaul  of  Aerovox  in  the  middle. 

At  bottom  of  page,  M.  H.  Edwards,  Providence,  R.  I. 


Right  below  are  F.  E.  Beaudry, 
B.  W.   Krell,   Columbia,  S.  C. 

Lower     photo,      F.     Ellinger, 

shown     with     Bill     Schoning, 

Lukko,  Chicago 


R.  N.  Crowden,  Radio 
Elec,    Ft.    Dodge,    la. 

Bottom  shot  shows  H. 

Rissi,     Radio     Supply, 

Detroit. 


Directly   below   is   George   S. 
Carson   of   Iowa    City,   Iowa. 

At    bottom    of    page,    W.    L. 

Wayman,     Radio     Specialties 

Co.,  Detroit. 


"INTERFERENCE" 
GOOD  SALES  OPENER 

"Good  morning,  madam.  I'm  check- 
ing up  on  radio  interference  in  this 
section  of  town.  I'm  from  Carnett 
Electric.  .  .  .  I'm  wondering  if  you're 
having  any  trouble  with  your  set  .  .  ." 
Thus  do  salesmen  of  the  Carnett  Elec- 
tric store,  Lubbock,  Texas,  make  prac- 
tical house-to-house  contacts  and  per- 
form a  practical  service  to  radio  set 
owners  at  the  same  time. 

If  the  set-owner  is  having  trouble, 
either  with  the  set  or  from  outside 
interference,  she  usually  tells  the 
salesman  so.  Upon  her  invitation,  he 
goes  in,  checks  over  the  set  and  de- 
termines to  the  best  of  his  ability 
what  the  trouble  is. 

If  the  set-owner  is  having  trouble, 
with  the  set  itself,  he  offers  to  send  a 
service  man  out  to  check  it  more  thor- 
oughly, pointing  out  that  the  service 
will  cost  nothing  unless  the  customer 
wishes  to  have  the  set  fixed  by  the 
shop  (if  such  service  is  needed) .  The 
radio  specialist  can  then  determine  its 
age,  general  condition  and  the  advisa- 
bility of  the  owner's  having  it  re- 
paired. Some  of  the  sales  depart- 
ment's most  lucrative  leads  come  from 
these  contacts. 

GOOD  BETS  FOR  EXTRA  SALES 

A  lively  series  of  spots  in  which 
radio  sets  may  be  sold  today  is  listed 
in  a  recent  jobber  bulletin  released 
by  Sales  Manager  J.  J.  Davin  of  De- 
trola.  The  ideas  were  outlined  in  re- 
spect to  the  "Pee  Wee"  models  and 
were  alertly  geared  to  the  1938  mar- 
ket.   Here   are   some  good   sales  bets 


FOR  A  LIFT 
IN  SALES 


mentioned  in  the  firm's  "Elash"  bul- 
letin : 

(1)  Punch  board  operators  who 
need  merchandise  prizes. 

(2)  Hotel  managers  who  can  rent 
receivers  to  guests. 

(3)  Buyers  of  electric  ranges,  who 
will  be  interested  in  a  kitchen  radio 
to  match. 

(4)  Sponsors  of  local  contests,  who 
require  suitable  prizes. 

(5)  Buyers  of  premiums. 

(6)  College  folk,  whose  colors  cor- 
respond to  radio  cabinet  colors. 

POSTCARDS  KEEP  THEM 
REMINDED 

*  A  personal  and  inexpensive 
method  of  keeping  prospects  aware  of 
radio  sales  and  service  offers  is  the 
practice  of  sending  about  1,500  post- 
cards every  three  weeks,  according  to 
G.  L.  Cox,  Glenn  Radio  Co.,  Washing- 
ton, D.  C.  The  device  has  been  given 
a  long-time  trial  at  Glenn's,  and  the 
report  is  that  "we  are  constantly  trac- 
ing business  to  this  idea  and  we  like 
it." 

Messages  on  the  cards  are  simple. 
Here  are  samples  of  catch  lines:  (1) 
Take  your  choice  of  weapons  against 
poor  radio  reception,  (2)  Radio  trou- 
bles are  no  mystery  to  our  service  de- 


Fine  setting  for  radio  display  is  the  lobby  of  your  local  theater.    Here's  how  dealer 
Caro  Miller  of  Hart's,  San  Jose,  Calif.,  tied  in  with  "Big  Broadcast  of  1938." 


partment,  (3)  When  doing  your 
spring  house  cleaning  let  us  recondi- 
tion your  old  radio,  and  (4)  Don't  look 
now,  but  did  you  know  that  Glenn 
Radio  gives  6  months'  guarantee  on 
new  radios?  These  are  followed  by 
brief  sales  material,  and  are  always 
accompanied  by  an  appropriate  and 
informal  free-hand  sketch. 

Glenn's  used  to  mail  the  cards,  but 
now  use  Western  Union  messenger 
service.  Latter  method  was  found  to 
be  cheaper,  and  also  the  messengers 
covered  homes  not  listed  in  the  tele- 
phone book. 

NEW  USES  FOR 
WIND-DRIVEN  GENERATORS 

*  Developed  first  to  generate  elec- 
tricity for  radio  sets,  wind-driven  gen- 
erators are  now  used  for  many  pur- 
poses. 

"We  are  now  applying  wind-electric 
equipment  for  lighting  sign  boards. 
We  have  a  number  of  installations 
over  the  country  and  the  Outdoor  Ad- 
vertising Association  has  recently  ap- 
proved Winchargers  for  this  use,"  re- 
ports Mort  Duff,  of  the  Wincharger 
Corporation,  Sioux  City,  Iowa. 

"The  Union  Pacific  Railway  is  now 
testing  our  Hi-Way  units.  These 
units  are  used  to  supply  lights  and 
electrical  conveniences  on  the  caboose. 
They  are  also  being  tested  for  use  on 
the  Pullman  cars  to  supply  lights  on 
the  train. 

"Probably  the  most  interesting  of 
all  is  our  adaptation  of  wind  electric 
for  use  in  preventing  pipe-line  corro- 
sion. Leading  gas-line  operators  are 
going  in  for  wind-electric  power  as 
the  ideal  way  to  protect  their  lines. 
Pipe-line  companies  have  been 
troubled  for  many  years  with  corro- 
sion or  disintegration  of  the  lines, 
which  has  necessitated  constant  repair 
work  and  replacement.  At  first,  it  was 
believed  that  the  corrosion  was  due  to 
a  chemical  action  of  the  ground,  but 
after  extensive  research,  their  engi- 
neers found  it  was  an  electrolytic  ac- 
tion. In  other  words,  the  metal  pipe 
was  acting  as  a  battery  plate  in  the 
ground  and  drawing  off  positive  ions, 
causing  the  pipe  to  disintegrate,  as 
the  electricity  flowed  from  positive  to 
negative. 

"They  have  been  able  to  halt  this 
action  by  planting  around  the  pipe  a 
bed  of  iron  and  connected  the  positive 
lead  wire  from  the  Wincharger  to  this 
bed  of  iron,  and  the  negative  to  the 
pipe,  thus  causing  current  to  be  re- 
versed and  halting  the  corrosion.  This 
is  commonly  known  in  the  oil  indus- 
try as  'cathodic  protection,'  and  Win- 
chargers  are  playing  an  important  role 
in  this  development." 


22 


Radio  Today 


June,  1938 


23 


SUMMER  APPLIANCE  $ 

Strokes  in  promotion  of  seasonal  lines. 


NATIONAL  WASHER-IRONER  EVENT 

Already  being  planned  by  the  mem- 
ber companies  of  the  American  Wash- 
ing Machine  Manufacturers'  Associa- 
tion is  a  National  Washer-Ironer 
Week,  set  for  Oct.  23-29.  Individual 
companies  will  plan  special  campaigns 
for  their  dealers,  and  general  promo- 
tion aids  will  be  released  by  the  Asso- 
ciation, according  to  Executive  Sec- 
retary J.   R.   Bohnen. 

Part  of  the  national  event  will  be 
to  enlist  the  cooperation  of  soap 
manufacturers,  suppliers  and  all  in- 
terests which  are  involved  in  the  home 
laundry   industry. 

REFRIGERATORS  SELL  SELVES 

A  new  stunt  for  dealers  to  use  in 
demonstrating  refrigerators  equipped 
with  radios  has  been  worked  out  with 
the  use  of  a  record  player  and  a  re- 
cording of  a  sales  talk.  Through  the 
radio  is  played  a  dialogue  between 
various  features  of  the  refrigerator, 
dramatized  in  a  form  novel  enough 
to  hold  the  interest  of  the  prospect 
while  the  salesman  points  out  the 
features  as  they  are  mentioned.  The 
device  naturally  emphasizes  the  ad- 
vantages of  radio-equipped  "boxes," 
and  demonstrates  itself  with  appro- 
priate music. 


Crosley  Radio  Corp.  is  sponsoring 
the  idea  for  selling  its  musical  Shelv- 
adors,  and  suggests  that  it  may  be 
used  for  doorway  displays,  sales  meet- 
ings, shows,  exhibitions,  as  well  as 
for   store   sales   presentations. 

FOR  ROOM  COOLERS 

There  is  one  question  which  every 
salesman  and  every  dealer  who  handles 
room  coolers  must  be  prepared  to  an- 
swer, declares  president  Richard  F. 
Roper  of  Pleasantaire  Corp.  Most 
prospects  want  to  know  immediately 
"how  much  will  the  room  cooler  lower 
the  temperature  in  my  room?" 

"It  is  altogether  natural  that  the 
prospect  should  ask  this  question  be- 
cause he  must  ask  something  of  the 
salesman  who  brings  him  something 
brand  new.  He  will  not  buy  a  'pig 
in  a  poke.' 

"Any  salesman  who  answers  this 
query  by  quoting  a  certain  number  of 
degrees  is  licked  before  he  starts.  If 
he  quotes  too  small  a  temperature  re- 
duction, the  prospect  loses  interest.  If 
he  promises  too  large  a  temperature 
drop,  the  prospect  will  buy  a  ther- 
mometer and  become  dissatisfied  if  he 
does  not  obtain  the  promised  reduc- 
tion. 

"The  ordinary  'dry  bulb'  thermome- 
ter is  not  a  gauge  of  human  comfort 


?LEASANTA[R 


and  should  not  be  used  for  measuring 
air  conditioning  efficiency.  The  thing 
to  do  is  to  use  a  hygrometer,  a  com- 
bination wet  and  dry  bulb  thermome- 
ter, so  that  the  amount  of  moisture  in 
the  air,  the  amount  of  air  circulation, 
and  the  dry  bulb  temperature  may  all 
be  taken  into  account." 


Better  Housing  Shows  are  ideal  demonstration  spots  for  room-cooler  interests. 
Here's  Garry  Eser,  Hochschild,  Kohn  &  Co.,  Baltimore,  at  such  an  event,  with 
room  and  all.     Entire  booth  was  used  in  the  store,  after  housing  show  closed. 


Four   new   Shefvctdors 

New  "Regular"  line  of  refrigerators 
introduced  by  Crosley  in  addition  to 
Standard  and  Deluxe  lines,  includes 
KB5-31,  KB5-452,  KB5-552  and  KB5- 
652.  with  capaciites  of  3.16,  4.5.  5.5 
and  6.5  cu.  ft.,  respectively.  List  prices 
range  from  $99.50  to  $149.95.  Features 
include  18-point  temperature  control, 
cold  storage  tray,  automatic  interior 
light,  removable  and  hinged  shelves. 
Bonderized  Dulux  finish  steel  cabinet, 
modernistic  base,  bottom  -  mounted 
units,  Electrosaver,  double  -  surface 
condenser,  etc.  Radio  optional  on  all 
except  KB5-31.  Five-year  protection 
plan  available  for  extra  $5.  Crosley 
Radio  Corp.,  Cincinnati,  Ohio. — Radio 
Today. 

Goodman  revolving  salesman 

*  Midget  turntable,  for  display  of 
radio  or  appliances  up  to  75  lbs.  12" 
metal  platform  turned  by  AC  motor. 
Uniform  speed  with  light  or  heavy 
loads;  does  not  burn  out  if  stalled. 
Only  3  moving  parts,  self-lubricating. 
No  radio  interference,  low  operating 
costs.  Will  take  larger  platforms  or 
superstructures.  Turntables  $10  to 
$15.  Goodman's  Rotary  Radio  Display 
Specialties,  19  W.  34th  St.,  New  York, 
N.  Y. — Radio  Today. 

Rhythmic  Ring  fans 

■*•  Adjustable  fans  with  2-point 
motor  suspension  to  minimize  noise 
and  vibration.  Streamlined  base,  mo- 
tor housing  of  torpedo  design,  mod- 
ernized guards,  aluminum  overlap- 
ping blades.  May  be  adjusted  to 
desired  angles  for  desk  use  or  wall 
mounting.  The  fans  come  in  two  lines, 
listing  from  $4.50  for  the  8"  straight 
to  $26.95  for  the  16"  oscillating.  Il- 
lustrated herewith  is  No.  730,  10"  os- 
cillator, with  3-speed  switch  listing  at 
$11.95.  Fitzgerald  Mfg.  Co.,  Torring- 
ton,  Conn. — Radio  Today 


24 


Radio  Today 


presents 


THE  FIRST  OF  A  LINE  OF 
STARTLING     1939     RADIO     VALUES 


RADIO 


WITH  KNOB 


TUNING,  TOO 


In  presenting  this  "calling  card"  of  its  1939  line,  Crosley  comes  through  with  a  truly 
sensational  value  to  start  dealers  off  with  a  bang! 

Startling  as  is  this  radio  value  it  is  merely  an  indication  of  what  is  yet  to  come  in  the 
complete  Crosley  line  for  1939. 

Crosley  dealers  can  get  going  now — closing  real  sales  volume  with  the  new  Crosley 
Vanity  push  button  radio  at  the  unprecedented  low  price  of  $9.99 — the  greatest  radio 
value  the  industry  has  ever  seen.  When  you  see  and  hear  it,  you  will  be  amazed  that 
such  a  truly  fine  radio  can  be  priced  so  low.  The  VANITY  is  a  graceful  little  model  in 
a  handsome  brown  plastic  cabinet  styled  by  radio's  foremost  designers.  Push  Button 
Tuning  is  instantaneous  and  accurate.  Stations  can  be  quickly  set  by  even  the  most 
inexpert  operator.  A  set  that  every  one  will  want  because  of  its  marvelous  tone 
and  performance — a  set  that  will  make  your  sales  volume  skyrocket. 


THE  VANITY  DeLuxe 

An  exquisite  model  in  an  old  ivory  Plaskon  molded 
cabinet,.  A  masterpiece  of  design  with  instantaneous, 
accurate  Push  Button  tuning  as  well  as  conventional 
knob  tuning.  Has  four  working  tubes  including  Beam 
Power  Tube  that  provides  increased  A-  ^-^  -.  -. 
volume  and  sensitivity.   A  certain  "best    Jk"l    y^#t/i7 


selle 


at 


unbelievably    low    price  of 
Price.?  slightly  higher  in  South  and  We 


Both  models  are  designed  for  two-posiLion  use — in  flat  position  with  the 
push  buttons  at  the  bottom  or  in  upright  position  with  the  push  buttons 
at  the  top.  Control  knobs  on  the  side  make  an  attractive  innovation. 
In   either  position   the   cabinet   may   serve   also   as  a   book-end. 


Remember,  this  is  only  the  "calling  card"  of  Crosley 's 
1939  line — see  this  startling  value  now — decide  that 
you  will  be  on  the  Crosley  "Band  Wagon"  and  going 
strong    when    the    rest    of    the    line    is    announced. 


THE    CROSLEY    RADIO    CORPORATION    -    CINCINNATI        Snc,ROSLEY  Jr 

Home  of  "the   Nation's   Station'' — WLW — 70   on   your  dial. 


June,  1938 


25 


YOUR  RECORDED  SALES 


RECORD  VOLUME  CONTINUES 

"The  rate  at  which  records  are  com- 
ing back  into  popular  favor  has  been 
comparatively  unaffected  by  recent  de- 
pressed business  in  other  fields,"  de- 
clares EGA  Victor  executive  E.  W. 
Wallerstein. 

"The  popularity  of  recorded  music 
is  experiencing  a  boom  without  prece- 
dence in  industrial  history,  with  the 
demand  about  equally  divided  between 
popular  music  of  the  'swing'  type  and 
the  more  serious  music. 

"Frequent  broadcasts  by  the 
world's  leading  artists  is  one  of  the 
biggest  influences  in  expanding  the 
ranks  of  music  lovers.  Record  sales 
have  increased  no  less  than  500  per 
cent  since  1933.  Fundamentally  the 
public  is  hungry  for  music  of  all  types 
and  records  are  the  best  means  of  pro- 
viding 'music  we  want,  when  we  want 
it.' " 

Mr.  Wallerstein  reported  on  the  re- 
markable success  of  the  Victor  Record 
Society  plan,  and  pointed  out  that 
around  80  per  cent  of  the  society  mem- 
bers are  new  converts  to  recorded 
music. 

The  RCA  company's  Thomas  F. 
Joyce  has  announced  a  50  per  cent  in- 
crease in  advertising  expenditures  for 
records  and  Victrolas. 


VOICE  MIRROR 

A  brand  new  source  of  store  in- 
come is  noted  by  radio  men  as  a  de- 
vice called  the  "Voice  Mirror"  makes 
its  appearance  in  the  field.  For  those 
who  have  a  "studio"  corner  in  their 
stores,  or  are  otherwise  sound  special- 
ists, the  new  merchandise  affords  a 
chance  to  sell  store  time  to  customers, 
or  to  sell  the  equipment  itself. 

The  Voice  Mirror  is  an  instrument 
which  records  the  voice,  and  at  the 
touch  of  a  switch,  instantly  plays  it 
back.  It  handles  speeches  of  any 
length,  reproduces  them  clearly  and 
any  number  of  times  until  automati- 
cally erased  by  turning  another 
switch.  This  is  accomplished  by  mag- 
netic recording  on  an  endless  steel 
tape.  Thus  the  Mirror  hecomes  an 
all-purpose  instrument  for  experiment 
and  study  in  speech,  song  and  instru- 
mental work. 

Attracted  to  the  instrument  are 
many  types  of  prospects  for  studio 
service  or  sales.  These  include  an- 
nouncers,   composers,    orchestra   lead- 


ers, stage  folk,  educators,  hard-of- 
hearing  groups,  speech  specialists  in 
medical  and  psychological  profes- 
sions, singers,  etc. 

The  Voice  Mirror,  along  with  other 
new  developments  of  a  special  nature 
for  sound  production  and  control,  is 
marketed  by  Acoustic  Consultants, 
Inc.,  1270  Sixth  Ave.,  New  York, 
N".  Y. 


Handy  record  file 

Size  10  x  14^4"  record  rack  which 
holds  50  discs  and  keeps  them  separated 
by  cloth-covered  dividers.  Designed 
to  fit  into  small  corners.  Sections  are 
numbered  and  index  card  provided  so 
that  any  title  can  be  conveniently  lo- 
cated. List.  $3.50.  Schloss  Bros.,  801 
E.  135th  St.,  New  York  City— Radio 
Today. 


Electric  portable  phonograph 

Compact  Port-O-Matic  model  will 
play  10  or  12"  records  with  top  closed. 
Crystal  pickup,  extra  record-carrying 
space,  individual  controls  for  tone  and 
volume,  Wondertone  chamber.  AC, 
$54.50;  AC-DC,  $59.50.  Port-O-Matic 
Corp.,  1013  Madison  Ave.,  New  York 
City — Radio  Today. 


Kenny  Baker  of  the  Jack  Benny  show 
has  made  new  hits  on   Decca  discs. 

WAX  WORTH  WATCHING 

HORACE  HEIDT  and  his  Brigadiers  playing  Ferdi- 
nand the  Bull  with  VC  by  the  Three  Kings  and  Eed 
Farrington,  and  Oh  Ma  Ma  with  VC  by  Eed  Farring- 
ton  and  Frank  De  Val — Brunswick   8138. 

THE  SOPHISTICATES  playing  Liebestraum  and 
Swing    Low,   Sweet   Chariot — Decca  1818. 

DICK  POWELL  with  Harry  Sosnick  and  his  orches- 
tra playing  The  Girl  in  the  Bonnet  of  Blue,  with  male 
quartet,  and  In  My  Little  Red   Book — Decca  1782. 

JIMMY  D0RSEY  and  his  orchestra  playing  Who 
Do  You  Think  I  Saw  Last  Night  with  VC  by  Don 
Matteson,  and  At  Your  Beck  and  Call  with  VC  by 
Bob  Eberle — Decca  1784. 

BENNY  GOODMAN  and  his  orchestra  playing  It's 
the  Dreamer  in  Me  and  Why'd  Ya  Make  Me  Fall  in 
Love?  both  with  Vr  by  Martha  Tilton — Victor  25846. 

FREDDIE    "SCHNICKELFRITZ"    FISHER    and   his 

orchestra  playing  Colonel  Corn  from  Warner  Bros. 
"Gold  Diggers  of  Paris"  with  VC  by  Freddie  Fisher, 
and  The  Wild  Wild  Women  with  VC  by  Stan  Fritts — 
Decca  1771. 

RUSS  MORGAN  orchestra  playing  Ten  Miles  from 
Town  with  VC  by  Russ  Morgan  and  Swing  Fourteen 
and  Will  You  Remember  Tonight  Tomorrow?  with  VC 
by  Russ  Morgan — Brunswick  S119. 

BUDDY  ROGERS  and  his  Famous  Swing  Band  play- 
ing This  Time  It's  Real  and  Lovelight  in  the  Star- 
light from  "Her  Jungle  Love"  both  with  VC  by  Bob 
Hannon — Vocalion  4058. 

RUDY  VALLEE  and  his  Connecticut  Yankees  play- 
ing The  Latin  Quarter  with  VR  by  Rudy  Vallee  and 
the  Gentlemen  Songsters,  and  A  Stranger  in  Paree 
with  VR  by  Vallee,  both  from  Warner  Bros.  "Gold 
Diggers  in  Paris" — Victor  25835. 

LARRY  CLINTON  and  his  orchestra  playing  Ferdi- 
nand the  Bull  from  the  Walt  Disney  production  of  the 
same  name  and  If  It  Rains  Who  Cares  both  with  VR 
by  Bea  Wain — Victor  28541. 

ABE  LYMAN  and  his  Californians  playing  A  Garden 
in  Granada  and  Sunday  in  the  Park  from  "Pins  and 
Needles,"    both    with    VR    by    Ed    Holly — Bluebird 


MAXINE  SULLIVAN  with  Claude  Thornhill's  orches- 
tra singing  A  Brown  Bird  Singing  and  THE  CHAR- 
IOTEERS singing  Speak  to  Me  of  Love — Vocalion  4068. 

EDDY  DUCHIN  and  his  orchestra  playing  Ride  Ten- 
derfoot Ride  and  I'll  Dream  Tonight,  both  from 
"Cowboy  From  Brooklyn,"  both  with  VC  by  Stanley 
Worth — Brunswick   8130. 

RUSS  MORGAN  and  his  orchestra  playing  I  Love 
a  Lassie  and  Casey  Jones,  featuring  the  Swing  Four- 
teen— Brunswick   8127. 

SHEP  FIELDS  and  his  Rippling  Rhythm  orchestra 
playing  This  Little  Ripple  Had  Rhythm,  vocal  refrain 
by  Bob  Goday  and  chorus,  and  You  Took  the  Words 
Right  Out  of  My  Heart,  vocal  refrain  by  Bob  Goday, 
both  from  "Big  Broadcast  of  1938"— Bluebird 
B7304. 


26 


Radio  Todav 


NEW  THINGS 

Latest   news   of  radio   products   from   manufacturers 


Automatic  tube   tester 

*  Push-button  type  tube  tester 
for  testing  all  types  of  tubes  in  a 
minimum  amount  of  time.  Roller 
index  shows  switches  to  be  set  up 
for  each  type  of  tube.  Locking 
type  push-buttons  complete  circuit 
arrangement  for  test  and  meter 
indicates  directly.  Short  test  also 
controlled  by  push  buttons.  Emis- 
sion type  of  tests.  Model  430 — net 
$34.50.  Triumph  Mfg.  Co.,  4017  W. 
Lake  St.,  Chicago,  111.— Radio  To- 
day. 


400  cycle  filter 

•  Filter  unit  for  passing  400 
cycle  audio  signal.  Used  in  aligning 
radio  sets — blocks  out  all  other  fre- 
quencies when  aligning  set  with  a 
400  cycle  modulated  oscillator  and 
output  meter.  Eliminates  need  of 
a  screened  room.  External  noises 
and  signals  eliminated.  Philco 
Radio  &  Television  Corp.,  Tioga  & 
C  Sts.,  Philadelphia,  Pa.— Radio 
Today. 


Marconiphone  combination 

*  Portable  automatic  phono- 
graph-radio combination  for  AC-DC 
operation.  Record  changer  will 
change  8  10-inch  records  and  play 
12-inch  discs.  High-fidelity  pick-up 
unit.  Dual  tone  control.  Dynamic 
speaker,  illuminated  dial.  Record 
compartment.  Model  D-6 — list  $110. 
Marconiphone,  Inc.,  679  Madison 
Ave.,  New  York,  N.  Y  —  Radio 
Today. 


Arcturus   midget  tubes 

*  Glass  type  midget  tubes  with 
octal  bases  for  use  in  small  sets. 
Height  from  2%  to  3  inches.  Types 
available  are:  6A8GT,  6K7GT, 
6Q7GT,  6J7GT,  25A6GT,  25L6GT, 
25Z6GT.  These  tubes  correspond  to 
the  G  line  of  tubes  having  same  type 
numbers.  Arcturus  Radio  Tube  Co., 
Newark,  N.  J. — Radio  Today. 


Shure  crystal  pick-up 

*  Economy  crystal  pick-up  for 
use  in  small  combinations  and  rec- 
ord players.  Rubber-isolated  pivot- 
bearing  assembly  is  designed  for 
single-hole  mounting.  Triple  mois- 
ture-proofed grafoil  bimorth  crystal 
cartridge.  Tracking  error  reduced 
by  "needle-tilt"  principle.  Output  of 
2VZ  volts  at  1000  cycles.  Model  94A 
— list  $6.50  with  arm  rest.  Shure 
Bros.,  225  W.  Huron  St.,  Chicago, 
111. — Radio    Today. 


L 


Motor  starting  capacitors 

*  Electrolytic  type  condensers 
for  motor  starting  and  other  AC 
applications.  Hermetically  sealed  in 
small  aluminum  cans  and  insulated 
with  fiber  sleeve.  Designed  for  a 
maximum  of  20  starts  per  hour, 
each  start  of  3  seconds  duration. 
For  all  fractional  horsepower  mo- 
tos.  Type  ETN.  Cornell  Dubilier 
Electric  Corp.,  S.  Plainfield,  N.  J. 
Radio  Today. 


Zephyr  tube  tester 

*  Cash  register  type  of  counter 
tube  tester  using  push  button 
switches.  Spin  chart  roll  until  type 
number  of  tube  appears — then  push 
down  buttons  according  to  num- 
bers shown  on  chart.  Large  double 
scale  illuminated  dial  then  reads 
good,  f,  or  oad.  Supreme  Instru- 
ments Corp.,  Greenwood,  Miss. — 
Radio   Today. 


SHUT- 


Mobile   amplifier 

*  28-watt  mobile  amplifier  op- 
erating on  110  AC  and  6  volts  DC. 
Changeover  accomplished  by  se- 
lector switch.  Motor  for  turntable 
operates  from  main  power  pack 
whether  on  6  or  110  volts.  Webster- 
Chicago  model  M-928.  Webster  Co., 
5622  Bloomingdale  Ave.,  Chicago, 
111. — Radio  Today. 


Recording  discs 

*  Recording  blank  with  low 
surface  noise,  easy  cutting  quality. 
Long  wearing,  non-deteriorating. 
Sustained  quality.  Available  in 
regular  sizes.  Audio  Devices,  Inc., 
1600  Broadway,  New  York,  N.  Y.— 
Radio  Today. 


Television  transformers 

*  Hi-voltage  and  filament  type 
transformers  for  use  with  the  new 
Kineoscope  television  tubes.  For 
use  with  type  879,  878  cathode  ray 
tubes  and  1800  and  1801  tubes. 
Thordarson  Electric  Mfg.  Co.,  500 
W.  Huron  St.,  Chicago,  111.— Radio 
Today. 


June,  1938 


27 


MORE  NEW  THINGS 


Multi-speaker  transformer 

*  Matching  transformer  for 
using  up  to  six  500  ohm  speakers 
from  a  250  or  500  ohm  line.  De- 
signed for  temporary  installations 
and  for  demonstration  work.  Two 
transformers  will  handle  12  speak- 
ers, etc.  Halldorson  Co.,  4500  Ra- 
venswood  Ave.,  Chicago,  III. — Radio 
Today. 


Television  demonstrator 

*  Pair  of  cathode-ray  oscillo- 
graphs to  provide  a  television  dem- 
onstration. One  unit  is  provided 
with  a  phasamajector  or  image  gen- 
erating tube.  Second  unit  uses  a 
teletron  or  television  receiving 
tube.  Three-inch  tubes  used  in  both 
units.  Allen  B.  DuMont  Labs.,  532 
Valley  Rd.,  Upper  Montclair,  N.  J. 
— Rabio  Today. 


Heavy-duty  wafer  socket 

*  Heavy-duty  socket  for  indus- 
trial and  amplifier  applications. 
Two-piece  construction  using  low- 
loss  bakelized  canvas.  Contacts  are 
heavy,  non-corrosive  metal  rein- 
forced with  sturdy  steel  clamps  to 
insure  perfect  contact  and  long  life. 
Available  in  all  standard  pin  ar- 
rangements. Hammarlund  Mfg.  Co., 
424  W.  33rd  St.,  New  York,  N.  Y.— 
Radio  Today. 


Raytheon  receiving  tubes 

*  Type  OA4G  is  a  cold  cathode 
triode  designed  for  use  in  remote 
controlled  AC  sets;  4A6G  is  a  twin 


triode  power  amplifier  for  battery 
sets.  6P5G  is  an  octal-based  triode 
with  the  same  characteristics  as 
the  76.  Type  6S7  is  a  low-drain 
pentode  amplifier  with  metal  bulb. 
RK1851  is  a  pentode  amplifier  for 
television  receivers.  Raytheon  Pro- 
duction Corp.,  55  Chapel  St.,  New- 
ton, Mass. — Radio  Today. 


Aerial  lead-in 


*  Connector  for  bringing  an- 
tenna leads  to  radio  set  through 
the  wall.  Cor-Nex  consists  of  a 
lightning  arrester,  inside  plate  with 
leads,  and  polarized  plug  with  cord. 
Easily  installed — present  neat  ap- 
pearance. Cornish  Wire  Co.,  30 
Church  St.,  New  York,  N.  Y  — 
Radio   Today. 


Film  type  recorder 

*  Filmograph  unit  for  general 
office  use.  Can  be  used  for  dictation, 
recording  phone  conversations,  con- 
ferences, etc.  Uses  standard  8  or 
16  mm.  movie  film.  80  minutes  con- 
versation can  be  recorded  on  a  100- 
foot  film.  Films  easily  filed  and 
take  up  but  little  storage  space. 
Model  D  illustrated.  Miles  Repro- 
ducer Co.,  Inc.,  812  Broadway,  New 
York,  N.  Y.— Radio  Today. 


Neon  indicating  lamp 

*  Bulls-eye  type  of  indicating 
lamp  using  neon  lamp.  Used  in 
amplifier,  radio,  transmitter  and 
other  electrical  equipment.  Bulb 
consumes  only  %  watt  and  has  3000 
hour  life.  Can  be  used  on  120  to 
500  volt  circuits.  Type  590  unit  less 
bulb — 80  cents.  H.  R.  Kirkland  Co., 
75  West  St.,  New  York,  N.  Y  — 
Radio  Today. 


Popular-priced  antenna 

*  All-wave  noise-reducing  an- 
tenna. Unit  complete  with  antenna 
wire,  transmission  line,  set  and  an- 
tenna transformers  and  accessories. 
Completely  assembled.  Type  600 — 
list  ?5.  Technical  Appliance  Corp., 
17  E.  16th  St.,  New  York,  N.  Y.— 
Radio  Today. 


J.  F.  D.  auto  antennas 

*  Cowl  and  hinge  type  auto  an- 
tennas. Admiralty  metal,  chromium 
plated.  Stainless  steel  top  exten- 
sion. Four  section  types — 72  and  98 
inches  extended.  May  be  installed 
in  five  minutes.  Heavy  lacquered 
low-loss  leads,  protected  by  shielded 
loom.  J.  F.  D.  Mfg.  Co.,  4111  Ft. 
Hamilton  Pky.,  Brooklyn,  N.  Y. — 
Radio   Today 


Univex  titler 

*  Low-cost  titler  designed  for 
use  with  Univex  cameras.  Made  of 
pressed  steel.  Lens  spacer  permits 
use  of  standard  camera  lense.  Ac- 
curate camera  mounting  is  provided 
which  directs  it  exactly  on  to  the 
titler  frame.  Complete  with  assort- 
ment of  title  cards  and  lettering  kit. 
List  $2.50.  Universal  Camera  Corp., 
32  W.  23rd  St.,  New  York,  N.  Y.— 
Radio  Today. 


High-power  transformer 
components 

*  High-power  transformers  and 
chokes  for  use  in  transmitters  and 
broadcasting  stations.  A  10  henry 
20  ampere  inductance  available  for 
use  with  a  400  K.V.A.  transformer 
bank  weighs  approximately  3% 
tons.  Other  similar  units  available. 
United  Transformer  Corp.,  72 
Spring  St.,  New  York,  N.  Y—  Radio 
Today. 


28 


Radio  Today 


MAKE  AFC  ALIGNMENT 


jmm^^m 

pa 

H3 

repi 

Hi 

lES'l 

""o" 

jaj 

WESTON  (Model  776) 

Oscillator 

individually  hand 

calibrated  dials 


WESTON  (Model  669) 
Vacuum  Tube  Voltmeter 


WESTON  (Model  772) 

Super-Sensitive  Analyzer 

sensitivity 

20,000  ohms-per-volt 


Push  button  tuning  provides  another  real  opportu- 
nity for  servicemen  properly  equipped.  Nothing 
complex,  nothing  time-consuming  about  AFC  align- 
ment when  you  have  these  3  dependable,  Weston 
instruments.  Instead,  perfect  alignment  is  a  quick, 
simple  operation  .  .  .  highly  profitable  the  Weston 
way.  And  equipped  with  these  3  instruments,  plus 
the  Weston  Tube  Checker,  you  are  set  for  all  serv- 
icing needs. 

If  you  are  anxious  to  save  money  on  your  instru- 
ment purchases  over  the  years  .  .  .  make  more 
money  servicing  every  year  ...  be  sure  your  instru- 
ments are  dependable  Westons.  The  coupon  will 
bring  you  complete  information,  as  well  as  a  copy  of 
the  "Weston  Pointer"  . . .  which  gives  profitable  sug- 
gestions and  short  cuts  for  AFC  alignment  and  on 
other  servicing  problems.  Return  the  coupon  today! 


Weston 


WESTON  ELECTRICAL  INSTRUMENT  CORPORATION 

597   Frelinghuysen   Avenue,  Newark,  N.  J 

Send  a  copy  of  the  WESTON  POINTER,  Vol.  I— and  literature  on 

WESTON  Instruments. 


NAME  . 


instruments 


CITY 


STATE , 


June,  1938 


29 


30 


Radio  Today 


MORE  NEW   THINGS 


Teletalk  intercommunicators 

*  Line  of  master,  fully-selective 
master,  and  annunciator  type  inter- 
phones. Fully-selective  system  unit 
illustrated  permits  simultaneous 
communication  between  any  pair 
of  instruments.  Annunciator  type 
handles  12  outlying  stations  and 
has  12  annunciators  to  indicate 
which  station  is  calling.  Speaker 
units  at  remote  points  have  call 
buttons,  and  may  be  located  at  dis- 
tances up  to  3000  fieet.  "Webster 
Electric  Co.,  Racine,  Wis. — Radio 
Today. 


Replacement  speakers 

*  5-speaker  line  of  permanent- 
magnet  type  construction  to  service 
all  types  of  sets  now  in  use.  Plug-in 
jack  universal  type  transformers 
match  all  tube  combinations  and 
lines.  Units  priced  from  $4  to 
$14.25.  Accurate  Electric  Co.,  3575 
Armitage  Ave.,  Chicago,  111. — Radio 
Today. 


Electric  soldering  tool 

+  Small  tool  with  two  carbon 
heating  elements  for  soldering 
small  parts  and  wires.  Extremely 
small — can  be  used  in  limited  space. 
Consumes  current  only  when  in  use. 
Metal  reaches  soldering  tempera- 
ture almost  instantly.  Operates  from 
AC  line  through  a  transformer. 
Consumes  100  watts.  For  all  radio 
and  electrical  work.  Type  1  Thermo- 
grip.  Ideal  Commutator  Dresser 
Co.,  4033  Park  Ave.,  Sycamore,  111 
— Radio  Today. 


Oil  condensers 

*  High-voltage  type  oil  con- 
densers in  oil-filled  and  wax-filled 
types.  Compact  units  in  rectangular 
cans.  Brackets  for  upright  or  in- 
verted mounting.  Impregnated  with 
super-dielectric  Hyvol  oil.  High  ten- 
sion pillar  terminals.  Available  in 
1,  2,  4,  mfd.— 600  to  3,000  volts. 
Aerovox  Corp..  70  Washington  St., 
Brooklyn,  N.    Y. — Radio   Today. 


Console  unit  amplifier 

*  All-metal  console  amplifier  af- 
fording complete  monitoring  facil- 
ities. Inclined  front  panel,  contains 
all  amplifier  controls,  a  5-inch  mon- 
itoring speaker  and  standby  and 
cue  switches.  Also  has  monitor 
mike.  Designed  for  theaters  and 
audition  studios.  Wholesale  Radio 
Service  Co.,  100  Sixth  Ave.,  New 
York,   N.   Y. — Radio   Today. 


Molded  plastic  knobs 

*  Complete  line  of  molded  knobs 
for  all  types  of  radio  and  sound 
equipment.  Lever  controls,  bar 
knobs,  push-button  knobs  and  many 
others  described  in  catalog.  Knob 
illustrated  is  the  No.  2250,  which 
is  streamlined  and  has  white  indi- 
cating line.  Length  is  2J4  inches. 
Model  2150  is  similar  but  IVi  inches 
long.  Harry  Davies  Molding  Co., 
1428  N.  Wells  St.,  Chicago,  111  — 
Radio  Today. 


Screw  driver  and  wire  dresser 

+  Combination  type  tool  having 
insulated  screw  driver  for  align- 
ment and  a  specially-hooked  end  for 
dressing  wires  and  testing  soldered 
joints.  Philco  Radio  &  Television 
Corp.,  Tioga  St.,  Philadelphia,  Pa  — 
Radio  Today. 

Dial  light  jewel  assembly 

*  Pilot  light  unit  which  mounts 
in  a  single  1-inch  hole.  Chrome 
plated  finish.  Supplied  with  candel- 
abra, miniature  bayonet,  miniature 
screw  bases.  Red.  green,  blue,  am- 
ber, opal  jewels.  Dial  Light  Co.  of 
America,  136  Liberty  St.,  New 
York,  N.  Y. — Radio  Today. 


Radiart  shaver  pack 

*  Vibrator  type  power  pack  per- 
mitting use  of  electric  razors  from 
a  6-volt  battery.  A  32-volt  model  also 
available  for  trains  and  farm  light- 
ing plants.  Radiart  Corp.,  Shaw 
Ave.  at  133rd,  Cleveland,  Ohio  — 
Radio  Today. 


Electronic  mixer 

*  Three-channel  electronic  mix- 
er which  overcomes  the  shunting 
effect  on  the  load  resistance  of  the 
tube  actuated  by  the  DC  plates  le- 
sistance  of  the  tubes  not  actuated. 
Volume  controls  located  in  the  out- 
put circuits.  Jefferson  Electric  Co., 
Bellwood,  111. — Radio  Today. 


Soldering   iron   stand 

•*•  Variable-heat  soldering  iron 
stand  with  protective  hood.  Handles 
up  to  a  150-watt  or  smaller  iron. 
Heat  controlled  by  switch.  Iron 
heats  fully  from  warm  position  in 
a  short  time.  Hood  prevents  acci- 
dental burns.  Model  300-H.— list  $4. 
Drake  Electric  Works,  3654  Lincoln 
Ave.,  Chicago,  111. — Radio  Today. 


Three-in-one  mike  stand 

*  Microphone  stand  with  velvet- 
action  self-adjusting  clutch.  One 
section  used  for  banquet  stand,  two 
sections  for  a  chair  stand,  and  three 
sections  for  a  floor  stand.  Ten-inch 
base  with  rubber  pads.  Brass  tubes 
and  cast-iron  base.  Model  MS-31 — 
list  ?9.  Atlas  Sound  Corp.,  1447-51 
39th  St.,  Brooklyn,  N.  Y—  Radio 
Today. 


June,  1938 


31 


MORE  NEW  THINGS 


Mobile  sound  system 

•  25-watt  sound  system  for  op- 
eration from  110  volts  AC  and  6 
volts  DC.  Housed  In  a  single  unit 
with  phono  turntable  and  pick-up. 
Dynamic  type  microphone  unaf- 
fected by  adverse  climatic  condi- 
tions. Dual  speakers.  Provisions  for 
remote  volume  control  and  meter 
monitoring.  Model  172.  Operadio 
Mfg.  Co.,  St.  Charles,  111.— Radio 
Today. 


Cage-type  resistors 

*  Ventilated  cage-type  resistors 
for  one,  two  or  four  resistors.  De- 
signed for  use  where  the  resistors 
must  be  protected  from  accidental 
contact.  Cages  with  sturdy  sheet 
metal  ends  and  with  perforated 
metal  sides.  Terminals  brought  out 
at  ends  by  feed-through  insulators. 
Ohmite  Mfg.  Co.,  4835  W.  Plournoy 
St.,   Chicago,   111. — Radio  Today. 


Low-cost  auto  antenna 

*  Hinge-mounting  antenna  for 
small  auto  radios.  Stainless  steel 
extension  and  chrome-plated  brass 
tubing.  Extends  to  47  inches.  36- 
inch  lead-in  partially  shielded.  Fits 
all  cars.  Model  9851— list  $1.95. 
RCA  Mfg.,  Co.,  Front  St.,  Camden, 
N.  J. — Radio  Today. 


Crystal  phonograph  pick-up 

*  Phonograph  pick-up  using  a 
crystal  element  which  is  thoroughly 
moisture-proofed,  sealed  in  molded 
flexible-rubber  housing  which  elimi- 
nates internal  resonance.  Metal 
outer  shell  serves  as  electro-mag- 
netic and  electrostatic  shield.  Crys- 
tal has  high  capacitance  and  low 
reactance.  Solid  walnut  tone  arm 
designed  to  reduce  tracking  errors 
down  to  3  to  4  per  cent.  Series  X-76. 
Webster  Electric  Co.,  Racine,  Wis. 
— Radio  Today. 


Ceramic  cased  mica 
condenser 

*  Mica  condenser  for  radio  re- 
ceivers. Postage  stamp  size.  High- 
grade  mica  and  foil  plates.  Wire 
terminals  anchored  to  plates. 
Housed  in  ceramic  case  and  im- 
bedded in  moisture  proof  cement. 
Extremely  stable  characteristics. 
Dumont  Electric  Co.,  Inc.,  514 
Broadway,  New  York,  N.  Y. — Radio 
Today. 


60-watt  amplifier 

*  High  -  power  amplifier  with 
automatic  volume  control  and  vol- 
ume expansion.  Dual  tone  controls. 
6-input  channels  and  5  -  channel 
mixer.  60-watts  undistorted  output. 
Inverse  feedback  to  reduce  distor- 
tion. Plug-in  connections.  Other 
Knight  1938  Styled  units  are  avail- 
able for  all  sound  requirements. 
Allied  Radio  Corp.,  833  W.  Jackson 
Blvd.,    Chicago,    111. — Radio    Today. 


Trimmer  condensers 

*  Line  of  trimmer  and  padder 
condensers  using  a  mica  dielectric. 
Designed  to  prevent  drift,  or  change 
with  temperature  or  moisture. 
Available  with  bakelite  or  ceramic 
bases.  Single  and  multiple  section 
units.  P.  R.  Mallory  &  Co.,  Indian- 
apolis,  Ind. — Radio  Today. 


Improved  tuning  eye 

*  Cathode-ray  type  tuning  indi- 
cator with  wide-angle  double-range 
tuning.  When  used  with  a  6AE6G 
control  tube,  a  doubleshadow  pat- 
tern is  obtained.  For  low  voltages 
the  shadow  on  one  half  closes  and 
the  other  remains  stationary.  When 
a  strong  signal  is  developed,  the 
second  shadow  then  takes  over  the 
function  of  indication.  Type  6AD6G 
tube.  National  Union  Radio  Corp., 
57  State  St.,  Newark,  N.  J.— Radio 
Today. 


Push-button  tuner 

*  Automatic  push-button  adapt- 
er unit  for  superhet  or  tuned  R.F. 
sets.  Selects  7  stations.  Release  but- 
ton returns  set  to  manual  opera- 
tion. May  be  mounted  vertically  or 
horizontally.  Type  10-7554  —  list 
$7.50.  Meissner  Mfg.  Co.,  Mt.  Car- 
mel,  111. — Radio  Today. 


Dynamic  microphone 

*  Uni-directional  dynamic  mi- 
crophone. Energy  response  pattern 
is  a  cardiod.  Wide  pick-up  angle 
from  front  and  apparent  dead  rear 
field.  High  output  level.  Output  im- 
pedances of  50,  200,  500  and  10,000 
ohms.  Model  9DT— list  $35  for  low 
impedance.  $37.50  for  high  impe- 
dance. American  Microphone  Co., 
1915  S.  Western  Ave.,  Los  Angeles, 
Calif. — Radio   Today. 


Wee  Pee  Wee  clip 

*  Extremely  small  insulated 
clip  for  radio  testing.  Thin  nosed 
for  use  in  crowded  chassis.  Will  not 
short  on  close-wound  coils.  Non- 
ferrous  material.  Black  and  red 
rubber  insulators.  Type  88  clip  with 
93  insulator — list  $.90  per  box  of 
10.  Mueller  Electric  Co.,  1583  E. 
31st  St.,  Cleveland,  Ohio.— Radio 
Today. 


C-B  service  lab 

*  Rack  type  of  service  lab.  for 
all  service  instruments.  Illustrated 
above  is  a  single  rack  section  with 
all-wave  signal  generator  type  110 
with  direct  reading  verni-vider  dial. 
Center  unit  is  the  127  uni-signal 
frequency  modulator  and  cathode 
ray  oscillograph.  Bottom  unit  is  the 
79C  beat  frequency  audio  oscillator. 
Clough-Brengle  Co.,  2815  W.  19th 
St.,   Chicago,   111. — Radio  Today. 


32 


Radio  Today 


f  M\ 


32  New  Ways  for  you 
To  Make  PROFITS! 


June,  1938 


33 


HE  CLIMAX  TO  FORT 


j  OFFERS  AMAZING  VALUE 


..... 


ELECTRIC  TUNING 
FOR  ALL 

VICTROLA  PUSH- 
BUTTON CONTROL 

VICTROLA  ATTACH- 
MENT "PLUG-IN" 

MASTER  NOISE 
ELIMINATOR 

RCA  VICTOR 
MASTER  ANTENNA 

RCA  VICTOR  TUBES 

HIGH  FIDELITY 

NEW  STYLE  CONTI- 
NENTAL, CONSOLE 
GRAND,  AND  18th 
CENTURY  CABINETS 

ELECTRICAL 
MAGIC  VOICE 

TRIPLE-CONE 
SPEAKER 

NEW  FULL-VISION  DIAL 


RCA  Victor  Table  Model  96T1 

Electric  Tuning  for  5  stations,  RCA  Vic- 
tor Metal  Tubes,  Standard  Broadcasts  and 
Police  Calls,  Magnetite  "frequency-lock- 
ing" Transformers,  Electro-dynamic 
Speaker,  Continental  Style  Cabinet,  and 
many  other  features.  $34.95* 


RCA  Victor  Table  Model  9X 

Cabinet  available  in  walnut  and  four  distinctive 
colors— onyx  brown,  Brazilian  onyx  green,  Ari-  "^ 
zona  onyx  green,  onyx  black.  AC-DC  operation. 
Built-in  Antenna.  The  price— see  your  distributor. 


RCA  Victor  Model  97KG 

Electric  Tuning  for  6  stations,  Victrola 
Push-Button  Control,  Victrola  Attach- 
ment "Plug-In",  Console  Grand  Cabi- 
net, Magic  Eye,  RCA  Victor  Metal 
Tubes.  $85.00* 

*Prices  f.o.b.  Camden,  N.  J.,  subject  to 
change  without  notice. 


HOW—  More  Than  Ever  Before . 
The  Road  to  PROFITS  is  Marke 


34 


Radio  Today 


for  1939 


RCA  Victrola  Model  U-128 

Has  new  gentle  action,  automatic 
Record  Changer  for  10"  and  12"  rec- 
ords, Crystal  Pick-up  with  top  needle 
loading,  Electric  Tuning  for  8  stations, 
12"  Dynamic  Speaker,  10  RCA  Victor 
Tubes.  $185.00*  including  RCA  Victor 
Master  Antenna  and  S9.00  worth  of 
Victor  Records. 


RCA  Victrola  Model  U-lll 

Instrument  has  Feather-touch  Crystal 
Pick-up,  True-Tracking  Tone-Arm, 
Synchronous  Electric  Motor,  Tone 
Control.  The  radio  gets  Domestic 
Broadcasts  and  Police  Calls.    $39-95* 

RCA  Victrola  Model  R-89 

(Phonograph  only.)  Plays  10"  and  12" 
records,  has  Feather-touch  Crystal 
^.  Pick-up,  True-Tracking  Tone-Arm, 
Cushion-mounted  Constant  Speed 
Motor,  RCA  Victor  Tubes  and  other 
fine  sales  features.  $24.50* 


NEW  GENTLE-ACTION 

AUTOMATIC  RECORD 

CHANGER 

TOP-LOADING 
CRYSTAL  PICK-UP 

TRUE-TRACKING 
TONE-ARM 

HIGH  FIDELITY 

TRIPLE-CONE 
SPEAKER 

RCA  VICTOR 
ELECTRIC  TUNING 

CABINETS  OF  NEW  AND 
UNUSUAL  BEAUTY 


Victor  Record  Society  Steps 
Up  Victor  Record  Sales! 

The  Victor  Record  Society,  which 
has  sent  record  sales  soaring  to  new 
peaks,  will  continue  to  make  money 
for  dealers,  not  only  from  the  stand- 
point of  record  sales,  but  Victrola 
sales  as  well !  For  the  Society's  bene- 
fits are  now  included  in  the  price  of 
the  1939  RCA  Victrolas. 


Way 


June,  1938 


35 


r*i5 


Q& 


oi^C 


A  Weekly  Radio  Message  to  3,000,000  Homes! 

The  RCA  Magic  Key  program,  broadcast  every 
Sunday  on  an  NBC  network  of  107  stations— and 
Victor  Record  programs,  broadcast  6  times  weekly 
on  9  stations— will  feature  the  new  radios  and 
Victrolas  in  strong  commercial  announcements. 

An  Audience  of  17,988,000  Magazine  Readers! 

Printed  advertising  on  radios  and  Victrolas  will  do 
a  mighty  selling  job  for  you!  Some  of  the  many 
publications  RCA  Victor  will  use  to  pound  home 
its  sales  story  on  radios  and  Victrolas  include  fre- 
quent, consistent,  4-color  pages  in  the  Saturday 
Evening  Post  and  Collier's,  four  pages  per  adver- 
tisement in  the  "Listen"  supplement  of  Life,  Radio 
Guide,  American  Home,  American  Magazine, 
Cosmopolitan,  Time,  New  Yorker,  Scribner's, 
Esquire,  National  Geographic,  Nation  and  Amer- 
ican Mercury. 

For  your  own  use,  RCA  Victor  has  prepared  a  large 
and  widely  varied  series  of  cooperative  advertise- 
ments which  advertising  experts  pronounce  the 
most  forceful  and  effective  they've  ever  seen. 


FOR  FINER  RADIO  PERFORMANCE 


RCA  VICTOR  RADIO  TUBES 


RCA  presents  the  Magic  Key  every  Sunday,  2  to  3  P.  M.,  E.  D.  S.  T., 
on  the  NBC  Blue  Network. 


rx 


'T 


THE  SATVRDA 
teNINGPOS. 


New 

Sales-Producing 

Promotional  Material 

For  you,  too,  RCA  Victor  has  pre- 
pared a  splendid  array  of  promotional 
material  including  some  of  the  most 
ingenious  window  and  floor  displays 
you've  ever  seen.  The  first  display  of 
the  1938-39window  service  is  shown 
above.  Your  RCA  Victor  distributor 
will  be  glad  to  give  you  full  details 
about  the  new  window  displays. 
They'll  combine  with  the  advertising 
to  bring  you  more  calls  than  ever^be- 
fore— and  when  people  call— they  buy! 


36 


f>H° 


fits. 


XeAMc&t 


RCA  Manufacturing  Company,  Inc.,  Camden,  N.  J 


A  Service  of  the  Radio  Corporation  of  America 


Radio  Today 


WHAT  IT  COSTS  TO  OPERATE  A  SERVICE  BUSINESS 


Helpful  pointers  on  Figuring  overhead 


"Get  out  of  the  business  of  merely 
repairing  sets,"  was  Arthur  E.  Rhine's 
advice  to  the  members  of  the  New  York 
R.S.A.  at  the  May  9  meeting,  and  he 
quickly  added:  "Get  into  the  business 
of  selling  radio   knowledge!" 

Mr.  Rhine,  who  has  a  large  service 
organization  at  158  W.  230th  Street, 
New  York  City,  made  this  as  his  intro- 
ductory statement  to  his  talk  on  the 
cost  of  operating  a  radio  service  busi- 
ness. In  order  to  illustrate  how  the 
operating  costs  mount  up,  Rhine  pre- 
sented some  representative  figures 
which,  he  said,  were  entirely  reason- 
able for  even  the  most  modest  radio 
business.  And  for  average  size  shops 
the  costs  would  unquestionably  be 
greater. 

Assuming  a  two-man  shop,  the  pro- 
prietor's salary  might  be  $30  a  week, 
while  the  helper  would  get  $15.  This 
means  a  total  of  $45  a  week  or  $195  a 
month  for  salaries.   ' 

Other  expenses  on  a  monthly  basis 
are  as  follows: 

Rent $25.00 

Electricity    4.00 

Telephone  6.50 

Advertising,  including  postage..     3.00 
Service  manuals  and  magazines.     1.65 

Tools    1.00 

Workmen's  compensation    7.00 

Social  security  for  helper 65 


Uncollectible  accounts   3.45 

Car  depreciation 10.00 

Gasoline  for  car  16.50 

Car  repairs    1.50 

Tires  for  car  2.00 

License  plates  1.25 

Garage  for  car 6.00 

Depreciation  on  test  equip 8.00 

Heat  for  store none 

Insurance  on  car  and  store none 

Other  taxes    none 

Depreciation  on  fixtures none 

Idle  time   (helper  &  owner)....   78.00 

Total  expenses    $175.50 

(exclusive  of  salaries) 
Most  of  the  items  are  so  simple  as 
to  need  no  explanation.  Test  equip- 
ment is  valued  at  $480  and  is  assumed 
as  having  a  5-year  life,  which  means 
that  it  depreciates  at  the  rate  of  $96  a 
year,  or  $8  a  month.  Automobile  de- 
preciation is  based  on  the  purchase  of 
a  $300  car  which  two  years  later  is 
worth  $60,  thus  representing  $120  a 
year  depreciation. 

Working  vs.  idle  time 

Idle  time,  the  last  item  on  the  list, 
takes  into  account  the  time  which  is 
wasted  around  the  store  waiting  for 
calls  getting  parts  from  the  jobber,  and 
all  other  things  which  are  not  charged 
to  the  customer  as  labor. 

Assuming  a  60-hour  week,  a  total  of 


THE  LOAD  ON  THE  BACK  OF  THE  SERVICEMAN— "OVERHEAD" 


Every  hour  that  he  works,  the  serviceman  must  earn  $1.12  to  cover  the  items  of 

overhead,  rent,  telephone,  auto,  bad  debts,  etc.,  besides  earning  the  75  cents  for 

an  hour's  wages  to  himself  and  helper.    Thus  overhead  costs  iyz  times  as  much 

as  productive  labor. 


240  working  hours  per  month  are 
available.  Of  this  240  hours  only  about 
60  per  cent  of  the  time,  or  156  hours. 
Is  directly  chargeable  as  labor  on  cus- 
tomers' jobs;  therefore  the  remaining 
40  per  cent  must  be  charged  up  to  over- 
head expenses.  Since  this  applies  to 
both  owner  and  his  helper,  $78  of  the 
$195  payroll  becomes  overhead  rather 
than  a  labor  charge. 

The  item  of  $3  for  advertising  is  ex- 
tremely low  and  in  keeping  with  the 
other  items.  Postage,  business  cards, 
signs,  folders,  and  other  items  cer- 
tainly are  more  than  75  cents  a  week. 
However,  to  keep  everything  at  rock 
bottom,  this  low  figure  is  used.  Note 
also  that  some  items  are  not  even  in- 
cluded in  the  total,  although  they  are 
listed  so  that  the  serviceman  will  not 
forget  about  them. 

Workmen's  compensation  will  vary 
throughout  the  country.  In  New  York 
it  is  $7  a  month — in  some  states  it  may 
be  nothing. 

In  a  previous  paragraph  it  was  stated 
that  the  idle  time  was  $78 — that  means 
that  the  total  time  sold  was  valued 
at  $195— $78  or  $117.  Note  carefully 
that  the  overhead  item  of  $175.50  is 
150  per  cent  of  the  labor  sold.  (In 
other  words,  if  the  labor  cost  is  $.75 
figured  on  the  hourly  rate,  the  over- 
head cost  is  an  additional  $1.12). 

Cost  of  doing  business 

Adding  the  total  time  sold  and  the 
total  expenses,  one  gets  $292.50  as  the 
total  cost  of  doing  business  for  the 
month.  Since  the  time  that  was  sal- 
able is  only  60  per  cent  of  the  total 
of  240  hours  monthly,  or  156  hours, 
the  cost  of  doing  business  per  hour  is 

$292.50  -f- 156  or  $1.87  per  hour. 
This  cost  of  $1.87  per  hour  is  net  cost 
or  actual  cost.  It  does  not  represent 
any  profit  whatsoever.  A  mark-up  of 
20  per  cent  for  profit  raises  this  figure 
to  $2.25  an  hour.  Such  a  mark-up  will 
make  a  profit  of  about  $600  for  the 
year,  which  is  not  very  much  on  an 
annual  business  of  about  $3,600. 

Rhine  stated  this  20  per  cent  mark-up 
is  a  minimum  for  profit  and  suggested 
that  the  serviceman  use  his  judgment 
as  to  whether  or  not  it  be  increased. 
Based  on  $2.25  an  hour,  the  profit 
earned  is  only  16%  per  cent. 

It  was  Rhine's  contention  that  no 
serviceman  should  make  a  single  trans- 
action until  he  had  figured  his  costs. 
After  all,  what  is  the  sense  of  doing 
business  unless  a  profit  is  made?  And 
when  quoting  prices  on  jobs,  do  not 
accept  one  cent  less  than  the  estimate. 

In  concluding  Rhine  advised  every 
serviceman  to  make  his  present  busi- 
ness profitable  before  trying  to  increase 
the  size  of  it.  It  is  profit,  and  not  vol- 
ume that  counts. 


June,  1938 


37 


AUDITORIUM  PA  JOB  WITH 
CONCEALED  UNITS 

The  auditorium  of  the  ISTew  York 
Academy  of  Medicine  has  recently 
been  equipped  with  a  modern  public- 
address  system.  The  medical  profes- 
sion considers  this  auditorium  one  of 
the  most  famous  lecture  halls  in  the 
country,  and  for  a  number  of  years 
there  was  much  talk  about  the  instal- 
lation of  such  a  sound  system. 

Two  major  difficulties  were  encoun- 
tered in  the  selection  of  a  suitable 
P.A.  system  for  this  auditorium. 
First,  it  was  necessary  to  install  the 
equipment  so  that  all  of  it  would  be 
concealed  from  view.  The  second  dif- 
ficulty was  that  usual  bugbear  found 
in  auditoriums,  poor  acoustics. 

After  service  engineering  layouts 
were  proposed,  the  equipment  installed 
included:  A  Western  Electric  "salt 
shaker"  dynamic  microphone  installed 
at  the  speaker's  rostrum.  A  small 
American  dynamic  microphone  at- 
tached to  the  wall  alongside  the  mo- 
tion-picture screen.  Two  Cinauda- 
graph  speaker  units  and  air-column 
horns  installed  behind  the  grille  of 
air  ducts  which  are  located  at  the  left 
and  right  sides  of  the  proscenium.  A 
Lafayette  30-watt  amplifier  concealed 
below  the  speaker's  rostrum. 

A  remote  volume  control  was  in- 
stalled at  the  rear  of  the  auditorium 
as  being  the  most  logical  place  to 
control  the  volume  from  the  loud- 
speakers. The  connecting  wires  and 
all  the  various  components  with  the 
exception  of  the  two  microphones  and 


^SPEAKER* 
S  ^HIDDEN  IK 
\&\  AIR  DUCT: 


the  one  volume-control  knob  on  the 
back  wall  of  the  auditorium  were 
completely  concealed  from  view. 

Earphones  are  available  in  various 
parts  of  the  auditorium  for  use  by 
those  who  are  hard  of  hearing.  These 
are  now  connected  to  the  Lafayette 
amplifier. 

Two  separate  volume  controls  are 
incorporated  in  the  amplifier  to  allow 
adjustment  of  the  volume  from  each 
microphone.  A  remote-control  unit  at 
the  rear  of  the  auditorium  is  actually 
the  "master"  volume  control.  This 
"point  of  reception"  control  permits 
adjusting  the  volume  to  the  best  level. 
Thus  the  amplifier  can  be  installed 
behind  the  scenes  out  of  sight. 

TOLL-COLLECTORS  USE 
COMMUNICATORS 

*  Toll  booths  for  bridges  and  tun- 
nels provide  a  threefold  use  for  in- 
ter-communication systems.  The  sev- 
eral booths  at  toll-collection  points  are 
in  most  all  cases  under  the  supervi- 
sion of  one  man.  Inter-communica- 
tors allow  the  supervisor  to  listen  in, 
so  that  in  cases  of  disputes  (which 
do  arise  frequently)  the  supervisor 
has  the  opportunity  .to  hear  both  sides 
of  the  argument  and  thereby  be  of 
valuable  assistance  to  his  subordinate. 


Insert  sketch,  upper  right,  shows  how  speaker  was  concealed  by  Wholesale  Radio 
engineers  behind  grills  over  doorway. 

38 


As  these  toll  points  are  generally 
managed  by  police  departments,  flash 
instructions  for  capturing  criminals 
can  also  be  transmitted  instantane- 
ously to  all  booths.  Use  of  inter- 
communicators  also  permits  the  indi- 
vidual collector  to  summon  aid  when 
necessary,  as  in  the  case  of  attempted 
robbery. 

SOUND -GIFT  FOR 
GRADUATING  CLASSES 

Each  graduating  class  likes  to  leave 
behind  a  gift  to  its  alma  mater, 
whether  college,  university  or  high 
school. 

Under  the  direction  of  Parts  Man- 
ager Bob  Herr,  Philco  is  running  a 
Spring  campaign  on  portable  sound 
amplifiers  addressed  to  graduating 
classes  in  the  country's  schools  and 
colleges,  and  built  upon  this,  custom 
of  graduating  classes  to  make  a  de- 
parting gift  to  their  schools.  With 
sound  amplification  finding  steadily- 
increasing  uses  in  schools,  Herr  points 
out  that  a  portable  amplifier  is  an 
ideal  class  gift — and  therefore  the 
campaign  directed  at  the  coming  June 
exodus. 

CRYSTAL  VS. 
VELOCITY  MIKES 

Editor  Radio  Today: 

Referring  to  articles  on  microphones 
in  your  April  and  May  issues: 

(1)  I  find  no  reason  to  believe  that 
velocities  cannot  be  used  out  of  doors. 
For  ordinary  pickups,  I  bave  used 
velocities  without  any  interference 
from  wind,  with,  the  exception  of 
storms.  I  have  bad  the  ribbons  ex- 
posed to  as  high  as  a  40-mile  an  hour 
gale  and  nothing  was  blown  out. 

(2)  I  find  the  response  of  ribbon 
mikes  to  be  flat  (as  discerned  by  ear, 
and  not  by  measurements). 

(3)  I  do  not  agree  with  Mr.  Rutten- 
berg  that  ribbon  mikes  can  be  con- 
nected in  parallel  without  losses  in 
both  output  and  frequency  discrimina- 
tion. I  bave  always  used  my  mikes 
through  an  electronic  mixer,  and  would 
never  parallel  them.  I  have  also  found 
it  fairly  practical  to  parallel  crystal 
mikes  when  the  cable  length  does  not 
exceed  sixty  feet. 

(4)  I  find  that  it  reduces  hum  level 
to  any  high  impedance  mike  if  it  is 
grounded.  I  also  find  that  I  cannot 
operate  the  older  types  of  velocities  in 
any  AC  field  due  to  heavy  hum  pickup 
through  the  mike  transformer. 

In  closing  I  would  like  to  say  that 
I  am  inclined  to  favor  the  crystal 
mikes  for  their  ability  to  take  a  lick- 
ing and  still  do  as  good  a  job  as  be- 
fore. 

Simon  Friedlander, 

Sound  Service. 

363  Victory  Blvd. 

Tompkinsville,  Staten  Island,  N.  Y. 


Radio  Today 


*A^ 


itarif  re f pome 

IULL   #>*-^ME  microphone) 

^WITH  THE  SA^  / 

THE  ACOUSTIC  COMPENSATOR 

I^Sjpat.  pend.) 

Bvq  cost! 
ir  gives 
you  these  advantages:  Iftk 


)  With  the  (lip  of  a  finger,  you  can  now  lower  or  raise  the  response 
of  the  microphone — without  introducing  any  peaks  or  other  undea" 
able  effects.(/Vot  a  voiume  control.  Gradually  changes  operation 
the  microphone  from  constant  velocity  to  constant  pressure.) 

(2)  Permits  adjustment  of  the  microphone  for  most  desirable  res; 
for  close  talking  or  distant  pickup. 

(3)  Makes  the  system  immediately   adjustable  to  any  "taste 
condition,  or  equipment. 


MODELS  RBHK.  RBMk.  with  Acoustic  Compensator.  Frequency 
range  40  to  1 1000  CPS.  Output,  -65  db.  Complete  with  switch,  cable 
connector  and  25'  of  cable.  .  .  .  $42.00  LIST.  Chrome,  $43.00  List. 
MODELS  RBHn,  RBMn,  without  acoustic  compensator,  $42.00  LIST 


J*      IMPROVES    ANY 
I  "LOW-COST" 

INSTALLATION 
ON  4  COUNTS! 

P.  A.  Men,  you  can  im- 
prove those  "price"  jobs 
by  using  the  popular  Axn- 
periteModel  RAH(orRAL). 
You  will  get  better  results 
because  (1)  it  is  excellent 
for  both  speech  and  music; 
(2)  has  flat  response  with- 
out undesirable  peaks;  (3) 
reduces  feedback;  (4) 
stands    up    under   rough 
handling,  changes  in  tem- 
perature,  pressure  or 
humidity.  .  .  .  Frequency  range  60 
to  7500  cps.  Output,  -68  db. 
MODEL  RAH  (Hi-imp.)  with  12'  of 
cable;  MODEL  RAL  (200  ohms)  with 
8'  of  cable ONLY  $22.00  LIST 


NEW  LOW-PRICED  CONTACT 
MICROPHONE  ..$12. 00  LIST 

The  success  of  our  Model  KTH  ($22.00  List)  has  created 
a  demand  for  a  popular-priced  Amperite  Contact 
Microphone.  The  new  model  listed  below  can  be  used 
on  most  radio  sets  made  since  1935  and  on  all  P. A. 
systems.  It  "makes  an  ordinary  violin  sound  like  a 
Strad"  . . .  gives  a  small  piano  the  tone  of  a  Grand.  And 
yet,  there  is  no  distortion.  No  unnatural  etfects.  No 
"fingering  noises."  Installation  is  simple  ...  no  changes 
in  strings  or  instruments  .  .  .  attached  without  tools. 

Operates  with  either  high  or  low  gain  ampli- 
fiers. Has  frequency  response  of  40  to  9000  cps. 
Output,  - 40  db.  20' of  cable. 

MODEL  SKH  (Hi-imp);  SKL  (200  ohms)  $12.00  LIST 
SKH  or  SKL  with  toot-operated 

volume  control $20.00  LIST 

Professional  Model  KTH  (or  KTL)  $22.00  LIST 


"TOPS  IN  MIKES" 

Station  KVOL,  of  Lafa- 
yette, La.,  writes  us,  unso- 
licited: ".  .  .  the  Amperite 
mikes  have  been  in  serv- 
ice here  for  almost  three 
years,  and  have  proven 
themselves  to  be  "tops"  in 
mikes.  They  have  broad- 
casted in  the  rain  and  in 
the  hot  sun.   They  have 
even  been  dropped,  but 
they  always  came  through 
in  fine  shape  .   .   ."  The 
Amperite  Studio  Velocity 
Model  SR80n  now  has  -56 
db  output  Frequency  range  40  to 
15000  cps.  Triple  shielded,  fitted 
with  switch,  (optional),  cable  con- 
nector, and  25'  of  cable. 
MODEL  SR80n  (200  ohms);  S80.00  LIST 
MODEL  SR80Hn  (Hi-imp.),..  S80.00  LIST 


Salei    -flldi  rot  the  P.   -ft.  /nan  Amperite  offers  the  following  co-operation  to  P.A.  Men. 

(U  FREE  Window  Decal  advertising  your  Sound  Service.  Size  S'/i  x  S'A.  finished  in  4  striking  ^tnj&^^H^e^, 
colors.  (2.)  FREE  Window  Display,  11x17.  (3.)  Special  Sound  Equipment  Letterheads.  Samples  v^^S/jj^J^ 
and  prices  on  request.  (4.)  FREE  use  of  cut  for  printing  business  cards,  etc. 

Write  tor  these  valuable  sales  helps,  and  new  Illustrated  Bulletins,  today! 


H 


Amperite  (a 


561  BROADWAY,  N.  Y.    U.S.A. 


CABLE  ADDRESS 
ALKEM.  NEW  YORK 


AMPERITE 


MICROPHONES 


June,  1938 


39 


DYNAMIC  TESTING  OF  RADIOS 

Sources  of  Frequency  discrimination  in  audio  amplifiers 


Resistance-coupled    circuit    showing 
coupling  and  shunt  capacities. 

The  audio  frequency  response  of  a 
radio  set  is  an  important  factor  in  the 
proper  reproduction  of  radio  programs. 
It  is  one  thing  that  largely  determines 
the  tone  quality  of  a  radio  set— and 
tone  is  one  of  the  most  important  fea- 
tures of  a  radio  set. 

Therefore,  if  a  serviceman  is  to  be 
successful  in  his  repair  jobs,  he  must 
return  the  set  with  the  same  tone 
quality  that  it  had  before  needing 
servicing.  By  listening  to  a  radio  pro- 
gram, or,  better  still,  several  different 
types  of  programs,  the  capable  radio- 
man should  be  able  to  tell  whether  or 
not  the  set  is  operating  okay  from  a 
tonal  viewpoint.  If  the  set  does  not 
have  the  proper  tone,  then  a  mere 
listening  test  to  a  broadcast  station 
is  not  usually  sufficient  to  tell  just 
what  the  difficulty  is  and  where  it  lies. 

Amplitude  distortion 

As  stated  last  month  in  Radio 
Today,  on  page  30,  audio  frequency 
discrimination  is  a  form  of  distortion, 
in  that  the  amplitude  of  the  various 
frequencies  is  changed  in  proportion 
to  each  other.  Therefore  a  test  of  the 
audio  frequency  response  of  a  set  is 
an  important  part  of  dynamic  testing. 

Frequency  discrimination  is  caused 
by  circuits  external  to  the  tube,  in 
contrast  to  harmonic  distortion  which 


is  mainly  caused  by  the  non-linear 
characteristic  of  the  tube.  These  cir- 
cuit elements  may  be  resistors,  con- 
densers, and  inductances  including 
audio   transformers. 

In  a  resistance-coupled  circuit,  the 
input  circuit  employed  Is  similar  to 
that  shown  in  Fig.  1.  Note  that  the 
tube  has  a  capacity  across  the  grid 
resistor  which  may  be  represented  by 
C„k.  Usually  this  tube  capacity  is  not 
of  much  importance  in  radio  set  amp- 
lifiers. The  blocking  capacity  C  is  ex- 
tremely important  in  determining  the 
low-frequency  response  of  the  stage. 
Also  the  grid  resistor  Rff  is  important 
in  this  respect  since  the  two  are  ef- 
fectively in  series  as  shown  in  Fig.  2. 
The  capacity  C  can  be  thought  of  as 
an  AC  resistance  in  series  with  Rg. 
Unless  this  AC  resistance  is  low  in 
comparison  to  Rg,  it  is  obvious  that 
there  will  be  a  voltage  drop  across  the 
condenser  C,  since  the  two  are  in 
series  to   ground. 


Coupling  condenser  can  be  represented 
as  a  series  AC  resistance. 


Tube  capacity  at  high  frequencies  be- 
comes a  shunt  AC  resistance. 


AC  resistance  of  coupling 
condenser 

Since  the  AC  resistance  of  this  con- 
denser varies  inversely  with  fre- 
quency, it  follows  that  the  voltage 
drop  across  it  is  inversely  proportional 
to  the  frequency.  The  voltage  drop 
will  be  least  at  high  frequencies  and 
greatest  at  low  frequencies.  If  the 
condenser  is  made  sufficiently  large 
so  that  at  the  lowest  frequency  to  be 
passed  by  the  radio  set,  the  AC  resist- 
ance of  the  condenser  is  very  small 
in  comparison  to  the  resistance  Rg, 
then  there  will  be  no  appreciable  loss 
of  low  frequencies  due  to  voltage  drop 
across  the  condenser. 

Since  it  is  the  ratio  of  the  two  re- 
sistances that  counts,  if  a  small  con- 
denser is  used,  a  large  grid  resistor 
must  be  employed.  If  it  is  essential 
that  a  low  value  of  grid  resistance  be 
employed,  then  the  condenser  must  be 


made  larger.  (The  maximum  value  of 
grid  resistor  that  can  be  used  depends 
on  the  type  of  tube,  whether  fixed  or 
self  bias  is  employed,  and  other  con- 
ditions usually  of  less  importance.) 

Tube  shunt  capacities 

Another  condition  which  may  occur 
is  when  the  tube  capacity  Cgk  is  large 
and  a  high  value  of  grid  resistor  is 
employed.  At  high  frequencies  the  AC 
resistance  of  Cgk  may  be  low  enough 
to  act  as  a  shunt  across  the  resistor 
Rg.  This  means  that  the  parallel  im- 
pedance of  the  two  may  be  appreciably 
less  than  the  value  of  Rg  alone.  As 
was  pointed  out  in  the  case  for  low 
frequencies,  the  voltage  fed  to  the  grid 
of  the  amplifier  tube  is  dependent  upon 
the  ratio  of  the  AC  resistance  of  the 
coupling  condenser  and  series  resistance 
to  ground.  If  the  parallel  impedance  of 
Rg  and  Cgk  is  reduced  appreciably  at 
high  frequencies,  then  the  high  fre- 
quency response  of  the  stage  is  re- 
duced. The  circuit  for  this  case  Is 
shown  in  Fig.  3. 

If  Rg  is  of  a  low  enough  value  so 
that  Cgk  has  negligible  shunting  ef- 
fect at  the  highest  frequencies  to  be 
reproduced,  then  there  will  be  no  dis- 
crimination against  the  higher  fre- 
quencies. 

It  is  interesting  to  note,  that  for 
best  low-frequency  reproduction  and  a 
given  value  of  C,  a  high  ohmage  grid 
resistor  may  be  desirable;  while  to 
eliminate  the  effect  of  the  tube  shunt 
capacity,  a  low  value  of  grid  resistor 
may  be   desirable. 

Another   way   to   state   the   relation- 


"B"    is    a   rearrangement   of   "A"    to 

show  how  feedback  to  the  grid  exists 

when  the  cathode  by-pass  condenser  is 

not  large  enough. 


40 


Radio  Today 


^ush-button 

PUTESIISS 


"\ 

ON    DISPLAY  AT  THE 

o 

PARTS  SHOW 

p 

OR  SEE   IT  AT  YOUR 

V 

JOBBERS 

FOR  1939  SERVICING 


Mutual 
Conductance 
»\  Per  Cent  Seal* 


MODEL  1615 

•  Dynamic  Mutual  Conductance 
Tube  Tester  only  with  Push- 
Button  testing.  Same  tube  tester 
circuit  and  push-button  panel  as 
Model  1616,  but  for  tube  testing 
only.  Complete  with  all  necessary 
accessories. 


Rotating 
Chart  Show! 
Correct  Buttons 
To  Push 


YNAMIC 
UTUAL 
CONDUCTANCE 


Model  1616 
$7334 

Dealer  Price 


Tub*  Tester  and  Volt-Ohm-Milliammeter 


This  mit  Trlplett  model  Inciiriio- 
ntes  two  revolutionary  advance- 
ment* In  tube  tenter  design.  First, 
*u«h-button  control  given  a  nnv 
of  (Implication.  The  buttons 
ire  elenrly  marked  on  churl  nt  base, 
list  rotate  the  chart  to  the  tube  to 
tested— then  the  button  to  push 
Indicated  In  line  under  each  row 
•f  push  buttons.  What  could  be 
ilmplerl 

The  second  revolutlonnry  Improve- 
ment     l»     the     arrangement     of     the 
ensuring    circuit    of     the    dynamic 
utnal   conductance   test   for   nmpli- 
ers     and     power     tubes.       The     tube 
•sted      not     only     shows     GOOD     or 
All    but    the    percentage    of    mu    to 
I     Good    Condition  Is   nl«»  in- 
li.ntiil.     In  critical  sets  this  permits 
he    service    dealer   to    pick    his    tubes 
lib  confldence.  .  .  .  Diodes  and  rec- 


tifiers are  tested  for  emission  ac- 
cording to  the  lntest  approved 
engineering  standards.  (ins  and 
Ballast   tube  tests   Included. 

Rotate  chart  to  Volt-Ohm-Milll- 
nmmeter  settings — push  button  for 
D.C.  scale t  0-10-50-250-600-1000  Volts 
nt    10IM)    Ohms    per    Volt;    0-10-60-260 

M.A.i      .2      Ohms 500      Ohms — 30O.00O 

Ohms 1%    Megohms 3    Megohms; 

0-10-00-300-500-1000  A.  C.  Volts  at 
400  Ohms  per  Volt;  decibel  chart 
furnished  to  42  db's.  (  Oh  111  met  it  Is 
line  pt>wered  nnd  provision  is  made 
for  using  batteries  If  desired.)  I  *,•» 
plug-In  type  rectifier,  simplifying  re- 
placement In  case  of  unintentional 
ditjmige. 

Installed     in    attractive,     all-metnl 
case  with  lustrous  finish.    Ilemovnble 
rot  er.      For   portable    or   counter    use 
sloping  panel. 


Dealer  Price 


$63.34 


MODEL  1610 

•  Emission  Type  Tube  Tester 
with  Push-Button  testing.  Has  new 
R.M.A.  approved  circuit  with  every 
essential  for  dependable  emission 
test  on  all  type  tubes.  Testing 
greatly  simplified  by  Triplett  push- 
button testing.  Installed  in  metal 
case  with  removable  cover,  of  com- 
pact size;  complete  with  all  neces- 
sary accessories.  An  accepted  test 
for  practically  all  tubes. 
Dealer  Price   $39.00 


MODEL  1611 

•  Emission  Type  Tube  Tester 
with  Push-Button  Testing  and 
Volt-Ohm-Milliammeter.  Similar  to 
Model  1610  above  described  except 
Volt  -  Ohm  -  Milliammeter  added. 
Ranges  similar  to  those  of  Model 
1616.    Dealer  Price $49.50 


THE    TRIPLETT    ELEC.    INSTRUMENT    CO. 
196   Harmon   Dr.,    Bluflton,    Ohio 

Please    send    me    more    information    on 
I  □  Model  1616  □  Model  1615 

I  Q  Model  1610  D  Model  1611 


June,  1938 


ship  is,  that  the  grid  resistor  should 
be  low  enough  so  that  the  tube  shunt 
capacities  do  not  reduce  the  high  fre- 
quency response,  and  the  coupling 
condenser  C  should  be  large  enough 
so  that  the  desired  bass  frequencies 
are  passed. 

Simple  test 

The  test  for  proper  relationship  of 
coupling  condensers  and  resistors  in 
a  resistance  coupled  stage  is  quite 
simple.  If  it  is  suspected  that  the 
values  are  not  proper,  an  audio  fre- 
quency oscillator  having  a  range  from 
50  to  10,000  cycles  can  be  connected  to 
point  A.  If  the  output  of  the  amplifier 
stage  is  not  constant  oyer  the  desired 
range  of  frequencies,  try  connecting 
the  oscillator  to  point  B.  If  the  output 
of  the  amplifier  then  becomes  flat,  the 
frequency  discrimination  lies  in  the 
input  circuit  coupling  network.  (A 
similar  test  can  be  made  in  trans- 
former-coupled stages  by  connecting  the 
oscillator  output  to  first  the  primary 
and  then  the  secondary  of  the  audio 
transformer.) 

If  frequency  discrimination  still 
persists  even  when  the  oscillator  is 
connected  to  point  B,  it  follows  that 
it  is  caused  by  circuits  other  than  the 
input.  (If  the  output  of  the  audio  os- 
cillator does  not  remain  constant  with 
changes  in  frequency,  a  copper  oxide 
meter  can  be  connected  across  the  out- 
put of  the  oscillator  and  the  output 
control  manipulated  to  maintain  con- 
stant output.) 

Other  sources  of  discrimination  are 
cathode   circuit  degeneration  and   that 


caused  by  the  output  transformer  or 
coupling  network.  Cathode  type  de- 
generation is  usually  caused  by  too 
small  a  bypass  condenser  across  the 
cathode  resistor  and  makes  itself 
known  through  a  reduction  in  the  bass 
response  of  the  amplifier  stage,  because 
part  of  the  output  voltage  feeds  back 
to  the  grid  circuit  and  cancels  part  of 
the  input  voltage,  as  shown  in  Fig.  4. 
If  the  bass  response  comes  up  to 
normal  when  the  cathode  bypass  con- 
denser is  increased  in  size,  it  follows 
that  its  original  size  was  too  small. 

Of  course,  when  taking  the  fre- 
quency characteristics  of  any  radio  set 
amplifier,  the  frequency  characteristic 
of  the  speaker  should  be  taken  into 
account.  A  six-inch  unit  will  not  re- 
produce 70  cycles  and  to  attempt  to  do 
so  is  a  waste  of  time  and  materials. 
Likewise  a  selective  superhet  receiver 
will  not  pass  6,000  cycles  in  its  I.F. 
system  and  to  try  for  such  audio  re- 
sponse is  unwise. 

DYNAMIC  VS.  GAIN  TESTING 

Since  numerous  radiomen  have  in- 
quired as  to  what  the  difference  is  be- 
tween dynamic  radio  testing  and  stage- 
by-stage*  or  gain-testing**,  Radio  To- 
day's Service  Editor,  Vinton  K.  Ulrich, 
explains  it  as  follows. 

Dynamic  radio  testing  is  based  on 
the  idea  that  for  proper  operation,  the 
radio  set  must  operate  properly  for  all 
conditions  imposed  by  the  broadcast- 
ing signal.  The  set  must  reproduce  all 
the  notes  or  frequencies  that  it  could 
when  the  set  was  new,  and  must   de- 


liver adequate  output  with  a  minimum 
of  distortion.  Also  the  set  must  have 
essentially  equal  or  better  sensitivity 
and  selectivity  it  had  when  it  left  the 
factory. 

Dynamic  testing  differs  from  stage- 
by-stage  or  gain-testing  in  that  in  ad- 
dition to  locating  the  stage  where  the 
trouble  lies,  it  will  show  the  service- 
man what  part  or  element  of  the  stage 
is  defective.  Mere  sensitivity  testing 
just  tells  the  serviceman  that  there  is 
not  sufficient  gain  in  the  stage.  It  does 
not  take  into  account  such  factors  as 
distortion,  overloading,  power  handling 
capability,  and  a  host  of  other  factors 
important  to  proper  operation  of  the 
set. 

As  stated  by  Rider  in  March,  1937, 
sensitivity  testing  will  localize  the  de- 
fects to  a  single  stage.  From  then  on 
the  conventional  testing  methods  are 
used.  In  dynamic  testing,  the  applica- 
tion of  a  definite  procedure  of  testing 
will  show  in  just  what  part  of  the  cir- 
cuit the  trouble  lies.  Distortion  caused 
by  an  improper  load  impedance  will 
show  itself  as  such  and  not  merely  as 
distortion  from   causes  unknown,  etc. 

The  test  procedure  as  developed  will 
show  how  to  use  existing  test  equip- 
ment, how  to  make  circuit  connections, 
how  to  interpret  various  results  such 
as  cathode  ray  images  and  various  au- 
dible signals.  A  detailed  step-by-step 
procedure  is  being  developed  for  the 
radio  serviceman  using  both  the  scope 
(visual)  and  audible  analysis. 


*Philco  Serviceman. 
**Why    Sensitivity    Testing,    Advantages    of 
Gain  Per-Stage      Measurements      in      Localising 
Trouble,   by  John   F.    Rider,   in   Successful    Ser- 
vicing,   March,    1937. 


SENTINEL-ERLA  Model  88BE 


ip 


RADIO 
TODAY 


IF  PEAK   465  KC 


LOUIS-SCHMELING  TITLE 
BOUT  BROADCAST  JUNE  22 

Radio  listener  interest  for  June  will 
reach  a  peak  on  the  22nd  at  10  p.m. 
EDST,  when  NBC  broadcasts  a  blow- 
by-blow  account  of  the  world's  cham- 
pionship fight  between  Joe  Louis  and 
Max   Schmeling. 

The  bout  will  be  aired  over  one  of 
the  most  extensive  webs  ever  hooked 
up  for  a  sport  event.  To  radio  stores 
it  means  a  choice  spot  for  extra  sales 
of  personal  sets,  and  a  chance  for  spe- 
cial promotions  on  tube  replacements. 

Some  manufacturers,  notably  Hy- 
grade  Sylvania,  have  already  made 
special  "fight"  display  material  avail- 
able to  dealers  and  servicemen. 


DETROLA  CONVENTION 
JUNE  27-28 

First  annual  "National  Jobber-Dis- 
tributor" meeting  to  be  held  by  De- 
trola  is  set  for  June  27  and  28  at  the 
Ft.  Shelby  Hotel,  Detroit,  Mich. 

Sales  plans  and  merchandising  fea- 
tures of  the  new  1939  line  will  be  in- 
troduced by  sales  manager  J.  J.  Davin 
Also  planned  is  a  "dramatic  Pee  Wee 
demonstration,"  to  be  staged  by  Ed 
McCarthy,  New  York  and  New  England 
division  representative  for  Detrola. 


NEW  BOOKLETS 


The  RCA-Victor  Record  Catalog  has 
been  improved  and  enlarged  in  a  re- 
cent re-issue.  It  contains  80  addi- 
tional pages,  new  record  listings,  new 
classifications,  a  4-page  pronunciation 
table,  new  features  on  record-playing 
equipment,  etc. 

Samson  Safe-flex  rubber-bladed  fans 
are  featured  in  a  new  booklet  released 
by  Samson  United  Corp.,  Rochester, 
N.  Y.  Complete  merchandising  set-up 
and  all  fan  specifications  are  included. 

"The  Importance  of  Good  Hearing" 
is  the  title  of  a  feature  booklet  issued 
by  Western  Electric  Co.,  an  elaborate 
24-page  discussion  of  the  ortho-technic 
model  Audiphone. 

Ideas  and  profit  suggestions  for  mer- 
chandising the  Kisco  Cool-CIRCLE- 
Ator  table  are  presented  in  a  new 
photo-manual  booklet  released  by  the 
Kisco  Co.,  4414  W.  Papin  St.  St..  Louis, 
Mo. 

Free  amplifier  catalog,  No.  600-C 
has  been  released  by  Thordarson  Elec- 
tric Mfg.  Co.,  500  W.  Huron  St.,  Chi- 
cago. Six  models  with  outputs  ranging 
from  8  to  60  watts  are  shown.  The 
catalog  contains  technical  data,  general 
information,  illustrations  and  prices  of 
speaker  and  portable  cases,  etc.  Avail- 
able either  from  the  jobber  or  the  fac- 
tory. 

Radio  Today's  cover  photo  this  issue 
is  by  Walter  Engel.  Corkscrew  picture 
on  page  18  is  by  Charles  Phelps 
Cushing. 


*  Stancor's  new  Service  Guide 
No.  125,  a  32-page  manual,  is  now 
being  issued  by  jobbers  or  from 
Standard  Transformer  Corp.,  1500 
N.  Halsted  St.,  Chicago.  It  contains 
listings  of  over  2,800  sets,  with 
transformers  and  chokes  to  service 
them;  it  gives  the  tube  set  up  on 
all  receivers  listed  and  other  miscel- 
laneous information. 

*•  "Bakelite  Laminated"  is  the 
subject  of  a  new  booklet  available 
free  from  Bakelite  Corp.,  247  Park 
Ave.,  New  York  City.  The  48-page 
publication  has  illustrated  material 
on  the  individual  physical,  elec- 
trical and  mechanical  properties  of 
laminated  sheets,  tubes  and  rods. 

*  Forthcoming  from  Raytheon 
Mfg.  Co.,  144  Willow  St.,  Waltham, 
Mass.,  is  a  new  bulletin,  D148-71-F, 
on  automatic  voltage  regulators.  It 
includes  specific  applications  and 
tells  how  to  select  the  regulators  for 
general  use,  and  contains  full  infor- 
mation on  electrical  characteristics, 
dimensions,  stock  ratings,  and 
prices.  Copies  will  be  mailed  free 
on  request. 

*  The  96-page  set  of  supplement 
sheets  for  Alfred  A.  Ghirardi's 
Radio  Field  Service  Data  Book 
carries  a  new  and  revised  list  of  in- 
termediate peak  frequencies  of  all 
superhets  made  in  the  U.  S.  today. 
This  includes  272  makes  and  11.500 
different  models. 

+  "How  Radio  Stations  Use  In- 
stantaneous Recordings  to  Make 
Money,  Sell  Time,  and  Promote  Op- 
erating Efficiency"  is  the  title  of  a 
new  booklet  released  by  Presto  Re- 
cording Corp.,  139  W.  19th  St.,  New 
York  City. 

*  "Oscillograph- Wobbulator  Mod- 
el 77 — Your  Key  to  Successful  Ser- 
vicing" is  described  and  illustrated 
in  a  new  folder  issued  by  Triumph 
Mfg.  Co.,  4017  W.  Lake  St.,  Chicago, 
111. 

*  The  new  engineering  bulletin 
No.  38,  a  28-page  booklet  giving 
complete  information  on  flexible 
shafts  for  remote  control,  is  avail- 
able from  S.  S.  White  Dental  Mfg. 
Co.,  Industrial  Division,  10  E.  40th 
St.,  New  York  City. 

*  A  standard  specification  data 
folder  on  loudspeakers,  66  models  of 
them,  (of  which  28  are  permanent 
magnet  types)  has  been  released  by 
the  Magnavox  Co.,  Ft.  Wayne,  Ind. 
It  is  in  tabular  form  and  includes 
two  new  heavy  duty  speakers. 
Copies  will  be  sent  to  those  asking 
for  folder  R17. 

*  Copies  of  the  new  RCA  TT-3 
Transmitting  Tube  Manual  cover- 
ing air-cooled  types  are  now  avail- 
able from  distributors  or  by  send- 
ing 25c  to  the  Commercial  Engi- 
neering Section,  RCA  Radiotron 
Division,  RCA  Mfg.  Co.,  Inc.,  Har- 
rison, N.  J. 

*  American  Screw  Co.,  Provi- 
dence, R.  I.,  has  issued  a  bulletin 
on  "a  new  method  of  fastening  that 
gives  every  worker  in  the  electri- 
cal industry  a  third  hand."  The 
Phillips  reressed-head  screw  is  fea- 
tured. 


B  E  W  A  R  E 

IMITATIONS 


There  is  only  ONE 


POPULAR  throughout  America 
for  its  outstanding  construction 
and  quality,  our  SUPERIOR  Phono- 
graph Needle  is  being  imitated. 
Though  the  imitation  is  similar  in 
shape,  it  obviously  lacks  the  fine 
polish  and  reproducing  quality  of 
our  product.  Re  sure  vou  sell  SU- 
PERIOR  RECOTON   because   .   .   . 

1.  Made    of    special    steel    alloy, 
highly  polished 

2.  Each  needle  carefully  inspected 
and  packed 

3.  TEN    or    more    good    playings 
per  needle 

4.  Minimum   record  tvear 

5.  Surface    noise    practically   NIL 

• 
"We    iuvite   comparison   .   .   .   send 
at    once    for    samples   and    prices 

RECOTON  Corporation 

178  Prince  Street,  New  York,  N.  Y. 


REMEMBER- 

Whenever  you  are  asked  to  look  at 
tricky  circulation  comparisons,  re- 
member this: 

...  a  straight-forward,  side-by-side 
comparison  will  show  that  RADIO 
TODAY  has: 


22,000 
15,681 


GUARANTEED 
(ABC) 

PAID, 

as  of  March,  1938 


93%  of  the  total  circulation  goes  to 
buying  power  groups. 

Greatest   increase   in    paid   subscrip- 
tions. 

Highest    percentage   of    subscription 
renewals. 

Lowest    rate    per    thousand    readers. 

Largest  and  most  experienced  edi- 
torial staff — under  the  direction  of 
Dr.  O.  H.  Caldwell,  former  Federal 
Radio  Commissioner. 


RADIO 
TODAY 


June,  1938 


43 


THE 
PREMAX 

VERTICAL 
ANTENNA 

brincjs: 

STRONGER  SIGNALS 
LESS  NOISE 

with. 

AN  ECONOMY  OF 
SPACE 

KJO  overhead  or  un- 
sightly  guy   wires 
— it's  as  modern  as  to- 
morrow I 

Constructed  of  tubular 
steel  which  telescopes 
to  6-foot  length,  Pre-         Mifjj'ivJtf.M 
max  Safety  Lock  per- 
mits erection  to  any  height  up  to  24  feet. 
Complete,  ready  to  install    with  4-foot  ground 
post   and   insulator  unit.    Just  the  thing   for 
sightly,  efficient  antenna  erection. 

Illustration  shows  ground  type  mounted  with 
RCA  Antenna  Coupling  Unit  for  use  with 
RCA  Magic  Wave  Antenna.  Also  available 
in  roof  type. 

Ask  your  jobber  or  write  today  for  prices 
and  complete  details. 


Pre  max  rnoaucrs 


Division  Chisholm-Ryder  Co.,  Inc. 

3846  Highland  Avenue       Niagara  Falls,  N.  Y. 
44 


MORE  NEW  THINGS 


Inca     Climatite    transformers 

*  Radio  transformers  for  use  in 
regions  with  extremely  high  humid- 
ity. Low  weight,  small  size.  Im- 
pregnating compound  is  an  excel- 
lent conductor  of  heat  as  well  as 
having  resistance  to  moisture. 
Available  in  both  audio  and  power 
types.  Inca  Mfg.  Div.,  Phelps 
Dodge  Copper  Products  Corp.,  2375 
E.  27th  St.,  Los  Angeles,  ualif  — 
Radio  Today. 


Push-button   signal   generator 

*  Radio  service  oscillator  hav- 
ing push-button  control  of  5  I.F. 
frequencies  which  are  used  in  90 
per  cent  of  all  the  sets.  Five  r.f. 
frequencies  take  care  of  broadcast 
band  alignment.  Air  type  trimmers 
and  permeability-tuned  iron-core 
coils  provide  freedom  from  drift. 
On  manual  tuning,  oscillator  covers 
85  to  15,000  KC  on  fundamentals. 
Electronic  frequency  modulator  in- 
cluded. Model  582  A— net  $66.95. 
Supreme  Instruments  Corp.,  Green- 
wood. Miss. — Radio  Today. 


Spark   plug   suppressors 

*  Molded  bakelite  carbon  spark 
suppressors  for  reducing  ignition 
interference.  Model  S19  is  a  5000 
ohm  unit  which  fits  onto  stud  on 
top  of  plug.  Type  T20  is  a  10.000 
ohm  unit  for  use  at  the  distributor. 
List  30  cents  for  either  type.  Con- 
tinental Carbon  Co.,  13900  Lorain 
Ave.,  Cleveland,  Ohio — Radio  To- 
day. 


Stromberg  crystal  pick-up 

*  Replacement  type  of  crystal 
pick-up  for  use  with  Stromberg 
models  140-P,  145-P,  145-SP,  160-P 
combinations.  Changeover  is  sim- 
ple. Complete  with  base,  arm,  crys- 
tal unit,  and  3-prong  plug.  In- 
structions included.  Stromberg- 
Carlson  Telephone  Mfg.  Co.,  100 
Carlson  Rd.,  Rochester,  N.  Y. — 
Radio  Today. 


A  &  B  battery  eliminator 

*  AC  operated  power  supply  for 
2-volt  farm  radio  sets.  Fully  filtered 
2-volt  filament  and  B  power  sup- 
plies. Meter  for  adjusting  filament 
voltage.  Can  be  used  with  any  set — 
hum-free  operation.  Draws  only  30 
watts  with  a  7-tube  set.  Tapped  B 
eliminator  supplies  all  commonly 
used  voltages.  Electro  -  Products 
Labs.,  166  E.  Erie  St.,  Chicago,  111. 
— Radio  Today. 


Push-button  auto  radios 

*  Two  push-button  auto  radio 
models  have  been  added  to  the 
RCA  line.  Model  9M1  is  a  5-tube 
superhet  listing  at  $24.95.  9M2  is 
a  6-tube  set  with  a  3-gang  con- 
denser and  stage  of  r.f. — list  $29.95. 
Station  set-up  is  easy  and  does  not 
require  any  tools.  RCA  Mfg.  Co., 
Cooper  St.,  Camden,  N.  J. — Radio 
Today. 


Low-cost  power  transformers 

+  Line  of  filament  and  plate 
transformers  for  radio  and  elec- 
tronic fields.  Ratings  up  to  200  V. 
A.  Combination  plate  and  filament 
transformers  for  the  latest  tubes. 
Filament  transformers  also  avail- 
able. Filter  reactors  have  double 
winding  which  can  be  connected  in 
series  or  parallel.  Top  or  sub-panel 
mounting.  Ferranti  Electric  Co.,  30 
Rockefeller  Plaza,  New  York,  N.  Y. 
— Radio  Today. 


Radio  Today 


INTERNATIONAL   RESISTANCE   COMPANY 

403  NORTH  BROAD  STREET.  PHILADELPHIA.  PA 

In   Canada,    187  Duchess   Street,   Toronto,   Ontario 

MAKERS    OF  RESISTANCE   UNITS  OF  MORE   TYPES,  IN   MORE  SHAPES.  FOR 
MORE  APPLICATIONS  THAN  ANY  OTHER   MANUFACTURER   IN  THE  WORLD 


June,  1938 


45 


SERVICING  NEW  SETS 


TUNING  EYE  TROUBLES 

When  the  tuning  eye  closes  or  over- 
laps, almost  without  exception,  this  is 
due  to  variations  in  characteristics  of 
the  6E5  tube,  and  is  corrected  by  selec- 
tion of  a  suitable  tube,  advises  Strom- 
berg-Carlson. 

First  of  all,  make  sure  that  the  6E5 
tube  is  not  "soft"  or  "gassy,"  causing 
a  blue  glow  in  the  lens  of  the  tube 
which  can  be  seen  by  looking  across 
the  tube  in  a  dim  light. 

Some  "hard"  tubes  are  also  unsuit- 
able. Any  tube  drawing  in  excess  of 
5  mils  plate  current  in  the  receiver  cir- 
cuit (as  measured  by  a  set  analyzer, 
not  a  tube  analyzer)  should  not  be 
used.  The  percentage  of  such  tubes 
is  rapidly  being  reduced  by  the  tube 
manufacturers. 

Occasionally  the  6E5  tube  may  be 
suitable  and  the  difficulty  caused  by 
excessive  plate  current  in  the  1y~K.7  tube 
used  in  the  I.F.  stage. 

If  the  shadow  on  the  target  of  the 
6E5  tube  does  not  reduce  on  nearby 
signals 

(a)  Check  the  aerial  and  ground  con- 
nections for  open  lead-in,  insuffi- 
cient pick-up,  high  resistance 
joints,  etc. 


(b)  Check  sensitivity  control  knob  if 
there  is  one  and  increase  sensi- 
tivity. 

(c)  Check  for  a  faulty  tube  in  the 
R.F.  system,  causing  low  AVC  volt- 
age. 

(d)  Check  for  a  grounded  cathode  bias 
resistor  at  R.F.  or  I.F.  socket. 

A  LETTER  TO  SERVICE 
CUSTOMERS 

Too  rarely  does  the  radio  service- 
man take  his  customer  into  his  confi- 
dence and  write  him  fully  explaining 
the  difficulties  in  finding  trouble  in  a 
modern  radio  set.  Clark  Radio  of 
Granville,  Ohio,  calling  itself  "Ohio's 
largest  radio  shop,"  has  prepared  a 
form  letter  which  it  sends  to  customers 
who  have  had  repair  work  done.  This 
letter  covers  a  wide  range  of  cases  and 
contains  questions  which  aid  in  trac- 
ing troubles  which  may  appear  later. 
Here  is  the  letter: 

Dear  Customer: 

Intermittent  radio  trouble  is  the 
meanest  type  to  repair  as  a  rule,  es- 
pecially that  type  that  cuts  out  only 
occasionally.  Often  an  intermittent  ra- 
dio that  has  been  chronic  at  the  home, 


works  perfectly  here  at  the  shop,  pos- 
sibly due  to  jar  in  transit,  tempera- 
ture or  humidity  changes,  etc.  Repair- 
ing a  set  of  this  type  often  necessi- 
tates a  certain  amount  of  "hide  and 
go  seek"  labor,  coupled  with  consid- 
erable patience  on  our  part  as  well  as 
that  of  the  customer. 

When  a  set  of  this  type  fails  to  de- 
velop trouble  here  at  the  shop  after 
a  duration  test  run,  we  usually  replace 
certain  parts  that  we  are  suspicious 
of  and  after  another  test  run,  if  no 
trouble  has  shown  itself,  we  return  the 
set  to  the  customer.  Of  course,  in  this 
procedure  we  are  not  sure  we  have 
corrected  the  trouble,  and  must  enlist 
your  aid  in  detecting  any  further 
trouble  as  it  would  be  practically  im- 
possible for  us  to  operate  and  monitor 
each  intermittent  case  for  more  than 
a  few  hours. 

Your  set  has  operated  without  show- 
ing any  trouble  here  at  the  shop  for 

hours.    If  it  gives  any  trouble 

after  being  returned  please  call  us  im- 
mediately and  aid  us  by  answering 
the  following  questions  as  fully  as 
possible: 

Does  set  cut  out  periodically? 

Does  reception  fade  out  or  snap  off? 

Does  adjusting  dial  or  volume  con- 
trol agitate  trouble? 

Does  turning  off  or  on  a  light  in  the 
home  affect  it? 

Is  the  fading  accompanied  by  a 
whistle,  screech,  hum,  or  distor- 
tion from  the  loudspeaker? 

(To  page  48) 


WESTINCHOUSE  Models  WR-228  &  WR-328 


[J]«-sw  oso 

\_   OSC.  SERIES 


UNDER     SIDE    OF    CHASSIS 


BEGINS 


H  OE     R     E 


It  is  Sylvania's  firm  belief  that  a  radio  tube  can  be  only  as  good  as 
the  materials  put  into  it. 

That  is  why,  at  the  Sylvania  factory,  quality  begins  here— under 
this  inspector's  microscope.  Every  element  to  be  used  in  making  Syl- 
vania tubes  is  subjected  to  rigid  examination  .  .  .  must  be  tested  and 
pronounced  "okay"  before  acceptance  from  sources  of  supply. 

Quality  counts— so  sell  Sylvanias.  They'll  build  customer  good- 
will and  bigger,  steadier  profits  for  your  business.  Hygrade  Sylvania 
Corp.,  Emporium,  Pa.  Cable  HYSYLVANIA,  N.  Y.  Also  makers  of 
famous  Hygrade  Lamp  Bulbs. 


S  Y  L 


N  I  A 


SEE  US  AT  204-06  AMPERE  AVENUE,  NATIONAL  RADIO  TkAPE  SHOW.  HOTEL  STEVENS.  CHICAGO 


June,  1938 


47 


DON'T  MISS 
SEEING 
PRESTO 


TH  E 

NEW 


CONSOLE 

MODEL 

RECORDING 

PHONOGRAPH 

• 

ON  DISPLAY 

FOR  THE 
FIRST  TIME 

at  the 

NATIONAL 
TRADE  SHOW 

213  FARADAY  AVE. 


^%-lso  the  complete 
line  of  Presto  equipment 
and  discs  for  commercial 
and  home  recording. 


PRESTO 


RECORDING 
CORPORATION 
137  W.  19th  ST.,  NEW  YORK,  N.  Y. 


<oW 


orld's  Largest 
Manujacturers  oj 
Instantaneous  Sound 
Recording  Equipment 


SERVICING 


Have  the  aerial  and  ground  connec- 
tions been  checked? 
Is    trouble    more    noticeable    during 

windy  weather? 
Do  you  notice  a  change  in  brilliancy 
of     the     pilot     light     during    the 
trouble? 
Do  you  notice  a  dimming  of  any  of 
the  tube  heaters  concurrent  with 
the  fading? 
Your  indulgence  and  patience  in  this 
case  will  be  appreciated  and  we  will 
strive  to  do   all  within  our  power  to 
bring  you  enjoyable  radio  service. 
Very  truly  yours, 

Clark  Radio. 


RCA  HI-FIDELITY  SET 

Designed  primarily  for  high-fidelity 
reception  from  local  stations,  the  RCA 
HF-1  has  no  short  wave  or  manual 
tuning  arrangements.  Station  selection 
is  provided  for  by  8  push  buttons 
which  operate  condenser  trimmers  in 
the  antenna  and  link  circuits  and  in- 
ductance trimmers  in  the  oscillator 
circuit. 

Chief  variation  in  the  set  is  found 
in  the  fidelity  control  and  its  associ- 
ated circuits  which  are  reproduced  on 
this   page. 

So  as  to  provide  sufficient  selectivity 
for  adverse  receiving  conditions,  a  se- 
lectivity control  is  provided  for  in  the 
I.F.  circuit.  This  same  control  also 
has  two  positions  for  phonograph  re- 
production. Position  1  illustrated  in 
audio  circuit  gives  minimum  high  fre- 
quencies since  a  .01  condenser  is  con- 


Circuits  of  the  fidelity  control  in  the 
RCA-Victor    HF-1     high-fidelity    set. 


nected  from  the  plate  of  the  first  audio 
amplifier  to  ground.  Position  2  dis- 
connects this  condenser  for  phono- 
graph reproduction,  thereby  giving 
maximum  high  frequency  response. 

In  positions  3  to  6,  inclusive,  the 
receiver  is  connected  for  radio  op- 
eration. The  I.F.  switches  are  drawn 
in  position  3  which  gives  maximum 
selectivity.  Note  that  the  coils  which 
provide  band-pass  action  are  shorted 
to  ground.  Also  the  audio  circuit 
switch  connects  a  .01  condenser  from 
the  plate  of  the  first  audio  tube  to 
ground,  decreasing  the  high-frequency 
response.  This  is  similar  to  position 
1  for  phonograph  operation.  (Note  that 
the  audio  switch  is  drawn  in  position 


This  service  bench,  designed  and  equipped  by  Weston,  will  be  awarded  as  first 
prize  in  Weston's  contest,  which  is  open  to  all  servicemen.     Details  on  page  58. 


48 


Radio  Today 


behind  the  condenser 

you  buy  . 


Special  vent:  allows  for  normal 
dissipation  of  harmless,  odorless 
electrolytic  vapor;  safety  under  all 
operating  conditions. 

Hi  -  formation  process:  affords 
higher  voltage  breakdown. 

Super-purity  cellulose  separator: 
extra  long  life. 

Hi-purity  aluminum  foil:  better 
D.  C.  leakage  recovery. 

Rigid  chemical  control:  uniform 
performance. 

Tubular,  compact  construction : 
ease  of  wiring  into  circuit. 

New,  varnished  protective  sleeve 
spun-over;  prevents  short-circuit  to 
container. 

FRFP  I     Out  new,  big  catalog  No. 
161     is     off     the     press! 
Write  for  your  copy  TODAY!  Cable 
Address:  "Cordu." 


BEHIND  theCornell-Dubilier  capacitor  you  buy  are  "shadowed" 
the  vast  resources  of  the  largest  organization  of  its  kind  in  the 
world — the  Cornell-Dubilier  Electric  Corporation.  Its  engineer- 
ing experience,  skill  and  ingenuity  are  concentrated  on  the 
building  of  dependable  capacitors — and  capacitors  alone. 

Typical  of  C-D's  superiority  are  the  new  type  BR  "Blue  Beavers." 
They're  "over -size"  in  quality,  but  "under-size"  in  physical 
dimension — designed  to  give  the  kind  of  service  you'd  expect 
from  larger,  more  bulky  units.  C-D  type  BR  "Blue  Beavers"  are 
ideal  replacement  filters — attractively  priced. 


TYPE  DT. 
"Dwarf  -  Tiger" 
Tubular  Paper 
Capacitors  Com- 
pact, moisture- 
proof,  non-induc- 
t  i  v  e  condensers 
that  are  the  finest 
and  most  univer- 
sally used  tubu- 
lars  available. 


TYPE   TLA.     NEW 

high  voltage  filter 
capacitors  impreg- 
nated and  filled 
with  DYKANOL 
(chlorinated  -  diph- 
enyl),  a  stable 
chemical  compound 
that  will  not  give 
off  free  chlorine  re- 
gardless of  voltage 
stress  or  tempera- 
ture. 


Products  of  the  World's  Oldest  and  Largest  Exclusive 
Manufacturer  of  Capacitors 


CORNELL-DUBILIER 

ELECTRIC    CORPORATION 

102.2.   Hamilton  Boulevard,  South  Piainlieid,  New  Jersey 


June,  1938 


49 


I 


C/Mi*ty 


AN  INSTRUMENT 
3    DESTINED   TO 
Revolutionize 
SERVICING!! 


Developed  in  John  F.  Rider's 
Successful  Servicing  Lab- 
oratories, to  fill  a  long-existing 
need  in  the  service  industry, 
the  Rider  Chanalyst  will 
soon  be  available  to  the 
service  engineer. 

The   Rider  Chanalyst    is    the    one 
instrument  which: 

1.  Has   universal   application  to  all 

types  of  receivers. 

2.  Provides  new,  uniform  method  of 

testing  for  all  servicemen. 

3.  Makes   possible   the   most   rapid 

analyzation  of  set  troubles. 

4.  Eliminates   the   difficulties   of   lo- 

cating troubles  in  intermittent 
receivers. 

5.  Enables     servicemen     to     make 

quick,    practical   estimates   in 
the  home. 

6.  Has  longer   life   as   a   useful   test 

instrument. 

7.  Is    remarkable    in    its    ease    of 

operation. 

8.  Is    priced    within    the    reach    of 

every    forward-going    service- 
man. 

The  Rider  Chanalyst  is, 
without  guestion,  one  of  the 
most  important  and  far-reach- 
ing service  developments  of 
the  last  ten  years.  The  amaz- 
ing results  obtained  through 
its  use  will  make  it  an  indis- 
pensable instrument  to  every 
progressive  serviceman. 


ftlDEW 


The 

Ctianal 


SERVICING 


1,  not  3.)  In  positions  3  to  6  the  audio 
switch  connects  the  diode  load  to  the 
audio  volume  control,  while  in  1  and 

2,  the  phono  jack  is  connected  to  the 
volume   control. 

In  position  4.  the  I.F.  switch  still 
shorts  the  closely-coupled  coils  to 
ground  providing  maximum  selectiv- 
ity. However,  the  audio  by-pass  con- 
denser is  removed  from  the  circuit, 
so  that  the  only  high-frequency  at- 
tenuation is  caused  by  the  I.F.  cir- 
cuits. 

Medium  selectivity  is  provided  by 
position  No.  5.  Note  that  only  the  bot- 
tom half  of  the  band-pass  coil  is 
shorted  to  ground.  Since  a  greater 
amount  of  side-bands  are  passed,  the 
high  frequency  response  of  the  set  is 
increased  slightly. 

Maximum  highs  are  provided  in  po- 
sition 6.  Note  that  the  full  section  of 
the  band-pass  coil  is  used  to  provide 
maximum  coupling  with  the  other  cir- 
cuits. In  this  position  the  selectivity 
is  at  a  minimum  and  a  maximum 
band-pass  action  is  obtained,  giving 
the  maximum  high-frequency  response. 

The  mechanical  arrangement  of  the 
6-position  switch  has  been  altered  to 
permit  a  more  understandable  circuit 
portrayal.  Otherwise  and  electrically 
the  circuit  is  identical  with  that  used 
in  the  set. 

ZENITH  PUSH-BUTTON  TUNING 

In  the  current  line  of  Zenith  auto 
radio  sets  two  types  of  push-button 
tuning  are  employed.  In  the  lower- 
priced  sets  using  a  2-gang  condenser, 
a  combination  of  condenser  and  induc- 
tance trimmers  are  used.  Since  the 
set  mounts  on  the  steering  post,  no 
remote  controls  are  needed.  Transfer 
from  manual  to  automatic  tuning  is 
accomplished  by  pulling  out  the  tuning 
knob  which  operates  the  change-over 
switch. 

The  circuit  for  this  set  (Model  5-M- 
294,  chassis  5530)   is  shown  in  the  ac- 


In  the  Zenith   5M294,   changeover  to 

automatic  is  accomplished  by  pulling 

out  the  manual  knob. 

companying  diagram.  Provision  is 
made  for  automatic  tuning  of  four 
stations.  In  the  automatic  position, 
the  tuning  condenser  is  disconnected 
and  a  set  of  trimmer  condensers 
shunted  across  the  antenna  coil.  A 
series  of  trimmer  inductances  and  a 
fixed  condenser  are  shunted  across  the 
oscillator  coil. 

Note  the  use  of  a  double-throw 
switch  for  position  1  in  the  antenna 
circuit.  Since  position  1  is  the  high- 
frequency  end  of  the  band,  provision 
is  made  to  disconnect  the  balance  of 
the  circuits  in  order  to  reduce  the 
stray  capacity  to  a  minimum.  This 
is  done  by  the  double-throw  switch, 
which  connects  trimmer  No.  1  into 
the  circuit  and  disconnects  the  rest 
of  the  switches. 

The  oscillator  circuit  is  the  usual 
one  used  with  trimmer  type  induc- 
tances. A  fixed  condenser  is  used  to 
tune  the  circuit  in  conjunction  with 
the  variable  trimmer  inductances. 

In  the  more  expensive  6-M-295  set 
(chassis   5650)    a   more   elaborate   sys- 


Three  sets  of  iron-core  trimmers  are  tuned  by  a  single  control,  thus  simplifying 

station  set-up 


50 


Radio  Today 


!'Q 


if  your  money 
is  tied  up  in 
radio  tubes 


Co 


you'll  want  to  know 
niore  about  Tung-Sol's  Consign- 
ment Plan,  under  which  the  dealer 
sells  first,  then  pays.  Thus  he  is 
guaranteed  against  losses  due  to 
slow  turnover,  obsolete  stock,  or 
price  declines. 

Because  Tung- Sol  dealers  are 
carefully  chosen  as  to  location  and 
qualifications,  each  is  assured  of 
his  share  of  the  business  as  well 
as  full  profit  from  every  sale. 

Responsible  dealers  and  service 
men  should  investigate  the  Tung- 
Sol  Consignment  Plan.  Write  to 
our  nearest  sales  office  today  to 
learn  whether    you   can    qualify. 

Radio  Trade  Show :  —  Booth,  110-112 
Marconi  Blvd.  Stevens  Hotel 

TUNG-SOL  LAMP  WORKS,  INC. 

Dept.  C  Radio  Tube  Division 


SALES  OFFICES:  Atlanta  .  Boston  .  Chicago 
Dallas  .  Denver  .  Kansas  City  .  Los  AngeleB 
Detroit  •  New  York  •  General  Offices,  Newark,  IN.  J. 


EVERY 

RADIO  DEALER 

Can  and  Should  Sell  1  to  10 
Room  Coolers  This  Summer 


NO  NEED  to  suffer  from  heat  or  humidity  this  summer,  when  the 
Plea santa  ire  Room  Cooler  offers  relief  at  such  low  cost  This  self- 
contained,  portable  air  conditioner  is  powered  by  a  refrigeration  plant 
many  times  larger  than  a  household  electric  refrigerator — yet  it  is  so 
compact  that  it  fits  in  the  window,  and  may  be  installed  in  a  few 
minutes.  It  is  entirely  adequate  for  the  average  bedroom  or  small 
office  of  200  square  feet  or  less. 

For  hot  weather  relief,  nothing  can  do  the  job  as  well  as  an  electric 
refrigeration  Room  Cooler.  In  this  field,  Pleasantaire  leads  because  it 
is  the  only  time-tested,  low  cost  unit  on  the  market 

IT  COOLS  by  electric  refrigeration 
DEHUMIDIFIES 
FILTERS  and  VENTILATES 
CIRCULATES,  Quietly 
REMOVES  STALE  AIR 
KEEPS  OUT  INSECTS 
Pleasantaire  Conditioning  is  Healthful  Air  Conditioning 

CORPORATION 

1623  Connecticut  Ave.  Washington,  D.  C. 


Pleasantaire  lists  at 

'  '! 

$199.50  f.o.b.  factory. 

Sales  are  direct  to  dealers 

at   liberal  profit -making 

saW 

discount. 

iii 

fli,*?^ 

■ 

■fc' f 

Write  today  for  The  Pleas- 

antaire Package  Plan,  com' 

plete  story  of  Room  Cooler 

™    : 

merchandising  for  the  ap- 

pliance dealer. 

June,  1938 


51 


Neon  Short 

TEST  and  SEPARATE 

CHECKS  on  all  ELEMENTS 

INCLUDING 

BALLAST    TUBE     TESTS 


Positively  Checks 
Radio  Receiving 
Tubes  According 
to  Latest  Recom- 
mendations o  f 
Tube  Engineers. 


New  Model  432-Only  $21.60 


•  Neon  Short  and 
Leakage  Test 


•    Line   Voltage 
Adjustment 


•    Uses  Triplett  •    Separate 

Direct  Reading  In-  Checks   on   All 

strument  (GOOD-  Elements 
BAD)  scale 

The  addition  of  a  neon  short  test 
and  provision  for  separate 
checks  on  all  elements  including 
ballast  tubes  brings  the  popular 
Readrite  Tube  Tester  right  up  to 
the  minute.  This  circuit  is  well 
known  for  its  thorough  reliabil- 
ity and  ease  of  operation. 

Complete  in  attractive,  sturdy 
quartered  oak  case;  suitable  for 
counter  or  portable  use.  Sloping 
etched  panel  of  silver  and  black. 

Other  Readrite  Tube  Testers 
Also  Are  Available. 


READRITE   METER  WORKS 

619  College  Ave.,   Bluffton,  Ohio 

Please  send   me   more  information   on 
□  Model   432        □  Other  Tube  Testers 


Name  . . 
Address 


City. 


MANUAL-AUTOMATIC 
CHANGEOVER 
SWITCH   RELAY 


ELECTRO-MAGNETS 
TO  OPERATE   STA. 
" SELECTOR . 
SWITCHES   ■ 


STATION   12       3      4       5  MANr 


PUSH   BUTTON    CONTROLS 


Remote   control    system    and    change- 
over relay  in  Zenith  auto  radio. 

tem  of  automatic  tuning  is  employed. 
The  set  employs  a  3-gang  condenser 
for  manual  tuning — and  on  automatic 
tuning  it  employs  three  tuned  stages 
using  trimmer  inductances.  Each  set 
of  three  trimmer  inductances  is  tuned 
by  a  single  adjustment  which  simpli- 
fies station  set  up. 

The  push  buttons  are  remotely  lo- 
cated from  the  chassis  and  electro- 
magnets are  used  to  operate  the  push- 
button switches.  Also  a  relay  is  used 
to  change  over  automatically  from 
manual   to  automatic  tuning. 

The  station  selecting  circuits  are 
shown  in  an  accompanying  diagram. 
Three  sets  of  trimmer  inductances  are 
used  in  place  of  the  usual  coils  In  the 
set.  The  change-over  switches  have 
been  relocated  in  Radio  Today's  circuit 
so  that  the  operation  may  be  more 
easily  understood.  A  switch  auto- 
matically cuts  out  the  usual  antenna 
coil  and  substitutes  the  trimmer  ar- 
rangement of  coils.  In  the  1st  de- 
tector circuit,  the  usual  coil  is  like- 
wise cut  out  of  the  circuit  and  trim- 
mer inductances  switched  in.  The  grid 
end  of  the  "manual"  coil  is  grounded 
for  automatic  operation. 

In  the  oscillator  circuit,  the  usual 
coil  and  condenser  system  is  discon- 
nected and  the  special  trimmer  oscil- 
lator circuit  used.  In  the  manual  po- 
sition, part  of  the  oscillator  coil  cir- 
cuit is  grounded. 

Trimmer  type  condensers  are 
shunted  across  both  the  antenna  and 
r.f.  trimmer  coils.  These  trimmers  are 
aligned  for  maximum  output  at  about 
1000  to  1100  KC  on  button  No.  2.  This 
adjustment  resonates  the  antenna  to 
the  automatic  tuning  unit. 

The  remote  push-button  control  cir- 
cuit controls  a  series  of  electro-mag- 
nets which  operate  the  station  selector 
switches    in    the    trimmer    inductance 


unit.  Five  stations  and  a  manual  but- 
ton are  provided.  The  wiring  of  this 
unit  is  shown  herewith.  When  any 
of  the  stations  are  selected  by  the  push 
buttons,  the  return  circuit  goes 
through  the  automatic  winding  on  the 
change-over  relay. 

When  the  manual  button  is  pressed, 
the  manual  winding  on  the  relay  is 
energized  and  the  relay  returns  the 
circuits  in  the  set  to  manual  opera- 
tion. The  tuning  condenser  then 
functions  as  usual. 

EMERSON  MIRACLE  TUNING 

In  the  Emerson  receivers  employing 
Miracle  push-button  tuning  only  a 
single  trimmer  adjustment  is  re- 
quired for  each  of  the  six  stations. 
This  feature  is  obtained  through  the 
use  of  fixed-tune  circuits  in  the  an- 
tenna stage  of  the  set. 

The  accompanying  circuit  is  taken 
from  the  AY-194  and  AY-195  models 
which  have  both  manual  and  auto- 
matic tuning.  Change-over  from  man. 
ual  to  automatic  is  accomplished  by 
the  wave-band  switch.  For  simplicity, 
the  manual  circuit  and  other  non-es- 
sential circuit  elements  have  been 
omitted. 


In  the  antenna  circuit  a  series  of 
fixed  condensers  are  used  to  tune  the 
antenna  coil  to  the  mid-point  of  the 
range  for  the  corresponding  push  but- 
ton. Note  that  no  condenser  is  used 
on  the  highest  frequency  push  button. 
The  coil  is  resonant  by  virtue  of  the 
distributed  capacity  of  the  coil  and 
stray   capacity   of   the   circuit   wiring. 

Double-pole  switches  are  employed 
in  the  oscillator  circuit,  to  connect  the 
trimmer  condensers  and  short  out 
various  portions  of  the  oscillator  coil. 
The  two  low-frequency  positions  em- 
ploy the  entire  winding  of  the  oscil- 
lator coil.  The  high-frequency  button 
uses  only  a  small  part  of  the  oscillator 
winding,  the  balance  being  shorted  to 
ground  from  the  second  tap.  The  three 
medium-frequency  positions  short  out 
only  the  bottom  portion  of  the  coil, 
being  connected  to  the  first  tap. 

The  actual  mechanical  arrangement 
of  the  station  selector  switches  varies 
from  that  shown  in  the  accompanying 
diagram.  However,  electrically  the  cir- 
cuit is  the  same. 


52 


Radio  Today 


KEY  TO  RADIO  PARTS  CITY 

(From  page  20) 

General  Industries  Co.  —  Allen  W. 
Fritzche,  Homer  Stephens,  H.  E. 
Moon — record  changers. 

Booth  209  Henry  St. 

General  Transformer  Corp. — Nathan 
Goldman,  Henry  Shafer,  Gerry 
Cole,  Fred  Carner,  Dan  Bittan, 
R.  M.  Campion,  Ben  Smith,  J.  M. 
Cartwright,  J.  K.  Heinemann,  E.  C. 
Edwards — replacement  transform- 
ers, sound  amplifier  kits,  transmit- 
ter kits,  including  "Pee  Wee"; 
amateur  transformers  and  chokes. 
Booth  101-103  Ampere  St. 

E.    I.    Guthman    &    Co.,    Inc. — B.    J. 

Funk,  E.  I.  Guthman,  S.  H.  Roth- 
schild, W.  C.  Jones,  I.  L.  Glerum, 
R.  Morris,  J.  Elliott,  E.  Janeczko, 
J.  B.  Rubin,  M.  Hess,  E.  Plank, 
H.  Lucke,  J.  Komidor,  C.  Sweet — 
textile  covered  and  Litz  wire,  pad- 
der  and  trimmer  condensers,  radio 
cabinets,  coil  winding  machinery, 
antenna  and  R.F.  coils,  I.F.  trans- 
formers and  cTiokes,  condenser 
banks  for  automatic  and  push  but- 
ton tuning. 

Booth   114  Marconi  Blvd. 

Hallicrafters,  Inc. — W.  J.  Halligan, 
R.  W.  Durst,  K.  W.  Miles,  L.  S. 
Toogood,  H.  S.  Hartley,  J.  J. 
Frendreis — complete  line  of  com- 
munications receivers  and  trans- 
mitters. .  .  .Booth  107-109  Bell  St. 


Hammarlund   Mfg.    Co.,    Inc. — L.    A. 

Hammarlund,  W.  W.  Jablon,  A.  E. 
Stevens,  L.  G.  Cushing — variable 
condensers,  coils,  I.F.  transformers, 
trimming  condensers,  coil  forms 
and  shields,  Super-Pro  receivers. 
Booth  207  Steinmetz  Ave. 

Hickok    Electrical    Instrument    Co. — 

L.  C.  McCarthy,  Robert  Williams, 
Walter  A.  Weiss,  J.  R.  Barnhard 
radio  service  equipment  and  me- 
ters  Booth  208  Henry  St. 

Howard  Radio  Co. — C.  B.  Shapiro, 
J.  F.  Riley,  H.  C.  Briggs,  H.  Kriss- 
man,  R.  B.  Nail,  E.  L.  Hollings- 
worth,  L.  Still,  J.  H.  Weymouth — 
amatuer  receivers. 

Booth  214  Marconi  Blvd. 

Hygrade  Sylvania  Corp. — C.  W.  Shaw, 
H.  P.  Gilpin,  Paul  S.  Ellison,  A.  L. 
Milk,  R.  P.  Almy,  A.  R.  Oliver, 
H.  C.  L.  Johnson,  H.  G.  Kronen- 
wetter,  Ralph  S.  Merkle,  M.  F.  Bal- 
com,  R.  M.  Wise,  W.  A.  Coogan, 
V.  M.  Graham,  Walter  R.  Jones — 
set-tested  radio  tubes  and  Model 
Service  Shop. 

Booth   204-206   Ampere   St. 

Hytron  Corp. — B.  A.  Coffin,  Fred  F. 
Sylvester,  G.  J.  Hallam,  R.  S. 
Briggs — radio  tubes. 

Booth  109  Edison  St. 

Indiana  Steel  Products  Co. — A.  D. 
Plamondon,  Jr.,  George  Klein,  C. 
A.  Maynard,  R.  A.  Smith,  Philip 
Smith — permanent  magnets. 

Booth  116-118  Marconi  Blvd. 

(To  next  page) 


THE  EXTRA  MONEY 

you  make  each  week  on  the 

NATIONAL  UNION  PLAN 


IS 


like 


MONEY  FOUND! 

...  do  as  thousands  of 
Service  Engineers  are 
doing  ...  get  FREE  EQUIP- 
MENT . . .  earn  more  money! 

You  can  benefit  by  the  experience  of 
thousands  of  your  fellow  Service  En- 
gineers who  are  cashinng  in  on  the 
National  Union  free  equipment  plan. 
These  men  have  proved  the  plan  is 
right.  They're  making  more  money 
because  they  can  do  more  work,  do 
it  right.  They  are  taking  advantage 
of  N.U.  quality  in  tubes  and  con- 
densers. They  don't  have  to  fear  cut 
price  "dumping"  of  N.U.  products. 
You  should  be  growing  with  these 
men!  Why  don't  you  start  now?  It's 
easier  than  ever  to  cash  in  now  that 
both  National  Union  Tubes  and  Con- 
densers apply  on  Free  Equipment. 
Ask  your  jobber  or  send  the  coupon. 

NATIONAL   UNION  TUBES  and  CONDENSERS 


7VEW! 

National  Union 

"CERAMITE" 

Condensers 


NO  EXPLOSIONS!  NO  SHORTS!  The  new 
N.U.  "Ceramite"  ceramic  shell  condensers 
are  the  "mighty"  midget  electrolytics  of 
the  industry  .  .  .  small  in  size  but  mighty 
in  quality,  performance  and  safety.  You 
can  rely  on  N.U.  "Ceramites"  as  you 
have  on  other  N.U.  products.  "Ceramites" 
have  many  scientific  advantages  yoa  will 
appreciate.     Buy    Them  —  Try    Them! 

They   apply   on    FREE 

EQUIPMENT  Contracts. 

Ask  your  Jobber! 


NATIONAL    UNION    RADIO    CORPORATION 

57   State   Street,    Newark,    N.   J.  RT-63S  . 

Who  is  the  nearest  N.U.  Jobber i 

Send  me  data  on  "Ceramites" | 

Name     | 

Address    I 

City State ' 


June,  1938 


53 


CRO  SELECTOR 


AUTOMATIC 
TUNING  UNIT 


j&ssM- 


CROWE    MOTOR-DRIVEN 
STATION   SELECTOR    FOR  AUTO    RADIOS 

7\7/->// »  f       A  combination  of  ALL  the  desirable  features  of  automatic 

tuning  for  auto  radios,  PLUS  positive  operation,  sturdy 

construction  and  easy  installation — can  be  added  to  old  or  new  receivers! 

EASY  ADJUSTMENT 

The  CROSELECTOR  is  set  or  re- 
set for  any  six  stations  in  just  a 
couple  of  minutes  —  without  tools 
or  equipment  of  any  kind.  Pres- 
ent remote  control  is  used  for 
setting  and  for  tuning  in-between 
stations. 

OTHER  FEATURES:  Change  from  automatic  to  manual  tuning  without  disturbing 
station  settings  and  without  a  "manual"  switch  button. 
CROSELECTOR  "turns"  directly  to  the  station — never 
across  the  dial  and  back  again.  Controlled  speed  pre- 
vents damage  to  tuner  or  radio.  No  damage  if  several 
buttons  are  pushed  at  once. 
■  _  Selector    switch    can    be    placed    on    instrument 

'0>    A/         panel,  under  panel  or  on  steering  column.  Dupli- 
;_  s^a  '\      cate  selector  switch  can  be  installed  in  rear  of 
*    r.        car,  if  desired. 

S\  Maximum  drain  only  5  amperes  for  3  sec- 

'J\  onds    while    actually    tuning.     No    current 

•<~         consumption    threafter.      Ask    for    Folder. 


EASY  INSTALLATION 

Universal  mounting  bracket  and 
unique  shaft  adapters  (on  the  motor 
unit)  are  quickly  matched  to  most 
popular  radios.  CROSELECTOR 
can  be  changed  to  another  radio 
and  first  set  restored  to  original  op- 
erating condition  whenever  desired. 


>*v 


o 


%. 


CROWE   NAME    PLATE 
AND  MANUFACTURING  CO. 

174!    GRACE   STREET- 

- —  I  LLINOIS 


£.$.&.<£.  $lan 


I- FACTORY  PURCHASING  POWER. 
2- COMPETITION -DEFYING  PRICES. 
3- MOST    COMPLETE    LINE    OF 

QUALITY  P.A.  EQUIPMENT. 
4  -  EXCLUSIVE  TERRITORY  . . .  SOLD 

ONLY  THROUGH  6.I.S.E.  AGENTS. 
5-FREE   ENGINEERING   AND         ^foSSife 

CONSULTING    SERVICE.  ^2?^ 

u  .    .        ,,    .-.•..■    ,    ,        ...  ,.,,     Stevens,   Room  221 8-A,  JuneTPl 

Have  you  joined?  Limited  territories  still    io    greet    member5    and    discu 
open!  Send  for  application   today!  "sound"  merchandising. 


CLARION  INSTITUTE  OF  SOUND  ENGINEERS 
69    WOOSTER    STREET,    NEW    YORK    CITY 


KEY  TO  RADIO  PARTS  CITY 


Insiiliiie  Corp.  of  America — Samuel  J. 
Spector,  Edward  J.  Cohen,  Alex  B. 
Heller,  J.  Backer,  James  Hermans, 
Royal  Smith  —  radio  parts,  auto 
radio  antennas,  amateur  equip- 
ment  Booth  201  Ampere  St. 

International  Resistance  Co. — Ernest 
Searing.  Dan  J.  Fairbanks,  Harry 
Ehle — full  line  of  fixed  and  vari- 
able resistance  units. 

Booth  211  Henry  Ave. 

Jackson  Electrical  Instrument  Co. — - 

Paul  F.  Jackson  and  E.  R.  Peel — 
tube  testers,  oscillators,  oscillo- 
graph, multimeters. 

Booth  201  Marconi  Blvd. 

J.  F.  D.  Mfg.  Co. — Julius  Finkel,  Al- 
bert Finkel,  J.  S.  Kornicker — auto 
antennas  and  accessories,  home 
radio  accessories 

Booth  216  Faraday  Ave. 

Jefferson  Electric  Co. — R.  J.  Horst- 
mann,  C.  P.  Kob,  A.  A.  Flick,  Jr., 
G.  W.  Ziegler,  R.  A.  Hoagland — - 
radio  transformers  and  chokes. 

Booth  209-211  Hertz  Ave. 

Jensen  Radio  Mfg.  Co. — Peter  L.  Jen- 
sen and  T.  A.  White  —  loud- 
speakers, reproducers  and  associ- 
ated apparatus. 

Booth  202-204  Coulomb  St. 

E.  F.  Johnson  Co. — E.  F.  Johnson, 
L.  W.  Olander,  Byron  E.  Hargrove, 
Fred  Hager,  Jr. — radio  transmit- 
ting equipment  including  con- 
densers, inductors,  sockets,  insula- 
tors, plugs  and  jacks,  shaft  coupling 
units,  antennas,  etc. 

Booth  111  Bell  St. 

Kato  Engineering  Co. — C.  H.  Jones, 
William  A.  Cliff,  Emlyn  L.  Jones, 
Edward  J.  Coffee — 110-volt  AC 
lighting  plants,  rotary  converters, 
gas-engine  driven  battery  chargers 
and  AC  generators. 

Booth  214  Bell  St. 

Ken-Rad   Tube  &  Lamp   Corp. — Roy 

Burlew,  C.  J.  Hollatz,  A.  O.  Perlitz, 
Earl  S.  Fisher,  George  E.  Phillips, 
A.  J.  Valentine,  J.  J.  White,  A.  C. 
Torrence — radio  receiving  tubes. 

Booth  208  Faraday  Ave. 

Kenyon  Transformer  Co.,  Inc. — F.  P. 

Kenyon,  W.  G.  Many,  R.  E.  Stemm, 
H.  P.  Hardesty,  B.  G.  Paylor,  E.  P. 
Scott,  F.  C.  Somers,  H.  H.  Reyn- 
olds, W.  S.  Trinkle,  George  D. 
Norris — transformers  and  reactors 
for  all  radio  applications. 

Booth  213-215  Franklin  Ave. 

R,  R.   Mallory  &  Co.,    Inc. — Ray   F. 

Sparrow,  Howard  Sams,  Ben 
French,  Gordon  Peck,  M.  J.  Arvin, 
P.  Newton  Cook — Mallory-Yaxley 
condensers,  volume  controls,  vibra- 
tors, all-wave  switches,  resistors, 
battery  chargers,  rectifiers,  grid 
bias  cells,  jacks,  plugs,  cable  con- 
nectors, radio  convenience  outlets, 
miscellaneous  radio  hardware. 

Booth  108-110  Coulomb  St. 


54 


Radio  Today 


Here's  the  "special"  which  brought 
jobbers  from  the  Tulsa,  Okla.,  area  to 
the  Parts  Show.  It  was  sponsored  by 
J.  P.  Kay  of  Kay  Sales,  arrived  Mon- 
day, June  6. 

Meissner  Mfg.  Co. — Walter  Marsh, 
E.  Rinke,  J.  J.  O'Callaghan,  J. 
Maxon,  G.  H.  Timmings,  G.  V. 
Rockey — coil  kits,  IF  and  RF  coils, 
amateur  equipment,  push  button 
systems,  remote  controls. 

Booth  210  Coulomb  St. 

Million  Radio  &  Television  Labora- 
tories— John  W.  Million,  Jr.,  and 
M.  Perni — radio  service  test  instru- 
ments and  sound  equipment. 

Booth  215  Faraday  Ave. 

The  Muter  Co. — Leslie  F.  Muter, 
J.  R.  Scanlan,  F.  B.  Stevens,  A.  A. 
Dailey,  K.  E.  Rollefson — relays; 
Spirashields;  Thermotrols;  plug- 
in,  Candohm  and  Zipohm  resistors; 
push  button,  selector  and  jack 
spring  assembly  switches;  ceramic, 
paper  and  interference  filter  con- 
densers; resistance  bridges;  decade 
boxes Booth  205  Bell  St. 

National  Co.,  Inc. — James  Millen  and 
staff — communication  equipment. 

Booth  211  Ampere  St. 

National   Union  Radio   Corp. — H.   H. 

Kunkler,  R.  H.  Van  Dusen,  G.  E. 
DeNike,  J.  J.  Chine,  V.  Hamilton 
— radio  receiving  tubes,  electro- 
lytic and  paper  condensers,  tele- 
vision type  tubes  (Videotrons  and 
Monotrons),  radio  panel  lamps, 
exciter  lamps,  photo  electric  cells. 
Booth  205-207  Hertz  Ave. 

Ohmite  Mfg.  Co. — Ralph  M.  Hill,  Roy 
Laird,  Gordon  Gray — resistors  and 
rheostats. 

Booth  207  Franklin  Ave. 

Operadio  Mfg.  Co. — H.  A.  Wilson, 
L.  A.  King,  R.  W.  Bliss,  Frank 
Hagaman — public    address,    inter- 


communicating and  paging  equip- 
ment; public  address  speakers  and 
radio  replacement  speakers. 

Booth   218  Heitz  Ave. 

Oxford-Tartak    Radio    Corp. — P.     H. 

Tartak  and  J.  S.  Gartner — two 
new  series  of  replacement  speakers, 
complete,  regular  line  of  speakers 
for  PA  and  inter-office  communi- 
cating  systems. 

Booth  210  Faraday  Ave. 

Par-Metal     Products     Corp. — A.     A. 

Parmet,  Oren  H.  Smith — cabinet 
relay  racks,  panels,  chassis,  com- 
plete metal  accessories  for  amateur 
radio Booth  204  Bell  St. 

Park  Metalware  Co. — F.  B.  Farring- 
ton,  H.  A.  Roes,  John  O.  Olsen, 
J.  V.  Costello,  J.  E.  Talbert,  Han- 
sen &  Wetz — Xcelite  screwdrivers, 
nut  drivers  and  pliers. 

Booth  210  Marconi  Blvd. 

Parris-Dunn  Corp. — F.  E.  Brown, 
Diego  Fernandez,  C.  L.  Parris,  W. 
G.  Dunn — Hy-Tower  6-volt  wind- 
driven  battery  charger. 

Booth  108  Marconi  Blvd. 

Pauley-James  Corp. — H.  M.  Pauley, 
S.  F.  James,  H.  A.  Olsen,  J.  V. 
Park — auto  radio  vibrators,  DC  to 
AC    inverters. 

Booth  205  Ampere  St. 

Pliilmore  Mfg.  Co.,  Inc. — Cary  Granat 
complete  line  of  microphones,  bat- 
tery and  AC-DC  kits  and  sets,  crys- 
tal receiving  sets,  parts. 

Booth  214   Henry   St. 

Pioneer    Gen-E-Motor    Corp. — D.    E. 

Bright,  R.  D.  Wright,  Ben  Golder, 
W.  F.  Beck,  E.  J.  Decker — dyna- 
motors,  rotary  converters,  gas- 
electric  plants. 

Booth  203  Hertz  St. 

Precision  Apparatus  Corp. — M.  Ment- 
zer  and  P.  W.  Mack — radio  test 
equipment.  .Booth  209  Ampere  St. 

Presto  Recording  Corp. — R.  C.Powell 
— commercial  sound  instantaneous 
recording  equipment,  blank  record- 
ing discs  and  accessories. 

Booth  213  Faraday  St. 

(To  next  page) 


KEN 


DEPENDABLE 


R   A   D  I   0 


LIVE-RUBBER  MOLDED 

Condensers 

•  For  years  AEROVOX  engineers  have 
sought  higher  leakage  resistance  and 
breakdown  voltage  in  paper  condensers 
for  critical  r.f.  functions.  Phenolic 
resin  molded  units  were  tried  and  re- 
jected as  far  back  as  1930.  Likewise 
other  jacketing  means.  But  now — 
Eureka!  It's  the  live-rubber  molded 
paper  condenser — 88  series. 

Chech,  these  features  . . 


V 


V 


V 


V 


V 


V 


Selected  paper  section  molded  in  live 
rubber.  Moisture  cannot  penetrate. 
Casing  fits  snugly  around  pigtail  leads. 

No  moisture  released  during  vulcaniz- 
ing process.  Unit  cannot  absorb  mois- 
ture during  production. 

Molding  done  at  temperature  below  that 
of  vacuum  impregnation  cycle  of  sec- 
tion.    Section   cannot  be  impaired. 

No  excessive  pressure  during  molding, 
as  contrasted  with  phenolic  resin  mold- 
ing.    Section  remains  unchanged. 

Tests  indicate  insulation  resistance  and 
breakdown  voltage  far  exceeding  phen- 
olic resin  molded  units. 

Available  in  capacities  up  to  .25  mfd. 
in  200-volt,  .1  in  400-volt.  .05  in  600- 
volt,  and  .01  in  1000-volt. 


Ash  /or  them  .  •  . 


Look  us  up  at  206  Coulomb  St.,  Radio 
Parts  Show.  Or  ask  your  jobber  to 
show  you  these  rubber-molded  con- 
densers and  other  new  items.  Litera- 
ture on  request. 


mmmm 


J-*     "  CORPORATION 

I*     70  Washington  St.  :       :  Brooklyn,  N.  Y. 


June,  1938 


55 


KEY  TO  RADIO  PARTS  CITY 


Quam-Nichols  Co. — J.  P.  Quam,  H.  A. 
Staniland,  Elinore  Heppner,  R.  E. 
Breuer,  M.  E.  Schechter,  Carl  A. 
Stone,  Ivan  B.  Picard — loudspeak- 
ers  Booth  SIO  Bell  St. 


RCA   Mfg.   Co.,   Inc. — J.    A.    Milling, 
D.   Y   Smith,   E.   C.   Hughes,   Jr. — 

parts,  test  equipment,  transmitting 
tubes,  receiving  tubes,  Cunningham 
receiving  tubes. 

Booth  101-103  Marconi  Blvd. 


Radiart  Corp. — L.  K.  Wildberg,  B. 
Thomas,  M.  J.  Shapiro,  K.  C.  Bur- 
caw,  Neal  Bear — vibrators,  vibra- 
tor checkers,  Vipower,  new  Shaver- 
pak,   aerials. 

Booth  105  Ampere  St. 

Radio  Mfg.  Engineers — R.  M.  Planck 
and  E.  G.  Shalkhauser — communi- 
cation sets,  frequency  expanders, 
preselectors,  parts. 

Booth  208  Marconi  Blvd. 


Radiotechnic   Laboratories  ■ — -  H.    P. 

Manly   and   J.    M.    Haggard  —  test 
equipment. 

Booth  212  Faraday  Ave. 

Radio  Today — O.  H.  Caldwell,  M. 
Clements,  M.  E.  Herring,  Wm.  P. 
Woodall,  N.  B.  Lavers. 

Booth  111  Ampere  St. 


Raytheon  Production  Corp. — Earl  S. 
Dietrich,  E.  S.  Riedel,  Ralph 
Haines  and  field  salesmen — tubes 
for  receiving  and  amateur  sets. 

Booth  207  Henry  Ave. 

Readrite  Meter  Works — R.  L.  Trip- 
lets N.  A.  Triplett,  A.  R.  Baker, 
P.  E.  Wenger — radio  testers  and 
meters.  .Booth  215  Steinmetz  Ave. 


John  F.  Rider,  at  the  show  in  person 
— trouble-shooter's  manuals,  auto 
radio  manual,  volumes  on  align- 
ment, servicing,  etc. 

Booth  105  Marconi  Blvd. 


The  Rola  Co. — Lee  Golder,  Jno.  F. 
Church,  Milton  C.  Snyder — com- 
plete line  of  loudspeakers,  dynamic 
and  permanent  magnet  type. 

Booth  212  Coulomb  St. 


Shakeproof  Lock  Washer  Co. — J.  M. 

Gribbie,  Drew  Head,  Gordon  Lind- 
quist,  Frank  Dority,  O.  J.  Poupitch 
—  lock  washers,  thread-cutting 
screws,  locking  and  plain  ter- 
minals, radio  gears,  spring  wash- 
ers, special  stampings,  testing 
equipment. 

Booth  218  Franklin  Ave. 


Shure  Bros. — J.  B.  Albert,  Ralph  P. 
Glover,  S.  N.  Shure,  E.  L.  Berman 
— microphones,  phonograph  pick- 
ups, other  acoustic  devices. 

Booth  201-203  Bell  St. 


McMurdo  Silver  Corp.  —  McMurdo 
Silver,  Edwin  Dillon,  Robert  Camp- 
bell, James  Novy — radio  receivers, 
phonographs,  amplifiers. 

Booth  203  Ampere  St. 

Simpson  Electric  Co. — Ray  R.  Simp- 
son,  W.   A.   O'Brien,   H.   A.   Bern- 
reuter,  George  H.  Koch — radio  ser- 
vice  equipment  and  panel   meters. 
Booth  214  Coulomb  St. 

Solar  Mfg.  Corp. — Arthur  Moss,  W.  C. 
Harter,  J.  I.  Cornell,  P.  Gotthold, 
Al.  Prosdocimi — wet  and  dry  elec- 
trolytics,  paper  capacitors,  mica 
capacitors,  trimmers,  condenser 
analyzers  and  other  condenser 
items Booth  202  Bell  St. 

Sprague  Products  Co.  —  Irving  J. 
Kahan  and  Harry  Kalker — con- 
densers and  interference  filters. 

Booth  208  Hertz  Ave. 

Standard  Transformer  Corp. — Jerome 
J.  Kahn,  E.  E.  Gramer,  C.  L.  Pugh, 
Conrad  Roeschke,  Louis  Gamache, 
Harold  Krefft — transformers  and 
packs Booth  206-208  Bell  St. 

Star   Machine   Manufacturers,   Inc. — 

I.  B.  Finkel  and  Edward  Fish — 
Star  auto  radio  controls,  custom- 
matched  escutcheons  for  all  cars. 

Booth  211  Marconi  Blvd. 

Supreme    Instruments    Corp. — D.    N. 

Dulweber,  Samual  C.  Milbourne,  F. 
Fausett,  H.  Shotwell — radio  test- 
ing instruments. 

Booth  212-214  Hertz  Ave. 


MPLMFIERS 


!y  THORDARSON 

d£.  "JomiMow" 


PERFORMANCE 
t  APPEARANCE 

See  Your  Jobber  or 
Write  Factory  for 
Catalog  No.  600-C 

THORDARSON  ELECTRIC   MFG.  CO. 

Umpli^WL  (DiviiMtt 

500   W.   HURON   ST.   CHICAGO,   ILL. 


Built  by*  dwdio  £xp£AiL  f&L  Gmdio  £xfWdA* 


56 


Radio  Today 


Technical  Appliance  Coip. — T.  Lun- 
dahl,  H.  H.  Brown,  A.  H.  Bruning, 
L.  A.  Baurnann — antenna  systems, 
master  antenna  systems  and  kits, 
line  filters,  set  couplers  and  wave 
traps Booth  211B  Bell  St. 

Thordarson  Electric  Mfg.  Co. — C.  P. 

Cushway,  W.  S.  Hartford,  J.  Kleker 
— transformers,  amplifiers,  trans- 
mitters, etc. 

Booth  112-114  Coulomb  St. 

Triad  Mfg.  Co.,  Inc. — George  Coby, 
H.  H.  Steinle,  Ed  Singer — radio 
tubes.  .Booth  217B  Franklin  Ave. 

Trimm  Radio  Mfg.  Co. — Charles  A. 
Bottorff,  Don  C.  Wallace,  Paul  A. 
Bottorff,  Howard  F.  Smith — head- 
phones .  .  .  Booth  217  Faraday  Ave. 

Triplett  Electrical  Instrument  Co. — 

R.  L.  Triplett,  N.  A.  Triplett,  A.  R. 
Baker,  F.  E.  Wenger — radio  ser- 
vicing equipment  and  electrical 
measuring  instruments. 

Booth  213-215  Henry  Ave. 

Triumph  Mfg.  Co. — J.  J.  McCarthy, 
J.  P.  Kennedy,  E.  J.  Doyle,  Phil 
Hoffman — radio  testing  equipment 
and  associated  apparatus. 

Booth  106  Watt  Ave. 

Tung-Sol    Lamp   Works,   Inc. — E.    J. 

Counts,  Harold  Haskew,  Jas. 
Phelps,  J.  B.  Secrist,  L.  E.  Cotson, 
Irving  Einhorn,  Robert  S.  Mac- 
Arthur,  P.  R.  Dawson,  C.  P.  Har- 
ders,  A.  M.  Schuster,  D.  L.  Lind- 
borg,  Z.  V.  Thompson,  Folsom  Co., 
J.  H.  Blinn  Co.,  C.  D.  Belt,  J.  N. 
Hoover,  Guy  A.  Austin,  H.  F. 
Bersche,  A.  A.  Berman,  John  W. 
Davis,  Z.  S.  Myers,  R.  H.  Brown, 
R.  H.  Howig,  Chas.  Silvey,  David 
M.  Lee,  E.  T.  Lombard,  G.  A. 
Bodem,  A.  F.  Hellert,  V.  B.  Level, 
W.  R.  Ohlsen,  W.  L.  Roberts,  H.  J. 
Casey — radio  tubes. 

Booth  110-112  Marconi  Blvd. 

The    Turner    Co. — R.    L.    Thompson, 

B.    W.     Dew,     H.    W.    Johnson — 

crystal   and  dynamic   microphones. 

Booth  117  Marconi  Blvd. 

United  Sound  Engineering  Co. — H. 
M.  Richardson,  R.  E.  Jones,  L.  J. 
Burton,  R.  Von  De  Linde,  Allan  J. 
Hanson,  C.  Sands — public  address 
and  intercommunication  equipment, 
school  sound  systems. 

Booth  218  Henry  Ave. 

United     Transformer    Corp.  —  S.     L. 

Baraf,  I.  A.  Mitchell,  F.  R.  Ellin- 
ger,  A.  H.  Baier,  R.  C.  James,  Jr., 
H.  E.  Walton,  Harry  Gerber,  C.  R. 
Strassner,  M.  E.  Foster,  W.  T.  Mc- 
Gary,  James  Millar,  H.  Segar,  J.  W. 
Van  De  Grift,  J.  E.  Nestell — trans- 
formers, reactors,  voltage  regula- 
tors, transmitter  kits. 

Booth  200  Steinmetz  Ave. 

Utah  Radio  Products  Co. — Oden  F. 
Jester,  G.  H.  Beasley,  R.  M.  Karet 
and  Harry  J.  Sclieel — speakers, 
amateur  kits,  vibrators,  tuning 
units,  volume  controls,  relays,  test 
equipment,  transformers. 

.Booth  113-115  Marconi  Blvd. 

Vulcan    Electric   Co. — Jasper    Marsh, 


Dwight  Marsh,  F.  E.  Merriam,  J.  L. 
Brothers,  H.  Tom  Collins,  A.  J. 
Bayus — electric  and  mercury  elec- 
tric soldering  irons,  wax  melting 
pots,  solder  melting  pots 

Booth  104A  Watt  Ave. 

Ward  Leonard  Electric  Co. — Arthur 

A.  Berard,  Frank  Beede,  Kline 
Gray,  Ray  Vonasch  —  resistors, 
rheostats,  relays,  line  voltage  re- 
ducers  Booth  113  Bell  St. 

The    Ward    Products    Corp. — H.    R. 

Wiesenberger,  R.  N.  Wiesenberger, 
and  various  territorial  representa- 
tives— aerials. 

Booth  215-217  Hertz  Ave. 

Earl  Webber  Co. — Earl  N.  Webber, 
R.  M.  Krueger,  A.  Kraatz,  G. 
Reinecke — tube  testers,  oscillators, 
radio  service  laboratory,  vibrator 
testers,  test  speakers,  vibrator 
analyzer. 

Booth  210  Steinmetz  Ave. 

Webster-Chicago — John  Erwood,  F. 
J.  Wessner,  M.  B.  Patterson,  Ray 
Carson,  H.  B.  Segar,  G.  W.  Sipe, 
M.  K.  Smith,  R.  M.  Gray,  E.  Carl- 
son,   S.    Egert,    L.     W.    Maynard, 

B.  J.  Fitzner,  W.  S.  Trinkle,  H. 
W.  Groetzinger,  W.  A.  Hendrick- 
son,  J.  J.  McBride — sound  equip- 
ment ....  Booth  202  Marconi  Blvd. 

Webster  Electric  Co.  (Racine) — -S.  A. 

Loeb,  P.  G.  Crewe,  A.  C.  Kleckner, 
Henry  G.  Kobick,  R.  Ferda,  R.  H. 
Campbell,  F.  Williamson,  W.  H. 
Johnson,  V.  Daniels,  N.  Reeve — 
intercommunication  systems,  Tele- 
talk,  public  address  systems,  sound 
equipment,  crystal  pickups,  Sym- 
photone,  school  equipment. 

Booth  214-216  Franklin  Ave. 

Weston   Electrical    Instrument   Corp. 

— Paul  Westburg,  Alvin  Thielke, 
Carl  Miller,  Carl  Ketel,  Herbert 
Raschke,  O.  J.  Morelock,  V.  E. 
Jenkins — complete  line  of  tube 
checkers,  oscillators,  analyzers, 
vacuum  tube  voltmeters,  volt-ohm- 
meters,  capacity  meters,  and  an- 
nouncement of  company's  50th 
anniversary. 

Booth  109-111  Marconi  Blvd. 

Wirt  Co. — Paul  G.  Duryea,  R.  F.  Toy- 
lor,  Mark  Thackaberry — resistors, 
suppressors,  switches,  carbon  re- 
sistors, wire  wound  resistors,  volt- 
age regulators. 

Booth  209  Faraday  Ave. 

Wincharger  Corp. — M.  M.  Lasensky, 
W.  F.  Herron,  A.  A.  Stewart — ■ 
Winchargers. 

Booth  203-205  Marconi  Blvd. 

Zenith  Radio  Corp. — H.  W.  Blakes- 
lee  and  R.  F.  Miller — radios  and 
replacement  parts. 

Booth  109  Ampere  St. 

The  booth  of  the  Radio  Servicemen 
of  America,  at  110  Ampere  St.,  at  the 
Parts  Show  will  be  built  around  a 
geographical  interpretation  of  the 
growth  and  strength  of  RSA,  accord- 
ing to  announcements  from  the  Chicago 
chapter.  RSA  also  says,  "for  fun, 
we'll  have  trick  devices,  real  brain- 
busting  ideas,  and  specimens  of  true 
and   ridiculed  antiquity  and   novelty." 


June,  1938 


57 


BROWN  DEVILS  ...  the  famous 
Ohmite  wire-wound  replacement  resis- 
tors. Extra-Sturdy  construction  and  per- 
manent Ohmite  vitreous  enamel  coating 
insure  long,  trouble-free  service.  10 
and  20  watt  sizes.  Resistance  values  1 
to  100,000  ohms. 

DIVIDOHMS  ...  the  handy  Ohmite 
vitreous  -  enameled  adjustable  resistors 
that  solve  most  any  power  resistor  prob- 
lem in  a  pinch.  Ratings  from  10  to  200 
watts,  resistances  through  100,000  ohms. 

RHEOSTATS  .  .  .  Ohmite  all-porce- 
lain vitreous  -  enameled  rheostats  —  for 
smooth,  safe,  close-control  of  motor 
speed,  filament  voltage,  lamp  dimming, 
etc.  Wide  range  of  resistance  values  in 
ratings  from  25  to  1,000  watts. 

R.F.and  POWER  LINE  CHOKES  . . . 

for  transmitter  and  receiver  R.  F.  cir- 
cuits, interference  elimination,  etc. 

Fixed  Resistors,  1  %  Accurate  Precision 
Resistors  and  other  Ohmite  products 
also  available  from  your  Jobber. 

Write   for   Free   Copy   or 
New   Ohmite  Catalog    J 7. 

Visit  the  Ohmite  Booth,  National  Ra- 
dio Parts  Trade  Show,  Chicago,  June  8-11. 

OHMITE  MANUFACTURING  CO. 

4847   W.  Flournoy  Ave..   Chicago,   U.S.A. 


OHMIT.i 

RHEOSTATS     RESISTORS     TAP  SWITCHES 


PARTS  SHOW 
FLASHES 


A  Model  Radio  Service  Shop,  a  rep- 
lica of  the  original  one  built  by  By- 
grade  Sylvania  Corp.  at  their  Em- 
porium, Pa.,  plant,  will  be  featured  at 
the  company's  booth  at  204-206  Ampere 
St.  at  the  Parts  Show.  Designed  to 
meet  the  modernization  needs  of  ser- 
vice shops  of  medium  size,  the  Model 
Shop  accents  economy,  compactness, 
neatness,  modern  styling,  and  every- 
day efficiency.  Working  plans  and  de- 
tailed descriptions  will  be  available  at 
the  booth. 

A  special  breakfast  for  representa- 
tives and  staff  officers  will  be  held  by 
Webster  Electric  Co.,  Racine.  Wis.,  at 
the  Stevens  Hotel  June  9,  for  a  huddle 
on  new  products,  plans,  policies,  etc. 
Among  the  guests  will  be  Webster  rep- 
resentatives Norman  B.  Neely,  South- 
ern California;  J.  J.  Backer,  Seattle; 
J.  T.  Schoonmaker,  Dallas;  J.  P.  Kay, 
Tulsa;  N.  B.  Delavan,  Des  Moines; 
Blair  H.  Parker.  New  England;  Frank 
A.  Baumgarten,  Pittsburgh;  J.  B.  Hig- 
gins,  Detroit;  Murphy  &  Cota,  Atlanta; 
J.  A.  Wherry,  New  Orleans;  Martin 
Friedman,  Philadelphia;  W.  T.  Croys- 
dill,  Buffalo;  L.  C.  Kohn,  Omaha;  C.  G. 
Curry,  Indianapolis;  L.  H.  Mingins, 
New  York;  Arthur  Rocke,  L.  A.  De- 
Barros  and  J.  E.  Nestell. 

W.  Keene  Jackson,  general  sales 
manager  of  International  Radio  Corp., 
has  established  Kadette  headquarters 
at  Suite  2205,  Stevens  Hotel,  during 
the  Parts  Show,  June  8-11.  Several 
territorial  representatives  for  Kadette 
will  assist  Mr.  Jackson  at  the  display. 
The  new  Glide  Shaver,  an  electric 
razor  just  brought  out  by  International 
to  sell  at  $7.50,  will  be  introduced  to 
dealers. 

Hoivard  Radio  Co.'s  line  of  home  re- 
ceivers will  be  shown  during  the  parts 
show  at  the  Hotel  Blackstone,  with 
C.  B.  Shapiro,  Joseph  F.  Riley,  B.  C. 
Briggs  and  others  on  hand.  Official 
distributors'  luncheon  and  sales  meet- 
ing will  be  held  June  9. 

James  R.  Fouch,  president  of  Uni- 
versal Microphone  Co.,  Inglewood,  Cal., 
will  preview  new  model  microphones 
and  recorders  exclusively  to  his  fac- 
tory representatives  in  Room  2200  at 
the  Stevens  Hotel  during  the  Parts 
Show.  Information  and  details  will  be 
furnished  jobbers  through  usual  trade 
channels. 

Monarch  Mfg.  Co.,  3341  Belmont 
Ave.,  Chicago,  is  presenting  for  the 
benefit  of  visiting  radio  men,  a  new 
type  of  test  instrument,  Model  18F, 
which  is  also  suitable  for  use  in  the 
factory  alignment  of  radio  sets. 

Chicago  radio  guests  during  the 
Parts  Show  are  invited  by  president 
J.  G.  Mann  of  Consolidated  Wire  & 
Associated  Corp.  to  visit  the  plant  at 
Peoria  and  Harrison  Streets,  to  look 
over  the  company's  big  line  of  radio 
specialties,  including  antenna  wire, 
aerials,  etc. 


Special  event  beginning  June  6  and 
now  in  progress  at  the  Blackstone 
Hotel  in  Chicago  is  a  general  sales 
meeting  of  U.  S.  representatives  of  the 
Thordarson  Electric  Mfg.  Co.,  500  W. 
Huron  St..  Chicago.  Sales  manager 
C.  P.  Cushway  outlines  plans  and  pro- 
grams for  the  firm's  big  Fall  cam- 
paign; new  amplifiers  are  introduced 
and  demonstrated.  Throughout  the 
Show  period  in  Chicago,  extra  Thor- 
darson representatives  will  be  on  hand 
to  greet  visiting  jobbers. 

President  Henry  C.  Forster  of  Radio 
Speakers,  Inc.,  1338  S.  Michigan  Ave., 
Chicago,  has  announced  that  the  firm's 
new  line  of  electro-dynamic  and  per- 
manent magnet  dynamic  speakers  will 
be  presented  to  the  trade  during  the 
show  period. 

Details  of  an  "unusual  distributor 
plan"  will  be  revealed  in  connection 
with  the  "open  house"  display  of  the 
new  Sonora  line,  to  be  held  at  the 
Blackstone  Hotel  June  8-11,  according 
to  Sonora  president  Joe  Gerl. 

Dedicated  to  "consistent  increases 
in  sales  of  Rider  Manuals  and  Radio 
Books."  publisher  John  F.  Rider  has 
moved  to  new  and  larger  offices  at  404 
Fourth  Ave.,  New  York,  N.  Y.  Mr. 
Rider  will  soon  announce  "an  instru- 
ment, and  a  book,  with  which  service- 
men can  quickly  solve  one  of  the  most 
baffling  servicing  problems." 

Federal  Sales  Co.,  Chicago,  have 
doubled  their  display  space  at  the 
company's  showrooms  at  24-26  S.  Jef- 
ferson St.  Head  man  Joseph  M.  Levine 
has  dedicated  the  expansion  to  better 
presentation  of  Federal's  radio  hard- 
ware merchandise,  and  to  prompt 
handling  of  all  inquiries. 


25  PRIZES  FOR 
SERVICEMEN 


In  a  special  "50th  Anniversary  Con- 
test," the  Weston  Electrical  Instru- 
ment Corp.  offers  to  servicemen  25 
prizes  with  a  value  over  $1,000.  The 
Newark,  N.  J.,  firm  will  make  the  an- 
nouncement at  the  Radio  Parts  Show 
in  Chicago,  will  close  the  contest  Sept. 
1  and  will  announce  the  awards  Oct.  1. 

First  prize  is  a  complete  service- 
man's test  bench,  pictured  on  page  48, 
including  a  highsensitivity  analyzer, 
socket  selector  set,  tube  checker,  all- 
wave  a.a.c.  oscillator,  set  of  Rider's 
manuals,  and  a  set  of  service  tools  and 
replacement  tubes.  Second  prize  is  a 
combination  high-sensitivity  analyzer 
and  tube-checker  unit.  Other  prizes 
include  analyzers,  tube  checkers,  oscil- 
lators and  servicing  accessories. 

Prizes  will  be  given  for  the  most 
practical  and  interesting  answer  to  the 
question,  "How  modern  test  equipment 
helped  me  to  solve  a  difficult  servicing 
problem."  Decisions  of  the  judges 
will  be  based  on  "the  usefulness  and 
interest  of  an  actual  incident  or  'true 
story'  based  on  everyday  servicing  ex- 
perience." 

The  competition  is  open  to  all  active 
servicemen,  except  those  connected 
with  Weston.  Entries  should  be  sub- 
mitted on  special  blanks  available 
from  jobbers,  Weston  representatives, 
or  from  Weston  headquarters  in  New- 
ark, N.  J. 


58 


Radio  Today 


NEW  PHILCO  DIRECTORS 

Two  new  members  of  the  board  of 
directors  and  a  new  vice-president, 
have  just  been  named  by  Philco  Radio 
&  Television  Corporation,  announces 
Larry  E.   Gubb,  president. 

William  H.  Grimditch.  who  has  been 
in  charge  of  the  Engineering  Depart- 
ment, has  been  made  vice-president 
In  charge  of  engineering,  and  a  di- 
rector. Thomas  A.  Kennally.  sales  man- 
ager, also  has  been  chosen  a  member 
of  the  board. 

The  full  Philco  board  now  consists 
of  President  Larry  E.  Gubb;  Vice- 
President  Sayre  M.  Ramsdell,  William 
H.  Grimditch.  and  Russell  L.  Heber- 
ling;  John  Ballantyne,  treasurer;  H. 
S.  McDaniel,  secretary;  C.  E.  Carpen- 
ter and  Thomas  A.  Kennally. 


tenberg,  R.  M.  Ryan,  H.  C.  Seaman, 
Roy  Schenck,  J.  C.  Stagg,  A.  E.  Stev- 
ens, Karl  R  Tallau,  Kenneth  Tibbits, 
Paul  Weil,  Mr.  Weiss  and  others. 


TORTURE    TESTS 


RADIO  GOLF  PARTY 


Some  50  guests  went  to  a  lively 
radio  golf  party  held  May  24  at  the 
Sound  View  Golf  Club,  Long  Island, 
N.  Y.  Foursomes  were  made  up  at 
lunch,  and  after  an  afternoon  of  pleas- 
ant golfing,  the  guests  sat  down  to 
dinner  and  were  awarded  a  series  of 
important  prizes.  The  party  plans 
were  made  by  "Vic"  Mucher  of  Claro- 
stat,  chairman  of  the  Arrangements 
Committee. 

Guests  included  A.  E.  Ackeroyd, 
Leon  Adelman,  Pete  Bercoe,  R.  E. 
Beuer,  Bert  Clough,  Paul  Ellison,  W. 
P.  Germaine,  Walter  W.  Jablon,  R.  W. 
Judkins,  Robert  McKeown.  Ed  Metzcar, 
William  Naumberg,  William  Osier, 
Henry  Pope,  John  F.  Rider,  Sam  Rut- 


At  the  Wincharger  plant  in  Sioux 
City,  Iowa,  unusual  tests  are  being 
conducted  in  which  wind  chargers  are 
put  through  extreme  "torture  tests." 
A  powerful  blower,  driven  by  a  gaso- 
line motor,  creates  a  60  mile  per  hour 
gale  and  matters  of  vibration,  over- 
speed,  propeller  materials,  wind  pres- 
sure, etc.,  are  carefully  checked.  The 
Winchargers  are  placed  6  feet  from 
the  blower  in  the  full  sweep  of  the 
artificial  wind  and  their  performance 
noted  in  detail.  John  Albers,  who, 
with  Gerhart  Albers,  is  co-inventor  of 
Winchargers,  states  that  the  principal 
object  of  the  torture  is  to  make  ac- 
celerated tests. 

RSA  DIRECTORS  MEET 

The  Radio  Servicemen  of  America 
in  the  past  three  weeks  has  affiliated 
with  the  national  organization  local 
groups  in  Alton,  111.;  Staten  Island, 
N.  Y.;  Holyoke,  Mass.;  Fremont, 
Ohio,  and  Lansing,  Mich. 

Regional  setups  in  several  sections 
of  the  country  are  in  the  process  of 
formation  and  will  be  completed  in 
the  near  future. 

The  first  Board  of  Directors  meet- 
ing of  the  RSA  will  be  held  in  con- 
junction with  the  first  RSA  Conven- 
tion at  the  Hotel  Stevens,  in  Chicago, 
June  8-11. 


New  Bedford — New  Bedford  Chap- 
ter announces  with  regret  the  death 
of  Mr.  F.  Fiske,  who  was  President 
of  the  Chapter  and  had  been  con- 
nected with  the  service  industry  since 
the  first  days  of  broadcasting.  The 
Chapter  has  voted  to  discontinue 
temporarily  the  weekly  lectures  of 
its  new  training  course,  pending  the 
return  of  Mr.  A.   C.  W.   Saunders. 

Lansing  —  Lansing  Chapter  held 
its  first  meeting  in  May.  Second  and 
fourth  Tuesdays  of  each  month  were 
selected  as  regular  meeting  dates. 
These  meetings  to  be  held  at  8:00 
p.m.  at  the  E.  Michigan  Av.  Fire 
Station  Club  Rooms  until  further 
notice.  Mr.  Joe  Cole,  the  District  Di- 
rector, was  present,  as  was  Mr.  Frank 
Anderton,  the  Secretary  of  the  De- 
troit Chapter.  These  two  men  went 
very  thoroughly  into  the  purposes  of 
the  aims  and  ideals  of  the  RSA. 

Detroit — Detroit  Chapter  has  held 
a  series  of  closed  meetings  at  which 
time  the  by-laws  were  thoroughly 
thrashed  out  and  a  final  set  adopted. 
A  copy  has  been  sent  to  the  national 
office  for  perusal  and  comment.  We 
feel  that  these  by-laws  will  form  a 
permanent  frame-work  upon  which 
the  Detroit  Chapter  can  be  built  to 
the  greatest  heights  in  its  existence. 

Freeport — The  Chapter  has  made 
arrangements  with  Mr.  F.  W.  Whit- 
lock  to  teach  them  AFC,  AVC,  ASC, 
etc.  We  have  felt  for  some  time  that 
a  knowledge  of  alternating  current 
theory  would  be  very  helpful  in  un- 
derstanding newer  developments  in 
(To  next  page) 


TAKE  SALES  and 
MAKE  PROFITS  with 
the  BRUSH  "HUSHATONE" 

THE  BRUSH  "Hushatone,"  the  pillow  speaker  that  appeals  to 
the  desire  for  comfort  and  carries  a  price  that  encourages  a 
volume  of  business,  is  sure  to  increase  your  sales  and  make  you 
profits.  Simple  to  attach  to  any  radio,  the  Hushatone  is  ideal  for 
home  use  —  in  bed,  on  a  couch  or  comfortable  chair.  It  is  a  natural 
for  hospitals  and  sanitariums,  bringing  untold  comfort  and  convenience  to  the  bedridden.  Clip 
the  coupon  below  for  more  information  on  this  sure  way  to  more  sales  and  bigger  profits. 

Gfie    BRUSH 

DEVELOPMENT  COMPANY 

3313  PERKINS  AVE.,  CLEVELAND,  OHIO 


Please   send   as   soon   as   possible   complete   information 
about    the    Brush    "Hushatone"     (pillow    speaker). 

I 


I 


|       City. 


June,  1938 


59 


RSA  CHAPTERS 


new  sets.  The  first  class  met  Monday, 
May  9.  and  plans  were  made  to  meet 
twice  monthly  thereafter. 

Jamestown — At  a  meeting  held 
May  17th  a  report  on  results  of  cash 
policy  which  has  been  put  into  ef- 
fect by  all  dealers  and  servicemen 
shows  that  it  is  working  out  very 
well  and  is  a  great  improvement  over 
old  credit  methods.  General  discus- 
sion on  proper  prices  to  charge  for 
auto  radio  installations  resulted  in  a 
minimum  charge  of  $3.50  for  dealers 
be  established.  Meeting  dates  of  the 
Chapter  have  been  changed  to  the 
first  Monday  of  every  month  through 
the   summer. 

New  York — The  Chapters  in  the 
New  York  region,  namely,  West- 
chester, Newark,  N.  J.,  and  the  Met- 
ropolitan N.  Y.  Chapter,  are  collabo- 
rating on  a  projected  show  program 
for  the  early  fall.  Details  will  be  an- 
nounced in  the  near  future. 

Dulnth — The  Duluth  Chapter  at- 
tended the  Minneapolis  Radio  Deal- 
ers' Convention  in  a  body.  A  fine 
time  was  reported  by  all.  In  the  early 
fall  we  plan  to  hold  a  get-together 
of  our  own  at  which  time  speakers 
as  well  as  a  well  rounded  program  of 
entertainment  will  be  provided.  Fur- 
ther details  will  be  announced. 

Alton — The  Alton  (111.)  Chapter 
voted  to  affiliate  with  the  RSA  and 
join  with   other  groups  of  servicemen 


throughout  the  country  to  improve 
the  business  and  technical  efficiency 
of  its  members.  Officers  are:  Chair- 
man, Robert  W.  Clayton;  Secretary- 
Treasurer,  R.  L.  Poster. 

Fremont — Under  the  leadership  of 
John  Mutschler,  the  Fremont,  Ohio, 
Chapter  was  formed.  This  chapter 
has  in  its  membership  area  several 
towns  in  and  around  Fremont.  In- 
teresting technical  lectures  as  well 
as  business  meetings  are  planned  for 
the  near  future.  Meetings  will  be 
held  the  second  and  fourth  Mondays 
of  each  month. 

Steubenville — Steubenville  (Ohio) 
Chapter  voted  to  affiliate  with  the 
RSA  at  their  last  meeting.  This  chap- 
ter is  under  the  leadership  of  Chair- 
man R.  P.  Harris,  Secretary  Edward 
Zysko   and  Treasurer  J.  B.   Stringer. 

St.  Paul — The  St.  Paul  Chapter 
voted  some  time  ago  to  affiliate  with 
the  RSA  and  final  details  of  the  af- 
filiation were  carried  out  at  a  meet- 
ing held  Thursday,  May  2  6th.  This 
chapter  is  under  the  leadership  of 
President  W.  T.  Moffitt,  Secretary 
Paul  J.  Biehler.  Mr.  Irv  Polsky,  who 
was  present  at  the  original  forma- 
tion meeting  of  the  RSA  in  Chicago, 
is   an  active  member. 

W.  F.  Seeman,  widely  known  as 
"Bill"  and  as  a  representative  for 
Ohmite,  Solar,  and  other  electrical  and 
radio  lines,  has  moved  to  new  quar- 
ters at  523  Ellicott  Square,  Buffalo, 
N.  Y. 


HANDBOOK  OF  AMATEUR  TUBES 


Publication  of  a  brand  new  collec- 
tion of  data  for  radio  amateurs  has 
been  announced  by  Raytheon  Produc- 
tion Corp.  Technical  information  on 
modern  transmitter  design  is  featured, 
emphasizing  the  selection  and  the 
most  advantageous  use  of  tubes.  In- 
cluded in  the  book  is  a  special  tem- 
perature color  chart,  which  permits 
the  amateur  to  tell  when  his  tube  is 
being  properly  operated,  by  comparing 
the  color  of  the  plate  of  his  tubes  with 
the  chart  and  reading  the  tempera- 
ture. Modulation,  output,  impedance 
and  L/C  ratio,  grid  driving  power, 
ratings,  tube  classifications  and  char- 
acteristics are  treated  in  detail,  with 
appropriate  curves  to  illustrate. 
"Handbook  of  Amateur  Tube  Uses"  is 
available  from  Raytheon  distributors 
at  50c. 


CONTINENTAL  CARBON  presents  a  new  type  of  wire  wound 
resistor — superior  in  design,  stable  in  performance,  and  par- 
ticularly suited  to  radio  and  amplifier  service.  The  highest 
quality  materials  are  used  in  these  fully  guaranteed  ULTRil- 
WflTT  resistors. 

fl  ceramic  tube  uniformly  wound 
with  wire  of  practically  zerc 
temperature  coefficient  and  in- 
sulated with  a  dense  covering  of 
heat  resistant  cement  provides 
a  resistor  of  permanent  value. 
W20,  20-watt  capacity,  in  values 
of  5  to  50,000  ohms,  plus  or  minus 
5%  at  a  list  price  of  65c.  W10- 
10  watts,  1  to  2S.000  ohms,  5% 
tolerance,  list  price  of  40c.  W5( 
5  watts,  1  to  10,000  ohms,  5% 
tolerance,  list  price  of  30c. 

For  r-f  and  lower  power  circuits,  specify  CONTINENTAL  CAR- 
BON bakelite  or  ceramic  insulated  resistors  in  V2,  1,  or  3-watt 
capacity  in  any  tolerance  from  2%  up.  Rsk.  for  Bulletin  104C. 


Continental  Carbon  Inc. 


13910  LORAIN  AVENUE  CLEVELAND,  OHIO,  U.  S.  A. 

CANADIAN  PLANT— TORONTO,  ONTARIO 


Complete 
Electric     Plants 


60 


NEW 
1938 

MODELS 

SIZES 
350  to  5000  WATTS 


COMPLETE   POWER  UNITS 

Operating  A.C.  Radio,  PUBLIC  ADDRESS  SYS- 
TEMS, SOUND  CARS,  MOTION  PICTURE 
EQUIPMENT,  and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Systems  Refrigera- 
tors,all  Household  Appliances  for  FARMS,  CAMPS, 
LAKE  HOMES,  or  STANDBY  SERVICE.  For  use 
anywhere  Power  Line  Current  is  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C,  6,  12,  32  and  110  Volt,  D.C.  as  well 
as  Combination  A.C. -D.C.  Units.  Anyone  can  Oper- 
ate. COMPLETE,  READY  TO  RUN. 

Write  jor  Details  on  Dealers'  Proposition  and  Territory 

D.  W.  ONAN  &  SONS 

592  ROY  ALSTON  AVENUE,  MINNEAPOLIS,  MINN. 

Radio  Today 


SALES  AID 


DECAL  FEATURES  TUBES 


C£ 


A  freshly  designed  window  deealco- 
mania  featuring  "set  tested  tubes"  has 
been  released  by  Hygrade  Sylvania 
Corp.  It  is  available  in  two  forms;  one 
says  "authorized  dealer"  and  goes  to 
retailers,  the  other  is  for  jobbers  only. 
The  item  is  presented  as  an  important 
year-'round  salesman,  and  as  a  lively 
form  of  dealer  identification. 

The  new  decal  is  one  of  a  series  of 
free  dealer  helps  available  from  Syl- 
vania. Other  promotional  items  in- 
clude tube  guarantee  counter  signs, 
window  displays,  outside  metal  flange 
signs,  dummy  tube  cartons  for  display, 
etc. 


FOR  HINGE  AND  COWL  AERIALS 


A  display  of  auto  aerials,  which  is 
also  a  "one-of-a-kind"  stock  of  hinge 
and  cowl  models,  is  being  presented  by 
the  Radiart  Corp.,  Shaw  Ave.  at  133rd 
St.,  Cleveland,  Ohio.  The  company's 
matching  resonator  is  also  shown 
against  the  brightly  painted  back- 
ground. The  display,  No.  D-5,  is  avail- 
able without  charge. 

The  new  General  Electric  slide  film 
called  "Scoop,"  in  which  E.  H.  Yogel 
appears  with  the  new  GE  line,  has  a 
series  of  pictures  produced  in  process 
color.  The  striking  slides  are  believed 
by  the  producers.  AudiVision,  Inc., 
285  Madison  Ave..  New  York  City,  to 
be  a  "first"  for  the  industry.  The 
other  two  GE  films  are  "How  to  Win 
Sales,"  by  Dale  Carnegie,  and  "Let 
George  Do  It,"  by  R.  C.  Borden. 


TORFONE'^ 

The  Biggest  Buy  in  Communication  Systems 


THE  1939  SENSATION! 
NOTHING  CAN  TOUCH 
IT!  LOW  PRICE  — FAST 
MOVING.  IT  SELLS  BE- 
CAUSE  IT   PERFORMS! 


TOKFONE 


// 


JUNIOR 


TOKFONE,  Jr. 
Remote  Station 


TOKFONE,  Jr. 
Master  Station 


Consisting  of  Master,  4| 


Remote    Station 
50  ft.  of  wire 


and 


10 


75 

NET 


YOU  CAN  CRASH  this  FERTILE  MARKET  with  TOKFONE 

If  you're  in  a  position  to  "CASH-IN"  with  FAST  MOVING-LOW  PRICED  intercom- 
munication  systems  then  you  owe  it  to  yourself  to  get  in  touch  with  REGAL — NOW  I 
NOTE  THESE  FACTS:  OTHER  TOKFONE  SYSTEMS— adaptable  to  meet  all  require- 
ments— from  2  to  40  stations — beautifully  hand-rubbed  cabinets — NO  PREFERENCES — 
NO  TRICKS — No  Makeshifts — All  New  Merchandise — Special  Units  if  Necessary — Manu- 
factured in  our  own  factory.  We  also  Manufacture  P. A.  Equipment  in  the  following  sizei: 
6,  12,  15,  30,  60  Watt — Amplifiers — Parts  used  are:  Aerovox-Thordarson — I.R.C. — Parmet- 
Rola — Clarostat-Eby   and    Holyoke — Nothing   but    the   best. 

Send  for  Catalog  Showing  Complete  Line. 

REGAL  AMPLIFIER  MANUFACTURING  CORP. 

14  WEST  17th  STREET  ^Ram^aZ"  NEW  Y0RK  CITT 

»PEP*  PUNCH*  PRICE*' 


CINAUDAGRAPH  oners  you  today 
the  biggest  money's  worth  In  the 
permanent  magnet  speaker  field. 
In  workmanship.  In  high  frequency 
tested  performance  and  now  In  price, 
you  can't  beat  Clnaudagraph. 

ENJOY  THEIR  EXTRA  VALUE 
.at  no  extra  cost ! 


CINAUDAGRAPH' 
PERMANENT 
*    A    G    N    E    T 


CINAUDAGRAPH  SPEAKERS 
cost  no  more... 

You  know  well  the  superior  quality  Cinaudagraph 
builds  into  Its  speaker  units;  you  know  the  painstak- 
ing exactness  of  Cinaudagraph  engineers.  Indeed, 
this  is  common  knowledge  to  the  radio  Industry  today. 
But — and  here  IS  news — do  you  know  that  Cinauda- 
graph speakers  are  now  competitively  priced  .  .  .  that 
you  can  specify  these  superb  quality  instruments  on 
your  jobs  of  no  extra  cost? 

Cinaudagraph  P.M.'s  are  available  in  a  complete  range 
from  5  to  18  inches^— new  line  of  electro-dynamics  from 
5  to  10  inches.  •  Visit  with  us  at  the  National  Parts  Show 
in  Chicago,  Booth  214  Faraday  Avenue,  and  demonstration 
room  No.  502-A  at  the  Stevens  Hotel.. 


CINAUDAGRAPH 
CORPORATION 

SPEAKER  DIVISION 

STAMFORD,  CONNECTICUT 


June,  1938 


61 


SOUND 
SYSTEM! 


Mtintiininf  Leadership  and  Reputation 
"ALWAYS  FIRST  WITH  THE  LATEST" 

WIRELESS 
REMOTE  CONTROL! 

(TWO  CHANNEL) 

Sound  Men  —  Don't  miss  this 
amazing  new  development.  Perfect 
remote  control  of  volume  by  WIRE- 
LESS on  any  Bogen  Amplifier. 

• 

Another    Bogen    Exclusive! 

SELECTIVE  WIRELESS 

INTERCOMMUNICATION! 

•  UP  TO  10  MASTER  STATIONS  • 

Any  station  can  call  any  other  sta- 
tion privately  or  page  them  all  at 
once. 


See  and  hear  this  equipment  dem- 
onstrated in  Rooms  556-557-560, 
Hotel  Stevens,  or  Booth  206,  Stein- 
metz  Avenue,  National  Radio  Trade 
Show. 


For  those  not  attending  Show 

Complete    literature    available 

WRITE 

DAVID  BOGEN  CO.,  inc. 


S63  BROADWAY 


NEW  YORK  CITY 


DISTRIBUTORS 


GETTING  THE  MONEY  "IN" 

(From  page  16) 

ary  cash  discount  on  the  tenth  of  the 
month  following  purchase,  these  ac- 
counts will  he  due  net  after  that  date 
end  become  overdue  on  the  twentieth 
of  the  same  month.  If  any  account 
sold  on  these  regular  terms  is  not 
settled  by  the  tenth  day  of  the  second 
month  following  purchase,  it  shall  be 
reported  (without  option  on  the  part 
of  the  member)  to  the  secretary  of  the 
group,  and  the  name  shall  be  reported 
to  all  members  of  the  group  and  shall 
remain  on  the  monthly  consolidated 
report  until  all  accounts  so  reported 
shall  be  settled  in  full. 

For  example :  October  purchases  will 
be  due  for  usual  cash  discount  on  or 
before  November  10,  and  thereafter 
will  be  due  on  a  net  basis  and  be- 
come overdue  on  the  20th  of  Novem- 
ber. If  these  October  purchases  are 
not  paid  in  full  before  the  tenth  of 
December,  the  member  or  members  of 
the  group  to  whom  the  indebtedness 
is  owing  will  advise  the  secretary, 
tvho  will  report  such  unpaid  accounts 
to  the  members  for  their  information. 
Accounts  appearing  on  the  monthly 
consolidated  report  will  not  be  en- 
titled to  purchase,  except  for  cash, 
from  any  member  of  the  group  until 
the  overdue  accounts  have  been  paid 
and  until  sufficient  time  has  elapsed 
to  permit  the  secretary  to  receive  and 
distribute  reports  of  such  payments. 
In  order  not  to  work  a  hardship  on 
anyone  and  to  enable  all  dealers  to 
better  their  condition  and  to  improve 
their  manner  of  payment,  the  mem- 
bers of  the  group  are  prepared  to  at- 
tempt to  arrange  terms  on  any  old  bal- 
ances that  now  exist,  so  that  current 
accounts  may  be  kept  open  and  the  old 
balances  gradually  reduced. 


A  flying  jobber  is  J.  W.  Shackleford, 
radio  department  manager  of  Baird 
Hardware  Co.,  Gainesville,  Fla.,  dis- 
tributors for  Fada  and  Sentinel.  Plane 
is  a  Taylor  Cub. 

Ben  Gross,  of  Gross  Sales,  Inc.,  New 
York  and  New  England  distributors 
for  Stromberg-Carlson,  was  one  of  the 
executives  to  take  part  in  an  official 
conference  at  Rochester,  N.  Y.,  on 
plans  for  introducing  the  firm's  new 
line.  Mr.  Gross  registered  special  en- 
thusiasm for  the  design,  the  price 
range  and  the  multiple  features  of  the 
new  models,  and  pointed  out  that  Laby- 
rinth radios  will  now  be  available  at 
the  lowest  prices  ever  offered  on  that 
merchandise. 

Robert  T.  Anderson,  service  man  for 
the  Harrisburg  Standard  Electric 
Corp.,  Harrisburg.  111.,  Crosley  dis- 
tributors, has  been  selected  for  the  an- 
nual Paley  Award  for  "hams."  The 
award  is  made  each  year  by  CBS 
president  William  S.  Paley,  for  the 
"most  outstanding  public  service."  Mr. 
Anderson  was  cited  for  his  work  in 
connection  with  the  evacuation  of  the 
residents  of  Shawneetown,  111.,  during 
the  1937  flood.  Formal  presentation  of 
the  award  will  be  made  early  in  July, 
at  CBS  studios  in  New  York. 

Roscoe  E.  Magee  Co.,  London,  Ky., 
are  now  a  strictly  wholesale  firm,  cov- 
ering eastern  and  central  Kentucky, 
western  Virginia  and  eastern  Tennes- 
see. They  are  distributors  for  Thor- 
darson,  Meissner,  Tobe  DeutscUmann, 
Clarostat  and  Burgess. 


JFD  1938  Auto  Radio  Antennas 


15  MOST  POPULAR  TYPES 

Double  grip  all  rubber  covered 
running  board  antennas  .  .  .  Cowl 
antennas  .  .  .  Four  different  top- 
pers—  fit  all  cars  .  .  .  Door  hinge 
antennas  .  .  .  Bumper  antennas 
.  .  .  Special  insulators  for  Olds- 
mobile  and  Buick  cars. 


Ask 

for  Our 

Complete 

Catalog 


J.  F.  D. 

Manufacturing 

Company 

4111  Ft.  Hamilton  Pkwy. 

Brooklyn,    N.    Y. 

Export  Dept. 

116  Broad  St.,  New  York 

U.  S.  A. 

Cable:  ICARAD,  N.  Y. 


62 


Radio  Today 


Important  diners  at  the  RCA  jobbers  convention,  Atlantic  City.    From 

left,  Tom  Joyce,  advertising  manager;  jobber  guests  Hyman  Shapiro, 

Newburgh,   N.   Y.;   W.   E.   O'Connor,   Washington,   D.   C;   and   John 

Wyatt  of  Richmond,  Va. 


Wilkinson  Bros.,  the  Dallas,  Tex., 
distributors  formerly  located  at  2501 
Commerce  St.,  are  moving  into  a  big 
new  building  of  their  own  at  2406-08 
Ross  Ave.  The  new  quarters  are  twice 
the  size  of  the  old  store,  and  feature 
all  modern  facilities  for  servicing  all 
branches  of  radio,  such  as  service- 
men, dealers,  broadcasting  stations, 
PA  engineers,  industrial  labs  and  radio 
amateurs.  Elliott  Wilkinson  says  that 
"it  means  a  new  obligation  to  our  cus- 
tomers." Staff  includes  R.  E.  Gray, 
Mrs.  Ruby  Holcombrink.  L.  H.  Wilkin- 
son, Mrs.  Billye  Chrisman,  C.  G.  Engel- 
hart,  R.  S.  Benton,  Jr.,  Noel  McKey, 
S.  Allen  Baker,  A.  C.  Murder,  Jack 
Whitaker,  Frank  Fox  and  Paul  Gates. 

New  and  larger  quarters  have  been 
occupied  by  the  Illinois  Condenser  Co. 
at  1160  N.  Howe  St.,  Chicago.  Accord- 
ing to  execs  J.  J.  Kurland  and  J.  K. 
Kurland,  the  expansion  program  will 
include  the  building  of  a  complete  line 
of  types  of  service  condensers,  an  ex- 
clusive jobber  retail  business,  and 
"better-engineered  quality  products  at 
lower  prices." 

Group  of  15  sales  representatives  on 
the  Johnson  Space  Cooler  and  on  the 
Briggs  refrigerator  met  recently  at 
Galesburg,  111.,  for  a  two-day  confer- 
ence with  factory  execs.  Purpose  was 
to  acquaint  the  field  force  with  the 
capabilities  of  the  Cooler,  to  outline 
promotion  plans,  etc.  It  was  an- 
nounced that  to  meet  the  orders  on 
the  product,  plans  have  been  made  to 
double  production.  Johnson  executives 
at  the  meeting  included   C.  A.   Thom- 


son, J.  E.  Amies,  J.  F.  Furry,   S.  F. 
Briggs  and  P.  A.  Tanner. 

C.  R.  Rogers  Co.,  the  Philco  dis- 
tributors of  Pittsburgh,  Pa.,  have  wound 
up  a  "Traveling  Deluxe  to  the  Wilds 
of  Canada"  contest  for  dealers,  their 
wives,  sales  managers  and  retail  sales- 
men. The  guests  will  have  a  special 
scenic  trip  with  stops  at  Niagara  Falls, 
the  Land  of  Lakes.  Wilds  of  Canada, 
and  at  Huntsville  and  at  Toronto,  Can- 
ada. C.  F.  Gaylord  and  J.  W.  Rondel 
made  the  plans,  complete  with  golf, 
swimming,  boating,  dinners,  parties, 
etc. 

Over  100  jobbers  have  taken  on  the 
James  Tibrapower  units,  according  to 
news  from  Pauley-James  Corp.,  makers 
of  auto  radio  vibrators  at  4619  Ravens- 
wood  Ave.,  Chicago.  Sales  effort  was 
started  Mar.  15.  Added  to  the  James 
line  are  12  new  types;  the  total  is  now 
20.  Zinc  container  models  are  now 
produced  with  removable  bases,  de- 
signed for  speed  and  convenience  for 
servicemen. 

Brown  Supply  Co.,  St.  Louis,  Mo., 
will  now  distribute  Stromberg  Carlson 
sound  equipment;  last  winter  the  St. 
Louis  jobber  firm  became  a  distributor 
for  the  SC  line  of  radios.  Kenneth 
Gillespie  is  sales  engineer  of  the  com- 
pany, Fred  Wiebe  is  vice-president. 

C.  M.  Wilson,  formerly  sales  man- 
ager for  the  General  Electric  radio 
sales  division,  Bridgeport,  Conn.,  is 
now  the  GE  district  appliance  sales 
manager  in  New  England,  with  head- 
quarters in  Boston.  He  succeeds  M.  B. 
Connolly,  who  resigned. 


Jarvette  'Rotary  Converters 

FOR  CONVERTING  D.C.  TO  fl.C. 

•  Built  especially  for  radio  and  sound  apparatus — cap- 
acities 110  to  3250  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service — 
used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus — in  use  all  over  the  world* 

WHY  EXPERIMENT  —  INSIST  ON  fl  JflNETTE 

ASK    FOR    BULLETIN    13-1 


Jarvette  Rlaiuifaeturiwi;  Company 

556-558  liJest  Ttloncoe  Slceet  CKicaoo,  III.  IX.  S.  Jl. 


Ask  Your  Jobber 

foi  the 

NEW  CENTRALAB 

Volume  Contiol  Guide 

Again  .  .  .  the  service- 
men's most  popular  guide 
.  .  .  now  available  .  .  .  big- 
ger and  better  than  ever. 

Lists  10,000  models!  .  . 
240  pages  .  .  .  more  than 
400  types  of  radios  .  .  . 
complete  line  of  midget 
Radiohm  Replacements  . .  . 
Also  a  complete  listing  of 
all  other  Centralab  prod- 
ucts: switches,  resistors, 
sound  projection  controls, 
and  the  new  Centralab 
wire-wound  Radiohm. 


FREE:   At  your  jobber  .  .  .  or 

send  10c.  to  cover  handling  and 

mailing  to   Centralab 


J' 


^ 


X 


Meet    Centralab    at    the 

National  Radio  Parts 

Trade  Show 

Chicago      -      June  8-11 


jT 


Cehtsalab 


Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 


June,  1938 


63 


TALK  OF  THE  TRADE 


John  F.  Ditzell,  sales  manager  for 
Stewart-Warner  radios  and  refriger- 
tors,  in  a  feature  address  to  the  SW 
distributors  covention  May  31,  declared 
that  his  company  expects  a  radio  vol- 
ume "above  the  general  level  of  busi- 
ness." He  pointed  out  that,  to  most 
people,  radios  have  become  a  necessity 
and  many  obsolete  sets  will  be  re- 
placed regardless  of  economic  condi- 
tions. He  said  that  fewer  models, 
lower  prices,  and  "gadgetless"  design 
were  being  featured  in  1939  SW  poli- 
cies because  "necessitous  shopping 
means  close  appraisal  of  value." 

Electrical  Appliance  Dealers  Associa- 
tion of  Brooklyn,  N.  Y.,  held  its  sixth 
annual  dinner-dance  and  entertain 
ment  May  25  with  some  1,000  guests 
on  hand.  Plans  for  the  affair  were 
made  by  Sam  Klein,  James  J.  Schneer, 
Max  J.  Zimmer,  Percy  Peters,  Albert 
Bernhard  and  A.  H.  Grafenstadt.  The 
evening  included   a  14-act  floor  show. 

H.  A.  Pope,  credit  manager  of  Na- 
tional Union  Radio  Corp.,  has  been 
elected  to  a  three-year  term  as  a  trus- 
tee of  the  New  Jersey  Creditmen's  As- 
sociation. 

Wincharger    antenna    towers    made 


their  first  appearance  in  the  television 
industry  recently  when  one  of  the  out- 
fits was  installed  at  the  experimental 
building  of  the  Hahn-McPherson  In- 
dustrial Design  Laboratories,  Hatboro, 
Pa.  The  tower  is  used  for  a  television 
type  antenna,  as  well  as  for  wind  in- 
dicating and  recording  apparatus. 

Three  headquarters  groups  from 
General  Electric  are  now  on  tour  of 
43  principal  cities,  holding  distributor 
meetings,  and  each  featuring  radio 
"scoops,"  which  include  keyboard 
touch  tuning,  program  pre-selector,  and 
the  "beam-scope."  Dealer  meetings  will 
follow  in  each  area,  following  manager 
E.  H.  Vogel's  promise  of  early  deliv- 
eries. 

Schedule  of  the  first  group,  headed 
by  P.  F.  Hadlock,  A.  A.  Brandt  and 
C.  H.  Bell,  runs  from  May  24  to  June 
10.  The  second  group  is  headed  by 
E.  H.  Vogel,  C.  T.  Wandres  and  R.  M. 
Hoey,  and  operates  from  May  24  to 
June  15.  Leaders  of  the  third  group 
are  H.  R.  Shaw,  J.  Wood,  E.  N.  Samp- 
son and  R.  J.  Meigs,  active  May  24  to 
June  11. 

Vice  -  president  and  Development 
Engineer  E.  L.  Barrett  of  Utah  Radio 


Benjamin  Ginsburg,  of  Smith- 
Benny  Sales  Co.,  NYC.  The 
firm  is  going  to  town  as  eastern 
representatives  for  the  Steem- 
Electric  iron.  "Benny"  has  20 
some  years  of  radio  experience. 


Products  Co.,  Chicago,  is  now  on  a 
tour  of  Europe  accompanied  by  Sylvan 
Ginsbury  of  57  A  Blvd.  Botanique, 
Brussels,  Belgium,  Utah's  European 
export  manager.  The  tour  is  made  to 
introduce  several  new  Utah  products, 
including  the  motor  driven  push  but- 
ton tuning  unit. 


CAL&P 


TO  F/X  «€. 

KAN0, 


She  liked  his 

work    so   called 
him    back  again 
and   again.  That 
is  how  a  perma- 
nent   business    is 
up.     Replacement 
parts    are    the    smallest 
part   of   the   cost   of   a 
service    call.     The    ser- 
vice   men    can't   afford 
to    use   other   than    the 
most  dependable.     That  is  why 
ever  increasing  demand. 


Ward  Leonard  is  enjoying 


WARD  LEONARD  ELECTRIC  CO. 

40  SOUTH  STREET,  MOUNT  VERNON.  N.  Y. 

Please  send  me  Price  List  Bulletin  S07A. 

Name     

Address     

C'ty State 

Jobber's  Name    .'..' 


p.v. 


•ST 

TOO 


An  Amazing  Improvement 
in  Electrolytic  Condensers 


Vv\    o*eV* 


T"\UMONT  engineers  produced 


>£!*•■ 


and  patented  the  world's 
first  electrolytic  condenser  in 
common  use  today.  Same  engi- 
neers, after  five  years  research 
now  produce  FIRST  SUPER  HIGH 
VOLTAGE  Electrolytic.  Reheals 
if  overloaded  or  punctured.  This  patented  fea- 
ture is  found  only  in  DUMONT  Condensers. 
Used  by  U.  S.  Government — a  real  test  of  quality. 
Used  in  highest  priced  radio  receivers,  yet  sold 
at  very  attractive  price.  Try  some  today  and  be 
convinced.     FULLY  GUARANTEED  for  1  YEAR. 

Manufactured  by 


UMONT  ELECTRIC  C0.,Ine 

514-516  Broadway,  New  York  , 

WRITE     FOR   CATALOGUE  J 

AND  NAME  OF  NEAREST  JOBBER 


64 


Radio  Today 


A  new  business  and  a  woman  at  the  head  of  it — Carolina  Radio  Supply, 
Greenville,  S.  C,  opened  by  Miss  Emma  Flinkingshelt.  Also  shown  are 
counter  man  R.  W.  Hines  and  outside  salesman  E.  L.  Bell.  Besides  parts 
lines,  the  firm  will  handle  Fada  radios  and  Sylvania  tubes  exclusively. 


R.  E.  Kane,  -whose  notable  career 
as  a  merchandising  executive  began  in 
1919,  has  been  named  by  Oalvin  Mfg. 
Corp.,  makers  of  Motorola  car  and 
home  sets,  as  eastern  manager  for 
home  receivers  covering  the  states  of 
New  York,  Pennsylvania,  Delaware, 
Maryland,  Virginia  and  New  Jersey. 
Mr.  Kane's  early  experience  was  with 
Sherman  Clay  &  Co.,  San  Francisco; 
he  later  became  an  RCA  executive  and 
was  once  in  charge  of  that  firm's  radio 
sales  in  an  area  covering  27  states. 
For  the  past  two  years  he  has  been 
central  division  manager  for  Grunow; 
his  affiliation  with  Motorola  began 
June  1.  Murray  Yeomans  continues  as 
Motorola's  auto  radio  division  manager 
in  the  eastern  area. 

Employes  of  Standard  Transformer 
Corp.,  Chicago,  223  of  them,  have  re- 
cently become  eligible  to  life  insurance 
amounts  ranging  from  $500  to  $3,000, 
as  a  result  of  a  group  policy  plan  for 
which  the  firm  assumed  the  entire  ex- 
pense. 

Tube  sales  manager  L.  W.  Teegarden 
of  RCA  Victor  has  announced  a  nation- 
wide contest  for  radio  tube  dealers, 
prizes  to  be  awarded  for  the  50  most 
accurate  answers  to  the  question, 
"How  much  money  has  been  spent  to 
advertise  the  name  RCA  Victor  in  the 
last  ten  years?" 

W.  H.  Saladin.  proprietor  of  the 
Saladin  Music  &  Gift  Store  at  128  E. 
Main  St.,  Santa  Maria,  Calif.,  will  build 
a  $35,000  business  building  at  700  S. 
Broadway,  that  city,  and  will  move  his 
store  to  that  address.  When  the  struc- 
ture is  completed,  in  about  3  months, 
space  will  also  be  rented  to  six  other 
merchants. 

Arcturus  Radio  Tube  Co.,  Newark, 
N.  J.,  has  been  given  an  Award  of 
Merit  for  achieving  a  perfect  safety 
record,  by  the  New  Jersey  State  Labor 
Dept.  The  award  covers  the  year  1937, 
and  is  a  source  of  special  pride  for 
Arcturus  officials  because  "recent  de- 
velopments have  kept  the  plant  run- 
ning at  its  highest  speed  for  a  number 
of  years  past." 

Downtown  salesrooms  for  the  Uni- 
versal Microphone  Co.,  Inglewood.  Cal., 
have  been  opened  at  1005  Beaux  Arts 
Bldg.,  Los  Angeles,  with  factory  repre- 
sentative S.  E.  Shapiro  in  charge. 


President  L.  K.  Marshall  of  Ray- 
theon Mfg.  Co.,  Newton,  Mass.,  has 
been  named  executive  voting  represen- 
tative of  his  company  in  the  radio 
apparatus  and  electronic  tubes  section 
of  the  National  Electrical  Manufac- 
turers' Association. 

Commander  Eugene  F.  McDonald, 
president  of  Zenith,  recently  enter- 
tained members  of  the  Gridiron  Club 
of  Washington  aboard  his  yacht  "Miz- 
pah"  on  a  4-hour  trip  down  the  Po- 
tomac. Other  guests  included  Judge 
E.  O.  Sykes,  Commander  T.  A.  M. 
Craven  and  Col.  Thad  H.  Brown,  all 
of  the  FCC;  Col.  Charles  H.  March,  of 
the  Federal  Trade  Commission;  Rep- 
resentative Bert  Snell,  House  Repub- 
lican Leader,  of  New  York;  Gutzon 
Borglum.  sculptor;  Maj.  Gen.  Holcomb, 
Commandant,  U.  S.  Marine  Corps; 
Bond  Geddes,  vice-president,  Radio 
Manufacturers'  Association,  and  E.  H. 
Beck,  managing  editor.  Chicago  Tri- 
bune. 

Kenyon  Transformer  Co.,  Inc..  840 
Barry  St.,  N.  Y.  C,  recently  appointed 
two  new  representatives  for  the  Pacific 
Coast  territory.  E.  P.  Demarest.  Syl- 
vania Pacific  Co.,  1127  Venice  Blvd., 
Los  Angeles,  Calif.,  will  cover  the  en- 
tire state  of  California,  while  George 
D.  Morris,  307  Wall  St..  Seattle,  Wash., 
will  cover  the  states  of  Washington, 
Oregon,  Montana,  Idaho  and  Southern 
British  Columbia. 

During  the  second  period  for  which 
Stromberg  -Carlson's  sales  manager, 
George  A.  Scoville,  took  over  sales  di- 
rection for  the  firm,  10  SC  sales  rep- 
resentatives and  their  wives  were  no- 
tified that  they  had  won  "mystery" 
prizes.  They  are:  Mr.  and  Mrs.  A.  C. 
Barg,  Chicago;  Mr.  and  Mrs.  J.  A. 
Frye,  Detroit;  Mr.  and  Mrs.  S.  B. 
Manson,  Rochester,  N.  Y.;  Mr.  and 
Mrs.  J.  S.  Mills,  New  York;  Mr.  and 
Mrs.  R.  G.  Bookless,  San  Francisco; 
Mr.  and  Mrs.  Lawrence  Loveless,  Bath, 
N.  Y. ;  Mr.  and  Mrs.  L.  H.  McMillan, 
Chicago;  Mr.  Carl  Erickson,  Boston; 
Mr.  and  Mrs.  J.  E.  McCauley,  Pitts- 
burgh, and  Mr.  and  Mrs.  F.  G.  Cook, 
New  Haven,  Conn. 

Caspar  Radio  Co.,  Homestead,  Pa., 
whose  store  was  recently  destroyed 
by  fire,  now  occupy  new  quarters  at 
601  E.  8th  St. 


f      List  Prices 
Complete 
Model  a      $25.00 
Model  B      $40.00 
Model  C     $75.00 
Model  D    $175.00 


FIDELITY!  TONE  RANGE!  DISTOR- 
TIONLESS POWER!  BEAUTY  OF  DE- 
SIGN and  EASE  OF  INSTALLATION! 
IT'S  ALL  THERE  IN  A  VIBRALOC  .  .  . 

Stndio  or  Stnditim  corernge  with  the 
same  reproducer  .  .  .  "if  you're  doubt- 
ful .  .  .  we've  got  the  proof  .  .  . 
just  write." 

Patented  Acoustical  features  incorporated  in  the 
new  VIBRALOC  REPRODUCER  reveal,  for  the  first 
time,  brilliant  definition  in  tone  blending  at  any 
volume  level.  The  usual  beam  or  searchlight  effect 
is  not  present  in  the  VIBRALOC  method  of  sound 
distribution,  resulting  in  freedom  from  reflection 
distortion  and  other  acoustical  troubles. 
Locking  mechanical  vibrations  at  the  source  of  audio 
sound  distribution  eliminates  disturbance  of  the 
oriainal  wave  form,  permitting  movement,  into  free 
space,  minus  pressure  re-shaping  or  the  effects  of 
resistance  to  coil   movement. 

Introductory  Samples,  Model  A, 
89..1U  net.  Casli  with  order  or 
deposit    required. 

JOBBERS!!    DEALERS!! 

Exclusive  Territories  Available! 
Catalogs  &  Proposition  Upon  Request. 


yiw  WARD  AERIAL 


Here's  a  money  -  maker 
for  you !  WARD'S  new 
Model  5XX,  a  3-section  tel- 
escopic side  -  cowl  aerial, 
sells  for  only  $2.95  complete  with  36" 
approved  Low  Loss  Shielded  Cable  and 
insulated  lower  bolt  assembly,  and  still 
makes  you  a  handsome  profit  on  every 
tale!  Made  of  Admiralty  metal.  Rust- 
proof.    Easily  installed. 

Write  today  for  free  catalog  and  com- 
plete details  on  the  WARD  line  of  low- 
priced,  fast-selling  car  aerials. 

See  us  at  the  Chicago  Show, 
215-217  Hertz  Avenue 


TOWARD  PRODUCTS  G*p, 

WARD   BUILDING:  CLEVELAND,   OHIO 


June,  1938 


65 


Servicemen! 

$75  WORTH  OF  MATERIAL 
AND  SERVICE  FREE! 

Give  YOV  a  monthly  Advanced  Extension  Course  on 
the  current  developments  in  radio  servicing.  THIS  INFOR- 
MATION IS  AVAILABLE   ONLY  TO  RSA   MEMBERS! 

Give  YOV  monthly  Advertising  and  Business  Promo- 
tion ideas  to  increase  your  business  and  make  it  more 
profitable. 

Include  YOV  as  a  "REGISTERED  AND  QUALIFIED 
SERVICEMAN"  in  the  big  advertising  and  publicity  cam- 
paign going  on  in  newspapers  and  being  broadcast  over 
the  air! 

Give  YOV  a  subscription  to  "The  Radio  Serviceman" — 
the  Association's  monthly  magazine. 

Give  YOV  a  Certificate  of  Merit  to  hang  in  your  shop. 

Give  YOV  a  pocket  card  of  credentials. 

Give  YOV  our  big  expert  technical  staff  as  a  depart- 
ment in  your  service  business.  We  will  give  you  the  right 
answer  to  your  "impossible"  service  problems. 

Give  YOV  (if  you  belong  to  a  local  servicemen's  club) 
access  to  our  National  Speakers'  Bureau — famous  speak- 
ers for  your  meetings. 

Give  YOV  advance  technical  information  on  new 
circuits. 

$75  Worth  of  Material  and  Service  Free 

The  RSA  is  an  independent  organization,  owned  and  operated — 
not  for  profit — by  its  members.  It  has  the  backing  of  the  entire 
Radio  Industry  in  its  aim  to  make  servicing  a  real  business,  with 
regular   hours,    and    with   a    real   profit    at    the    end    of   each    week! 

The  RSA  is  already  the  largest  and  most  powerful  group  the  ser- 
vice business  has  ever  seen.  JOIN  NOW  and  get  in  on  all  its  benefits ! 

RADIO  SERVICEMEN  OF  AMERICA 

JOE  MARTY,  JR.,  Executive  Secretary,  304  S.  Dearborn  St.,  Chicago 

• MAIL    THIS    COUPON  • 

RADIO  SERVICEMEN  OF  AMERICA,  INC. 
304  South  Dearborn  St.,  Chicago,  111. 

Gentlemen : 

I  hereby  make  application  for  membership  in  the  Radio  Service- 
men of  America. 

Name    

Home  Address 

City State 

Firm  Name    

Address     

.  .  ./  am  enclosing  $2.00  National  Yearly  Dues. 
...BUI  me  $2.00  National  Yearly  Dues. 


Tj  TRADE  FLASHES 

The  advancement  of  Roy  Neusch  to 
the  position  of  general  sales  manager 
of  the  Clarion  Institute  of  Sound  En- 
gineers has  been  announced  by  Hubert 


Roy   Neusch,   of   Clarion   Insti- 
tute of  Sound  Engineers. 


L.  Shortt,  president  of  the  Transformer 
Corp.  of  America,  69  Wooster  St.,  New 
York  City.  Mr.  Neusch  has  been  with 
TCA  since  the  firm  began,  and  has  had 
long  experience  in  the  sound  re-en- 
forcement field.  President  Shortt  re- 
ports increased  national  interest  in  the 
C.I.S.E.,  and  mentions  increased  pro- 
duction facilities  to  meet  the  demands 
of  the  Institute's  members. 


The  new  export  sales  manager  for 
Utah  Radio  Products  Co.  is  Harry  J. 
Scheel,  according  to  news  from  sales 
manager  Oden  Jester.  Mr.  Scheel  was 
formerly  export  manager  for  Grigsby- 
Grunow,  where  he  hiked  the  foreign 
business  to  over  one  million  dollars 
annually.  Addition  of  an  export  sales 
department  under  his  direction  at 
Utah  will  identify  the  firm  with  im- 
proved service  to  buyers  abroad. 


The  Radio,  Refrigeration,  Sporting 
Goods  and  Electrical  Appliances  Divi- 
sion of  the  joint  Campaign  of  the 
United  Palestine  Appeal  and  Joint 
Distribution  Committee  has  announced 
an  industry  entertainment  and  dance 
to  be  held  at  the  Hotel  Astor  June  21. 
According  to  tentative  plans,  the  com- 
mittees are  as  follows:  Arrangements, 
Max  Kassover,  chairman,  Jules  Smith 
and  D.  W.  May.  Tickets:  Louis  Sack, 
chairman.  Harry  Stein  and  Sam  Saltz- 
man.  Manufacturers'  Division:  Perry 
Saftler,  chairman,  Harvey  Tullo. 
Henry  Halpern.  Jobbers  Division: 
Ben  Gross,  chairman,  B.  D.  Colen,  Hal 
Sheer,  Irving  Sarnoff  and  Mr.  Olstein. 
General  Dealers :  Brooklyn  and 
Queens.  Louis  Le  Winter;  Manhattan, 
Louis  Titefsky;  Bronx,  Jack  Shanek 
and  Jack  Messinger;  Westchester  and 
White  Plains,  Ray  Kline  and  Mr.  Ma- 
zur.  Sporting  Goods  Dealers:  Henry 
Model. 


66 


Radio  Today 


NEW  BOOKLETS 


"Electrolytic  Capacitors,"  a  full  size 
book  on  the  theory,  construction,  char- 
acteristics and  applications  of  all  types 
of  electrolytic  capacitors  has  been 
written  by  Paul  McKnight  Deeley, 
chief  engineer  of  Cornell-Dubilier 
Electric  Corp.'s  electrolytic  division. 
Detailed  data  is  presented  for  both 
radio  and  electrical  men.  The  volume 
is  available  from  the  company's  head- 
quarters at  South  Plainfield,  N.  J.. 
for  $3. 

A  new  Parts  List  has  been  issued 
by  Emerson  Radio  &  Phonograph 
Corp.,  Ill  Eighth  Ave.,  New  York.  N. 
Y.  Numbers  and  prices  for  all  parts 
for  all  Emerson  models  released  prior 
to  May  1st,  1938,  are  given  in  booklet 
form. 

A  catalog  made  up  exclusively  of 
cameras  and  photographic  supplies  has 
been  published  by  Wholesale  Radio 
Service  Co.,  Inc.  It  contains  material 
for  veteran  fans,  dope  for  beginners, 
data  on  picture-taking  procedure,  etc., 
and  is  available  free  from  any  of  the 
company's  seven  offices. 

Eastern  Mike  Stand  Co.,  56  Christo- 
pher Ave.,  Brooklyn,  N.  Y.,  have  re- 
leased two  catalog  sheets  covering  their 
line  of  microphone  stands  and  acces- 
sories. One  shows  and  describes  vari- 
ous types  of  floor  and  table  stands,  and 
is  intended  for  wall  mounting  in  the 
sound  room.  Noiseless  operation,  non- 
dropping  mike  rods  and  adjustable 
pressure  chuck  locks  are  featured.  The 
other,  catalog  is  a  4-page  standard  re- 
lease for  the  jobber's  file. 

Pioneer  Gen-E-Motor  Corp.,  466  W. 
Superior  St.,  Chicago,  has  issued  two 
new  booklets.  One  is  titled  "Pincor 
Silver  Brand  Dynamotors"  ("B"  Power 
Supply  Equipment  for  Sound  Systems, 
Police  Units,  Air  Craft,  Marine  and 
Broadcast  Service)  and  includes  data 
sheets  for  each  of  the  major  types  of 
units.  These  sheets  give  performance 
characteristics,  capacities,  ratings,  etc., 
and  are  described  as  a  "first"  for  help- 
ful completeness.  The  other  booklet 
gives  the  dope  on  "Gold  Crown  Heavy 
Duty  Power  Plants,"  for  farms,  homes, 
rural  business,  resorts,  construction 
work,  boats,  and  industrial  needs. 

First  issue  of  the  "Weston  Pointer," 
illustrated  journal  to  be  released  fre- 
quently from  Weston  Electrical  In- 
struments Corp.,  614  Frelinghuysen 
Ave.,  Newark,  N.  J.,  appeared  recently 
with  features  on  new  developments 
and  technical  aid  for  radio  service- 
men. It  will  be  sent  free  to  active 
radio  men  and  will  include  an  "idea 
box"  to  which  servicemen  are  invited 
to   contribute. 

"Hammarlund  Short  Wave  Manual," 
the  1938  edition,  with  32  pages,  is 
being  released  by  the  company  from 
424  W.  33rd  St.,  New  York,  N.  Y.,  for 
10c.  It  features  new  receivers,  trans- 
mitters and  associated  equipment;  it 
carries  short  wave  station  lists  and 
tuning  hints  for  amateurs.  Profusely 
illustrated. 


New  literature  released  by  Thor- 
darson  Electric  Mfg.  Co.,  500  W. 
Huron,  Chicago,  includes  (1)  an  amp- 
lifier   catalog    illustrating    6    models, 

(2)  the  complete  catalog  of  radio 
amplifier    transformers,    chokes,    etc., 

(3)  a  bulletin  with  complete  descrip- 
tions of  foundation  units,  and  (4)  the 
Radio  Servicing  Guide. 

Catalog  No.  14,  on  the  subjects  of 
automatic  stampings,  wire  forms,  dies, 
cadmium  plating,  nickel  plating  and 
hot  tinning,  is  being  re-issued  by  Zier- 
ick  Mfg.  Corp.,  385  Gerard  Ave.,  New 
York,  N.  Y..  with  two  supplementary 
sheets  added.  These  describe  new 
items. 

New  literature  on  the  mobile  public 
address  system  No.  172  is  available 
from  Operadio  Mfg.  Co.,  St.  Charles, 
111. 


NATIONAL  UNION  RADIO 
TUBE  MANUAL 

*  The  National  Union  Quick  Ref- 
erence Radio  Tube  Manual  is  designed 
to  supply  the  radio  set  engineer  with 
the  characteristics  of  all  types  of 
tubes  in  tabular  form. 

Grouped  Dy  function,  rather  than 
numerical-alphabetical  sequence,  'all 
the  tubes  used  for  a  certain  function 
are  found  in  one  section.  At  the  be- 
ginning of  each  section  there  is  a  gen- 
eralized discussion  pertaining  to  use 
of  the  tubes  in  that  section. 

Tubes  are  listed  in  the  following 
classifications:  Rectifiers,  triode  volt- 
age amplifiers,  pentode  voltage  ampli- 
fiers, power  amplifiers,  frequency  con- 
verters, duplex  tubes,  tuning  indi- 
cators. An  eighth  section  is  titled, 
"Design  Consideration,"  and  is  illus- 
trated by  charts. 

Book  has  169  pages,  is  paper  cov- 
ered and  has  spiral  binding.  Price  $1. 
Published  by  National  Union  Radio 
Corp.,  57  State  St.,  Newark,  N.  J.— 
Radio  Today. 


TELEVISION:  A  STRUGGLE 
FOR  POWER 

By  Frank  Waldkop  and  Joseph  Borkin 

The  purpose  of  this  writing  is  to  tell 
the  story  of  the  control  of  radio,  and  to 
associate  it  with  both  the  appearance 
and  the  control  of  television.  The  book 
would  like  to  be  sensational,  and 
carries  such  statements  as  "on  the  sur- 
face the  radio  business  is  a  raucous, 
gaudy  haggler's  bazaar,"  and  "it  is  a 
curious  fact  that  not  one  of  the  clear 
channels  is  dedicated  exclusively  to 
cultural  or  educational  pursuits." 

For  its  detailed  information  on  radio 
patents,  corporate  interests,  and  the 
politics  of  communication  in  this  coun- 
try, the  book  is  arresting.  The  authors 
say  that  television  "threatens  to  swal- 
low whole  industries"  and  that  it  ap- 
pears to  be  a  business  "that  cannot 
function  except  in  monopoly."  These 
conclusions  give  the  writers  a  swell 
chance  to  debunk,  to  warn,  and  to  pre- 
sent little-known  items.  They  do  it 
rather  sharply,  too. — William  Morrow 
&  Co.,  386  Fourth  Ave.,  New  York  City. 
$2.75. 


€390339 

Now  is  the  Time 

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"MULTICOUPLER" 
ANTENNA  SYSTEM 

Live  wire  radio  men  are  get- 
ting into  the  new  field  of 
installing  master  aerials  dur- 
ing the  dull  season. 

Master  antennae  are  not 
limited  to  apartment  build- 
ings. Private  residences  offer 
a  big  field. 

Install  the  new  all-wave, 
noise  reducing  antenna  sys- 
tem, employing  our  latest 
developments. 

Get  in  on  this  business  now. 
We  furnish  standard  instal- 
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you  have  a  particular  prob- 
lem, let  us  help  you.  Write 
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gpLJt* 


AMY,  ACEVES  &  KING,  Inc. 

U  West  42nd  Street,  New  York,  N.  Y. 

Consulting  Engineers  —  Specialists  in 
Antenna  Systems  —  Licensor  of  leading 
set  and  antenna  equipment  manufacturers. 


Everything  you  need  in  radio.  It's  all  In  tfata 
new      RADOLEK      RADIO      PROFIT      QUID!. 

Every  repair  part  for  every  receiver.  Ntwtrt 
radio  receivers.  New  1938  model  public  addren 
amplifiers,  outputs  for  5  to  100  watts.  New 
model  public  address  speakers.  Test  instrument. 
Technical  books.  Special  equipment.  Leading 
standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 

And  everything  under  one  roof.  You  get  what 
you  want  promptly,  and  exactly  what  you  want. 
Radolek's  immense  stock  plus  Radolek's  efficient 
organization  insures  you  fastest  service.  25,000 
service  men  depend  on  this  service  and  benefit 
by  Radolek's  lowest  prices.  Send  now  for  your 
copy  of  Radolek's  Radio  Profit  Guide.  It  will 
help  you  make  more  money. 

RADOLEK--- 

601  W.  Randolph,  Chicago,  Dept.  D-20 

Send  me  the  1938  Radolek  Radio  Profit  Guide  FREE.i 

Name    

Address    

Serviceman?  □         Dealer?  □         Experimenter?  Q 


June,  1938 


67 


•     INDEX     • 
TO  ADVERTISEMENTS 


Page 

AEROVOX    CORP 55 

AMPERITE    CO 39 

AMY,    ACEVES   &    KING,    INC 67 

ANDREA     RADIO    CORP 4 

BOGEN    CO.,    INC.,    DAVID 62 

BRUNO    LABORATORIES,    INC 53 

BRUSH    DEVELOPMENT   CO 59 

CENTRALAB      63 

CINAUDAGRAPH    CORP 61 

COMMERCIAL    CREDIT    CORP 2 

CONTINENTAL    CARBON,    INC 60 

CORNELL-DUBILIER    ELEC.    CORP 49 

CROSLEY    RADIO    CORP 25 

CROWE   NAME   PLATE   &   MFG.   CO 54 

DUMONT   ELEC.    CO.,    INC 64 

GALVIN    MFG.    CORP 3 

GENERAL    ELECTRIC    CO Cover  2 

HYGRADE    SYLVANIA    CORP 47 

INTERNATIONAL    RESISTANCE    CO 45 

JANETTE     MFG.     CO 63 

JFD    MFG.    CO 62 

KEN-RAD   TUBE   &   LAMP   CORP 55 

MALLORY  &  CO.,   INC.,   P.    R 1 

NATIONAL    UNION    RADIO    CORP 53 

OHMITE     MFG.     CO 5S 

ONAN    &   SONS,    D.    W 60 

PHILCO  RADIO  &  TELEV.  CORP.,  SET  DIV.  8 

PHILCO    RADIO  &  TELEV.  CORP.,  TUBE  DIV.  5 

PLEASANTAIRE    CORP 51 

PRESTO     RECORDING     CORP 48 

RADIART  CORP 57 

RADIO   CORP.   OF  AMERICA 6 

RADIO   SERVICEMEN    OF   AMERICA,    INC...  66 

RADOLEK      67 

RAYTHEON     PRODUCTION    CORP Cover  4 

RCA    MFG.   CO.,    INC 33,  34,  35,  36 

READRITE    METER    WORKS 52 

REGAL    AMPLIFIER     MFG.    CORP 61 

RIDER,    JOHN    F 50 

SONORA   RADIO   &  TELEV.   CORP 7 

STROMBERG-CARLSON    TELE.    MFG.    CO....  23 

SUPREME    INSTRUMENTS   CORP 30 

THORDARSON    ELEC.    MFG.   CO 56 

TRANSFORMER    CORP.    OF   AMERICA 54 

TRIPLETT   ELECTRICAL    INSTRUMENT   CO..  41 

TUNG-SOL  TUBE  &  LAMP  WORKS,    INC....  51 

VIBRALOC     MFG.     CO 65 

WARD    LEONARD    ELEC.    CO 64 

WARD    PRODUCTS    CORP 65 

WESTON    ELEC.    INSTRUMENT   CORP 29 

WINCHARGER    CORP Cover  3 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against 
the  possibility  of  an  occasional  change 
or  omission   in   the  preparation   of  this   index. 


PHILCO  ADDS 

AIR-CONDITIONING 


In  introducing  the  new  Cool-wave 
unit,  Larry  E.  Gubb,  president  of  Philco 
Radio  &  Television  Corporation,  de- 
clared: "Air-conditioning  for  almost 
everyone  is  the  giant  American  indus- 
try of  the  near  future.  It  will  be  the 
center  of  the  next  big  business  upturn. 

"Our  whole  American  business 
growth  is  based  upon  the  creation  of 
greater  comfort  for  the  individual,  and 
air-conditioning  will  very  soon  become 
a  necessary  comfort,  instead  of  a  de- 
sirable convenience,  in  the  average 
American  home." 

"Because  of  this,  Philco  has  entered 
the  air-conditioning  field,"  Gubb  con- 
tinued. "Like  radio,  air-conditioning 
is  strictly  a  twentieth-century  develop- 
ment—and like  radio,  air-conditioning 
will  soon  become  a  requisite  for  the 
average  home. 

"The  men  and  women  who  have  en- 
joyed the  comfort  of  an  evening  in  an 
air-conditioned  theatre  are  no  longer 
content  to  return  to  swelter  in  hot 
bedrooms.  The  man  who  lunches  in 
an  air-conditioned  restaurant  now  looks 
with  dread  at  the  thought  of  returning 
for  the  rest  of  the  day  to  a  hot,  humid 
office. 

"These  people  all  know  that  air-con- 
ditioning is  the  solution  —  providing 
they  can  get  it  in  an  uncomplicated, 
small-sized  form  for  their  private  use." 

Philco,  Gubb  stated,  has  met  that 
need  with  Cool-wave.  This  new  air- 
conditioner  requires  only  one  electrical 
connection  and  no  water  supply  piping. 
No  complicated  installation  is  needed, 
and  placed  in  an  individual  room,  the 
Cool-wave  unit  is  guaranteed  to  give 
all  the  coolness  of  the  melting  of  three- 
quarters  of  a  ton  of  ice. 

The  Cool-wave  unit  is  capable  of 
wringing  more  than  one  full  quart  of 
water  per  hour  out  of  room-air  over- 
loaded with  humidity,  while  continu- 
ously pouring  fresh  air  into  the  room. 

The  Cool-wave  unit  is  approved  by 
Philco  engineers,  distributed  by  Philco 
and  will  be  sold  exclusively  by  Philco 


dealers  throughout  the  country  and  in 
Canada.  It  is  manufactured  expressly 
for  Philco  by  the  York  Ice  Machinery 
Company,  which  has  set  up  huge  de- 
partments in  its  plants  for  the  exclu- 
sive construction  of  Cool-wave  air- 
conditioners. 

INTRODUCING  THE 

TELEVISION  CORP.  OF  AMERICA 

Following  the  television  experimen- 
tation of  Communication  Systems,  Inc., 
the  firm  has  now  incorporated  under 
the  name  Television  Corp.  of  America, 
with  offices  at  130  W.  56th  St.,  New 
York  City.  The  company  attracted 
wide  attention  recently  by  marketing 
television  receivers  for  $125,  $195,  and 
$250,  and  now  creates  another  stir  in 
the  industry  by  placing  its  sets  in  the 
biggest  department  stores  in  the  New 
York  metropolitan  area  and  in  Boston 
for  public  demonstrations. 

TCA  president  is  S.  M.  Saltzman. 
C.  H.  Sterenfeld  is  vice-president  in 
charge  of  sales ;  Louis  W.  Parker,  chief 
engineer;  E.  Nathenson,  director  of  ad- 
vertising and  publicity. 

Although  the  firm  has  announced 
that  the  television  sets  will  be  sold 
only  in  areas  where  satisfactory  tele- 
vision signals  can  be  picked  up,  TCA 
offices  have  already  been  flooded  with 
orders  for  the  instruments. 

A  new  radio  retail  outfit  to  he  or- 
ganized in  Los  Angeles  is  the  Piatt 
Radio  Stores,  with  a  board  of  direc- 
tors including  C.  J.  Kenny,  V.  E.  Fay 
and  J.  R.  Lineburg. 

California  dealer  David  E.  Vrner, 
1925  Eye  St.,  Bakersfield,  is  offering  a 
new  Emerson  radio  for  $1  to  the 
buyers  of  new  refrigerators  or  other 
major  appliances. 

Arthur  A.  Brisch,  2338  Highland 
Ave.,  Los  Angeles,  has  obtained  a  cer- 
tificate to  conduct  business  under  the 
firm  name  of  Best  Radio-Electrical  Co., 
2613  W.  Washington  Blvd.,  Los  An- 
geles. 


At  Chicago,  800  Philco  distributors  and  guests  enthusiastically  greeted 

"Cool-wave",  here   shown  with  President  Gubb,   Sayre   Ramsdell,  and 

York    officials.     The   walnut-finished    steel    cabinet   occupies   4   sq.    ft. 

of  floor  space. 


68 


Radio  Today 


50%  MORE 


ELECTRIC 
POWER 


NEW  MODEL  '39 


fj^  6  VOLT-DELUXE 


VUw  PROPELLER: 

15%  to  25%  more  efficient 

VUw  GENERATOR: 

15%  to  25%  more  powerful 

VUw  OUTPUT: 

30%  to  50%  more  power 

This  new  1939  Six-Volt  Wincharger  has  all  the 
proved  dependable  features  of  the  world-famous 
Model '  3  7  PLUS  an  improved  1 5  %  to  25%  more 
powerful  generator  PLUS  a  15%  to  25%  more 
efficient  propeller.  It  actually  generates  30%  to 
50%  more  electricity  which  means  extra  current 
for  more  hours  of  radio  operation  and  more 
lights.  But  that's  not  all!  The  new  Model  '39 
starts  charging  in  a  iVi  to  8  mile  breeze  —  one 
mile  per  hour  lower  wind  velocity  than  any  other 
previous  model.  And  there  are  many  OTHER 
PLUS  FEATURES  including  an  enclosed  weather- 
protected collector  ring  with  double  carbon  brushes 
—  new  sturdier  4-legged  tower — simpler  tower 
construction  for  easier  installation — and  large 
tower  feet  for  easier  mounting.  The  most  power- 
ful, thoroughly  dependable  radio  wind-charger 
ever  built! 

Write  or  Wire  for  Complete  Details 

CORPORATION    •    SIOUX  CITY,  IOWA,  U.  S.  A. 


World's  Largest  Manufacturer  of  Wind  Electric  Equipment 


Like  every  other  successful  product,  Winchargers  are  imi- 
tated. But  there  is  only  one  Genuine  Wincharger.  It  alone  has 
the  famous  air-brake  governor,  developed  and  patented 
by  the  Albers  Brothers,  founders  of  the  Wincharger  Cor- 
poration. You  can  distinguish  the  genuine  Wincharger  by 
the  air-brake  governor  on  the  propeller.  It  is  the  one 
Wincharger  that  has  proved  its  dependability  all  over  the 
world.  Year  in  and  year  out,  genuine  Winchargers  furnish 
electricity  to  more  than  half  a  million  farm  folks  in  over 
100  different  countries. 

NEW  32-Volt 


1000  Watt 

A  more  powerful  Giant  32-volt  Win- 
charger for  heavier  light  and  power 
loads.  Operates  refrigerator,  water 
system,  larger  motors,  washer,  ironer, 
radio  and  other  power  appliances. 
Protected  territories  for  aggressive 
dealers.  For  full  information  write: 
Agency  Department,  Wincharger  Cor- 
poration, Sioux  City,  Iowa. 


'WORLD'S    LAR 


.1IIFACTURERS" 


▲ 


^ 


FARMERS    ARE  GETTING 
BIGGER  CHECKS- 


APRIL  MAY         JUNE 


The  New  Radios  — Complete  Specifications 

Dynamic  Testing.     Circuits  Interpreted  for  Servicemen 


VvATCH  these  new  General 
Electric  Radio  Features  set  the  pace  and  be- 
come the  year's  best  sellers.  From  every  stand- 
point the  new  G-E  line  is  sensational.  15  great 
new  models  covering  every  price  bracket.  And 
every  model  carries  a  discount  that  spells  big- 
profit  opportunity.  Backed  by  a  great  national 
advertising  and  promotion  campaign.  It  pays 
to  line  up  with  General  Electric  Radio. 


General   Electric 

Radio 
Presents  THREE 

Sensational 
SALES  MAKING 


GENERAL 


ELECTRIC 


G-E  AUTOMATIC 
PROGRAM  PRE-SELECTOR 


At  last  a  radio  that  tunes  itself  for  24- 
hours  ahead.  This  great  feature  is  miles 
ahead  of  remote  controls  of  every  type. 
Pick  out  the  programs  you  want  to  hear 
on  five  different  stations — and  the  G-E 
Automatic  Program  Pre-selector  brings 
them  in — without  your  doing  another 
blessed  thing.  No  re-tuning — No  re-dial- 
ing. From  now  on  its  Time  Tuning ! 


For  Longer  Life  and  Better  Performance 


From  every  angle  there  is  no  greater  assurance 
of  complete  satisfaction  on  any  radio  replace- 
ment part  than  the  Mallory  insignia.  Yet  they 
cost  no  more  than  ordinary  products. 
Mallory  Replacement  Vibrators  are  built  by 
the  most  highly  specialized  group  of  tech- 
nicians in  the  industry.  Mallory  not  only 
pioneered  vibrators  for  automobile  radios  but 


has  always  led  in  all  new  developments  in  the 
vibrator  industry. 

For  recommendations  by  receiver's  make  and 
model  number,  ask  your  distributor  for  folder 
E-551,  or  consult  the  Mallory-Yaxley  Radio 
Service  Encyclopedia  (Second  Edition).  Ask 
your  distributor  for  free  copies  of  RADIO  IN 
1938  CARS.  You'll  find  it  well  worth  reading. 


P.  R.  MALLORY  &  CO.,  Inc. 

INDIANAPOLIS,     INDIANA 

Cable  Address  —  PELMALLO 


RADIO  TODAY,  July,  1938,  Vol.  IV,  No.  7,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription  yearly 
$1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24,  1936, 
at  the  post  office  at  New  York,  N.Y.,  under  the  Act  of  March  3,  1879.    Printed  in  U.S.A.    Member  of  A.  B.  C.    Copyright  1938  by  Caldwell-Clements,  Inc. 


RCA  Research  is  the  Basis 
of  Radio  in  the  Home! 


r  j&i  %. 


Today's  magnificent  reception  has 

been  developed  by  years  of  patient 

work  in  RCA  Laboratories 

Most  of  us  can  recall  the  early  crystal  sets, 
when  the  marvel  of  hearing  music  by  wireless 
first  startled  the  world.  Poorquality  of  reception 
was  offset  by  the  wonder  of  the  achievement. 
A  year  before  these  crude  receivers  came 
into  public  use  RCA  had  already  established 
a  laboratory  for  developing  radio  reception  for 
the  home.  From  this  humble  beginning  great 
things  have  come.  Today,  hundreds  of  trained 
RCA  engineers  devote  their  time  to  this  work. 
Research  in  RCA  laboratories  has  produced, 
or  inspired,  virtually  all  important  advances 
in  the  quality  of  home  receiving  instruments. 

An  all-inclusive  business 

Similarly,  swift,  direct  radio  communication 
with  43  foreign  nations,  and  with  ships  at  sea, 
is  a  result  of  RCA  research.  Other  results  in- 
clude revolutionary  improvements  in  the  re- 
cording and  reproduction  of  sound  on  records 
and  motion  picture  films;  indispensable  new 
aids  to  police  and  aviation,  to  science  and  in- 
dustry. And,  thanks  to  years  of  unremitting 
study  by  RCA  engineers,  the  new  arts  of  tele- 
vision and  facsimile  now  give  promise  of  ren- 
dering important  public  services. 

The  Radio  Corporation  of  America  has  in- 
vested millions  of  dollars  in  research  to  make 
radio — and  the  by-products  of  radio — more 
efficient  and  more  economical,  and  to  give  to 
the  United  States,  in  every  phase  of  radio  de- 
velopment, undisputed  world  leadership. 

• 
Scene  in  RCA  laboratory  as  engineer  operates  control 
board  of  device  for  recording  tone  quality  of  radio  re- 
ceiving instruments.  This  is  but  one  of  the  many  in- 
tricate pieces  of  equipment  used  in  developing  the  fine 
quality  of  RCA  Victor  radios. 

Listen  to  the  Magic  Key  of  RCA,  presented  every  Sunday,  2  to  J  p.  m.,  E.  D.  S.  T.,  over  NBC  Blue  Network 

Radio  Corporation  of  America 

RADIO  CITY,  N.  Y. 

RCA  MANUFACTURING  CO.,  INC.  RCA  INSTITUTES,  INC.         RCA  COMMUNICATIONS,  INC. 

RADIOMARINE  CORPORATION  OF  AMERICA  NATIONAL  BROADCASTING  COMPANY 


Radio  Todav 


"WORLD 

July,   1938 


USIVE      RADIO      TUBE     MANUFACTURERS' 


Where  Skill  is  Vital 


ONE  of  the  most  delicate  proc- 
esses in  Sylvania  tube  manu- 
facture is  "mount  assembly" — a  job 
that  demands  exceptional  precision 
and  skill.  For  each  tube  part  must 
be  accurately  spaced  in  relation  to 
other  elements  .  .  .  and  carefully 
welded  in  place. 

The  slightest  variation  in  spacing 
might  affect  the  finished  tube's  per- 
formance. So  Sylvania  entrusts  this 


difficult  work  only  to  skilled  ex- 
perts— workers  like  the  girl  above, 
whose  dexterity  and  skill  are  the 


result  of  years  of  tube-building  ex- 
perience. 

Due  to  the  extreme  care  taken  at 
every  step  of  manufacture  .  .  .  and 
the  destruction  of  any  tube  found 
to  be  even  slightly  imperfect — you 
can't  buy  a  second-quality  Sylvania 
tube.  That's  why  every  Sylvania 
sale  means  a  satisfied  customer 
.  .  .  and  repeat  business.  Hygrade 
Sylvania  Corp.,  Emporium,  Pa. 
Cable  HYSYLVANIA,  N.  Y. 


SYLVANIA 


ALSO 
4 


Set-Tested   Radio  Tubes 
MAKERS        OF         HYGRADE 


LAMP 


BULBS 
Radio  Today 


Announcing.,  with  PRIDE  the  New  1939  Line 

of 


SELLING    LITTLE     RADIO7 

Starting  Off 
at  a  Price  of 

Foi  "Little  Miracle"  Superheterodyne 

(5  Tubes — 7-Tube  Performance) 


Model  AX-211  (Ivory  and  Walnut)  with  "MIRACLE  TOJfE  CHAMBER." 
5- Tube.  AC-DC  Superheterodyne.  (7-tube  performance.)  American  Broad- 
casts and  Police  Calls  .  .  .  Electro  Dynamic  Speaker  .  .  . 
Automatic  Volume  Control  .  .  .  Beam  Power  Tube  .  .  .  Built- 
in  Antenna  .  .  .    (In  Ivory,  $12.95).    In   Walnut 


^9.95 


ALL  NEW  FEATURES! 

Miracle  Tone  Chamber 
Miracle  Dial 

Miracle  Instamatic  Tuning 
New  STYLING 


Model  BM-216.  RADIO  AXD  PHONO- 
GRAPH with  "MIRACLE  TONE  CHAM- 
BER." 5  Tubes  (incl.  ballast  tube)  .  .  . 
AC  .  .  .  American  Broadcasts,  Police 
Calls  .  .  .  Electro  Dynamic  Speaker  .  .  . 
Automatic  Overload  Control  .  .  .  Beam 
Power  Tube  .  .  .  Built-in  Antenna  .  .  . 
PHONOGRAPH:  Synchronous  AC  Elec- 
tric Motor  .  .  .  Crystal  Pick-up  .  .  .  Tan- 
gential Tone  Arm.  Plays  10-in.  and 
12-in.  records.  Hand- 
rubbed  walnut  finish 
cabinet. 


$19.95 


Model    AX-222.    PORTABLE    COMBINA- 
TION  RADIO   PHONOGRAPH.    5   Tubes. 

AC-DC  Superheterodyne.  (7-tube  per- 
formance.) American  Broadcasts,  Police 
Calls  .  .  .  6-Inch  Permanent  Magnet 
Dynamic  Speaker  .  .  .  Automatic  Vol- 
ume Control  .  .  .  Gemloid  Dial  .  .  .  Built- 
in  Antenna.  PHONOGRAPH:  Self-Start- 
ing Motor  .  .  .  Crystal 
Pick-up  .  .  .  Plays  10- 
in.  and  12-in.  records. 


$59.95 


Model  BB  -  208.  With  "MIRACLE 
TONE  CHAMBER"  and  "MIRACLE 
INSTAMATIC  TUNING."  0  Tubes  (incl. 
ballast  tube).  AC-DC  American  Broad- 
casts, Police  Calls  .  .  .  Electro  Dy- 
namic Speaker  .  .  .  Automatic  Over- 
loadControl .  .  .  GemloidDial .  . .  Beam 
PowerTube.  .  .Built- 
in  Antenna.  Walnut 
Bakelite    Cabinet. 


$14.95 


69  Models,  $9.95  to  $219.95 

(Same  Price  Everywhere  in   U.  5.1 

Get  the  COMPLETE  1939  Emerson 
story  now — ALL,  of  the  facts — all  de- 
tails of  discounts,  advertising  and  dra- 
matic   promotion. 

Write  or  wire  your  Emerson  distributor 


Model  BR-226 — Symphony  Grand — with 
"MIRACLE  TONE  CHAMBER,"  "MIRA- 
CLE DIAL,"  "MIRACLE  INSTAMATIC 
TUNING."  13-Tube  High  Fidelity  AC 
Superheterodyne  .  .  .  American  and  For- 
eign, 16  to  555  Meters  .  .  .  10-in.  Dy- 
namic Speaker  ...  15  Watts  Output  .  .  . 
Automatic  Volume  Control  .  .  .  Continu- 
ous Tone  Control  .  .  .  Dynamic-Coupled 
Power  Output.  Band  Indicator  .  .  . 
Phonograph  Pick-up  Terminals.  Hand- 
rubbed  figured  butt  walnut  console  of 
Staybent  Construction. 


EMERSON  RADIO  AND  PHONOGRAPH  CORPORATION  •111  Eighth  Avenue  •  New  York,  N.  Y. 

"World's  Largest  Maker  of  Small  Radios" 


July,  1938 


CHECK 


luuu  will  really  be  a  "going-to-town"  year  with 
Westinghouse  Radios!  A  completely  new  line  of 
RADIO  VALUES  to  stimulate  buying  .  .  .  over  30 
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use.  It's  a  unique,  effective,  business-getting  program! 
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offers  .  .  .  feature  VALUES  to  induce  pros- 
pects to  YOUR  store.  Check  the  tone,  cabi- 
net construction  and  the  eye-appeal  of  this 
new  line  of  Westinghouse  radios,  styled  by 
America's  foremost  radio  designers. 

■the  many  outstanding  features  that  make 
Westinghouse  radios  more  easily  demon- 
strated, more  easily  sold. 

■the  sales  helps  Westinghouse  has  made 
available — a  proved  sales  getting  program 
.  .  .  powerful  cooperative  newspaper  adver- 
tising .  .  .  consumer  literature  .  .  .  floor 
displays  .  .  .  window  displays  .  .  .  and  all  the 
other  items  .  .  .  AND  THE  ANSWER  IS 


THE   INSIGNIA   OF 

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FOR  YOU   IN 

1939! 


MERCHANDISE  HEADQUARTERS 

WESTINGHOUSE  RADIO 
150  Varick  Street        New  York  City 


Westtnghous^fe^ 


RADIO 


Radio  Today 


'UMMER  shows  up  the  tubes  that  managed  to  "get  by" 

luring  the  "Winter  and  Spring.   When  warm  weather  sets 

in  .  .  .  and  the  crackle  of  Summer  static  begifts  to  make 

reception  difficult   .  .  .  radio  owhers  get  suspicious  of  the 

lubes  in  their  sets. 

/And  in  a  large  proportion  of  those  cases,  their  suspicions 
are  justified.  The  tubes  which  labored  so  hard  and  so  faith- 
fully over  so  many  hours  a  day  and  night  through  the  Win- 
ter do  need  replacing  .  .  .  and  naturally,  Philco  owners  want 
genuine  Philco  Tubes.  That  natural  preference  gives  the 
dealer  who  stocks  and  sells  Philco  Tubes  the  inside  track 
to  the  largest  share  of  the  replacement  market.  But  remem- 
ber .  .  .  because  of  Philco's  predominant  position  in  the 
radio  field  .  .  .  because  more  people  know  and  respect  Philco 
as  the  greatest  name  in  radio  .  .  .  Philco  Tubes  have  100% 
sales  appeal  to  those  who  own  other  makes  of  radios. 

Summer  weather  makes  tube  sales  blossom  .  .  .  and  the 
biggest  share  of  the  harvest  falls  to  the  dealer  who  sells 
Philco  Tubes  and  lets  the  world  know  that  he  sells  them! 


7Ji&  <£u&dt7uljed  utf&e  lOot/c/ fa Se//, 


HARRY  BOYD  BROWN 

National  Merchandising 

Manager  of  Pbilco 


MYSTERY  CONTROL  WILL  DELIVER 

THE  RADIO  PROSPECTS  OF  AMERICA 

TO  THE  PHILCO  DEALERS 


TV  ^"ORE  than  6  million  people  will  buy  home  radios  during 


the  next  1 2  months — and  more  than  4  million  people  will 
buy  home  radios  before  January.  This  is  the  inevitable  home 
radio  market  for  this  coming  season. 

And  the  vast  majority  of  these  millions  of  radio  buyers — in  fact,  everybody 
who  is  even  thinking  of  buying  a  radio — will  certainly  want  a  demonstration  of 
Mystery  Control.  Wouldn't  you? 

This  means  that  the  fascination,  the  magic,  the  wonderful  convenience  of 
Mystery  Control  will  deliver  the  radio  prospects  of  America  to  the  Philco  dealers. 
And  you  and  all  the  other  radio  merchants  will  be  surprised  at  the  vast  number 
of  people  who  will  gladly  pay  the  higher  price  for  those  great  Philco  models. 

But  in  any  event — after  a  demonstration  of  Mystery  Control — no  matter  what 
price  radio  the  prospect  may  decide  to  buy — no  matter  what  size — what  type  or 
what  model — it  then  certainly  should  be  a  Philco.  The  public  will  naturally  de- 
mand a  product — a  radio  model  made  by  Philco — the  recognized  leader  in  the 
radio  industry — the  creators  of  Mystery  Control. 

And  what  a  marvelous  line  of  Philco  radios  in  every  price  bracket!  Perfected 
instant  Push-Button  Tuning  models — Furniture  models — Table  models — Com- 
pacts— superb  Radio  Phonograph  models.  And  Farm  radios  almost  as  revolu- 
tionary and  amazing  as  Mystery  Control  itself.  Unparalleled  radio  values  for 
every  market — priced  to  meet  conditions — bound  to  sell  in  volume. 

Yes,  and  due  to  Mystery  Control — Radio  has  again  become  a  Major  Appliance 
business.  Higher  priced — more  profitable  units  will  now  be  sold — thanks  to  the 
genius  and  resourcefulness  of  Philco  engineers. 

Thousands  of  radio  dealers — year  after  year — have  sold  Philco  exclusively. 
They  have  done  so  because  the  tremendous  public  demand  for  Philco  made  it 
possible — practical — profitable.  And  every  retail  merchant  knows  that  the  secret 
of  radio  profits  lies  in  fast  turn-over  on  the  least  possible  inventory  and  investment. 

And  now — above  all  times — the  wise  radio  dealer  can  concentrate  his  invest- 
ment and  his  selling  effort  on  ONE  single  line — on  Philco.  The  overwhelming 
public  demand  for  Philco  plus  Mystery  Control — plus  amazing  price  values 
throughout  the  entire  Philco  line  for  1939 — has  created  for  the  radio  dealer  the 
perfect  business  situation — small  investment  and  fast  turn-over.  And  it  is  exactly 
that  combination — small  investment  and  fast  turn-over — that  brings  real  net  profit 
in  the  retail  radio  business. 


PHILC 


^rB-^j^*3*^^ 


8 


Radio  Today 


JUL  26  1938 


©GIB    3*4478 


Staff— 

Darrell  Bartee 
G.  H.  Mavorga 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton  K.  Ulrich 


M.  E.  Herring 
Sales  Manager 

201  N.  Wells.  Chicago,  111. 


Orestes  H.  Cai 
Editor 


M.    Clements 
Publisher 


Copyright    1938 

Caldwell-Clements,  Inc. 

480   Lexington   Ave. 

New  York,  N.  Y. 

Tel.    Plaza    3-1340 

Vol.  IV,  No.  7 


Member  Audit   Bureau  of  Circulations 


BUSINESS  BEGINS 
TO  BE  BRISK 

Several  branches  of  trade  have 
taken  a  nice  twist  upward,  as  if  the 
recession  forces  had  lost  out. 

ECA  reports  an  employment  in- 
crease of  1,200. 

For  CBS,  the  first  six  months  added 
up  to  the  best  half-year  for  any  net- 
work in  the  history  of  radio,  5.3  per 
cent  ahead  of  the  Columbia  figure  for 
that  period  last  year. 

Last  month  at  NBC,  billings  were 
6.6  per  cent  over  the  figures  for  June 
last  year,  and  the  six-month  total  was 
up  5.4  per  cent. 

Crosley  Badio  Corp.  reports  an  ex- 
cellent demand  for  new  products  in 
over  "14  key  cities. 

Bhilco  declares  that  "signs  of  a  de- 
cided economic  upward  movement  are 
evident  even  in  communities  which 
had  been  hit  hardest  by  the  business 
slump." 

Mutual  Broadcasting  System  points 
to  an  72.4  per  cent  increase  for  June 
1938,  over  last  year;  the  six-month 
total  increase  for  this  year  was  15.1 
per  cent. 

FACSIMILE  AND  BROADCASTING 
ON  SAME  CHANNEL 

To  test  the  efficacy  of  duplex  trans- 
mission and  reception  of  regular 
broadcast  and  facsimile  programs  on 
a  single  channel,  W.  G.  H.  Finch, 
facsimile  inventor  and  president  of 
Finch  Telecommunications  Labora- 
tories, Inc.,  New  York  City,  an- 
nounces completion  of  its  1  kw.  du- 
plex transmitter,  first  to  be  licensed 
by  FCC  for  dual  transmission  of  two 
such  services. 

Such  dual  transmission,  says  Finch, 
will  mean  economy  in  the  use  of  one 
channel  instead  of  two  for  the  sepa- 
rate services;  use  of  a  single  receiver 
for  both  types  of  reception,  and  econ- 
omies for  the  broadcaster  in  the  use 
of  a  single  transmitter  in  providing 
the  two  services. 

The  experiment  also  suggests   pos- 


sibilities of  putting  facsimile  picture 
transmissions  on  broadcast  channels 
simultaneously  with  the  regular  pro- 
grams, thus  opening  up  these  chan- 
nels and  millions  of  receivers  for  day- 
time reception  of  facsimile,  without 
waiting  for  the  early  A.M.  hours 
now  authorized  for  facsimile. 

RURAL  REGIONS  LEAD  IN 
RADIO  OPPORTUNITIES 

It  is  the  small  towns  and  rural 
areas  which  offer  the  best  opportuni- 
ties for  radio-set  sales,  according  to 
further  analysis  of  the  findings  of 
the  Joint  Committee  on  Radio  Re- 
search, taken  by  size  of  community. 
This  latest  study,  made  by  the  House- 
hold Magazine,  reveals  that  those 
counties  whose  largest  city  has  a  pop-: 
illation  of  500,000  or  over,  average 
lyi  per  cent  of  homes  without  radios 
(see  chart),  while  counties  containing 
no  community  over  2,500  averaged  3G 
per  cent  without  radios. 

The   chart   on   this   page   shows   the 


number  of  total  homes  and  of  radio 
homes  in  each  bracket,  and  also  re- 
veals how  counties  having  chief  pop- 
ulation centers  as  below,  rank  in 
radio  sales  opportunities : 

Homes 


ith  out  radio 

7/2% 

9  % 

14  % 

20  % 

30  % 

36  % 


Population  t 

500,000  and  over 

100,000  to  500,000.  .. 

25,000  to  100,000... 

10,000  to    25,000... 

2,500   to    10,000... 

under  2,500.  .. 

Grouped  by  geographical  divisions, 
the  saturation  percentages  of  the  dif- 
ferent sections  were  shown  to  be : 

New  England 92.5% 

Middle  Atlantic 91.3% 

South  Atlantic 67.7% 

East  North  Central..  ..87.3% 
East  South  Central..  .61.9% 
West  North  Central. .  .78.9% 
West  South  Central. .  .65.1% 

Mountain    77.9% 

Facific    97.6% 


IT.  S.  Total 81.7% 


BIGGEST  OPENING  TO  SELL  RADIOS  IS  IN  RURAL  AREAS 


500.000  100,000 

a  OVER  500,000 


25,000  10.000 

100,000  25,000 


2  500  UNDER 

10,000  2500 


July,   1938 


"MAKE-TEN-CALLS 
-PER-DAY"  CAMPAIGN 

The  last  few  weeks  have  witnessed 
the  rapid  spread  of  the  "Sales  Mean 
Jobs"  movement,  initiated  by  Kelvi- 
nator's  George  W.  Mason,  first  tried 
out  at  Lincoln,  Neb.,  and  now  being 
taken  up  by  sales  groups  all  over  the 
nation. 

Boiled  down,  this  movement  is 
based  upon  a  conviction  and  a  par- 
tially-proved conclusion  that  most 
present  sales  resistance  is  due  to  fear 
and  to  lack  of  confidence,  and  that  the 
pushing  of  sales  of  all  kinds  will  mean 
the  creation  of  additional  jobs  all 
along  the  line — sales  mean  jobs.  In 
other  words,  it  is  figured  that  a  real 
selling  effort  will  start  the  ball  rolling 
toward  better  times  and  that  there 
still  are  enough  people  able  and  will- 
ing to  buy,  if  reached  in  their  homes, 
and  that  "ten  calls  per  day  by  each 
salesman"  will  do  the  trick. 

Known  also  as  the  National  Sales- 
men's Crusade,  the  movement  is  being 
carried  on  at  Rochester,  N.  Y.,  by  the 
Chamber  of  Commerce,  with  Frank 
Beaucaire,  radio  distributor,  as  prime 
mover.  This  drive  will  culminate  in 
August  with  a  municipal  sales  parade. 
A  mass  meeting  in  the  Rochester  Sta- 
dium will  enlist  everyone  engaged  in 
all  types  of  selling. 

The  purpose  of  the  campaign,  ac- 
cording to  Beaucaire,  is  to  stimulate 
and  invigorate  those  who  do  the  sell- 
ing in  every  line  of  business  and  to 
demonstrate  to  the  public,  as  well,  the 
importance  of  sales  for  economic  well- 
being. 

At  Milwaukee,  the  Wisconsin 
Radio.  Refrigeration  and  Appliance 
Association  has  pledged  its  local  co- 


D.    N.    Dulweber,    president    Supreme 

Instruments   Corporation,  looks  ahead 

to    bigger   things    for    servicemen. 

operation,  under  the  leadership  of 
Frank  Greusel,  president.  Many  radio 
men  felt  that  the  radio  and  electrical 
group  should  take  leadership  without 
waiting  for  the  city-wide  campaign. 
Radio  men  recommended  that  their 
own  members  immediately  begin  set- 
ting a  quota  of  "ten  calls  per  day"  for 
each  of  their  own  salesmen. 

NEW  RMA  DIRECTORS 

Albert  S.  Wells,  president  of  Wells 
Gardner  &  Company,  Chicago,  was 
elected  president  of  the  Radio  Manu- 
facturers Association  at  its  fourteenth 
annual  convention  in  Chicago,  June  7 
and  8. 

The  new  president  has  been  identi- 


National   Farm   and   Home   Hour  celebrates  3,000th  broadcast.     L.   R.   Lohr,   presi- 
dent  NBC,  felicitates  Frank  E.  Mullen,  now  RCA  executive,  who  founded  the 
Farm  Hour  ten  years  ago. 

10 


fied  with  radio  since  1924.  He  suc- 
ceeds Leslie  F.  Muter  of  Chicago,  who 
served  four  terms  as  president  and  has 
now  been  elected  its  treasurer.  Bond 
Geddes  of  Washington  was  reelected 
executive  vice-president,  and  John  W. 
Van  Allen  of  Buffalo  reappointed  gen- 
eral counsel.  Newly  elected  directors 
are ".  Harry  G.  Sparks  of  Jackson, 
Mich. ;  Glenn  W.  Thompson  of  Co- 
lumbus, Ind. ;  Octave  Blake  of  New 
York  City;  James  C.  Daley  of  Bell- 
wood,  111.,  and  J.  McWilliams  Stone 
of  St.  Charles,  111. 

MILWAUKEE  SALESMEN'S  UNION 
POLICES  RADIO  SELLING 

Wide  attention  was  attracted  re- 
cently by  the  news  that  a  radio  and 
appliance  salesmen's  union  in  Mil- 
waukee has  acquired  union  recogni- 
tion by  undertaking  the  policing  of 
retail  radio  prices  and  policies  of 
local  dealers. 

Latest  developments  were  disclosed 
at  a  conference  between  representa- 
tives of  the  retail  salesmen's  union  and 
Milwaukee  distributors  of  electrical 
appliances,  June  24.  Among  other 
things,  representatives  of  the  union, 
Messrs.  Koerner  and  Burbach,  an- 
nounced that  they  were  going  forward 
immediately  with  their  plan  of  elim- 
inating unsound  retail  outlets.  Their 
announcement  to  this  effect  was  fol- 
lowed two  days  later  by  a  letter  from 
the  union  to  various  distributors  list- 
ing as  unfair  three  retail  outlets  upon 
which  the  union  ban  has  fallen. 

Trade-in  violations 

It  was  also  disclosed  that  the  union 
is  making  a  thorough  survey  of  the 
retail  situation,  covered  not  only  by 
shopping  of  retail  stores  in  search  of 
violations  of  the  trade-in  allowance 
schedule,  but  that  they  are  also  mak- 
ing a  cheek  of  credit  standings,  and 
compilations  of  the  number  of  sales- 
men employed  and  purchases  made  by 
various  retail  outlets  this  season. 

While  the  aim  and  purpose  back  of 
this  effort  is  to  try  to  bring  about  the 
distribution  of  radio  and  electrical  ap- 
pliances through  retail  outlets  where 
salesmen  are  employed,  the  union  rep- 
resentatives indicated  that  there 
would  be  no  attempt  to  ban  retail 
outlets  merely  because  salesmen  are 
not  employed,  but  that  the  placing  of 
a  retail  store  on  the  union's  "unfair 
list"  would  be  governed  by  the  store's 
conduct  regarding  the  trade  rules 
sponsored  by  the  union,  and  by  its 
credit  standing.  The  union  represent- 
atives admitted  realization  of  the  fact 
that  the  good,  sound,  one-man  retail 
store  of  today  may  be  the  big  store  of 
next  week  which  will  employ  salesmen 
who  are  union  members. 


Radio  Today 


HUGE  SURVEY  HINTS  AT 
PROFUSION  OF  OLD  SETS 

Housewives  totalling  53,124  have 
been  asked  by  Scripps-Howard  news- 
papers to  list  their  immediate  posses- 
sions. This  nation-wide  home  inven- 
tory reached  into  16  cities  served  by 
Scripps-Howard  papers,  and  is  the 
largest  market  analysis  ever  to  be 
made  by  anybody  short  of  the  govern- 
ment. 

Here's  how  radio-ownership  came 
out,  in  the  composite  16-city  picture. 
By  brands,  the  figures  here  are  per 
cent  of  the  mentions. 

Phileo    22.4 

RCA 10.8 

Majestic    8.1 

At  water  Kent 4.8 

Zenith    4.5 

Crosley 4.3 

Silvertone    3.8 

G-E    3.7 

Sparton    2.0 

Bosch  1.7 

Grunow    1.6 

Stewart    Warner 1.5 

Emerson    1.5 

True-Tone 1-2 

All  others  27.9 

Striking  evidence  of  the  huge  op- 
portunity for  replacements  is  offered 
by  fact  that  prominent  positions  are 
still  held  by  lines  long  out  of  produc- 
tion. 

Of  the  53,124  homes  inventoried, 
48,535  (91.4  per  cent)  had  household 
radios.  The  individual  city  percent- 
ages ranged  from  a  low  of  86.1  per 
cent  of  the  homes  in  Columbus,  to  a 
high  of  95.9  per  cent  of  the  homes  in 
Pittsburgh. 


Ben  Abrams.  Emerson  president,  awards  five  distributors'  prizes  for  outstanding 
sales  records,  during  Emerson  convention,   New  York.  June   20-21.     From  left: 
Henry  Lapkin,  San  Francisco;  Manny  Beckwith,  Boston:  W.  T.  Walker,  Phila- 
delphia: S.  Schulman,  Chicago:  M.  J.  Linehan,  Dallas,  Tex.,  and  Mr.  Abrams. 


McWilliams  Stone,  Operadio  presi- 
dent, is  new  director  RMA. 


In  the  individual  16  city  charts, 
Phileo  shows  up  uniformly  in  first 
place,  but  with  an  acceptance  varying 
from  28.5  per  cent  in  Houston  to 
17.6  per  cent  in  Toledo.  Howe.ver,  the 
acceptance  of  the  other  charted  brands 
is  not  uniform.  B.C.A-Victor  yields 
second  place  to  Majestic  in  three 
cities  (Akron,  Evansville  and  Fort 
Worth)  and  in  the  city  of  Fort  Worth, 
BCA- Victor  runs  a  poor  fourth  after 
Crosley.  Crosley  also  shows  up  well 
in  Columbus,  Cincinnati,  Indianapo- 
lis and  Birmingham. 

Atwater  Kent  is  strong  in  Knox- 
ville,  Birmingham  and  Houston, 
where  it  receives  11.0  per  cent,  7.0 
per  cent  and  7.5  per  cent  of  the  men- 
tions respectively. 

Silvertone  is  strong  in  Evansville, 
where  it  appears  in  second  place, 
with  8.1  per  cent  of  the  mentions.  In 
the  16-city  picture,  Silvertone  appears 
in  seventh  place,  with  3.8  per  cent  of 
the  mentions. 


17,000  FACTS  ABOUT  THE 
NEW  1938-39  SETS 

*  Featured  exclusively  in  this 
issue  of  Radio  Today  are  the  specifi- 
cations for  approximately  700  of  the 
leading'  1938-39  receiver  models. 
These  listings  give  a  grand  total  of 
17,000  facts  about  the  new  sets — both 
battery  and  regular  power-line  operat- 
ed sets. 

Included  this  year  for  the  first  time 
is  information  on  the  new  push-but- 
ton tuning  systems.  Ever  alert  to 
changes  in  the  new  lines,  Radio  To- 
day's specifications  are  annually  re- 
vised in  a  form  to  accommodate  the 
new   features.      Besides   telling  what 


type  of  push-button  tuning  is  em- 
ployed, number  of,  stations,  and 
number  of  adjustments  to  set  up  each 
button,  the  specifications  list  twenty 
other  important  sales  and  technical 
features  of  the  new  lines. 

Also  to  afford  a  more  complete  de- 
scription of  the  battery  sets,  special 
headings  have  been  included  that  tell 
about  battery  consumption  and  other 
features  of  importance  to  dealers  sell- 
ing battery-type  sets.  In  other 
words,  a  special  set  of  specifications 
is  used  for  the  battery  sets. 

Only  Radio  Today's  specifications 
contain  some  two  dozen  facts  for  each 
radio  model;  17,000  facts  crammed 
into  eight  pages  for  convenient  ref- 
erence. 


T.   A.   Kennally.   Phileo  vice-president 

and    sales   head,    sees   marked   upturn 

ahead  for  radio  industry. 


July,   1938 


11 


RFD  OF  RADIO  SALES 

Mr.  Farmer  is  now  our  best  prospect  for  modern  radio 


Sample  flashes 

Washington,  D.  C. — A  rnore-than- 
seasonal  increase  was  noted  in  daily 
average  sales  of  general  merchandise 
in  small  towns  and  rural  areas,  in  the 
latest  figures  compiled — Dept.  of  Com- 
merce. 

Omaha,  Neb. — We  have  the  best 
outlook  on  crop  conditions  of  any 
time  during  the  past  10  years.  If  we 
get  any  kind  of  a  break  during  the 
summer  months,  this  section  certainly 
ought  to  go  a  long  way  toward  helping 
the  country  out  of  the  present  reces- 
sion— Don  W.  Clark,  radio  distribu- 
tor. 

In  other  words,  a  bumper  crop  of 
sales  for  the  farm  radio  dealer !  Ac- 
cording to  typical  reports  on  rural 
prospects. 

The  34,000,000  persons  living  on 
farms  today  have  become  special  to  the 
radio  business.  For  instance,  a  hard- 
boiled  dealer  in  Kansas  reports :  "For 
one  thing  they  are  not  sold  to  the  gills, 
like  other  classes.  And  this  year  they 
have  good  crops.  There's  some  sweet 
stuff  in  the  way  of  merchandise  on  the 
market  this  time.  Looks  like  a  swell 
proposition." 

What  are  dealers  saying  to  farmers  ? 
After  having  noticed  that  over  half  of 
the  rural  folk  do  not  have  radios  at 
all,  that  many  farm  sets  need  to  be  re- 
placed, and  that  this  is  a  top  season 
in  model  appeal,  what  then? 


The  development  of  low-drain  tubes 
is  an  example  of  extra  appeal  for  this 
year.  This  trend  means  economical 
operation  for  the  farmer,  and  it  should 
be  remembered  that  the  fellow  is 
much  more  interested  in  price  than 
he  used  to  be.  Even  with  fat  checks 
coming  in  this  month,  the  farmer  and 
his  wife  are  more  the  shopper  type 
than  formerly,  and  are  very  careful 
about  costs  and  upkeep.  The  new 
tubes  will  interest  them,  genuinely. 

Utility  cabinets,  improvements  in 
battery  design   and  convenience,   bet- 


FARM  FACTS 

Total  U.S.  farms 6,800,000 

Farm  population 34,000,000 

Non-radio  farms 3,800,000 

Wired  farms 1,250,000 

REA  projects  in  operation 250 

REA  proj.  under  construction. ...  1 30 

REA-served  families 250,000 

Peak  income  months 

North  Atlantic June 

South  Atlantic October 

East  North  Central July 

West  North  Central July 

Western October 

South  Central October 

Total  farm  income,  1937 

$8,500,000,000. 


ter  motors,  and  more  attractive  tuning 
have  been  added  to  the  farm  radio 
set-up. 

A  good  many  of  the  farm  prospects 
who  were  stalling  around  waiting  for 
rural  electrification  may  now  be  sold 
on  the  fact  that  manufacturers  offer  a 
wide  variety  of  receivers  which  will 
work  either  way,  at  the  touch  of  a 
switch.  This  is  not  a  1939  develop- 
ment, but  by  this  time  many  farmers 
can  take  their  neighbors'  word  for  the 
value  of  the  device. 

RFD  situation 

Last  winter,  dealers  found  that  it 
was  necessary  to  go  out  and  sell 
radios,  rather  than  parking  hopefully 
in  the  store.  Many  merchants  have 
carried  this  habit  promptly  into  the 
farm  market  and  have  made  plans  to 
call  at  farm  homes.  Evening  demon- 
strations are  favored. 

This  season  there  is  a  definite  move- 
ment back  to  the  land,  according  to  a 
1938  survey  made  by  the  Agriculture 
Division,  Bureau  of  the  Census,  Dept. 
of  Commerce.  Radio  salesmen  are 
watching  local  papers  for  addresses  of 
newcomers. 

Farm  youngsters  have  become  an 
important  element  in  radio  promotion. 
This  is  due  mainly  to  the  increasing 
use  of  radio  in  rural  schools,  and  to 
the  now-popular  practice  of  featuring 
the  affairs  of  farm  youth  organiza- 
tions on  the  air. 


12 


Radio  Today 


The  use  of  receivers  on  tractors  and 
in  dairy  barns  has  developed  to  im- 
portant proportions,  and  the  idea  of 
extra  sets  in  farm  houses  has  gathered 
strength. 

Farmer  J.  W.  Gorman  of  Grant 
Park,  111.,  recently  went  on  an  NBC 
network  from  his  seat  on  his  radio- 
equipped  tractor,  a  stunt  which  is  cer- 
tain to  have  its  national  effect  on  the 
future  of  radio  listening  in  the  fields. 

Broadcast  interest 

Encouraged  by  rural  interest  and 
prosperity,  the  networks  have  ad- 
vanced their  program  efforts  and  have 
enriched  the  air  menu  for  farms.  CBS 
launches  this  month  three  new  nation- 
wide programs,  carefully  suited  to  the 
"dirt"  appetites.  "The  Farmer  Takes 
the  Mike"  is  a  practical  discussion 
period  of  farm  problems.  "BFD  No. 
1"  will  be  concerned  with  homemaking 
and  will  attract  farm  women  by  the 
million.  The  third  feature  is  titled 
"Four-Corners  Theater,"  a  weekly  se- 
quence of  rural  dramas.  Farm  homes 
will  require  more  and  better  sets  to 
get  in  on  this  important  series. 

Last  month  NBC  created  an  agri- 
cultural stir  with  a  special  3,00Oth 
anniversary  broadcast  of  the  Farm 
and  Home  Hour.  The  show  is  10 
years  old  and  is  currently  carried  on 
90  stations,  each  week  day,  coast-to- 
coast.  These  facts  are  a  snappy  part 
of  a  radio  dealer's  sales  presentation. 

Other  data  for  receiver  promoters  to 
use  comes  from  the  Cooperative 
Analysis  of  Broadcasting,  a  research 
organization  which  recently  made  21,- 
154  interviews  among  set  owners  on 
farms  and  in  small  towns.  The  report 
indicates  "that  during  the  course  on 
an  average  week  day,  listening  in 
rural  areas  is  generally  higher  than  in 
large  cities  until  the  early  evening. 
After  8  p.m.  urban  listening  is  greater 
for  the  balance  of  the  evening,  reach- 
ing a  peak  at  9 :30,  whereas  rural 
listening  reached  its  peak  between  7 
and  7.30  p.m." 

Bural  interest  in  news  broadcasts 
has  picked  up  sharply  because  in  the 
wide  open  spaces,  people  are  now  in- 
tensely interested  in  recession-time 
fluctuations  in  farm  product  prices. 
Local  lists  of  these  airings,  usually 
combined  with  radio  weather  report 
schedules,  are  freshly  popular  in 
dealer  promotions. 

Other  devices  being  used  by  dealers 
this  summer  indicate  that  the  field  is 
a  good  one  for  resourceful  salesmen. 


Serenaded  wth  radio  music,  cows  con- 
sider giving  more  milk.  Seriously,  the 
dairy  barn  receiver  is  another  good  bet 
for  modern  farm  radio  dealers.  Photo 
shows  Philco,  courtesy  REA.  Photo 
opposite  by  Don  Finlayson,  KOIL, 
Omaha,    Neb. 


Some  radio  men  take  it  on  them- 
selves to  see  that  their  radio  prospects 
take  part  in  farm  broadcasts,  where 
audience  participation  is  invited.  Due 
to  a  trend  to  this  type  of  program, 
these  chances  are  increasing.  Where 
a  dealer  is  involved,  he  establishes  a 
permanent  friendship  for  himself  and 
his  store. 

Action  displays  are  being  used  in 
windows  in  country  towns  where  traf- 
fic was  formerly  considered  too  light 
to  justify  them.  These  include  bat- 
tery operation  demonstrations,  whirl- 
ing wind  chargers,  etc. 

Actual  farm  products,  such  as  sea- 
sonal grains,  sheaves  of  wheat,  ears 
of  corn,  etc.,  are  being  used  in  win- 
dows, neatly  distributed  among  radio 
models. 

Important  in  many  farm  sections  is 
the  matter  of  time  payments.  Follow- 
ing the  harvest  of  the  prospect's  main 
crop,  alert  radio  shops  see  to  it  that 
some  sort  of  an  account  is  opened, 
whether  on  radio  merchandise  or  on 
related  items. 

RADIO  STORE  HEADQUARTERS 
FOR  FARMERS 

*  It  pays  to  be  friendly  with 
farmers,  says  O.  H.  Shepherd,  radio 
and  electrical  dealer  at  Jefferson,  Wis. 

Mr.  Shepherd  has  been  in  business 
for  twenty-one  years  in  Jefferson,  and 
he  always  invites  farmers  to  drop  in 
and  see  him  when  in  town.  He  says 
they  are  welcome  to  leave  their  pack- 
ages at  his  store  while  they  continue 
shopping,  or  to  leave  messages  for 
friends  who  may  drop  in. 

This  kind  of  service  is  appreciated. 
For  example,  many  farmers  drop  in 
at  Shepherd's  place  Friday  and  Sat- 
urday  nights,   sit   in   a   chair,   smoke 


and  talk  with  him.  Some  will  say, 
"The  wife  and  kids  are  shopping  for 
dry  goods.  I'll  wait  here  till  they  get 
through.  I'm  no  hand  at  looking  at 
yard  goods  anyway." 

This  same  farmer  may  see  the 
many  radios  in  stock.  In  fact,  he 
can't  help  hearing  one  of  the  new 
models  playing  softly,  sweetly,  with 
a  fine  tone.  In  many  eases,  by  the 
time  the  wife  and  children  get 
through  shopping  and  come  for 
Daddy,  he  has  bought  a  new  radio 
from  Mr.  Shepherd,  so  entranced  has 
he  become  with  the  new  models. 

Can't  high   pressure 

"You  can't  high-pressure  a  farmer 
into  buying,"  says  Mr.  Shepherd. 
"But  you  can  show  a  sincere  desire 
to  help  him,  to  service  him,  to  be  nice 
to  him,  and  then  they'll  go  out  of 
their  way  to  buy  from  you." 

Mr.  Shepherd  makes  periodic  trips 
through  rural  territory  chatting  with 
farmers,  offering  to  repair  their 
radios  and  consequently  invites  them 
to  use  his  store  for  "waiting  head- 
quarters" when  in  town.  As  a  result, 
he  knows  what  each  farmer  is  inter- 
ested in,  the  size  of  his  farm,  how 
many  cows,  chickens,  pigs,  etc.,  he 
has,  and  what  his  pet  interests  are. 
This  helps  a  great  deal  in  selling,  he 
states,  as  farmers  like  to  know  that 
business  people  take  enough  interest 
in  them  to  find  out  how  farmers  earn 
a  living  and  what  problems  they  ex- 
perience. 

Mr.  Shepherd  has  his  store  so  ar- 
ranged that  radios  on  display  make  a 
very  striking  impression.  Receivers 
are  placed  in  specially  built  alcove 
platforms.  He  spotlights  attention  on 
them  at  night,  too,  which  makes  them 
attract  everyone  who  enters  the  store. 


DEALERS  PLAN  PROMOTIONS  PLUS 


Mid- 


iles  d 


summer  sales  devices  in  radio  s 


hops 


RURAL  DAY  NETS  PROSPECTS 

Landaal  Bros.,  Waupun,  Wis.,  stage 
a  Rural  Day  free  for  farmers  once  a 
year  which  attracts  more  than  1,000 
farmers. 

This  big  crowd  of  farmers  is  taken 
to  the  local  Municipal  Building  where 
they  are  shown  various  movies,  and 
given  talks  during  the  morning.  Then 
back  to  the  big  Landaal  store  at  noon 
where  a  lunch  is  served.  After  lunch 
the  farmers  browse  about  the  big  Lan- 
daal store  witnessing  demonstrations 
on  radios,  washing  machines,  and 
other  electrical  appliances,  asking 
many  questions.  The  Landaal  firm 
secured  many  radio  prospects  from  its 
last  Rural  Day  as  well  as  selling  a 
number  of  radios  right  off  the  floor. 

At  such  an  affair,  states  George 
Landaal,  a  farmer  feels  more  like  buy- 
ing than  if  a  salesman  accosts  him  out 
in  the  field  when  he  is  working.  The 
farmer  sees  his  neighbors  buying ;  free 
from  farm  work  for  the  time  being, 
the  farmer  has  time  to  ask  questions 
concerning  radios  and  appliances, 
have  them  demonstrated  for  him,  and 
this  usually  helps  make  sales. 

Also,  the  prospect  list  secured 
through  Rural  Day  is  one  that  can  be 
worked  for  many  months  afterward, 
the  Landaal  firm  finds. 


In  radios  this  firm  always  man- 
ages to  have  a  high  class,  modern  con- 
sole radio  playing  during  the  hour 
when  the  1,000  farmers  eat  at  the 
store.  Thus  they  can't  help  hearing 
the  quality  tone  of  the  radio  and  they 
silently  compare  this  new  machine 
with  their  old  machines  at  home. 
Such  a  comparison  inclines  many  a 
farmer  to  listen  more  eagerly  when  a 
Landaal  salesman  later  calls  on  him 
at  his  home  to  try  to  sell  him  a  new 
radio. 

This  company  has  two  men  who 
cover  the  rural  territory  regularly 
selling  radios,  appliances,  hardware 
and  implements.  These  salesmen  find 
that  Rural  Day  each  year  builds  good 
will  for  the  Landaal  firm  and  helps 
make  the  sales  approach  much  easier. 

PROFITS  FROM  EXTRA  SETS 

Sales  possibilities  among  prospects 
for  "second"  sets  are  unlimited,  ac- 
cording to  H.  T.  Byrnes,  of  Majestic 
Radio  &  Television  Corp.  Describing 
the  market  for  this  company's  '"Petit" 
sets,  Mr.  Byrnes  makes  eight  peppy 
suggestions : 

Kitchen — Here  the  radio  lightens 
the  burden  of  the  housewife  with  mu- 
sic, stories,  recipes.  Suggest  it  to 
friend  husband. 


RADIOS  MAKE  DEBUT  IN  AUTHENTIC  PERIOD  CABINETS 

!  IE 


Authentic  period  designs  in  radio— now  offered  to  dealers  by  the  new  Brunswick 

radio   division   of   Mersman    Bros.   Furniture.      Sample    at   left,    a    Queen    Anne 

combination,  mostly  mahogany,  8-tube  radio,  $149.50.     Right,  a  French  style  in 

walnut   and   India   rosewood,   with  6-tube   radio,  $89.50. 


Bedroom — Color  combinations  will 
harmonize  with  any  bedroom  decora- 
tive scheme — brings  harmony  to 
breakfasters,  and  readers-in-bed.  Ideal 
for  students. 

Playroom — No  more  family  squab- 
bles. A  radio  here  thrills  the  kids 
with  Dick  Tracy  and  the  Lone  Ranger 
while  Dad  enjoys  the  newscasts  on  the 
console. 

Summer  Cottage — It's  impractical 
to  lug  the  big  console  around,  but  this 
radio  goes  to  the  country  for  the  week- 
end or  the  summer  .  .  .  brings  the 
world  to  the  vacationer. 

Office — Market  reports  ?  Ball  games  ? 
A  bit  of  relaxing  music?  This  radio 
gets  it  all  but  doesn't  upset  the  dig- 
nity of  the  finest  office. 

Shop — Music  put  workers  in  a  bet- 
ter frame  of  mind  .  .  .  peps  up  pro- 
duction, facts  proved  by  scientific  in- 
vestigation. Sell  your  neighbors  on 
the  street  this  idea. 

Sickroom — A  cheerful  little  earful 
for  the  convalescent  or  the  shut-in. 
Here's  a  gift  market  ripe  for  radio's 
peppy  appearance  and  performance. 

PROMOTING  PORTABLES 

One  important  part  of  the  sales 
style  used  by  H.  C.  Bertine,  of  Kellog 
&  Bertine,  New  York  City,  is  to  offer 
his  prospects  for  portable  radios  com- 
plete information  on  power  facilities 
and  characteristics  at  all  the  near-by 
summer  vacation  spots.  This  indi- 
cates to  prospects  that  Bertine  service 
is  complete,  authentic,  earnest. 

This  radio  man  also  points  out  that 
in  the  matter  of  portable  sets,  people 
buy  because  they  want  pleasant  recep- 
tion at  distant  pleasure  spots;  unless 
you  sell  them  quality  merchandise, 
you're  licked.  Mr.  Bertine  sells  75  per 
cent  of  his  portable  receivers  to  old 
customers,  who  have  learned  to  expect 
non-failure. 

All  types  and  ages  of  customers  are 
interested  in  the  summer  instruments, 
and  this  dealer  finds  it  profitable  to 
mail  thousands  of  flyers  each  summer. 
Some  buyers  want  to  use  them  on 
porches  or  on  terraces  so  that  they  can 
listen  where  it  is  cool ;  manj  want  to 
keep  in  touch  with  news  broadcasts 
while  they're  on  vacation ;  others  don't 
want  to  interrupt  radio  serials  while 
they  have  a  holiday. 

Kellog  &  Bertine  are  featuring  por- 
table sets  made  by  Espey  Mfg.  Co., 
67  Irving  Place,  New  York  City. 


14 


Radio  Today 


A    Message    for   Your    Customers  — 


WHY  YOU  NEED  A  NEW  RADIO! 

Ten  Down-to-Earth  Reasons  for  Buying  an  Up-to-Date  Set 


1— GREATER  ECONOMY  ...  New  tubes  .  .  new 
circuits  .   .   .  slash  operating  costs. 

2— EASIER  TO  TUNE  ...  No  more  hit  and  miss 
tuning  thanks  to  carefully  calibrated  dials.  Stations 
now  come  in  where  expected. 

3— BETTER  TONE  .  .  .  Speech  and  music  re- 
produced with  greater  purity  than  ever  before. 

4— MORE  DISTANCE  .  .  .  Thrilling  distance  re- 
ception at  your  finger  tips,  day  or  night. 

5— INCREASED  SELECTIVITY  ...  You  hear 
just  what  you  tune  to  .  .  no  more  station  mixups. 


6— TITANIC  POWER  ...  All  the  volume  you 
want  when  you  want  it. 

7— LASTS  LONGER  .  .  .  Scientifically  built 
parts  with  rugged  materials  add  pep  and  life. 

8— FINEST  CABINETRY  .  .  .  Breathless  beauty  in 
cabinet  designs  of  wood  and  plastics. 

9— WIDEST  CHOICE  IN  HISTORY  .  .  .  Models 
for  everywhere  and  every  type  of  room  and  home. 

10— IMPROVED  QUALITY  RADIO  TRANS- 
MISSION .  .  .  Yours  .  .  only  if  you  own  the 
superior  radios  of  today  .  .  see  and  hear  one  today! 


July,   1938 


15 


SALES  FEATURES  AND  COMPLETE  SPECIFICATIONS 

17,000  facts  about  the  new  1938-39  sets  compiled  by  Radio  Today 


Automatic  Tuning 


Model 
No. 


List 
price 


Sole       Material 


Wave- 
bands 


Number 
tubes 

(RMA 
defin.) 


Plug-  Cond. 
in     gang     Spkr. 
re-       sec-    size  & 
sistor%  tions  type 


Watts  Power 

audio  Supply 

power  and 

(Max.t  watts 


Vis- 
Tone     ual 
Selec-  con-    tun- 
tivity     trol      ing   Type 


Re- 

-  mote 


Drift  Adjust-  con- 

Comp.  No.   ments    trol    AVC 


I.F. 
Peak 


Andrea 

2-D-5 

6-D-5 

14-E-6 

2-E-6 

2-E-S 


Radio  Corp. 

NS 
NS 
Ns 
NS 
NS 


4823-48th  Ave. 
FT  Wood 

FT  Wood 

FT  Wood 

FT  Wood 

FT  Wood 


Woodside,  L.  I. 
B.Si 
B,Si 
B,S 
B,P,S 
B.P.S 


N.  Y.- 

5-G 

5-G 

6-MO 

6-MO 

8-MO 


'Andrea" 

None 
None 
None 
None 
None 


5-EE 
5-EE 

6H-EE 
6M-EE 
8-EE 


NS 
NS 
NS 
NS 
NS 


AC 
AC 
AC 
AC 
AC 


Fixed 
Fixed 
Fixed 
Fixed 
Var 


Var  None 
Var  None 
Var  None 
Var  None 
None  CR 


None 

Ct 

Ct 

C&It 

C&It 


None 
None 
Yes 
None 


6  2-R 

6  2-R 

6  2-R 

6  2-R 


No 
No 
No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


470 
470 
470 
470 
470 


4-E-8 

NS 

FT 

Wood 

B,P,S 

8-MO 

None 

3 

10-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

4-E-ll 

NS 

VT 

Wood 

B,P,S 

11-MO 

None 

3 

10-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

4-E-6 

NS 

CON 

Wood 

B.P.S 

6-MO 

None 

2 

12-EE 

NS 

AC 

Fixed 

Var 

None 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

6-E-8 

NS 

CON 

Wood 

B.P.S 

8-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

fi 

2-R 

No 

Yes 

470 

6-E-ll 

NS 

CON 

Wood 

B.P.S 

11-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

6-E-6 

NS 

PCM-C 

Wood 

B.Si.S 

7-MO 

None 

2 

12-EE 

NS 

AC 

Fixed 

Var 

None 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

8-E-8 

NS 

PCM-C 

Wood 

B.P.S 

8-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

8-E-ll 

NS 

PCM-C 

Wood 

B.P.S 

11-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

10-E-8 

NS 

PCA-C 

Wood 

B.P.S 

8-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

10-E-ll 

NS 

PCA-C 

Wood 

BP.S 

11-MO 

None 

3 

12-EE 

NS 

AC 

Var 

Var 

CR 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

62PX 

NS 

FT 

Wood 

B.Si 

5-G 

1 

2 

5-EE 

NS 

AC -DC 

Fixed 

Var 

None 

Ct 

No 

6 

2-R 

No 

Yes 

470 

630 

NS 

FT 

Wood 

B,S,,S 

5-MO 

1 

2 

6^-EE 

NS 

AC-DC 

Fixed 

Var 

None 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

632 

NS 

CON 

Wood 

B.Si.S 

5-MO 

1 

2 

12-EE 

NS 

AC-DC 

Fixed 

Var 

None 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

634 

NS 

PC-C 

Wood 

B.Si.S 

5-MO 

1 

2 

12-EE 

NS 

AC-DC 

Fixed 

Var 

None 

C&It 

Yes 

6 

2-R 

No 

Yes 

470 

1530 

NS 

VT 

Wood 

B.P.S 

12-MO 

3 

3 

12-EE 

NS 

AC-DC 

Var 

Var 

CR 

C&It 

Yes 

H 

2-R 

No 

Yes 

470 

1532 
1534 
1536 


NS 
NS 
NS 


CON 

PC 

PCA-C 


Wood 
Wood 
Wood 


B.P.S 
B.P.S 
B.P.S 


12-MO 
12-MO 
12-MO 


3  12-EE 
3  12-EE 
3       12-EE 


NS 
NS 
NS 


AC-DC 
AC-DC 
AC-DC 


Var 
Var 
Var 


Var  CR 
Var  CR 
Var      CR 


C&It 
C&It 
C&It 


Yes 
Yes 
Yes 


6  2-R 
6  2-R 
6       2-R 


No  Yes 
No  Yes 
No       Yes 


470 
470 

470 


Ansley  Radio  Corp. 

,  240  W. 

23rd  St. 

New  York,  N.  Y. — "Ansley  Dynaphone" 

D-9 

$79.50 

PC-PO 

Cloth 

B.S 

6-OM 

1 

2 

6-EE 

2.1 

67  AC          Fixed 

Var 

None 

None 

...     Yes 

456 

D-10 

84.50 

PC-T 

Wood 

B.S 

6-OM 

1 

2 

6-EE 

2.1 

68  AC         Fixed 

Var 

None 

None        

...     Yes 

456 

D-17 

140.00 

PC-C 

Wood 

B,S 

6-OM 

1 

2 

12-EE 

2.1 

68  AC          Fixed 

Var 

None 

None        

...     Yes 

456 

D-18 

190.00 

PCA-C 

Wood 

B.S 

6-OM 

1 

2 

12-EE 

2.1 

80  AC          Fixed 

Var 

None 

None        

...     Yes 

456 

D-21 

170.00 

PC-C 

Wood 

B.S 

12-MO 

1 

2 

12-EE 

9 

138  AC        Fixed 

Var 

None 

None           

...     Yes 

456 

D-22 

220.00 

PCA-C 

Wood 

B,S 

12-MO 

1 

?. 

12-EE 

9 

150  AC        Fixed 

Var 

None 

None       

...     Yes 

456 

D-23 

115.00 

PC-CS 

Wood 

B.S 

6-OM 

1 

2 

12-EE 

2.1 

68  AC         Fixed 

Var 

None 

None        

...     Yes 

456 

D-24 

255.00 

PCA-C 

Wood 

B.P.S 

15-MO 

None 

3 

12-EE 

9 

150  AC        Fixed 

Var 

CR 

None        

...     Yes 

456 

D-25 

205.00 

PC-C 

Wood 

B.P.S 

15-MO 

None 

3 

12-EE 

9 

150  AC        Fixed 

Var 

CR 

None       

...     Yes 

456 

D-27 

480.00 

PCA-C 

Wood 

B.P.S 

15-MO 

None 

3 

12-EE 

9 

150  AC       Fixed 

Var 

CR 

None        

...     Yes 

456 

U-10 

44   50 

FT 

Wood 

B,S 

6-OM 

1 

2 

6-EE 

2.1 

55  AC-DC  Fixed 

Var 

None 

None        

...     Yes 

456 

U-ll 

49.50 

PORT 

Wood 

B.S 

6-OM 

1 

2 

6-EE 

2.1 

55  AC-DC  Fixed 

Var 

None 

None        

...     Yes 

456 

AC-DC  Models  available  for  $5  additional. 


Automatic  Radio  Mfg.  Co. 

Inc.,  122  Brookline 

Ave 

,  Boston, 

Mass. — 

'Automatic", 

"Tom  Th 

umb" 

40                     $6.95 

MT 

Wood 

B 

3-G 

1 

2 

5-PM 

% 

39  AC-DC  Fixed 

None 

None 

None 

50                        7.95 

MT 

Wood 

B 

4-G 

1 

2 

5-EE 

1.2 

41  AC-DC  Fixed 

None 

None 

None 

325                   12.95 

MT 

Wood 

B 

4-G 

1 

2 

5-EE 

1.2 

41  AC-DC  Fixed 

None 

None 

None 

326                   12.95 

MT 

Wood 

B 

4-G 

1 

2 

5-EE 

1.2 

41  AC-DC  Fixed 

None 

None 

None 

845                   16.95 

MT 

Wood 

B 

5-GO 

1 

2 

5-EE 

2.2 

40  AC-DC  Fixed 

Step 

None 

None 

No 

TRF 

No 

TRF 

No 

TRF 

No 

TRF 

Yes 

456 

850 

22 .  95 

FT 

Wood 

B.S 

5-GO 

1 

2 

5-EE 

2.2 

40  AC-DC  Fixed 

None 

None 

None 

Yes 

456 

855 

24.95 

FT 

Wood 

B.S 

6-GO 

1 

2 

5-EE 

2.2 

40  AC-DC  Fixed 

None 

None 

C&It 

CC 

6 

2-R 

No 

Yes 

456 

878 

29.95 

FT 

Wood 

B.Si.S 

8-G 

1 

2 

6-EE 

Wi 

44  AC-DC  Fixed 

Var 

CR 

None 

Yes 

456 

892 

59.95 

CON 

Wood 

B.Si.S 

10-GO 

2 

o 

12-EE 

5 

88  AC-DC  Fixed 

Var 

CR 

C&It 

cc 

6 

2-R 

No 

Yes 

456 

915 

19.95 

MT 

Wood 

B.S, 

5-GO 

1 

2 

5-EE 

2.2 

40  AC-DC  Fixed 

None 

None 

None 

Yes 

456 

920 

14.95 

MT 

Wood 

B 

5-G 

1 

2 

5-EE 

1.2 

41  AC-DC  Fixed 

None 

CR 

None 

Yes 

TRF 

933 

9.95 

MT 

Metal 

B 

4-o 

None 

2 

3-EE 

1.2 

41  AC-DC  Fixed 

None 

None 

None 

No 

TRF 

935 

14.95 

MT 

Plastic 

B 

4-o 

None 

2 

3-EE 

12 

41  AC-DC  Fixed 

None 

None 

None 

No 

TRF 

950 

19.95 

MT 

Wood 

B 

5-o 

None 

2 

3-EE 

2.2 

40  AC-DC  Fixed 

None 

None 

None 

Yos 

456 

Breting  Radio  Mfg 

Co.,  1815  Venice  Blvd.,  Los  Angeles,  Calif. 

—"Breting" 

9 

$90.00 

T 

Metal 

B.P.S.U 

9-MG 

None 

3 

8-EE 

4. 

90  AC 

Fixed 

Var 

M 

None 

Yes 

432 

14AX 

165.00 

T 

Metal 

B.P.S.U 

14-MG 

None 

4 

12-EE 

18 

125  AC 

Fixed 

Var 

M 

None 

Yes 

432 

14AX 

275.00 

CON 

Wood 

B.P.S.U 

14-MG 

None 

4 

12-EE 

18 

125  AC 

Fixed 

Var 

M 

None 

Yes 

432 

Continental  Radio 

&  Television  Corp 

,  3800  Cortland  St.,  Chicago,  111. 

— "Admiral" 

925-16R 

$159.50 

CON 

Wood 

B.P.S 

16-0 

None 

3 

12-EE 

25 

AC 

Var 

NS 

AFC 

13 

1-R 

No 

Yes 

456 

930-16R 

169.50 

CON 

Wood 

B.P.S 

16-0 

None 

3 

12-EE 

25 

AC 

Fixed 

Var 

NS 

AFC 

13 

1-R 

No 

Yes 

456 

940-1  IS 

99.95 

CON 

Wood 

B,P,S 

ll-O 

None 

3 

12-EE 

10 

AC 

Var 

NS 

AFC 

13 

1-R 

No 

Yes 

456 

935-1  IS 

109.95 

CON 

Wood 

B,P,S 

ll-O 

None 

3 

12-EE 

10 

AC 

Var 

None 

NS 

AFC 

13 

1-R 

No 

Yes 

456 

915-9B 

89.95 

CON 

Wood 

B.P.S 

9-G 

None 

3 

12-EE 

9 

AC 

Fixed 

Var 

None 

NS 

CC 

13 

1-R 

No 

Yes 

456 

102-6B 

29.95 

T 

Plastic 

B,S 

6-G 

None 

2 

6-EE 

1M 

AC 

Var 

None 

Motor 

None 

6 

1-R 

No 

Yes 

456 

103-6B 

39.95 

T 

Plastic 

B,S 

6-G 

None 

2 

6-EE 

1H 

AC 

Var 

None 

None 

Yes 

456    II 

516-5F 

13.95 

T 

Plastic 

B 

5-G 

None 

2 

5-EE 

IK 

AC 

Var 

None 

None 

Yes 

456    ! 

517-5F 

16.95 

T 

Plastic 

B 

5-G 

None 

2 

5-EE 

IK 

AC 

Var 

None 

None 

Yes 

456    il 

535-5J 

12.95 

T 

Plastic 

B 

5-o 

None 

2 

4-EE 

2 

AC 

Fixed 

NS 

None 

None 

Yes 

456 

129-5F 

16.95 

T 

Wood 

B 

5-G 

None 

2 

5-EE 

1M 

AC 

None 

None 

Yes 

4^     1 

527-5X 

19.95 

T 

Wood 

B.Si 

5-G 

None 

2 

6-EE 

2 

AC 

None 

None 

Yes 

456 

113-5A 

16.95 

T 

Plastic 

B 

5-G 

None 

2 

5-EE 

2 

AC 

Step 

NS 

None 

4 

1-R 

No 

Yes 

456 

114-5A 

17.95 

T 

Plastic 

B 

5-G 

None 

2 

5-EE 

2 

AC 

NS 

None 

4 

1-R 

No 

Yes 

456 

115-5  A 

19.95 

T 

Plastic 

B 

5-G 

None 

2 

5-E 

2 

AC 

Fixed 

Step 

None 

NS 

None 

4 

1-R 

No 

Yes 

456 

{Continued  on  page  18) 


%  Line  voltage  dropping  resistors  of  plug-in  type,  commonly  referred  to  as  ballast  resistors  or  tubes. 


NOTES 


NS — Data  not  supplied 

CABINET  STYLE 
CS— Chalrside 
CON— Console   (Also  C) 
FT— Flat  table 
F — Furniture  design 
MT — Miniature  table 
PC — Phonograph  Combination 
PCA — Phonograph  combination  with  automatic 

record  changer 
PCM — Phonograph  combination — manual  change 

of  records 
PORT— Portable   (Also  P) 
T— Table 
VT— Vertical  table 


WAVEBANDS 

B— Broadcast    (approx.   540-1700  KC) 

P— Police  (approx.   1700-5500  KC) 

Pi— Police   (approx.   1600-3500  KC) 

S — Shortwave    (approx.   5500-20,000  KC) 

S! — Medium    shortwave    (approx.    2500-7000) 

U — Ultra  short  wave   (above  25,000  KC) 

W— Weather  band   (approx.   150-350  KC) 

TUBES 

G— Glass    (old  style) 

0 — Octal   glass 

o — Octal    glass — midget   type 

M— Metal 

GM — Mainly  glass,  some  metal 

GO — Mainly  glass,  some  octal  glass 

MG — -Mainly   metal,   some  glass 

MO — Mainly  metal,  some  octal  glass 

0G — Mainly  octal  glass,  some  glass 

0M — Mainly  octal  glass,  some  metal 


SPEAKER   TYPE 

EE— Electrically  excited  dynamic 

Mafl — Magnetic 

PM — Permanent  magnet  dynamic 

POWER  SUPPLY 

AC — Alternating  current 

AC- DC — -Either    alternating   or   direct   current 

SELECTIVITY 

Fixed — Non-adjustable    selectivity 

Var — Selectivity  adjustable  from  panel  of  set 

TONE    CONTROL 

Step — Step  type   of  tone  control — 2  or  more 

points 
Var — Continuously  variable  tone  control 

VISUAL  TUNING 

CR — Cathode  ray  indicator  tube 


AUTOMATIC  TUNING 

Type 

Ct — Condenser  trimmer 

C&It— Condenser  and  inductance  trimmer 

It — Inductance  trimmer 

Mech — Mechanical  type  of  unit 

Motor — Motor  operated  mechanism 

Drift  compensation 
AFC — Automatic   frequency   control 
CC — Compensating  condenser 

No.  of  adjustments  per  station  and  location 
B — Bottom  adjusted 
F — Front   adjusted 
R — Rear  adjusted 

Remote  control 
Opt — Optional 


16 


Radio  Today 


MORE  NEW  SETS 

FOR  THE 
1938-39  SEASON 

(Continued  from  June  issue) 

Above — General   Electric's  9-tube   Radio- 
forte,  $175. 

Upper  right — Stewart-Warner's  91-817,  8 
tubes. 

Left — Stromberg-Carlson's    Corner    Con- 
sole 350-V.,  $199.50. 

Right — Westinghouse  366,  8  tubes,  motor 
tuning. 

Bottom    left — Sparton    8618,    push-button 
console,  $89.95. 

Bottom  center — Admiral  No.  144-16S  com- 
bination, $295. 

Bottom   right — Stromberg-Carlson   350M, 
$175. 

Radio  Today,  July,  1938 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS— Compiled  by  Radio  Today 


Automatic  Tuning 


Model 
No. 


List 
price 


Style       Material 


Wave- 
bands 


Number 

tubes 
(RMA 

defin.) 


Plug-  Cond. 
in    gang     Spkr. 
re-       sec-    size  & 
sistor%  (ions  type 


Watts 
audio 
power 

(Max.) 


Power 
Supply 
and 

watts 


Selec- 
tivity 


Vis- 
Tone  ual 
con-  tun- 
trol      ing   Type 


Re- 
mote 


Drift  Adjust-  con- 

Comp.  No.   ments    trol    AVC 


I.F 
Peak 


Continental  Radio 
123-5E  15.00 

124-5E  15.00 

125-5E  15.00 

126-5E  15.00 

123-4H  10.00 


&  Television  Corp. 

T  Plastic 

T  Plastic 

T  Plastic 

T  Plastic 

T  Plastic 


5-M 
5-M 
5-M 
5-M 
5-o 


None 
None 
None 
None 
None 


2  4-EE  2 

2  4-EE  2 

2  4-EE  2 

2  4-EE  2 

2  4-EE  2 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 

Step  None 

Step  None 

Step  None 

Step  None 


None 
None 
None 
None 
None 


Yes 
Yes 
Yes 
Yes 
No 


456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 


124-4H 
125-4H 
126-4H 
516-5C 
517-5C 


12.50 
12.50 
12.50 
9.95 
12.95 


Plastic  B 

Plastic  B 

Plastic  B 

Plastic  B 

Plastic  B 


5-o  None 

5-o  None 

5-o  None 

5-GO  incl.  resistor 
5-GO  incl  resistor 


2  4-EE  2 

2  4-EE  2 

2  5-EE  2 

2  5-EE  2 

2  5-EE  2 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 

Step  None 

Step  None 

Step  None 

Step  None 


None 
None 
None 
None 
None 


No 
No 
No 
No 
No 


520-5C 
521-5C 
520-5F 
521-5F 
510-6B 


19.95 
29.95 
24.95 
34.95 
67.50 


PC-T 
PC-T 
PC-T 
PC-T 
PC-T 


Wood 
Wood 
Wood 
Wood 
Wood 


B 

B 
B 
B 
B.S 


5-GO  incl,  resistor 
5-GO  incl.  resistor 
5-G  None 

5-G  None 

6-G  None 


2  5-EE  2 

2  5-EE  2 

2  5-EE  1  }4 

2  5-EE  1H 

2  8-EE  2 


AC 
AC 
AC 
AC 
AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 

Step  None 

Step  None 

Step  None 

Var  None 


None 
None 
None 
None 
None 


No 
No 
No 
No 
Yes 


144-16S         295.00       PC-C       Wood 


B.P.S 


Detrola  Corp.,  1501  Beard  Ave..  Detroit.  Mich.- 
216  $10.00r    MT  Plastic         B 

218  15.00       MT  Plastic         B.P 

219  20.00j     MT  Plastic         B,Si 
208A                  9.95tt  FT  Plastic         B 
211A                 16.95       FT  Plastic         B.Si 


16-0 
"Detrola" 

4-M 

4-M 

5-M 

4-GO 

5-GO 


None 

None 
None 
None 


12-EE 

NS 

NS 

NS 

5-EE 

5-EE 


25 

NS 

NS 
NS 
NS 
NS 


AC 

AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed     Var      None      None 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

None  None 

None  None 

None  None 


None 
None 
None 
None 
None 


No 
No 
Yes 
No 
Yes 


456 

TRF 
TRF 

NS 
TRF 

NS 

NS 

NS 

NS 

NS 

NS 

NS 

NS     ■ 

NS 

NS 

NS 

TRF 

NS 

NS 

NS 

NS 


455 
455 
455 
455 
455 


212EA 
227A 
221 A 
222A 
225A 


19.95 
29.50 
34.50 
39.50 
44.50 


FT 
FT 
FT 
FT 
FT 


NS 
NS 

NS 
NS 
NS 


B,Si 
B.Si 
B.S, 
B.S, 
B.P.S 


6-GO 
5-GO 
5-GO 
6-GO 
7-GO 


5-EE 
5-EE 
5-EE 
5-EE 
61^-EE 


NS 
NS 
NS 
NS 
NS 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Yes  CR 

Yes  None 

Yes  None 

Yes  None 

Yes  None 


None 
Mech 
Mech 
Mech 
Mech 


NS 
NS 
NS 
NS 


4  NS 

6  NS 

6  NS 

6  NS 


No 
No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


226A 

29.50 

FT 

NS 

B.Si 

5-GO 

None 

2 

5-EE 

NS 

AC 

Fixed 

Yes 

None 

Mech 

NS 

4 

NS 

No 

Yes 

NS 

220A 

34.50 

FT 

NS 

B.Si 

6-GO 

None 

?. 

5-EE 

NS 

AC 

Fixed 

Yes 

None 

Mech 

NS 

6 

NS 

No 

Yes 

NS 

233A 

44.50 

FT 

NS 

B.P.S 

7-GO 

None 

?. 

6  4-EE 

NS 

AC 

Fixed 

Yes 

None 

Mech 

NS 

6 

NS 

No 

Yes 

NS 

209EA 

57.50 

FT 

NS 

B.P.S 

8-GO 

None 

3 

8-EE 

NS 

AC 

Fixed 

Yes 

CR 

It 

NS 

6 

NS 

No 

Yes 

NS 

231A 

59.50 

FT 

NS 

B.P.S 

9-GO 

None 

3 

8-EE 

NS 

AC 

Fixed 

Yes 

CR 

Motor 

NS 

8 

NS 

Opt. 

Yes 

NS 

208AP 
228P 
228  A  P 
233AP 
234P 


34.50 
99.50 
94.50 
84.50 
79.50 


PC-T 
PC-P 
PC-T 
PC-T 
PC-P 


NS 
NS 
NS 
NS 
NS 


B 

B.P.S 

B.P.S 

B.P.S 

B.S, 


4-GO  1 

7-GO  None 

7-GO  None 

7-GO  None 

5-GO  1 


f  In  colors  $12.50.     if  De  Luxe  model  $22.50.     tt  In  ivory  $12.50. 
Emerson  Radio  &  Phonograph  Corp.,  Ill  8th  Ave..  New  York.  N.  Y. 


5-EE 
6  4-EE 
64-EE 
6M-F.E 
64-EE 


NS 

NS 
NS 
NS 
NS 


AX-211 
AX-217 
AX-233 
AX-212 
BM-206 


$9.95# 
14.95 
17.95 
19.95 
9.95,5 


MT 
MT 
MT 
MT 
T 


Plastic 
Wood 
Plastic 
Wood 
Plastic 


5-M 
5-M 
5-M 
5-M 


None 
None 
None 
None 


5-GO  incl.  resistor 


"Emerson" 

2      4-EE  24 

2      4-EE  24 

2      4-EE  24 

2      4-EE  24 

2       5-EE  2]4 


AC 

AC-DC 

AC-DC 

AC 

AC-DC 


45  AC-DC 
45  AC-DC 
45  AC-DC 
45  AC-DC 
45  AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Yes 
Yes 
Yes 
Yes 
Yes 


None 
None 
None 
None 
None 


None  None 
None  None 
None  None 
None  None 
None    None 


None 
Mech 
Mech 
Mech 
Mech 


None 
None 
None 
None 
None 


NS 
NS 
NS 
NS 


6  NS 

6  NS 

6  NS 

4  NS 


No 
No 
No 
No 


No 
Yes 
Yes 
Yes 
Yes 


Yes 
Yes 
Yes 
Yes 
Yes 


BY-233 

12.95 

VT 

Plastic 

B 

Q-236 

14.95 

T 

Wood 

R 

BB-208 

14.95 

FT 

Plastic 

B 

BM-215 

14.95 

T 

Wood 

B 

BB-209 

19.95 

FT 

Wood 

B 

6-GO  incl.  resistor 
4-GO         None 
5-GO  incl.  resistor 
5-GO  incl.  resistor 
5-GO  incl.  resistor 


2  5-EE  24 

2  5-EE  24 

2  5-EE  24 

2  5-EE  2Y2 

2  5-EE  2Y2 


45  AC-DC 
45  AC-DC 
45  AC-DC 
45  AC-DC 
45  AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

None  None 

None  None 

None  None 


None 
None 
Mech 
None 
Mech 


None 
None 


1-F 

i-F' 


Yes 
No 
No 

No 
No 


155 

TRF 

TRF 

TRF 

TRF 


BE-198  19.95r 

BJ-200  19.95* 

BL-200  19.95«i 

BJ-210  24.95 

BL-210  24.95 


FT 
FT 
FT 
FT 
FT 


Plastic 

Plastic 

Plastic 

Wood 

Wood 


B 

B.P 

B.P 

B.P 

B,P 


5-GO         None 
6-GO  incl.  resistor 
5-GO  None 

6-GO  incl.  resistor 
5-GO         None 


2  64-EE  3 

2  64-EE  24 

2  64-EE  3 

2  64-EE  2V2 

2  6U-EE  3 


45  AC 
45  AC-DC 
45  AC 
45  AC-DC 
45  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

None  None 

None  None 

None  None 


Ct 

None 
None 
None 
None 


Yes 
Yes 
Yes 
Yes 
Yes 


455 
455 
455 
455 
455 


AU-190 
BF-207 
AA-207 
CA-234 
AU-213 


24 .  95 

24.95t 

29.951 

29.95 

29.95 


BF-204  29.95 

AA-204  34.95 

BJ-214  29.95 

BL-214  29.95 

BD-197  39.95 


VT 
FT 
FT 
FT 
VT 
FT 
FT 
FT 
FT 
FT 


Plastic  B,P 

Plastic  B.S 

Plastic  B.S.W 

Wood  B 

Wood  B.P 


5-GO  None 

6-GO  incl.  resistor 
6-GO  incl.  resistor 
6-GO  incl.  resistor 
5-GO         None 


2  5-EE  24 

2  64-EE  2V2 

2  64-EE  2Y2 

2  5-EE  24 

2  5-EE  2y2 


45  AC-DC 
50  AC-DC 
50  AC-DC 
45  AC-DC 
45  AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 

Step  None 

Step  None 

None  None 

Steo  None 


None 
None 
None 
Mech 
None 


Yes 
Yes 

Yes 
No       Yes 
Yes 


Wood  B.S 

Wood  B.S.W 

Wood  B.P 

Wood  B.P 

Wood  B.S 


6-GO  incl.  resistor 
6-GO  incl.  resistor 
6-GO  incl.  resistor 
5-GO         None 
6-GO  incl.  resistor 


2  64-EE  2y2 

2  64-EE  24 

2  64-EE  24 

2  64-EE  3 

2  6U-EE  24 


50  AC-DC 
50  AC-DC 
45  AC-DC 
45  AC 
50  AC -DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 
Step  None 
None  None 
None  None 
Step     None 


None 
None 
None 
None 
None 


Yes 
Yes 
Yes 
Yes 
Yes 


455 
455 
455 
455 
455 
455 
455 
455 
455 
455 


BF-169  39.95 

BW-231  39.95 

BQ-228  49.95 

BO-229  59.95 

BM-216  19.95 


FT 

Wood 

B.S 

6-GO  incl.  resistor 

FT 

Wood 

B.S 

6-OM         None 

FT 

Wood 

B.S 

6-OM         None 

FT 

Wood 

B.S 

7-OM         None 

PC-T 

Wood 

B 

5-GO  incl.  resistor 

2  64-EE  24 

2  64-EE  5 

2  64-EE  5 

2  64-EE  5 

2  5-EE  24 


50  AC-DC 

55  AC 
55  AC 
58  AC 
55  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step 
Step 
Step 
Step 
Step 


None 

None 

None 

CR 

None 


None 
None 
Mech 
Mech 
None 


Yes 
Yes 
No  Yes 
No  Yes 
No 


455 
455 
455 
155 
TRF 


AX-219 
AX-221 
AX-221 
BL-220 
BJ-220 


29.95 
44.95 
54.95 
59.95 
69.95 


PC-T 
PC-T 
PC-T 
PC-T 
PC-T 


Wood 
Wood 
Wood 
Wood 
Wood 


B,P 
B.P 


5-M  None 

5-M  None 

5-M  None 

5-GO         None 
6-GO  incl.  resistor 


2  4-EE  2' 

2  64-PM  3 

2  64-PM  3 

2  64-PM  5 

2  8-PM  3 


55  AC 
65  AC 
65  AC-DC 
65  AC 
65  AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  None 

Var  None 

Var  None 

Var  None 

Var  None 


None 
None 
None 
None 
None 


Yes 
Yes 
Yes 
Yes 
Yes 


455 
455 
455 
455 
455 


BL-218  69.95 

BJ-218  79.95 

AX-222  59.95 

AX-232  99.95 

AX-232  109.95 


PC-T 

PC-T 

PC-P 

PCA-P 

PCA-P 


Wood  B.P 

Wood  B.P 

Fabricoid  B 

Fabricoid  B 

Fabricoid  B 


5-GO         None 
6-GO  incl.  resistor 
5-M  None 

5-M  None 

5-M  None 


2  8-PM  5 

2  8-PM  3 

2  64-PM  3 

2  64-PM  3 

2  64-PM  3 


65  AC 
65  AC-DC 
65  AC-DC 
65  AC 
65  AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  None 

Var  None 

Var  None 

Var  None 

Var  None 


None 
None 
None 
None 
None 


Yes 
Yes 
Yes 
Yes 
Yes 


455 
455 
455 
455 
455 


BQ  233  129.95 

BR-224  169.95 

BR-224A  219.95 

X-175  750.00 

BQ-225  69.95 


PC-C 

PC-C 

PCA-C 

PC-C 

CON 


Wood  B.S 

Wood  B.P.S 

Wood  B.P.S 

Wood  B.P.S 

Wood  B.S 


6-OM 

13-MO 

13-MO 

15-M 

6-OM 


None 
None 
None 
None 
None 


2  10-EE  5 

3  10-EE  15 
3  10-EE  15 
3  15-EE  15 
2  10-EE  5 


BU-230  89.95 

BR-226  109.95 

BS-227  119.95 

f  In  Ivory  for  $12.95. 
EBpey  Mfg.  Co.,  Inc 
851  $19.95 

1-861  39.50 

2-861  42.50 

3-861  47.50 

13-861  49.50 


CON- 
CON 
CON 

II  In  I 
.,67  1 
MT 
F 

CS 
F 
F 


Wood  B.S 

Wood  B.P.S 

Wood  B.P.S 

vory  for  $24.95.     t  Ivory 
ing  Place.  New  York.  N. 

Wood  B 

Wood  B.S 

Wood  B,S 

Wood  B.S 

Wood  B.S 


75  AC 
150  AC 
150  AC 
150  AC 
150  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step 
Var 
Var 
Var 
Step 


None 

None 

None 

CR 

None 


Mech 
Mech 
Mech 
None 
Mech 


None 
None 
None 


1-F 
1-F 
1-F 


No 
No 
No 


Yes 
Yes 
Yes 
Yes 

Yes 


7-OM  None 
13-MO  None 
15-MO  None 
for  $5  additional. 
Y. — "Espey" 
5-M  None 

5-OM  1 

5-OM  1 

5-OM  1 

5-OM  1 


2  10-EE        5 

3  10-EE        15 
3       10-EE        15 


2  3-EE  1.7 

2  6-EE  2 

2  6-E  2 

2  6-EE  2 

2  6-EE  2 


150  AC 
150  AC 
150  AC 


AC-DC 
AC-DC 
AC-DC 
AC- DC 
AC- DC 


Fixed 

Fixed 
Fixed 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step     CR 
Var      None 
Var      CR 


None  None 

None  None 

None  None 

None  None 

None  None 


Mech 
Mech 
Mech 


None 
None 
None 
None 
None 


None 
None 
None 


6  1-F 
6  1-F 
6       1-F 


No 
No 
No 


Yes 
Yes 
Yes 


455 
455 
455 
455 
455 
455 
455 
455 


7-861 

10-891 

11-7151 

861A 

861B 


59.50 
115.00 
155.00 
25.00 
25.00 


F 

CON 

CON 

FT 

PORT 


Wood  B.S 

Wood  B.P.S 

Wood  B.P.S.U.W 

Wood  B.S 

Cloth  B.S 


5-OM 

9-MO 

15-MG 

5-OM 

5-OM 


1 
None 
None 

1 

1 


2  6-EE  2 

2  12-EE  2y2 

3  12-EE  10 
2  6-EE  2 
2  6-EE  2 


40 
45 
100 
40 
40 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None    None 
Var      CR 
Var      CR 
None    None 
None   None 


None 
None 
None 
None 
None 


861C 

32.50 

PORT 

Cowhide 

B.S 

5-OM 

1 

161 R 

27.50 

PORT 

Rawtex 

B.S 

5-OM 

1 

771G 

75.00 

FT 

Leather 

B.S 

6-OM 

1 

771H 

75.00 

FT 

Leather 

B.S 

6-OM 

1 

2  6-EE  2 

2  6EE  2 

2  6-EE  2y2 

2  6-EE  2.4 

(Continued  on 


40  AC- DC 

Fixed 

None 

None 

None 

40  AC-DC 

Fixed 

None 

None 

None 

40  AC-DC 

Fixed 

Var 

None 

None 

40  AC-DC 

Fixed 

Var 

None 

None 

page  20) 


%  Line  voltage  dropping  resistors  of  plug-in  tyne.  commonly  referred  to  as  ballast  resistors  or  tube 


18 


Index  to  codes  on  pages  16  and  34 


Radio  Today 


Top   left- 
Howard  model  325D 
Top  right — Majestic's  new 
Charley  McCarthy  set  and  Charley 
Middle    left  —  Crosley's    model    718A 
Center — Emerson's  "Snow  White,"  $14.95 
Right  —  FadaLette     5F60C     superhet 
Bottom    left— RCA's    HF-2,   $165 
Right— Philco   19PCS  arm 
chair    combination 


RADIO  TODAY 
July,  1938 


Sparton  Model  5518A,  5  tubes  $19.95. 


DeWald  Pierce-Airo  with  push-button  tuning. 


Sentinel   Super  No.   127BT. 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS— Compiled  by  Radio  Today 


Automatic  Tuning 


Model 
No. 


List 
price 


Style       Material 


Wave- 
bands 


Number 
tubes 

(RMA 
denn.) 


Plug-  Cond. 
in     gang      Spkr. 
re-       sec-    size  & 
sistor%  tions  type 


Watts  Power  Vis- 
audio  Supply  Tone  ual 
power  and  Selec-  con-  tun- 
(Max.)  watts  tivity     trol      Ing   Type 


Re- 
-  mote 


Drift  Adjust-  con- 

Comp.   No.   ments    trol    AVC 


I.F. 
Peak 


Fada  Radio  &  Electric  Co. 

5F60W/V/T  NS  MT 

470W/V/T/R  T 

461T/K/L     NS  T 

461C  NS  CON 

6A61W/V     NS  T 


30-20  Thomson  Ave., 
I  Plastic  1        B 


\Wood  | 
Wood 
Wood 
Plastic 


B,S 
B.S 
B.S 
B.S 


Long  Island 
5-o 
6-OG 
5-GO 
5-GO 
5-GO 


City.  N. 
None 
1 
1 
1 
1 


Y.- 


'Fada  Radio" 


4-EE 

6H-EE 

6H-EE 

8-EE 

5H-EE 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC- DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

Yes  None 

Yes  None 

Yes  None 

None  None 


None 
None 
None 
None 
Mech 


Yes 
Yes 
Yes 
Yes 
Yes 


6A61C 

NS 

CON       Wood 

B.S 

5-GO 

1 

2 

8-EE 

2 

AC-DC 

Fixed 

None 

None 

Mech 

None 

6 

1-F 

No 

Yes 

456 

470C 

NS 

CON       Wood 

B.S 

6-OG 

1 

2 

10-EE 

2 

AC-DC 

Fixed 

Yes 

None 

None 

Yes 

456 

470PC 

NS 

PCM-C  Wood 

B.S 

6-OG 

1 

2 

10-EE 

2 

AC-DC 

Fixed 

Yes 

None 

None 

Yes 

456 

470APC 

NS 

PCA-C    Wood 

B.S 

6-OG 

1 

2 

10-EE 

2 

AC-DC 

Fixed 

Yes 

None 

None 

Yes 

456 

6A70T 

NS 

T           Wood 

B.S 

6-OG 

1 

2 

8-EE 

2 

AC-DC 

Fixed 

Yes 

None 

Mech 

CC 

6 

IF 

No 

Yes 

456 

6A70C  NS 

451T/K/L     NS 
6A51W  V 
6A51C 
465W/V 


NS 
NS 

NS 


CON 

T 

T 

CON 

T 


Wood 
Wood 
Plastic 
Wood 
Plastic 


B.S 
B,S 
B.S 
B.S 
B.S 


465TR/T 

465C 

465PC 

465APC 

6A65T 


NS 
NS 
NS 
NS 
NS 


T 

CON 

PCM-C 

PCA-C 

T 


Wood 
Wood 
Wood 
Wood 
Wood 


B.S 
B.S 
B.S 
B.S 
B.S 


6-OG 
5-GO 
5-GO 
5-GO 
6-OG 
6-OG 
6-OG 
6-OG 
6-OG 
6-OG 


1 
None 

None 
None 
None 


10-EE 
6H-EE 
5>^-EE 
6><-EE 
6H-EE 


2 
2 
2 

2 
4M 


AC-DC 

AC 

AC 

AC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Yes  None 
Yes  None 
None  None 
None  None 
Yes       None 


Mech 
None 
Mech 
Mech 
None 


None 
None 


1-F 
1-F 


None 
None 
None 
None 
None 


6H-EE 

10-EE 

12-EE 

12-EE 

8-EE 


4J4 
4% 
4K 
4X 
4% 


AC 
AC 
AC 
AC 
AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Yes 
Yes 
Yes 
Yes 
Yes 


None 
None 
None 
None 
None 


None 
None 
None 
None 
Mech 


No  Yes 
....  Yes 
No  Yes 
No  Yes 
Yes 


Yes 
Yes 
Yes 
Yes 
Yes 


6A65C 

NS 

CON 

Wood 

B.S 

6-OG 

None 

?. 

10-EE 

4H 

AC 

Fixed 

Yes 

None 

Mech 

CC 

6 

1-F 

No 

Yes 

456 

6A80T 

NS 

T 

Wood 

B.P.S 

8-OM 

None 

3 

8-EE 

4H 

AC 

Fixed 

Yes 

CR 

Mech 

CC 

6 

1-F 

No 

Yes 

456 

6A80C 

NS 

CON 

Wood 

B.P.S 

8-OM 

None 

3 

12-EE 

4\i 

AC 

Fixed 

Yes 

CR 

Mech 

CC 

6 

1-F 

No 

Yes 

456 

6A80CA 

NS 

CON 

Wood 

B.P.S 

8-OM 

None 

3 

12-EE 

Wi 

AC 

Fixed 

Yes 

CR 

Mech 

CC 

6 

1-F 

No 

Yes 

456 

6A80APC 

NS 

PC-C 

Wood 

B.P.S 

8-OM 

None 

3 

15-EE 

4H 

AC 

Fixed 

Yes 

CR 

Mech 

CC 

6 

1-F 

No 

Yes 

456 

560PT  NS 

554PT  NS 

451PT  NS 

461PT  NS 

546W/V/G/R/B/T 


PC-T 
PC-T 
PC-T 
PC-T 


Wood 
Wood 
Wood 
Wood 
/  Plastic  1 
\Wood  / 


B.P 
B,P 
B.S 
B.S 

B 


5-GO 
5-GO 
5-GO 
5-GO 

5-GO 


1 
None 
None 

1 


5-EE 
5-EE 

6H-EE 
6H-EE 

5-EE 


AC-DC 
AC 
AC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 


Yes  None 

Yes  None 

Yes  None 

Yes  None 


None 
None 
None 
None 


AC-DC         Fixed     No       None     None 


Fairbanks-Morse  &  Co.,  Home  Appliance  Div.,  Indianapolis,  Ind. — Information  not  available  up  to  July  15.  See  August  issue  of  RADIO    TODAY 


Index  to  codes  on  pages  16  and  34 


Yes 
Yes 
Yes 
Yes 

Yes 


456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 
456 


Westinghouse   No.   WR-262,   6   tubes. 
Motorola   No.  59T5  $29.95. 


General  Electric  6D52,  $22.95. 
Crosley  "Sixer,"  No.  628B  $19.99 


Howard  No.  468,  7  tubes. 
Stewart-Warner    No.    91-513. 


Wilcox-Gay  "Thin  Man"  A  53. 


Detrola  Super  Pee  Wee  $20. 


Stromberg-Carlson   No.  340   H.  $115. 


S'ALEi 

1  rtAlU 

RES  AND 

SPtUIr 

IUAMU 

NS 

Jh  IHt 

iyaa- 

39  SETS 

— c 

ompiled 

by  J 

<sdio 

/ 

oday 

Number 

tubes 
(RMA 

defin.l 

Plug- 

Cond. 

Jang     Spkr. 
sec-    size  & 
tions  type 

Watte 
audio 
power 

(Hai.) 

Power 
Supply 
and 

watts 

Tone 
-  con- 
trol 

Vis- 
ual 
tun- 
ing 

Automatic  Tuning 

Stations 

Re- 

Model 
No. 

List 
price 

,. 

re- 
sistor % 

Selec 

tivity 

Drift 
Comp. 

Adjust 
nients 

in     t 

I.F. 
Peak 

Style 

Material 

bands 

Type 

No. 

trol 

AVC 

Calvin  Mfg.  Corp., 

4545  Augusta  Blvd 

,  Chicago,  111 

— "Motorola" 

59T1 

$14.95 

FT 

Wood 

B 

4-GO 

1 

2 

5-EE 

.7 

45  AC-DC 

Fixed 

None 

None 

None 

Yes 

455 

59T2 

19.95 

FT 

Wood 

B 

5-G 

None 

2 

5-EE 

3 

50  AC-DC 

Fixed 

None 

None 

None 

Yes 

455 

59T3 

19.95 

FT 

Wood 

B 

4-GO 

1 

2 

5-EE 

.7 

45  AC-DC 

Fixed 

None 

None 

Mech 

CC 

4 

1 

No 

Yes 

455 

59T4 

24.95 

FT 

Wood 

B 

5-G 

None 

2 

5-EE 

3 

50  AC 

Fixed 

None 

None 

Mech 

cc 

4 

1 

No 

Yes 

455 

59T5 

29.95 

FT 

Wood 

B.S 

5-G 

None 

2 

6-EE 

4H 

55  AC 

Fixed 

Var 

None 

Mech 

CC 

6 

1 

No 

Yes 

455 

Console  Models  to  be  announced  later. 

General  Electric  Co..  1285  Boston  Ave 

,  Bridgeport,  Conn. — ' 

G-E" 

GD-41 

$12.95 

MT 

Wood 

B 

4-GO 

1 

2 

1-EE 

1.8 

50  AC-DC 

Fixed 

None 

None 

None 

No 

TRF 

GD-52 

22.95 

FT 

Wood 

B 

5-OM 

1 

2 

5-EE 

2.1 

50  AC-DC 

Fixed 

None 

None 

Ct 

None 

5 

2-B 

No 

Yes 

455 

G-50 

29.95 

FT 

Wood 

B 

5-G 

None 

2 

6M-EE 

4H 

50  AC 

Fixed 

Step 

None 

Mech 

None 

8 

1-F 

No 

Yes 

465 

GD-62 

29.95 

FT 

Wood 

B 

5-GO 

1 

2 

6H-PM 

2M 

45  AC-DC 

Fixed 

Step 

None 

Mech 

None 

8 

1-F 

No 

Yes 

465 

G-53 

39.95 

FT 

Wood 

B.S 

5-OM 

None 

2 

6H-EE 

4H 

60  AC 

Fixed 

Step 

None 

Ct 

None 

6 

2-F 

No 

Yes 

455 

G-61 

59.95 

FT 

Wood 

B,P,S 

6-OG 

None 

2 

6H-EE 

5 

70  AC 

Var 

Step 

None 

Ct 

CC 

ii 

2-F 

No 

Yes 

455 

G-55 

39.95 

CON 

Wood 

B 

5-G 

None 

2 

8-EE 

4K 

50  AC 

Fixed 

Step 

None 

Mech 

None 

8 

1-F 

No 

Yes 

465 

GD-67 

39.95 

CON 

Wood 

B 

5-GO 

1 

2 

8-PM 

2H 

45  AC-DC 

Fixed 

Step 

None 

Mech 

None 

8 

1-F 

No 

Yes 

465 

G-56 

59.95 

CON 

Wood 

B.S 

5-OM 

None 

2 

12-EE 

4H 

60  AC 

Fixed 

Step 

None 

Ct 

None 

6 

2-F 

No 

Yes 

455 

G-66 

69.95 

CON 

Wood 

B.P.S 

6-OG 

None 

2 

12-EE 

5 

70  AC 

Var 

Step 

None 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

G-85 

99.95 

CON 

Wood 

B,P,S 

8-OM 

None 

2 

12-EE 

5 

75  AC 

Var 

Step 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

G-97 

129.95 

CON 

Wood 

B.P.S 

9-OM 

None 

3 

12-EE 

5 

95  AC 

Fixed 

Step 

None 

Ct 

AFC 

6 

2-R 

No 

Yes 

465 

G-105 
Radio- 
forte 

159.95 

CON 

Wood 

B.P.S 

10-OM 

None 

3 

12-EE 

12 

125  AC 

Var 

Step 

CR 

Motor 

CC 

13 

1-R 

Yes 

Yes 

455 

175.00 

CON 

Wood 

B 

9-OM 

None 

3 

12-EE 

12 

120  AC 

Var 

Step 

None 

Motor 

CC 

13 

1-R 

Yes 

Yes 

455 

G-106 

200.00 

CON 

Wood 

B.P.S 

10-OM 

None 

3 

12-EE 

12 

135  AC 

Var 

Step 

CR 

Motor 

CC 

13 

1-R 

Yes 

Yes 

455 

GD-44 

39.95 

PC-T 

Wood 

B 

4-GO 

1 

2 

5-EE 

1.8 

55  AC-DC1 

Fixed 

None 

None 

None 

No 

TRF 

G-68 

139.95 

PCA-C    Wood 

B.P.S 

6-OG 

None 

2 

12-EE 

5 

95  AC 

Var 

Step 

None 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

G-69 

185.00 

PC-C 

Wood 

B,P,S 

6-OG 

None 

2 

12-EE 

5 

95  AC 

Var 

Step 

None 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

*AC-DC  set,  AC  phono  may 

be  operated  from  DC  by 

use  of  an 

nverter  unit. 

Hallicrafters,  Inc., 

2611  Indiana  Ave., 

Chicago,  111.- 

-"Skyrlder' 

SX16 

$99.00t 

T 

Metal 

B,P,S,U 

11-M 

None 

3 

12-PM 

13 

115  AC 

Var 

Var 

Meter 

None 

Yes 

465 

SX17 

149. 50t 

T 

Metal 

B.P.S.U 

13-M 

None 

4 

12-PM 

13 

125  AC 

Var 

Var 

Meter 

None 

Yes 

465 

SX18 

77.00t 

T 

Metal 

B,P,S,U 

9-MO 

None 

3 

8-PM 

3 

65  AC 

Fixed 

Var 

None 

None 

Yes 

465 

S19 

29.50t 

T 

Metal 

B.P.S 

5-MG 

None 

2 

5-EE 

2H 

50  AC 

Fixed 

None 

None 

None 

Yes 

455 

S20 

49.50t 

T 

Metal 

B.P.S.U 

8-MO 

None 

3 

5-EE 

3 

60  AC 

Fixed 

Var 

None 

None 

Yes 

455 

DD1 

300. 00t 

T 

Metal 

B,P,S,U 

23-MG 

None 

7 

12-PM 

10 

200  AC 

Var 

Var 

Meter 

None 

Yes 

455 

fAmateur 

net  price. 

(Continued  on  page   26) 

%  Line  voltage  dropping  resistors  of  plug-in  type,  commonly  referred  to  as  ballast  resistors  or  tubes. 


Sentinel  No.  124AT  $19.95. 
Motorola  No.   59T4  $24.95. 


Andrea  No.   14E6,  6  tubes 
Fada  No.  6A51W,  5  tubes 


Admiral  No.   129  5F. 
Emerson  BJ  214  $29.95. 


PARTS  JOBBER  HOLDS  THE  BAG 

Evils   in    radio-parts    distribution    growing    out    of 
fictitious     list-prices.     A.  M.  Hirsch  offers  remedy 


During  the  Chicago  Radio  Parts 
show  and  the  national  convention  of 
the  Radio  Parts  Distributors  Associa- 
tion, intense  interest  was  developed 
among  parts  distributors  present  by  a 
proposal  made  by  Alex  M.  Hirsch,  of 
Radio  Television  Supply  Company, 
Los  Angeles,  Calif.,  designed  to  curb 
present  price  evils  in  radio  parts  dis- 
tribution. 

So  enthusiastic  did  the  parts  jobber's 
become  over  this  plan,  that  they  ad- 
journed their  own  meeting  and  held  a 
joint  session  with  the  sales  manager's 
group,  at  which  Mr.  Hirsch  again  out- 
lined his  views.  No  record  was  made 
of  these  discussions,  but  since  return- 
ing home  Mr.  Hirsch  has  drafted  for 
Radio  Today  the  following  statement 
covering  his  remarks  at  Chicago. 

By  Alex  M.  Hirsch. 
Radio  Television  Supply  Co., 
Los  .Angeles,  Col. 

Nationally  advertised  radio  parts 
are  usually  offered  to  the  consumer 
on  a  price  basis  set  by  the  manufac- 
turer. The  so-quoted  "list  price"  is 
supposed  to  be  used  as  the  basic  fig- 
ure from  which  earnings  are  deducted 
for  the  various  steps  of  distribution. 
The  manufacturer  who  sets  the  list 
price  and  extends  discounts  against 
such  list  prices  assumes  the  responsi- 
bility for  the  sincerity  of  his  proposi- 
tion. 

However,  in  practice  he  also  proves 
that  the  prescribed  "list"  is  meaning- 
less. It  has  become  trade  practice  to 
extend  to  practically  anyone  who  can 
claim  for  himself  some  sort  of  pre- 
tense, a  discount  of  40  per  cent.  The 
manufacturers  know  this  and  admit 
the  existence  of  this  fictitious  list- 
price  by  sanctioning  mail-order  houses 
to  quote  net  prices  (list  less  40  per 
cent)  indiscriminately. 

The  radio  parts  manufacturer  who 
has  built  up  this  system  is  also  re- 
sponsible for  its  breakdown.  The  ser- 
vice dealer  who  is  supposed  to  be  the 
recipient  of  this  discount  for  his  prof- 
it in  the  set-up  of  distribution  is  left 
wholly  without  compensation. 

Parts  jobber  powerless 

The  wholesaler  who.  in  the  present 
set-up  of  distribution,  is  in  reality  a 
glorified  retailer,  is  often  called  to 
account  for  this  awkward  situation 
but  of  course  he  is  powerless  to  rem- 


edy a  condition  which  is  not  of  his 
making. 

The  so-called  "wholesaler."  too,  has 
a  serious  grievance  by  reason  of  the 
discrimination  practiced  against  the 
larger  outlets  in  favor  of  the  small 
concerns. 

The  so-called  "wholesaler"  whose 
annual  volume  does  not  exceed  $20,- 
000,  can  conduct  his  business  with  an 
overhead  expense  ranging  from  8  per 
cent  to  12  per  cent.  Those  whose  vol- 
ume does  not  exceed  $100,000,  can  ope- 
rate on  an  overhead  expense  ranging 
from  12  per  cent  to  18  per  cent.  If 
you  are  fortunate  enough  to  do  in 
excess  of  $250,000  annually,  your 
overhead  range  is  from  22  per  cent  to 
28  per  cent. 

Although  the  handling  expense  of 
the  larger  business  is  an  admitted 
saving  to  the  manufacturer;  none  of 
the  lower  costs  are  passed  on  to  the 
larger  operators.  On  the  other  hand, 
the  larger  operator  is  ready  prey  for 
the  "chiseler"  who  can  underbid  him 
by  virtue  of  his  lower  overhead. 

Lack  qualifications 

The  manufacturers  representative 
who.  as  a  contact  man  is  a  decided 
factor  in  the  chain  of  distribution, 
quite  often  gives  preference  to  his  own 
pocketbook  instead  of  serving  the  pur- 
pose for  which  he  was  intended. 

Many  instances  could  be  related 
where  manufacturer's  representatives 
have  solicited  and  sold  individuals  who 
lacked  qualifications,  capital,  and 
adequate  territory  to  justify  their  ex- 
istence as  wholesalers. 

Many  facts  could  be  related  to  jus- 
tify reform  of  some  sort  or  another. 

The  trade  abuses  before  mentioned 
could  be  eliminated  through,  the  for- 
mation of  a  strong  interwoven  na- 
tional association  consisting  of  a 
membership  of  local  associations,  all 
of  which  would  be  governed  under  the 
same  rules  of  procedure  and  code  of 
ethics. 

Self  -  imposed  regulations  should 
neither  include  price  fixing  or  any 
thought  which  could  be  construed  to 
be  discriminating  against  any  legiti- 
mate member  of  the  trade. 

The  manufacturers'  division  should 
be  open  to  any  legitimate  manufac- 
turer. The  wholesaler  division  should 
be  open  to  any  legitimate  wholesaler, 
and  the  dealers'  division  to  any  legiti- 
mate service  dealer. 


To  place  all  branches  of  the  indus- 
try in  agreement  with  an  equitable 
code  of  ethics  and  procedure,  local  as- 
sociations should  certify  to  the  legita- 
macy  of  its  members  and  confine  their 
trade  exclusively  to  the  members  of 
the  national  association. 

This  cooperative  element  would  pro- 
vide the  policing  power  so  necessary. 

At  this  time  the  plan  is  merely  a 
suggestion  and  not  as  yet  a  presenta- 
tion for  adoption,  for  the  success  of 
such  a  plan  depends  principally  on  the 
good  intentions  of  the  radio  parts 
manufacturers.  They  have,  perhaps 
not  been  told  before,  although  they 
may  all  know  it,  that  if  one  solicits 
business  on  the  basis  of  an  extended 
discount  which  does  not  exist  in  fact, 
one  is  apt  to  be  involved  in  an  order 
which  may  begin  with  the  phraseology 
"cease  and  desist." 

DISCOUNTS  GRANTED  BUT 
NOT  EARNED 

By  Blakely  E.  Cross 

Adirondack  Supply  Co..   Gloversville. 

N.  Y. 

Treasurer   National   Radio   Parts 

Distributors  Association 

Probably  the  greatest  evil  in  parts 
distribution  at  the  present  time  is  the 
granting  of  discounts  to  those  not  en- 
titled to  them  by  virtue  of  financial 
set-up,  experience,  or  capability  of 
rendering  service. 

Thus  the  manufacturer  (who  is  in 
many  cases  at  the  mercy  of  an  insuf- 
ficiently trained,  or  self-seeking  repre- 
sentative, or  who  does  it  that  way  be- 
cause he  has  the  chiseling  virus  in  his 
blood)  often  gi'ants  the  jobbing  dis- 
count to  chain  stores,  large  retailers, 
and  those  indiscriminate  outlets  which 
never  could  become  distributors,  but 
who  use  their  larger  margin  for  cut- 
price  activity  at  the  expense  of  their 
more  ethical  brethren. 

The  jobber  in  turn,  be  he  mail- 
order house  or  the  more  conventional 
type  of  order-sifter,  grants  a  discount 
to  anyone  who  makes  any  claim  at  all 
to  being  a  retailer.  In  many  cases,  no 
pretense  at  all  of  selecting  customers 
is  made,  and  all  who  appear  with  the 
requisite  amount  of  cash  or  credit, 
may  buy  at  wholesole  prices.  Some 
jobbers  carry  this  thing  not  quite  so 
far.  but  do  sell  at  retail  to  retail  cus- 
(Vontinved  on  page  37) 


22 


Radio  Todav 


New,  sales-designed  fan  blade,  with  GE  engineer  W.  K.  Skolfield. 


Improved  home  movies  get  the  benefit  of  a  Home  Screen  Contest  this  sum- 
mer. Olivia  DeHaviland  of  Warner  Bros,  is  shown  here  with  a  new  Univex. 
This  company  is  introducing  a  new  line  of  candid  cameras  at  $5.95  and  $7.50. 


SWELL  FOR  SUMMER 

Extra    lines    for    hot-weather    profits 


Smooth  -  running,      smooth  -  selling 
Samson   rubber-bladed    Saflex   elec- 
tric fan. 


The   very   name   of  "Koolroom" 
attracts  prospects  for  conditioned 


"Heat  relief"  is  the  sales  phrase  for  the  Johnson  Space  Cooler. 
Glide  Shavers,  brand  new  product  of  International  Radio  Corp. 


SOUND  SPECIALIST  SELLS 
SAFETY  SERVICE 

In  Harrisburg,  Pa.,  the  public  ad- 
dress experts  Hite  &  Hite  are  keeping 
busy  with  their  special  "Advertone 
Sound  and  Movie  Coach,"  which  they 
have  established  as  a  dramatic  means 
of  selling  safety  to  the  public.  The 
coach  uses  electrical  transcriptions 
of  actual  auto  accidents,  displays  big 
signs  on  the  subject  of  highway 
safety  and  carries  literature  for  dis- 
tribution to  crowds. 

The  coach  is  hired  by  various  agen- 
cies interested  in  safety,  by  schools 
and  by  groups  of  dealers  who  like  to 
be  identified  with  the  cause.  It  ap- 
pears at  parks  and  playgrounds,  and 
at  many  types  of  outdoor  events. 

Equipment  used  in  the  coach  is  ex- 
ceptional in  that  it  includes  movie 
projectors,  a  complete  power  plant, 
six  different  amplifiers  and  record- 
playing  equipment.  Rates  charged  by 
Hite  &  Hite  range  from  $25  per  day 
up,  depending  upon  the  number  of 
local  sponsors. 

HUSH  MONEY 

*  Plant  and  office  noises,  many  of 
which  could  be  effectively  deadened, 
cost  American  industry  about  $2,000,- 
000  per  day  in  inefficient  operation. 
Noise  caused  by  telephones,  type- 
writers, voices  and  machines  adds  as 
much  as  10  per  cent  to  the  nation's 
payroll,  according  to  figures  pre- 
sented by  Celotex  engineers. 

With  modern  acoustical  materials, 
noises  ordinarily  taken  for  granted  as 
inevitable  accompaniments  of  work, 
can  be  so  quieted  that  they  no  longer 
cause  excessive  employee  fatigue, 
nervous  strain,  and  increased  errors. 


More  sales  chances  for 
outdoor    public    address 

Actual  tests  made  after  installation 
of  acoustical  tile  showed  a  29  per 
cent  reduction  of  typists'  errors  and 
a  52  per  cent  reduction  in  mistakes 
made  by  machine  operators.  "Sound- 
conditioning"  resulted  in  an  8.8  per 
cent  increase  in  production  in  the 
offices  of  the  Aetna  Life  Insurance 
Company. 

Because  of  such  savings  through 
greater  efficiency  acoustical  treatment 
has  in  many  cases  paid  for  itself 
within  twelve  months,  and  after  that 
it  pays  a  yearly  dividend  in  improved 
efficiency  and  operation. 

DECIBEL  FANS  ALSO  MUST 
LEARN  ABOUT  "PHONS" 

*  Now  that  everybody  is  begin- 
ning to  get  acquainted  with  the  sci- 
entists' noise  units  of  decibels,  ex- 
perts propose  to  start  new  units  called 
phons,  reports  Dr.  E.  E.  Free,  con- 
sulting sound  engineer,  New  York 
City. 

Their  reason  is  not  any  perverse 
desire  to  make  things  difficult,  but  is 
a  natural  peculiarity  of  human  ears. 
The  decibel  units  already  familiar 
give  the  intensity  of  a  sound  in  terms 
of  physical  energy,  like  the  energy  of 
electricity,  heat  or  anything  else.  If 
human  ears  were  as  simple  as  the 
scientists  would  like,  they  would  re- 
spond to  this  straightforward  energy 


lfinaIinn,lJros.mfarntnft-3pvi , 


When  the  circus  rolls  into  town,  alert  PA  men  are  on  hand  with  a  bill  of  goods. 
Soundman  Kirk  Fritz,  Brooklyn,  N.  Y.,  did  the  job  here  with  Atlas  equipment. 

24 


scale  and  no  noise  units  except  deci- 
bels would  be  necessary.  Real  ears, 
however,  have  a  complicated  response 
according  to  which  sounds  having  the 
same  amount  of  energy  but  with  dif- 
ferent pitches  or  other  characteristica 
do  not  always  sound  equally  loud.  To 
meet  this  situation  an  international 
congress  of  acoustic  experts  recently 
called  in  Paris  adopted  the  second 
unit  of  the  phon  as  measuring  loud- 
ness heard  by  average  human  ears. 
Decibels  still  will  be  used  to  express 
a  sound's  intensity  or  physical  energy. 
The  phons  will  refer  only  to  degrees 
of  loudness  and  probably  will  be  used 
to  measure  such  things  as  city  noises 
or  the  noises  of  machinery  to  be  used 
in  households.  The  old  puzzle  of 
whether  a  tree  that  falls  in  the 
primeval  forest  makes  a  sound  now 
can  be  answered.  It  will  produce  the 
usual  number  of  decibels,  but  if  there 
is  no  one  there  to  hear  it  there  will 
be  no  phons. 

NO  GROUP  TOO  SMALL- 

A  decision  recently  handed  down 
by  the  Court  of  Errors  and  Appeals 
of  the  state  of  New  Jersey  has  con- 
siderable significance  for  sound  men. 
The  opinion  was  that  the  use  of  a 
sound  truck  to  announce  the  exist- 
ence of  a  strike  is  permissible.  The 
use  of  the  word  "scab"  through  the 
amplifiers  was  ruled  out,  but  the 
sound  equipment  itself  can  still  be  an 
element  in  the  situation. 

In  these  days  of  labor  difficulties 
and  lively  activity  on  the  part  of  vari- 
ous unions,  the  labor  leaders  may  rep- 
resent an  important  set  of  prospects 
for  the  owners  of  sound  trucks. 

PA  APPLICATIONS  GALORE 

Many  new  uses  for  sound  equip- 
ment showed  up  during  the  recent 
tour  of  RCA's  "Sound  Pullman,"  the 
special  railway  car  which  went  7,000 
miles  and  exhibited  $50,000  worth  of 
sound  products  in  24  key  cities. 

Railway  officials  saw  possibilities  in 
the  use  of  PA  in  railroad  yards  for 
signalling  during  heavy  fogs.  Edu- 
cators and  police  heads  decided  that 
recording  equipment  had  a  big  place 
in  voice  training  and  court  work. 
Clergymen  were  interested  in  amplifi- 
cation of  church  chimes. 

The  stunt  netted  the  sound  industry 
a  mass  of  publicity,  as  governors, 
mayors  and  assorted  other  celebrities 
visited  the  car.  RCA  Commercial 
Sound  Section  manager  W.  L.  Roth- 
enberger  now  believes  the  amplifica- 
tion business  to  be  a  well  established, 
major  source  of  profit  for  radio  men. 


Radio  Today 


ANDREA  PRESENTS 

Ike  feature  Phone  -  Radio  L.ine 


MODEL  6-E-6:  Phono  -  radio  features 
Andrea  type  sloping  dial.  MODEL  4-E-6 
console  has  top  compartment  where  turn- 
table and  pick-up  can  be  installed  subse- 
quently. AC  or  AC-DC  models  available. 
H.    34%    ins.,    W.    21   ins.,   D.    17   ins. 


1939 


F.  A.  D.  ANDREA  re-enters  the 
domestic  radio  field  with  a  line 
of  typical  Andrea  quality  and  America's  most 
beautiful   cabinets  in  table   models  and   consoles. 


A  line  that  radio  buyers  will 
go  for!  It  has  everything!  Mar- 
velous tone  quality,  "Climate 
Sealed"  construction,  instantan- 
eous, automatic  Push-a-Button 
tuning  .  .  .  plus  beauty  and  new 
convenience  features  that  SELL 
THEMSELVES. 

Note  Model  6-E-6  at  left — moderately  priced  and 
greatly  admired  for  its  beauty.  By  clever  design- 
ing, the  radio  controls  and  the  dial,  are  kept 
conveniently  high  on  cabinet.  Available  with 
or  without  turntable  installed. 

Model  8-E-n  at  left  —  Andrea  "Disappearing 
Turntable"  is  in  a  drawer  in  the  front.  No  need  to 
disturb  anything  on  the  top  of  the  cabinet  to  use 
the  phonograph.  Simply  open  the  drawer,  put  on 
the  record  and  close  the  drawer.  The  radio  con- 
trols are  high  on  the  cabinet  in  easy  view — no 
bending  over.  Console  has  drawer  for  turntable, 
which  can  be  installed  at  a  later  time  as  desired. 

Model  io-E-n  Lowboy  deluxe,  automatic 
phono-radio  with  automatic  record  changer  at 
left  below,  is  unsurpassed  as  a  musical  instru- 
ment. In  cabinet  beauty  and  tone  quality,  it  is 
the  perfect  answer  for  the  purchaser  who  wants 
the  very  best  that  can  be  obtained. 

At  left:  MODEL  8-E-ll:  Startling  inno- 
vation! Phono-radio  with  "Andrea  Dis- 
appearing Turntable" — beautiful,  conven- 
ient, original — the  feature  combination  of 
1939.  Available  for  AC  or  AC-DC.  8  or 
11  tubes  AC,  12  tubes  AC-DC.  H.  40  Yt 
ins.,  W.  26  ins.,  D.   15%  ins. 


At  right:  MODEL  2-E-6:  Most  admired 
among  all  1939  table  models  is  this  dis- 
tinctive Andrea  6-tube,  3-band  receiver 
available  for  AC  or  AC-DC.  H.  10%  ins., 
W.   17%  ins.,  D.  9%  ins. 


At  left:  MODEL  10-E-ll  .  .  .  automatic 
combination,  with  11-tube  AC  chassis. 
Also  available  with  8-tube  AC  or  12-tube 
AC-DC  chassis.  "Talking  Lights"  on  dial. 
12  in.  speaker  with  oversize  field  coil. 
H.   31   Ins.,  W.  36y2   ins.,  D.   17y2   ins. 


PuJi-A-Buttofo 


Junmg, 


AUTOMATIC 

Instantaneous  and  Trouble-free 

Climate  Sealed 

Tested  from  Equatorial  Africa  to  the  far 
North.  Impervious  to  temperature  changes, 
humidity  and  salt  water  dampness. 

THERE'S  MORE  MONEY  IN 
RADIO    WITH    THE    ANDREA    LINE 

"To  produce  a  fine  radio  receiver  is  only  part 
of  the  obligation  of  a  manufacturer,  as  I  see  it. 
Equally  important  is  the  obligation  to  so  con- 
duct the  business  that  it  is  profitable  to  jobber  and 
dealer.  Much  of  the  success  of  my  former  com- 
pany—F.  A.  D.  ANDREA,  INC.— while  under 
my  ownership  and  management,  was  due  to  my 
recognition  of  this  vital  principle.  The  same 
sound  policies  will  prevail  with  Andrea  Radio 
Corp.  You'll  find  it  literally  true  rhat  'There's 
more  monev  in  radio  with  the  Andrea  line'." 
F.  A.  D.  ANDREA 

Also  a  complete  line  oj  Lible  models  oj 
which   Model  2-E-6   below   is  typical. 


Jobbers  and  dealers,  don't  delay.  Phone,  wire  or  write  for  full  details  today.  Address 
ANDREA    RADIO    CORP.,   4820-48th  Avenue,  Woodside,  LonS  Island,  N.  y. 


July,   1938 


25 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS— Compiled  by  Radio  Today 


Model 
No. 


List 

price 


Style       Material 


Wave- 
bands 


Number 
tubes 

(RMA 
defiiO 


Plug-  Cond. 
in     gang     Spkr. 
re-       sec-    size  & 
sistor%  tions  type 


Automatic  Tuning 


Watts 

Power 

Vis- 

audio 

Supply 

Tone 

ual 

power 

and 

Selec-  con- 

tun- 

(Mas.l 

watts 

tivity     trol 

ing 

Type 

Re- 

-  mote 


Drift  Adjust-  con-  I.F. 

Comp.   No.   ments    trol    AVC      Peak 


Harris  Mfg.  Co.,  2422  W.  7th  St.,  Los  Angeles,  Calif.— "Harris  Electone" 

Specifications  same  as  last  year — please  refer  to  Part  II  of  the  June  1937  issue. 

Halson  Radio  &  Television,  Inc.,  Cambridge  &  Tremont  Sts.,  Meriden,  Conn. — "Halson" 


A-S 
B-5 
C-6 

MS6 
10 

S15.00 
17.50 
25.00 
20.00 
34.50 

MT 
MT 
FT 
MT 
FT 

Fiberloon 

Wood 

Wood 

Fiberloon 

Wood 

B 
B 
B 
B 
B.S 

4-o 

4-o 

5-GO 

5-o 

5-G 

1 
1 

1 
1 
1 

2 
2 
2 
2 
2 

4 
5 
5 
4 
6 

2 

2 
2 
2 
2.2 

45  AC-DC 
45  AC-DC 
60  AC-DC 
60  AC-DC 
60  AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
Step 

None 
None 
None 
None 
None 

None 
None 
None 
None 
None 

No 

No 

.     Yes 

Yes 

Yes 

TRF 

TRF 

456 

456 

456 

20 
30 

40 

12B 

•Optional- 

39.50       FT           Wood           B.Si.S              6-G 
49.50       FT           Wood           B.Si.S              6-GO 
59.50       FT           Wood           B.Si.S              8-GM 
49.50       CON        Wood           B.Si                  6-GO 
—not  supplied  with  standard  models  unless  requested. 

None 

1 
None 

1 

2 

2 
2 
2 

6 
6 
8 
8 

3.4 
2V2 
6 
2.2 

65  AC 

80  AC-DC 

90  AC 

65  AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
Step 
Step 

CR# 
CR* 
CRf 
CR# 

Ct#         cc 
Ct#         cc 
at       cc 
Ctf        cc 

6       2-R        No 
6       2-R        No 
6       2-R         No 
6       2-R         No 

Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 

Howard  Radio  Co. 

1735  Belmont  St..  Chicago,  111. 

— "Howard 

200 
220 
270 
375 
46S 

NS 
NS 
NS 
NS 
NS 

MT 
MT 
FT 
FT 
FT 

Metal 
Meta! 
Wood 
Wood 
Wrood 

B 

B 

B 

B.P.S 

B,P,S 

4-Mo 

5-G 

5-G 

7-OM 
7-OM 

None 
None 
None 
None 
None 

2 
2 
2 
2 
3 

3-EE 

5-EE 

6J4-EE 

6M-EE 

8-EE 

13-3 

2 

2 

434 

434 

45  AC-DC 

50  AC 
50  AC 
65  AC 
70  AC 

None 

None 

Var 

Var 

Var 

None 

None 

None 

CR 

CR 

None        

Mech       None 
Mech       None 
It              None 
It              None 

'i'      i-R         No 
4       1-R         No 
6       1-F         No 
6       1-F         No 

No 
Yes 
Yes 
Yes 
Yes 

TRF 

465 
465 
465 
465 

318D 
418 
325D 
525 

NS 
NS 
NS 
NS 

CON 

CON 
CON 
CON 

Wood 
Wood 
Wood 
Wood 

B,P,S 
B.P.S 
B.P.S 
B.P.S 

7-OM 
11 -OM 
7-OM 
12-OM 

None 
None 
None 
None 

3 
3 
3 

12-EE 
12-EE 
12-EE 
15-EE 

4H 
9 

434 
15 

70  AC 
95  AC 
70  AC 
105  AC 

Var 
Var 
Var 

Var 

CR 
CR 
CR 

CR 

It              None 
It              None 
It              None 
It              None 

6       1-F         No 
6       1-F         No 
6       1-F         No 
6       1-F        No 

Yes 
Yes 
Yes 
Yes 

465 
465 
465 
465 
f    4651 
\ 15601 

480 

NS 

CON 

Wood 

B,P,S,U 

17 

None 

3 

15  PM 

15 

180  AC 

Var 

Meter 

None 

Yes 

450A 

NS 

FT 

Metal 

B.P.S.U 

12-OM 

None 

3 

8-PM 

934 

120  AC 

Var 

Meter 

None 

Yes 

f465  1 
11560/ 

440 
430 

NS 
NS 

FT 
FT 

Metal 
Metal 

B.P.S.U 
B,P,S,U 

9-OM 
6-OM 

None 
None 

3 

2 

8-PM 
6-EE 

2 

95  AC 
60  AC 

Var 
None 

Meter 
Meter 

None 
None 

Yes 
Yes 

465 
465 

International  Radio  Corp. 

Arm  Arbor,  Mich.  Information  not  available 

up  to  July  15. 

See  August 

issue  of  RADIO  TODAY. 

Laurehk  Radio  Mfg.  Co.,  E 

.  Michigan  St.,  Adrian 

Mich., — "Laurehk 

',  "Laurette", 

"Musique" 

L-500 
L-A09 

S155.00 
129.50 

CON 
CON 

Wood 
Wood 

B.P.S.U.W      12-MO 
B.P.S.U           9-MO 

None 
None 

3 
3 

12-EE 
12-EE 

15 

AC 

AC 

Var 
Var 

Var 
Var 

CR 

None 

1 1              None 
It              None 

7       3-R         No 
7       3-R         No 

Yes 
Yes 

458 
458 

Noblitt-Sparks  Industries, 

Columbus, 

'nd. — "Arvin" 

58 

58A 

68 

78 

88 

S 16.95 
19.95 
24.95 
29.95 
39.95 

FT 
FT 
FT 
FT 
PC-T 

Plastic 
Plastic 
Plastic 
Wood 
Wood 

B 
B 
B 
B 
B 

5-OM 
5-OM 
5-OM 
5-OM 
5-OM 

1 

1 
None 
None 

1 

2 
2 
2 
2 
2 

5-EE 
5-EE 
5-EE 
5-EE 

6-EE 

2 
2 
2M 

234 

40  AC-DC 
40  AC-DC 
40  AC 
40  AC 
40  AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
Step 
Step 
None 

None 
None 
None 
None 
None 

None        

None        

Ct            Yes 
Mech       None 
None        

6       2-'f"       No 
6       1-F        No 

Yes 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 
455 

518 

618 

628CS 

638CS 

628 

18.95 
29.95 
54.95 
49.95 
44.95 

T 
FT 
CS 
CS 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B,P 
B,S 
B.S 
B.S 
B.S 

5-G 
6-0 
6-0 
6-0 
6-0 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

5-EE 
6-EE 
8-EE 
8-EE 
8-EE 

334 
334 
334 
334 
334 

60  AC 
70  AC 
70  AC 
70  AC 
70  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Var 
Var 
Var 
Var 

None 

CR 

CR 

CR 

CR 

None 
None 
None 
None 
None 

Yes 
Yes 
Yes 
Tes 
Yes 

455 
455 
455 
455 
455 

638 
818 
828A 
838CS 

848CS 

49.95 
49.95 
69.95 
69.95 
99.95 

CON 

FT 

CON 

CS 

PC-CS 

Wood 
Wood 
Wood 
Wood 
Wood 

B.S 

B.P.S 

B.P.S 

B.P.S 

B.P.S 

6-0 
8-0 
8-0 
8-0 

8-0 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

8-EE 

8-EE 

10-EE 

10-EE 

10-EE 

334 

5 

5 

5 

5 

70  AC 
90  AC 
90  AC 
90  AC 
90  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 

Var 

CR 
CR 
CR 
CR 
CR 

None 
None 
None 
None 
None 

Yes 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 
455 

828AT 
838AT 
528CS 
1237D 

74.95 
79.95 
29.95 
89.95 

CON 
CON 
CS 
CON 

Wood 
Wood 
Wood 
Wood 

B.P.S 
B.P.S 
B,Pj 
B.P.S 

8-0 
8-0 
5-G 
12-0 

None 
None 
None 
None 

2 

9 

2 
3 

10-EE 
12-EE 
6-E 
12-EE 

5 
5 

334 
16 

90  AC 
90  AC 
60  AC 
175  AC 

Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Step 
Var 

CR 
CR 

None 
CR 

None        

None       

None        

Ct             AFC 

6'     3-R        No 

Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 

1247D 
1247A 
1247X 
1237X 
1427 

119.50 
129.50 
99.95 
79.95 
139.50 

CON 
CON 
CON 
CON 
CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B.P.S 
B.P.S 
B.P.S 
B,P,S 
B,P,S 

12-0 
12-0 
12-0 
12-0 
14-0 

None 
None 
None 
None 
None 

li 

3 
3 

Two   I 

8-EE  \ 

12-EE 

12-EE 

16 
16 
16 
16 
30 

175  AC 
175  AC 
175  AC 
175  AC 
240  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

CR 
CR 
CR 
CR 

CR 

Ct            AFC 
Ct            AFC 
None       AFC    . 
None       AFC 
Ct            AFC 

6      3-R        No 
6       3-R         No 

l6'      3-R        No 

Yes 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
■155 
455 

Pacific  Radio  Corp. 

,  5016  S. 

Main  St.,  I 

.os  Angeles 

Calif. — "Pacific  Crusader" 

37 

37A 

37T 

37AT 

18 

S22.95 
29.95 
31 .95 
39.95 
10.95 

FT 
FT 
CS 
CS 

MT 

Wood 
Wood 
Wood 
Wood 
Wood 

B,P 

B,P 
B,P 
B,P 
B 

5-G 

5-G 

5-G 

4-oG 

5-G 

None 
None 
None 
None 
None 

2 

2 
2 
2 

5-EE 
5-EE 
5-EE 
5-EE 
3-EE 

3 
3 
3 

13i 

38  AC 
38  AC 
38  AC 
38  AC 
26  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
Step 
Step 
None 

None 
None 
None 
None 
None 

None        

Ct             None 

None        

Ct             None 
None        

6       2-R'       No 
'6'     2-R'       No 

Yes 
Yes 
Yes 
Yes 

No 

456 
456 
456 
456 
TRF 

28 

57 

57T 

57C 

57X 

19.95 
31.95 
49.95 
55.00 
55.00 

FT 

FT 

CS 

CON 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B 

B,P,S 
B.P.S 
B.P.S 
B.P.S 

6-G 
6-G 
6-G 
6-G 
6-G 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

5-EE 
6-EE 
6-EE 
8-EE 
12-EE 

3 
3 
3 
3 
3 

35  AC 
42  AC 
42  AC 
42  AC 
42  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
Step 
Step 
Step 

None 

CR 

CR 

CR 

CR 

None 
None 
None 

None 
None 

Yes 
Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 
456 

57A 
57  AN 
27 
37P 
57P 

39.95 
64.95 
12.95 
49.95 
59.95 

FT 

CON 

FT 

PC-T 

PC-T 

Wood 
Wood 
Wood 
Wood 
Wood 

B.P.S 

B,P,S 

B 

B,P 

B,P,S 

6-G 

7-GO 

4-G 

5-G 

6-G 

None 
None 

1 
None 
None 

2 
2 
2 
2 
2 

6-EE 

12-EE 

5-EE 

5-EE 

6-EE 

3 
3 
3 
3 

42  AC 
50  AC 
42  AC-DC 
38  AC 
42  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
None 
Step 
Step 

CR 
CR 

None 
None 
CR 

Ct            None 

None        

None        

None        

None        

6       2-R        None   Yes 

Yes 

No 

Yes 

Yes 

456 

456 

TRF 

456 

456 

fhilco  Radio  &  Television  Corp.,  Tioga  &  C  Sts., 

Philadelphia 

,  Pa.—" 

Philco" 

39-12 
39-14 
39-15 
39-17 
39-17 

S20.00 
25.00 
25.00 
39.95 
29.95 

T 
T 

T 

CON 

T 

Plastic 

Plastic 

Plastic 

Wood 

Wood 

B 

B,Si 

B.S 

B 

B 

5-0 
5-0 
5-0 
5-0 
5-0 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

5-EE 
5-EE 
5-EE 
8-EE 
5-EE 

NS 
NS 
NS 
NS 
NS 

40  AC 
55  AC-DC 

40  AC 
40  AC 
40  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
None 

None 
None 
None 
None 
None 

None        

None        

None        

Mech       NS 
Mech       NS 

6       i-F'       No 
6       1-F         No 

Yes 
Yes 
Yes 
Yes 

Yes 

470 
470 
470 
470 

470 

39-18 
39-18 
39-19 
39-19 
39-25 

39.95 
29.95 
49.95 
35.00 
59.95 

CON 

T 

CON 

T 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B 
B 
B.S 

B.S 
B.S 

5-0 
5-0 
5-0 
5-0 
5-0 

1 

1 
None 
None 
None 

2 
2 
2 
2 
2 

8-EE 
5-EE 
8-EE 
5-EE 
10-EE 

NS 
NS 
NS 
NS 
NS 

55  AC-DC 
55  AC-DC 

40  AC 
40  AC 
45  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
Step 

None 
None 
None 
None 
None 

Mech       NS 
Mech       NS 
Mech       NS 
Mech       NS 
C&It       NS 

6       1-F         No 
6       1-F         No 
6       1-F         No 
6       1-F         No 
8       2-R         No 

Yes 
Yes 
Yes 
Yes 
Yes 

470 
470 
470 
470 
470 

39-25 
39-30 
39-40 
39-45 
39-35 

45.00 
55.00 
100.00 
129.50 
79.50 

FT 

FT 

CON 

CON 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B,S 

B.S 

B.S 

B.P.S 

B,S 

5-0 
6-0 
8-0 
9-0 
6-0 

None 
None 
None 
None 
None 

2 
2 
3 
3 
2 

63^-EE 
6M-EE 
12-EE 
12-EE 
12-EE 

NS 
NS 
NS 
NS 
NS 

45  AC 
45   AC 
80  AC 
85  AC 
45  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
Var 
Var 
Step 

None 
None 
None 
None 
None 

C&It       NS 
C&It       NS 
C&It       NS 
C&It       NS 
C&It       NS 

8       2-R        No 
8       2-R        No 
8      2-R       No 
8      2-R        No 

8      2-R        No 

Yes 
Yes 
Yes 
Yes 
Yes 

470 
470 
470 
470 
470 

Pierce  Airo  Inc.,  440  Lafayette  St.,  New  York,  N.  Y. — "De  Wald" 

530-W 

530-1 

534 

533 

633S 

$14.95 
17.25 
15.95 
16.95 
23.50 

T 
T 
T 
T 

T 

Plastic 
Plastic 
Wood 
Wood 
Wood 

B 

B 
B 
B 
B 

4-GO 
4-GO 
4-GO 
4-GO 
5-GO 

2 
2 
2 
2 
2 

5-EE 
5-EE 
5-EE 
5-EE 
5-EE 

2 
2 
2 
2 
2 

48  AC-DC 
48  AC-DC 
48  AC-DC 
48  AC-DC 
48  AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
None 

None 
None 
None 
None 
None 

None 
None 
None 
None 

None 

No 
No 
No 
No 
Yes 

TRF 
TRF 
TRF 

456 

456 

(Continued  on  page  28) 

%  Line  voltage  dropping  resistors  of  plug 

in  type,  commonly  referred  to  as 

ballast  resistors 

or  tubes. 

26 


Index  to  codes  on  pages  16  and  34 


Radio  Today 


releases  the  2nd  sensation 

of  their  startling  1939  radio  line 


CROSLEY  RADIO  PLANS 
for  1939  EXCITE  INDUSTRY 

The  "Vanity",  a  Crosley  push- 
button radio  at  89.99  is  already 
proving  a  startling  sales  maker,  as 
indicated  in  dealers  orders  and  re- 
orders and  the  rush  at  the  factory. 
Accurate  tuning — both  push  but- 
ton and  knob;  beautiful  brown 
moulded  cabinet — excellent  tone. 


The  "Vanity  de 
Luxe"  in  old  ivory 
plaskon  moulded 
cabinet — 4  work- 
ing tubes  including 
beam  power  tube 
is  another  "best 
seller"   at  $12.99. 


Don't  Wait!  Act  Now!  Be  early  to  show 
and  you'll  be  first  to  sell.  Send  us  the  coupon. 
Be  first  with  this  sure  profit  maker  of  1939. 


r 


THE  CROSLEY  RADIO  CORPORATION 


POWEL  CROSLEY,  Jr.,  President 

Home  of  "the  Nation's  Station' 


CINCINNATI 
-WLW— 70  on  your  dial 


Magnificent!  This  will  be  your  comment  when 
you  hook  up  this  newly  designed  radio  for  trial — 
when  you  find  the  positive  clear  cut  action  of 
the  push  button  tuning — when  you  explore  the 
easy  tuning  of  the  knob  control — when  you  hear 
the  fine  tone  so  free  from  distortion — when  you 
discover  the  amazing  true  volume  the  set  delivers. 
We  had  a  sensation  in  the  "FIVER"  at  this 
price.  We  present  a  SMASH  HIT  in  this 
"SIXER"  AC  Superheterodyne  broadcast  and 
shortwave — 5"  dynamic  speaker  in  a  moulded 
cabinet  of  great   beauty   and   acoustic  excellence. 

Prices  slightly  higher  in  Soulh  and  West. 

The  Crosley  Radio  Corporation 
Cincinnati,  Ohio. 

I  am  mailing  this  coupon  as  the  quickest  way  to  see — 
1  to  hear — and  to  know  the  new  "SIXER".  Please 
i!  have  the  distributor's  salesman  call  on  me  PRONTO ! 
■  RT— 738 

•       Name 

'        Address 

I 

|       City Stale 


July,   ]938 


27 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS— Compiled  by  Radio  Today 


Number 

Plug-  Cond. 

Watts 

Power 

Vis- 

Automatic Tuning 

Stations 

Re- 

Cabinet 

tubes 

in     gang     Spkr. 

audio 

Supply 

Tone 

ual 

mote 

List 

price 

power 

(Max.! 

Selec- 

tun- 

Drift               Adjust 

■  con- 

I.F. 

No. 

Style       Material 

bands 

defin.*) 

sistor%  tions  type 

watts 

tivity 

trol 

ing 

Type 

Comp.  No.   ments 

trol    AVC 

Peak 

Pierce 

645 

26.50 

T              Wood 

B,S 

5-GO 

1              2       5-EE 

2Ji 

48  AC-DC 

Fixed 

None 

None 

None 

....     Yes 

456 

701 

32.95 

T              Wood 

B 

5-GO 

2             2       5-EE 

2% 

50  AC-DC 

Fixed 

Step 

None 

Ct 

CC          6      2-R 

No       Yes 

456 

648 

32.95 

T              Wood 

B.S 

6-GO 

1             2       6.1.0 -EE 

2X 

50  AC-DC 

Fixed 

Var 

None 

Mech 

None       6       6-F 

No       Yas 

456 

650 

34.95 

T              Wood 

B.Si.S 

6-GO 

1             2       6M-EE 

2H 

50  AC-DC 

Fixed 

Var 

None 

Mech 

None        6       6-F 

No       Yes 

456 

652 

36.50 

T              Wood 

B.Si.S 

5-GO 

1             2       5-EE 

2H 

48  AC-DC 

Fixed 

Var 

None 

None 

Yes 

456 

1104 

1105 

529 

649 

651 


65.50 
77.95 
26.50 
34.95 
36.95 


Chassis 

VT 

T 

T 

T 


onlv 
Wood 
Wood 
Wood 
Wood 


B.P.S 

B.P.S.W 

B 

B.S 

B.Si.S 


9-MO 

9-MO 

5-G 

6-GO 

6-GO 


2 

2 
None 
None 
None 


10-EE 

10-EE 

5-EE 

6M-EE 

6M-EE 


90  AC-DC 
90  AC-DC 
42  AC 
45  AC 
45  AC 


Fixed 
Fixed 

Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

None  None 

Var  None 

Var  None 


None 
None 
None 
Mech 
Mech 


None       6 
None       6 


1-F 
1-F 


No 

No 


Yes 
Yes 
Yes 
Yes 
Yes 


1002 

65.50 

B.P.S 

10-MG 

None 

3 

10-EE 

15 

85  AC 

Fixed 

Var 

CR 

None 

Yes 

456 

1002B 

77.95 

VT 

Wood 

B.P.S 

10-MG 

None 

« 

10-EE 

15 

85  AC 

Fixed 

Var 

CR 

None 

Yes 

456 

1003B 

81.95 

VT 

Wood 

B.P.S.W 

10-MG 

None 

3 

10-EE 

15 

85  AC 

Fixed 

Var 

CR 

None 

Yes 

456 

531 

39.95 

PC-T 

Wood 

B 

4-GO 

1 

2 

5-EE 

2 

58  AC-DC 

Fixed 

None 

None 

None 

No 

TRF 

532 

49.95 

PC-T 

Wood 

B 

6-OG 

2 

2 

5-EE 

2 

65  AC-DC 

Fixed 

None 

None 

None 

No 

TRF 

536 

42.50 

PC-T 

Wood 

B 

4-GO 

1 

2 

5-EE 

2 

58  AC 

Fixed 

None 

None 

None 

No 

456 

537 

52.50 

PC-T 

Wood 

B 

4-GO 

1 

2 

5-EE 

2 

69  AC-DC 

Fixed 

None 

None 

None 

No 

456 

808C 

61.50 

CON 

Wood 

B,  Si 

7-GO 

1 

2 

14-EE 

2H 

50  AC-DC 

Fixed 

Step 

CR 

Mech       None       6      2-R        No       Yes 

456 

1200C 

59.95 

CON 

Wood 

B,  Si 

8-GO 

4 

2 

14-EE 

2y2 

50  AC-DC 

Fixed 

Var 

None 

None 

Yes 

456 

1300C 

61.50 

CON 

Wood 

B.Si 

9-GO 

4 

2 

14-EE 

2H 

50  AC-DC 

Fixed 

Var 

CR 

None 

Yes 

456 

643 

36.95 

FT 

Wood 

B.S 

6-OG 

None 

2 

6^-EE 

5 

65  AC 

Fixed 

None 

CR 

None 

Yes 

456 

642 

36.50 

FT 

Wood 

B,S 

6-GO 

1 

2 

6^-EE 

2Yi 

50  AC-DC 

Fixed 

None 

CR 

None 

Yes 

456 

637 

36.50 

FT 

Wood 

B.S 

6-GO 

1 

2 

.  6M-EE 

2% 

50  AC-DC 

Fixed 

None 

CR 

None 

Yes 

456 

636 

36.95 

FT 

Wood 

B.S 

6-OG 

None 

2 

6^-EE 

5 

65  AC 

Fixed 

None 

CR 

None 

Yes 

456 

Plerson-De  Lane, 

Inc.,  2345  W.  Washington  Blvd. 

Los  Angeles 

Calif.- 

—"Plerson-De  Lane" 

PD-88          $155.00 

CON        Wood 

B 

8-MO 

None 

None     12-EE 

8 

95  AC 

Fixed 

Var 

None 

C&It 

CC 

20      3-R        No       Yes 

465 

PR-15M        222.50 

FT          Metal 

B.P.S.U 

15-MO 

None 

4       12-EE 

12 

125  AC 

Fixed 

Var 

Meter 

None 

Yes 

465 

PR-15R         222.50 

FT          Metal 

B.P.S.U 

15-MO 

None 

4       12-EE 

12 

125  AC 

Fixed 

Var 

Meter 

None 

Yes 

465 

PR-15X        222.50 

Chassis  only 

B.P.S.U 

15-MO 

None 

4       12-EE 

12 

125  AC 

Fixed 

Var 

Meter 

None 

Yes 

465 

PR-15C         335.00 

CON        Wood 

B.P.S.U 

15-MO 

None 

4       12-EE 

24 

150  AC 

Var 

Var 

Meter 

None 

Yes 

465 

PR-15UH      143.50 

FT           Metal 

U 

14-MO 

None 

4       12-EE 

12 

125  AC 

Fixed 

Var 

Meter 

None 

Yes 

465 

Pilot  Rad 

o  Corp., 

37-06  36th  St..  Long  Island  City, 

N.  Y.— .' 

Pilot  Radio" 

WH-141 

$19.90 

VT 

Plastic 

B 

4-GO 

1 

2 

5-EE 

2 

AC-DC 

Fixed 

Step 

None 

None       

•:.. 

455 

TH-151 

26.50 

FT 

Wood 

B 

5-GM 

1 

2 

5-EE 

2^ 

AC-DC 

Fixed 

Step 

None 

None        

...     Yes 

455 

TH-651 

26.54 

FT 

Wood 

B 

5-G 

None 

2 

5-EE 

3M 

AC 

Fixed 

Step 

None 

None        

...     Yes 

455 

TG-462 

32.90 

FT 

Wood 

B.S 

5-GM 

1 

2 

5-EE 

2H 

AC-DC 

Fixed 

Step 

None 

None        

...     Yes 

455 

WG-352 

37.50 

FT 

Plastic 

B.S 

5-GM 

1 

2 

5-EE 

2H 

AC-DC 

Fixed 

Step 

None 

None        

...     Yes 

455 

VG-352 

42.50 

FT 

Plastic 

B,S 

5-GM 

1 

2 

5-EE 

2Y2 

AC-DC 

Fixed 

Step 

None 

None        

...     Yes 

455 

TH-372 

42.50 

FT 

Wood 

B.S 

NS 

1 

2 

6-EE 

2V2 

AC-DC 

Fixed 

Step 

CR 

None        

...     Yes 

455 

TH-762 

42.50 

FT 

Wood 

B.S 

NS 

None 

2 

6-EE 

3H 

AC 

Fixed 

Step 

CR 

None        

...     Yes 

455 

TH-454 

56.50 

FT 

Wood 

B.Si.S 

5-MO 

1 

•?. 

8-EE 

2M 

AC-DC 

Fixed 

Var 

None 

None        

...     Yes 

455 

TH-554 

56.50 

FT 

Wood 

B.Si.S 

5-OM 

None 

2 

8-EE 

AC 

Fixed 

Var 

None 

None        

...     Yes 

455 

TH-474 
TH-664 
TG-184 
XG-184 
TG-584 


66.50 
66.50 
67.50 
67.50 
69.50 


FT 
FT 
FT 
FT 
VT 


Wood 
Wood 
Wood 
Wood 
Wood 


B.Si.S 
B.Si.S 
B.P.S 
B.P.S 
B.P.S 


6-MO 
6-OM 
7-MO 
7-MO 
8-0 


1 
None 

1 

1 
None 


8-EE 
8-EE 
8-EE 


2y2 

5 

2H 
2V2 
6 


AC-DC 

AC 

AC-DC 

AC-DC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

Var  CR 

Var  CR 


Mech 
Mech 
None 
None 
None 


Yes 

Yes 


1-F 
1-F 


No  Yes 
No  Yes 
.  Yes 
Yes 
Yes 


TG-674 
XG-674 
TH-484 
TH-874 
HX-304 


69.50 
69.50 
79.50 
79.50 
99.50 


FT 
VT 
FT 
FT 
FT 


Wood 
Wood 
Wood 
Wood 
Wood 


B.P.S 
B.P.S 
B.Si.S 
B.Si.S 
B.P.S 


7-MO 
7-MO 
7-MO 
7-MO 
11-M 


None 
None 

1 
None 

1 


2 

5.8 

6 


AC 

AC 

AC-DC 

AC 

AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

Var  CR 

Var  CR 


None 
None 
Mech 
Mech 
None 


Yes 
Yes 


1-F 
1-F 


Yes 
Yes 
No  Yes 
No  Yes 
Yes 


T< ,  508 

104.50 

FT 

Wood 

B.P.S.U 

10-MO 

None 

3 

10 

10 

AC 

Fixed 

Var 

CR 

None 

Yes 

455 

TH-594 

112.50 

FT 

Wood 

B.Si.S 

9-MO 

None 

3 

8 

5.8 

AC 

Fixed 

Var 

CR 

Motor 

AFC 

12 

1-F 

No 

Yes 

455 

TG-528 

129.50 

VT 

Wood 

B.P.S.U 

12-M 

None 

3 

10-EE 

14 

AC 

Fixed 

Var 

CR 

None 

Yes 

455 

CG-184 

94.50 

CON 

Wood 

B,P,S 

7-MO 

1 

3 

12-EE 

2)4 

AC-DC 

Fixed 

Var 

CR 

None 

Yes 

455 

CG-674 

99.90 

CON 

Wood 

B.P.S 

7-MO 

None 

3 

12-EE 

4 

AC 

Fixed 

Var 

CR 

None 

Yes 

455 

CX-304 

129.50 

CON 

Wood 

B.P.S 

11-M 

1 

3 

12-EE 

6 

AC-DC 

Fixed 

Var 

CR 

None 

Yes 

455 

CG-508 

149.50 

CON 

Wood 

B.P.S.U 

10-MO 

None 

3 

12-EE 

10 

AC 

Fixed 

Var 

CR 

None 

Yes 

455 

CH-594 

159.50 

CON 

Wood 

B.Si.S 

9-MO 

None 

3 

12-EE 

5.8 

AC 

Fixed 

Var 

CR 

Motor 

AFC 

12 

1-F 

No 

Yes 

455 

CG-528 

169.50 

CON 

Wood 

B.P.S.U 

12-M 

None 

3 

12-EE 

14 

AC 

Fixed 

Var 

CR 

None 

Yes 

455 

TP-423 

99.50 

PC-T 

Wood 

B.P.S 

6-MO 

1 

3 

6-EE 

2V2 

AC-DC 

Fixed 

Var 

No 

None 

Yes 

455 

PH-474 
PH-664 
QG-184 
QG-674 
QG-584 


149.50 
149.50 
149.50 
149.50 
149.50 


PC-C 
PC-C 
PC-C 
PC-C 
PC-C 


Wood 
Wood 
Wood 
Wood 
Wood 


B.Si.S 
B,S,,S 
B.P.S 
B.P.S 
B.P.S 


6-MO 
6-OM 
7-MO 
7-MO 
8-0 


1 
None 

1 
None 
None 


12-EE 
12-EE 
12-EE 
12-EE 
12-EE 


5 

2V2 
4 
6 


AC-DC 

AC 

AC-DC 

AC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

Var  CR 

Var  CR 

Var  CR 


Mech 
Mech 
None 
None 
None 


Yes 
Yes 


1-F 
1-F 


No       Yes 
No       Yes 

Yes 
Yes 
Yes 


RG-184  $169.50 

RG-674  169.50 

PH-484  169.50 

PH-874  169.50 


PC-C  Wood  B.P.S  8-0 

PC-C  Wood  B.P.S  7-MO 

PC-C  Wood  B.Si.S  7-MO 

PC-C  Wood  B.Si.S  7-MO 


None 

1 
None 

1 
None 


12-EE 
12-EE 
12-EE 
12-EE 
12-EE 


AC 

AC-DC 

AC 

AC-DC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

Var  CR 

Var  CR 


None 
None 
None 
Mech 
Mech 


Yes 

Yes 


1-F 

1-F 


Yes 
Yes 
Yes 
No  Yes 
No       Yes 


QX-304  194.50  PC-C  Wood  B,P,S 

SG-184  239.50  PCA-C  Wood  B,P,S 

SG-674  239.50  PCA-C  Wood  B,P,S 

RX-304  249.50  PCA-C  Wood  B.P.S 

PG-524  275.00  PCA-C  Wood  B.P.S.U 


11-M 

1 

3 

12-EE 

6 

AC-DC 

Fixed 

Var 

CR 

None 

7-MO 

1 

3 

12-EE 

2H 

AC-DC 

Fixed 

Var 

CR 

None 

7-MO 

None 

H 

12-EE 

4 

AC 

Fixed 

Var 

CR 

None 

11-M 

1 

3 

12-EE 

6 

AC-DC 

Fixed 

Var 

CR 

None 

12-M 

None 

3 

12-EE 

14 

AC 

Fixed 

Var 

CR 

None 

Yes 
Yes 
Yes 
Yes 
Yes 


Port-o-matic  Corp. 

Kl                $260.00 
110                 135. 00t 
112                 145. 00t 
100                   89.95t 
8P                    59.50t 

,  1013  Madison  Ave 
PCA-C    Wood 
PCA-P    Fab.t 
PCA-P    Fab.t 
PC-P       Fab.t 
PORT     Fab.t 

,  New  York. 
B,P,S,U,W 
B.S 
B.S 
B.S 
B.S 

N.  Y.— ' 

NS 

7-MO 

7-MO 

6-MO 

7-MO 

'Fidelomatlc," 
None         3 
1            2 
1            2 
1             2 
1            2 

"Port-o-matic" 

12^-EE    15 
634-EE      3 
6%-EE      3 

6-VEE      3 
6H-EE     3 

150  AC-DC  Var 
70  AC-DC    Fixed 
70  AC-DC    Fixed 
70  AC-DC    Fixed 
50  AC-DC    Fixed 

Var 

Var 
Var 
Var 
Var 

CR 
CR 
CR 

cr' 

None       

None       

None        

None        

None        

Yes 

Yes 

Yes 

Yes 

Yes 

456 

456 
456 
456 
456 

7P                    49.50 

PORT     Cloth 

B.S 

6-MO 

1 

2 

6«-EE      3 

50  AC-DC    Fixed 

Var 

None 

None        

Yes 

456 

t  Prices  given  are  for  Fabricoid  covered  case,  Rawhide.  Cowhide,  Cloth  coverings  at  increased  prices 
RCA  Mfg.  Co.,  Inc.,  Front  &  Cooper  Sts.,  Camden,  N.  J.- 


HF8 
HF6 
HF4 
HF2 
HF1 


$250.00 
20(1.(10 
175.00 
165.00 
125.00 


CON 
CON 
CON 
CON 
CON 


Wood 
Wood 
Wood 
Wood 
Wood 


B,P,S 
B.P.S 
B.P.S 
B.P.S 
B 


16-M 
14-M 
12-M 
12-M 
8-M 


'RCA-Victor" 

None  3 
None  3 
None  3 
None  3 
None   None 


12-EE 
12-EE 
12-EE 
12-EE 
12-EE 


24 
12 
12 
12 
12 


180  AC 
135  AC 
125  AC 
125  AC 
115  AC 


Var 
Var 
Var 
Var 
Fixed 


Step  CR 

Step  CR 

Var  CR 

Var  CR 

Var  None 


Motor 
Motor 
Motor 
Motor 
C&It 


AFC-CC  8 
AFC-CC  8 
CC  8 

CC  8 

CC  8 


1-R 
1-R 
1-R 
1-R 
3-R 


Yes 
Opt 
Opt 
Opt 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


911K 

910KG 

99K 

98K 

97KG 


145.00 
125.00 
99.95 
89.95 
85.00 


CON 
CON 
CON 
CON 
CON 


Wood 
Wood 
Wood 
Wood 
Wood 


B.P.S 
B.Si.S 
H.S,,S 
B.SlS 
B.Si.S 


11-M 

10-M 

9-M 

8-M 

7-M 


None 
None 
None 
None 
None 


12-EE 
12-EE 
12-EE 
12-EE 
12-EE 


12  120  AC 

12  120  AC 

12  120  AC 

iy2  80  AC 

4H  80  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Var  CR 

Var  CR 

Var  CR 

Var  CR 


Motor 
Motor 
Motor 
Motor 
C&It 


CC 
CC 
CC 
CC 
CC 


1-R 
1-R 
1-R 
1-R 
2-R 


Opt      Yes 
Opt      Yes 


Opt 
Opt 
No 


Yes 
Yes 
Yes 


96K2 

69.95 

CON 

Wood 

B.Si.S 

6-M 

None 

2 

12-EE 

4H 

75  AC 

Fixed 

Var 

None 

C&It 

CC 

6 

2-R 

No 

Yes 

96K 

49.95 

CON 

Wood 

B.S 

6-M 

None 

2 

12-EE 

4M 

75  AC 

Fixed 

Var 

None 

C&It 

CC 

6 

2-R 

No 

Yes 

97E 

79.95 

CS 

Wood 

B.Si.S 

7-M 

None 

2 

8-EE 

4H 

80  AC 

Fixed 

Var 

CR 

C&It 

CC 

6 

2-R 

No 

Yes 

96E 

49.95 

CS 

Wood 

B 

6-MO 

None 

2 

6-EE 

4 

75  AC 

Fixed 

Var 

None 

C&It 

CC 

5 

2-R 

No 

Yes 

99T 

89.95 

VT 

Wood 

B.Si.S 

9-M 

None 

3 

8-EE 

12 

120  AC 

Fixed 

Var 

CR 

Motor 

CC 

8 

1-R 

Opt 

Yes 

(Continued  on  page  32) 


%  Line  voltage  dropping  resistors  of  plug-in  type,  commonly  referred  to  as  ballast  resistors  or  tubes. 


28 


Index  to  codes  on  pages  16  and  34 


Radio  Today 


July,   1938 


29 


_d 


n  Ma  Dealer' 

TABLE  MODELS      »ft 


IN  THE  POPULAR 
HORIZONTAL  STYLE 

$0095 


pe*klu£.*»» 


PRICED 
FROM. 


39 


F.  0.  B. 
FACTORY 


79$ 


ORy 


No.  320-H  No.  325-J 

It  strengthens  Stromberg-Carlson's  already 
dominant  position  in  the  price  range 
above  $150 — the  real  profit  range  of  radio 
— with  a  line  full  of  "selling-up"  features. 
It  storms  the  $100  to  $150  big  volume 
profit  range  with  authentic  Period  Styles 
and  Labyrinth  Models  from  $119.50*. 
It  invades  the  volume  range — under  $100 
—  with  Stromberg- Carlson  Table  Models 
from  $39.95*  and  Consoles  from  $79.95*. 


It  multiplies  sales  possibilities  in  the 
highly  profitable  combination  and  chair- 
side  market  with  popular  priced  Radio 
Phonographs  and  new  style  "Chairsides." 

It's  a  line  that  puts  a  dealer  back  into  money 
making  in  his  radio  department.  Mail  cou- 
pon  for  information  regarding  franchise. 

*F.  O.  B.  Factory 

STROMBERG-CARLSON  TELEPHONE  MFG.  CO. 

ROCHESTER,  N.  Y. 


Sr'/z&te.  c^z.  *?2bfi6uw?'<^'/&ze4.  Z/&2ti  a 


taomb 


30 


Radio  Today 


UNE  YOU  ASKED  FOR/ 


«Sg 


#* 


n\% 


.«» 


*&c 


«. 


*&■ 


~*WQ 


No,  335-L 


No.  337-L 


No.  350-M 


July,   1938 


31 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS— Compiled  by  Radio  Today 


List 

price 

Cabinet 

-     Wave- 
bands 

Number 

tubes 
tRMA 

lil-|l!l. 

Plug-  Cond. 
In     gang     Spkr. 
re-       sec-    size  & 
sistor%  tions  type 

Watts 
audio 
power 

(Max.i 

Power 
Supply 
and 
watts 

Selec- 
tivity 

Tone 
con- 
trol 

Vis- 
ual 
tun- 
ing   1 

Automatic  Tuning 

AVC 

rype 

Drift 
jomp. 

Stations 

Adjust 
Vo.   ments 

Re- 
mote 
■  con- 
trol 

I.F. 

No. 

Style 

Material 

Peak 

RCAMfg 

97T 
96T3 
96T2 
96T1 
96T 

Co.,  Inc. — Continued 
59.95       FT           Wood 
49.95       FT           Wood 
39.95      FT           Wood 
34.95       FT           Wood 
29.95       FT           Wood 

B.Si.S 

B.Si.S 

B.S 

B 

B 

7-M 

6-M 

6-M 

6-MO 

6-MO 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

6-EE 
6-EE 
6-EE 
5-EE 
5-EE 

4 
4 

4 
4 
4 

80  AC 
75  AC 
75  AC 
75  AC 
75  AC 

Fixed 
Fixed 
.  Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

CR 

None 
None 
None 
None 

C&It 

C&It 
C&It 
C&It 

CX  1 1 

CC 
CC 
CC 
CC 
CC 

6 
6 
6 
5 
5 

2-R 

2-R 
2-R 
2-R 
2-R 

No 
No 
No 
No 
No 

Yes 
Yes 
Yes 
Yes 
Yes 

455 

455 
455 
455 
455 

95T5 
95T1 
98X 
97X 
95X1 

24.95 
NS 

59.95 
NS 

NS 

FT 
FT 
FT 
FT 
FT 

Wood 
Wood 
Wood 
Wood 
Wood 

B 
B 

B.Si.S 

B 

B 

5-OM 
5-OM 

7-M 

6-MO 

4-MO 

None 
None 

1 

1 

1 

2 
2 
2 
2 
2 

5-EE 
5-EE 
6-PM 
5-EE 

5  EE 

IK 
IK 
2K 
IK 
IK 

50  AC 
50  AC 
55  AC-DC 
50  AC-DC 
50  AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 

None 

Var 

Var 

None 

None 

None 

CR 

None 

None 

C&It 
None 
C&It 
C&It 
CT 

CC 

cc' 

CC 

None 

5 

'6' 
5 
5 

2-R 

2-R 
2-R 
2-B 

No 

No' 

No 

No 

Yes 
Yes 
Yes 
Yes 
No 

455 
455 
455 
455 
TRF 

95X 

9X 

U134 

U132 

U130 

NS 

NS 

355.00 

280.00 

230.00 

FT 

MT 

PC-C 

FCC 

PC-C 

Wood 
Wood 
Wood 
Wood 
Wood 

B 

B 

B.P.S 
B,P,S 
B.P.S 

4-MO 
4-MO 
16-M 
14-M 
12-M 

1 
None 
None 
None 
None 

2 
2 
3 
3 

3 

5-EE 

3-EE 

12-EE 

12-EE 

12-EE 

IK 

IK 

24 

12 

12 

50  AC-DC 
50  AC-DC 
205  AC 
160  AC 
150  AC 

Fixed 

Fixed 

Var 

Var 

Var 

None 
None 
Step 
Step 
Var 

None 

None 

CR 

CR 

CR 

None 

None 

Motor 

Motor 

Motor 

AFC-CC  8 
AFC-CC  8 
CC           8 

i-R 
1-R 
1-R 

Opt 
Opt 
Opt 

No 
No 
Yes 
Yes 
Yes 

TRF 
TRF 

455 
455 
455 

U128 

U126 

U124 

U122E 

U119 

185.00 
155.00 
99.95 
99.95 
79.95 

PC-C 

PC-C 

PC-C 

PC-CS 

PC-T 

Wood 
Wood 
Wood 
Wood 
Wood 

B.Si.S 
B.Si.S 
B.Si.S 
B.Si.S 
B.Si.S 

10-M 

10-M 

6-M 

6-M 

6-M 

None 
None 
None 
None 
None 

:-: 
3 
2 
2 
2 

12-EE 

12-EE 

12-EE 

8-EE 

6-EE 

12 

12 

4K 

4K 

4K 

145  AC 
145  AC 
105  AC 
105  AC 
105  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

CR 
CR 

None 
None 
None 

Motor 

Motor 

C&It 

C&It 

C&It 

CC 
CC 
CC 
CC 
CC 

8 
8 
6 
6 
6 

1-R 
1-R 
2-R 
2-R 
2-R 

Opt 
Opt 
No 
No 
No 

Yes 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 
455 

Ulll 

39.95 

PC-T 

Wood 

B 

5-OM 

None 

2 

5-EE 

4 

80  AC 

Fixed 

Step 

None 

None 

Yes 

455 

Sentinel  Radio  Corp.,  2222  Diversey  Pky.,  Chicago, 
137UT          $15.00      MT         Plastic         B 
124AT             19.95       FT           Plastic         B 
124AA             39.95       CS            Wood           B 
124  ACT         39.95      CON       Wood          B 
125ATE        NS             FT           Wood           B,S 

IU.— "Sentinel"  | 

5-M  incl.  resistor 
5-G             None 
5-G             None 
5-G            None 
6-GM        None 

2 
2 
2 
2 

■1 

3M-EE 

5-EE 

8-EE 

8-EE 

6-EE 

2 

2K 

2K 

2K 

3K 

45  AC-DC 
30  AC 
30  AC 
30  AC 
50  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
Vaa- 

None 
None 
None 
None 
CR 

None 

It 

It 

It 

It 

None 
None 
None 
None 

'  '4' 
4 
4 
5 

i-F" 
IF 
1-F 

1-F 

No" 

No 

No 

No 

No 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 
455 

125ACE 

NS 

CON 

Wood 

B.S 

6-GM 

None 

2 

8-EE 

3K 

50  AC 

Fixed 

Var 

CR 

It 

None 

5 

1-F 

No 

Yes 

455 

McMurdo  Silver  Corp.,  2900  S.  Michigan  Ave.,  Chicago,  111. — ' 
Orpheon      S165.00      CON       Wood          B                     7-M 

McMurd 

None 

>  Si 
2 

ver,"  "Masterpiece,"  "Orpheon" 

15-EE       20              100  AC         Fixed 

Var 

None 

None 

Yes 

No 

TRF 

VI              355.00 
15-17             205.00 

Chassis 
Chassis 

only 
only 

B,P,S,U,W 
B.P.S.U 

20-M 

15-M 

None 
None 

4 
3 

18-EE 
15-EE 

34 
20 

200  AC 
180  AC 

Var 
Var 

Var 
Var 

CR 
CR 

None 
None 

Yes 
Yes 

465 
472 

Sonora  Radio  &  Television 

P99                    9.99       MT 
P100                  9.99       MT 
PS102              12.95       MT 
B-22                18.95      FT 
D12                  34.95       FT 

Corp.,  Merchandise  Mart,  Chicago,  111. — "Sonora,  Clear  as  a  Bell" 
Wood           B                      4-MO        None         2       3K-EE      2 
Plastic         B                      4-MO         None         2       3^-EE      2 
Plastic         B                      5-OM         None          2       3^-EE     2 
Plastic         B,S!                  6-OMincl,  resistor    2       5-EE          2 
Wood           B.S]                  6-OM  incl.  resistor    2       6-EE          2 

AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 
None 
None 
None 
Var 

None 
None 
None 
None 
None 

None 
None 
None 
None 
None 

No 
No 
Yes 
Yes 
Yes 

TRF 
TRF 

456 
456 
456 

DA12 

DD14 

DDA14 

A-11 

R-66 

37.95 
29.95 
32.95 
12.95 
54.95 

FT 
FT 
FT 
FT 

FT 

Wood 
Wood 
Wood 
Plastic 
Wood 

B,Si 

B.Si 

B,Si 

B 

B.P.S 

6-OM  incl.  resistor 
6-OM  incl,  resistor 
6-OM  incl.  resistor 
5-GO  incl.  resistor 
8-OM  incl.  resistor 

2 

2 
2 
3 

6-EE 
5-EE 
5-EE 
5-EE 
8-EE 

2 

9 
2 
2 
6 

AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 

Fixed 
Fixed 
Fixed 
Fixed 

Fixed 

Var 

None 

None 

None 

Var 

None 
None 
None 
None 
None 

Mech 
None 
Mech 
None 
None 

None 
None 

4 
"4' 

1-F 
i-F" 

No 
No" 

Yes 
Yes 
Yes 
No 
Yes 

456 

456 

456 

TRF 

456 

RA66 

R88 

RA88 

BA22 

C22 

59.95 

69.95 

79.95 

NS 

18.95 

FT 

CON 

CON 

FT 

FT 

Wood 
Wood 
Wood 
Plastic 
Plastic 

B.P.S 

B.P.S 

B.P.S 

B-Si 

B 

8-OM  incl.  resistor 
8-OM  incl.  resistor 
8-OM  incl.  resistor 
6-OM  incl.  resistor 
6-OM  incl.  resistor 

:■; 
3 
3 
2 

■1 

8-EE 
8-EE 
8-EE 
5-EE 
5-EE 

6 
6 
6 
2 
2 

AC-DC 
AC-DC 
AC- DC 
AC-DC 

AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
None 

None 

None 
None 
None 
None 
None 

It 

None 
It 

Mech 
None 

None 

None 
None 

8 

"8' 
4 

1-F 

i-F' 
1-F 

No 

No" 
No 

Yes 
Yes 
Yes 
Yes 

Yes 

456 
456 
456 
456 
456 

E33 

EA33 

F55 

FA55 

G66 

33.95 
37.95 
39.95 
43.95 
59.95 

FT 
FT 
FT 
FT 
FT 

Wood 
Wood 
Wood 
Wood 
Wood 

B,S 

B.S 

B,P,S 

B.P.S 

B.P.S 

6-OM  incl.  resistor 
6-OM  incl.  resistor 
7-OM         None 
7-OM         None 
8-OM        None 

2 
2 
2 
2 

:■: 

6-EE 
6-EE 
6-EE 
6-EE 
8-EE 

3 

3 
5 
5 

7K 

AC 
AC 
AC 
AC 
AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

None 
None 
None 
None 
None 

None 
Mech 
None 
Mech 
None 

None 
None 

"6' 

"6' 

i-F' 

i-F' 

No" 
No" 

Yes 
Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 
456 

GA66 

G88 

GA88 

KA109 

F77 

69.95 
79.95 
89.95 
109.95 
59.95 

FT 

CON 

CON 

CON 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B.P.S 
B,P,S 
B.P.S 
B.P.S 
B.P.S 

8-OM 
9-OM 
9-OM 
12-OM 
7-OM 

None 
None 
None 
None 
None 

:-; 
3 
3 
3 
2 

8-EE 
12-EE 
12-EE 
12-EE 
8-EE 

7K 
7K 

VK 
12 
5 

AC 
AC 
AC 
AC 
AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

None 
None 
None 
None 
None 

Motor 
None 
Motor 
Motor 
None 

None 

None 
None 

6 

"6" 
6 

1-F 

i-F' 
1-F 

No 

No" 

No 

Yes 
Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 
456 

FA77 

64.95 

CON 

Wood 

B,P,S 

7-OM 

None 

■J. 

8-EE 

5 

AC 

Fixed 

Var 

None 

Mech 

None 

6 

1-F 

No 

Yes 

456 

Sparks- Wlthington  Co.,  Plant  3,  Jackson,  Mich. — ' 
5008              $12.95     -PORT     Plastic         B 
5018                19.95      FT           Metal          B 
5518A             19.95      FT           Metal          B 
538                  24.95      FT           Wood          B,P,S 
628                   29.95       VT           Wood           B,P,S 

'Sparton" 
5-0  incl 
5-0  incl 
5-G 
5-0 
6-0 

resistor       2 
resistor  None 
None         2 
None          2 
None         2 

5-EE 
5-EE 
5-EE 
6-EE 
6-EE 

2 

2 

3.4 

3.4 

3.4 

45  AC-DC 
45  AC-DC 
50  AC 
60  AC 
65  AC 

Fjced 
Fixed 
Fixed 
Fixed 
Fixed 

None 

None 

None 

Var 

Var 

None 
None 
None 
None 
CR 

None 

Ct 

Mech 

None 

None 

None 
None 

"6' 

4 

r" 

F 

No" 

No 

No 
No 
Yes 
Yes 
Yes 

TRF 
TRF 

456 
456 
456 

5218 
6218 
558B 
678A 
7618 

34.95 
44.95 
49.95 
59.95 
69.95 

FT 

FT 

FT 

CON 

CON 

Wood 
Wood 
Glass 
Wood 
Wood 

B.S 

B,S 

B.S 

B.P.S 

B.S 

5-G 

6-GO 

5-G 

6-0 

7-GO 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

6-EE 

6-EE 

6-EE 

10-EE 

10-EE 

3.4 
3.6 
3.4 
3.4 
3.6 

50  AC 
50  AC 
60  AC 
65  AC 
50  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 

None 

CR 

None 

CR 

CR 

Mech 

Mech 

None 

Ct 

Mech 

None 
None 

None 
None 

6 
6 

"(5' 
6 

F 
F 

R  " 

F 

No 

No 

No' 

No 

Yes 
Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 
456 

768 

8618 

1068 

1568 

1288P 

578 

79.95 
89.95 
99.95 
159.50 
250.00 
59.95 

CON 
CON 
CON 
CON 
PC-C 
CS 

Wood 
Wood 
Wood 
Wood 
Wood 
Wood 

B.P 

B.P.S 

B.P.S 

R.P.S 

B,P,S 

B.S 

7-0 

8-0 

10-0 

15-OG 

12-OG 

5-G 

None 
None 
None 
None 
None 
None 

3 
3 
3 
3 
3 
2 

10-EE 
10-EE 
10-EE 
15-EE 
12-EE 
6-EE 

3.4 
4K 

15 
6 
3.4 

70  AC 
85  AC 
95  AC 
155  AC 
130  AC 
60  AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

Var 
Var 
Var 
Var 
Var 
Var 

CR 

None 
CR 
CR 
CR 

None 

None 

Ct 

Ct 

Ct 

Ct 

None 

AFC 
AFC 
AFC 
AFC 

"6' 
6 
6 
6 

k" 

R 
R 
R 

No" 
No 
No 
No 

Yes 
Yes 
Yes 
Yes 
Yes 
Yes 

456 
456 
456 
456 
456 
456 

738 

69.95 

VT 

Wood 

B 

7-0 

None   None 

6-EE 

4H 

65  AC 

Fixed 

Var 

None 

Ct 

NS 

NS 

NS 

No 

Yes 

456 

Stewart-Warner  Corp.,  1826  Diversey  Pky.,  Chicago,  111. — "Magic  Keyboard  Radios 
91-511  &  512                 FT           Wood          B                     5-OM        None         2      5-EE 
91-513  &  514                   FT           Wood           B                      5-OM         None         2       5-EE 
97-521  &  524                   FT            Wood           B                      5-OM             1             2       5-EE 
91-531            NS             VT           Wood           B,S                   5-OM         None         2       6-EE 
91-536            NS             CS            Wood           B.S                   5-OM         None         2       8-EE 

1.6 
1.6 
1.9 
2.8 
2.8 

35  AC 
35  AC 
45  AC 

40  AC 
40  AC 

<F"ixed 
Fixed 
Fixed 
Fixed 
Fixed 

Step 
Step 
Step 
Step 
Step 

None 
None 
None 
None 
None 

Mech 

Mech 

Mech 

CT 

CT 

None 
None 
None 
None 
None 

4 

4 
4 
5 
5 

F' 
F 
F 
F 
F 

No 
No 
No 
No 
No 

Yes 
Yes 
Yes 
Yes 
Yes 

465 
465 
465 
465 
465 

91-537 
91-561 
91-562 
91-617 
91-621 


NS 
NS 
NS 
NS 
NS 


CON 

FT 

FT 

CON 

FT 


Wood 
Plastic 
Plastic 
Wood 
Wood 


B.S 

B 

B 

B.Si.S 

B.S 


5-OM 

4-0 

4-0 

6-OM 

6-OM 


None 

1 

1 
None 
None 


8-EE 
5-EE 
5-EE 
8-EE 
6-EE 


2.8 
2.2 
2.2 
4K 
2.8 


40  AC 
45  AC-DC 
45  AC-DC 
60  AC 
45  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Step  None 

Step  None 

Step  None 

Step  CR 

Step  CR 


Ct 

Mech 
Mech 
Ct 
Ct 


None 
None 
None 
None 
None 


No 
No 
No 
No 
No 


Yes 
No 
No 
Yes 
Yes 


91-627            NS 

CON 

Wood 

B.S 

6-OM 

None 

2 

8-EE          2.8 

45  AC 

Fixed 

Step 

CR 

Ct 

None 

5 

F 

No 

Yes 

91-717           NS 

CON 

Wood 

B,P,S 

7-0 

None 

3 

10-EE       4K 

65  AC 

Fixed 

Step 

CR 

Ct 

None 

6 

F 

No 

Yes 

91-817           NS 

CON 

Wood 

B.Si.S 

8-OM 

None 

3 

12-EE       7 

100  AC 

Fixed 

Step 

CR 

Ct 

None 

6 

F 

No 

Yes 

91-1117         NS 

CON 

Wood 

B.Si.S 

11  -OM 

None 

3 

12-EE        12 

110  AC 

Var 

Step 

CR 

Motor 

None 

8 

R 

Yes 

Yes 

Stromberg-Carlsor 

Teleph 

3ne  Mfg. 

Co.,  100  Carlson  Rd.,  Rochester, 

N.  Y. 

— "Stromberg-Carl 

son" 

320H             $39.95 

FT 

Wood 

B,S 

5-OM 

None 

2 

6-EE          2 

40  AC 

Fixed 

Step 

None 

None 

Yes 

325 J                 49.95 

FT 

Wood 

B,S 

5-OM 

None 

2 

6-EE          2 

42  AC 

None 

Ct 

CC 

None 

None 

No 

Yes 

337H                89.50 

FT 

Wood 

B,S,,S 

7-MG 

None 

3 

8J4-EE      31^ 

70  AC 

Fixed 

Var 

CR 

Ct 

CC 

6 

2-F 

No 

Yes 

340H              115.00 

FT 

Wood 

B.S 

9-MO 

None 

2 

10K-EE    10 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

335L               79.95 

CON 

Wood 

B.S 

7-MO 

None 

2 

12-EE        3K 

70  AC 

Fixed 

Var 

CR 

Ct 

CC 

6 

2-F 

No 

Yes 

(Continued  on  page  34) 


%  Line  voltage  dropping  resistors  of  plug-in  type,  commonly  referred  to  as  ballast  resistors  or  tubes. 


32 


Index  to  cedes  en  pages  16  and  34 


Radio  Today 


TO  FRANC H I SED  DIALER* 


This  12  Foot 
5   Color 


Sparton  Action 
Display 


byanh°"  ,nrawo 

7kke  Action! 

Get  all  the  profit-making  details — Sparton 
Advertising  plans — Sparton  selling  plans — 
Sparton  prices  lowest  in  history. 

Ask   your   distributor    for    full   information. 

The  Sparks-Withington  Co.,  Jackson,  Michigan 


Model  8618 

A  new  trend  in  cabinet  design  and  utility. 


Mfgs.-  Radios-  Electric  Refrigerators •  Auto  Horns 


July,   1938 


33 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS 

—  Compiled  by 

!?ac//o  Today 

Number        Plug 

Cond. 

Watts       Power 

Vis- 

Au 

tomatic  Tuning 

Stations 

Re- 

Cabinet 

tubes              in 

gang 

Spkr. 

audio        Supply 

Tone 

ual 

mote 

Model             List 
No.               price 

(RMA            re-       sec 

defin)       sistor%  tion 

power        and 
(Max.l        watts 

Selec 

Drift 

Adj  ust 
ments 

-  con- 
trol 

I.F. 
Peak 

Style 

Material 

band 

s     type 

tivitj 

trol 

ing 

Type 

Comp 

No 

AVC 

Stromberg-Carlsor 

Telephone  Mfg. 

Co. — Continued 

337L                99.95 

CON 

Wood 

BSi.S 

7-MG        None 

3 

12-EE 

3^ 

70  AC 

Fixed 

Var 

CR 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

340M             127.50 

CON 

Wood 

B.S 

9-MO         None 

2 

10Ji-EE 

10 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

345M             150.00 

CON 

Wood 

B.Si.S 

10-MO      None 

2 

10^-EE 

10 

90  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455     i 

350M             175.00 

CON 

Wood 

B.P.S 

11-MG       None 

3 

10'4-EE 

15 

120  AC 

Var 

Var 

CR 

Ct 

AFC 

8 

2-F 

No 

Yes 

455 

320T                99.50 

F 

Wood 

B.S 

5-OM        None 

2 

6-EE 

2 

40  AC 

Fixed 

Step 

None 

None 

Yes 

455 

325S                 99.50 

F 

Wood 

B.S 

5-OM         None 

2 

6-EE 

2 

42  AC 

Fixed 

Step 

None 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

325N                99.50 

F 

Wood 

B.S 

5-OM         None 

9 

6-EE 

2 

42  AC 

Fixed 

Step 

None 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

341R               145.00 

CS 

Wood 

B.S 

9-MO         None 

2 

10K-EE 

10 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

340V                119.50 

F 

Wood 

B.S 

9-MO         None 

2 

8J4-EE 

10 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

213F               155.00 

CS 

Wood 

B.P.S 

7-MO         None 

2 

I"',  EE 

3H 

65  AC 

Fixed 

Var 

CR 

None 

Yes 

465 

340F               135.00 

CON 

Wood 

B.S 

9-MO         None 

2 

im4-i  e 

10 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

345F               165.00 

CON 

Wood 

B.Si.S 

10-MO       None 

3 

10J4-EE 

10 

90  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

350V               199.50 

F 

Wood 

B.P.S 

11 -MO       None 

3 

10J4-EE 

15 

120  AC 

Var 

Var 

CR 

Ct 

AFC 

8 

2-F 

No 

Yes 

455 

350R              215.00 

F 

Wood 

B.P.S 

11 -MO      None 

3 

10M-EE 

15 

120  AC 

Var 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

360M             265.00 

F 

Wood 

B.P.S 

12-MO      Nore 

3 

IOV4-EE 

15 

135  AC 

Var 

Var 

CR 

Motor 

AFC 

8 

1-R 

Yes 

Yes 

455 

370M             325.00 

F 

Wood 

B.P.S 

14-MO       None 

4 

lOy-EE 

18 

150  AC 

Var 

Var 

CR 

Motor 

AFC 

8 

1-R 

Yes 

Yes 

455 

336P               135.00 

PC-CS 

Wood 

B.S 

7-MO        None 

9 

10^-EE 

3^ 

80  AC 

Fixed 

Var 

CR 

Ct 

CC 

6 

2-F 

No 

Yes 

455 

340P               175.00 

PC 

Wood 

B.S 

9-MO         None 

2 

8J4-EE 

10 

100  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

341P              265.00 

PC 

Wood 

B.S 

9-MO         None 

2 

ioy-EE 

10 

100  AC 

Fixed 

Var 

CR 

Ct 

CC 

8 

2-F 

No 

Yes 

455 

350P              360.00 

PC 

Wood 

B.P.S 

11 -MO       None 

3 

lOJ-i-EE 

15 

140  AC 

Var 

Var 

CR 

Ct 

AFC 

8 

2-F 

No 

Yes 

455 

260P              795.00 

PC 

Wood 

B,P,S 

16-MO       None 

4 

1     Two 
U0&-EE 

30 

260  AC 

Var 

Var 

CR 

Mech 

AFC 

7 

1-R 

No 

Yes 

465 

Trebor  Radio  Co., 

Pasadena 

Calif.—' 

Trebor" 

T60                 S34.95 

FT 

Wood 

B.S 

6-M            None 

2 

6-EE 

4 

55  AC 

Fixed 

Var 

None 

Motor 

None 

6 

1-R 

No 

Yes 

455 

T81                   49.95 

FT 

Wood 

B.P.S 

8-M            None 

3 

8-EE 

8 

80  AC 

Fixed 

Var 

None 

Motor 

CC 

8 

1-R 

Yes 

Yes 

455 

T54                   19.95 

FT 

Plastic 

B 

5-M            None 

2 

5-EE 

2!4 

40  AC 

Fixed 

None 

None 

Mech 

None 

4 

1-R 

No 

Yes 

455 

T53                   1995 

FT 

Wood 

B 

5-M            None 

2 

5-EE 

2 

40  AC-DC 

Fixed 

None 

None 

None 

Yes 

455 

Ultramar  Mfg.  Corp.,  1160  Howe  St., 

Chicago, 

11  — 

"Ultramar" 

386                 NS 

NS 

NS 

B.P.S 

5-OG              1 

2 

6-EE 

2 

60  AC-DC 

Fixed 

None 

None 

Ct* 

None 

7 

2-F 

No 

Yes 

165 

387                 NS 

NS 

NS 

B.S.W 

5-OG              1 

2 

6-EE 

2 

60  AC-DC 

Fixed 

None 

None 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

385                 NS 

NS 

NS 

B.P.S 

5-OG          None 

2 

6-EE 

5 

70  AC 

Fixed 

None 

None 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

395                 NS 

NS 

NS 

B.S.W 

5-OG          None 

2 

6-EE 

5 

70  AC 

Fixed 

None 

None 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

396                 NS 

NS 

NS 

B.P.S 

7-OG          None 

2 

8-EE 

5 

80  AC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

397                 NS 

NS 

NS 

B.S.W 

7-OG          None 

2 

8-EE 

5 

80  AC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Tes 

465 

387                NS 

NS 

NS 

B.P.S 

8-0             None 

3 

8-EE 

6 

90  AC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

378                 NS 

NS 

NS 

B.S.W 

8-0             None 

3 

8-EE 

6 

90  AC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465      1 

389                 NS 

NS 

NS 

B.P.S 

8-OG              1 

3 

8-EE 

2H 

95  AC-DC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465      1 

398                 NS 

NS 

NS 

B.S.W 

8-OG              1 

3 

8-EE 

2W 

95  AC-DC 

Fixed 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

838                 NS 

NS 

NS 

B.Si.U 

9-MO         None 

3 

8-EE 

6 

95  AC 

Var 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

839                 NS 

NS 

NS 

B.Si.U.W 

9-MO         None 

3 

8-EE 

6 

95  AC 

Var 

Var 

CR 

Ct* 

None 

7 

2-F 

No 

Yes 

465 

r Automatic  tuning  optional. 

Montgomery  Ward  &  Co.,  619  W.  Chicago  Ave 

,Ch 

cago.  111. — "Airline" 

62-325            NS 

FT 

Plastic 

B 

4-MO             1 

2 

5-EE 

1.3 

45  AC-DC 

Fixed 

None 

None 

None 

No 

456 

62-350            NS 

FT 

Plastic 

B 

5-OM         None 

2 

5-EE 

V4 

45  AC 

Fixed 

None 

None 

Mech. 

None 

'  '4' 

i-F' 

No" 

Yes 

465 

62-274            NS 

FT 

Plastic 

B 

6-OM         None 

2 

5-EE 

m 

45  AC 

Fixed 

None 

CR 

Mech 

None 

6 

1-F 

No 

Yes 

465 

62-361           NS 

FT 

Wood 

B.Si 

6-OM         None 

2 

6-EE 

3.4 

50  AC 

Fixed 

Var 

CR 

Mech 

None 

6 

1-F 

No 

Yes 

465 

62-370            NS 

FT 

Wood 

B.S 

7-0             None 

2 

6-EE 

3.4 

50  AC 

Fixed 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

456 

62-390            NS 

FT 

Wood 

B.P.S 

9-MO         None 

3 

6-EE 

4 

70  AC 

Fixed 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

465 

62^70            NS 

CON 

Wood 

B.S 

7-0             None 

2 

8-EE 

3.4 

50  AC 

Fixed 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

456 

62-490            NS 

CON 

Wood 

B.P.S 

9-MO         None 

3 

10-EE 

4 

70  AC 

Fixed 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

465 

62-401            NS 

CON 

Wood 

B.P.S 

11-OM       None 

3 

12-EE 

12 

90  AC 

Var 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

456 

62-403           NS 

CON 

Wood 

B.P.S 

13-0          None 

3 

12-EE 

20 

150  AC 

Var 

Var 

CR 

It 

CC 

6 

1-F 

Yes 

Yes 

456 

Westinghouse  Elec 

.  Supply 

Co.,  150  Varick  St. 

New  York,  N.  Y. — "Westinghouse" 

WR150W      NS 

MT 

Plastic 

B 

4-MO             1 

2 

5-EE 

w* 

AC-DC 

Fixed 

None 

None 

None 

No 

455 

WR150I        NS 

MT 

Plastic 

B 

4-MO             1 

2 

5-EE 

1M 

AC-DC 

Fixed 

None 

None 

None 

No 

455 

WR152          NS 

FT 

Wood 

B 

5-0                 1 

2 

5-EE 

1U 

AC-DC 

Fixed 

None 

None 

None 

Yes 

455 

WR154          NS 

FT 

Wood 

B 

5-0                 1 

2 

5-EE 

w- 

AC-DC 

Fixed 

None 

None 

None 

Yes 

455 

WR158          NS 

VT 

Wood 

B 

6-MO         None 

2 

5-EE 

W2 

AC-DC 

Fixed 

None 

None 

C&It 

None 

"5 

2-R 

No" 

Yes 

455 

WR256          NS 

FT 

Wood 

B 

5-OM         None 

2 

5-EE 

2 

AC 

Fixed 

None 

None 

None 

Yes 

455 

WR258          NS 

VT 

Wood 

B 

5-OM         None 

2 

5-EE 

2 

AC 

Fixed 

None 

None 

C&It 

None 

"5 

2-R 

No" 

Yes 

455 

WR260          NS 

FT 

Wood 

B,P 

5-OM         None 

2 

5-EE 

2 

AC 

Fixed 

Step 

None 

C&It 

None 

5 

2-R 

No 

Yes 

455 

WR262          NS 

FT 

Wood 

B.S 

6-0             None 

2 

6-EE 

3H 

AC 

Fixed 

Var 

CR 

C&It 

None 

6 

2-R 

No 

Yes 

455 

WR264          NS 

VT 

Wood 

B.Si.S 

7-MO         None 

2 

6-EE 

4 

AC 

Fixed 

Var 

CR 

C&It 

None 

6 

2-R 

No 

Yes 

455 

WR366          NS 

CON 

Wood 

B.Si.S 

8-OM         None 

3 

12-EE 

5 

AC 

Fixed 

Var 

CR 

Motor 

CC 

9 

1-R 

No 

Yes 

455 

WR368          NS 

CON 

Wood 

B.Si.S 

10-OM       None 

3 

12-EE 

12 

AC 

Fixed 

Var 

CR 

Motor 

CC 

9 

1-R 

No 

Yes 

455 

WR370          NS 

CON 

Wood 

B.P.S 

12-M          None 

3 

12-EE 

12 

AC 

Var 

Var 

CR 

Motor 

CC 

9 

1-R 

No 

Yes 

455 

WR472          NS 

PC-T 

Wood 

B 

5-OM         None 

2 

5-EE 

3M 

AC 

Fixed 

Step 

None 

None 

Yes 

455 

Wilcox-Gay  Corp., 

Charlotte 

,  Mich. — 

"Wilcox- 

Gay 

A43                S27.50 

WALL 

Wood 

B 

5-M            None 

2 

5-EE 

4.1 

49  AC 

Fixed 

Var 

No 

None 

Yes 

456 

A44                  27.50 

WALL 

Wood 

B 

5-M            None 

2 

5-EF. 

4.1 

49  AC 

Fixed 

Var 

No 

None 

Yes 

456 

A45                  29.95 

PC-T 

Wood 

B 

5-M            None 

2 

5-EE 

4.1 

49  AC 

Fixed 

Var 

No 

None 

Yes 

156 

A50                   14.95 

T 

Wood 

B 

5-G             None 

2 

4-EE 

2 

43  AC-DC 

Fixed 

Var 

No 

None 

Yes 

156 

A51                   13.951; 

MT 

Plasl  i. 

B 

4-M            None 

2 

4-EE 

W 

35  AC-DC 

Fixed 

None 

No 

None 

No 

TRF 

A52                   19.95 
A53                  17.95* 

T 
FT- 

Wood 

B 

5-G             None 

2 

6M-EE 

3.9 

49  AC 

Fixed 

Var 

No 

None 

Yes 

156 

WALL     Plastic 

B 

5-M            None 

9 

5-EE 

li4 

46  AC-DC 

Fixed 

None 

No 

None 

Yes 

156 

A54                  34.95 

T 

Wood 

B.S 

7-GM         None 

3 

6M-EE 

10 

80  AC 

Fixed 

Var 

No 

Mech 

None 

4 

1-F 

No 

Yes 

456 

A55                  49.95 

CON 

Wood 

B,S 

7-GM        None 

3 

6V£-EE 

10 

80  AC 

Fixed 

Var 

No 

Mech 

None 

4 

1-F 

No 

Yes 

456 

*  Ivory,  canarv,  red  cabinets  SI  additional.     #  Iv 

iry,  green,  walnut  S2  additional. 

Zenith  Radio  Corp 

,  6001  Dickens  Ave 

.  Chicago 

III.— 

-Information  not  available  up  to  July  15,. 

See  August  issue 

J<  RADIO  TODAY 

Note:     Zenith  console  shown  on  page 

14,  June 

ssue 

should  have  been  correctly  labeled 

"Zenith  Console  No.  6S362.  6  tubes. 

S59.95 

(Continued  on  page  36) 

%  Line  voltage  dropping  resistors  of  plug-in  type. 

commonly  referred  to  as  ballast  resistors 

or  tubes. 

NOTES 

NS — Data  not  supplied 

WAVEBANDS 

B — Broadcast    (approx.    540-1700  KC) 
P — Police  (approx.  1700-5500  KC) 
Pr— Police   (approx.  1600-3500  KC) 

SPEAKER  TYPE 

EE — Electrically  excited  dynamic 

Mag — Magnetic 

PM — Pernianen    mMnot  Hmgni, 

AUTOMATIC  TUNING 

Type 

Ct — Condenser  trimmer 

S — Shortwave    (approx. 

5500-2 

0,000  KC) 

C&It — Condenser  and  inductance  trimmer 

CABINET  STYLE 

Si- 

-Medium   shortwave 

(approx.    2500-7000) 

POWER  SUPPLY 

It— 

Inductance  trimmer 

CS — Chairside 

U- 

-Ultra  short  wave  (above  25,000  KC) 

AC — Alternating   current 

Mech — Mechanical 

type  of 

unit 

CON — Console   (A 
FT— Flat  table 

so  C) 

w- 

-Weather  band   (approx.  150-350  KC) 

AC-DC— Either 

alternating   or 

direct 

current 

Motor — Motor  operated  mechanism 

F — Furniture   design 

TUBES 

SELECTIVITY 

Drift  compensation 

MT — Miniature  table 

li — mass    (old  style) 
0 — Octal   glass 
o — Octal  glass — midget 
M— Metal 

Fixed — Non-adjustable 

selectivity 

AFC 

— Automatic   freQuenc; 

contro 

PC — Phonograph 
PCA — Phonograph 

Combination 
combination  with  automatic 

type 

Var — Selectivit; 
TONE   CONTROL 

adjustable  from  panel 

of  set 

CC — Compensating   condenser 
No.  of  adjustments  per  station  and  location 

record  changer 
PCM — Phonograph  combination — manua 

of  records 
PORT— Portable   (Also  P) 

change 

GM 
G0- 

MG 
MO 

Mainly  glass,  some  metal 
—Mainly  glass,  some  octal  glass 
— Mainly  metal,  some  glass 
— Mainly  metal,  some  octal  glass 

Step— Step  type   of  tone  control — 2  or  more 

points 
Var — Continuously  variable  tone  control 

B— 
F— 
R— 

bottom  adjusted 
i'ront  adjusted 
Rear  adjusted 

T — Table 

0G- 

Mainly  octal  glass, 

some 

glass 

VISUAL  TUNING 

Remot 

control 

VT     Vertical  table 

OM 

— Mainly  octal  glass 

some 

metal 

CR — Cathode  ray  indicator  tube 

Opt- 

—Optional 

34 

Radio  Today 

—  . 

Dealer  orders  indicate  increasing  sales 

for  1938!  Read  what  distributors  say 

about  dealer  reactions  to  brilliant, 

new  1939  RCA  Victor  radios. 

"Sales  figures  talk!"  says  Alan  Steinert  of  Eastern 
Co.  in  Boston.  "And  the  way  our  dealers  have 
been  placing  orders  for  the  1939  RCA  Victor 
line  is  proof  that  it's  plenty  hot!" 

"Our  dealer  showing  this  year  was  the  most  suc- 
cessful in  our  history.  The  dealers  are  unanimous 
in  saying  RCA  Victor's  line  is  the  greatest  ever, 
and  what's  more,  they're  buying,"  says  Irving 
SarnofT  of  Bruno-New  York. 


CONSOLE  GRAND  MODEL  97KG  (upper  right, 
top  of  page) .  This  radio,  the  newest  note  in  styling, 
offers  you  such  outstanding  sales  features  as  Electric 
Tuning  for  6  stations,  3-band  Straight-Line  Dial, 
Victrola  Button,  "Plug-in"  for  Victrola  Attachment, 
RCA  Victor  Metal  Tubes,  Magic  Eye,  and  a  host  of 
others.  Its  cabinet  beauty  and  beauty  of  tone  make 
it  a  set  that  will  bring  you  many  sales,  large  profits. 

FOR  FARM   HOMES-MODEL  94BT 


For  farm  homes  without  elec- 
tricity —this  exceptional  instru- 
ment was  designed.  It's  Cur- 
rent Cutter  Model  94BT  and 
provides  standout  perform- 
ance with  2-volt  storage  bat- 
tery. New  Current  Cutter  saves 
up  to  one-third  on  batterycosts. 
Other  sales  features  include 
four  tubes,  superheterodyne 
circuit, tuning  range  from  540 
to  1720  kcs.,  dynamic  speaker,  . 
magnetite"frequency  locking"  f( 
transformers  and  Automatic 
Volume  Control.  .  .  $19-95 
Same  cabinet  is  available  for 
6-volt  batterv  operation  in 
Model  94BT-6.     .     .    $29-9  5 


"When  I  looked  at  the  RCA  Victor  1939  line 
at  the  Atlantic  City  Convention  I  was  enthusi- 
astic," says  Elmer  Hamburg  of  Hamburg  Bros., 
Pittsburgh,  Pa.,  "But  my  enthusiasm  didn't  hold 
a  candle  to  that  displayed  at  our  dealer  showings. 
We  got  the  largest  orders  in  all  our  experience." 

"I  was  never  more  surprised  in  my  life,"  says 
Bill  O'Connor  of  Southern  Wholesalers,  Wash- 
ington, D.  C.  "Never  expected  so  much  business. 
But  when  our  dealers  saw  the  RCA  Victors  for 
1939  — they  bought  'em  like  hot  cakes!" 

This  new  RCA  Victor  line  is  packed  with 
profits!  It's  easy  to  sell!  44  outstanding  features 
—  and  sensationally  low  prices — mean  that  this 
is  going  to  be  your  big  RCA  Victor  year. 


MODEL  96K2.  A  radio  set  of 
unusual  beauty,  chock-full  of  fea- 
tures that  make  sales  easy.  Has 
Electric  Tuning  for  6  stations,  3- 
band  Straight-Line  Dial,  Victrola 
Button,  "Plug-in"  for  Victrola 
Attachment,  RCA  Victor  Metal 
Tubes,  and  more  than  10  other 
features.  And  it  sells  at  amazingly 
low  cost. 

Listen  to  the  Magic  Key  of  RCA  every 

Sunday,  2  to  3  P.  M.,  E.  D.  S.  T. 

on  the  NBC  Blue  Network. 


For  finer  radio  performance — RCA  Victor  Radio  Tubes 


RCA  MANUFACTURING  CO.,  INC.,  Camden,  N.  J. 
A  Service  of  the  Radio  Corporation  of  America 


July,   1938 


35 


SALES  FEATURES  AND  SPECIFICATIONS  OF  1938-39  FARM  SETS 

Complete  information  on  battery  operated  sets  compiled  by  Radio  Today 


List 
price 

Cabinet 

Number 
tubes 
Wave       (RMA 

bands     tit-fin. 

Bal- 
last 
resis- 
tor 

Output           Spkr. 

Cond.     size 

gang     Watts    Class      & 
sections  (max)    amp.    type 

Tone 
con- 
trol 

Fil. 

volts 

Stor. 
batt. 
amps. 

Battery  Drain 

Auto  Tuning 

Model 
No. 

Style         Ma- 
terial 

"A"     "B"         "B" 

amps,  volts     mils 

Type  No  of    Inated 

stations    dial     AVC 

I.F. 
Peak 

Emerson  Radio  &  Phonograph  Corp.,  Ill  Eighth  Ave.,  New  York,  N.  Y 
AJ-149  $19.95*    FT  Plastic       B  5-G  None  2 

AJ-192  24.95*    FT  Wood        B  5-G  None  2 

AF-179  39.95*    FT  Wood        B,S  7-G  ind.  ballast  3 

AS-179  39.95*    FT  Wood        B.S  6-OG       None  2 


39.95*    PORT     Wood 


K 
K 

IK 


'Emerson" 

A         6K-PM 


Espey  Mfg.  Co.,  Inc.,  67  Irving  PI.,  New  York,  N.  Y.- 
641  $19.95      FT  W  B  4-G 


"Espey" 

None 


General  Electric  Co.,  1285  Boston  Ave.,  Bridgeport,  Conn. — "G-E" 
FB-52  $19.95*    VT  Wood        B.S  5-0  None 

FB-56  29.95*    CON       Wood        B.S  5-0  None 

FB-72  29.95*    VT  Wood        B.P.S      7-0  None 

FB-76  39.95*    CON       Wood        B,P,S      7-0  None 


1.6 
1.6 


6K-PM 
6K-PM 
6K-PM 
6K-PM 

5-PM 


6K-PM 
8-PM 
8-PM 
12-PM 


None 

None 

Step 

Step 

None 

None 

Step 
Step 
Step 
Step 


2 

2  

2  

6  or  32  2K 

2  


.42 
.42 
.48 


135 
135 
135 


16-18 
16-18 
13-17 


135       16-18 


f  This  current  drawn  from  2  cells  of  a  storage  battery  when  "B"  voltage  is  obtained  from  a  power  adapter  instead  of 


1.7#  .42 
1.7f  .42 
1.7#  .66 
1.7#  .66 
'B"  batteries. 


Grebe  Mfg.  Co.,  Inc.,  119  Fourth  Ave..  New  York,  N.  Y— "Grebe" 

2B2L              NS           FT           Wood        B.S  6-0  None  2  IK  B  6M-PM  Var 

2B2T               NS           VT           Wood         B.S  6-0  None  2  IK  B  6K-PM  Var 

2B2-1              NS          CON       Wood        B.S  6-0  None  2  IK  B  8-PM  Var 

2B2-L             NS          FT           Wood        B,Pi,S  7-0  None  3  IK  B  8-PM  Var 

3B2-3              NS          CON       Wood        B.Pi.S  7-0  None  3  IK  B  8-PM  Var 
1  All  models  available  for  6-volt  operation. 

Howard  Radio  Corp.,  1735  Belmont  Ave.,  Chicago.  111. — "Howard 


21 

21 
21 
21 
21 


NS 

NS 
NS 
NS 
NS 


135 
135 
135 
135 


135 
135 
135 
135 
135 


26 
26 

22-45 
22-45 


NS 
NS 
NS 

NS 
NS 


None 
None 
None 
None 
None 


None 
None 
None 
None 


None 
None 
None 
None 
None 


No 

Yes 

455 

No 

Yes 

455 

No 

Yes 

455 

Yes 

Yes 

455 

No 

Yes 

455 

Yes 


No 

Yes 

465 

No 

Yes 

465 

Yes 

Yes 

465 

Yes 

Yes 

465 

Yes 

Yes 

456 

Yes 

Yes 

456 

Yes 

Yes 

456 

Yes 

Yes 

456 

Yes 

Yes 

456 

4B                   NS 

VT 

Wood 

B 

4-0 

None 

2 

M 

A 

5-PM 

Step 

2 

.25 

90 

12 

None 

No 

Yes 

465 

L'Tatro  Mfg  Co.,  417  W.  Water  St.,  Decorah,  Iowa— "L'Tatro" 
OQ-29           S19.95      VT           Wood        B             4-GO       None 
AQ-69             39.95      HT          Wood        B,Si         5-OG       None 
BQ-69             65.95      CON       Wood        B.Sj         6-OG       None 
NQ-69            39.95      VT          Wood        B             5-OG       None 
BQ-69             49.95      CON       Wood        B             5-OG       None 

2 
2 
2 
3 
3 

1.2 
1.2 
1.2 
1.2 

A 

A 
A 
A 
A 

6-PM 

6-PM 

10-PM 

8-PM 

10-PM 

Step 
Step 
Var 
Step 
Step 

2 
6&AC 
6&AC 

6 

6 

1.9 
2.3 

1.7 
1.7 

.36 

90 

18 

None 
None 
None 
None 
None 

No 
Yes 
.  Yes 
Yes 
Yes 

Yes 

Yes 
Yes 
Yes 
Yes 

456 
456 
456 
175 
175 

CQ-69              99.95 
LQ-39              39.95 
DQ-39             49.95 
EQ-39              65.95 
FQ-39              99.95 

CON 

VT 

HT 

CON 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B,P,S 

B 

B.Si 

B,Si 

B.P.S 

7-0 
6-G 
6-G 
6-G 
8-G 

None 
None 
None 
None 
None 

3 
3 
2 
2 
3 

3K 
1.8 
1.8 
1.8 
12 

B 
A 
A 
A 
B 

12-PM 

6-EE 

6-PM 

10-PM 

12-PM 

Var 
Step 
Step 
Var 
Var 

6 

32 

32 

32 

32&AC 

2.5 

1.2 

1.23 

1.23 

1.55 

Ct 

None 

None 

None 

Ct 

5 
"5' 

Yes 
Yes 
Yes 
Yes 
Yes 

Yes 
Yes 
Yes 
Yes 
Yes 

460 
175 
456 
456 
460 

GQ-89              19.95 
HQ-39             19.95 

VT 
VT 

Wood 
Wood 

B 

B 

4-0 
NS 

None 
None 

2 
2 

.2 

.45 

A 
A 

6-PM 
6-EE 

Step 
Step 

1.4 
32 

i.25 

.25 

90 

10K 

None 
None 

No 
Yes 

Yes 
Yes 

456 
456 

Noblitt-Sparks  Ind 
518B              $34.95 
578B                19.95 
617B                39.95 
627B                49.95 
618B               29.95 

ustries 
FT 
FT 
VT 
CON 
FT 

,  Columbus,  Ind. — 
Wood         B,S 
Wood         B 
Wood         B.P.S 
Wood         B.P.S 
Wood         B 

'Arvin" 
5-0 
4-0 
6-G 
6-G 
6-G 

None 
None 
None 
None 
None 

2 
o 
3 
3 
2 

1.2 
.3 
2 
2 

K 

A 
A 
B 
B 

A 

6-PM 

6-PM 

8-PM 

10-PM 

6-PM 

Var 

None 

Var 

Var 

None 

6 
2 

6 
6 
2 

1.3 

2.7  ' 
2.7 

.36 

.54 

90 
90 

14" 
18" 

None 
None 
None 
None 
None 

Yes 
No 
Yes 
Yes 
No 

Yes 
Yes 

Yes 
Yes 
Yes 

455 

455 
455 
455 
455 

628B                 44.95 
638B               54.95 

CON 
CON 

Wood 
Wood 

B 
B 

6-G 
6-G 

None 
None 

2 
2 

k 
k 

A 
A 

8-PM 
8-PM 

None 
None 

2 
2 

.54 
.54 

90 
90 

18 
18 

None 
None 

No 
No 

Yes 
Yes 

455 
455 

Philco  Radio  &  Television  Corp.,  Tioga  &  C  Sts..  Philadelphia,  Pa., 
39-70B           $24.45*     VT           Wood         B              4-0           None 
39-70F            34.95*    CON       Wood        B             4-0          None 
39-75T            29.95*    FT           Wood        B             4-0          None 
39-75F             44.95*     CON        Wood         B              4-0          None 
39-80B             42.50*     VT           Wood         B              4-0           None 

—"Philco' 

2       NS 
2       NS 
2       NS 
2       NS 

2       NS 

A 
A 
A 
A 
A 

5J4-PM 

8-PM 

5K-PM 

8-PM 

5H-PM 

None 
None 
None 
None 
None 

IK 

IK 

ik 

IK 

IK 

.25 

.25 
.25 
.25 
.2 

90 
90 
90 
90 
90 

8-8K 
8-8K 
8-8K 
8-8K 
6-6K 

None 
None 
Mech 
Mech. 
None 

"0' 
6 

No 
No 
No 
No 

No 

Yes 
Yes 
Yes 
Yes 
Yes 

470 

470 
470 
470 
470 

39-80XF         59.95* 
39-85B             52.50* 
39-85XF         69.95* 

CON 

VT 

CON 

Wood 
Wood 
Wood 

B 

B,S 

B,S 

4-0 
4-0 
4-0 

None 
None 
None 

2 

2 
2 

NS 
NS 
NS 

A 
A 
A 

6M-PM 
5^-PM 
6K-PM 

None 
None 
None 

Hi 

w 

IK 

.2 
.2 
.2 

90 
90 
90 

6-6K 
6-6K 
6-6K 

None 
C&It 
C&It 

6 

No 
No 
No 

Yes 
Yes 
Yes 

470 
470 
470 

Pilot  Radio  Corp.,  3706  36th  St.,  Long  Island  City.  N.  Y 
XG56            $74.50*    VT          Wood        B,S          5-G 
XG5206          76.50*    VT          Wood        B.S          5-G 

.—"Pilot  Radio 

None             3 
None              3 

3 
3 

A 
A 

8-PM 
8-PM 

Var 
Var 

6 
32 

4.5 
NS 

None 
None 

Yes 
Yes 

Yes 
Yes 

455 
455 

RCA  Mfg.  Co.,  Inc. 

94BT             $19.95* 
94BT6             29.95* 
94BK              36.95* 
8QB                89.95* 
8QBK           115.00* 

,  Front  &  Cooper  St.,  Camden,  N.  J.- 
VT           Wood         B              4-0 
VT           Wood         B              4-0 
CON        Wood         B              4-0 
VT          Wood        B,St,S      8-0 
CON       Wood        B.Si.S      8-0 

-"RCA-Victor' 

None             2 
None              2 
None             2 
None             3 
None             3 

.3 
.3 

2.8 
2.8 

A 
A 
A 
B 
B 

5-PM 
5-PM 
6-PM 
8-PM 
12-PM 

None 

None 

None 

Var 

Var 

2 

6 

2 

6&AC 

6&AC 

2.8  ' 

3.3  ' 

3.3 

.36 
.36 

90         12-18 
135'       17' 

None 
None 
None 
None 
None 

Yes 
Yes 
Yes 
Yes 
Yes 

Yes 

Yes 
Yes 
Yes 
Yes 

455 

455 
455 
455 
455 

Sentinel  Radio  Corp.,  2222  Diversey 
118BT           $18.95       FT           Plastic 
118BCT          34.45       CON        Wood 
127BT            27.95      FT           Wood 
127BC             39.95       CON        Wood 
119BT            24.95      FT          Plastic 

Pky.,  Chicago,  111.— 
B             4-0 
B              4-0 
B              4-0 
B              4-0 
B              4-0 

-"Sentinel 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

.2 
.2 
2 
.2 

A 
A 
A 
A 
A 

5-PM 
8-PM 
6-PM 
8-PM 
5-PM 

None 
None 
None 
None 
None 

1.4 
1.4 
1.4 
1.4 
6 

1.8  ' 

.2 
2 
.2 
.2 

90 
90 
90 
90 

8 
8 
8 
8 

None 
None 
Mech 
Mech 
None 

"i' 
4 

No 
No 
No 
No 
Yes 

Yes 

Yes 
Yes 
Yes 

Yes 

455 

455 
455 
455 
455 

119BCT          39.95 
130BT             34.95 
130BC             49.95 
143LT             44.95 
143LC             59.95 

CON 

FT 

CON 

FT 

CON 

Wood 
Wood 
Wood 
Wood 
Wood 

B 

B.S 
B.S 
B,S 
B.S 

4-0 
5-0 
5-0 
6-0 
6-0 

None 
None 
None 
None 
None 

2 
2 
2 
2 
2 

.7 

.7 

K 

K 

A 
A 
A 
A 
A 

8-PM 
6-PM 
8-PM 
6-EE 
8-EE 

None 

Var 

Var 

Var 

Var 

6 
6 
6 
32 
32 

1.8 

1.95 

1.95 

1.05 

1.05 

None 
Mech 
Mech 
Mech 
Mech 

"4' 
4 
4 
4 

Yes 
Yes 
Yes 
Yes 
Yes 

Yes 
Yes 
Yes 
Yes 
Yes 

455 
455 
455 
455 
455 

144XT             44.95 
144XC             59.95 

FT 
CON 

Wood 
Wood 

B.S 
B,S 

5-0 
5-0 

None 
None 

2 
2 

.8 
.8 

A 
A 

6-PM 
8-PM 

Var 
Var 

6&AC 
6&AC 

1.95 
1.95 

Mech 
Mech 

4 
4 

Yes 
Yes 

Yes 
Yes 

455 
455 

Stewart-Warner  Corp.,  Chicago,  111.— 
1901                 NS           FT           Wood 
1905                NS          CON       Wood 
1911                NS           FT           Wood 
1915                NS          CON       Wood 
1921                NS          FT           Wood 

—"Stewart- Warner" 

B,S          4-G          1 
B.S          4-G          1 
B             5-OG       None 
B             5-OG       None 
B.P.S      6-OG       None 

9 

2 
2 
2 
3 

K 
K 
K 
K 
1.3 

A 
A 
A 
A 
B 

6-PM 
8-PM 
6-PM 
8-PM 
6-PM 

NS 
NS 
Yes 
Yes 
Yes 

2 
2 
6 
6 
6 

2.5  ' 

2.5 

2.5 

.5 
.5 

13 
13 

5       19 
>       19 

None 
None 
None 
None 
None 

NS 
NS 
Yes 
Yes 

Yes 

Yes 
Yes 
Yes 
Yes 
Yes 

NS 

NS 
NS 
NS 
NS 

1925                NS 

CON 

Wood 

B.P.S 

6-OG 

None 

3 

1.3 

B 

8-PM 

Yes 

6 

2.5 

None 

Yes 

Yes 

NS 

Montgomery  Ward  &  Co., 

62-304             NS           FT 
62-435              NS           FT 
62-377              NS           FT 
62-387             NS          CON 
62-280             NS           FT 

619  W.  Chicago  St. 
Wood         B 
Wood        B,S 
Wood        B.S 
Wood         B.S 
Plastic       B 

Chicago 
4-0 
5-0 
7-0 
7-0 
5-0 

III.— "Airline" 

None             2 
None             2 
None             3 
None             3 
None              2 

.14 

.2 

.36 

.36 

.65 

A 
A 
B 
B 

A 

5-Mag 
6-PM 
6-PM 
8-PM 
5-PM 

None 

None 

Var 

Var 

None 

2 
2 
2 
2 
6 

2.1  ' 

.3 

.4 
.48 
.48 

90 
90 
90 
90 

HK-15 
17K 
13-23 
13-23 

None 
Mech 
None 
None 
Mech 

"6' 

e>' 

No 
No 
Yes 
Yes 
Yes 

Yes 
Yes 
Yes 
Yes 
Yes 

456 

465 
456 
456 
465 

62-650              NS 
62-322              NS 
62-422              NS 

CON 

FT 

CON 

Wood 
Wood 
Wood 

B.S 
B,S 
B.S 

6-0 
7-0 
7-0 

None 
None 
None 

2 

3 
3 

1 
.2 
.2 

A 

A 
A 

8-PM 
6-EE 
8-EE 

Var 
Var 
Var 

6 
32 
32 

2.6 
1.5 
1.5 

It 
It 

It 

6 
6 
6 

Yes 
Yes 
Yes 

Yes 
Yes 
Yes 

456 
456 
456 

Zephyr  Radio  Co.,  13139  Hamilton.  Detroit,  Mich.— "Zephyr" 
33B6  $49.95       FT  Wood         B  6-0  None 


*  Less  batteries,     t  With  batteries. 


36 


Index  to  codes  on  pages  16  and  34 


j 


Radio  Today 


PARTS  JOBBER  HOLDS  THE  BAG 

(From  page  22) 

tomers,  in  direct  competition  to  their 
own  dealer  accounts. 

In  connection  with  the  above,  there 
are  many  manufacturers  who  sell  di- 
rect to  the  retailer,  or  direct  to  the 
retail  customer,  in  competition  with 
established  outlets  who  buy  from  them 
in  the  conventional  way.  (Xo  mention 
is  made  of  the  manufacturer  who  con- 
fines himself  strictly  to  a  policy  of 
selling  direct  to  the  retailer  or  to  the 
retail  trade.) 

Give  away  profits 

Mention  should  be  made  also  of  the 
damfool  serviceman  or  retailer  who 
gives  all  his  profit  away  to  his  cus- 
tomer, thus  paving  the  way  for  an  of- 
ficial visit  of  the  sheriff  and  his  co- 
horts. 

There  is,  I  believe,  no  question  in 
the  minds  of  those  who  are  building 
for  permanent  good  of  the  industry, 
as  to  what  should  be  done  about  this 
condition — it  should  be  bitten  off 
short !  As  to  the  means  by  which  this 
may  be  accomplished,  I  believe  that 
hope  lies  in  the  direction  of  such  or- 
ganizations as  the  Radio  Manufactur- 
ers Association,  the  Sales  Manager's 
Club,  the  Eepresentatives,  the  Na- 
tional Radio  Parts  Distributors  As- 
sociation, and  the  Radio  Servicemen 
of  America,  Inc.,  working  together  in 
harmony,  with  a  single  vision  of  what 
should  be  accomplished,  and  a  willing- 
ness to  work  hard  to  achieve  the  de- 
sired results. 

There  is  ample  evidence  that  a  more 
harmonious  accord  exists  between  the 
various  groups  in  this  great  industry 
of  ours,  than  has  existed  at  any  pre- 
vious time  in  its  history.  The  proper 
working  out  of  the  problems  confront- 
ing us  will  take  time,  but  I  believe 
that  concerted  effort  on  the  part  of  the 
better  elements  will  show  larger  re- 
sults, as  indeed  it  has  begun  to  do. 

ZENITH  SCOTCHES  RUMORS 

Commander  E.  T.  McDonald,  Jr., 
president  of  Zenith  Radio  Corpora- 
tion, Chicago,  in  reply  to  questions 
about  rumors  circulating  in  the  radio 
trade  that  Zenith  is  manufacturing 
radios  for  others  or  is  having  its  own 
sets  made  in  other  factories,  branded 
such  reports  as  wholly  false  and  un- 
founded. 

"All  Zenith  radios,"  said  Com- 
mander McDonald  to  Radio  Today, 
"are  made  in  our  own  large  factory, 
and  the  Zenith  plant  is  devoted 
wholly  to  manufacturing  products 
bearing  the  Zenith  name.  We  are 
not  making  radios  or  other  products 
for  anyone  but  ourselves." 


ounclng  the 

RIDER 


X 


Chanalyst 


The  Greatest  Advance  Ever  Made  in 
the  History  of  Servicing  Instruments 


Because  the  Rider  Chanalyst  is  of 
fundamental  design  it  makes  possible, 
for  the  first  time,  receiver  testing  under 
theoretically  ideal  conditions)  It  enables 
you  to  localize  troubles  in  a  particular 
stage  or  part  of  a  receiver  or  amplifier 
with  greater  speed  and  more  efficiency 
than  ever  before,  no  matter  how  compli- 
cated the  circuit  and  regardless  of  the 
number  or  types  of  tubes. 

Testing  with  the  Chanalyst  is  done 
without  the  use  of  adaptors  or  plugs! 
With  the  Chanalyst,  any  serviceman 
can  apply  a  standard,  systematic,  time- 
saving  routine  of  servicing  to  his  work. 
Its  applications  are  so  numerous  it  is 
impossible  to  list  them  all  here.  Follow- 
ing are  a  few  of  the  major  tests  which 
you  can  conduct  with  the  Chanalyst 
WHILE  THE  RECEIVER  IS  IN  NORMAL 
OPERATION: 

1        Trace    passage    of    signal    through    re- 
ceiver   from   antenna   to   speaker   in   r-f, 
i-f  or  a-f  stages,  enabling  you  to  estab- 
lish  points  where  signal   exists,   dies,   becomes 
weakened    or   distorted  and   where   it   takes   on 
hum. 


These  are  but  a  few  of  the  many  uses  for 
the   RIDER   CHANALYST  —  send  today   for 


2  Check  actual  operating  voltages  at  any 
point  in  the  receiver  without  loading 
the  circuit. 

3       Accurately    check    actual    control    volt- 
ages developed  by  the  signal  and  pres- 
ent  at   the   tube   elements — also   without 
interfering    with    the    normal    operation    of    the 
receiver. 

4  Check  frequency  output  of  the  oscilla- 
tor section  in  a  superheterodyne. 


5       Instantly  check  wattage  consumption  of 
the   receiver  during   actual   operation. 

6      Quickly    locate    troubles    in    intermittent 
receivers. 

The  test  channels  available  in  the  Rider 
Chanalyst  provide  a  means  of  separating  a 
complete  receiver  into  five  basic  sections. 
Each  of  these  sections  has  its  own  indicator. 
When  an  intermittent  condition  develops,  the 
indicators  show  the  presence  or  absence  of 
the  signal  in  the  various  sections — the  change 
in  wattage  consumption  and  operating  voltage 
— if  any.  By  interpreting  the  indications — you 
can  localize  the  fault  as  being  in  a  certain  part. 


explanations  of  this  remarkable  ■ 
—  basic  —  new   instrument] 


-  essential 


/ 


SERVICE  INSTRUMENTS,  Inc. 

404    FOURTH    AVE.,    NEW    YORK    CITY 


■  N*»   York  rC- 


vome 


Add, 


ress.. 


July,   1938 


1 
I 
I 

J 


37 


NEW  THINGS 


Latest  news   of  radio   products   from   manufacturers 


Uni-directiona!  mike 

*  Crystal-type  microphone  op- 
erating on  a  new  principle.  Essen- 
tially responsive  only  to  sound  ap- 
proaching from  front  of  unit.  Out- 
put level  of  minus  60  db.  below  one 
volt  per  har.  15  db.  discrimination 
between  sounds  arriving  from  from 
and  rear.  May  be  made  non-direc- 
tional by  tilting  unit.  Model  730A 
Uniplex— list  $29.50  with  cable  and 
plug.  Shure  Bros.,  225  W.  Huron  St., 
Chicago,    111. — Radio   Today. 


Push-button   tube   tester 

*  Dynamic  mutual  conductance 
tube  tester  and  volt-ohm-milliamme- 
ter  unit.  Roller  type  chart  indi- 
cates proper  buttons  to  depress  for 
each  tube  type.  Meter  indicates  tube 
condition  on  illuminated  scale. 
Voltage  ranges  0-10-50-250-500-1,000 
AC  and  DC.  Resistance  measure- 
ments .2  ohms  to  3  megs.  Current 
ranges,  0-10-50-250  mils  DC.  Model 
1616— net  $73.34.  Triplett  Electrical 
Instrument  Corp.,  Main  St.,  Bluffton, 
Ohio — Radio    Today. 


Universal  plate  transformer 

*  Transformer  designed  for  op- 
eration from  6  volts  DC  with  vi- 
brator or  115  volts  AC.  Delivers 
300  volts  DC  at  100  mils  and  recti- 
fier filament  voltage.  Type  465-301. 
Jefferson  Electric  Co.,  Bellwood,  111. 
— Radio  Today. 


Console  recording 
phonograph 

+  Cabinet  model  recording  ma- 
chine. Combination  sound  recorder, 
phonograph,  and  public  address  sys- 
tem, housed  in  walnut  cabinet. 
Handles  up  to  12-inch  records.  Class 
A  amplifier  with  3  watts  output. 
12-inch  high  fidelity  speaker  unit. 
Dynamic  type  of  microphone. 
Presto  Recording  Corp.,  139  W.  19th 
St.,  New  York,  N.  Y—  Radio  Today. 


Dynamic  tube  tester 

+  Tube  checker  providing  dy- 
namic test  of  each  element.  Illumi- 
nated meter  and  dials.  Rotating 
type  of  tube  chart  for  over  350  tubes 
and  150  ballasts,  23-position  switch 
with  manganin  resistors  in  logarith- 
mic taper.  Model  33 — net  $32.50. 
Electronic  Apparatus  Corp.,  814  N. 
Damen  Ave.,  Chicago,  111. — Radio 
Today. 


Vacuum   tube   voltmeter 

+  Combination  circuit  tester  and 
vacuum  tube  voltmeter.  High  ac- 
curacy on  low  range  voltages.  Push- 
button type  switches  provide  rapid 
selection  of  test  and  range  desired. 
Ordinary  tests  of  voltages,  currents, 
resistance,  and  capacity  are  provid- 
ed. Extra-high  range  ohmmeter 
tests  up  to  150  megohms.  Philco  Ra- 
dio &  Television  Corp.,  Tioga  &  C 
Sts.,  Philadelphia. — Radio  Today. 


Rubber-cased  condensers 

■*  Paper-type  by-pass  condensers 
molded  in  live  rubber.  Provide  su- 
perior electrical  characteristics  for 
r.f.  functions.  No  moisture  released 
by  vulcanizing  process.  Also  no 
great  pressures  are  exerted  on  the 
paper  section  during  molding.  Avail- 
able in  capacities  up  to  Vi  mike  at 
200  volts,  1.  at  400,  .05  at  600  and 
.01  at  1000  volts.  Type  88.  Aerovox 
Corp.,  70  Washington  St.,  Brooklyn, 
N.    Y. — Radio  Today. 


Phono  turntables 

*  AC  type  turntable  for  phono- 
graphs and  combinations.  "Even 
Speed"  motor  eliminates  need  of  a 
governor — maintains  uniform  speed 
through  all  variations  of  record 
drag  and  line  voltages.  Laminated 
bakelite  helical  cut  gears  provide 
smooth,  silent  operation.  Available 
with  9,  10  or  12-inch  turntables.  Al- 
liance Mfg.  Co.,  Alliance,  Ohio — 
Radio  Today. 


Tool  kit 

*  Special  kit  of  tools  for  use  in 
installing  and  servicing  the  Philco 
Cool-Wave  air  conditioning  unit. 
Specially  constructed  wrenches  re- 
duce servicing  operations  to  a  mini- 
mum of  time.  Philco  Radio  &  Tele- 
vision Corp.,  Tioga  St.,  Philadel- 
phia, Pa. — Radio  Today. 


Electric  metal  etcher 

+  Etcher  for  permanently  mark- 
ing metal  surfaces  regardless  of 
hardness.  Copper  and  alloy  points 
supplied.  Transformer  has  hi-lo 
switch.  Unit  supplied  complete. 
Ideal  Commutator  Dresser  Co., 
4033  Park  Ave.,  Sycamore,  111.— 
Radio  Today. 


38 


Radio  Today 


Auto  radio  service  lab 

*  Rack  and  panel  type  of  ser- 
vice equipment  selected  for  auto 
radio  work.  Left-hand  section  con- 
tains a  signal  generator,  'scope  and 
frequency  modulator,  and  audio  os- 
cillator. Right-hand  rack  has  a  uni- 
versal speaker,  tube  checker  and 
unimeter  combination,  and  battery 
voltage  control.  Units  easily  re- 
movable  and  interchangeable. 
Clough-B-rengle  Co.,  2815  W.  19th 
St.,   Chicago,  111. — Radio  Today. 


All-purpose  microphone 

*  Microphone  for  all  purposes. 
Output  level  of  — 66  DB.  Frequency 
range  of  40  to  10,000  cycles.  Fur- 
nished in  all  standard  impedances. 
Extremely  small  and  light  in  weight. 
Push-button  type  on-off  switch. 
Locking  plug  and  25-foot  cable. 
Model  5MM.  Universal  Microphone 
Co..   Inglewood,  Cal. — Radio  Today. 


Paging  and  interphone  system 

10-station  system  known  as  Traf- 
fic Signal  model,  because  a  red  lamp 
lights  up  on  master  unit  indicating 
"listen"  and  green  one  indicating 
"talk."  System  is  rated  7-10  watts 
— push-pull  amplifier.  May  be  used 
with  10  sub-stations,  each  having  6" 
p.m.  speaker.  Separate  power  sup- 
ply, giving  low  hum  level.  List, 
$79.50  for  master  unit,  power  pack 
and  one  sub-station.  Regal  Am- 
plifier Mfg.  Corp.,  14  W.  17th  St.. 
New  York — Radio  Today. 


Jaivette  Ttotary  Converters 


FOR  CONVERTING  D.C.  TO  fl.C. 

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acities 1 10  to  3250  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service — 
used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus — in  use  all  over  the  world  • 
WHY  EXPERIMENT  —  INSIST  ON  fl  JANETTE 

ASK    FOR    BULLETIN    13-1 


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WHAT'S  IT  TO  YOU 

.  .  .  that  8  years  ago  Service 
Engineers   started   to   climb   on 

NATIONAL  UNION'S  BAND  WAGON? 


What's  it  to  you?  Just  this.  To- 
day, as  then,  National  Union 
gives  first  consideration  to  the 
needs  of  the  Radio  Service  pro- 
fession .  .  .  studies  your  problem 
.  .  .  does  something  practical 
about  it. 

Think  of  it!  More  than  one  hun- 
dred thousand  pieces  of  neces- 
sary shop  equipment  have  been 
given  to  Service  Engineers  dur- 
ing these  eight  years.  The  men 
who  are  riding  the  N.U.  band 
wagon  have  year  after  year, 
cashed  in  on  the  National  lTnion 
policies  listed  below. 

FREE  EQUIPMENT  FOR  THOSE 
WHO  BUY  N.U.  TUBES  AND  CON- 
DENSERS. 

QUALITY  PRODUCTS  GUARANTEED 
TO  INSURE  CUSTOMER  GOOD-WILL. 


FAIR  PROFIT  MARGINS. 

PRICE  MAINTENANCE  BY  REFUSAL 
TO  SOLICIT  CUT  RATE   OUTLETS. 

FREE  SALES  HELPS  AND  BUSINESS 
FORMS  CREATED  TO  SELL  SER- 
VICE. 

Remember  .  .  .  National  Union 
policies  have  been  the  same  for  8 
years.  Your  fellow  Service  Engi- 
neers always  know  where  they 
stand  with  National  Union  ...  no 
wonder  they've  stuck  to  N.U. 
products. 

You  can  have  the  same  profitable 
N.U.  advantages  .  .  .  talk  it  over 
with  a  National  Union  distributor. 

Note:  National  Union  condensers 
(Electrolytic,  Paper  and  the  new  Cera- 
mites)  and  N.U.  radio  tubes  both  help 
you  earn  FREE  EQUIPMENT.  Ask 
your  jobber  how. 


WANT  TO   EXPERIMENT   WITH   TELEVISION? 
You  can  build  your  own  transmitter  and  receiver!    Ask  your  N.U.  job- 
ber  about   N.U.   Television   tube   types   and   free   circuit   information. 


THE     ROAD     TO 
BETTER     BUSINESS 

Pull  guarantee  on     4.   N.U.  jobber  slocks 
highest    quality  are  com ptete . . . No 

"  radio  tubes.  hunting    for    odd 


NATIONAL    UNION    RADIO    CORPORATION 
57  State  Street.    Newark.    N.  J. 


Who   is   my   nearest    N.U.    Distributor? 


Name 
Street 
City... 


July,   1938 


39 


mil 


MORE   NEW  THINGS 


Remote-controlled  amplifier 

*  30-40  watt  amplifier  with  re- 
mote control  of  two  channels.  Con- 
trol circuit  does  not  carry  signal 
voltages — provides  complete  mixing 
and  fading  facilities  at  a  remote 
point.  Cascade  inverse  feedback. 
System  has  two  12-inch  speakers 
with  baffles,  choice  of  microphone. 
Complete  with  all  accessories  Clari- 
on model  C-123  list  $180.40.  Trans- 
former Corp.  of  America,  69  "Wooster 
St.,  New  York,  N.  Y  —  Radio  Today. 


Cathode-ray  picture  tube 

*  Television  tube  with  3-inch 
screen.  Only  12  inches  long.  Stand- 
ard color  is  a  greenish  hue  (others 
on  request).  Two  sets  of  electro- 
static deflection  plates.  Sylvania 
Type  906.  Hygrade  Sylvania  Corp., 
500  Fifth  Ave.,  New  York,  N.  Y.— 
Radio  Today. 


Farm  receiver  kit 

*  All-wave  type  radio  set  for 
farm  use  in  kit  form.  Uses  new  1.4 
volt  low-drain  type  tubes.  Tunes 
540-22,000  kc.  in  3  bands.  R.P.  am- 
plifier on  all  bands.  Tuner  unit  is 
wired  and  aligned  at  factory.  High 
sensitivity  and  fidelity.  Output  of 
240  milliwatts  with  14.6  mils  bat- 
tery drain.  Browning  Labs.,  Main 
St.,  Winchester,  Mass. — Radio  To- 
la y. 


225-watt  rheostat 

*  Vitreous  -  enameled  rheostat 
with  225-watt  rating.  All-porcelain 
and    metal    construction.      Smooth, 


practically  stepless  resistance  vari- 
ation. Large  copper  graphite  sliding 
contacts.  Model  P  is  5  inches  in  di- 
ameter and  2%  inches  deep.  Sup- 
plied with  S^-inch  bakelite  hand 
wheel.  Ohmite  Mfg.  Co.,  4835  W. 
Flournoy  St.,  Chicago,  111. — Radio 
Today. 

Cased  by-pass  condensers 

+  400  and  600-volt  metal-cased 
by-pass  condensers  for  all  receiver 
and  amplifier  uses.  400-volt  units 
same  size  as  usual  200-volt  units. 
Available  in  single  and  multiple 
units  in  a  wide  variety  of  capa- 
cities. Type  CB.  P.  R.  Mallory  & 
Co.,  Indianapolis,  I  n  d.  —  Radio 
Today. 


Beat  frequency  audio 
oscillator 

*  Audio  oscillator  designed  for 
use  by  radio  servicemen.  Output  of 
30  to  15,000  cycles  with  distortion 
of  less  than  5  per  cent.  Plus  or 
minus  1  DB  from  30  to  10,000 
cycles.  Down  2  DB  at  15,000  cycles. 
Large,  easy-to-read  dial.  AC  operated 
— uses  metal  tubes.  Model  154 — net 
149.95.  RCA  Mfg.  Co.,  Front  St., 
Camden,  N.  J. — Radio  Today. 


High-fidelity  receiver 

*  Quality  console  receiver  hav- 
ing an  acoustic  range  of  from  30 
to  8,000  cycles  which  is  substan- 
tially flat.  Output  of  8  watts  with 
less  than  2  per  cent  distortion.  Bass- 
reflex  acoustic  system  employed. 
Push  button  tuning  for  20  stations. 
Superhet  circuit.  12-inch  speaker 
unit.  Model  PD-88— list  $155.  Pier- 
son  DeLane  Co.,  2345  W.  Washing- 
ton Blvd.,  Los  Angeles,  Cal. — Radio 
Today. 


Lafayette  binaural  sound 
systems 

*  Three-dimensional  sound  sys- 
tems using  two  complete  sound  sys- 
tems. Each  amplifier  has  its  own 
microphone  and  pair  of  high-fidelity 
speakers,  each  mike  and  associated 
speakers  being  placed  on  opposite 
sides  of  stage.  Available  in  dual 
25-35,  30-40,  and  40-45  watt  systems. 
Wholesale  Radio  Service  Co.,  100 
Sixth  Ave.,  New  York,  N.  Y  —  Radio 
Today. 


Hamband  switches 

*  Ceramic  -  insulated  switches 
for  amateur  transmitters.  Heavy 
silver-plated  current  carrying  parts. 
Convenient  contact  spacing,  continu- 
ous rotation.  Smooth  wiping  action 
keeps  contact  clean.  P.  R.  Mallory 
&  Co.,  Indianapolis,  Ind. — Radio 
Today. 


I.R.C.  attenuator 

*  20-step  attenuator  using  a 
molded  commutator  with  conduct- 
ing segments  of  polished  copper. 
Multi-finger  beryllium  copper  con- 
tact and  spiral  spring  connector  re- 
sult in  an  extremely  low  noise  level 
of  — 150  DB  which  is  maintained  in 
service.  Wire-wound  resistors  in 
low-resistance  attenuators,  while 
insulated  metallized  resistors  are 
used  for  high-impedance  circuits. 
0  to  45  DB  attenuation  In  2-%   DB 


steps,  tapering  to  infinity  in  tne  last 
two  steps.  International  Resistance 
Corp.,  Philadelphia,  Pa. — Radio  To- 
day. 


40 


Radio  Today 


Here's  the  new  Andrea  "Studio  Tone" 
combination,  with  push  button  tuning, 
Easy-View  Dial,  silent  self-starting 
motor,  studio  type  "Climate  Sealed" 
pick-up,  automatic  stop,  etc. 


MEISSNER  BUYS  VIBRATOR 
DIVISION  OF  ELECTRONIC  LABS 

Announced  late  last  month  was  the 
purchase  of  the  Auto  Radio  Replace- 
ment Vibrator  Division  of  Electronic 
Laboratories,  Indianapolis,  by  the 
Meissner  Mfg.  Co.,  Mt.  Carmel,  111. 
Vibrator  equipment  of  the  former  firm, 
and  many  of  the  personnel  in  that  di- 
vision will  be  moved  to  Meissner  fac- 
tories at  Mt.  Carmel,  where  a  new 
Meissner-Electronic  vibrator  will  be 
manufactured. 

Vice-president  G.  V.  Rockey  of  Meiss- 
ner said  that  his  company  has  long 
experimented  in  the  vibrator  field  and 
after  a  recent  survey  decided  to  pur- 
chase the  best  outfit  in  the  country,  in 
that  line.  Meissner  developments  will 
be  added  to  those  of  Electronic  Labs 
in  the  production  of  the  new  products. 

President  Norman  R.  Kevers  of  the 
Indianapolis  company  announced  that 
his  firm  will  now  concentrate  on  the 
production  and  sale  of  heavy  duty  vi- 
brators, converters,  and  power  sup- 
plies for  all  types  of  applications. 


RURAL  METER 


Factory  and  sales  offices  for  a  new 
firm,  Stark  Electrical  Instruments, 
have  been  established  at  418  S.  Wells 
St.,  Chicago.  After  three  years  of  con- 
sistent success  in  Canada  and  other 
markets,  the  company  enters  the  U.  S. 
radio  field  with  its  Rural  Meter,  a  com- 
bination battery  operated  tube  tester 
and  analyzer  designed  for  servicemen 
operating  in  unelectrified  areas.  Of- 
ficers are  Allen  Stark,  director  of  sales 
and  promotion,  and  Hugo  Nevard,  in 
charge  of  production  and  management. 

Stark  officials  predict  a  definite  place 
in  the  American  radio  field  for  service 
instruments  with  self-contained  power 
supply. 


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on  the  new  UniveX   Iris  Camera. 

Name     


Address 
City 


July,   1938 


41 


DYNATESTING  THE  AUDIO  STAGES 

Checking  for  distortion  and  frequency  discrimination 


By  VINTON  K.  ULRICH, 
(.Service  Editor,  Radio   Today) 

Knowing  that  a  particular  part  or 
stage  of  the  radio  set  is  in  perfect  con- 
dition is  valuable  information — for 
with  such  knowledge  time  is  not  wast- 
ed in  making  separate  tests  of  the 
various  component  parts  in  that  par- 
ticular section. 

In  dynamic  testing,  the  first  step  is 
to  establish  whether  or  not  the  section 
under  test  is  working  properly.  As 
has  been  explained  in  previous  articles, 
it  is  the  author's  preference  to  work 
from  the  speaker,  backward  to  the 
antenna  circuit  taking  advantage  of 
the  amplification  afforded  by  circuits 
alreadj'  tested   and  okayed. 

Output  measurements 

For  the  most  part,  the  indicating  de- 
vices or  meters  are  connected  in  the 
output  circuit  of  the  set  and  the  signal 
generating  devices  are  connected  into 
various  parts  of  the  circuits.  This 
month's  discussion  will  describe  some 
of  the  tests  which  are  applied  to  the 
output  stage  of  the  radio  set. 

As  definite  measurements  are  de- 
sired, rather  than  just  maximums  such 


Pig.  2.    A  push-pull  stage  requires  the  use  of  an  audio  oscillator  with  a  push-pull 
or  center-tapped  output.    Power  output  is  calculated  from  the  AC  voice  coil  resist- 
ance and  voltage  across  it. 


Fig.    1    shows    how    connections    are 
made  to  a  single-ended  amplifier. 


as  are  used  when  aligning  sets;  one  of 
the  first  requirements  is  that  the  out- 
put meter  be  independent  of  frequency 
up  to  about  5,000  cycles  for  ordinary 
sets.  This  requirement  is  met  by  most 
of  the  quality  copper-oxide  type  output 
meters  when  used  ivithout  the  series 
DC  voltage  blocking  condenser.  A  vac- 
uum tube  voltmeter  is  ideally  suited 
for  output  measurements. 

For  checking  waveform  there  is  no 
instrument  as  handy  as  the  cathode-ray 
oscilloscope,  yet  much  can  be  done 
without  it  by  merely  using  one's  ear 
to  tell  when  the  distortion  becomes  ex- 
cessive. If  the  serviceman  has  a  'scope, 
so  much  the  better. 

Single-ended  amplifiers 

The  schematic  of  the  usual  single- 
ended  amplifier  is  shown- in  Fig.  1-a, 
for  the  purpose  of  showing  how  to 
make  connections  for  a  simple  fre- 
quency response  test  and  a  harmonic 
distortion  test.  When  the  grid  is  at 
ground  potential  (cathode  bias)  the 
audio  signal  generator  can  be  connect- 
ed directly  to  point  "A".  The  output 
meter  is  connected  across  the  voice  coil 
so  as  to  avoid  the  need  of  a  DC  block- 
ing condenser  and  also  to  take  into  ac- 
count the  presence  of  the  output  trans- 
former. 

The  audio  generator  is  connected 
through  a  blocking  condenser  as  shown 
in   Fig.   1-b  when   the  grid   is  negative 


with  respect  to  the  chassis.  This  block- 
ing condenser  is  essential  to  avoid 
shorting  out  the  grid  bias  of  the  am- 
plifier under  test. 

Connections  to  push-pull 
amplifiers 

With  push-pull  type  amplifier  the 
connections  are  much  the  same  as 
shown  in  Fig.  2.  The  oscillator  out- 
put must  be  center-tapped"  in  order  to 
provide  equal  and  oppositely-phased 
voltages  for  each  tube.  As  with  single- 
ended  amplifiers,  a  blocking  condenser 
must  be  used  if  the  grid  is  not  at  the 
same  potential  as  the  chassis. 

A  check  of  the  audio  frequency  char- 
acteristic of  the  amplifier  is  made  by 
varying  the  frequency  of  the  audio 
oscillator  and  noting  the  output  meter 
reading.  Just  what  the  results  will  be 
are  largely  dependent  upon  the  price 
class  of  the  set.  Also  in  superhets,  it 
should  be  remembered  that  I.F.  will 
not  pass  extremely  high  frequencies, 
so  if  the  audio  does  not  have  much 
high  response  it  is  not  usually  serious. 
In  Fig.  3  are  shown  the  over-all  fre- 
quency responses  of  typical  $25  and 
$100  sets — the  latter  being  a  console. 
Note  that  the  more  expensive  set  has  a 
slightly  rising  response  at  the  bass  end 
while  the  $25  set  has  a  falling  bass 
characteristic.  Generally,  these  tests 
are  made  at  a  fairly  low  power  output. 

At  100  cycles  the  response  of  the 
cheaper  set  is  off  6  DB  or  50  per  cent 


42 


Radio  Today 


of  the  400  cycle  value — however,  this 
is  quite  normal  and  makes  little  dif- 
ference in  the  tonal  quality  since  a 
small  speaker  unit  is  employed.  If 
more  bass  were  present,  the  speaker 
couldn't  handle  it.  The  larger  set  has 
an  excellent  bass  characteristic  which 
is  without  doubt  better  than  that  of 
the  speaker. 

The  high  freqency  response  of  both 
sets  is  about  average.  Some  of  the 
high-frequency  cut-off  shown  in  Fig. 
3  is  due  to  discrimination  of  the  I  .P. 
circuits  since  the  curves  are  for  an 
over-all  test  of  the  set  from  antenna  to 
speaker.  An  audio  test  alone  would 
show  slightly  better  high-frequency 
response.  To  try  to  increase  the  high- 
frequency  response  appreciably  would 
be  rather  absurd  since  the  LP.  ampli- 
fier definitely  limits  the  upper  fre- 
quency that  will  be  passed.  Even  if 
the  audio  end  would  pass  10,000  cycles, 
the  tonal  quality  of  the  set  would  not 
be  improved  unless  the  I.F.  band  width 
could  be  increased. 

While  it  is  somewhat  up  to  the  ser- 
viceman to  use  judgment  in  determin- 
ing what  is  a  satisfactory  frequency 
response,  a  sweep  from  low  frequency 
to  high  frequency  will  show  up  numer- 
ous defects  in  the  set,  speaker,  and 
cabinet.  How  to  locate  the  causes  of 
the  defects  as  they  make  themselves 
apparent  will  be  explained  later. 

Distortion    vs.   power   output 

Distortion  checks  are  somewhat  more 
difficult  than  frequency  response  tests. 
The  requirements,  however,  are  similar 
for  all  radio  sets.  At  low  power  levels 
the  distortion  should  be  extremely  low 
and  with  only  a  slight  increase  at  full 
power  output  of  the  set.  Any  advance 
beyond  the  maximum  "undistorted" 
power  output  will  cause  a  tremendous 
increase  in  the  distortion  which  is  ap- 
parent on  the  oscilloscope  or  to  the  ear. 

What  the  maximum  undistorted 
power  capability  of  the  set  is,  is  de- 
pendent upon  the  output  tubes  and 
operating  voltages.  Manufacturers  of 
radio  sets  generally  rate  their  sets  on 
maximum  power  output  regardless  of 
distortion,  so  it  is  necessary  to  scale 
that  figure  down  when  making  actual 
power  measurements.  Taking  into  ac- 
count the  losses  in  the  output  trans- 
former and  the  power  overrating,  about 
one-half  of  the  manufacturer's  output 
rating  is  normal  for  the  undistorted 
power  delivered  to  the  voice  coil  of  the 
set.  Or  if  the  manufacturer's  data  is 
not  available,  the  radio  tube  manuals 
state  what  outputs  can  be  expected 
from  the  tubes  under  various  operating 
conditions.  For  example,  a  type  41 
with  250  volts  on  the  plate  is  rated  at 
3.4  watts  for  10  per  cent  distortion. 
Taking  into  account  the  transformer 
losses  and  other  factors,  about  75  per 
cent  of  this  value  will  be  delivered  to 
the  voice  coil  or  about  2V2  watts. 

Power  output  values  are  easily  calcu- 
lated from  the  voice  coil  resistance  and 
voltage  across  the  voice  coil.  The  ef- 
fective AC  resistance  of  the  voice  coil 
is  about  IVi   times  the  DC  resistance. 


And  power  according  to  Ohm's  Law 
equals  voltage  squared  divided  by  the 
resistance.     (At  400  cycles.) 

In  order  to  drive  the  power  output 
stage  to  full  output,  it  is  necessary  to 
have  an  audio  oscillator  that  has  suf- 
ficient voltage  output.  This  means  that 
the  peak  output  of  the  oscillator  should 
be  equal  to  somewhat  more  than  the 
grid  bias  of  the  output  amplifier  in  the 
set.  The  RCA  service  oscillator  used 
in  Radio  Today's  labs  has  somewhat 
less  than  15  volts  r.m.s.  output  and  is 
essentially  constant  over  the  entire 
range.  In  terms  of  peak  voltage,  the 
output  is  about  20  volts,  which  is 
ample  to  drive  pentode  and  beam 
power  output  tubes  to  their  full  out- 
puts. 

increasing  output  voltage  of 
oscillator 

For  triode  tubes  such  as  the  type  45 
and  2A3,  a  voltage  output  of  about  65 
peak  volts  either  side  of  center-tap  is 
necessary.  A  simple  one-stage  ampli- 
fier feeding  into  a  push-pull  input 
transformer  will  provide  sufficient 
voltage  gain  to  drive  all  types  of  tri- 
odes.  If  the  output  of  the  oscillator  is 
center-tapped,  it  is  well  to  use  two 
tubes  in  push  pull  so  as  to  keep  har- 
monic distortion  to  a  minimum.  Ordi- 
nary triodes  of  the  56  and  76  type  are 
suitable.  They  will  provide  a  gain  of 
about  10  in  a  transformer-coupled  stage 
(output). 

If  a  higher  power  and  more  ampli- 
fication is  desired  from  the  oscillator 
(speakers  can  then  be  tested  independ- 
ently of  the  set)  a  triode-type  push- 
pull  power  amplifier  can  be  added, 
making  a  2-stage  amplifier.  Using 
type  45's  the  interstage  coupling  trans- 
former can  be  replaced  by  resistance 
coupling.  A  power  type  modulation 
transformer  or  other  unit  with  a  high- 
impedance      center-tapped      secondary 


should  be  used  to  couple  the  output 
tubes  to  the  circuits  under  test. 

In  our  work  the  output  of  the  RCA 
audio  oscillator  is  fed  into  a  U.T.C. 
type  LS  6A3  amplifier  unit  which  is  a 
push-pull  amplifier  having  6A3  output 
tubes.  A  modulation  type  transformer 
with  a  high  impedance  secondary  wind- 
ing is  employed.  Voice  coil  taps  are 
also  available  in  case  it  is  desired  to 
drive  a  speaker  directly  from  the  am- 
plifier. 

Any  amplifier  that  is  added  to  the 
output  of  the  oscillator  should  have  a 
substantially  flat  frequency  response, 
or  else  the  output  voltage  should  be 
checked  and  maintained  constant  by 
means  of  the  output  control  on  the 
oscillator  unit.  Naturally,  the  audio  in- 
put voltage  to  the  set  must  be  held 
constant,  otherwise  even  a  set  with  a 
flat  frequency  response  would  appear 
to   have   frequency   discrimination. 

When  driving  the  output  amplifier  of 
the  set  to  full  power,  the  output  of  the 
set  should  be  monitored  preferably  by 
a  cathode  ray  oscilloscope  and  when 
the  waveform  becomes  rather  bad,  the 
condition  of  maximum  output  is 
reached.  The  ear  can  also  hear  this 
condition.  The  sound  coming  from  the 
speaker  unit  no  longer  sounds  pure, 
but  it  is  raspy  and  higher-pitched.  The 
power  output  at  this  value  is  easily 
calculated  from  the  formula  previously- 
given. 

If  it  is  found  that  the  output  stage 
delivers  the  required  power  and  passes 
the  necessary  frequencies,  the  test  pro- 
ceeds to  the  preceding  audio  stage  and 
similar  tests  are  made.  The  power 
output  stage  having  been  tested,  is 
used  as  an  amplifier  so  as  to  provide 
easily  measured  voltages  and  wave- 
forms that  can  be  easily  interpreted  by 
ear  or  on  the  'scope.  If  all  the  audio 
stages  are  found  okay,  then  it  follows 
that  the  trouble  lies  before  the  audio 
system. 


Fig.  3.     The  over-all  frequency  response  of  a  typical  $100  all-wave  console  is 

shown  by  the  solid  line,  while  the  dotted  line  shows  the  response  of  a  $25  table 

set.     Note  that  the  main  difference  lies  in  the  bass  frequencies. 


July,   1938 


43 


MORE  NEW  THINGS 


35-watt  sound  system 

*  12-tube,  5-stage  sound  system 
having  a  35-watt  output.  High-speed 
expander,  multi-stage  degeneration, 
and  dual  tone  compensation.  Re- 
mote control.  For  installations  hav- 
ing a  seating  capacity  of  7,000  to 
9,000  persons.  Complete  system  in- 
cludes amplifier,  2  P.M.  speakers 
and  choice  of  velocity  or  dynamic 
mike.  Model  FR-35.  Webster  Co., 
5622  Bloomingdale  Ave.,  Chicago, 
111. — Radio   Today. 


Silvered-mica  condensers 

*  Extremely  stable  condensers 
with  silver  in  molecular  contact 
with  the  mica.  Available  in  capaci- 
ties from  5  to  500  micromicrofarads. 
Tolerances  of  1  per  cent  plus  or 
minus  available.  For  all  R.F.  and 
I.F.  circuits  requiring  a  stable  con- 
denser. Furnished  with  wire  leads 
or  lugs.  Sprague  Specialties  Co.,  N. 
Adams,  Mass. — Radio  Today. 


Radio  chassis  guards 

*  Brackets  for  supporting  any 
type  of  radio  while  doing  service 
work.  Protects  chassis  and  tubes 
in  any  position.  Easy  to  use.  Ad- 
justable to  all  sizes  and  chassis 
heights.  Type  RCG — net  $1.75  per 
pair.  General  Cement  Mfg.  Co., 
Rockford,   111.— Radio  Today. 


Push-pull   vibrator 

*  Vibrator  using  push-pull  prin- 
ciple— reed  is  driven  in  both  direc- 
tions and  an  impact  of  equal  force 
is  obtained  in  both  directions.  Re- 
duces high  voltage  peaks,  provides 
steadier  operation.  R.F.  interfer- 
ence reduced  50  per  cent.  19  re- 
placement types  available — list 
$3.95.  Guaranteed  1  year.  Pauly- 
James  Corp.,  4619  Ravenswood 
Ave.,  Chicago,  111. — Radio  Today. 


Operadio  sound  system 

*  30-watt  portable  type  sound 
system  with  remote  mixer  for  han- 
dling 2  microphones.  Bass  and  treble 
tone  compensators.  Bullet-type  crys- 
tal microphones.  Two  extra-heavy- 
duty  PM  type  speakers  in  infinite 
baffle  type  enclosures.  Controls  are 
fully  protected,  recessed,  and  illu- 
minated. Operadio  Mfg.  Co.,  St. 
Charles,  111. — Radio  Today. 


Rural  Meter  test  instrument 

*  Tube  checker  and  multi-range 
meter  for  use  in  servicing  battery 
type  receivers.  Unit  has  a  self-con- 
tained tube  checker  that  is  indepen- 
dent of  external  power — uses  bat- 
teries. Direct-reading  type  meter. 
Hot  leakage  tests.  Has  DC  voltage 
ranges  of  0-10-100-300.  Resistance 
ranges  0-1M/100M/1  megohm.  Stark 
Electrical  Instruments,  418  S.  Wells 
St.,   Chicago,  111. — Radio  Today. 

Aircraft  receiver 

*  T.R.F.  type  aircraft  receiver 
for  quiet  reception.  Litz-wound 
coils.  May  be  coupled  to  antenna 
with  50  to  250  micromicromike  ca- 
pacity. Tunes  190  to  550  KC.  Dy- 
namotor  type  plate  supply.  Easily 
installed  in  any  plane.  Model  AR-3. 
Simplex  Electric  Co.,  Route  11,  Box 
262A,  Indianapolis.  Ind. — Radio 
Today. 


Adjustable  resistors 

*  Line  of  vitreous  enameled  re- 
sistors with  adjustable  taps.  Units 
available  in  sizes  from  10  to  200 
watts  dissipation.  Double  coat  of 
enamel  insures  complete  protection. 
Resistance  tolerance  of  plus  or 
minus  5  per  cent  is  standard.  Utah 
Products  Co.,  820  Orleans  St.,  Chi- 
cago, 111. — Radio  Today. 


"Round-the-neck"  mike 

*  Crystal-type  microphone  de- 
signed for  hanging  from  neck.  Speak- 
ing horn  increases  output  level  and 
reduces  stray  pick-up.  Unit  is  ex- 
tremely light.  Supplied  with  25-foot 
cable.  Model  211— list  $35.  Sundt 
Engineering  Co.,  4238  Lincoln  Ave., 
Chicago,  111. — Radio  Today. 

Buffer-driver  kit 

■*•  Foundation  kit  for  the  buffer- 
driver  stage  of  an  amateur  trans- 
mitter. Designed  to  simplify  the 
construction  of  "ham"  transmitters. 
Kit  includes  all  hardware  items  and 
Hammarlund  parts  required.  Uses 
a  beam  power  output  tube  having 
40  watts  output.  Type  BD-40.  Ham- 
marlund Mfg.  Co.,  Inc.,  424  W.  33rd 
St.,  New  York,  N  Y—  Radio  Today. 


_.  '.-ft  W 


Stancor  AC-DC  amplifier  kit 

*  Low-priced  amplifier  kit  for 
AC-DC  operation.  Power  output  of  4 
watts  and  gain  of  90  DB.  Push-pull 
beam  power  output  tubes.  Output 
impedances  of  4,  8,  15,  500  ohms. 
Kit  supplied  in  knock-down  form 
with  all  parts  except  tubes.  Model 
11— list  $17.95.  Standard  Trans- 
former Corp.,  1500  N.  Halsted  St., 
Chicago.  111. — Radio  Today. 


44 


Radio  Today 


QUALITY  STANDARD 
OF  THE  RADIO 
INDUSTRY 


COMPLETE  DYNAMIC  TESTING 

STEP-BY-STEP  With  rime-Saving  CATHODE  RAY 


By  Kendall  Clough,  p™.  and  chief  E«g. 


RADIO  X-RAY  LABORATORY 

Slant-Front  Rack,  with  three  panels 
and  reflector,  $29.50.  Rolling  Dolly, 
$14.60.  Top:  OMA  Signal  Generator, 
$64.50  :  Middle,  Graphoscope,  $64.50  ; 
Bottom,  79-C  Audio  Oscillator,  $59.50. 


CUTTING  short  by  hours  the  time 
required  for  receiver  analysis, 
dynamic  testing  claims  the  attention 
of  every  profit-minded  service  man. 

It  is  easily  the  quickest  and  surest  path 
to  the  heart  of  receiver  trouble,  and, 
best  of  all,  it  takes  no  college  degree 
to  learn  and  put  to  work  in  short  time. 

Dynamic  testing  checks  entire  stages  or 
sections  of  a  receiver,  and  furthermore, 
through  easily  recognizable  cathode 
ray  patterns,  not  only  isolates  the  de- 
fect, but  more  often  than  not,  through 
revealing  its  nature,  indicates  source. 

Example:  Assume  there's  distortion  origi- 
nating in  the  AVC  circuit,  audio  amplifier 
or  speaker.  Pick  up  the  diagram  of  any 
modern  receiver  and  see  how  many  points 
have  to  be  identified  and  measured  in  order 
to  come  close  to  a  solution,  and,  further, 
what  a  job  of  identification  this  presents, 
with  the  scanty  information  available. 

Through  dynamic  method,  performed  with 
the  aid  of  time-saving  cathode  ray,  first  the 
speaker  is  checked  as  a  whole,  next  the 
speaker  and  audio  amplifier,  and  third  the 
AVC  system  together  with  the  first  two,  and 
each  time  there  is  obtained  a  plain  "Stop" 
or  "Go"  cathode  ray  pattern  that  tells  at  a 
glance  whether  the  road  is  blocked  and 
where,  or  whether  to  go  ahead. 

There  are  fourteen  Stop-and-Go  lights 
along  the  dynamic  cathode  ray  highway 


running  through  radio  receivers.  Short, 
to-the-point,  easily  understood  direc- 
tions for  setting  them  up  and  following 
them  are  given  in  a  new  booklet,  "Com- 
plete Dynamic  Testing,"  mailed  any- 
where for  50c,  or  supplied  free  to  the 
purchaser  of  any  C-B  instrument. 

A  business-boosting  wall  chart  45" 
long  has  also  been  prepared  of  the 
14-point  dynamic  check-up  chart  be- 
low. Use  it  and  increase  the  size  of 
your  average  service  check  by  $3.50  or 
more.  Mailed  to  registered  C-B  owners 
for  50c.  Over  8,000  now  eligible. 

Dynamic  Testing  with  Time-Saving 
Cathode  Ray  is  your  best  and  cheapest 
road  to  increased  income,  higher  pro- 
fessional standing,  and  better  rates  of 
pay.  The  CIough-Brengle  Co.,  2827  W. 
19th  St.,  Chicago. 


CUT  OUT  AND  NIHIL  TODAY  I 


The  Clough  Brengle  Co., 

2827  W.  19th  St.,  Chicago,  III. 

Enclosed    find     □  Sumps     □  Currency     □  Coin 

Send   □  Complete  Dynamic  Testing  50c 

□  14-Point-Test  Wall  Chart 50c 

Name    .* 

Address 

City  and  State 


July,   1938 


45 


SERVICE  NOTES 


RIDER  GHANALYST 


According  to  John  F.  Rider,  in  whose 
Successful  Servicing  Labs,  the  new  in- 
strument was  developed,  "The  Chana- 
lyst  is,  by  far,  the  greatest  advance 
ever  made  in  the  history  of  servicing 
instruments." 

One  of  the  outstanding  features  of 
this  new  instrument  is  its  fundamental 
design  which  makes  possible  a  new 
and  logical  time-saving  method  of  ap- 
proach in  the  diagnosis  of  all  receiver 
troubles,  regardless  of  make  of  re- 
ceiver, model,  or  the  complexity  of  cir- 
cuits. 

The  basis  of  operation  of  the  Rider 
Chanalyst  embraces  two  major  ideas: 
first,  to  trace  the  passage  of  the  signal 
throughout  the  entire  receiver;  second, 
to  establish  the  true  operating  voltages 
and  the  control  voltages  developed  by 
the  signal — both  without  interfering 
with  the  operation  of  the  receiver. 

The  signal,  fed  into  the  receiver 
through  the  antenna  post,  can  be  traced 
through  the  r-f,  i-f,  and  a-f  channels, 
thereby  making  it  possible  to  establish 
the  points  where  the  signal  exists — 
how  far  it  travels  through  the  set — 
where  it  dies  —  where  it  becomes 
weaker — where  it  becomes  distorted  or 
where  it  takes  on  hum! 

The  design  of  the  Chanalyst  is  such 
that  in  many  cases  an  approximate  di- 


agnosis of  a  fault  in  a  receiver  can  be 
made  from  the  top  of  the  chassis  with- 
out removing  it  from  the  cabinet. 

It  solves  the  problem  of  intermit- 
tents  by  enabling  the  serviceman  to  di- 
vide the  receiver  into  five  basic  di- 
visions and  provides  constant  monitor- 
ing of  the  various  divisions  in  the  re- 
ceiver, including  the  operating  voltage. 
When  the  intermittency  develops,  in- 
terpretations of  the  indications  upon 
the  cathode  ray  tuning  eyes  of  the 
Chanalyst  enable  the  location  of  the 
fault  in  a  certain  part  of  the  receiver. 

The  Chanalyst  includes:  a  calibrated 
r-f  and  i-f  channel,  operative  over  a 
band  between  95  and  1700  kc;  embrac- 
ing all  intermediate  frequencies  used 
in  commercial  receivers;  an  oscillator 
channel  operative  over  a  range  of 
from  600  kc.  to  15  mc.  with  further 
checking  oscillator  operation  up  to  70 
mc;  a  calibrated  a-f  channel  from  50 
cycles  to  50,000  cycles  over  a  range 
from  approximately  0.1  volt  to  1,000 
volts;  and  a  wattage  indicator  from  25 
to  250  watts. 

The  Electronic  Voltmeter  with  a  con- 
stant input  resistance  of  10  megohms 
indicates  voltages  which  are  positive 
or  negative  with  respect  to  ground 
with  no  switching  of  the  leads  because 
of  the  polarity.  Over  the  5-volt  range 
this  input  resistance  is  equal  to  2  meg- 
ohms per  volt.  The  Voltmeter  operates 
over  4  ranges:  — 5  to  zero  to  +5;  — 25 
to  zero  to  +25;  — 100  to  zero  to  +100, 
and  — 500  to  zero  to  +500  volts.    It  is 


capable  of  measuring  actual  values  of 
AFC  and  AVC  control  voltages  right  at 
the  control  grids,  and  all  other  DC 
voltages  in  other  parts  of  the  receiver 
without  loading  the  circuit  to  an  ex- 
tent that  will  interfere  with  the  read- 
ings. 

Jacks  are  provided  so  that  the  sig- 
nal present  in  the  r-f,  i-f,  or  a-f  circuits 
can  be  heard  in  a  pair  of  headphones, 
thus  providing  a  noise  and  hum  check 
in  any  part  of  the  set. 

ANDREA  PUSH-A-BUTTON  CIRCUIT 

Double-throw  push-button  switches 
are  employed  in  the  Andrea  type 
6-D-5  receiver,  which  uses  condenser 
type  trimmers.  The  wave-change 
switch  is  used  also  to  switch  the  cir- 
cuits for  push-button  tuning.  In  the 
push-button  position,  the  2-gang  tuning 
condenser  is  cut  out  of  the  circuit  and 
the  bank  of  trimmer  condensers  sub- 
stituted. 

In  contrast  to  most  push-button  cir- 


SILVERTONE    MODELS  4640,  4650,  4740,  470 
CHASSIS  No.  101.476 


t\2!    KJ 

r 

Si — =±h 

J         ,11    JloSC.SER 
J u     U     600  KC 

Q|RF  I7MC 

C]0              0  |RF  5  MC 
|0              O  |RF  1400  KC 

— r 

I    F     PF&K    4R5  KC 


STAKE     YOUR 

077 


Now!  Bet- 
ter than  ever! 
Each    Meissner 
ELECTRONIC    vi- 
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life-tested  twice — to 
give  you  even  greater  de- 
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efficiency  than  ever  before. 

You  can  stake  your  reputa 
tion    that  —  like    all    Meiss_ 
products  —  each  Meissner   ELEC- 
TRONIC   vibrator    is    built    of    the 
finest    materials    and    with    the    greatest    possible    care    in    the    design    and 
workmanship. 

Make  your  nest  vibrator  replacement  a  Meissner!  Your  parts  jobber  sells  them. 


MANUFACTURING 
CO. 

Mt.    Carmel.    Illinois 


FAMOUS     NAME     FOR     TWO     DECADES 


Wloj  RADIO  TODAY  is  tiu 


•  Highest  percentage  of  subscription 
renewals. 

•  Greatest  increase  in  paid  circulation 
in  the  last  twelve  months. 

•  Only  publication  to  win  two  succes- 
sive surveys  among  large  dealers  to 
determine  reader  preference. 

•  Only  publication  having  the  active 
cooperation  of  400  jobbers  and 
manufacturers  to  build  circulation  on 
a  buying  power  basis. 

•  Most  widely  quoted  radio  trade 
paper. 


22,000  MONTHLY  GUARANTEED 

Member  Audit  Bureau  of  Circulations 


YOU  CAN 
ANSWER  "YES"  TO 
THESE  QUESTIONS 


l. 

2. 
3. 


Have  you  an  established  radio  service  business? 

Is    your    location    free    from    interference    with 
already   established  Tung-Sol   agents? 

Have   you   the   necessary   technical   knowledga 
and  equipment  to  service  radio? 

^     Is  three  months'  supply  a  sufficient  tube  slock? 

Will  you  agree  to  make  a  monthly  stock  report 
on  standard  forms  provided  by  the  wholesaler? 

Will  you  regularly  use  display  and  advertising 
material  furnished  by  us? 

Will   you   maintain   Tung-Sol    established   retail 
prices? 

Have  you  sufficient  capital  to  meet  your  obliga- 
tions promptly  when  due? 


5. 
6. 
7. 
8. 


If  you  can  answer  "Yes"  to  these  questions,  Tung-Sol 
has  a  Consignment  Plan  thai  will  show  you  better  and 
quicker  tube  profit  than   you  ever  thought  possible. 

Look  the  questions  over -and  if  your  answers  are  "Yes" 
-  WRITE  TODAY  for  name  of  your  nearest  wholesaler. 

Dept.  C. 


SALES  OFFICES: 

Atlanta 

•     Boston 

Chicago 

•      Dallas 

Denver 

Detroit 

Kansas  C 

ity     •    Los 

flngeles  • 

New  York 

TUNG-SOL 

^ana-flour  Radio  <3uW 


TUNG-SOL   LAMP   WORKS,   INC. 

Radio   Tube  Division* 


July,   1938 


47 


*Cr»P>leJ7'* 


$A 


P  U  5  H  -  B  U  TT  O  NT  E  S  T I N  G 


Tube  Tester   and   Volt-Ohm-Milliammeter 

Many    Claim    Dynamic    Mutual    Conductance 
.   .   .    Triplett    Positively    Has  It. 

The  hit  of  the  Radio  Parts  Trade  Show  was  this  pace 
setting  push-button  tester  by  Triplett,  with  its  revolu- 
tionary advancements.  After  rotating  chart  to  the  tube  to 
be  tested,  the  button  to  push  is  clearly  marked  under 
each  row.  What  could  be  simpler? 

And  the  Dynamic  Mutual  Conductance  test  for  ampli- 
fiers and  power  tubes  not  only  shows  if  the  tube  is 
GOOD  or  BAD,  but  the  percentage  of  mu  to  the  100% 
Good  Condition  also  is  indicated.  In  critical  sets  this 
permits  the  dealer  to  pick  his  tubes  with  confidence. 
.  .  .  Diodes  and  rectifiers  are  tested  for  emission  accord- 
ing to  the  latest  approved  engineering  standards.  Gas  and 
Ballast    tube   continuity    test    included. 

Filament  location  switch  permits  application  of  filament 
voltages  to  any  prongs  of  the  tube.  The  same  is  true  for 
plate  location,  screen  location,  e.g.  location,  etc.  This 
selective  feature,  together  with  a  spare  socket,  is  an 
anti-obsolescence  factor. 

Rotate  chart  to  Volt-Ohm-Milliammeter  settings — push 
button  for  DC  scales:  0-10-50-250-500-1000  Volts  at 
1000  Ohms  per  Volt;  0-10-50-250  M.A.;  .2  Ohms  to  500 
Ohms  —  300.000  Ohms  —  l'/2  Megohms  —  3  Megohms; 
0-10-50-250-500-1000  AC  Volts  at  400  Ohms  per  Volt; 
decibel  chart  furnished  to  42  db's.  (Ohmmeter  is  line 
powered  and  provision  is  made  for  using  batteries  if 
desired).  Uses  two  interchangeable  plug-in  type  recti- 
fiers, simplifying  replacement  in  case  of  unintentional 
damage.  One  is  in  the  tube  tester  circuit,  the  other  for 
the  Volt-Ohm-Milliammeter. 

Furnished  in  attractive,  all-metal  case  with  lustrous  fin- 
ish. Removable  cover  for  portable  or  counter  use  .  .  . 
sloping    panel. 

MODEL  1615 — Dynamic  Mutual  Conductance  Tube  Tester 
only  with  Push-Button  testing.  Dealer  Price  $63.34 
MODEL    1610 — True    Emission    Type    Tube    Tester    with 

Push-Button  Testing.    Dealer   Price $39.00 

MODEL    1611 — True    Emission    Type    Tube    Tester    with 
Push     Button    Testing    and     Volt-Ohm-Milliammeter. 
Dealer  Price   $49.50 

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SERVICING 


cuits  double-throw  switches  are  em- 
ployed for  the  purpose  of  disconnect- 
ing the  preceding  switches  and  asso- 
ciated wiring.  Position  No.  6  is  the 
button  for  the  highest  frequency,  while 
No.  1  is  for  the  lowest  frequency. 

Since  the  distributed  and  stray  ca- 
pacity is  most  harmful  at  the  higher 
frequencies,  the  switches  are  so  ar- 
ranged as  to  disconnect  the  switches 
for  lower  frequencies.  When  button 
No.  6  is  depressed,  only  trimmer  No.  6 
and  switch  No.  6  are  in  the  circuit. 
In  the  acoempanying  circuit,  switch 
No.  3  is  depressed — note  that  switches 
1  and  2  are  completely  disconnected 
from  the  circuit. 

This  type  of  switching  also  has  the 
advantage,  that  if  two  buttons  are  de- 
pressed at  once,  only  the  trimmer  con- 
denser for  the  higher  frequency  is 
connected  into  the  circuit,  instead  of 
two  trimmer  condensers.  Therefore, 
the  owner  will  always  get  a  station, 
even  if  more  than  one  button  is 
pressed   simultaneously   by   mistake. 


Double  -  throw     type     push  -  button 
switches  are  used  in  the  Andrea  sets. 

The  arrangement  of  switch  contacts 
is  electrically  the  same  as  that  shown 
in  the  circuit  herewith,  but  mechan- 
ically the  arrangement  is  quite  dif- 
ferent. This  particular  electrical  ar- 
rangement was  chosen  to  show  the 
connections  more  clearly. 

While  only  the  antenna  circuit  is 
pictured  in  the  circuit,  a  similar  ar- 
rangement is  used  in  the  oscillator 
circuit. 


VIBRATOR  POWER  SUPPLY  TROUBLES 

A  practical  test  for  vibrator  units  locating 
defects  in  farm  and  auto-radio  power  units 


How  vibrators  work  and  how  to  ser- 
vice the  circuits  involved  is  of  extreme 
importance  to  those  radiomen  working 
on  sets  which  derive  their  plate  voltage 
from  a  storage  battery.  In  the  second 
edition  of  the  Mallory-Yaxley  Radio 
Service  Encyclopedia  much  space  is  de- 
voted to  the  subject  of  vibrators,  part 
of  which  is  quoted  in  the  following 
paragraphs.  In  addition  to  an  analysis 
of  the  important  circuit  features  of  17,- 
000  radio  sets,  there  are  numerous  sec- 
tions devoted  to  charts  and  descrip- 
tions of  vital  radio-set  parts  and  cir- 
cuits. 

The  following  material  outlining 
causes  of  vibrator  troubles  and  describ- 
ing a  practical  vibrator  test  is  from  the 
vibrator  section  of  the  Service  En- 
cyclopedia and  is  reprinted  through  the 
courtesy  of  P.  R.  Mallory  &  Co. 

When  vibrators  were  first  intro- 
duced, servicemen  regarded  them  with 
suspicion  and  uncertainty.  They  were 
inclined  to  attribute  many  auto  radio 
troubles,  such  as  unaccountable  noises, 
low  plate  voltage,  etc.,  to  the  vibrator, 
when  actually  its  operation  was  per- " 
fectly  normal.  The  unquestionable 
proof  of  this  statement  lies  in  the  fact 
that  until  recently,  more  than  one-half 
of  all  vibrators  returned  as  defective, 
were  perfectly  good  in  every  respect. 
Vibrators  can  only  be  damaged  by  two 
causes' 

1.  Serious  overloads  from  short  cir- 
cuits and/or 

2.  Defective  buffer  condensers. 


Rarely  if  ever  do  power  transformers 
give  any  trouble. 

If  vibrator  servicing  problems  are  to 
be  simplified,  specific  troubles  and  the 
recommended  remedy  must  be  shown. 
A  list  of  these  troubles  is  given  along 
with  the  best  way  of  determining  the 
exact  trouble  and  the  method  of  elim- 
ination. 

No  "B"  voltage 

If  the  vibrator  is  operating  and  still 
there  is  no  "B"  voltage,  first  discon- 
nect the  lead  from  the  B-|-  output  of 
the  filter.  If  the  voltage  becomes  much 
higher  than  normal  when  this  lead  is 
disconnected,  the  trouble  is  in  the  radio 
receiver  proper.  The  procedure  fgr 
making  receiver  checks  and  repairs  is 
outlined  in  other  sections  of  the  en- 
cyclopedia. 

If,  after  disconnecting  the  B-(-  lead, 
there  is  still  no  voltage,  the  trouble  is 
in  the  power  pack  circuit.  The  follow- 
ing list  shows  the  probable  defects,  in 
the  order  of  their  importance: 

1.  Shorted  filter  condenser. 

2.  Shorted  buffer  condenser. 

3.  Shorted  rectifier  tube. 

4.  Shorted  "B-j-"  bypass  condenser. 

5.  Grounded  filter  choke. 

6.  Shorted  transformer  secondary. 

7.  Ground  in  wiring. 

If  the  vibrator  does  not  operate,  re- 
move the  vibrator  and  check  for: 

1.  Low  battery  voltage. 

2.  Blown  fuse. 

3.  Burned  switch. 

4.  Broken  "A"  lead. 


48 


Radio  Today 


All  of  these  points  may  be  quickly 
checked  by  measuring  the  voltage  be- 
tween the  center  tap  of  the  transform- 
er primary  and  the  reed  terminal  of 
the  vibrator  socket.  This  voltage 
should  read  5.5  volts  or  more. 

If  the  check  is  satisfactory,  the  vi- 
brator should  be  tested  for  proper  op- 
eration either  in  a  vibrator  tester  or  by 
the  substitution  of  a  new  Mallory  re- 
placement vibrator.  Sticking  or  short- 
ed vibrators  are  usually  caused  by 
"projections"  being  built  up  on  the  con- 
tact points.  These  "projections"  (con- 
tact transfer)  are  the  result  of  an  un- 
balanced condition  in  the  circuit.  A 
careful  check  of  the  "buffer"  condenser 
should  be  made.  If  this  condenser  is 
open  or  the  capacity  not  as  specified,  it 
should  be  replaced  with  a  Mallory  oil 
filled  condenser,  Type  VB  or  OT  having 
the  specified  capacity.  Never  change 
the  specified  capacity  of  this  condenser 
unless  specifically  instructed  to  do  so. 

Low  "B"  voltages 

Check  the  points  given  below  as  the 
cause  for  low  "B"  voltage. 

1.  Battery  voltage  low. 

2.  Corroded  fuse  clips. 

3.  High  switch  resistance. 

4.  Weak  rectifier  tube. 

5.  Defective  buffer  condenser. 
(Caution:    See  preceding  instruc- 
tion on  buffer  condenser  replace- 
ment). 

6.  Defective  filter  condenser. 

7.  Worn  vibrator. 

(Check  in  tester  or  substitute 
new  Mallory  replacement  vibra- 
tor). 

8.  Check  for  troubles  in  radio  which 
will  cause  low  voltage  such  as  shorted 
cathode  resistor,  by-pass  condenser, 
shorted  transformer,  defective  tubes, 
etc. 

Intermittent  operation 

1.  Generally  caused  by  troubles  in 
the  receiver,  such  as  defective  an- 
tenna insulation  or  connections, 
defective  wiring,  defective  tubes, 
etc.     Other  sections  of  the  ency- 


clopedia specifically  explain  this 
method  of  servicing  these 
troubles. 

2.  Intermittent  vibrator  operation 
usually  caused  by  worn  vibrator 
nearing  the  end  of  its  life. 

3.  Loose  connections  in  the  power 
pack. 

4.  Defective  rectifier  tube. 

Unusual  mechanical  noise 

Unusual  mechanical  noise  from  the 
vibrator  may  be  caused  by: 

1.  Vibrator  touching  out  parts  and 
vibrating  against  them  or  caus- 
ing other  parts  to  vibrate.  Cor- 
rect this  trouble  with  a  card- 
board pad  around  the  vibrator. 

2.  An  old  vibrator  nearing  the  end 
of  its  life. 

3.  Loose  case  screws,  or  loose  parts 
in  the  radio  set. 

Electrical  hum  from  speaker 

Hum  from  the  speaker  is  usually 
caused  by: 

1.  Defective  filter  condensers  (low 
capacity). 

2.  Microphonic  tubes. 

3.  Microphonic  condensers. 
(Usually  variable  condenser). 

4.  Loose  chassis  screws. 

5.  Poor  grounds  in  radio. 

Don'ts 

1.  Never  change  the  specified  capac- 
ity of  the  buffer  condenser  (un- 
less circuit  matching  is  carefully 
checked   with   oscillograph). 

2.  Never  attempt  to  repair  a  vibrator. 
Filling  contacts  or  bending 
springs  destroys  the  factory  ad- 
justment which  has  been  carefully 
made  with  expensive  instruments. 

3.  Never  replace  a  vibrator  until  you 
are  sure  it  is  defective. 

4.  Never  hesitate  to  write  Mallory 
for  specific  information  and  help. 

A  practical  vibrator  test,  which  will 
give  the  service  engineer  as  good  an 
indication  of  the  vibrator  condition  as 
the  tube  tester  does  of  tubes,  will  prob- 
ably be  of  extreme  interest  to  many  in 


THE/ffec 

END  LEAD 

(center  lead) 

Centralab  Resistor 


Circuit  of  the  vibrator  tester  suggested  by  Mallory- Yaxley  and  described  on 

these  pages. 


*  TUG-PROOF  ...  a  mighty 
important  reason  for  chang- 
ing to  CENTRALAB'S  new 
Center  Lead  Resistors.  For 
these  new  Fixed  Resistors 
have  their  ends  so  firmly  at- 
tached that  you  will  never  ex- 
perience any  trouble  with 
loose  ends  no  matter  into 
what  "tight  hole"  you  may 
be  forced  to  solder. 

Yes  .  .  .  the  same  strong  ce- 
ramics—hard as  stone  .  .  . 
and  as  impervious  to  mois- 
ture, vibration  and  shock  as 
the  previous  types.  End  leads 
brought  out  through  bakelite 
insulation. 


Baptized  with  fire  at  2500  degrees 
.  .  .  they  are  still  the  best  Resistor 
bet   of   all. 

For  original  equipment  or  re- 
placements .  .  .  select  Centralab's 
new  Center  Lead  Resistors. 

l\otv  available  .  .  .  five  to  a 
card  in  one-half  and  one 
teatt  ratings  .  .  .  100  ohms 
to  5  megohms. 


Centralab 

Milwaukee,  Wis. 

Division   of  Globe    Union,  Inc. 

BRITISH  CENTRALAB.  Ltd., 

Canterbury    Road.    Kilburn 

London,  N.W.6,  England 

FRENCH   CENTRALAB   CO. 

118   Avenue  Ledru-Rollin 

Paris    XI,    France 


July,   1938 


49 


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VIBRATOR  TESTING 


the  service  profession.  Many  inquiries 
have  been  received  for  information, 
which  would  outline  the  proper  method 
of  using  an  oscillograph  for  testing  a 
vibrator.  The  use  of  an  oscillograph 
for  testing  vibrators  is  much  less  valu- 
able than  the  dynamic  characteristics 
of  the  mutual  conductance  method 
would  be  in  testing  tubes.  The  English 
reading  emission  tester  has  become  by 
far  the  most  popular  method  of  testing 
tubes. 

There  are  a  good  many  vibrator  test- 
ers available  but  a  simplified  test 
would  enable  the  service  engineer  to 
find  out  easily  and  rapidly  the  very 
things  he  needs  to  know  about  a  vi- 
brator. Earlier  this  article  pointed  out 
that  vibrators  should  never  need  re- 
placement until  the  contacts  are  worn 
to  such  an  extent  that  the  output  of 
the  power  supply  is  unsteady  or  the 
vibrator  fails  to  start  at  about  5% 
volts. 

The  goodness  of  a  vibrator  may  be 
tested  by  the  value  of  the  starting 
voltage  the  same  as  the  goodness  of  a 
tube  may  be  checked  by  the  value  of 
electronic  emission  from  the  cathode. 

Phrasing  a  vibrator  test  into  Eng- 
lish reading  indications,  vibrators 
which  will  start  at  5.2  volts  or  less  are 
"good"  vibrators  and  will  give  many 
more  hours  of  satisfactory  service.  Vi- 
brators that  start  between  5.2  and  5.6 
volts  are  "doubtful"  vibrators  and  may 
be  expected  to  fail  in  the  near  future. 
Vibrators  that  only  start  above  5.6 
volts  are  "bad"  vibrators  and  may  be 
expected  to  give  immediate  trouble, 
usually  when  the  car  battery  is  low 
and  not  being  charged  by  the  gen- 
erator. 

After  the  starting  tests  are  made,  the 
vibrator  should  be  operated  on  6  to  6% 
volts  with  a  voltmeter  connected  in  the 
output  circuit.  If  the  voltage  fluctuates 
over  a  fairly  wide  range,  the  vibrator 
is  definitely  bad,  but  a  fairly  steady 
output  voltage  indicates  a  good  vi- 
brator. This  test  is  equivalent  to  the 
"short's  test"  of  tube  testers. 

Vibrators  which  have  been  subjected 
to  these  two  tests  may  be  properly 
classified  and  the  good  ones  used  with 
confidence. 

Figure  13  shows  a  typical  circuit  of 
a  tester  which  will  provide  the  above 
tests.      (See   page   49.) 

The  vibrator  is  first  placed  in  the 
proper  socket.  The  voltage  is  then 
adjusted  by  the  potentiometer,  with 
switch  SI  held  in  a  closed  position,  to 
5.2  volts.  Switch  S2  is  then  closed. 
If  the  vibrator  starts,  the  starting  volt- 
age is  5.2  volts  or  less,  indicating  a 
good  vibrator.  If  it  fails  to  start,  open 
switch  2  and  readjust  the  potentio- 
meter to  5.6  volts  and  again  close 
switch  2.  By  adjusting  the  voltage  to 
various  values  and  opening  and  closing 
switch  2  the  exact  starting  voltage  of 
the  vibrator  and  its  corresponding 
condition  may  be  obtained. 


50 


Radio  Today 


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51 


After  the  starting  voltage  of  the  vi- 
brator has  been  obtained,  adjust  the 
potentiometer  so  that  the  voltage  is 
between  6  and  6Vi  volts,  then  observe 
the  output  meter  for  smooth  flow  of 
secondary  power.  The  output  meter 
can  be  calibrated  in  "good"  and  "bad" 
readings  by  using  known  good  and 
bad  vibrators. 

Vibrator  testers  of  this  type  will 
prove  invaluable  since  the  true  condi- 
tion of  the  vibrator  may  be  quickly, 
easily  and  accurately  determined. 

GROUND  CONNECTIONS  ON 
NEW  TYPE  OCTAL  SOCKETS 

When  tracing  the  wiring  in  Stewart- 
Warner  1939  radio  chassis,  it  will  be 
found  that  apparently  certain  socket 
terminals  are  not  connected  to  ground, 
even  though  the  circuit  diagram  shows 
a  ground  connection.  Actually  such  ter- 
minals are  connected  to  a  common 
grounding  lug  which  is  located  be- 
tween the  two  bakelite  wafers  of  the 
socket.  It  is  important  to  remember 
this  fact  when  tracing  the  circuit  wir- 
ing since  if  you  do  not  know  of  these 
internal  connections,  the  circuit  wiring 
may  seem  to  be  incomplete. 


MEN  WHO  ARE  STABILIZING 
RADIO-PARTS  SALES 


(One  of  a  series) 


T~ 

—  CONNECTION  BETWEEN 

W    BAKELITE  WAFERS 

w 

jmfasz 

% 

/  % 

J^HH 

9 

to, 

P          ( 

wk 

^GROUNDING 

v  <^m 

LUG 

D     V 

^ / 

BOTTOM   VIEW 

Sockets  with  the  internal  connections 
can  be  identified  by  the  grounding  lug 
extending  from  the  side  of  the  socket 
(see  diagram).  In  the  chassis  this  lug 
is  always  grounded.  The  bottom  view 
of  the  socket  shows  which  three  ter- 
minals are  connected  to  the  grounding 
lug.  For  most  tubes  these  terminals 
are  the  cathode,  one  side  of  the  heater 
and  the  shield  connection. 

Most  of  the  Stewart-Warner  1939 
A.C.  receivers  use  one  or  more  of  these 
special  sockets,  employing  them  wher- 
ever all  three  of  the  above  terminals 
are  to  be  grounded  to  the  chassis.  Of 
course,  any  wiring  or  other  parts  con- 
necting to  any  of  these  three  socket 
terminals  are  thus  grounded  by  the  in- 
ternal socket  connector. 

+  One  manufacturer  of  small  sets 
cautions  the  serviceman  to  place  the 
back  of  the  receiver  at  least  six  inches 
away  from  the  wall,  etc.,  so  as  to 
allow  free  circulation  of  the  air.  Set 
referred  to  is  an  AC-DC  job  using  a 
plug-in  type  resistor  in  series  with 
filaments.  Seems  that  this  might  also 
apply  to  AC-DC  sets  made  by  other 
manufacturers. 


Leon  Adelman 

Sales  problems  of  the  Cornell-Dubi- 
lier  Electric  Corporation  are  managed 
by  genial  Leon  L.  Adelman. 

At  the  lusty  age  of  nine,  when  most 
moppets  are  falling  off  tricycles,  Adel- 
man was  already  looking  into  the  curi- 
ous workings  of  inductance  coils,  con- 
densers, crystal  detectors  and  aerials — 
with  a  view,  possibly  to  "taking  up" 
radio. 

This  is  significant  because  few  men 
of  his  age — Adelman  is  now  35 — bring 
to  their  job  so  vast  a  fund  of  useful 
experience.  Salesman,  laboratory  as- 
sistant, director  of  publicity,  editor, 
advertising  manager,  sales  manager — 
these  are  satisfactory  careers  in  them- 
selves for  most  men,  but  to  Leon  it's 
all  in  a  lifetime,  and  all  in  radio,  at 
that. 

Those  who  know  him  will  tell  you, 
at  the  drop  of  a  condenser,  of  this 
man's  extremely  likable,  smiling  dis- 
position, of  his  honest,  straightforward 
business  dealings  and  his  genius  for 
hard  work.  And  a  quick  glance  at 
Cornell-Dubilier's  sales  chart  offers  in- 
sight into  the  man's  managing  ability. 

Under  Adelman's  persistent  guiding 
hand,  C-D  jobber  sales  have  skyrock- 
eted. In  1934,  sales  have  doubled  those 
of  '33;  in  1935,  they  were  up  100  per 
cent  again  over  the  previous  year. 
1936  saw  them  shoot  ahead  another 
60  per  cent  and  in  1937,  40  per  cent 
higher. 

Adelman's  formula  for  success  is 
simple.  Work.  If  the  lights  are  burn- 
ing late  in  the  home  office,  you  know 
Adelman  is  in  town,  and  seeing  to  it 
that  every  order  has  been  filled.  Mostly 
though,  he  is  on  the  road. 

As  radio  editor  of  Science  and  In- 
vention and  the  Experimenter;  tech- 
nical editor  of  Radio  News;  contribut- 
ing editor  of  Radio  World  and  associ- 
ate editor  of  Amateur  Radio,  he  worked 
tirelessly  to  keep  interest  alive  in  the 
burgeoning  art  by  spreading  informa- 
tion to  eager  fans  many  of  whom  were 
to  become  foremost  figures  in  radio. 

As  a  counter  salesman  in  radio's 
pinafore  days,  Adelman  learned  first- 
hand the  requirements  of  radio  parts 
buyers  and  dealers.  Later,  as  service 
manager  for  the  F.A.D.  Andrea  Com- 
pany, he  came  to  know  radio  sets  and 


the  importance  of  quality  parts  in 
avoiding  service  troubles. 

From  Fada,  Leon  Adelman  joined 
the  pioneer  Charles  H.  Freshman  Com- 
pany. Next,  he  became  assistant  sales 
manager  of  the  Hammarlund  Manu- 
facturing Company,  Inc.  For  a  time 
after  that,  he  operated  his  own  com- 
pany, Leon  L.  Adelman,  Inc.,  exporters 
and   importers. 

Out  of  this  wide  experience  he  de- 
veloped a  keen  perception  of  modern 
merchandising  principles  and  a  sound 
knowledge  of  the  "radio  game."  To 
quote  Adelman:  "Work  is  man's  salva- 
tion— and  mine!" 


RSA  ELECTS  NEW 
NATIONAL  OFFICERS 

At  the  annual  meeting  of  the  Board 
of  Directors  held  in  Chicago,  June  8, 

1938,  the  following  officers  were  elected 
to  serve  until  June  1939: 

T.  P.  Robinson,  Dallas,  Texas — Pres. 
A.  J.  Theriault,  Cleveland,  Ohio — V-P. 
Donald  H.  Stover,  Freeport,  111. — Sec'y 
Lee  Taylor,  Chicago,  111. — Treas. 

New  Chapters  that  have  recently 
completed  affiliation  with  the  RSA  are 
Alton,  111.;  Quincy,  111.;  Fremont, 
Ohio;  Steubenville,  Ohio;  Ogden, 
Utah;  and  Long  Island,  N.  Y.  In  ad- 
dition to  the  above  Chapters,  Dan- 
ville, 111.;  Cincinnati,  Ohio;  Indian- 
apolis, Ind. ;  and  Tulsa,  Okla.,  are  all 
definitely  considering  affiliation  with 
the  RSA.  We're  growing  and  grow- 
ing! 

Highlights  of  first  RSA 
convention 

After  three  days  of  unremitting  ac- 
tivity, the  Board  of  Directors  of  the 
RSA  completed  the  tremendous  task 
of  revising  the  by-laws,  establishing 
the  Code  of  Ethics,  electing  new  offi- 
cers, and  choosing  an  emblem  and 
slogan  for  the  RSA,  as  well  as  other 
business   of   the   organization. 

After  long  and  serious  deliberation, 
the  Board  of  Directors  fixed  the 
amount  of  the  national  dues  at  three 
dollars    a    year    effective    January    1, 

1939,  in  order  that  members  can  con- 
tinue to  receive  all  of  the  many  bene- 
fits enjoyed  in  the  past  as  well  as  a 
host  of  new  ones  to  be  added  in  the 
near  future,  and  in  order  that  the 
RSA  might  continue  to  be  self-sus- 
taining and  entirely  free  from  any 
subsidy  or  domination.  An  admission 
fee  of  one  dollar  for  1939,  was  also 
agreed  upon. 

Duluth — Duluth  Chapter  voted  u 
have  one  meeting  a  month  during 
the  summer.  A  very  interesting  meet- 
ing was  held  at  which  Mr.  H.  B. 
Eilers  gave  a  very  fine  talk  on 
"Facsimile".  KSTP  in  St.  Paul  is 
on  the  air  nightly  with  a  facsimile 
program. 

Holyoke — A  regular  meeting  was 
held  on  June  15th. 

A  list  of  slow  pay  customers  was 
made  up  and  will  be  distributed  to 
our  members  at  our  first  meeting 
held  in  September. 


52 


Radio  Today 


ABC?  YES  . 
BUT  THAT 
IS  NOT  ALL! 


THE  BIG   THING    IS  COVE 

especially  SUPER   OUTLETS    and 

There  are  61,722  radio  dealers  in  this  country. 

Some  have  difficulty  in  doing  $1,000  yearly  radio 
volume.  Others  do  $1,000,000  with  ease!  Yet  there  is 
nothing  in  a  circulation  audit  to  differentiate  between 
them.  It  becomes  a  question  of  how  much  a  publisher 
knows,  or  is  willing  to  tell,  about  his  circulation. 

Whether  readers  are  "paid"  or  "free"  is  of  no  consequence 
if  they  have  little  or  no  volume.  The  important  thing  is  to 
know  all  that  can  be  learned  about  flow  much  merchandise 
they  actually  sell. 

In  the  very  beginning,  RADIO  TODAY  set  up  its  records 
to  "go  ABC"  at  the  earliest  possible  moment  but  it  also 


RAGE  OF   BUYING  POWER 

ABOVE-AVERAGE  DEALERS 

made  a  capital  investment  of  over  $20,000  in  setting  up  its 
mailing  lists  on  the  basis  of  buying  power. 
For  example,  RADIO  TODAY  secured  the  cooperation 
of  the  two  largest  manufacturers  in  building  the  only  avail- 
able list  of  super  dealers.  This  is  a  group  that  does  over  30% 
of  the  total  radio  volume.  It  is  coverage  that  the  radio 
industry  must  have  and  practically  all  of  them  are  paid 
subscribers. 

The  fact  that  RADIO  TODAY  has  the  only  trade  cir- 
culation actually  built  on  buying  power,  can  be  proved  by 
a  simple  test  that  any  manufacturer  can  make — a  spot  check 
of  readers  in  a  typical  community  or  a  questionnaire- 
survey  to  the  super  dealers. 


THE    RADIO    MARKET   AT   A   GLANCE 


the   entire   trade   buying    power   and 
is  done.  They  clearly  show  the   im- 


These   charts   show 

where  the  volume 

portance  of  the  two  groups  in  which  RADIO  TODAY'S 

circulation  is  largely  concentrated.  There  is  no  other  way  of 


getting  all  that  RADIO  TODAY  gives  you  unless  you  buy 
coverage  of  the  whole  61,722 — which,  of  course,  no 
combination  of  publications  can  give. 


RADIO  TODAY,  Published  by  Caldwell-Clements,  Inc.,  480  LEXINGTON  AVE.,  NEW  YORK 
July,   1938  53 


WHEN  IS  A  TUBE  NOT  A  TUBE? 

Industry  opinion  backs  Radio  Today's  drive  against     dummies 
Supports  proposals  to  apply  RMA  definition  in  describing  sets 


When  Radio  Today  revealed  in  its 
November,  1937,  issue  the  racketeer- 
ing and  misrepresentation  going  on 
in  radio-set  selling,  by  counting 
dummy  resistor  plug-ins  as  legitimate 
tubes,  the  storm  which  broke  in  the 
radio  industry  resulted  in  the  draft- 
ing of  a  definition  of  "what  consti- 
tutes a  radio  tube,"  by  the  engineer- 
ing committee  of  the  Eadio  Manufac- 
turers Association.  This  definition  has 
now  been  formally  approved  by  the 
directors  of  the  RMA.    It  reads: 

"A  radio  tube  is  a  device  used  in 
radio  equipment  in  which  an  electric 
or  magnetic  field  causes  or  controls 
the  electronic  or  ionic  conduction 
through  a  vacuum  or  a  gas.  This  defi- 
nition shall  not  be  construed  to  in- 
clude dial  lamps  used  for  illumination 
only,  ballast  or  other  resistance  de- 
vices." 

With  this  definition  approved  by 
representative  leaders  of  the  radio  in- 
dustry, Radio  Today  in  following  up 
its  own  original  move  to  clear  up 
confusion  of  terms  in  radio-set  sell- 
ing, has  proposed  applying  this  defi- 
nition to  all  descriptions  and  specifi- 
cations of  radio  sets  published  in  its 
pages. 

We  believe  that  it  is  to  the  best  in- 
terest of  the  radio  trade  to  omit  re- 
sistor tubes,  plug-in  resistors,  dummy 
tubes,  etc.,  from  the  tube  count. 

Before  applying  this  definition, 
which  would  mean  that  descriptions 
in  Radio  Today  would  refer  only  to 
"active  tubes"  in  the  set,  the  editors 
have  invited  the  comments  of  repre- 
sentative radio  manufacturers  on  such 
a  move.  A  number  of  these  comments 
follow : 

W.  R.  G.   Baker 
General  Electric  Company 

Regardless  of  whether  or  not  it 
was  a  sound  business  policy,  the  radio 
industry  has  consistently  encouraged 
the  consumer  to  measure  in  some  de- 
gree, the  performance  of  a  radio  re- 
ceiver in  terms  of  the  number  of 
tubes.  If  such  a  "measuring  stick" 
is  to  be  employed,  the  industry  should 
jealously  guard  such  a  standard  and 
it  would  seem  that  the  RMA  defini- 
tion of  a  tube  is  very  definitely  a 
constructive    step    toward    that    end. 


Lewis  M.  Clement 
RCA  Manufacturing   Co. 

We  are  quite  in  agreement  with 
both  the  RMA  and  Eadio  Today's 
policy  on  the  subject  of  not  includ- 
ing "resistor"  tubes  in  the  tube  count 
on  radio  receivers.  Where  we  use 
such  tubes  in  our  present  line  and 
make  mention  of  the  number  of  tubes 
we  say  in  each  case  "a  blank-tube 
set  plus  ballast  tube",  thus  omitting 
the  ballast  tube  from  the  actual  tube 
count. 

We  agree  with  your  stand  and  feel 
that  the  industry  has  been  benefited 
by  your  active  campaign  on  this  sub- 
ject. 

L.   L.  Spencer 
Stromberg-Carlson  Telephone  Mfg.  Co. 

"Allow  us  to  congratulate  you  upon 
your  effort  to  clear  the  radio  industry 
of  one  of  its  worst  evils;  namely,  the 
'Dummy  Tube,'  which  has  been  used 
by  the  unscrupulous  in  the  hope  of 
securing  sales. 

"RMA's  definition  will  be  a  great 
help,  I  hope,  in  clearing  this  menace 
from  the  industry. 

"We  hope  that  you  continue  your 
campaign." 

Powel  Croiley,  III 
The   Croiley   Radio   Corporation 

"We  are  in  accord  with  the  RMA's 
definition  of  a  radio  tube,  and  feel 
that  the  Association  is  doing  its  best 
to  improve  a  situation  which,  in  our 
opinion,  has  been  very  bad. 

"We,  too,  feel  that  it  is  for  the  best 
interest  of  the  radio  trade  to  refer 
only  to  active  tubes  when  describing 
the  number  of  tubes  in  a  radio  set, 
and  are  in  favor  of  your  applying 
the  RMA's  definition  in  this  way." 

G.  W.   Russell 
Electrical  Research  Laboratories,  Inc. 

"We  are  absolutely  in  accord  with 
applying  the  RMA  definition  the  way 
you  contemplate.  But  you  will  find 
that  many  will  list  and  advertise 
7-tube  sets  that  are  using  a  ballast 
tube  as  a  7-tube  set  including  a  bal- 
last tube,  rather  as  referring  to  it  as 
just  a  6-tube  set. 

"We  do  not  agree  100  per  cent  that 
a  ballast  tube  is  not  an  operating  tube, 
particularly    when    used    on    a    2-volt 


battery  set,  as  a  ballast  tube  in  a  set 
of  this  type  really  does  function  and 
perform  a  definite  duty,  but  regard- 
less of  our  opinion  in  this  matter,  we 
will  cooperate  100  per  cent  in  this 
new  ruling." 

Ray  C.  Ellis 
Delco  Radio  Division 
General  Motors  Corp. 

"It  seems  to  us  satisfactory  that  you 
use  the  RMA  tube  definition  for  your 
descriptions  and  specifications  of  ra- 
dio receivers." 

Alan    R.   Tripp 
Pilot  Radio  Corporation 

"We  believe  that  it  would  be  a  step 
in  the  right  direction  to  list  receivers 
of  all  manufacturers  at  the  number  of 
working  tubes  which  they  employ.  Of 
course,  the  success  of  this  scheme 
would  depend  upon  all  publications 
adopting  your  method  of  listing." 

S.  H.  Beebe 
Fada  Radio  and  Electric  Company 

"We  do  not  believe  that  it  will  make 
very  much  difference  what  the  manu- 
facturers do  in  regard  to  the  RMA 
definition,  as  it  is  our  opinion  that 
the  retail  trade  will  continue  to  sell 
six-tube  sets  as  such  if  there  are  six 
articles  in  the  set  that  look  like  a 
tube  to  the  consumer.  If  the  manu- 
facturers of  these  devices  would  stop 
making  them  look  like  a  radio  tube, 
it  might  be  possible  to  educate  the 
retail  trade  accordingly. 

"We  further  believe  that  it  would 
be  desirable  if  all  manufacturers  of 
radio  sets  followed  the  same  practice 
in  their  tube  designations  and  we  are 
heartily  in  favor  of  any  move  in  this 
direction,  provided  it  can  secure  suf- 
ficient support  to  make  the  result 
unanimous  to  all  practical  intents  and 
purposes." 

L.   E.   Murray 
Better  Business   Bureau 

"We  heartily  recommend  the  adop- 
tion of  the  advertising  policy  you  are 
considering  as  regards  tube  and  tube 
complement  designation,  as  well  as 
commend  you  on  the  work  you  have 
been  doing  in  this  respect.  This  sub- 
ject has  been  one  of  vital  interest  to 
this  bureau  for  some  time  as  evidenced 
by  its  bulletins  on  the  subject." 


54 


Radio  Today 


■  -  ■■    /  ■  - 


Sales  force  of  Shure  Bros.,  Chicago,  gather  to  honor  new  lines,  new  plans. 


The  altogether  new  line  of  micro- 
phones and  acoustic  devices  introduced 
by  Shure  Bros.,  Chicago,  got  a  snappy 
reception  last  month  when  the  com- 
pany's representatives  huddled  at  the 
Stevens  Hotel  for  a  special  Representa- 
tives' Luncheon.  Feature  sales  plans 
were  discussed  and  approved  for  the 
new  season.  Shure  officials  and  guests 
are  shown  herewith.  Left  to  right, 
they  are: 

First  row:  Fred  Ptashny,  advertis- 
ing; W.  Sharer,  design;  H.  Teplitz,  ad- 
vertising; R.  M.  Campion,  Dallas;  H. 
W.  Burwell,  Atlanta;  M.  Evander,  en- 
gineering;   R.   Clark,   purchasing. 

Second  row:  H.  S.  Lea,  service  man- 
ager; S.  K.  Macdonald,  Philadelphia; 
M.  A.  Cope,  production  manager;  R.  P. 
Glover,  chief  engineer;  S.  N.  Shure; 
E.  L.  Berman,  sales  manager;  J.  B.  Al- 
bert, assistant  sales  manager;  H. 
Brauer,  engineering. 

Third  row:  F.  Ellinger,  Chicago;  F. 
Hill,  Minneapolis;  J.  P.  Kay,  Tulsa; 
L.  M.  Wood,  St.  Louis;  W.  "Wood,  St. 
Louis;  H.  P.  Hardesty,  Detroit;  J. 
Clawson,  Boston;  J.  C.  Hill,  export 
manager;  B.  Baumsweiger,  engineer- 
ing; H.  Palmleaf,  engineering;  M. 
Steiner,   engineering. 

Fourth  row:  0.  H.  Smith,  Chicago; 
C.  H.  Dolfuss,  Jr.,  Cleveland;  A.  C. 
Simmonds,  Toronto;  W.  H.  Ellinger, 
Chicago;  W.  Davenport,  Detroit;  J.  H. 
Vawter,  Buffalo;  W.  Bert  Knight,  Los 
Angeles;  R.  C.  James,  Jr.,  Seattle; 
A.  Dolnick,  engineering;  F.  E.  Schmitt, 
New  York  City. 

New  representatives  for  Sonora  radio 
and  phonograph  divisions  in  the  south- 
eastern states  are  Brower  Murphy  and 
Jack  Cota,  according  to  news  from 
president  Joe  Oerl  of  Sonora  Radio  & 
Television  Corp.,  Chicago.  Headquar- 
ters are  in  Atlanta,  Ga. 

Also  are  announced  two  new  jobbers: 
Herbert  H.  Home,  Los  Angeles,  for 
Sonora  phonographs  and  combinations 
in  Southern  California;  C.  F.  Sexton 
of  Radio  Products  Sales  Co.,  for  ex- 
clusive distribution  of  Sonora  sets 
throughout  Pacific  Coast  states. 

Mueller  Electric  Co.,  Cleveland,  Ohio, 
now  has  two  new  sales  agents.  Fred 
Somers  of  Kansas  City  will  handle  the 
line  in  Missouri,  Iowa,  Nebraska  and 
Kansas.  Walter  W.  Boyd  of  Chicago 
will  represent  Mueller  in  Illinois  and 
in  eastern  and  southern  "Wisconsin. 
Both  are  seasoned  specialists  in  the 
automotive  and  radio  fields;  both  ex- 
perts in  jobber  service. 


J.  J.  McBride,  Chicago  district  man- 
ager of  National  Union  Radio  Corp., 
announces  the  appointment  of  Fred 
Gusler,  sound  and  radio  tube  expert, 
as  his  assistant.  Mr.  Gusler  has  wide 
experience  in  radio  and  public  address 
work,  having  sold  RCA  products  in  the 
Mid-West  for  many  years. 


Second  meeting  of  the  National  As- 
sociation 0/  Radio  &  Appliance  Re- 
tailers, which  was  scheduled  for  Chi- 
cago early  this  month,  was  postponed 
due  to  the  fact  that  many  dealers  can- 
celled their  trips  to  the  Merchandise 
Mart  for  the  furniture  and  house- 
wares buying  events.  Business  lull 
during  recent  months  was  the  reason, 
but  plans  are  being  made  for  another 
meeting.  Russell  Atkinson.  4  Ralph 
Ave.,  Brooklyn,  N.  Y.,  is  president; 
B.  H.  Poucher,  3930  Lancaster  Ave., 
Philadelphia,  Pa.,  is  executive  secre- 
tary. 


For  Premax  Products,  the  new  repre- 
sentative in  metropolitan  New  York 
and  the  eastern  territory  is  William 
(Bill)  Gold,  72  Park  Place,  New  York 
City.  New  man  for  Premax  in  the  Chi- 
cago area  is  Al  Bruning,  208  N.  Wells 
St.,  Chicago.  The  company  also  re- 
ports unusual  success  at  the  recent 
Parts  Show,  where  the  new  Tri-Bar 
auto  antenna  got  an  exceptional  reac- 
tion; the  Premax  Vertical  Antenna  for 
receiving  purposes  and  the  Vertical  Ra- 
diators for  amateur  transmission  also 
were  applauded. 


Last  month  500  radio  dealers  and 
their  wives  went  to  the  Yorktown 
Heights,  N.  Y.,  estate  of  I.  Goldberg, 
president  of  P(7of  Radio  Corp..  to  see 
new  1939  models  and  to  celebrate  Mr. 
Goldberg's  30th  anniversary  in  the 
radio  and  wireless  field.  Guests  at  the 
big  party  unanimously  applauded  the 
"Rotor-dial"  and  "Piano  Tuning"  fea- 
tures of  the  new  models. 

"Not  a  firecracker  in  a  carload"  is 
the  new  slogan  being  used  by  Cornell- 
Dubilier  Electric  Corp.,  S.  Plainfield, 
N.  J.,  in  order  to  emphasize  the  safety 
factor  in  the  type  BR  "Blue  Beaver" 
electrolytics.  In  the  improved  units 
special  vents  are  used  to  permit  the 
normal  dissipation  of  electrolytic 
vapor. 


Complete 
Electric  Plants 


COMPLETE    POWER    UNITS 

Operating  A.C.  Radio,  PUBLIC  AD- 
DRESS SYSTEMS,  SOUND  CARS, 
MOTION  PICTURE  EQUIPMENT, 
and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Sys- 
tems, Refrigerators,  all  Household  Ap- 
pliances for  FARMS,  CAMPS,  LAKE 
HOMES,  or  STANDBY  SERVICE.  For 
use  anywhere  Power  Line  Current  is 
not  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C.,  6,  12,  32  and  110  Volt, 
D.C.  as  well  as  Combination  A.C.-D.C. 
Units.  Anyone  can  Operate.  COM- 
PLETE, READY  TO  RUN. 

(T  WRITE  FOR  DETAILS  ON  DEALERS'  ]1 
II  PROPOSITION  AND  TERRITORY  Jl 

D.  W.  ONAN  &  SONS 

593  Roy  a  Is  ton  Ave.,  Minneapolis,  Minn. 


DEPENDABLE        RADIO        TUBES 


July,    1938 


55 


Want  to  make  some 
easy  PLUS  profits  on 
an  item  guaranteed  to 
build  big  business  in 
the    future  ? 

Then  Sell 

TELEVISION 

NOW! 


Lee  de  Forest — "father  of  radio" — says 
it's  "lucid,  illuminating,  I  predict  for  it 
many  amazed  readers!" 

Here's  the  one  sure-fire  method  of 
showing  your  customers  that  YOU  will 
be  television  headquarters.  Sell  them 
NOW  the  most  informing  book  on  the 
most  controversial  subject  in  radio — 
the  whole  story  of  sound-and-color 
television,  and  of  the  fights  now  raging 
over  its  patents  and  government  control. 

TELEVISION 

A   Struggle   for   Power 

by  FRANK  C.  WALDROP 
and  JOSEPH  BORKIN 

Introduction   by 
GEORGE    HENRY   PAYNE, 

Member  of  the  F.  C.  C. 

This  big  sensational  book  is  an  easy  plus 
sale  for  every  alert  radio  dealer.  But — 
much  more — it  is  perfect  insurance  for 
your  future.  Every  book  you  get  into  the 
hands  of  a  customer  makes  that  customer 
know  that  you  are  the  up-to-the-minute, 
completely  equipped  source  of  supply 
for  all  radio  interests. 

Get  in  on  the  ground  floor  with  this  hot 
proposition:  A  boost  to  your  radio 
business  today,  a  lever  to  your  television 
business  tomorrow!  Stock  it  NOW. 

TEAR  OFF   HERE 

WILLIAM  MORROW  &  CO.,  Inc. 
386  4th  Ave.,  New  York  City 

Gentlemen:  I  want  to  make  some  easy  plus 
profits  NOW  and  sow  the  seeds  of  future 
television-set  sales.  Send  me  AT  ONCE, 
while   there's   so    much    in   the    papers   about 

television dozen  copies  of  TELEVISION: 

A  Struggle  for  Power,  by  Waldrop  &  Borkin, 
as  a  starter.  Allow  me  your  big  trade  discounts 
as  follows:  12  books  for  $19.80;  24  for 
$38.40,-  48  for  173.92.  (Single  copies  whole- 
sale S1.84.  Retail  price  J2.75.) 

Name 

Firm 

Address 

City State 


"We  plan  to  sell  the  prospect"  is  what  this  Detrola  sales  staff  assures 
president  Jack  Ross.  Sitting,  left  to  right,  Messrs.  Goodman,  Schuster, 
Goodman,  "Jim"  Davin  (sales  mgr.),  Harry  Legg  (asst.  sales  mgr.), 
McCarthy,  McMorrow.  Standing,  Evans,  Harris,  Rusch,  Finger,  Farkas, 
Engel,  Lewis,  Miller,  Brennan.  Divisional  reps  are  now  holding  jobbers' 
dealer  meetings. 


THE  REPRESENTATIVES  GROW 

When  President  Perry  Saftler  called 
to  order  the  annual  meeting  of  "The 
Representatives"  on  June  9  in  Chicago, 
he  found  85  members  there,  represent- 
ing every  section  of  the  U.  S. 

Committee  reports  were  lively;  the 
membership  group  revealed  that  total 
members  now  number  125,  compared 
with  a  total  of  38  when  the  first  meet- 
ing was  held  in  October,  1935.  Present 
membership  covers  all  48  states. 

During  the  past  year,  26  radio  parts 
manufacturers  requested  a  list  of  the 
members  of  the  organization.  Ten  new 
applications  were  filed  by  interested 
representatives  during  the  recent  Chi- 
cago show. 

Besides  President  Saftler,  the  officers 
are  D.  R.  Bittan,  vice-pres.;  and  David 
Sonkin,  220  E.  23rd  St.,  New  York  City, 
secretary-treasurer.  Next  meeting  is 
set  for  September. 

ARCTURUS  HAS  50  SALES  HELPS 

Dealer  and  service  merchandising 
aids,  over  50  of  them  ranging  from  the 
"magic  slate"  advertising  novelty  to 
service  carrying  kits,  window  displays, 
streamers,  etc.,  have  been  announced 
by  Arcturus  Radio  Tube  Co.,  Newark, 
N.  J.  They  are  all  listed  in  a  new  4- 
page  catalog  which  will  be  sent  free  on 
request. 

Four  main  groups  of  the  materials 
are  (1)  window  and  counter  displays, 
(2)  sales  promotion  units  for  appeal 
to  old  and  new  customers,  (3)  store 
and  service  necessities,  and  (4)  free 
electros  and  mats. 


General  sales  manager  George  W. 
Russell  of  Sentinel  reports  that  gen- 
eral business  conditions  in  Western 
and  Southwestern  area  are  excellent, 
following  his  recent  trip  through  those 
territories.  Sentinel  jobbers  in  those 
sections  registered  enthusiasm  for  the 
new  1%  volt,  6  volt  and  AC  models, 
according  to  Mr.  Russell.  President 
and  general  sales  manager  Ernest 
Alschuler  noticed  the  same  reaction 
from  distributors,  after  his  return  from 
a  recent  vacation  to  Hot  Springs,  Ark. 


A  new  line-up  among  the  representa- 
tives of  the  Standard  Transformer 
Corp.,  1500  N.  Halstead  St.,  Chicago, 
has  been  announced.  Added  to  the 
Stancor  list  of  reps  are:  W.  Bert 
Knight,  Inc.,  115  W.  Venice  Blvd.,  Los 
Angeles,  Calif.,  to  cover  the  lower  part 
of  California  up  to  and  including 
Fresno,  Arizona,  Nevada  and  Utah; 
Brown-Sherrill  Co.,  310  E.  Morehead, 
Charlotte,  N.  C,  to  cover  North  and 
South  Carolina,  Georgia  on  the  Fan 
line  only;  H oiling sworth  &  Still,  Nor- 
ris  Bldg.,  Atlanta,  Ga.,  to  cover  Ala- 
bama, Georgia,  Florida,  North  and 
South  Carolina  and  Tennessee;  J.  M. 
Cartwright,  1288  Vinton  Ave.,  Mem- 
phis, Tenn.,  to  cover  Louisiana,  Mis- 
sissippi, Memphis  and  Jackson  in  Ten- 
nessee, Texarkana  and  Eldorado  in 
Texas. 

W.  J.  B.  Kennedy  has  been  announced 
as  the  new  home  set  representative  in 
the  New  England  area  for  Galvin  Mfg. 
Corp.,  makers  of  Motorola  car  and 
home  radio.  Adolph  Vllman  of  Boston 
remains  the  company's  auto  radio  rep- 
resentative in  the  territory.  Mr.  Ken- 
nedy's radio  merchandising  experience 
has  been  long  and  successful;  he  was 
once  an  RCA  field  representative  and 
recently  worked  with  GE.  He  has 
moved  his  family  to  Melrose,  Mass. 

To  the  sales  force  of  Wincharger 
Corp.,  Sioux  City,  Iowa,  have  been 
added  L.  G.  Collins  and  /.  R.  Espinola. 
Mr.  Collins  will  direct  advertising,  to 
replace  Mort  Duff,  now  general  sales 
promotion  manager.  Mr.  Espinola  will 
assist  export  manager  A.  A.  Stewart. 
These  specialists  were  added  to  help 
handle  a  big  new  ad  campaign,  the 
new  dealer  cooperative  plan,  the  field 
force  which  has  been  doubled  twice, 
and  other  activity  connected  with  the 
firm's  increase  in  sales. 

Winners  of  Detrola  Corp's  national 
window  display  contest  are  both  Kan- 
sas City,  Mo.,  dealers.  Goldman's  won 
first  award  for  a  graduation  gift  dis- 
play; Mace's  won  second  for  a  window 
on  "Credit  at  Cash  Prices." 

New  representative  for  Sentinel  in 
the  state  of  California  is  Herbert  H. 
Horn,  Los  Angeles,  according  to  news 
from  general  sales  manager  George 
Russell. 


56 


Radio  Today 


RADIO   TOMORROW 

By  David  Sarnoff,  President  RCA 


One  would  be  blind  not  to  realize 
tbat  forces  are  in  motion  throughout 
the  world  today,  not  only  in  our  coun- 
try, but  across  the  seas,  whose  poten- 
tialities no  one  can  measure  with  any 
exactness.  The  world  in  many  parts 
is  in  a  state  of  revolution  and  con- 
flict. We  are  witnessing  a  transition, 
from  what  was  once  a  peaceful  and 
prosperous  world,  into  a  universe 
which  at  the  moment  is  at  logger- 
heads over  a  large  part  of  its  area. 
Doctrines  with  strange  connotations 
are  being  hurled  at  us  every  day. 

Yet,  I  feel  that  all  these  disturb- 
ances are  merely  adjustments  to  the 
progress  which  man  has  made  during 
the  past  century,  and  particularly  dur- 
ing the  past  two  or  three  genera- 
tions. The  technological  developments 
brought  about  by  science  and  indus- 
try have,  at  least  for  the  moment, 
outrun  man's  capacity  socially  to  keep 
pace  with  them.  So  I  view  the  world 
as  in  a  state  of  disequilibrium,  seek- 
ing to  adjust  itself  to  new  conditions. 

No  one  can  read  the  history  of  the 
world,  and  of  the  revolutions  and 
changes  which  have  taken  place 
throughout  any  period  of  history, 
without  coming  to  the  conclusion  that 
each  upset  was  followed  by  a  period 
of  progress  and  improvement.  Truly, 
man  advances  by  the  sweat  of  his 
brow.  It  was  Dante  who  said,  "Thy 
struggles     shall    make    thee     strong." 

No  depression  in  listening 

Regardless  of  how  deep  the  depres- 
sion has  been  in  other  fields,  no  one 
can  say  that  there  is  a  depression  in 
listening  to  radio  programs — which, 
after  all,  is  the  business  that  you  and 
I  are  in.  The  listeners  to  radio  pro- 
grams in  this  country  do  not  number 
less  than  they  did  a  year  ago.  They 
number  more.  And  they  can't  listen 
without  radio  sets  and  radio  tubes 
and  radio  devices.  They  can't  listen 
long  without  recognizing  that  you  can- 
not take  out  of  a  receiver  all  the 
things  that  are  put  into  the  micro- 
phone at  the  transmitting  end,  unless 
you  have  a  proper  mechanism  at  the 
receiving  end.  If  the  listener  fails  to 
recognize  that  fact,  it  is  your  job  and 
my  job  to  make  it  known.  After  all 
is  said  and  done,  you  may  have  a  Tos- 
canini  and  a  symphony  orchestra  be- 
fore the  microphone,  and  you  may 
have  the  finest  broadcasting  trans- 
mitters, and  the  best  wire  lines  con- 
necting broadcasting  stations  for  na- 
tional hookups,  but  if  the  receiver,  the 
loud  speaker  and  the  tubes  are  so 
made  that  they  cannot  let  through  the 
full  range  of  frequencies,  you  get  only 
a  part  of  what  is  transmitted.  And 
this  means  poor  reception. 

The  improvement  in  programs,  in 
transmission,  and  in  the  general  level 


of  the  type  of  programs  that  have  been 
sent  out  during  the  past  year  or  two, 
already  exceeds  to  a  considerable  ex- 
tent the  capacity  of  the  average  radio 
receiver  properly  to  receive  what  is 
being  transmitted.  I  don't  believe 
that  any  receiving  set  more  than  a 
few  years  old  can  measure  up  to  the 
capability  of  transmission  in  the  radio 
art  at  the  present  time. 

New  sets  needed 

So  after  you  get  through  talking 
about  gadgets,  and  about  this  button 
and  the  other  button,  the  fact  remains 
that  the  best  reason  why  a  new  radio 
set  should  be  installed  in  the  home  is 
because  the  new  radio  set  can  deliver 
the  new  radio  program  and  the  old 
set  cannot.  That's  without  talking 
about  the  extra  sets,  the  different 
models,  or  the  automobile  field  and 
other  fields  that  are  open  to  radio 
merchandising.  I  still  believe  that  the 
best  reason  for  a  new  set  is:  the  best 
reproduction  of  tone — the  best  repro- 
duction of  program  quality. 

As  to  new  developments,  my  feeling 
is  that  the  radio  industry  and  the  ra- 
dio art  are  a  long,  long  way  from 
stabilization.  I  do  not  make  that  state- 
ment with  any  regret  or  apprehension. 
It  has  been  said  that  the  greatest  asset 
on  the  radio  balance  sheet  is  our  ig- 
norance, because  if  we  knew  all  there 
is  to  be  known  in  radio,  the  values  on 
the  balance  sheet  would  be  definitely 
limited.  The  things  yet  to  be  done 
constitute  the  promising  assets. 

Radio   isn't   finished 

The  reason  there  is  not  going  to  be 
stabilization  in  the  radio  industry  for 
a  long  time  is  because  the  radio  in- 
dustry isn't  finished.  It  wouldn't  sur- 
prise me  at  all  if,  five  years  from  now, 
practically  every  known  radio  device, 
whether  for  transmission  or  reception, 
would  be  inadequate  to  meet  the  neces- 
sities of  the  art;  just  as  I  think  that 
any  radio  transmitter  or  receiver 
which  is  today  five  years  or  more  old, 
is  inadequate  to  meet  the  requirements 
of  the  present-day  art.  So  there  is  no 
saturation  in  radio,  and  there  "ain't 
going  to  be  none"  while  you  are  still 
young  enough  to  be  in  it. 

We  have  begun  to  open  the  field  of 
short  waves.    When  we  speak  of  short 


Progress  in  a  Period 
of  Transition 
An  Extemporaneous 
Address  to  RCA- 
Victor  Distributors 


waves,  we  do  not  mean  the  kind  of 
short  waves  which  you  now  listen  to 
on  a  receiver.  There  are  ultra-short 
waves,  and  there  are  waves  below  one 
meter,  there  are  centimeter  and  even 
millimeter  waves.  Who  knows  what 
rich  unopened  fields  are  to  be  found 
in  those  unknown  regions  of  the  spec- 
trum? We  have  always  thought  of 
radio  as  long-distance  communication. 
But,  I  think  that  with  the  further  de- 
velopment of  these  extremely  short 
and  ultra-short  waves,  we  will  be  able 
also  to  develop  new  methods  of  short- 
distance  radio  communication. 

Radio  devices  have  been  applied  to 
a  myriad  of  new  uses.  Some  one  has 
made  a  tabulation,  I  think,  of  more 
than  150  different  uses  to  which  radio 
tubes  are  now  being  put,  including 
sorting  cigars  and  showing  the  dif- 
ferent qualities  of  materials,  that 
were  never  contemplated  when  vacuum 
tubes  were  being  developed. 

Television 

You  have  been  hearing  discussions 
about  facsimile  and  television.  I  have 
no  more  doubt  of  the  ultimate  prac- 
ticability of  radio  facsimile  and  tele- 
vision than  I  have  about  the  fact  that 
I  am  now  standing  before  you. 

The  problem  is  the  program:  the 
financing  of  the  program  and  the 
building  up  of  a  circulation  adequate 
to  attract  enough  receivers  in  the 
homes.  You  can't  have  home  receivers 
before  you  have  transmitters  to  send 
them  programs.  You  can't  have  trans- 
mitters until  you  have  programs  to 
put  on  those  transmitters. 

It  is  interesting  to  observe  how  lim- 
ited is  our  human  imagination,  com- 
pared to  the  actual  possibilities  of  de- 
velopment along  scientific  lines.  It  was 
the  very  limitation  of  the  wireless 
telephone,  the  very  fact  that  it  did  not 
confine  its  voice  to  a  single  individual 
listener,  that  gave  it  its  universality; 
that  now  makes  it  possible  for  a  single 
voice  to  be  heard  simultaneously 
throughout  the  world.  That  limitation 
was  a  glorious  opportunity.  It  was 
what  made  broadcasting.  Perhaps  some 
such  nugget  will  be  found  in  the  very 
combination,  which  for  the  moment 
holds,  locked  up,  the  service  possibili- 
ties of  television. 

Fresh  opportunities 

I  have  been  trying  to  paint  for  you 
my  feeling  that  no  one  need  worry 
about  there  being  no  fresh  opportuni- 
ties to  do  business  in  radio.  No  one 
need  feel  that  the  present  transitional 
period  offers  the  slightest  excuse  for 
not  exercising  more  than  our  normal 
effort.  For  in  this  struggle,  in  the  ef- 
fort to  see  through  a  fog  a  little  bit 
further  than  those  who  merely  follow 
the  procession,  is  an  opportunity  for 
leadership.  I  think  we  can  find  ade- 
quate justification  for  our  confidence — 
in  ourselves,  in  our  organization,  in 
our  industry,  and  in  the  ultimate 
soundness  and  prosperity  of  the  coun- 
try in  which  we  are  proud  to  live. 


July,   1938 


57 


•    INDEX    • 

1 

TO  ADVERTISEMENTS 

Page 

AMPERITE    CO 

60 
25 

ANDREA    RADIO   CORP 

ARCTURUS    RADIO    TUBE    CO.    . 

51 

49 
45 

CENTRALAB      

CLOUGH    BRENGLE   CO 

CROSLEY    RADIO    CORP 

27 

EMERSON    RADIO    &   PHONOGRAPH    CORP.. 

5 

29 

GENERAL  ELECTRIC  CO 

Cover 

II 

HOWARD    RADIO    CO 

Cover 

III 

HYGRADE   SYLVANIA    CORP 

4 
39 

KEN-RAD   TUBE   &   LAMP  CORP 

55 

MALLORY  &  CO.,  INC.,  P.  R 

1 

MEISSNER    MFG.    CO    

47 

MORROW  &  CO.,   INC.,  WILLIAM..... 

56 

NATIONAL    UNION    RADIO    CORP.    ... 

39 

ONAN   &  SONS,   D.  W 

55 

PHILCO   RADIO   &  TELEV.   CORP.,  Set 

Div.. 

S 

PHILCO   RADIO  &  TELEV.  CORP.,  Tub 

e  Div. 

7 

PIONEER   GEN-E-MOTOR   CORP 

51 

RADIO   CORP.   OF  AMERICA 

2 
50 

RADIO    SERVICEMEN    OF  AMERICA,    INC... 

RADOLEK   CO                                       

59 
3 
35 

RAYTHEON    PRODUCTION   CORP 

RCA  MFG.  CO.,   INC.,   RCA-Victor  Div. . 

REGAL  AMPLIFIER   MFG.   CORP 

41 

RIDER,   JOHN    F 

37, 

51 

SOLAR   MFG.  CORP 

5S 

SPARKS-WITHINGTON    CO 

33 

STROMBERG-CARLSON  TELE.  MFG.  CO 

..30 

31 

TRIPLETT   ELEC.    INSTRUMENT  CO... 

4S 

TUNGSOL  TUBE  &  LAMP  WORKS,   INC 

47 

UNIVERSAL    CAMERA    CORP 

41 

WARD  PRODUCTS  CORP 

59 

WESTINGHOUSE     MERCHANDISING     HEAD- 
QUARTERS     

fi 

.Cover 

IV 

While    every    precaution    is    taken    to 
accuracy,      we      cannot      guarantee 
the     possibility     of     an     occasional 
or  omission  in  the  preparation  of  this 

insure 
against 
change 

index. 

58 


Radio  Today 


SALES  TONIC 


MINIATURE  CHARGERS 


Wind  charger  models  that  are  20  in. 
high  have  been  announced  for  display 
purposes  by  Parris-Dunn  Corp.,  Cla- 
rinda,  Iowa.  The  miniatures  are  built 
to  scale,  with  a  propeller  cut  to  operate 
in  front  of  an  electric  fan,  if  desired. 
In  the  showroom  or  shop  window  the 
model  may  be  run  by  a  concealed  fan, 
to  form  an  eye-catching  motion  display. 


TO  STIR  SERVICE  BUSINESS 

For  dealers  and  service  men  to  use 
ia  snappy  direct  mail  work  among  cus- 
tomers, Hygrade  Sylvania  Corp.  has 
issued  a  set  of  four  new  one-cent  gov- 
ernment post  cards,  and  two  new  con- 
sumer folders. 

The  cards  go  heavy  on  the  point  of 
regular  radio  inspection,  and  attract 
the  set  owner  by  both  comic  and  seri- 
ous illustration.  Brisk  colors  are  used 
throughout  the  set. 

Folders  are  printed  in  green  and 
black,  with  human  interest  sketches 
on  the  outside,  the  better-reception-via- 
the-radio-serviceman  message  on  the 
inside. 


'CALL  US  FOR  SERVICE" 


Union  jobbers.  Large  illustration  of  a 
monkey's  head  fits  in  with  the  advice 
"don't  monkey  with  your  radio — call 
us  for  radio  service."  The  card  has  an 
easel  back. 

Also  in  this  set  of  display  material 
is  a  new  window  streamer  which  simi- 
larly sells  radio  service  to  the  public. 


SELLING  SILENT  RADIO 

A  display  card  designed  in  lively 
colors  to  fit  over  the  new  Fada  Silent 
radios  has  been  released  by  Fada  Radio 
&  Electric  Co.,  Long  Island  City,  N.  Y. 
The  sales  story  of  radio  with  the  im- 
proved Dictograph  Mystic  Ear  is  told 
at  a  glance,  suggesting  that  "regular 
radio  reception  plus  absolute  quiet" 
has  an  appeal  for  a  wide  market  in- 
cluding living  rooms,  hospitals,  chil- 
dren's rooms,  offices,  bed  rooms,  hotels, 
guest  rooms,  apartments,  dormitories, 
airplanes,  clubs,  trains,  nurseries, 
ships,  etc. 


NEW  BOOKLETS 


Announced  by  Solar  Mfg.  Corp.,  599 
Broadway,  New  York  City,  is  a  new 
9-S  catalog,  a  feature  publication  which 
includes  the  firm's  new  line  of  Minicap 
dry  electrolytic  condensers,  as  well  as 
the  new  CC  analyzer.  Besides  extra 
illustration  and  elaborate  rating  data, 
this  catalog  features  five  colors.  It  is 
available  from  New  York  headquar- 
ters,  rather  than  from   Solar  jobbers. 

With  special  completeness,  a  wide 
variety  of  products  are  described  and 
illustrated  in  a  new  44-page  1938  cata- 
log just  issued  by  Meissner  Mfg.  Co., 
Mt.  Carmel,  111.  Arranged  for  easy 
reading  and  quick  reference,  the  book 
attractively  includes  electrical  charac- 
teristic tables  and  is  available  free 
from  Meissner  headquarters  or  from 
parts  jobbers. 

Special  circular,  with  space  for  deal- 
er's imprint,  has  been  issued  by  Strom- 
berg-Carlson,  to  describe  and  illustrate 
the  1939  SC  line.  Specifications,  fea- 
tures and  other  products  are  included. 


NRPDA  ELECTS 


Window-counter  display  card,  a  dra- 
matic one  printed  in  three  colors  and 
gold   is   now  available  from   National 


At  a  big  meeting  during  the  Parts 
Show  in  Chicago,  the  National  Radio 
Parts  Distributors  Association  decided 
on  officers  for  the  1938-1939  season: 
President,  Leslie  C.  Rucker,  Washing- 
ton, D.  C. ;  vice-pres.,  Emmet  Tydings, 
Pittsburgh,  Pa.;  secretary,  George  D. 
Barbey,  Reading,  Pa.;  treasurer, 
Blakely  E.  Cross,  Gloversville,  N.  Y. 

The  directors  are  Arthur  C.  Stall- 
man,  Ithaca,  N.  Y. ;  William  A.  Shuler, 
New  Orleans,  La.;  Walter  Hollenbeck, 
Altoona,  Pa.;  Joseph  A.  DeMambro, 
Boston,  Mass.;  and  Ralph  C.  James, 
Sr.,  Seattle,  Wash. 

During  the  sessions  the  organization 
took  steps  to  hike  business  volume, 
to  promote  progressive  methods,  to 
support  the  RSA,  and  to  promote  fur- 
ther cooperation  between  manufactur- 
ers, distributors  and  servicemen  for 
improvement  of  economic  conditions. 
Price-fixing  was  checked  out. 


/?oWP  R  0  F  I  T  S  witk  Uul 
A**  WARD  AERIAL 


If  you've  been  looking  for 
a  quality  aerial  in  the  low- 
price  bracket,  Ward's  new 
5XX  is  the  aerial  you 
want.  Complete  with  36"  approved 
Low  Loss  Shielded  Lead  Cable  and  in- 
sulated lower  bolt  assembly,  this  3-sec- 
tion,  telescopic,  side  cowl  model  sells  at 
only  $2.95  and  still  makes  you  a  hand- 
some profit  on  every  sale!  Easy  to  in- 
stall. Made  of  rustproof  Admiralty  metal. 

FREE!! 

See  what's  new  for  Fall  in  WARD'S 
complete  line  of  car  aerials.  Write  for 
free  catalog. 


TA* WARD  PRODUCTS  £*/.. 

WARD   BUILDING  CLEVELAND,   OHIO 


•  Everything  you  need  in  radio.  It's  all  in 
this  new  1939  RADOLEK  RADIO  PROFIT 
GUIDE.  Every  repair  part  for  every  receiver. 
Newest  radio  receivers.  New  1939  model  public 
address  amplifiers;  outputs  from  5  to  100  watts. 
New  model  public  address  speakers.  Test  instru- 
ments, Technical  books.  Special  equipment.  Lead- 
ing standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  rigbt. 

•  And  everything  under  one  roof.  You  get 
what  you  want  propmptly,  and  exactly  what 
you  want.  Radolek's  immense  stock  plus  Rado- 
lek's  efficient  organization  insures  you  fastest  ser- 
vice, 25,000  servicemen  depend  on  this  service 
and  benefit  by  Radolek's  lowest  prices.  Send  now 
for  your  copy  of  Radolek's  Radio  Profit  Guide. 
You  save  time  and  money  at  Radolek! 

citT  radolek" cp. 

601  W.  Randolph,  Chicago,  Dept.  D-21 

Send    me    the    New    1939    Radolek    Profit    Guide 

FREE. 

Name    

Address    . . 
Serviceman? 


□        Dealer?  Q        Experimenter?  □ 


July,   1938 


59 


EXTRA  LINES 


With  the  flip  of  a  finger  you  can  now  (I)  lower 
or  raise  the  response  of  the  microphone.  .  .  (Z) 
adjust  the  microphone  for  most  desirable  re- 
sponse for  close  talking  or  distant  pickup,  .  , 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment, 

MODELS  RBHk,  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  11000  cps,  output, 
-65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable $42,00  LIST 


NEW  LOW-PRICED  CONTACT  "MIKE" 


$12.00  LIST 


The  new  popular-priced  Amperite  Contact  Mi- 
crophone can  be  used  on  most  radio  sets  made 
since  1935  and  on  all  P.A.  systems.  It  "makes 
an  ordinary  violin  sound  like  a  Strad"  . . .  gives 
a  small  piano  the  tone  of  a  Grand.  And  yet, 
there  is  no  distortion.  No  unnatural  ellects.  Wo 
"fingering  noises."  No  changes  in  strings  or 
instrument.  Attached  without  tools. 
Operates  with  either  high  or  low  gain  ampli- 
fiers. Has  frequency  response  of  40  to  9000  cps. 
Output,  -40  db.  20'  of  cable. 
MODEL  SKH  (Hi-imp);  SKL  (200  ohms), 

$12.00  LIST 
Professional  Model  KTH  (or  KTL) .   $22.00  LIST 


NEW  COMPACT  "MIKE" 


A  new  velocity  microphone  of  com- 
pact size,  having  a  head  only  l'/4"x 
23/8"xl3/s."  Good  for  speech  and 
music.  May  he  used  as  hand  mike  as 
well  as  lor  stand  mounting.  Complete 
with  output  transformer,  cable  con- 
nector and  switch.  Output,  -70  db. 
into  open  line.  Frequency  response 
60  to  7500  cycles. 
MODEL  ACH  (Hi-imp.);  ACL 
(200  ohms) $25.00  LIST 


MODEL  RAH...S22.00  LIST 


P.A.  Men,  you  can  improve  those 
"price"  jobs  by  using  the  popular 
Amperite  Model  RAH  (or  RAD. 
You  will  get  better  results  be- 
cause (1)  it  is  excellent  for  both 
speech  and  music;  (2)  has  flat  re- 
sponse without  undesirable 
peaks;  (3)  reduces  feedback;  (4) 
stands  up  under  rough  handling 
and  changes  in  temperature, 
pressure  or  humidity.  .  .  .  Fre- 
quency range  60  to  7500  cps.  Out- 
put, -68  db. 
MODEL  RAH  (Hi-imp);  with 

12'    of    cable;    RAL    (200 

ohms)  with  8'  of  cable, 

ONLY  $22.00  LIST 


Write  lor  Complete  Illustrated  Bulletins  and 
Valuable  Sales  Helps. 


Amperite  (g.  CJ 
7 


561  BROADWAY.  N.  Y. 

ible  Address:  Alkem.  New  York 


Pleasantaire  Corp.,  1623  Connecticut 
Ave.,  "Washington,  D.  C,  has  been 
granted  a  patent  on  window-type  elec- 
tric room-coolers.  U.  S.  Patent  No. 
2,120,208  recognizes  20  claims  as  new 
in  the  air-conditioning  art.  "The 
claims  of  this  patent  cover  quite  broad- 
ly numerous  features  of  the  unit,"  ex- 
plains President  Richard  F.  Roper, 
"and  therefore  the  patent  affords  Pleas- 
antaire Corp.  a  very  substantial  monop- 
oly upon  air-conditioning  units  of  the 
window  type.  We  hope  that  other 
patent  claims  we  now  have  on  file  will 
make  the  room-cooler  a  major-appli- 
ance item  with  a  year  or  two." 

Federal  Refrigerator  Corp.,  57  E. 
25th  St.,  New  York  City,  have  gone 
into  action  as  exclusive  distributors 
for  the  Johnson  Space  Cooler  in  the 
area.  Distribution  will  be  made 
through  dealers  now  handling  prod- 
ucts either  made  or  jobbed  by  Federal, 
and  the  firm  expects  to  shortly  have 
some  250  dealers  lined  up  on  the 
cooler. 

Stefan  Kugler,  1805  N.  Wilcox  Ave., 
Los  Angeles,  Calif.,  has  started  opera- 
tions as  manufacturers'  representative. 
He  was  for  12  years  buyer  for  May 
dept.  stores  in  Denver,  Colo.,  and  for 
the  past  3  years  owned  and  operated 
the  OK  Appliance  Corp.,  a  distributing 
firm  for  radios  and  appliances  in  the 
same  city.  Latter  company  was  dis- 
solved due  to  the  accidental  death  of 
business  partners.  Mr.  Kugler's  ac- 
tivity in  Los  Angeles  will  accent  radio, 
appliances  and  allied  lines. 


RECORDS  WORTH  WATCHING 


BING  CROSBY  with  Eddie  Dunstedter  at  the  organ 
singing  Little  Lady  Make  Believe  and  Don't  Be  That 
Way  with  John  Scott  Trotter  and  his  orchestra — 
Decca  1794. 

MUSIC  OF  YESTERDAY  AND  TODAY  STYLED 
THE  BLUE  BARRON  WAY  playing  When  They  Played 
the  Polka  with  VR  by  Buss  Carlyle,  Ronny  Snyder  and 
ensemble  and  Sweet  Genevieve  with  VR  by  Three  Blue 
Notes— Bluebird  B7605. 

WINGY  MANN0NE  and  his  orchestra  playing  Mar- 
tha and  The  Flat  Foot  Floogee,  both  with  VR  by 
Mannone — Bluebird  B7621. 

FRANCES  LANGFORD  singing  Night  and  Day  and 
Then  You've  Never  Been  Blue,  with  Harry  Sosnik  and 
his  orchestra — Decca   1831. 

BOB  CROSBY  and  his  orchestra  playing  Royal  Gar- 
den Blues  and  Tea  for  Two,  featuring  Bob  Zurke  at 
the  piano — Decca  1850. 

CHICK  WEBB  and  his  orchestra  playing  A-Tisket 
A-Tasket  with  VC  by  Ella  Fitzgerald  and  Liza — Decca 
1840. 

LARRY  CLINTON  and  his  orchestra  playing  Foo 
To  You  with  VR  by  chorus  and  Harmonica  Hop- 
Victor  25882. 

RUBY  NEWMAN  and  his  orchestra  playing  In  a 
Little  Dutch  Kindergarten  and  The  Charming  Spell  of 
Your  Embrace,  both  with  VC  by  Ray  Morton — Decca 
1878. 

BENNY  GOODMAN  and  his  orchestra  playing  The 
Flat  Foot  Floogee  with  VR  and  Big  John  Special- 
Victor  25871. 

ANDREWS  SISTERS  singing  Says  My  Heart  from 
the  Paramount  film,  "Cocoanut  Grove,"  and  Oh,  Faith- 
less  Maid — Decca  1875. 

SWING  AND  SWAY  WITH  SAMMY  KAYE,  playing 
I  Married  an  Angel  and  Whispering  both  with  VC  by 
Jimmy   Brown — Vocalion   4140. 


Iris  candid  cameras 

Two  models,  Standard  and  Deluxe, 
are  the  first  of  a  series  of  the  candid 
type.  Vitar  F:7.9  color  corrected  lens, 
precision  type  3-speed  shutter  with  4- 
stop  diaphragm.  Picture  size,  1%  x 
1%",  using  fast  Ultrapan  6-exposure 
film  roll  retailing  at  15  cents.  Camera 
measures  5x2%xl%6",  weighs  19% 
oz.  Bright  vision  type  optical  view 
finder.  Provision  for  cable  release. 
Standard  model  CD-79  in  black  enamel 
with  chromium  trim,  $5.95.  Deluxe 
model  in  chromium  finish  with  leather- 
ette covering,  $7.50.  Universal  Cam- 
era Corp.,  32  W.  23rd  St.,  New  York, 
N.  Y. — Radio  Today. 


Koolroom  complete  conditioner 

Line  of  self-contained  air  condition- 
ing units  includes  nine  models,  from 
$175  to  $1,350.  Unit  with  low  price 
is  33  A-WS,  portable,  window  sill 
job.  Capacity  4,000  B.T.U.  per  hour, 
equal  to  melting  600  lbs.  of  ice  per  day. 
Motor  is  y3  h.p.  110-volt  60-cycle  AC. 
No  water  connections;  operating  cost 
less  than  1  cent  per  hour.  Automobile 
steel  cabinets  with  baked  finishes  in 
ivory,  office  green  or  walnut.  Height 
17",  width  23",  depth  29".  Net  weight 
175  lbs.  List,  $175.  Koolroom  Divi- 
sion, Indian  Products  Corp.,  Chicago. — 
Radio  Today. 


Kandor  cameras 

Three  new  models.  Kandor  C401, 
Kandor  Comet  C402,  and  Kandor  De- 
luxe C403.  Komet,  illustrated  herewith, 
has  waterproof  leatherette  covering 
with  chromium  trim,  steel  construction 
throughout.  Three  diaphragm  open- 
ings, Eyvar  Meniscus  50  mm.  lens. 
Uses  any  of  5  standard  films.  Picture 
size,  l^xl1^".  Camera  size,  4%  x 
2ixl;  weight  14  oz.  Provision  for 
tripod.  C401  lists  at  $2.98;  C402,  $3.98; 
C403,  $4.95.  Irwin  Corp.,  27-33  W.  20th 
St.,  New  York,  N.  Y  —  Radio  Today. 


60 


Radio  Today 


Calling  All  RADIO   DEALERS  . . . 

who  didn't  make  a  PROFIT  in  1937-38 

%  HOWARD  RADIOS 


Howard  quality 
recognized  by  the  ama- 
teur and  the  service- 
man. These  radiocritics 
prefer  Howard  .  .  .  ask 
them. 


Showing  a  few  of 

Howard's  12  Models 


With  Howard: 
Dealers  Do  Not 
Have  to  Worry 
About ... 

•PRICE  SLASHING 
RUINING  YOUR 
BUSINESS:  No 
Howard  set  was  ever 
dumped  in  any  dis- 
tributor's   territory. 

•  MANUFACTURER'S 
COMPETING  WITH 
YOU:  Howard  is  sold 
under  one  name  and 
exclusively  through 
dealer-  distributor 
channels. 

•  EXCESSIVE  SERV- 
ICE EXPENSE : 
Howard  has  been 
universally  recog- 
nized as  manufac- 
turing precision 
radio  products  for  17 
years. 

•  A  LINE  WITH 
EIGHT  DOZEN 
MODELS  ONLY  A 
FEW  OF  WHICH 
SELL :  Howard  covers 
the  entire  popular 
price  range  with 
12  outstanding 
receivers . 

•  HIGH  PRESSURE 
TACTICS  — NOR 
EXCESSIVE  IN- 
VENTORY: Howard 
Radios  can  be  pur- 
chased when  and  as 
required. 


TYPICAL    HOWARD 

1939    VALUE 

Howard  is  an  exclusive  manufacturer  of  radio  sets 
with  a  performance  record  of  17  years'  experience  in 
quality  merchandise.  Howard  has  learned  through 
this  long  experience  that  in  order  for  the  dealer  and 
the  distributor  to  make  a  profit,  radio  manufacturing 
operations  must  be  highly  flexible  with  production 
under  control  at  all  times.  Dealers  must  be  permitted 
to  order  merchandise  that  sells  without  being  loaded 
up  with  "dead  Indians"  that  won't  sell.  The  manu- 
facturer must  be  set  up  to  produce  the  right  mer- 
chandise when  it  is  needed  and  with  quality  that 
doesn't  entail  endless  service.  Distributors  and  dealers 
must  be  permitted  to  make  their  full  profit  at  all  times 
and  must  not  be  subjected  to  factory  competition. 

Howard's  line  for  1939  offers  the  most  beautiful  style 
appeal  in  their  17  years  of  radio  set  manufacturing 
and  includes  every  tested  new  feature  at  prices  made 
possible  only  because  Howard  manufactures  more 
parts  than  any  other  manufacturer  in  the  industry. 

For  complete  catalog  and  information  on  sales,  ad- 
vertising and  financing  plans,  write  — 


DISTRIBUTORS :  Jobbing  proposition  is  open 
in  some  territories.  Call  or  wire  collect. 
Howard  also  offers  Communication  Receivers. 


HOWARD  RADIO  CO. 

1731  West  Belmont  Avenue,  Chicago,  Illinois 
America's    Oldest  Radio  Manufacturer 


Extremely  compact  midget  re- 
ceiver having  iron  core  coils 
and  indirect  dial  drive. 


MODEL  430 
Communication  Receiver 

Six  Tubes  —  Four  Bands 

Ceramic  Coil  forms: — Separate 
band  spread  condenser  gang; 
excellent  10  meter  perform- 
ance; Iron  Core  I.F.  Trans- 
formers ;  Frequency  Coverage 
540  KC  to  40  MC.  Amateur 
Net  Price  $29.95  with  built-in 
speaker.  A  complete  line  of 
Communications  Receivers 
from  $29.95  to  $105.45. 


MODEL  468 

8  Tube— 3  Band 
A.C.  Super; 
8-inch  dynamic 
speaker ;  B  a  s  s 
boost  tone  con- 
t  r  o  1 ,  Perm-a- 
i  matic  push  but- 
ton tuning.  The 
ultimate  in  a 
table  model! 


Still  the  MOST 

ECONOMICAL 
RADIO  POWER 

3650  Hours 

i  A  YEAR 


POWER 
OPERATING  COST 


NEVER  any  need  to  cut  down  on  listening  hours 
when  a  Wincharger  powers  the  radio.  For  power 
costs  Wincharger  owners  next  to  nothing— makes  10 
radio  hours  a  day  as  cheap  as  one— and  ALSO  gives 
extra  power  for  lights,  a  fan,  an  electric  fence  or 
razor,  and  for  recharging  car,  truck  or  tractor  bat- 
teries— all  at  no  extra  cost! 

No  Dry  Batteries  — No  Replacements— 

Yes,  wind-power  is  "FREE  POWER"— plentiful, 
cheap  and  always  dependable  provided  it  is  gener- 
ated by  the  original  Wincharger  with  its  exclusive 
CROSS-BAR  GOVERNOR  and  with  1939  features 
yielding  up  to  30%  more  power. 

Endorsed  by  Leading  Radio  Manufacturers 
for  Best  Results  with  Farm  Radios 


WRITE  OR  WIRE  FOR  COMPLETE  DETAILS  AND  NEW  BOOK  "CLOSE  FIGURING" 


rjgtHARGER 


CORPORATION 

SIOUX  CITY,  IOWA 


World's  Largest  Manufacturer  of  Wind  Electric  Equipment 


§ 


▲ 


'.TiTT 


n  Calls  Every  Day!  Ask    em  to  Buy 


ibes,  Antennas,  Service  Repairs. 


"HERE'S  THE  GREATEST 

RADIO  SCOOP  OF 
THE  PAST  TEN  YEARS". 


x' 


IAZING  G-E  BEAM -A- SCOPE  ENDS  NEED 
FOR  AERIALS  AND  GROUND  WIRES.  NEW 
G-E  RADIO  OPERATES  IN  ANY  SPOT  IN  ANY 
ROOM.  JUST  PLUG  IT  IN  LIKE  A  FLOOR  LAMP. 

GET  voU«  FREE  copv  « 
T„,s  wu**  »"*  CTRT 

THE  GENERA  EtECTRV = 

KEYBOARD  *"^jjf 

(SPECIAL 
DEALERS' 
EDITION) 

A   tested    selling 
plan  for  increas- 


L 


radio 
rough 


ing  yo"r 
sales    thr 
HOME  SELLING 
-based  upon  the 

actual  experience 

of    550 

most   succ 


of    the 

ful    radio    dealers 


sssful 


throughout  the  nauon^osucces 

Areal^ing-^ Rising  campaign 

selling-  A  smart  met  ^ 


home  ■■ 
for    your 


local    pro 


today    from    your 


motion 
G-E 


Get     your 


Radio    Distributor. 


4^ 


qpj 


Again  General  Electric  leads  the  parade  with 
the  most  brilliant  radio  development  of  the  past 
ten  years — the  amazing  Beam-a-scope.  This  new 
scientific  built-in  mechanism  does  away  entirely 
with  the  need  for  unsightly  aerial  and  ground 
wires.  It  makes  the  new  G-E  the  one  radio  that 
does  not  need  to  be  "anchored"  in  one  fixed 
location  in  the  room.  It  operates  in  any  spot — 
216    cities  J         jn  any  room  Just  plug  it  in  like  a  floor  lamp — 

anywhere  you  choose.  Also,  the  Beam-a-scope 
reduces  local  static  interference — gives  you  finer, 
quieter  reception — especially  in  noisy  areas. 

Think  what  a  tremendous  advantage  the  Beam- 
a-scope  gives  you  in  closing  demonstration 
sales — -in  the  home — or  on  the  sales  floor.  It's 
this  year's  greatest  radio  sales  feature. 

Every  radio  in  the  new  1939  G-E  line  is  designed 
and  engineered  for  sales  action.  This  year,  more 
than  ever,  it's  easier  to  sell  the  new  G-E  Radios 
than  to  sell  against  them. 


GENERAL  f§  ELECTRIC 


7 
8 


9  Star  Points 
Feature  the  New 

MallorY 

Type  BB 
Condensers 

Positive,    non- corroding    con- 
nections. 

2    Positive   acting  gas  seal  .  .  .  con- 
densers cannot  explode. 

93    One  piece  drawn  aluminum  can. 

/£    Heavy  leads . . .  no  thin  foil  tabs. 


Another  Star  of  the  First  Magnitude 
the  2nd  Edition  Mallory-Yaxley 
Radio  Service  Encyclopedia  ... 

You  'II  agree  with  thousands  of  other  service  men  that  the 
2nd  Edition  "IV1YE"  is  the  greatest  help  a  service  man 
ever  had.  Covers  every  phase  of  automatic  tuning... every 
system.  Nearly  twice  the  information  given  in  the  1st 
Edition.  Second  printing  just  off  the  press.  Be  sure 
to  have  your  distributor  reserve  a  copy  for  you  now. 


A  Nine  Point  Star 
to  Solve  Your 

CONDENSER 
PROBLEMS 

This  entirely  new  Mallory  development 
brings  you  all  the  advantages  you've  ever 
had  in  condensers,  plus  new  improvements 
of  tremendous  significance  to  you. 


SJ    New  separator  material . . .  im- 
pervious to  surge  voltage. 

4  p    Extremely  low  power  factor  and 
series  resistance. 


Uniformly  low  RF  impedance. 

Uses  new  Mallory  fabricated 
plate.  Much  shorter  than  other 
types  of  plate  for  given  capacity. 
No  acid  etching.  No  squeezing 
to  fit  can.  Plenty  of  room  for 
separator  and  electrolyte. 


O    No    temperature  limitations 
due  to  small  size. 


USE 


MALLORY 

REPLACEMENT 
|  CONDENSERS ■  .  ■  VIBRATORS 


P.  R.  MALLORY  &  CO.,  Inc. 
INDIANAPOLIS,     INDIANA 

Cable  Addren  —  PELMAUO 


USE 

**        REPLACEMENT 
VOLUME  CONTROLS 


RADIO  TODAY,  August,  1938,  Vol.  IV,  No.  8,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription  yearly 
$1.00  in  U.  S.  and  Latin  American  countries;  $1.25  in  Canada;  $2.00  all  other  countries;  single  copy,  25c.  Entered  as  second-class  matter  July  24,  1936, 
at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.  Printed  in  U.S.A.    Member  of  A.  B.  C.    Copyright  1938  by  Caldwell-Clements,  Inc. 


5  TUBE  MODEL  PS-102.  "Teeny-Weeny"  style. 
Tunes  1720  to  550  K.C.  and  police  calls.  AC-DC 
Superhet  Circuit;  A.V.C.;  2  Watts  Output;  Beam 
Power  Tube;  Dynamic  Speaker;  Illuminated  Dial; 
Built-in  Aerial.  Beautiful  molded  cabinet;  avail- 
able in  ivory,  black  or  walnut.  Only  6y2"\^Yp"x 
4lA.".  Weighs  only  5  lbs.  Black  or  walnut  lists 
at    only    


P-800  ELECTRIC  PHONOGRAPH.  A  magnifi- 
cent new  A.C.  musical  instrument.  Has  full  six 
watts  output.  Features:  Dynamic  Speaker; 
Tone  Control;  Variable  Speed  self-starting 
motor;  10"  turntable;  Crystal  pickup  with 
tangent  head.  Plays  all  size  records  flaw- 
lessly.      In    solid    walnut    cabinet. 


PB  JR.  RECORD  PLAYER.  The  finest  avail- 
able. Plays  all  size  records  through  any  radio. 
Has  Crystal  pick-up,  self-starting  motor,  8" 
turntable,  volume  control  and  on- off  switch, 
etc.  For  110  volts  A.C.  6"/4xl4xlO'/2".  Weighs 
only  10  lbs.  In  solid  walnut  cabinet  with 
removable  cover. 


Sonortf 


6  TUBE  MODEL  D-12.  A  two-band  AC-DC  Superhet  of  brilliant 
styling.  Tunes  1720  to  535  K.C;  2200  to  7000  K.C.  Features: 
2  Watts  Output;  Beam  Power  Tube;  Tone  Control;  A.V.C.;  6" 
Slide  Rule  Dial;  6"  Electro-dynamic  Speaker.  Size:  16"x7'/2"x9%". 
The  new  type  table  cabinet  has  the  exclusive  SONORA  louvre  grille. 


RADIO  &  TELEVISION  CORP. 

MERCHANDISE   MART   •   CHICAGO 

PHONOGRAPH   DIVISION: 
Sonora  Electric  Phonograph  Company    •     132  W.  22nd  St.,  N.  Y. 

SONORA  is  open  for  qualified  distributors 
for  territories  not  yet  adequately  represented. 
Write,     phone     or     wire     for    complete    details. 


SINCE  1914  -  THE  LEADING  NAME  IN  THE  MUSIC  REPRODUCING  WORLD 


Radio  Today 


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FIRM  FOUNDATIONS 


EVERY  Sylvania  tube  is  built  on  a  "firm 
foundation" — you  may  be  sure  of  that. 
For  in  the  basing  process — as  in  every  other 
step  of  manufacture — Sylvania  insures  perfec- 
tion by  accepting  only  the  finest  in  materials 
and  workmanship. 

To  begin  with,  a  special  grade  of  basing 
cement  is  used,  the  best  obtainable — and  Syl- 
vania's  base  shells  undergo  exacting  tests  be- 
fore acceptance.  Then  the  bases  are  "loaded" 
with   cement   as   shown   above  .  .  .  the    glass 


bulbs  are  carefully  attached — and  finally,  the 
complete  units  are  slowly  baked  in  tempera- 
ture-controlled ovens  to  secure  perfect  adhe- 
sion. 

At  the  Sylvania  factory,  it's  "quality  in  every- 
thing"— from  the  very  beginning  of  produc- 
tion until  the  tubes  are  packed  and  shipped. 
That's  why  you  can  recommend  Sylvanias 
with  confidence  .  .  .  and  sell  them  with  profit ! 
Hygrade  Sylvania  Corp.,  Emporium,  Pa. 
Cable  HYSYLVANIA,  N.  Y. 


Hygrade    Sylvania    Corporation    Also    Manufactures    the    Famous    Hygrade    Lamp    Bulbs. 


SYLVANIA 

SET-TESTED     RADIO     TUBES 


4 


,    „,rj 


Radio  Today 


THEY'VE  SEEN- -THEY'VE  BOUGHT- -THEY  AGREE 

/stb  Kadiob  T/crt/ea/t.Llftt/ 

Distributors  and  Dealers  who  have  seen  the  new  Stromberg- 
Carlsons  say,  "\t  is  the  radio  line  of  the  year/'  Every 
dealer  owes  it  to  himself  to  see  this  great  line  at  once. 
Have   your   distributor   give   you    radio's    real    profit   story. 


PORTLAND,    MAINE 

Farrar-Brown   Co. 
BOSTON,  MASS. 

Gross   Sales,    Inc. 
NEW  YORK,  N.  Y. 

Gross  Sales,    Inc. 
ALBANY,   N.  Y. 

Hudson   Valley  Asbestos  Corp. 
ELMIRA,   N.  Y. 

Barker,    Rose   &    Kimball 
ROCHESTER,  N.  Y. 

Stromberg-Carlson  Tel.  Mfg.  Co. 
BUFFALO,  N.  Y. 

Graybar  Electric  Co. 
PHILADELPHIA,  PA. 

Motor  Parts  Co. 
SCRANTON,  PA. 

Charles  B.  Scott  Co. 
ALTOONA,   PA. 

Electric  Appliance   Distributors 
PITTSBURGH,  PA. 

Graybar  Electric  Co. 
CLARKSBURG,  W.  VA. 

Williams  Distributing  Co. 
RICHMOND,  VA. 

Graybar  Electric  Co. 
AKRON,  OHIO 

Hamburg  Bros.  Co. 


COLUMBUS,  OHIO 

Pixley  Electrical  Supply  Co. 
CINCINNATI,  OHIO 

Graybar  Electric  Co. 
LOUISVILLE,  KY. 

Stratton  &  Terstegge  Co. 
NASHVILLE,  TENN. 

Tennessee  Valley  App.,  Inc. 
DETROIT,  MICH. 

Specialties  Distributing  Co. 
SOUTH   BEND,  IND. 

Cloud   Bros.  Co. 
CHICAGO,  ILL. 

Stromberg-Carlson  Tel.  Mfg.  Co. 
MOLINE,    ILL. 

Rogers    Maytag    Co. 
MILWAUKEE,  WISC. 

Lappin  Electric  Co. 
DUBUQUE,  IOWA 

Renier  Radio  &  Television  Co. 
MINNEAPOLIS,  MINN. 

Graybar  Electric  Co. 
SIOUX  CITY,  IOWA 

Warren  Electric  Co. 
ST.  LOUIS,  MO. 

Brown  Supply  Co. 
KANSAS   CITY,    MO. 

Jenkins  Music  Co. 


OKLAHOMA    CITY,    OKLA. 

Jenkins  Music  Co. 

WICHITA,  KANSAS 

Jenkins  Music  Co. 

EL  PASO,  TEXAS 

Peterson  Lumber  &  Paint  Co. 

DENVER,  COLO. 

Robert  F.  Clark  Co. 

ALBUQUERQUE,  N.  M. 

Raabe  &  Mauger  Hdware  Co. 

PHOENIX,  ARIZ. 

Penrod  &  Siegmund 
SALT  LAKE  CITY 

Radio  Studios,  Inc. 
SPOKANE,  WASH. 

Hughes  &  Co. 
SEATTLE,  WASH. 

Graybar  Electric  Co. 
PORTLAND,  OREGON 

Graybar  Electric  Co. 
SAN  FRANCISCO,  CALIF. 

Graybar  Electric  Co. 
LOS  ANGELES,  CALIF. 
Stromberg-Carlson  Tel.  Mfg.  Co. 

SAN  DIEGO,  CALIF. 

Electric  Supplies  Dist'g.  Co. 


HERE  IS  WHY 
THEY  BOUGHT.. 


LABYRINTH  MODELS  from  $119.50* 

Radio's  greatest  selling  feature. 
Invention  for  improving  tone 
quality — now  available  at  prices 
anyone  can  afford. 

AUTHENTIC  DESIGNS— Style  New 
to  Radio— from  $99.50* 

Just  what  everyone  has  been 
wanting  for  years.  The  cabinet- 
making  art  of  the  18th  Century 
combined  with  the  radio  skill 
of  the  10th. 

TABLE  MODELS  priced  from  $39.95* 

The  most  attractive  sets  of  this 
type  to  be  found  in  radio.  Cabi- 
nets in  walnut  and  in  rosewood — 
a  size  for  every  table  radio  need. 

CORNER  CABINET  RADIO  and  EAR- 
LEVEL  PROJECTION  — New  Develop- 
ments Made  Possible  by  the  Labyrinth 

A  style  that  makes  every  pros- 
pect say,  "Why  didn't  someone 
do  it  before?"  A  feature  that  im- 
proves tone  quality  in  any  room. 

*AU  Prices  F.  0.  B.   Factory 


Get  in  couch  with  your  nearest 
distributor  or  write  direct  to  the 


Stromberg-Carlson  Telephone  Mfg.  Company 
179  Carlson  Road,  Rochester,  N.  Y. 

Please  send  me  complete  information 
on  Radio's  Hottest  Line, 


August,  1938 


S' 


UPPOSE  your  tube  checker 
did  have  a  profit  and  loss  dial. 
Which  way  would  the  needle  swing? 

Would  it  indicate  that  investment  losses 
due  to  slow  turnover,  obsolete  stock  and  cut- 
price  competition  are  cutting  into  your  profits? 

Under  the  Tung- Sol  Consignment  Plan, 
the  needle  always  reads  plus.  Your  profits  are 
guaranteed,  because  you  pay  only  for  the  tubes 
you  sell  after  you  sell  them. 


Thousands  of  dealers  who  could  qualify 
have  found  this  plan  the  means  to  profitable 
radio  tube  sales.  Our  nearest  office  will  be 
glad  to  furnish  you  with  details. 

TUNG-SOL  LAMP  WORKS,  INC. 
Dept.  C  Radio  Tube  Division 


NG-SOL 

-flour  Radio^LtS^ 


Sates  Offices:  Atlanta.  Hnxlnn.  Chicago.  Dallas.  Kansas  City.  Los  Angeles,  Detroit,  New  York*  General  Offices:  Newark, N.J. 


1939  RCA  Victor  Line  25%  Better 
Values  than  1938 "says  store  official 


Dealer  enthusiasm  from  coast  to  coast  con-  I 
firms  wisdom  of  RCA  Victor's  decision  to  offer   I 

ELECTRIC  TUNING 


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Two  of  many  enthusiastic 
dealer  letters 

Dealers  admire  new  console  grand  model  91  KG.  Price  $85.00* 
. . .  this  photograph  was  taken  in  the  Radio  Department 
of  Scruggs-  Vandervoort-Barney,  St.  Louis,  Mo. — one  of 
the  leading  department  stores  in  the  country.  Harry  Levy, 
RCA  Victor  disttibutor,  is  shown  demonstrating  RCA 
Victor  Model  97KG  to  Clarence  W.  Amos,  manager  of 
the  Scruggs -Vandervoort-Barney  Radio  Department, 
Joseph  Cantoni,  an  owner  of  the  Southside  Radio  Service 
Co.  of  St.  Louis,  and  J.  S.  Laurie,  vice-president  of  Scruggs- 
Vandervoort-Barney.  Letters  from  Messrs.  Laurie  and 
Amos  are  reproduced  on  this  page.  They  mirror  the  en- 
thusiasm dealers  from  coast  to  coast  hold  for  the  new  1  ine. 
Model  97KG  is  just  oneof  32  sensational  new RCAVictor 
tadios  with  ElectricTuning —  each  one  of  which  is  a  sure- 
fire profit  item — backed  with  features  to  help  you  sell. 
Some  of  the  outstanding  features  of  Model  97KG  are  its 


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new  distinctive  Console  Grand  Cabinet,  ElectricTuning 

for  6  stations,  Victrola  Button,  "Plug-In"  for  Victrola 

Attachment,  Straighr-Line  Dial  and  RCA  Victor  Metal 

Tubes.  'Price f.o.b.  Camden,  N.  J.,  subject  to  change  without  notice. 

FOR  FINER  RADIO  PERFORMANCE -RCA  VICTOR  RADIO  TUBES 

RCA  presents  the  Magic  Key  every  Sunday,  2  to  3  p.  m.,  E.  D.  S.  T., 
on  the  NBC  Blue  Network 


RCA  Manufacturing  Co.,  Inc.,  Camden,  N.  J. 

A    SERVICE    OF    THE    RADIO    CORPORATION    OF    AMERICA 


August,  1938 


HARRY  BOYD  BROWN 

Sational  Merchandising 
Manager  of  Philco 


All  Owners  of  Old  Sets 

Must  Now  Admit 
Their  Radios  Are  Obsolete 


PHILCO  Mystery  Control  revives  the  demand  for  quality  radio 
— removes  the  emphasis  on  price — sharply  reverses  the  trend 
toward  cheaper  sets.  Yes,  thanks  to  Philco  Mystery  Control,  this 


Fall  season  will  see  the  greatest  sales  and  profit  opportunity  for  Philco  Dealers 
since  the  introduction  of  the  AC  Tube  i  o  years  ago. 

A  thrilling,  dramatic,  exciting  radio  invention!  A  traffic-getter  without  paral- 
lel! A  demonstration  that  you  can  scarcely  believe  even  after  you  have  seen  it. 
But — most  important  of  all — a  radio  invention  that  brings  a  new  comfort — a 
new  convenience  and  pleasure  to  radio  operation  and  enjoyment.  A  revolution- 
ary radio  development  that  is  appreciated  by  everybody  the  instant  it  is  seen. 

Philco  Mystery  Control  makes  possible  a  newspaper  advertising  story  that 
will  pull  like  a  house  afire — and  better  still — that  will  bring  buyers  not  looking 
for  bargains,  but  buyers  that  are  willing  to  pay  the  price  for  something  fundament- 
ally and  vitally  new — something  tremendously  desirable. 

Philco  Mystery  Control  will  bring  hundreds  of  thousands  of  new  radio  buyers 
into  the  market.  Buyers  whom  mere  price  appeal  could  not  touch — buyers  who 
will  now  realize  that  their  old  radio  is  truly  obsolete — because  they  see  in 
Mystery  Control  the  one  thing  they  will  want  more  than  the  old  radio  they  have 
been  satisfied  with  for  years. 

Yes — hundreds  of  thousands  of  people — you  and  I  have  met  many  of  them — 
own  radios  for  which  they  paid  $300  or  more  a  few  years  ago.  You  have  heard 
them  say,  "My  old  radio  sounds  just  as  good  as  any  of  these  late  models".  Noth- 
ing short  of  actual  failure  to  operate  has  been  able  to  lure  these  people  into  the 
market. 

But  Mystery  Control  will  shatter  that  resistance.  Overnight,  every  radio  relic 
will  lose  its  lustre!  Every  time  its  owner  rises  from  a  chair  to  change  a  program, 
every  time  he  leaves  his  soup  at  the  dinner  table  to  tune  in  a  station,  every  time 
he  wishes  for  music  from  his  porch  or  bedroom,  that  old  set  will  whisper  to  him, 
"I'm  all  done!  I'm  obsolete!  What  you  need  is  Philco  Mystery  Control!" 

There  is  no  substitute  for  Philco  Mystery  Control.  And  remember — it  is  an 
exclusive  Philco  invention.  Only  Philco  has  it.  Only  Philco  dealers  will  cash-in 
on  it. 


PHttC 


^T^^^fi^^^^ 


Radio  Today 


AUG  17 


Staff— 

Darkell  Bartee 
G.  H.  Mayorga 
N.  McAllister 
M.  H.  Newton 
R.  Necbauer 
B.  V.  Spinetta 
Vinton    K.   Ulrich 


©ClrV  3S7365 

'.958   1 


K 


Orestes    H.   Caldwell 
Editor 

M.    Clements 
Publisher 


Vol.    IV,    Xo.    S 
Copyright    193S 


M.  E.  Herring 
Sales    Manager 

201  N.  Wells,  Chicago,  111. 


Member   Audit    Bureau    of   Circulations 


Caldwell-Clements,  Inc. 

Tel.   Plaza   3-1340 

480     Lexington     Ave. 

New   York,   N.   Y. 


RADIO  INVENTORIES 
IN  GOOD  SHAPE 

Eadio  goes  into  its  Fall  season  with 
stocks  in  very  excellent  shape  com- 
pared with  a  year  ago.  At  present 
there  is  no  congested  situation.  Man- 
ufacturers' inventories  are  largely 
liquidated,  and  no  threat  overhangs 
the  market.  Jobbers  and  dealers  are 
moving  their  stocks  satisfactorily, 
clearing  the  way  for  new  purchases. 
Xo  disquieting  factors  are  present  in 
the  1938  Fall  picture,  and  the  stage 
seems  all  set  for  healthy  recovery. 

Meanwhile  the  new  BMA  system  of 
checking  radio  production  by  weekly 
reports  of  manufacturers'  outputs,  in- 
ventories, and  jobbers'  stocks,  is  com- 
pleting its  first  month's  trial.  About 
two-thirds  of  the  receiver  manufac- 
turers are  reported  to  be  cooperating 
in  the  survey,  but  since  it  is  not  yet 
known  whether  large  or  small  set 
makers  are  missing  from  the  census, 
the  survey  will  be  more  significant 
for  trends  revealed  from  week  to 
week,  than  for  actual  production  fig- 
ures. 


Paul  S.  Ellison  of  Hygrade  Sylvania 
Corp.  has  been  named  chairman  of  the 
Sales  Managers'  Club,   Eastern  group. 

$5,848,841.64,  against  $6,754,272.07 
for  the  year  ending  June,  1937. 

For  the  six  months  from  January 
to  June,  inclusive,  1938,  the  radio  tax 
collections  were  31.5  per  cent  below 
those  of  the  first  six  months  of  1937. 


MAN-HOURS  AND  WEEKLY 
EARNINGS  RISE 

An  increase  of  half-an-hour  in  the 
length  of  the  average  work-week  in 
manufacturing  contributed  to  an  in- 
crease in  average  weekly  earnings 
from  $23.38  in  May  to  $23.77  in  June, 
according  to  figures  just  released  by 
the  National  Industrial  Conference 
Board.  Average  hourly  earnings  were 
the  same  in  June  as  in  May. 

Among  the  twenty-five  industries 
covered  by  the  Conference  Board's 
regular  monthly  survey,  increases  in 
total  man-hours  worked  were  noted 
in  the  following:  wool,  12.6  per  cent; 
iron  and  steel,  9.1  per  cent;  boot  and 
shoe,  8.6  per  cent;  leather  tanning, 
6.8  per  cent;  lumber  and  millwork, 
6.6  per  cent;  furniture,  3.4  per  cent; 
meat  packing,  3.3  per  cent;  rubber, 
1  per  cent;  and  hosiery,  0.6  per  cent. 

A  comparison  of  conditions  in  June 
of  this  year  with  those  of  a  year  ago 
shows  the  following  trends : 

Total  man-hours,  — 39.1  per  cent; 
payrolls,  — 38.2  per  cent ;  hourly  earn- 
ings, +1.6  per  cent;  length  of  aver- 


EXCISE-TAX  INDEX  UP 

An  increase  in  excise-tax  collections 
from  the  Federal  5  per  cent  excise  tax 
on  radio,  the  first  increase  since  No- 
vember, 1937,  was  recorded  in  June, 
1938,  by  the  U.  S.  Internal  Bevenue 
Bureau.  The  June  excise-tax  collec- 
tions, covering  operations  largely  of 
last  May,  were  $448,882.61,  an  increase 
of  12  per  cent  above  tax  collections  of 
$394,641.50  in  June.  1937.  Taxes  col- 
lected on  mechanical  refrigerators  last 
June  were  $565,129.15  against  $976,- 
637.18  in  June,  1937. 

For  the  fiscal  year  ending  June  30, 
1938,  the  excise  tax  collections  were 
13.4  per  cent  less  than  the  correspond- 
ing fiscal  year  ending  June  30,  1937, 
and  about  $1,000,000  below  the  Treas- 
ury estimates  when  Congress  was  con- 
sidering the  continuation  of  radio 
and  other  excise  taxes  last  winter.  The 
total  radio  and  phonograph  taxes  for 
the     June,     1938,     fiscal     year    were 


Col.  H.  H.  Frost,  many  times  president  of  RMA,  is  an  ardent  horseman.  Here  he 
is  on  his  favorite  mount,  Jeb  Stuart,  at  the  Piping  Rock  Horse  Show,  between 
spells   of   working    on    his   new   intercommunicator    and   other   radio    enterprises. 


August,  1938 


age  work-week,  — 17.2  per  cent ; 
weekly  earnings,  — 16.2  per  cent;  cost 
of  living,  — 2.5  per  cent;  real  weekly 
earnings,  — 14  per  cent;  employment. 
— 26.4  per  cent. 

BIG  REPLACEMENT  MARKET 
—FARMS  LEAD 

A  recent  survey  of  more  than  200,- 
000  electrified  farm  families  has 
shown  93.7  per  cent  as  owning  one  or 
more  radios. 

Only  12.1  per  cent  owned  sets  less 
than  one  year  old.  Sets  either  one  or 
two  years  old  amounted  to  31  per  cent, 
while  those  which  were  three,  four 
and  five  years  old  totaled  25.1  per  cent 
The  chief  surprise  was  that  radios 
over  sis  years  old  accounted  for  31.8 
per  cent,  the  highest  single  grouping. 

The  total  proportion  of  radios  over 
three  years  old  amounted  to  56.9  per 
cent,  or  considerably  more  than  half 
of  all  the  radios  owned. 

"The  important  factor,"  says  Phil- 
co's  Sayre  M.  Eamsdell,  "is  that  al- 
most a  third  of  radio  owners,  from 
this  survey,  own  radios  more  than  six 
years  old.  Within  the  past  six  years, 
or  even  three,  radio  has  been  revolu- 
tionized. Automatic  tuning,  foreign 
reception,  vastly  better  tone  and  de- 
sign are  all  very  recent.  This  coming 
year  will  find  even  more  revolutionary 
improvements  in  radio. 

"The  farmer,"  Eamsdell  continued, 
"is  in  a  more  advantageous  economic 
position  than  most  of  the  urban  pop- 
ulation.      Farm     prices     have     been 


Ernest    Alschuler,    busy    president    of 

Sentinel  Radio,  was  a  recent  vistor  to 

New  York  City. 


maintained  at  satisfactory  levels.  Sig- 
nificant of  the  buying  power  of  the 
farmer  is  the  fact  that  58  per  cent  of 
all  farms  are  absolutely  free  of  mort- 
gage indebtedness,  and  18  per  cent  is 
the  ratio  of  farm  debt  to  value,  which 
is  better  than  in  most  urban  and  in- 
dustrial areas." 

"BUSINESS  IS 
MUTUAL  SERVICE" 

George  D.  Barbey,  national  secre- 
tary of  the  National  Radio  Parts 
Distributors  Association,  and  head  ot 
the  George  D.  Barbey  Company,  radio 
parts  jobbers  of  Beading  and  Lancas- 
ter, Pa.,  has  a  motto  which  he  prints 
on  all  his  company  letterheads  and 
on  advertising  blotters  issued  by  the 
concern.  Here  it  is : 

"Business  is  mutual  service.  The 
more  you  do  for  us,  the  more  we  can 
do  for  you." 

A  number  of  radio  parts  jobbers  at- 
tending the  Chicago  trade  show  askea 
Mr.  Barbey  for  permission  to  use  this 
slogan  on  their  own  literature,  which, 
of  course,  was  gladly  given. 

URGES  LICENSING  OF  SERVICEMEN 

F.  Lingnor  of  Acme  Supply  Corp., 
510  W.  State  St.,  Milwaukee,  Wis.. 
is  leading  a  campaign  to  have  all 
radio  servicemen  licensed  by  the  state. 
In  letters  sent  to  the  industry  he 
writes : 

"A  state  license  for  the  serviceman 
would  give  him  prestige,  and  stop  so- 
called  gyp  and  cut-rate  shops,  also 
discourage  a  great  many  incompetents 
from  becoming  competitors. 

"The  watchmakers  license  law  went 
into  effect  (in  Wisconsin)  April  29, 
1937.  After  this  period  of  a  little 
over  a  year,  it  is  found  that  watch 
repair  prices  and  wages  have  in- 
creased. The  morale  of  watch  makers 
has  risen  and  they  are  no  longer  a 
down-trodden  trade. 

"Radio  servicemen  belong  in  the 
professional  group,  and  only  a  state 
license  will  place  them  on  a  higher 
plane." 

A  NEW  SALES  COMBINATION 

*  Radios,  microphones,  movie  pro- 
jectors and  cameras,  and  films  have 
grouped  themselves  together  as  a  new 
promotion  bet  for  radio  men.  Deal- 
ers may  now  sell  up-to-the-minute 
professional  home  movies,  with  sound, 
to  the  average  home. 

For  some  time,  radio  stores  have 
merchandised  cameras  and  projectors 
for  home  movie  use.  Now.  the  sug- 
gestion is  that  "voice"  effects  be  sup- 


plied by  speaking  through  a  micro- 
phone hooked  to  the  radio  set.  Scripts 
for  these  voice  effects  are  being  sup- 
plied by  Castle  Films,  Inc.,  New 
York,  makers  of  professional  films  for 
home,  club  and  school  movies. 

Castle  films  ranging  in  price  from 
$1.75  up  list  are  available  to  dealers 
who  want  to  hike  their  store  traffic  by 
supplying  film  releases  to  those  cus- 
tomers who  look  to  the  radio  store  as 
home  movie  headquarters.  The  com- 
pany attracted  considerable  attention 
with  its  16  mm.  and  8  mm.  films  of 
England's    Coronation   and   also   with 


Lee  McCanne  of  Stromberg-Carlson 
gets  a  riding  from  his  merry  son,  Roy. 

its  work  on  the  Hindenburg  crash. 
Newest  releases  are  "Hitler  Invades 
Austria,"  "American  High  Spots," 
"Canadian  High  Spots,"  and  "Big 
Fish."  The  releases  are  available  at 
the  rate  of  about  four  per  month. 

A  RECORD  MOB  DIALS 
THE  FIGHT 

Example  of  how  the  TJ.  S.  popula- 
tion makes  *  a  mass  attack  on  radio 
dials  when  the  right  show  is  broad- 
cast was  June  22  when  an  all-time 
record  audience  tuned  to  NBC  for  the 
Louis-Schmeling  event. 

The  Cooperative  Analysis  of  Broad- 
casting interviewed  set  owners,  found 
that  63  per  cent  of  the  total  heard  the 
fight.  Of  all  those  who  did  radio  list- 
ening after  8  p.m.,  92  per  cent  got 
the  bout,  and  at  10  p.m.  97  per  cent 
of  all  tuned  sets  were  hearing  the 
ringside  account. 


10 


Radio  Today 


TO  STARTUP!  RADIO-BUYING! 

PLANS     FOR    A     NATIONAL     RADIO    WEEK    THIS    FALL 


RADIO  buying  needs  a  tonic.  Everyone  in  radio — whether  dealer,  serviceman,  distributor 
or   manufacturer — agrees   that   radio   purchasing  needs  to  be  got  going  again. 

"As  soon  as  the  public  starts  buying  sets  freely,"  we  are  told  on  all  sides,  "everything  will 
be  all  right — all  along  the  line !" 

And  to  pry  radio  off  "dead-center,"  this  Fall,  we  have  all  the  tools  and  materials  needed, 
right  in  our  own  hands.  Radio  itself  possesses  the  greatest  promotional  machinery  ever  devised 
by  man — yet,  surprisingly,  radio  has  never  used  this  in  its  own  behalf. 

But  now  some  radio  men  are  waking  up.  Already  the  broadcasters  have  reorganized  their 
own  affairs,  elected  a  new  president,  and  are  out  to  prove  to  Washington  and  to  the  general 
public  that  radio  broadcasting  is  performing  a  public  service  and  doing  it  darned  well. 

Industry  banquet,  big  show 

Some  broadcasters  go  further  and  talk  about  a  big  National  Radio  Week  for  this  Fall — with 
headline  programs,  an  industry  banquet  and  perhaps  a  big  Radio  Show  to  demonstrate  to  lay- 
men how  much  bigger  values  one  gets  for  his  radio  dollar  now  than  ever  before. 

The  broadcasters  can  easily  stage  a  monster  affair  out  of  National  Radio  Week.  They  can 
make  radio  and  radio  programs  the  center  of  attention  this  fall.  But  the  set  and  parts  manu- 
facturers should  be  eager  to  play  roles  too,  in  this  big  promotional  effort,  and  to  see  that  the 
effects  of  this  timely  stimulant  to  sales  are  felt  and  shared  in  by  every  radio  dealer,  serviceman 
and  distributor.  The  electric-light  companies,  who  without  lifting  a  hand,  collect  as  much  from 
radio  as  do  the  broadcasters  themselves,  should  be  asked  to  help  by  devoting  local  advertising 
space  to  radio  before  and  during  National  Radio  Week. 

Push  sets,  tubes,  antennas,  parts 

Thus  a  National  Radio  Week  can  be  made  a  great  countrywide  occasion  to  glorify  radio, 
to  focus  attention  on  programs,  and  to  stimulate  sales  of  receivers,  tubes,  antennas,  parts,  and 
radio  service,  tying  in  with  other  promotions  already  under  way.  Through  such  a  campaign,  the 
broadcasters  will  build  more  listening  audience;  the  industry  will  find  more  customers.  And  the 
public  will  be  led  to  buy  additional  radios  and  to  appreciate  how  much  more  the  radio  dollar 
buys  today  than  ever  before. 

A  National  Radio  Week  in  October  should  start  radio-buying  going  again;  speeding  up  Fall 
sales  and  paving  the  way  for  a  big  radio  Christmas. 

Let's  see  that  radio  doesn't  miss  this  million-dollar  opportunity  for  all  radio  interests  to  pull 
together,  and  build  back  the  business  prosperity  of  earlier  days. 


This  chart,  com- 
piled by  Sales 
Management  from 
information  sup- 
plied by  Radio 
Today,  shows  how 
engineering  design 
and  modern  pro- 
duction have  mul- 
tiplied radio 
values. 


HOW  NEW 
RADIOS 

GIVE  TEN- 
FOLD VALUE 
FOR  THE 
DOLLAR 

COMPARED 

WITH  1928 


August,  1938 


EVERY  DAY,  MAKE  TEN  CALLS! 

Radio  men  add  outside  selling,  as  National  Salesmen's 
Crusade  makes  buyers  more  receptive 


A  big  sales  campaign  is  underway 
in  all  the  forty-eight  states  of  the 
nation.  It  is  built  around  a  very 
simple  formula  for  action: 

"Make  ten  calls  every  day." 

In  other  words,  each  day  plan  to 
push  ten  new  door-bells,  to  find 
buyers. 

Two  sound  principles  underlie  this 
National  Salesmen's  Crusade:  1.  De- 
spite the  recession,  many  families 
still  have  the  ability  to  buy.  2.  Sell- 
ing can  stimulate  demand  and  public 
confidence,  thus  accelerating  con- 
sumption and  in  turn  speeding  pro- 
duction and  employment.  "Sales 
mean  jobs."  And  jobs  mean  more 
sales. 

Already  the  campaign  is  producing 
sales  in  other  lines — refrigerators, 
automobiles,  furniture,  clothing — all 
over  the  country.  From  border  to 
border  and  coast  to  coast  local  groups 
have  taken   up   the  effort,   and  whole 


populations  are  alive  to  the  purposes 
of  the  campaign  and  ready  to  give  a 
sympathetic  reception  to  the  salesman 
who  calls  "cold  turkey." 

Radio  men  join  in 

Radio  men  have  used  little  "outside 
selling"  in  the  past.  Too  often  they 
have  been  content  to  wait  for  cus- 
tomers to  come  and  buy.  But  now 
that  whole  communities  are  getting 
sales-minded — and  sales  receptive — it 
is  time  for  radio  men  to  join  in,  and 
put  these  successful  methods  to  work 
to  sell  radio  sets,  tubes,  parts  and 
service. 

"One  of  the  big  reasons  this  sales 
crusade  has  gained  such  a  great  im- 
petus in  so  short  a  time  is  that  it  is 
so  simple.  There's  nothing  to  it. 
Anybody  can  do  it,"  comments  John 
F.  Ditzell,  Stewart -Warner  sales  man- 
ager. "You  don't  have  to  join  any- 
thing to  get  in  on  it.     You  don't  have 


to  buy  anything.  All  you  need  do  is 
fit  yourself  into  the  picture  and  go 
to  town  with  the  idea." 

"A  strong  point  in  favor  of  this 
concerted  effort  to  get  America  off 
dead-center  is  that  it  is  timed  right," 
adds  Mr.  Ditzell.  "There  are  increas- 
ing signs  that  sales  organizations  have 
decided  to  quit  waiting  for  the  Ad- 
ministration to  pull  a  white  rabbit 
out  of  the  hat,  and  are  taking  re- 
covery into  their  own  hands.  As  one 
man  put  it:  'You  can't  make  any 
foot-prints  in  the  sands  of  time  sit- 
ting in  a  chair  crabbing  about  the 
government.'  " 

Visit  other  business  men 

Personalized  selling  can  bring  many 
profit  dollars  tinkling  into  a  radio 
dealer's  cash  register,  according  to 
Alvin  Anderson,  Columbus,  Wis. 

Here  is  how  it  works :  Mr.  Ander- 
son gets  in  a  shipment  of  new  radios, 
tries  them  out  and  finds  reception 
wonderful,  and  selectivity  and  range 
all  that  could  be  asked  for.  Then  he 
gets  his  direct  mail  and  newspaper 
advertising  program  working  so  that 
everyone  in  his  territory  who  is  in- 
terested, can  read  about  the  features 
of  the  new  sets,  and  thus  see  why 
they  are  superior  to  last  year's  models. 

Then  Mr.  Anderson  starts  out  dur- 
ing spare  time  to  call  on  all  the  busi- 
ness men  in  his  town.  Not  a  high- 
pressure  selling  campaign,  under- 
stand. He  merely  drops  in  to  call  on 
business  men  and  begins  talking  radio 
programs.  He  knows  the  favorite 
radio  programs  of  most  of  the  mer- 
chants, and  mentions  "how  swell  these 
programs  come  in"  on  the  new  sets. 

Often  such  a  lead  gets  the  mer- 
chant interested.  He  asks  questions, 
and  before  Mr.  Anderson  leaves  he 
has  invited  the  merchant  to  come  to 
the  store  some  afternoon  or  evening 
to  listen  to  the  new  sets,  and  often 
the  result  is  another  sale. 


Office  people  are  prospects  for  radios, 
too.  Picture  shows  Rockefeller  Center 
office  of  Miss  LeBrun  Rhinelander,  so- 
cial arbiter  for  young  women,  with  her 
handy  Andrea  "studio  monitor"  as  a 
desk-top  companion. 


Seven  "men  about  town" 

Jensen  Bros.,  Terre  Haute,  Ind., 
where  G.  E.  Turner  is  a  sales  expert, 
have  found  that  the  new  emphasis  on 
house-to-house  work  gives  the  store  a 
new  command  of  summer  radio  sales. 
The  firm  has  seven  men  "around  the 
town,"  using  all  possible  music  and 
appliance  contacts  as  openers. 

Here,  three-day  home  demonstra- 
tions are  favored;  Jensen  records 
show  that  70  per  cent  of  them  result 
in  sales. 

Jes'  circulate 

At  the  Mulvane  Eadio  Co.,  Mul- 
vane,  Kansas,  where  farm  radio  busi- 
ness is  important,  a  novel  part  of  the 
outside  sales  work  is  "just  circulating 
around  on  street  on  the  days  when  the 
farmers  are  in  town." 

Barber  shops  and  certain  shady 
spots  on  Main  Street  where  knots  of 
farm  folk  are  seen  to  gather  are  good 
bets,  according  to  Mulvane  radio  men. 
To  remain  in  the  store  and  depend 
on  window  displays  in  a  small  town 
like  this,  where  you  can  step  out  on 
the  street  and  see  practically  every- 
thing that  goes  on,  is  no  good,  they 
say. 

The  subject  of  the  weather  is  for- 
ever of  great  importance  to  farmers, 
because  it  makes  or  breaks  their  crop 
yields.  Agriculturalists  will  always 
"open  up"  on  this  topic,  and  it  is  an 
easy  matter  for  radio  salesmen  to 
get  the  conversation  around  to  the 
matter  of  wind-chargers,  without 
starting  out  with  what  is  obviously  a 
sales  attack. 

Twelve  selling 

"We  have  twelve  fulltime  radio 
salesmen  now  doing  a  job  outside  the 
store,"  reports  W.  S.  Eiley  of  the 
Eobinson  Music  Co.,  Steubenville, 
Ohio. 

"We  believe  in  this  'sales-mean- 
jobs'  campaign  because  we  think  that 
salesmen  should  realize  that  they  ac- 
tually are  a  factor  in  the  business 
structure  of  this  country." 

To  give  the  Eobinson  campaign 
some  special  purpose,  the  store  is  cur- 
rently doing  its  outside  selling  among 
the  finest  homes  of  Steubenville. 
These  prospects  are  commonly  be- 
lieved to  be  hard  to  approach,  but 
early  results  in  this  Ohio  town  indi- 
cate that  skilled  salesmen  get  a  good 


"There's  no  place  like  home"  to  demon- 
strate a  fine  receiver.  And  no  home 
cozy-corner  is  complete  without  a 
modern  radio.  Illustrated  is  the  novel 
Stromberg-Carlson  "corner  console" 
which  fits  diagonally  into  any  corner 
space. 


SIX  DONT'S  FOR  SALESMEN 

Don't  forget  that  the  basic  desire 
of  human  beings  is  for  things  and  not 
for  money. 

Don't  count  on  fancy  selling  ideas 
and  sales  psychology  to  take  the  place 
of  hard  ivork. 

Don't  waste  your  time  with  the 
prospective  customer  in  the  discussion 
of  politics,  economics,  the  depression, 
recession,  the  New  Deal  or  the 
weather.  Too  many  salesmen  spend 
75  per  cent  of  their  talking  time  on 
the  political  and  economic  situation, 
15  per  cent  on  the  weather,  and  only 
10  per  cent  in  talking  about  the  goods 
they  have  to  sell. 

Don't  "pad"  your  call  record.  In  do- 
ing so  you  are  fooling  yourself  more 
than  the  boss. 

Don't  succumb  to  the  urge  to  lay  off 
on  all  of  the  many  holidays — and 
every  time  the  baby  has  a  new  tooth. 

Don't  think  that  your  fine  person- 
ality and  wide  acquaintance  will  get 
results  without  hard  work  —  calls, 
calls,  calls. 


reception  generally,  and  are  allowed 
to  tell  their  new  radio  sales  story,  in 
full,  to  wealthy  persons  in  the  big 
homes. 

These  salesmen  are  encouraged  not 
to  make  too  many  calls  per  day — one 
of  them  made  a  hundred  in  a  single 
day  and  was  advised  to  shorten  the 
list   and   do   a  more  thorough  job   at 


each  door.  Home  demonstrations  are 
being  offered,  but  are  sharply  limited 
to  those  prospects  which  are  the  most 
likely  buyers.  Single-day  trials  are 
favored. 


Tube  openers 

A  house-to-house  canvass  in  which 
lie  offered  to  test  radio  tubes  free  was 
productive  of  more  business  for  Al 
Bains,  proprietor  of  Bains  Electric 
Company,  Oneonta,  Ala.,  than  he 
could  handle. 

The  time  from  6:00  to  8:30  in  the 
evening  was  used  for  the  check-up,  so 
as  to  catch  people  at  home  and  not 
to  interfere  with  regular  business 
hours.  Bains  worked  one  part  of  the 
town  at  a  time,  so  that  a  trip  could 
not  be  charged  up  to  each  call. 

"The  'old  something  for  nothing' 
urge  gained  us  entry  into  95  per  cent 
of  the  homes,"  explained  Mr.  Bains. 
"We  averaged  one  tube  sale  to  each 
home,  also  various  parts.  A  few 
owners  of  old  static-makers  traded 
them  in  for  new  models.  We  have  a 
notebook  full  of  customers  on  whom 
we  are  still  working. 

"This  experience  was  proof  to  us 
that  the  more  contacts  a  dealer  estab- 
lishes with  the  public  the  more  busi- 
ness he  will  do." 


a 


ANALYZING  THE  NEW  1938-39  SETS 

Push  buttons  used  on  85%  of  consoles.    Average  price  down  15% 


Most  important  fact  about  the  new 
sets  is  that  two-thirds  of  all  consoles 
and  table  models  have  push-button 
tuning  (miniature  table  sets  not  in- 
cluded). Approximately  85  per  cent 
of  the  console  models  offered  this  year 
have  automatic  tuning.  In  table 
models  the  figure  is  slightly  under  50 
per  cent,  mainly  because  of  the  much 
lower  price-ranges. 

While  the  use  of  push  buttons  for 
tuning  has  greatly  increased,  the 
average  prices  have  dropped  quite  a 
few  per  cent.  The  average  price  of 
all  table  (including  miniature)  and 
console  models  is  $57.60  for  1938-39, 
as  compared  to  $67.50  for  last  year 
and  $65  for  two  years  ago.  In  one 
year  the  average  price  has  dropped  15 
per  cent. 

The  reduction  in  the  average  price 
is  noticeable  in  both  the  table  and 
console  models,  showing  that  it  is  not 
due  entirely  to  the  introduction  of 
the  miniature  table  models.  The 
average   console   price   is   $100.50   for 


*  All  figures  used  in  this  article  are 
based  on  Radio  Today's  specifications 
appearing  in  the  July  and  August 
issues  for  1938,  the  June  and  July 
issues  for  1937,  and  the  September 
issue  for  1936,  and  were  compiled  by 
Vinton  K.   Vlrich. 


this  year  as  compared  with  $116  a 
year  ago — this  is  a  reduction  of  about 
13  per  cent. 

The  average  number  of  tubes  used 
has  also  decreased  somewhat.  In  the 
AC-DC  sets  the  decrease  is  partly 
due  to  Radio  Today's  application  of 
the  R.M.'A.  tube  definition  which 
rules  out  plug-in  line  dropping  re- 
sistors (ballast  tubes).  This  year's 
average  AC-DC  table  set  has  5J4 
tubes  as  against  6.1  for  1937-38.  For 
AC-DC  consoles  the  figures  are  7yi 
for  this  season  and  8.6  tubes  for  last 
year.  The  average  miniature  table 
model  (mainly  AC-DC  sets)  has  4J^ 
tubes.  All  table  models  including 
miniature  have  an  average  of  5.35 
tubes,  while  a  year  ago  it  was  6%. 

In  the  AC  type  sets  the  reduction 
in  the  number  of  tubes  is  a  smaller 
percentage.  The  average  AC  table 
model  employs  6.1  tubes  as  compared 
with  6J4  for  last  year.  AC  consoles 
this  year  have  an  average  of  9  tubes 
while  a  year  ago  the  figure  was  9yi. 

More  combinations, 
fewer  chairsides 

While  neither  chairside  sets  nor 
combinations  are  included  in  the  pre- 
ceding averages,  the  following  com- 
parisons are  available.  For  this  year 
there  are  27   chairside  models  which 


AVERAGE  PRICES  AND  NUMBER  OF  TUBES 

IN    1939  MODELS  COMPARED  WITH    1937    AND  1938  SETS 


CONSOLE   MODELS 


TABLE   MODELS 


939 

i  1938 
937 

|   1939 

i 
i 

|l938 

i 

i_ 

(  1937 

TUBES 
■         ■■■         i         i         i 

—J 

n                              A    .                          A                             * 

40  60  80  IOO  120 

DOLLARS 


39 

H     »» 

"j  1938 

[    1938 

1937 

L__ 1 

|    1937 

'      '      ■ 1 I 1 1 — 1 — l 

are  offered  by  10  manufacturers,  while 
in  the  1937-38  season  there  were  18 
companies  making  40  models.  Com- 
binations, on  the  other  hand,  are  on 
the  increase.  This  year  we  have  listed 
in  our  specifications  a  total  of  115 
models  under  20  trade-names  (elec- 
tric phonographs  are  omitted).  A  year 
ago  there  were  19  manufacturers  of 
combinations  with  only  92  models. 
And  announcements  to  be  made  in 
the  next  month  will  add  several  more 
manufacturers  to  the  list  of  combina- 
tions. Furthermore,  this  year's  prices 
are  way  under  those  for  a  year  ago. 
All  indications  point  to  an  increase 
in  the  combination's  popularity. 

Automatic  tuning  simplified 

This  year's  line  of  sets  uses  auto- 
matic tuning  systems  that  are  far 
superior  to  those  of  a  year  ago.  Sta- 
tion set-up  has  been  greatly  simpli- 
fied and  electrical  circuits  stabilized 
against  temperature  changes.  The 
telephone-dial  type  mechanism  is  used 
in  only  one  or  two  models.  The 
mechanical  lever  type  of  device  has 
been  perfected  and  is  used  in  more 
than  one-third  of  the  table  models 
having  push  button  tuning. 

Since  last  year  a  trimmer  type  of 
push-button  tuning  using  iron-core 
coils  or  inductances  has  been  intro- 
duced and  it  is  featured  in  almost 
one-third  of  the  push-button  consoles. 
Motor-type  tuning  is  still  very  popu- 
lar in  the  higher-priced  consoles,  but 
it  is  only  in  third  place  as  shown  in 
the  accompanying  chart.  The  dia- 
gram showing  the  use  of  the  various 
types  of  push  button  tuning  is  based 
on  the  number  of  models  listed  in 
Radio  Today's  specifications.  Minia- 
ture table,  chairside,  and  combina- 
tions are  not  included. 

With  the  advent  of  temperature 
compensating  condensers  and  iron-core 
trimmer  units,  automatic  frequency 
control  has  become  less  popular,  be- 
ing used  in  only  a  few  of  the  most 
expensive  models.  The  drift  that  was 
common  in  previous  push  -  button 
models   not  having  A.F.C.   seems   to 


The  "average"  consoles  for  1939  and 
tico  years  ago  have  approximately  the 
same  price  and  number  of  tubes.  The 
average  price  of  all  table  models  is  de- 
creasing each  year. 


Mechanical  type  of  tuning  leads  in  the 
table   sets,   while  permeability   or  in- 
ductance type  tuning  predominates  in 
the   consoles. 


have  been  conquered  through  the  use 
of  better  and  new  circuit  components. 

As  might  be  expected,  the  glass  tube 
with  the  octal  base  is  increasing  in 
popularity,  and  at  the  expense  of  the 
old  type  glass  tubes.  Metal  tubes  are 
used  in  more  models  this  year  than 
last.  An  accompanying  chart  shows 
a  break-down  of  the  various  tube 
types  as  employed  in  consoles  and 
table-type  sets  for  this  year  and  the 
past  two  seasons.  The  white  portion 
of  the  bar  shows  the  percentage  of 
sets  which  use  the  type  of  tube  ex- 
clusively. The  shaded  portion  means 
that  the  tube  type  is  used  in  combi- 
nation with  other  types  of  tubes,  but 
that  it  is  the  predominating  type. 

The  octal-G  bar  for  1939  table 
models  is  interpreted  as  follows :  12.7 
per  cent  of  all  models  use  the  octal- 
based  glass  tube;  21.8  per  cent  of  the 


Chart  at  the  right  shows  the  popularity 
of  metal,  octal  glass,  and  old-style  glass 
tubes  over  a  three-year  period.  The 
solid  portions  of  the  bar  indicate  the 
percentage  of  sets  using  the  particular 
type  of  tube  exclusively.  Shaded  sec- 
tions show  percentage  of  sets  using  a 
particular  type  of  tube  in  combination 
with  another  type..  Sets  having  com- 
binations of  tube  types  are  grouped  by 
the  predominating  tube  type. 


sets  (shaded  section)  use  octal  glass 
tubes  in  combination  with  either  the 
old  glass  or  metal  types  (octal-G  tube 
predominates  in  the  combination). 
The  white  portion  of  the  bar  at 
the  right  indicates  that  2.6  per  cent 
of  the  table  models  are  using  the 
small  or  miniature  type  octal-based 
glass  tube. 

The  increased  use  of  metal  tubes 
in  the  table  sets  is  found  mainly  in 
the  miniature  and  other  extremely 
compact  receivers. 

As  was  true  last  year,  the  price 
range  of  radios  starts  at  a  few  dollars 
and  soars  to  many  hundreds  for  the 
super  deluxe  models.  However,  most 
of  the  manufacturers  have  curtailed 
their  activity  in  the  really  expensive 
models.  To  date  only  five  manufac- 
turers have  announced  consoles  cost- 
ing over  $170,  while  a  year  ago  there 
were  eight.  This  fact  is  even  more 
significant  when  one  considers  the 
increased  use  of  push  button  tuning 
with  its  attendant  increase  in  cost. 


"RELATIVITIS" — 
DEADLY  TO  SALES 

"Relativitis"  is  an  insidious  disease 
that  attacks  at  least  75  per  cent  of  all 
radio  sales  after  they  are  made,  ac- 
cording to  Irving  Smith,  Baranov's, 
San  Diego,  Cal. 

"The  first  thing  that  happens  after 
the  purchase  of  a  radio  is  that  all  the 
relatives  come  to  see  it.  It  is  then 
that  the  insidious  germs  of  'relativi- 
tis'  are  planted  to  begin  their  deadly 
work  of  undermining  the  sale." 

Typical  remarks  by  relatives:  "The 


tone  of  this  radio  is  not  nearly  as  good 
as  ours!"  "I  can  get  all  kinds  of  sta- 
tions you  can't."  "You  paid  entirely 
too  much.  Ours  is  just  as  good  and 
only  cost  half  as  much."  And  so  on, 
each  relative  adding  his  bit. 

"The  final  result  leaves  the  customer 
in  various  stages  of  doubt  as  to  the 
wiseness  of  her  choice,"  continues  Mr. 
Smith.  "A  more  or  less  degree  of  dis- 
satisfaction has  been  planted,  and  if 
left  alone  often  grows  and  festers 
until  it  breeds  all  kinds  of  trouble. 
Discontented  with  her  purchase,  the 
customer  may  be  hard  to  collect  from ; 
she  may  harbor  a  feeling  of  ill-will 
towards  the  store,  and  may  even  go  so 
far  as  to  have  us  take  the  radio  away. 
"Our  method  of  overcoming  'rela- 
tivitis'  is  to  make  a  sale  twice," 
explains  Mr.  Smith.  "The  salesman 
who  makes  the  sale  delivers  the  radio 
and  makes  sure  it  is  working  all  right 
before  he  leaves  the  house.  Twice  in 
the  next  ten  days  he  calls  and  inspects 
the  radio  and  talks  with  the  customer 
about  it,  thus  reselling  it  to  her  and 
so  overcoming  germs  of  relativitis  as 
they  are  planted!" 


ONE  RADIO  IN  THREE 
NEEDS  SERVICE 

The  Chicago  Section  of  the  Radio 
Servicemen  of  America  recently  made 
a  house-to-house  survey  of  4,000  radio 
homes  in  the  Chicago  area.  Results 
of  the  check-up  showed  that  34  per 
cent  of  the  radio  sets  inspected  were 
either  inoperative  or  in  need  of  ser- 
vice attention,  reports  Ray  Mason, 
chairman   Chicago  Section  RSA. 


TUBE  TYPES    USED  IN  1939   SETS 

COMPARED  WITH  1937  AND  1938  SETS 


TABLE  MODELS 


CONSOLE  MODELS 


MIDGET    TYPE" 


yA%wr////// 


OCTAL  GLASS 

^^1938 


3 

P^21      1939 

GLASS 
PH      1938 

---    '    ' 

m 

B^I937 

OCTAL  GLASS 

<%  1939 
^1938 

■■■Kl    1937 

DEALERS  ARE  OUT  FOR  SALES 

They  don't  wait  for  the  phone  to  ring— they  make  it! 


"Business  is  not  so  bad  as  people 
think  it  is,"  says  J.  C.  Kennedy, 
Washington  (D.  C.)  radio  man,  with 
18  years'  experience  in   servicing. 

"Business  is  just  as  good  as  you 
make  it.  You  will  find  that  true 
anywhere.  We  do  some  direct-mail 
advertising  all  the  time,  and  keep  the 
multigraph  busy  to  get  business.  That 
is  the  only  solution — to  go  out  after 
it.  Don't  wait  for  it  to  stroll  in,  or 
for  the  telephone  to  ring  .  .  .  make 
it  ring. 

"After  all,  people  still  suffer  from 
inertia,  about  99J/2  per  cent  of  them. 
And  99  per  cent  still  follow  the  path 
of  least  resistance  and  keep  putting 
things  off.  Get  busy  and  go  get  it. 
Most  radio  men  lay  back  and  do  noth- 
ing. The  business  is  there.  If  they 
won't  take  it,  it  is  their  own  fault." 

Does  it  with  trailers 

Two  trailers  belonging  to  Lake- 
view's,  radio  retailers,  Passaic,  1ST.  J., 
have  been  rolling  around  New  Jersey 
for  the  past  year,  each  trailer  carry- 
ing four  men  and  a  crew  manager. 
The  men  work  on  commission,  the 
crew  manager  on  a  salary  and  over- 
writing. Last  year  Lakeview's  sold 
3.000  radios,  65  per  cent  between  $100 
and  $150,  25  per  cent  at  $150  or  over 
and  10  per  cent  below  $100.  Terms — 
12  to  IS  months. 

The  trailers  carry  different  makes 
of  radios.  Arriving  at  a  certain  sec- 
tion, the  men  get  out  and  work  every 
house  on  a  staggered  canvass.  Two 
men  on  each  side  of  the  street,  one 
takes  even  numbers,  the  other  odd,  so 
that  each  man  works  every  other 
house.  This  has  been  found  the 
quickest  method  of  making  contacts 
and  getting  results.  Frank  Hoppe, 
manager,  says  that  a  city  of  50,000 
can  be  covered  in  a  few  weeks  with  a 
trailer,  if  canvassing  is  selective.  His 
men  are  instructed  to  eliminate  the 
poorest  sections  and  those  housing  the 
wealthier  homes,  which  are  hard  to 
get  in,  and  even  if  successful,  only 
the  servants  can  be  seen.  Hoppe  says 
a  man  can  make  100  contacts  daily 
with  less  exertion  via  trailer  than  he 
can  make  25  calls  on  foot,  conse- 
quently salesmen  are  better  satisfied. 
He  reports  no  turnover  on  salesmen 
since  the  trailers  were  put  into  ser- 
vice.    Frequently,  first-time  sales  are 

16 


made  from  a  Lakeview  trailer,  which 
is  practically  a  selling  impossibility 
with  an  ordinary  canvass. 

The  trailer  eliminates  many  call- 
backs because  prospects  may  be  taken 
right  outside  and  given  demonstra- 
tions. 

Demonstrators  travel 

However,  the  salesmen  still  have 
plenty  of  evening  calls  to  make,  some- 
times with  the  trailer,  sometimes,  if 
more  convenient,  in  their  own  cars. 
Although  the  trailer  hasn't  eliminated 
the  call-back  entirely,  it  has  made  it 
unnecessary  to  bring  or  send  pros- 
pects to  the  showroom  for  demonstra- 
tions, except  in  special  cases,  and  this 
has  cured  one  headache  in  selling 
radios  with  outside  salesmen.  Too 
often,  appointments  for  showroom 
"demos"  break  up  the  salesman's 
orderly  routine  in  the  field,  and  if  he 
leaves  the  handling  of  prospects  to 
showroom  personnel,  there  is  likely  to 


RADIO  IS  ALL  LIT  UP! 


-*i 


eg 


y* 


Here's  a  radio-lamp  with  chassis  con- 
cealed at  the  base.  Controls  are  mid- 
way the  stem,  speaker  at  top.  A  new 
one  from  Radio  Lamp  Co.,  1227  W. 
Washington  Blvd.,  Chicago. 


be  disputes  over  the  split  on  commis- 
sion or  the  failure  to  sell. 

The  oeriaf  "opener" 

When  Charlie  Deason,  owner  of  the 
Deason  Badio  Co.,  101  Navarro  St., 
San  Antonio,  Texas,  wants  to  make 
up  a  hot  prospect  list  for  new  radios, 
he  gets  into  his  car  and  drives  to  the 
section  of  town  where  he  thinks  he 
can  sell  new  sets  with  short-wave. 

He  then  drives  up  and  down  the 
streets,  jotting  down  in  a  special  book 
the  house  numbers  of  those  homes  that 
do  not  have  short-wave  aerials.  This 
fact  can  easily  be  determined,  Mr. 
Deason  says,  by  checking  on  each 
house  as  he  goes  along. 

Criss-cross  records 

When  he  gets  back  to  the  office, 
with  his  black  book  full  of  house  num- 
bers, Deason  consults  his  criss-cross 
telephone  directory  which  lists  the 
the  names  of  all  people  living  at  vari- 
ous house  numbers,  and  thus  is  able 
to  get  the  names  of  people  whose 
house  numbers  he  took. 

Deason  then  sends  these  people 
postcards  advertising  the  sets  he  has 
for  sales.  The  following  week "  an- 
other followup  card  is  sent,  and  the 
third  week  another  card  is  mailed. 
After  three  cards  a  new  set  of  pros- 
pects is  made  up  with  the  use  of  the 
crisscross  directory,  and  other  streets 
used. 

Results  are  OK 

"This  plan  has  worked  out  very 
well  for  us,"  states  Mr.  Deason.  "We 
try  to  send  out  about  300  cards  a  week 
and  we  feel  reasonably  certain  they 
are  going  to  people  who  are  prospects 
for  the  new  sets,  including  short  wave. 
Quite  a  number  of  people  have  come 
in  carrying  these  cards,  which  shows 
that  the  advertising  pulls.  As  close 
as  we  can  estimate,  we  get  about  a  10 
per  cent  return  on  such  mailing,  which 
also  includes  service  calls." 

Mr.  Deason  points  out  that  he  keeps 
revising  his  direct  mail  list  in  this 
manner  so  that  his  cards  prove  effec- 
tive. It  takes  but  a  short  time  to 
make  up  a  good  mailing  list  on  up-to- 
date  sets  by  checking  on  aerials,  and 
the  response  to  a  mailing  of  the  cards 
is  often  very  prompt. 


Radio  Today 


n 


- 


4vVi 


V 


Dewald  model  531  at  $39.95. 
At   the  left,   Ansley's   D25   with   15   tubes. 

Popular   demand    for    record 
music    starts    a    new    trend. 


BIG  PLAY  ON  PHONOGRAPH-RADIOS! 


Admiral    521-5C,    $29.95. 


Emerson    BL218,   $69.95. 


Motorola   59F1,   5   tubes. 


Zenith  6S304,  6  tubes. 


Detrola's  Leader  model  235-AP,  five  tubes. 


Fada  554PT,  AC  or  AC-DC. 


RCA   Victrola   U-119,   duplex   controls,   $79.9: 


JOBBERS  COUNT  ON  COUNTER  MEN 

But  finding  them  and  training  them  is  quite  a  trick 


"More  important  than  many  re- 
alize!" 

This  is  a  typical  crack  made  by 
parts  jobbers  when  they  get  to  think- 
ing about  counter  men — where  to 
find  them  and  how  to  train  them. 

Every  last  distributor  is  anxious 
to  be  well  represented  in  this  depart- 
ment of  his  business.  The  guy  at 
the  counter  is  after  all  the  one  who 
faces  the  supporters  of  the  house — 
he's  right  in  the  middle  of  traffic. 
A  jobber  can  get  himself  the  finest, 
most  complete,  most  up-to-the-minute 
stock  available,  yet  if  the  chap  who 
dishes  it  out  across  the  counter  is  a 
punk,  the  success  of  the  firm  is 
blocked. 

If  you  are  a  distributor  and  you 
ever  need  a  good  counter  man,  the 
following  is  what  you'll  run  into,  ac- 
cording to  current  opinion  in  the 
jobber  trade. 

Don't  expect  to  find  him  in  any 
particular  trade  group.  You  can't 
decide  that  he  will  be  located  among 
your  ham  or  serviceman  customers, 
although  the  possibility  is  likely. 
Many  of  the  gents  among  your  pa- 
trons will  be  too  successful  in  their 
own  business  to  be  available;  many 
of  them  are  too  deeply  interested  in 
radio  as  a  hobby  to  make  good  sales- 
men. 

Narrow  your  search  generally  to 
those  who  have  had  some  experience 


THE  LIKELY  COUNTER  MAN 

Has  a  distinct  sales  personality. 
Earns  about  $30,  flat  salary. 
Understands  modern  circuit  design. 
Has  studied  engineering  essentials. 
Is  around  30  years  old,  married. 
Was  once  a  radio  service  man. 
Regards  radio  as  more  than  a  hobby. 
Reads  trade  journals,  bulletins,  etc. 


with  dealing  with  the  public.  Don"t 
bother  with  the  fellows  who  have  had 
their  noses  in  circuits  all  their  lives. 
Too  often  they  don't  know  and,  don't 
care  about  radio  performance  as  a 
popular  affair.  One  jobber  reports 
that  these  "bugs"  are  likely  to  go  into 
a  huddle  with  one  customer,  about 
some  extra-special  point  of  trans- 
mitter design,  and  forget  all  about 
the  fact  that  he  is  supposed  to  be 
waiting  on  others  who  come  in. 

These  radio  men  do,  however,  have 
the  advantage  of  being  intensely  and 
genuinely  interested  in  their  subject, 
and  do  a  beautiful  job  as  far  as  per- 
sonal enthusiasm  goes.  If  only  they 
do  not  forget  that  they  are  a  unit  of 
a  sales  organization. 


"Gotta  have  one  that  fits  just  right — it's  an  awful  job  to  drill  extra  holes!" 

18 


Look  around  until  you  locate  a 
man  who  has  had  some  service,  and 
some  ham  experience,  a  sound  tech- 
nical training,  a  thorough  knowledge 
of  the  problems  of  those  who  are  your 
customers.  The  boys  who  can  get 
along  without  this  background  are 
rare.  Reports  a  distributor :  "In  all 
my  experience  I've  run  across  only 
one  man  who  could  do  a  counter  job 
without  knowing  anything  about 
radio.  It's  actually  all  Greek  to  him. 
He  lets  the  customer  do  the  talking — 
he  leads  them  on  and  gets  by  with  it. 
But  men  with  such  talents  are  as 
scarce  as  hen's  teeth." 

"Just  enough  technical  training  to 
know  parts  and  their  proper  use," 
prescribes  another  jobber.  "Counter- 
men shouldn't  have  to  tell  service 
men  how  to  do  their  work,  but  they 
have  to  know  enough  practical  radio 
to  be  able  to  suggest  proper  replace- 
ments and  most  suitable  equipment." 

Another  parts  manager  wants  to 
give  his  counter  men  their  first  ex- 
perience as  such.  Those  who  have 
worked  for  other  jobbers  have  an- 
nexed habits  and  fixed  ideas  as  to 
what  the  job  calls  for.  These  no- 
tions are  often  hard  to  change  and 
may  be  awkward  and  tiresome  to  the 
new  employer. 

The  matter  of  age 

It's  a  good  idea  to  take  a  special 
look  at  the  applicants  between  the 
ages  of  25  to  30,  although  most  job- 
bers agTee  that  it  is  not  smart  to  set 
definite  age  limits.  It  depends  on 
the  man. 

"I  don't  think  many  older  men  will 
be  found  behind  radio  parts  coun- 
ters," observes  one  boss.  "I  don't 
know  of  any,  myself.  Young  married 
men  are  likely  to  furnish  most  prom- 
ising stock  as  prospective  counter 
men." 

A  few  houses  use  very  young  fel- 
lows at  the  counter.  The  theory  is 
that  customers  do  not  expect  special 
assistance  from  these  youngsters — 
they  can  see  at  a  glance  that  they  are 
not  confronted  by  an  old  timer.  Ser- 
vice is  mechanical,  but  usually  peppy. 
Special  problems  are  taken  up,  when 
necessary,  with  older  men  in  the  store. 
You  can  save  a  little  money  this  way. 

An  occasional  high-powered  coun- 
ter man  makes  $100  a  week.  Salaries 
go  as  low  as  $22.50  and  average  about 
$30.    You  can't  expect  to  get  a  man 

Radio  Today 


with  the  "technical  balance"  out- 
lined above  for  less  than  that,  de- 
pending on  the  living  conditions  in 
your  special  area. 

The  payrolf  part 

The  majority  of  jobbers  pay  their 
counter  men  a  flat  weekly  sum,  but  a 
few  favor  "a  small  commission  on 
the  gross"  along  with  the  fixed  wage. 
Salesmanship  on  jobber  floors  is  of 
course  not  the  highly  developed  sci- 
ence you  find  where  consumers  are 
involved.    Most  customers  know  what 


they  want  when  they  come  in. 
There's  no  occasion  for  flashy  tech- 
nique. For  this  reason  the  sales 
made  by  counter  men  have  a  ten- 
dency to  be  uniform  and  a  commis- 
sion plan  does  not  help  much  except 
to  encourage  the  employes  to  make 
friends  with  the   customers. 

Home  work 

In  training  the  counter  people,  the 
popular  idea  is  that  you  should  in- 
sist on  the  employes  reading  trade 
publications,      catalogs,      engineering 


bulletins  and  new  technical  books. 
Be  sure  that  all  announcements  of 
new  products  are  carefully  taken  in ; 
not  just  the  news  itself,  but  all  the 
applications  and  every-day  signifi- 
cance. 

"The  best  men  study  all  this  stuff 
they  can  get  hold  of,"  concludes  a 
jobber.  This  procedure  adds  popu- 
lar value  to  their  technical  back- 
ground, teaches  them  what  to  expect 
on  their  shelves,  and  gives  them  a 
chance  to  be  alert  while  handling 
customers. 


kk 


CONSUMER  CO-OPS"  HANDLING  RADIO 

Greeley,  Colo.,  Greenbelt,  Wash.,  Wellesley, 
Mass.,  present  new  form  oF  dealer  competition 


"YOU  pay  the  regular  retail  price, 
of  course — that  is  the  co-op  principle. 
But  at  the  end  of  this  quarter,  you 
will  receive  the  regular  20  per  cent 
dividend  on  your  purchases  that  we 
pay.  And  at  the  end  of  the  year,  if 
there  is  a  surplus,  you  will  get  an  ad- 
ditional dividend  on  your  purchase. 
Our  extra  dividend  on  1937  business 
was  6  per  cent." 

If  a  competitor  of  yours,  selling  ra- 
dios, made  a  proposition  like  that  on 
a  nationally-advertised  make,  would 
you  feel  that  you  had  tough  competi- 
tion to  contend  with?  And  yet  Gree- 
ley, Colo.,  radio  dealers  face  exactly 
that  sort  of  situation,  now  that  the 
Consumers  Oil  Co.,  a  local  co-op 
which  on  1937  business  returned  over 
$100,000  in  dividends  to  members,  has 
added  a  radio  line.  The  company  also 
sells  a  nationally-advertised  make  of 
electric  refrigerators,  washers,  and 
vacuum  cleaners. 

Plan  growing 

The  "consumer  co-op"  movement 
has  had  much  publicity  in  recent 
months.  Greenbelt,  near  Washington, 
where  families  with  moderate  incomes 
are  living  in  $16,000  homes  built  by 
the  government,  is  starting  out  with 
co-ops.  Roger  Babson  has  started  a 
co-op  in  Wellesley,  Mass.  It  is  doubt- 
ful, however,  if  co-op  competition 
anywhere  in  radios  will  develop  more 
objectionable  features  than  the  Gree- 
ley situation. 

This  co-op  operates  on  what  is 
known  as  the  Rochdale  Plan,  under 
which  all  sales  are  made  at  regular 
retail  prices,  with  profits  returned  to 


share-holders  in  proportion  to  pur- 
chases made.  Only  one  share  of  stock, 
costing  a  nominal  amount,  is  neces- 
sary to  qualify  for  dividends  which, 
in  recent  years,  have  been  a  standard 
20  per  cent,  paid  each  quarter. 

Thrown  together 

Inquiry  of  the  co-op  elicited  the 
information  that  radio  and  other  elec- 
trical appliance  sales  are  thrown  into 
general  receipts,  along  with  automo- 
tive sales.  There  is  no  separate  cost 
accounting  on  the  radio  department. 
The  dividends  paid  are  the  same  on 
radios  as  on  gas  and  oil. 

Whether  this  procedure  is  valid 
under  the  Colorado  Unfair  Practices 


'And  then  you  get  20  per  cent  back, 
plus  extra  dividends." 


Act  is  a  point  which  is  being  investi- 
gated. Radio  dealers  feel  the  competi- 
tion is  grossly  unfair;  that  the  co-op, 
by  virtue  of  a  gigantic  gas  and  oil 
business,  is  virtually  selling  radio  sets 
below  cost  when  it  makes  on  such  sales 
the  same  dividend-refund  as  on  gas 
and  oil. 

No  advertising 

On  behalf  of  its  electrical  and  radio 
department,  the  co-op  does  no  adver- 
tising, has  no  outside  salesmen.  The 
original  plan  was  strictly  cash,  but  in- 
stalment sales  are  now  being  made. 
An  addition  to  the  super-service  sta- 
tion was  recently  made,  with  the  re- 
sult that  there  is  now  display  space 
for  radio  sets  both  on  the  first  floor 
and  in  a  second-floor  display  room. 


NEW  FLOOR  COVERING 
FOR  RADIO  STORES 

Dealer  A.  S.  Magee  of  Magee  Ra- 
dio Service,  6907  Wisconsin  Ave., 
Bethesda,  Md.,  recently  faced  the 
necessity  of  having  the  floor  of  his 
store  recovered.  They  told  him  about 
a  broad-loom,  made  by  a  new  process 
so  that  it  is  practical  for  store  use, 
so  Mr.  Magee  tried  it. 

"After  covering  the  floor,"  reports 
Mr.  Magee,  "I  found  that  radios  have 
a  remarkably  better  tone  than  with 
linoleum  on  the  floor.  The  carpet  has 
other  advantages,  such  as  keeping 
down  dust,  improving  the  appearance 
of  the  store  and  giving  the  place  a 
novelty  appeal." 


August,  1938 


19 


Fairbanks-Morse  model  7AC 

with    push  -  buttons    for    six 

stations. 


Fada   6A80C   with  all-wave 
coverage    and    P.B.    tuning. 


Zenith's  9S367  features  the  ro- 
bot dial  and  radiorgan  control. 


Motorola   89K1    with   24-hour 

automatic  time  tuning  of  six 

stations. 


FEATURES  AND  SPECIFICATIONS  OF  THE  1039  SETS  -  CpU  by  «,</,„  r.<w 

(Continued  from  July  issue) 


Automatic  Tuning 


Model 
No. 


List 
price 


Cabinet 


Style      Material       bands 


Number  Plug-    Cond.  Watts  Power 

tubes  in       gang  Spkr.  audio  supply 

(RMA  re-        sec-  size  &  power            and 

defin.)  sistor%  tions  type  (Max.)  watts 


Vis- 
Tone      ual 
Selec-    con-     tun- 
tivity     trol       ing 


Re- 

-mote 


Drift  Adjust-  con-  I.F. 

Type    Comp.  No.    ments    trol  AVC       Peak 


Belmont  Radio  Corp.,  1257  FuUerton  St.,  Chicago.  111. — "Belmont"  &  "Freshman  Masterpiece." 


521 
526 
632 
665 
767-M 


NS 
NS 
NS 
NS 
NS 


FT  Plastic  B 

FT       PI.  or  Wood  B 

PC-T      Wood  B 

FT  Wood  B 

VT  Wood  B,S 


5  1 

5-OM  None 
6-0  incl  resistor 
5-OM  None 
7-OM        None 


NS  NS 
2  NS 


5-EE 
6-EE 
6-EE 


NS 
NS 
NS 
NS 
NS 


AC-DC 

AC 

AC 

AC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 
None  None 
None  None 
None  None 
Var      None 


Mech 
Mech 
Mech 
Mech 
Mech 


None 
None 
None 
None 
None 


6  1-F 

5  1-F 

5  1-F 

6  1-F 

6  1-F 


No 
No 
No 
No 
No 


Yes 
Yes 

Yes 
Yes 
Yes 


NS 
465 
470 
465 

NS 


767-C 


Wood 


7-OM        None 


Fixed 


None     Mech       None 


Crosley  Radio  Corp.,  1329  Arlington  St.,  Cincinnati,  Ohio — "Crosley' 


C418B 

C428B 

628B 

718A 

718M 


$  9,99 
12.99 
19.99 
29.95 
49.95 


Halson's   model   A5   is   appropri- 
ately called  the   Dwarf— list  $15 


With  this  1939  Super-feature  Zenith  Radio  tone  performance  begins  .  .  . 
where  radio  .  .  .  even  Zenith  radio  up  to  now  has  stopped.  And  you  can 
prove  this  to  yourself  and  your  customers,  incontestably. 

Do  not  fail  to  operate  Radiorgan  for  yourself  at  your  Zenith  Dis- 
tributor's.You  will  positively  hear  Zenith  tone  go  six  big  definite 
steps  beyond  conventional  radio  tone.' 

You  can  take  the  customer  into  new  realms  of  tone  which  means 
you  can  take  yourself  into  new  realms  of  sales.  Not  a  luxury  feature. 
You'll  find  Radiorgan  begins  on  a  popular -price  Zenith.  1939  Zenith  com- 
pact, table,  console,  chairside  and  combination  models  from  $14.95  to  $350. 


1939  Zenith  is  ten  years  ahead 
with  Radiorgan  as  it  was  in 
1928  with  the  first  automatic 
tuning  ever  put  on  a  home  radio. 


CELEBRATES  1939  LEADERSHIP 
WITH    GIANT   VALUES 


ZENITH    RADIO    CORPORATION,    CHICAGO,    ILL,    U,  S.  A.     •     CABLE    ADDRESS   "ZENITHRAD" 


August,  1938 


21 


e-band  operation  and  push-button 
ig — Fairbanks-Morse  model   7AT. 


Belmont's  model  521  has  mechani- 
cal  type    tuning    for    six    stations. 


American  and  Foreign  tuning  are 
offered   by   this    Arvin    model    78. 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS  CONTINUED  FROM  JULY  ISSUE— Compiled  by  Radio  Toda 


Automatic  Tuning 


Model 
No. 


List 
price 


Cabinet 

Wave- 
Style     Material      bands 


Number 
tubes 
(RMA 
•defin.) 


Plug-   Cond. 

in       gang 

re-       sec- 

sistor%  tions 


Spkr. 
size  & 
type 


Watts 
audio 
power 

(Max.) 


Power 

supply 

and 

watts 


Tone 
Selec-  con- 
tivity     trol 


Vis- 
ual 

tun- 
ing 


Re- 
-mote 


Drift  Adjust-  con- 

Type    Comp.  No.    ments    trol  AVC 


I.F. 
Peak 


International  Radio  Corp.,  Ann  Arbor,  Mich.,  "Kadette",  Information  not  available  up  to  August  10. 
Majestic  Radio  &  Television  Corp.,  2600  W.  50th  St.,  Chicago,  111. — "Majestic." 


12  S   12.95 

52  NS 

Charlie  \  .._ 
McCarthy/  Ns 
ill  NS 

>51  NS 


MT 
MT 

MT 

T 

T 


Wood 
Wood 

Plastic 
Plastic 
Plastic 


B 
B 

B 
B 
B.S 


4-M 
5-M 


None 
None 


6-M  incl.  resistor 
5-G  None 

5-G  None 


3M-EE 
3^-EE 

3J^-EE 
5M-EE 
5H-EE 


40  AC-DC 
45  AC-DC 

45  AC-DC 

40  AC 
40  AC 


Fixed 
Fixed 

Fixed 
Fixed 
Fixed 


None  None 
None  None 

None  None 
None  None 
Step     None 


None 
None 

None 
None 
None 


No 
Yes 

Yes 
Yes 
Yes 


;2A 

NS 

T 

Wood 

B.S 

6-G 

None 

2 

6-EE 

3 

45  AC 

Fixed 

Step 

None 

Mech 

None 

4 

1-F 

No 

Yes 

455 

539 

NS 

CON 

Wood 

B.Si.S 

T-MO 

None 

3 

10-EE 

3 

75  AC 

Fixed 

Var 

None 

Mech 

None 

6 

1-F 

No 

Yes 

455 

529 

NS 

CON 

Wood 

B,S 

6-G 

None 

3 

10-EE 

3 

45  AC 

Fixed 

Step 

None 

Mech 

None 

6 

1-F 

No 

Yes 

455 

'39 

NS 

CON 

Wood 

B.Si.S 

7-MO 

None 

3 

10-EE 

3 

60  AC 

Fixed 

Var 

CR 

Mech 

None 

6 

1-F 

No 

Yes 

455 

•39 

NS 

CON 

Wood 

B.Si.S 

HMO 

None 

3 

10-EE 

3 

75  AC 

Fixed 

Var 

CR 

Mech 

None 

6 

1-F 

No 

Yes 

455 

056  NS  CON  Wood  B,P,S  10-O          None 

058  NS  CON  Wood  B,P,S  10-O          None 

356  NS  CON  Wood  B,P,S  13-0          None 

656  NS  CON  Wood  B.P.S  16-0          None 

Jnited  Motors  Service,  3044  W.  Grand  Blvd.,  Detroit,  Mich. — "Delco.' 

*-1144  $  99.95  CON  Wood  B,P,S  10-OM      None 

t-1143  79.95  CON  Wood  B,P,S  7-OM        None 

*-1142  69.95  CON  Wood  B,S  7-OM        None 

1-1141  39.95  T  Wood  B.S  6-OM         None 


3  10-EE  4H 

3  10-EE  414 

3  12-EE  12 

3  12-EE  15 


3  12-EE 

9  JTwo   1 

2  \8-EE  J 

2  10-EE 

2  6-EE 


4H 
3 


80  AC  Var  Step  CR 

80  AC  Var  Step  CR 

100  AC  Var  Step  CR 

125  AC  Var  Step  CR 

85  AC  Fixed  Var  CR 

75  AC  Fixed  Var  CR 

65  AC  Fixed  Var  CR 


,,  ^     [Expanded!  6     1-R 
MotorJ       1  p        V 
Motor\  Channel  J  8 
Motor  10 

Motor     AFC        12 


1-R 
1-R 
1-R 


65  AC 


It 
It 
It 

Fixed     Var      None     It 


CC 

cc 
cc 
cc 


1-F 
1-F 

1-F 
1-F 


No 
No 

No 


No 
No 

No 


Yes 
Yes 
Yes 


Yes 
Yes 
Yes 


TRF 
455 

455 
455 
455 
455 
455 
455 
455 
455 
455 

455 

455 
455 


465 
465 
465 
466 
465 
465 
465 
465 


t-1140 
<-1139 
t-1135 
{-1134 


29.95  T 

18.95  T 

18.95  T 

16.95  T 


Wood 
Wood 
Plastic 
Plastic 


5-OM        None 
6-0  incl.  resistor 
6-0  incl.  resistor 
6-0  incl.  resistor 


2  6-EE  2Y2 

2  5-EE  2Y2 

2  5-EE  2y2 

2  5-EE  2M 


45  AC  Fixed  Var      None 

45  AC-DC  Fixed  None  None 

45  AC-DC  Fixed  None  None 

45  AC-DC  Fixed  None   None 


Veils-Gardner  &  Co.,  2701  N.  Kildare  Ave.,  Chicago,  111 —"Wells-Gardner"  &  "Arcadia" 


5A1 1-802  NS 
5A1 1-804  NS 
07A15-704  NS 
07A15-768  NS 
07A15-856  NS 


MT 

MT 

T 

CON 

CON 


Plastic 
Plastic 
Wood 
Wood 
Wood 


B 

B 

B,S 

B.S 

B.S 


4-M 
4-M 
7-M 
7-M 
7-M 


1 

1 

None 

None 

None 


5-EE 
5-EE 
8-EE 
8-EE 

8-EE 


45  AC-DC 
45  AC-DC 
50  AC 
50  AC 
50  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

Var  CR 

Var  CR 

Var  CR 


It 

Mech 
Mech 
Mech 


None 

None 

It 

It 

It 


CC  5  1-R 

None  5  1-F 

None  5  1-F 

None  5  1-F 


CC 
CC 
CC 


6  1 
6  1 
6     1 


No 
No 
No 
No 


No 
No 
No 


Yes 
Yes 
Yes 
Yes 


No 
No 
Yes 
Yes 
Yes 


TRF 
TRF 

456 
456 
456 
456 
456 
456 
456 

456 

455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 
455 


09A14-770  NS 
09A1 4-860  NS 
01A12-858  NS 
01A12-756  NS 

D3A3-858    NS 

enith  Radio  Corp.. 


CON  Wood  B,P,S  9-M  None 

CON  Wood  B,P,S  9-M  None 

CON  Wood  B,P,S  11-M  None 

CON  Wood  B,P,S  11-M  None 


D311 
D326 
D312 
D316 
D317 


$  14.95+ 
19.95 
19.95t 
24.95 
29.95 


CON        Wood 
6001  Dickens  Ave., 
FT  Plastic 


VT 
FT 
FT 
FT 


Wood 
Plastic 
Wood 
Wood 


B,P,S 

Chicago,  111.- 

B 

B 

B 

B 

B 


13-M     _    None 
—"Zenith." 
5-OM 
5-0 
5-0 
5-0 
5-0 


10-EE  2H 

10-EE  2H 

12-EE  8 

12-EE  8 

(Two  1 

U2-EE/  20 

5-EE  1.6 

5-EE  1.6 

5-EE  1.6 

5-EE  1.6 

5-EE  1.6 


75  AC 
75  AC 
100  AC 
100  AC 


Fixed 
Fixed 
Fixed 
Fixed 


Var 
Var 
Var 
Var 


CR 
CR 
CR 
CR 


170  AC         Fixed      Var    CR 


AC-DC 
AC-DC 
AC-DC 
AC-DC 
AC-DC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

None  None 

None  Bone 

None  None 


None 

None 

It 

It 

It 


CC 
CC 
CC 
CC 


None  1-F 
None  1-F 
None   1-F 


No 
No 
No 
No 


No 
No 
No 


Yes 
Yes 
Yes 
Yes 


Yes 
Yes 
Yes 
Yes 
Yes 


R312 
R316 
R317 
5319 
5327 


19.95+ 

24.95 

29.95 

29.95 

29.95 


FT 
FT 
FT 
FT 
VT 


Plastic 

Wood 

Wood 

Wood 

Wood 


B 

B 
B 

B,S 
B.S 


5-0 
5-0 
5-0 
5-0 
5-0 


None 
None 
None 
None 
None 


2  5-EE  3H 

2  5-EE  3H 

2  5-EE  31/3 

2  5-EE  3 

2  6-EE  3 


AC 
AC 

AC 
45  AC 
45  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 
None  None 
None  None 
None  None 
None  None 


None  1-F 
None  1-F 
None  1-F 
None  1-F 
None  1-F 


No 
No 
No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


5320 
5330 
5321 
5322 
5323 


34.95 
39.95 
44.95 
49.95 
59.95 


FT 
VT 
FT 
FT 
FT 


Wood 
Wood 
Wood 
Wood 
Wood 


B.S 
B,P,S 

B.Si.S 
B.Si.S 
B.Si.S 


5-0 
6-0 
6-0 
6-0 
7-0 


None 
None 
None 
None 
None 


2  6-EE  3 

2  6-EE  4H 

2  6-EE  4^ 

2  6-EE  4M 

2  8-EE  4H 


45  AC 
65  AC 
65  AC 
65  AC 
65  AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None  None 

None  None 

None  None 

None  None 

Yes  CR 


None  1-F 
None  1-F 
None  1-F 
None  1-F 
None    1-F 


No 
No 
No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


5324 
D336 
3337 
«37 
1338 


89.95 
19.95 
29.95 
29.95 
39.95t 


FT 
CS 

CS 
CS 
CS 


Wood 
Wood 
Wood 
Wood 
Wood 


B,Si,S 
B 


B 
B.S 


9-0 

6-0  incl. 
6-0  incl. 
5-0 
5-0 


None 
resistor 
resistor 
None 
None 


3  8-EE 

2  5-EE 

2  5-EE 

2  5-EE 

2  6-EE 


4K 
1.6 
1.6 
3H 
3 


75  AC 

AC-DC 

AC-DC 

AC 

AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


Yes      CR 

None  None 
None  None 
None  None 
None  None 


It 

None 

It 

It 

It 


CC 
CC 

cc 


None  1-F 

"'4     i_F' 

4  1-F 

5  1-F 


No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


339  M 
340 

;34i 

342 
S343 


49.95 
49.95 
59.95 
69.95 
99.95 


CS 
CS 
CS 
CS 
CS 


Wood 
Wood 
Wood 
Wood 
Wood 


B,S 

B,Si,S 
B,Si,S 
B,Si,S 
B.Si.S 


5-0 
6-0 
6-0 
7-0 
7-0 


None 
None 
None 
None 
None 


6-EE 

6-EE 

8-EE 

10-EE 

10-EE 


3 

4H 
4H 
4H 
4H 


AC 
AC 
AC 
AC 
AC 


Fixed 
Fixed 
Fixed 
Fixed 
Fixed 


None   None 
None   None 
None   None 
Yes      CR 
Yes      CR 


CC 
CC 
CC 
CC 
CC 


1-F 
1-F 
1-F 
1-F 
1-F 


No 
No 
No 
No 
No 


Yes 
Yes 
Yes 
Yes 
Yes 


455 
455 
455 
455 
455 
455 
455 
455 
455 
455 


344               99.95       CS            Wood  B,Si,S              9-0             None            3     10-EE  4H  AC  Fixed  Yes  CR  It 

5345  149.95      CS           Wood  B.Si.S              12-0          None           3     12-EE  15  AC  Fixed  Yes  CR  It 

5346  199.95       CS            Wood  B.Si.S              15-0           None            3     12-EE  30  AC  Fixed  Yes  CR  It 
)360              29.95       CON        Wood  B                      6-0  incl.  resistor          2     6-EE  1.6  AC-DC  Fixed  None  None  None 
361              49.95      CON       Wood  B.P.S              6-0            None           2     10-EE  4H  AC  Fixed  None  None  It 

(Continued  on  page  44) 

n  light  natural  wood,  $3  additional.  +Brown  plastic.  Ebony  or  Ivory,  $3  additional. 


CC 
CC 

cc 
cc' 


1-F 
1-F 
1-F 


No  Yes 
No  Yes 
No       Yes 

Yes 

No       Yes 


Line  voltage  dropping  resistors  of  plug-in  type,  commonly  referred  to  as  ballast  resistors  or  tubes. 


22 


Index  to  codes  on  page  44 


Radio  Today 


YOUR      EAR      WILL     TELL     THE      DIFFERENCE 


FAIRBANKS-MORSE 
RADIOS 


If  you  want  a  radio  line 
that  is  built  for  those  who  insist  that 
their  radios  be  truly  fine  musical  instru- 
ments— that  takes  you  miles  away  from 
price  competition,  novelty  cabinets, 
trick  dials,  and  gadgets  —  that  gives  a 
new  thrill  to  listening  — 

If  you  want  to  fill  every  demand  of 


the  profitable  type  of  buyer  from  a  small 
number  of  models  and  put  your  profit 
in  the  bank  instead  of  into  stock  — 

Write  or  wire  for  details.  Fairbanks, 
Morse  &  Co.,  Home  Appliance  Division, 
2060  Northwestern  Ave.,  Indianapolis, 
Indiana. 


A     TRU  LY 


9-Tube  Console  Grand  illustrated,  I\o.9CG 

Features  of  the  NEW  F-M  Line 

which  includes  table,  console, 
and  console-grand  models 
with  7-,  9-,  and  12-tube  chassis 

•  Instant  Electric  Tuning  •  Acousti- 
Sealed  Tone  Chamber  •  Monitor 
Panel  •  Complete  Permeability 
Tuning  •  Cabinetry  of  highest 
quality  with  interlocking  construc- 
tion •  Clearer  and  stronger  short- 
wave reception  •  Plus  the  most 
startlingly  realistic  tone  you  have 
ever  heard  in  a  radio. 


FAIRBANKS-IWRSE   RADIO 


RADIO 


August,  1938 


23 


NEW  THINGS 

Latest   news   of  radio   products    from   manufacturers 


Torpedo  crystal  mike 


■*•  Low-cost  crystal  microphone. 
Free  from  peaks.  Semi-directional 
pick-up.  Output  level  of  — 60  DB. 
Finished  in  chrome,  aircraft  alumi- 
num, and  telephone  black.  Turner 
model  55— List  $15.95.  The  Turner 
Co.,  Cedar  Rapids,  Iowa — Radio  To- 
day. 


Replacement  coils 

+  Coil  repair  and  duplicating 
service.  Coils  either  repaired  and 
restored  to  original  condition  or 
duplicated.  For  both  I.F.  and  R.F. 
coils  for  any  make  of  receiver.  Just 
send  remains  of  coil  with  shield  or 
shield  dimensions.  Specify  make  of 
set  and  type  of  coil,  together  with 
I.F.  frequency.  Average  cost  $1.50. 
J.  W.  Miller  Co.,  5917  S.  Main  St., 
Los  Angeles,  Cal. — Radio  Today. 


25-watt  speaker 

*  Directional  type  speaker  for 
outdoor  and  indoor  installations. 
Weighs  only  19%  pounds.  Handles 
25  watts.  Frequency  range  is  140 
to  8,000  cycles.  Distribution  angle 
of  50°.  29%  inches  overall  and 
18y2-inch  bell.  Type  MI-6260— list 
$89.  RCA  Mfg.  Co.,  Front  St.,  Cam- 
den, N.  J. — Radio  Today. 


Remote  control  tube 

*  Gas-filled  triode  tube  which 
may  be  used  as  an  extremely  sensi- 
tive detector  of  high-frequency  sig- 
nals. Can  be  operated  in  standard 
self-quenching  super-regenerative 
circuit    at    ultra-high    frequencies. 


Sensitive  relay  replaces  usual  head- 
phones. A  number  of  these  tubes 
can  be  operated  at  different  fre- 
quencies so  as  to  perform  different 
functions.  Type  RK  62.  Raytheon 
Production  Corp.,  420  Lexington 
Ave.,  New  York,  N.  Y  —  Radio  To- 
day". 


G-E  test  equipment 

*  Complete  line  of  radio  servic- 
ing equipment  including  signal  gen- 
erator (illustrated),  tube  checker, 
multi-meter,  tube  and  set  tester, 
oscillograph  and  frequency  modula- 
tor. Type  SG-1  all-wave  oscillator 
has  a  jumbo  direct-reading  dial. 
Fundamental  range  of  100  to  31,000 
KC.  Output  of  .1  volt  on  all  bands. 
400  cycle  modulation.  General  Elec- 
tric Co.,  1285  Boston  Ave.,  Bridge- 
port, Conn. — Radio  Today. 


Instrument  tap  switches 

■*•  Line  of  tap  switches  with 
positive  contact  and  low  noise 
levels.  Standard  units  for  any 
current  up  to  60  amps.  Small  units 
for  use  where  space  is  premium. 
Mycalex  or  hard  rubber  insulation. 
Single  and  multiple  deck  units. 
Described  in  bulletin  381.  Tech 
Labs.,  7  Lincoln  St.,  Jersey  City, 
N.  J. — Radio  Today. 


Silvered  mica  condenser 

■*•  Low-loss  mica  condenser  that 
maintains  a  constant  capacity.  Can 
be  had  to  within  1%  of  specified 
capacity.  Silver-coated  mica  plates. 
Ceramic  case  entirely  moisture- 
proofed.  All  sizes  up  to  .01  mfd. 
Dumont  Electric  Co.,  516  Broadway, 
New  York,  N.  Y. — Radio  Today. 


All-metal  rheostat 

+  25-watt  rheostat  which  can 
be  operated  at  full  rating  down  to 
hi  of  full  rotation.  Resistance  ele- 
ment wound  on  aluminum  core  in- 
sulated by  asbestos.  Layers  off  mica 
insulate  the  element  from  die-cast 
aluminum  housing.  Smooth  resist- 
ance variation  at  all  points.  Type 
PR-25.  International  Resistance 
Co.,  401  N.  Broad  St.,  Philadelphia, 
Pa. — Radio  Today. 


Resistor  and  condenser  bridge 

*  Bridge  type  condenser  and  re- 
sistor tester.  Measures  capacity 
from  .0001  to  100  mfd.  and  power 
factors  up  to  50  per  cent.  Resistance 
values  from  10  ohms  to  1  megohm. 
Also  measures  insulation  resistance 
of  condensers.  Continuously  vari- 
able power  supply  from  15  to  600 
volts.  Provides  a  vacuum  tube  volt- 
meter, voltmeter,  and  milliammeter 
for  external  uses.  Complete  with 
tubes  $35.75  net  .Aerovox  Corp.,  70 
Washington  St.,  Brooklyn,  N.  Y  — 
Radio  Today'. 


Low-loss  socket 

-A-  Super-MIP  sockets  specially 
designed  for  high-frequency  use. 
Made  of  molded  Polystrene,  a  trans- 
parent low-loss  material.  Power 
factor  less  than  1/1500  of  the  best 
bakelite.  Low  dielectric  constant- 
high  tensile  and  dielectric  strength. 
Available  in  octal  type  only.  Type 
54-8 — list  50  cents.  American  Phe- 
nolic Corp.,  1250  W.  Van  Buren  St., 
Chicago,  111. — Radio  Today. 


24 


Radio  Todav 


STEWART-WARNER  CORPORATION 
1828  Diversey  Parkway,  Chicago,  Illinois 

Without  obligation  please  rush  further  informatioi 
prices  and  discounts  on  your  new  '  Varsity"  radio: 


Na 


Company— 


Address  - 
City 


It's   a   sensation   everywhere   it's   shown!   A   brand  new- 
idea  in  radio  that's  already  playing  chimes  on  dealers' 
cash  registers.  A  powerful  mellow-toned  genuine  super- 
heterodyne with  moulded  cabinet  in  authentic  colors 
any   school    or    college,    individualized    with    the 
school  letter  —  a  radio  that  every  student  from  high 
school   freshman   to    college   senior   will    be    crazy 
about  .  .  .  and  priced  so  they  can  have  it!  A  real 
value,  too  —  with  4-station  Push-button  Automatic 
Tuning — AC-DC  circuit  —  genuine  dynamic 
...    speaker  —  and  calibrated  dial  ...  all  at  a  list 
price    of    less    than    $20.00!    Write,    wire    or 
I'  phone  for  details. 

Stewart -Warner  Corporation,  Chicago,  111. 

— -.- 


August,  1938 


MAGIC  KEYBOARD  RADIOS 


25 


MORE  NEW  THINGS 


Communications  receiver 

■*•  Six-tube  amateur  communica- 
tions receiver.  Tunes  540-40,000 
KC.  Ceramic  coil  forms,  electrical 
band  spread.  Iron-core  I.F.  trans- 
formers. Beat-frequency  oscillator. 
Built-in  dynamic  speaker.  Model 
430.  Howard  Radio  Co.,  1731  Bel- 
mont Ave.,  Chicago,  111. — Radio  To- 
day. 


Auto   radio   cable 

■*•  Cable  for  auto-radio  use 
which  incorporates  many  outstand- 
ing advantages,  among  these  being 
stability  under  all  weather  condi- 
tions, a  new  type  insulation  with 
extremely  high  "Q"  and  low  capac- 
ity, and  a  weather-proof  braid.  Any 
number  of  conductors  may  be  used, 
including  R.  F.  and  control  leads. 
Lenz  Electric  Mfg.  Co.,  1751  N. 
Western  Ave.,  Chicago,  111. — Radio 
Today. 


Liquid  compensator 
condensers 

■*•  Liquid  compensating  condens- 
ers designed  to  have  a  capacity  de- 
crease with  a  rise  in  temperature. 
Effect  obtained  as  the  result  of  the 
action  of  a  liquid  dielectric.  Me- 
chanically stable  and  returns  to  a 
given  value  at  a  given  temperature. 
Completely  sealed.  Sprague  Special- 
ties Co.,  North  Adams,  Mass. — Ra- 
dio Today. 

Transcription  needle 

•*•  Long-life  needle  designed  for 
the  reproducing  laterally-cut  tran- 
scription readings.  Keeps  surface 
noise  to  a  minimum.  Each  needle 
shadowgraphed  twice.     Will   repro- 


duce several  programs  satisfac- 
torily— although  it  is  recommend- 
ed that  it  be  used  for  only  2  15- 
minute  programs.  RCA-Victor  No. 
1  transcription  needle.  RCA  Mfg. 
Co.,  Cooper  St.,  Camden,  N.  J. — 
Radio   Today. 


Recording  head 

*  Full-frequency  cutting  head 
for  recording  machines.  Standard 
equipment  on  all  new  Universal 
recorders.  All  precision  metal  con- 
struction. Records  frequencies  from 
30  to  10,000  cycles.  Operates  from 
15-ohm  line.  Input  level  of  only 
plus  14  DB  required.  De-hydrated 
and  impregnated  coils.  Universal 
Microphone  Co.,  Inglewood,  Calif. — 
Radio  Today. 


Hickok  signal  generator 

it  All-wave  signal  generator  tun- 
ing 100  to  30,000  KC.  Over  100 
inches  of  direct  reading  scales.  Au- 
dio output  variable  from  100  to  10,- 
000  cycles.  Frequency-modulated 
output  (30  KC  sweep)  for  visual 
alignment.  Model  18  illustrated  has 
3-range  output  meter.  Model  17  same 
as  18  except  for  omission  of  power 
level  meter.  Hickok  Electrical  In- 
strument Corp.,  Cleveland,  Ohio. — 
Radio  Today. 


Dry-disc  rectifiers 

*  Magnesium  -  copper  sulphide 
type  of  dry  rectifier.  Types  are 
available  for  outputs  of  one  to  20 
volts  and  %  to  20  amperes.  Higher 
outputs  may  be  obtained  by  simple 
series  or  parallel  connections.  De- 
scribed in  catalog  R-610.  P.  R.  Mal- 
lory  &  Co.,  Inc.,  Indianapolis,  Ind. 
— Radio  Today. 


School  sound  system 

•k  Low-cost  sound  system  for 
schools  having  up  to  20  rooms.  In- 
cluded in  system  are:  master  con- 
trol, unit  amplifiers,  ten  loud- 
speakers and  cabinets,  microphone 
and  stand.  Separate  radio  set  and 
phone  can  be  used  with  system.  Re- 
turn speech  and  call-in  feature  at 
additional  cost.  Model  T  E  S.  Ope- 
radio  Mfg.  Co.,  St.  Charles,  111  — 
Radio  Today. 


Audio  oscillator 

*  Beat-frequency  type  of  audio 
oscillator,  0-13,500  cycles  calibrated 
on  separate  graph.  Output  voltage 
constant  within  15%  over  whole 
frequency  range.  Harmonic  con- 
tent above  100  cycles  is  2%.  Below 
100  cycles  harmonics  increase  to 
10%  at  23  cycles.  Hum  level  55 
DB  below  maximum  output.  Type 
VC-1— ?37.50.  Televiso  Co.,  341  N. 
Pulaski  Rd.,  Chicago,  111. — Radio 
Today. 


Direct  reading  bridge 

*  Capacity,  inductance,  and  re- 
sistance bridge.  Measures  condens- 
er values  from  .0001  to  50  mfd.  and 
leakage  up  to  10  megs  on  direct 
reading  scales.  Inductance  meas- 
ured from  10  to  4,000  millihenries. 
Resistance  measurements  from  % 
ohm  to  1,000  megohms.  Built-in 
power  supply.  Bridgemaster  type 
10— net  $29.50  with  tubes.  John 
Meek  Instruments,  164  N.  May  St., 
Chicago,  111. — Radio  Today. 


Recticharger 

+  Automatic  battery  charger  for 
keeping  a  bank  of  batteries  fully 
charged.  Uses  copper  oxide  type 
rectifier  unit.  Saturated-core  re- 
actor type  of  control  provides  rapid 
charge  during  periods  of  high  drain 
and  minimum  charge  during  no- 
load  periods.  For  all  popular  bat- 
tery voltages.  Raytheon  Mfg.  Co., 
144  Willow  St.,  Waltham,  Mass.— 
Radio  Today. 


26 


Radio  Today 


NEW    ARVIN 
PUSH    BUTTON 

AC  Model  68    .    .    .    $24.95  list 

Powerful  5-tube  AC  superhetero- 
dyne with  6  push  button  auto- 
matic tuning.  Has  special  Arvin 
"station  variator"  which  increases 
tuning  range  to  18  or  24  stations. 
Electro-dynamic  speaker.  Modern 
walnut  plastic  cabinet  111?'  high, 
8"  wide,  6li'r  deep. 


rij  / 


* 


TWO    STREAMLINED 
PLASTIC    RADIOS 
in  a  choice  of  colors 


Full  sized  table  radios  ll.1^  wid 
8"  high,  6}£ff  deep.  Powerfu 
superheterodynes  using  5  tubes, 
plus  ballasttube.  Operate  on  AC 
or  DC  current.  Electro-dynamic 
speaker. 

Model  58A  in  ivory 

at  left U9.95  list 

Model  58  in  ebony  black 

below U6.95 


; 


,.  t 


EA.UTIFUL  RECEPTION 


Right — New  Arvin 
Model  88  with 
lid  raised  to 
show  phonograph 
turn  table. 


NEW  ARVIN  Radio-Phonograph 
AC  Model  88  .   .  $39.95  list 

You  can  cash  in  on  the  popularity 
of  radio-phonograph  with  this 
table  model.  Improved  pick-up 
reproduces  voice  and  musical  re- 
cordings beautifully  through  the 
Arvin  circuit.  Plays  10"  and  12" 
records.  Has  6-tube  superhetero- 
dyne circuit  with  6"  electro-dy- 
namic speaker.  Provides  fine  se- 
lectivity and  splendid  tonal  range. 

NEW  ARVIN  Push  Button 

AND  DIAL  TUNING 

AC  Model  78  .   .  *29.95  list 

A  powerful  broadcast  and  short 
wave  superheterodyne  receiver 
with  full  electro-dynamic  speaker, 
covering  540-1750  kc.  and  5.75- 
18.0  mc.  Combines  the  conve- 
nience of  4-station  push  button 
tuning  fora  few  preferred  national 
chain  stations  and  the  flexibility 
of  dial  tuning  for  general  station 
coverage.  Cabinet  9"  high,  \Az/i" 


stt  WES*  ««  *■  f 


jmti^kmiam 


MODERN  STYLING 

ATTRACTIVE  PRICES 

BEAUTIFUL  RECEPTION 


•  These  new  Arvins  are  fine  radios — qual- 
ity sets  in  every  detail  of  appearance  and 
performance.  They  are  not  to  be  confused 
with  the  many  midget  radios  on  the  market 
today. 

Five  models,  including  the  radio-phonograph, 
meet  the  demand  of  thousands  of  users — giving 
you  the  sales  appeal  of  push  button  tuning,  dial 
tuning  or  a  combination  of  both  in  table  radios. 
You  can  sell  these  new  Arvins  in  volume — they're 
so  reasonably  priced. 

The  modernistic  gold  foil  display,  shown  above, 
with  the  new  plastic  Arvins  is  a  honey  of  a  mer- 
chandiser. This  window-counter  display  catches 
the  eye — and  really  glorifies  the  new  streamlined 
sets.  The  display  is  free  with  an  order  for  any  three 
table  radios.  Ask  your  jobber.  Noblitt-Sparks 
Industries,  Inc.,  Columbus,  Indiana. 


Prices  slightly  highe 


!  South  and  West. 


ASK    FOR   CATALOG    Nnerf"^"^^!.! 

consoles,  chairside  radios   and    battery  radios. 


MORE  NEW  THINGS 


Philco  oscilloscope 

*  Self-synchronizing  cathode 
ray  oscilloscope.  Designed  for 
checking  through  a  radio  set  to 
overcome  hum,  locate  trouble  in  all 
parts  of  the  receiver,  and  for  de- 
tecting distortion.  Has  built-in 
linear  sweep  circuit.  Model  022 — 
net  $42.  Philco  Radio  &  Television 
Corp.,  Tioga  St.,  Philadelphia,  Pa  — 
Radio  Today. 


Facsimile  receiver 

*  Attachment  for  receiving  fac- 
simile transmission  on  an  ordinary 
radio  set.  Prints  on  a  continuous 
paper  strip  about  4  inches  wide.  Re- 
quires at  east  3  watte  audio  output 
for  operation.  Self-synchronizing — 
can  be  built  for  use  on  any  type  of 
power  supply.  Finch  Telecommuni- 
cations Labs.,  Inc.,  37  W.  57th  St., 
New  York,  N.  Y. — Radio  Today. 


Community  antenna  system 

*  Antenna  foundation  kit  for 
multiple  antenna  installations. 
Lightning  arrester  built  into  an- 
tenna coupling  unit  simplifies  in- 
stallation time.  Refined  antenna- 
ground  circuit  eliminates  loss  of 
signal  strength.  Noise  ratio  re- 
duced 25  to  30  per  cent  in  both  AC 
and  DC  houses.  Technical  Appliance 
Corp.,  17  E.  16th  St.,  New  York, 
N.   Y—  Radio  Today. 


Carrier  type  phone  system 

*  Intercommunicating  telephone 
system  using  carrier  principle 
whereby  signals  are  carried  over 
the  power  line  circuits.  Both  two 
station   and   fully   selective   master 


systems  available.  Uses  conven- 
tional telephone  handset  for  pri- 
vacy. No  talk-listen  switch  is 
needed.  Model  A  lists  for  $50  per 
unit  installed.  Frocraft  Corp.,  12  E. 
41st  St.,  New  York,  N.  Y—  Radio 
Today. 


Jensen  12-inch  speakers 

*  Complete  line  of  12-inch  P.M. 
speakers  for  covering  all  require- 
ments. Speakers  vary  in  sensitivity, 
power  handling  capacity,  and  re- 
sponse characteristics.  List  $9.85  to 
$34.75.  Jensen  Radio  Mfg.  Co., 
6601  S.  Laramie  Ave.,  Chicago,  111. 
— Radio  Today. 


Break-in  relay 

*  Change-over  relay  for  phone 
transmitters  desiring  push-to-talk 
operation.  Relay  switches  antenna 
from  transmitting  to  receiving,  con- 
nects receiver  plate  circuit,  and 
opens  oscillator  plate  primary. 
Midget  types  for  110  AC  or  6  volts 
DC.  Heavy  duty  types  for  110  or 
220  AC  or  6  volts  DC.  Ward  Leon- 
ard Electric  Co.,  Mt.  Vernon,  N.  Y. 
— Radio  Today. 


School  sound  system 

*  Compact,  centralized  sound 
system  for  schools  that  handles  up 
to  40  rooms.  Unit  completely  self- 
tontained.  Transmits  microphone 
programs,  radio  broadcasts,  or  re- 
cordings from  separate  phono  unit. 
Includes  separate  communication 
system  for  2-way  conversation 
simultaneously  with  regular  pro- 
gram. Model  S-40.  "Webster  Co.,, 
5622  Bloomingdale  Ave.,  Chicago, 
111. — Radio  Today. 


2-inch  cat-ray  'scope 

*  Low-cost  cathode-ray  oscillo- 
scope with  2-inch  tube.  Has  all 
controls  on  the  panel.  Sensitivity 
of  y2  rms  volt  per  inch  with  max- 
imum amplifier  gain.  Special  tilt 
mounting  of  the  tube.  Model  151-2 
—net  $49.95.  RCA  Mfg.  Co.,  Front 
&  Cooper  Sts.,  Camden,  N.  J. —  Ra- 
dio Today. 

Wide-angle  reflexed  horn 
speaker 

*  Loudspeaker  for  use  where 
wide-angle  distribution  is  needed. 
Storm-proof  construction.  Uses  re- 
flex principle  so  that  a  6-foot  acous- 
tic column  is  obtained  with  an 
overall  length  of  3  feet.  Rectan- 
gular bell  opening  48  x  14  inches. 
Uses  P.M.  speaker  unit.  180°  angle 
of  distribution.  Model  W.R..  Uni- 
versity Labs.,  191  Canal  St.,  New 
York,  N.  Y.— Radio  Today. 


Clough-Brengle  AC  bridge 

*  Condenser  and  resistance 
bridge  using  cathode-ray  tuning 
eye  indicator.  Three  capacity 
ranges  from  1  mmfd.  to  100  mfds. 
Resistance  ranges  from  10  ohms  to 
500  megs.  Measures  power  factor 
of  electrolytics  from  0  to  50  per 
cent  and  transformer  turns  ratios 
from  .01  to  100.  Sturdy  collapsible 
tilt-leg  contributes  to  convenience 
of  operating  and  reading.  Clough 
Brengle  Co.,  2815  W.  19th  St.,  Chi- 
cago,   111. — Radio   Today. 

Low-drain  battery  tubes 

*  Line  of  tubes  designed  to 
operate  directly  from  a  dry  cell. 
Filament  rated  at  1.4  volts.  50 
milliampere  filament  drain.  Power 
output  pentode  type  1A5G  has  .1 
watt  output  at  90  volts.  Other 
types  are  1A7G  converter,  1H5G 
diode-triode,  1N5G  r-f  pentode. 
Type  1C5G  is  a  power  pentode  with 
240  Mw.  output — filament  rating  of 
.1  amp.  Hygrade  Sylvania  Corp., 
500  Fifth  Ave.,  New  York,  N.  Y.— 
Radio  Todat. 


28 


Radio  Today 


\S?      CHECK  THESE  RADIO 
VALUES   AND  YOU'LL 

*  yyDOUBLE  CHECK 

THE  PROFIT  POSSIBILITIES 


Unprecedented  radio  values! 
That's  the  story  in  a  nutshell  of 
the  new  1939  Westinghouse  Pre- 
cision Radios. 

Never  before  have  so  many  out- 
standing features  been  offered  to 
the  radio  buying  public  at  prices 
as  low  as  Westinghouse  has  set 
this  year. 

The  line  is  complete,  from  pre- 
cision built  table  models  to  a 
phonograph  combination  and 
deluxe  consoles.  Every  cabinet 
styled  by  America's  foremost  de- 
signers. Every  set  provides  per- 
formance that  backs  up  every- 
thing you  say  about  it. 


Here  is  a  line  that  you  can  sell 
in  volume  at  substantial  profit. 

Furthermore — Westinghouse 
offers  you  a  completely  new  and 
resultful  merchandising  pro- 
gram for  your  local  use.  Hard- 
hitting cooperative  newspaper 
advertising  .  .  .  colorful  floor  and 
window  displays  .  .  .  consumer 
folders  and  other  helps  with 
PROVED  sales-getting  features. 

It  will  pay  you  to  get  complete 
details  of  this  remarkable  bine 
and  merchandising  program. 
Call  your  local  Westinghouse 
Representative  today ! 


MODEL  WR-368  MODEL  WR-256  MODEL  WR-258 

Merchandise   Headquarters  —  Westinghouse  Radio  —  150    Varick  Street  —  New  York   City 


Westinghous^fejio 


August,  1938 


29 


MORE  NEW  THINGS 


Zero  current  voltmeter 

*  Mult-range  meter  with  zero 
current  voltmeter  with  0/10/50/250 
volt  ranges.  AC  and  DC  volts  at 
1,000  ohms  per  volt  of  0/10/50/250/- 
500/2,500.  Current  scales  of  0/%/l/- 
5/50/500  milliamperes.  0-1  AC  mils. 
Five  resistance  ranges  from  .05 
ohms  to  10  megs.  Five  ranges  of 
capacity  covering  .0001  to  200  mfd. 
Model  4,900  S.  Hickok  Electrical 
Instrument  Corp.,  DuPont  Ave., 
Cleveland,   Ohio. — Radio  Today. 


Drill  and  grinder  set 

*  Small,  low-cost  electric  drill 
and  electric  grinder  in  metal  case 
with  assortment  of  grinding  tools. 
Drill  operates  at  1,000  r.p.m.  with 
%-inch  drill,  which  is  the  maxi- 
mum capacity.  Grinder  operates  at 
20,000  r.p.m.  Units  ideal  for  radio 
repair  and  construction  work.  Com- 
plete outfit— list  $14.95.  Speedway 
Mfg.  Co.,  1834  S.  52nd  Ave.,  Cicero, 
111. — Radio  Today. 


Willard  dry  batteries 

■*•  Complete  line  of  dry  batteries 
which  includes  flashlight  cells, 
radio  A,  B,  and  C  batteries,  dry 
cells,  and  lantern  batteries.  Speci- 
fications and  performance  exceed  re- 
quirements of  U.  S.  Bureau  of 
Standards.  Willard  Storage  Battery 
Co.,  Cleveland,  Ohio. — Radio  Today. 


Compact  5-watt  amplifier 

*  5  to  8  watt  amplifier  having 
dual  input  channels  for  mike  and 
phonograph  pick-up.  Variable  tone 
control.  Maximum  gain  of  120  DB 
with  microphone.  As  a  complete 
system  amplifier  is  supplied  with 
one  8-inch  PM  speaker,  choice  of 
mike  and  all  necessary  cables.  Type 
848-T.  Wholesale  Radio  Service 
Co.,  100  Sixth  Ave.,  New  York,  N. 
Y. — Radio  Today. 


Record  lubricant 

*  Compound  for  prolonging  the 
life  of  phonograph  records.  Applied 
directly  to  the  record  surface.  Two- 
ounce  bottle — list  35  cents;  8-ounce 
bottle,  75  cents.  Nash  Radio  Prod- 
ucts Co.,  5437  Lisette  Ave.,  St. 
Louis,  Mo. — Radio  Today. 


Pocket  multimeter 

*  Switch-type  volt-ohm-milliam- 
meter  in  solid  mahogany  case  with 
removable  cover.  5  DC  voltage 
ranges  up  to  2,500  volts  at  5,000 
ohms  per  volt.  4  DC  current  ranges 
to  1  amp.,  3  AC  ranges  up  to  1,000 
volts.  Resistance  ranges  of  1,000 
and  2  megs.  3-inch  square  meter. 
H.  J.  Bernard,  319  Third  Ave., 
Brooklyn,  N.  Y. — Radio  Today. 


Electric  phonograph 

*  Smallest  self-contained  elec- 
tric Victrola  ever  built.  Unit  plays 
10  and  12-inch  records.  Crystal  type 
pick-up,  3-tube  amplifier  and  dy. 
namic  speaker.  Cabinet  measures 
only  3  inches  high  and  10  inches 
deep.  May  also  be  converted  to  play 
records  over  any  radio  set,  thereby 
taking  advantage  of  the  set's  am- 
plifier and  speaker  system.  Model 
R-89— list  $24.50.  RCA  Mfg.  Co., 
Camden,   N.  J. — Radio  Today. 


TRADE  FLASHES 


David  E.  Johnson,  formerly  presi- 
dent of  the  Dayrad  Company  and  for 
the  past  three  years  sales  manager  of 
the  radio  test-equipment  division  of 
the  Bendix  organization,  has  been  ap- 
pointed sales  manager  of  the  Dayton 
Acme  Co.  of  Cincinnati,  Ohio,  manu- 
facturers of  radio  test  equipment.  This 
company  has  been  manufacturing  in- 
struments for  service  and  laboratory 
use  for  the  past  eight  years,  and  has 
just  announced  an  unusual  tube  tester 
which,  it  points  out,  has  outstanding 
exclusive  features. 


Ranking  oflacials  of  the  U.  S.  War 
Dept.  attended  a  demonstration  of  one 
of  the  largest  mobile  sound  systems  in 
the  country  recently  at  Ft.  Meyer,  Va., 
when  RCA  showed  them  the  new  high 
powered  outfit  just  procured  by  the 
Signal  Corps  of  the  Army.  The  unit  is 
capable  of  covering  100,000  persons, 
under  the  normal  operating  conditions. 


Sales  manager  Charles  B.  Shapiro  of 
Howard  Radio  Co.  was  a  recent  guest 
at  two  radio  showings  in  the  Pacific 
coast  area,  at  the  Town  House,  Los 
Angeles,  and  at  Seattle  Radio  Co., 
Howard  jobbers  for  Washington  state. 
At  the  former  spot,  plans  were  made 
for  complete  installation  of  Howard 
armchair  sets. 

W.  Bert  Knight,  115  W.  Venice 
Blvd.,  Los  Angeles,  has  been  named 
representative  for  the  firm's  communi- 
cation receivers  in  California,  Nevada 
and  Arizona. 

New  representative  for  Technical 
Appliance  Corp.  in  Logan,  Utah,  is 
Ronald  G.  Bowen.  For  Taco,  Mr.  Bowen 
will  cover  Utah,  Colorado,  Indiana, 
southern  Wyoming  and  northern  New 
Mexico. 

John  Yassos,  who  designs  radios  and 
other  products  for  RCA,  was  recently 
appointed  chairman  of  the  organiza- 
tion committee  of  the  American  De- 
signers Institute,  at  a  meeting  in  Chi- 
cago. 


H.  L.  Weisourgh,  who  is  in  charge 
of  sales  for  the  Brunswick  radio  divi- 
sion of  Mersman  Bros.  Corp.,  is  now 
busy  organizing  a  group  of  sales  ex- 
perts for  marketing  his  firm's  new  line 
of  radios  and  phonograph-radios,  re- 
cently introduced  in  a  complete  line 
of  authentic  period-style  cabinets.  Ex- 
ecutive sales  headquarters  for  Bruns- 
wick have  been  established  at  the  New 
York  Furniture  Exchange,  206  Lex- 
ington Ave.,  New  York  City,  where  a 
full  set  of  samples  are  on  display,  and 
a  sound  proof  demonstration  room  has 
been  opened.  Mr.  Weisburgh  has  an- 
nounced that  distribution  of  the  new 
receivers  will  be  on  a  "direct  selling 
basis,"  with  no  distributors  involved; 
jobber  discounts  will  be  available  to 
direct  accounts.  To  eliminate  price- 
cutting,  all  models  will  be  listed  un- 
der all  Fair  Trade  acts. 

F.  E.  Behrendt  of  Recoton  Corp., 
New  York  City  makers  of  special  steel 
alloy  phonograph  needles,  has  left  with 
his  wife  for  a  2-month  business  trip  to 
England,  Holland,  France  and  Switzer- 
land. 


30 


Radio  Today 


THE    INSTRUMENTS 

which  make 

any  Service   Bench 
Complete 


WESTON  Model  776 
all  wave,  hand-calibrated  Oscillator 


WESTON  Model  772 

Super  Sensitive 

Analyzer 


WESTON  Model  773 

Tube  Checker 
(available  in  counter 
and  portable  types) 


WESTON 

Radio  Instruments 


...  and  24  other  awards  in 
WESTON'S  "50th  Anniversary"  Contest! 

Get  your  entry  blank  today!  Write  100  to  250  words  telling  "How 
Modern  Test  Equipment  Helped  Me  Solve  A  Difficult  Servicing 
Problem."  Send  in  your  entry  before  September  1st,  and,  if  your 
answer  is  judged  the  most  practical  and  most  interesting,  the  com- 
pletely equipped  service  bench  shown  above  will  be  shipped  to 
you  FREE!  And  there  are  24  other  awards  ...  all  Weston  test 
equipment .  . .  being  offered  in  this  contest  by  Weston  in  celebrat- 
ing its  50th  Anniversary  of  instrument  leadership. 

The  contest  is  open  to  all  individuals  actively  engaged  in  radio 
servicing,  except  Weston  employees  or  representatives.  The  con- 
test rules,  the  complete  list  of  prizes,  and  complete  instructions 
are  included  on  the  entry  blank.  Be  sure  you  enter  today. 

Get  entry  blanks  from  your  jobber, 
or  return  the  coupon  today. 


Weston  Electrical  Instrument  Corporation 
597  Frelinghuysen  Avenue,  Newark,  N.  J. 
Send  entry  blank  for  Weston's  "50th  Anniversary"  Contest 

Name .- .... 

Address _ _ _ 

City - - State 


: 


August,  1938 


31 


LOCATING  CAUSES  OF  DISTORTION 

Seventh  installment  of  the  dynamic  testing   principles  originated  by  Radio  Today 


By  VINTON  K.  ULRICH, 
(Service  Editor,  Radio  Today) 

Continuing  last  month's  discussion 
of  how  to  test  for  harmonic  distortion, 
Radio  Today  now  illustrates  its  points 
with  oscillograms  photographed  in 
its  own  laboratory. 

In  telling  of  the  various  ways  in 
which  distortion  could  be  observed, 
much  stress  was  laid  on  the  aural 
method  whereby  the  human  ear  was 
used  to  tell  when  distortion  occurred. 
To  many  servicemen,  it  may  appear 
that  this  method  is  subject  to  unusual- 
ly high  errors.  However,  numerous 
tests  with  various  types  of  distortion 
show  that  the  human  ear  is  keen  to 
changes  in  timbre  (amount  of  har- 
monics or  overtones)  of  a  single  fun- 
damental tone.  It  is  this  sensitivity 
of  the  ear  that  tells  us  that  a  particu- 
lar note  is  sounded  by  a  violin  instead 
of  a  flute. 

Ear  sensitive  to  harmonics 

The  erroneous  disregard  of  the  ear's 
sensitivity  in  observing  harmonic  dis- 
tortion is  doubtlessly  due  to  the  fact 
that  the  ear  is  known  to  be  extremely 
insensitive  to  changes  in  volume.  To 
readily  note  a  change  in  volume,  the 
change  must  be  on  the  order  of  3  DB 
or  about  a  40  per  cent  voltage  increase. 

To  changes  in  the  timbre  of  the 
tone  (harmonics)  the  ear  is  far  more 
sensitive  as  shown  in  Fig.  1  on  oppo- 
site page.  By  feeding  a  single  tone  (sine 
wave)  into  the  set,  a  pure  tone  should 
be  heard  in  the  speaker  if  there  is  no 
distortion.  Curve  Af  is  the  waveform 
of  the  output  of  the  set  at  a  fairly  low 


level  and  is  substantially  the  same  as 
that  of  the  audio  oscillator — frequency 
is  1,000  cycles.  Curve  B  is  for  a  slight- 
ly-increased power  output  and  shows 
very  little  distortion. 

Fig.  1-C  shows  a  fair  amount  of  dis- 
tortion which  is  readily  recognized  by 
ear.  In  fact  the  signs  of  distortion  are 
recognizable  about  half-way  between 
waveform  B  and  C.  Curve  D  shows  a 
high  amount  of  distortion  and  curve  E 
shows  extreme  distortion. 

The  amount  of  distortion  shown  by 
waveform  C  is  tolerable  and  would 
probably  be  considered  as  the  maxi- 
mum distortion  permissible  for  an 
"undistorted"  power  output  rating. 

Peak  and  average  vs.  RMS 
voltages 

In  addition  to  using  the  oscilloscope 
or  the  ear,  many  servicemen  have  a 
third  way  of  checking  for  distortion  at 
their  disposal.  This  method  requires 
the  use  of  a  rectifier-type  meter  and  a 
vacuum-tube  voltmeter  connected 
across  the  voice  coil  of  the  set. 

Rectifier-type  meters  operate  on  the 
average  or  rectified  current  and  are 
calibrated  in  terms  of  root  mean 
square  (R.M.S.)  voltages.  As  long  as 
the  voltage  is  sinusoidal  (no  harmon- 
ics) they  read  accurately.  On  the 
other  hand  some  vacuum-tube  volt- 
meters operate  on  the  principle  of 
peak  readings.  Like  the  rectifier-type 
meter,  they  are  calibrated  in  terms  of 
RMS  volts  and  are  accurate  so  long  as 
used  on  sinusoidal  waves.  Other  tube 
meters  operate  on  R.M.S.  voltages* 
and  are  accurate  regardless  of  the 
waveform. 


By  operating  the  two  meters  in  par- 
allel across  the  voice  coil,  they  will 
both  read  the  same  (within  the  maxi- 
mum errors  of  the  meters)  so  long  as 
the  waveform  is  sinusoidal.  As  har- 
monic distortion  sets  in,  the  readings 
of  the  two  meters  will  diverge — one 
will  read  higher  than  the  other.  If 
the  readings  of  the  meters  are  plotted 
against  each  other,  as  long  as  there  is 
no  distortion,  a  straight-line  plot  will 
result.  As  distortion  sets  in,  the  meter 
readings  will  diverge,  causing  the  plot 
to  become  curved  or  deviate  from  a 
straight  line.  Figs.  2  and  3  show  this 
phenomenon. 

Aural  and  visual  harmonic 
analysis 

If  the  two  meters  have  errors;  for 
instance,  one  reads  3  per  cent  high 
and  the  other  3  per  cent  low,  the  plot 
will  still  be  a  straight  line  when  there 
is  no  distortion  present — however,  the 
line  will  not  have  a  45°  slope,  as  it 
does  when  the  meters  read  exactly 
equal. 

Fig.  2  shows  how  the  voice  coil  volt- 
age varies  with  the  two  types  of 
meters  when  distortion  sets  in.  The 
letters  A,  B,  C,  D,  E  refer  to  the  cor- 
responding waveforms  in  Fig.  1.  Also 
the  output  level  at  which  distortion  is 
apparent  to  the  ear  is  marked  on  the 
plot.  Note  that  in  this  plot  the  volt- 
age indicated  by  the  rectifier  type  me- 
ter when  distortion  is  present  is  high- 
er than  that  shown  on  the  tube  volt- 
meter. 

To  show  that  this  comparison  of 
rectifier  and  tube  voltmeter  readings 
will  work  on  more  than  one  type  of 


Fig.  2  (left)  and  Fig.  3  show  how  the  readings  of  a  rectifier  type  meter  and  a  vacuum  tube  voltmeter  will  diverge  when 
distortion  occurs.     Letters  refer  to  corresponding  curves  in  Fig.  1. 


32 


Radio  Today 


A  to  E  and  F  to  H  are  two  series  of  oscillograms  taken  to  illustrate  sensitivity  of  the  ear  in  recognizing  distortion. 
The  ear  will  easily  recognize  distortion  when  it  reaches  the  percentage  shown  in  curves  C  and  F. 


waveform,  the  data  for  Fig.  3  was 
taken.  In  direct  contrast  to  Fig.  2,  at 
very  high  output  levels  with  high  dis- 
tortion, the  rectifier  type  meter  reads 
less  than  the  tube  meter.  This  is  quite 
explainable  however,  since  the  wave- 
form is  very  peaked.  The  letters  F,  G, 
H,  refer  to  the  waveforms  in  Fig.  1. 

Frequencies  for  distortion  tests 

While  1,000  cycles  was  used  in  the 
tests  described,  the  same  results  will 
be  obtained  on  frequencies  as  low  as 
one  hundred.  Generally  speaking  the 
use  of  such  a  low  frequency  is  inad- 
visable because  of  possible  overloading 
of  the  speaker  and  other  sources  of  dis- 
tortion that  are  not  factors  at  higher 
frequencies.  Frequencies  above  1,000 
cycles  are  not  satisfactory,  since  the 
harmonics  may  be  out  of  the  range  of 
the  set.  A  number  of  tests  at  400 
cycles  shows  this  frequency  to  be  en- 
tirely satisfactory. 

The  next  topic  deals  with  how  to 
find  those  factors  which  limit  the  fre- 
quency response  of  a  stage.  As  was 
pointed  out  in  the  June  issue  on 
pages  40  and  42,  the  plate-grid  coup- 
ling condenser  in  a  resistance-coupled 


stage  is  an  important  factor  in  deter- 
mining the  base  response. 

The  audio  oscillator  should  be  con- 
nected to  the  plate  side  of  the  coup- 
ling condenser  and  the  frequency  of 
the  oscillator  varied  while  noting  the 
voltage  output  of  the  set.  If  a  cop- 
per oxide  meter  is  used,  it  should  be 
connected  across  the  voice  coil  with- 
out using  the  DC  blocking  condenser.* 

Checking  grid  coupling 
condenser 

In  order  to  prevent  disrupting  the 
DC  voltage  distribution  in  the  set,  a  2 
to  4  mike  DC  blocking  condenser 
should  be  used  in  series  with  the  out- 
put of  the  oscillator  as  explained  in 
the  July  issue  on  page  42.  The  con- 
denser should  be  this  large  in  order 
to  overcome  loading  effects  of  the  cir- 
cuit such  as  the  plate  impedance  of 
the  preceding  tube. 

Fig.  4  shows  the  types  of  response 
that  will  be  obtained  in  a  high-fidelity 
set  with  various  values  of  coupling 
condensers.  The  solid  line  represents 
the  response  with  normal  value  of 
coupling  condenser.  When  the  coup- 
ling condenser  is  reduced  to  1/10  its 


normal  value  or  .001  mfd.  the  bass 
response  falls  as  shown  by  the  dotted 
curve.  A  curve  for  a  .00025  mfd. 
coupling  condenser   is  also  shown. 

If  the  bass  response  is  too  low  the 
oscillator  should  be  connected  to  the 
grid  side  of  the  coupling  condenser. 
If  the  bass  response  then  becomes  the 
same  as  for  a  proper  value  of  coupling 
condenser,  the  loss  in  bass  response  is 
traceable  to  the  coupling  condenser. 
If  the  coupling  condenser  were  .00025 
mfd.  and  the  oscillator  tuned  to  100 
cycles,  by  moving  the  oscillator  con- 
nection from  the  plate  side  to  the  grid 
side  of  the  coupling  condenser,  the  re- 
sponse would  change  from  that  of 
point  "A"  on  Fig.  4  to  point  "B." 

Note  that  at  higher  frequencies  the 
effect  becomes  less.  Because  this  ef- 
fect is  greatest  at  low  frequencies,  the 
test  should  preferably  be  made  at  the 
lowest  frequency  that  the  set  should 
pass  without  appreciable  loss  in  vol- 
ume. 

In  order  to  show  the  effect  of  the 
varying  impedance  of  the  speaker 
voice  coil,  the  heavy  dotted  curve  was 
taken   after   a   resistive  load   had    re- 

(To  page  36) 


Fig.  4  shows  the   effect  of  the  coupling  condenser  in  a  re- 
sistance coupled  stage.     Note  (heavy  dotted  curve)  how  the 
substitution    of   a   resistor    load    for    the    speaker    voice    coil 
flattens  out  the  response  of  the  audio  amplifier. 


Fig.  5  illustrates  how  the  gain  of  the  set  is  reduced  when  no 
cathode  by-pass  condenser  is  used  (heavy  dotted  curve).  The 
light  curve  shows  the  effect  of  insufficient  by-pass  condenser. 
Note   that   gain   of   the   amplifier   is   reduced    on   lows   only. 


August,  1938 


33 


ELECTRIC  REFRIGERATION  MARKETIPS 

Which    includes    news   of   associated   appliance   lines 


NEARLY  50  PER  CENT  OF  BOXES 
ARE  4  YRS.  OLD  OR  OLDER 

In  the  now-famous  home  inventory 
conducted  among  53,124  housewives 
in  16  key  cities,  the  Scripps-Howard 
statisticians  found  that  47.2  per  cent 
of  those  owning  refrigerators  bought 
them  in  1934  or  earlier.  Exactly  59.7 
per  cent  of  the  homes  reporting  have 
a  "box-'  of  some  kind. 

Sales  by  years  of  all  brands  of  re- 
frigerators, in  per  cent  of  mentions, 
run  like  this : 

1937    16.6 

1936    19.2 

1935    17.0 

1934    11.9 

1933     8.9 

1932    7.0 

1931 4.8 

1930     6.1 

1929   or  earlier 8.5 

BUYING  POWER  STUDY 

"The  average  retail  price  of  all 
household  washers  sold  in  the  first  five 
months  of  this  year  is  $74.49,  com- 
pared to  $71.95  in  the  same  period  of 
1937,"  reports  J.  R.  Bohnen  of  the 
American  Washer  and  Ironer  Mfgrs. 


Association.  This  is  taken  to  mean 
that  consumer  buying  is  steady,  and 
responsive  to  quality  appeal. 

As  for  units,  washers  shipped  last 
May  totalled  84,016,  compared  to 
160,246  in  May  last  year.  Ironers 
shipped  during  that  month  added  up 
to  6,675,  compared  to  12,062  in  May 
1937. 

Sales  of  vacuum  cleaners  for  May 
were  94,666,  while  the  total  for  that 
month  last  year  was  168,609,  accord- 
ing to  C.  G.  Frantz  of  the  Vacuum 
Cleaner  Mfgrs.  Association. 

FARM  APPLIANCE  SALES 
GET  A  BOOST 

That  farmers  are  now  excellent 
prospects  for  appliances,  but  are  often 
unable  to  pay  on  a  regular  monthly 
time-payment  basis,  is  the  reason  for 
new  financing  plans  announced  by 
General  Electric  Contracts  Corp. 
Farmers  can  pay  when  they  harvest 
a  crop,  under  a  new  arrangement 
which  applies  to  refrigerators,  ranges, 
water  heaters,  dishwashers,  kitchen 
waste  units,  home  laundry,  etc. 

A  two-payment  plan  provides  for  a 


This  refrigerator  introduces  itself,   then  lets  its  features   speak  for  themselves! 

The  voice  comes  from  a  recorded  sales  presentation,  played  on  the  phonograph, 

heard  through  the  radio  at  the  top  of  the  "Musical  Shelvador." 


25  per  cent  down  payment,  with  the 
balance  payable  in  equal  amounts  at 
the  end  of  six  and  eight  months. 

A  four-payment  plan  requires  a  15 
per  cent  down  payment,  with  one- 
quarter  of  the  balance  due  at  the  end 
of  three,  six,  nine,  and  twelve  months. 

The  third  plan  requires  a  20  per 
cent  down  payment,  with  the  balance 
payable  in  eight  installments  at  the 
end  of  3,  6,  9,  12,  15,  18,  21  and  24 
months. 

Also  current  in  farm  sections  is  a 
big  drive  by  Briggs  &  Stratton,  co- 
operating with  GE,  to  sell  gasoline- 
powered  washers.  State  and  county 
fairs,  corn  husking  bees,  tractor 
shows  and  similar  farm  events  are  the 
center  of  this  drive,  and  elaborate 
promotional  material  is  being  pre- 
pared for  dealers  and  distributors  to 
use  at  all  such  farm  gatherings. 

REFRIGERATOR 
BUSINESS-GETTER 

A  simple  and  dramatic  device  to 
show  refrigerator  prospects  that  mod- 
ern boxes  are  fast-freezing  is  being 
suggested  by  Westinghouse.  The  idea 
is  that  salesmen  actually  make  up  a 
batch  of  Jello,  for  the  customer,  in 
four  minutes  chilling  time. 

You  make  the  recipe  in  your  spare 
time,  so  as  not  to  do  the  mixing  in 
the  customer's  presence.  Tou  simply 
dissolve  Jello  in  boiling  water,  add 
ice  cubes  in  water  and  let  melt,  and 
store  the  mixture  in  the  Water 
Server. 

For  the  prospect  you  begin  the 
demonstration  by  pouring  one  cup  of 
the  mixture  into  the  Multi-Service 
tray.  In  four  minutes  you  have 
tangible  proof  that  the  box  works 
swiftly. 

To  conduct  this  stunt,  and  also  an 
ice  cream-making  one,  the  firm  has 
introduced  a  handy  demonstration 
kit. 

GLIDE  SHAVER  PROMOTION 

For  the  new  Glide  Shaver,  the  $7.50 
electric  razor  made  by  International 
Appliance  Co.,  a  division  of  the  Inter- 
national Radio  Corp.,  makers  of  Ka- 
dette  radio,  the  firm  has  made  an  in- 
troductory offer  to  dealers. 

This  offer  includes  a  display  unit,  a 
counter  card,  a  window  streamer  and 
two  newspaper  ad  mats,  along  with  the 
merchandise. 


34 


Radio  Today 


Voij'f  fo//ow  the  o/cf  curves! 


Your  Sales 
Curves  won't 
follow  old 
curves  if  you 
follow  Crosley! 


Crosley  Follows  NO  Precedent. 

Don't  play  "dead  dog"  just  because  the  refrigeration  business  does 
from  now  until  January  1st.  New  automobiles  stimulated  car  sales  in 
the  fall.  Crosley  applies  the  same  idea  to  Shelvadors,  presenting  brand 
new  startlingly  low  priced,  completely  re-engineered  refrigerators. 

Get  the  most  of  the  refrigeration  business  between  now  and  Christmas ! 

You  can  get  up  a  lot  of  momentum  between  now  and  January  1st  and 

meet  the  new  year  with  a  running  start. 

With  the  new  Crosley  line  of  Shelvadors 
and  energetic  sales  effort  this  fall  you  can 
leave  your  competition  way  behind ! 


AfEIV 
"REGULAR" 

SHELVADORS 
PRICED  TO 
MEET  /43$ 

CONDITIONS 


cu.  ft. 

R.F.D. 

SPECIAL 


i  — n 


^ffifin     ^rtfwfh 


6'/ieaft. 

ma 


THE    CROSLEY    RADIO    CORPORATION 


August,  1938 


Radio  is  not  standard  equipment  but  may  be  had  in  above  models  at  additional  cost. 

The  public  always  responds  when  prices  are  low  and  values  are  evident. 

If  you  are  not  stocking  and  showing  the  new  Crosley  1939  models  including  the 

RFD  Special  rush  to  the  nearest  Crosley  distributor  and  get  going  right  away. 

Prices  slightly  higher  in  South  and  West. 

ttO&b&f  SHELVADOR 

35 


DYNAMIC  TESTING 

(Continued  from  page  33) 

placed  the  speaker  load.  This  resistive 
load  was  in  the  form  of  a  25-watt  rheo- 
stat so  adjusted  that  the  voltage  across 
the  resistor  at  1,000  cycles  was  the 
same  as  when  the  voice  coil  was  in 
the  circuit.  This  means  that  the  re- 
sistance has  the  same  value  as  the 
impedance  of  the  voice  coil.  If  the 
actual  ohmic  impedance  of  the  voice 
coil  is  desired,  it  can  be  obtained  by 
measuring  the  DC  resistance  that  was 
cut  into  the  circuit. 

Note  that  with  a  resistive  load,  the 
response  of  the  set  is  much  flatter  than 
with  the  voice  coil.  While  this  response 
is  the  true  response  of  the  audio  cir- 
cuits, the  variation  caused  by  the 
change  in  voice  coil  impedance  with 
frequency  is  not  serious.  For  practi- 
cally all  radio  work,  the  tests  can  be 
performed  with  the  voice  coil  load. 

Though  much  reference  has  been 
made  to  the  copper-oxide  rectifier  type 
meter  for  measuring  voice  coil  volt- 
ages, the  tube  voltmeter  or  cathode-ray 
oscilloscope  are  equally  as  good.  Since 
small  variations  (less  than  25%)  are 
not  noticeable  in  the  response  of  the 
set,  the  serviceman  does  not  have  to 
take  extremely  accurate  readings.  Just 
by  watching  the  height  of  the  pattern 
on  the  screen  of  a  'scope,  the  service- 
man can  quickly  tell  when  the  re- 
sponse drops  off  too  much  for  proper 
reception. 

If  the  bass  response  of  the  amplifier 
is  not  improved,  even  after  connecting 


the  audio  oscillator  to  the  grid  side 
of  the  coupling  condenser,  this  fact 
indicates  the  coupling  condenser  is 
okay.  Consequently,  it  is  desirable  to 
test  the  next  place  where  bass  fre- 
quencies can  be  lost. 

Cathode  by-pass  condenser 

The  cathode  by-pass  condenser  is 
used  to  prevent  degeneration  due  to 
the  common  coupling  of  the  cathode 
bias  resistor.  If  the  value  of  this  con- 
denser is  not  great  enough,  degenera- 
tion or  inverse  feedback  will  take  place. 
Naturally  this  degeneration  will  be 
greatest  at  low  frequencies  since  the 
impedance  of  the  condenser  is  least  at 
low  frequencies.  Fig.  5  shows  the  ef- 
fect of  varying  the  value  of  the  by-pass 
condenser  across  the  cathode  resistor. 

The  normal  response  with  a  12-mike 
by-pass  condenser  across  a  3,000  ohm 
cathode  resistor  is  shown  by  the  solid 
line  in  Fig.  5.  The  medium-heavy  dot- 
ted curve  shows  the  response  when 
only  .2  mfd.  is  used  across  the  cathode 
resistor.  The  effect  of  degeneration  at 
all  frequencies  (no  by-pass  condenser) 
is  shown  in  the  heavy  dotted  curve. 
Note  that  it  is  about  the  same  shape 
as  the  curve  for  the  12-mike  by-pass 
condenser  except  that  the  output  volt- 
age or  gain  of  the  amplifier  is  reduced 
to   about   40   per   cent. 

The  fact  that  the  variation  in  re- 
sponse is  about  the  same  for  both  the 
12-mike  condenser  and  no  condenser 
at  all  shows  that  the  12-mike  con- 
denser is  100  per  cent  effective  for  all 
frequencies  in  by-passing  the  cathode 
resistor. 


In  order  to  quickly  make  the  test 
for  proper  by-pass  action,  the  signal 
generator  should  be  set  at  the  lowest 
frequency  the  set  should  reproduce 
while  connected  to  the  grid  of  the 
stage  under  test.  Then  a  condenser  of 
about  the  proper  value  should  be 
clipped  across  the  cathode  resistor  to 
ground.  If  the  signal  output  increases 
appreciably,  it  is  an  indication  that 
the  by-pass  condenser  is  too  small  or 
defective.  If  the  increase  is  not  great 
enough,  try  a  larger  condenser.  At  100 
cycles  the  change  in  meter  readings 
correspond  to  points  "A"  and  "B"  on 
the  curves  in  Fig.  5. 

Low  gain  at  all  frequencies 

If  tests  showed  that  an  excessive 
amount  of  signal  was  required  to  get 
full  output  from  the  stage,  and  that 
the  frequency  response  was  satisfac- 
tory, the  procedure  would  be  similar 
to  the  last  instance  given.  A  condenser 
should  be  clipped  across  the  cathode 
bias  resistance,  and  if  the  signal  level 
increased  over  the  entire  audio  fre- 
quency band,  it  would  mean  that  the 
cathode  by-pass  condenser  was  open. 
The  condition  is  illustrated  in  Fig.  5 
by  the  change  from  the  heavy  dotted 
curve  to  the  solid  curve. 

Since  the  output  is  dependent  upon 
the  input  voltage,  the  serviceman 
should  check  the  response  of  the  os- 
cillator over  the  entire  band  and  the 
response  of  the  oscillator  and  amplifier 
combination,  if  used.  If  it  is  20  per 
cent  down  at  50  cycles,  that  means 
that  a  receiver  with  a  flat  frequency 
characteristic  will  appear  to  be  down 


ZENITH  MODELS    7S204,  7S232,    7S240,    7S242 
7S258,  7S260,    7S26I      CHASSIS   NO.  5709 


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2 — A  shielded  transmission  line  which  reduces  noise 
and  makes  possible  a  convenient  ground  connection 
for  the  antenna  coupler. 

3 — A  shield  on  the  transmission  line  which  functions 
as  a  lightning  arrester  because  it  grounds  any  accu- 
mulated electrostatic  charges. 

4 — A  system  that  transfers  greater  radio  power  from 
the  antenna  to  the  receiver  because  of  the  iron  core 
couplers  and  the  clear  channel  transmission  line. 

5 — An  antenna  that  is  very  easy  to  erect  and  once 
erected,  it  retains  a  neat  appearance  longer  with 
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6 — Elimination  of  man-made  electrical  interferences. 

BELDEN  QUALITY— has  been  built  into  this 
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Your 


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ounc 


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The  Radio  Wiring  Line 


August,  1938 


37 


\I>JU STABLE  KlfWyF' 

. . .  made  poa title  liij 

THE  ACOUSTIC 
COMPENSATOR 


#Higheror 
lower  pitch 
with  the 
same  micro-  • 
phone. 


With  the  flip  of  a  finger  you  can  now  (J)  lower 
or  raise  the  response  of  the  microphone.  , .  (2) 
adjust  the  microphone  ior  most  desirable  re- 
sponse for  close  talking  or  distant  pickup.  .  . 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment. 

MODELS  RBHk.  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  11000  cps,  output, 
■65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable.  _ $42.00  LIST 


NEW  LOW-PRICED  CONTACT  "MIKE" 


$12.00  LIST 


The  new  popular-priced  Amperite  Contact  Mi- 
crophone can  be  used  on  most  radio  sets  made 
since  1935  and  on  all  P.A.  systems.  It  "makes 
an  ordinary  violin  sound  like  a  Strad"  . . .  gives 
a  small  piano  the  tone  of  a  Grand.  And  yet, 
there  is  no  distortion.  No  unnafurai  effects.  No 
"fingering  noises."  No  changes  in  strings  or 
instrument.  Attached  without  tools. 
Operates  with  either  high  or  low  gain  ampli- 
fiers. Has  frequency  response  of  40  to  9000  cps. 
Output,  -40  db.  20'  of  cable. 
MODEL  SKH  (Hi-imp);  SKL  (200  ohms), 

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NEW  COMPACT  "MIKE' 


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well  as  for  stand  mounting.  Complete 
with  output  transformer,  cable  con- 
nector and  switch.  Output,  -70  db. 
into  open  line.  Frequency  response 
60  to  7500  cycles. 
MODEL  ACH  (Hi-imp.);  ACL 
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P.A.  Men,  you  can  improve  those 
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You  will  get  better  results  be- 
cause (1)  it  is  excellent  for  both 
speech  and  music;  (2)  has  flat  re- 
sponse without  undesirable 
peaks;  (3)  reduces  feedback;  (4) 
stands  up  under  rough  handling 
and  changes  in  temperature, 
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MODEL  RAH  (Hi-imp);  with 
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MICROPHONE 


SERVICE  NOTES 


20  per  cent  at  50  cycles.  That  the  os- 
cillator voltage  is  not  constant  is  un- 
important so  long  as  the  serviceman 
takes  it  into  account.  For  the  sake  of 
convenience,  the  voltage  output  of  the 
audio  oscillator  used  in  these  tests  has 
been  plotted  on  a  chart  which  hangs  on 
the  wall  of  Radio  Today's  laboratory. 


TOscillograms  in  this  article  were  photo- 
graphed directly  from  the  screen  of  a  Clough- 
Brengle   model    127   oscilloscope. 

*The  Weston  type  669  vacuum  tube  volt- 
meter used  in  Radio  Today's  Lab,  operates 
on   R.M.S.   voltages. 

#A  Hickok  4,800  S  multimeter  was  used  for 
these  tests. 


USE  PROPER  FUSES 


Fuses  are  provided  in  radios  simply 
to  protect  the  power  transformer  and 
thereby  avoid  an  expensive  replace- 
ment in  case  something  goes  wrong 
in  the  tubes  or  circuits,  states  Strom- 
berg-Carlson's  service  division. 

If  the  proper  fuse  is  replaced  by  one 
of  higher  current  rating,  or  by  a  piece 
of  wire,  etc.,  this  protection  is  nulli- 
fied, and  the  transformer  exposed  to 
possible  burn-out  at  that  time  or  in  the 
future.  Such  practice  is  dangerous, 
and  it  certainly  is  not  fair  to  request 
free  transformer  replacement  ■ —  even 
within  the  guarantee  period — where  an 
improper  fuse  has  been  used. 

We  are  all  aware  that  shorted  recti- 
fiers can  blow  fuses,  or  can  burn-out 
an  unprotected  transformer.  It  is 
news  to  some,  however,  that  new  high- 
power  audio  output  tubes  can  do  the 
same,  or  that  any  short  in  the  filter 
system  to  these  low-impedance  tubes 
can  overload  an  improperly  fused 
transformer. 

The  only  safe  plan  is  to  keep  a  stock 
of  fuses  on  hand,  and  check  thoroughly 


for   shorts  whenever  an  open   fuse   is 
encountered. 

COUPLING  CONDENSERS  IN 
RESISTANCE-COUPLED  AMPLIFIERS 

An  interesting  bit  of  information 
not  generally  known  to  servicemen  re- 
garding coupling  condensers  in  audio 
amplifiers  has  been  included  in  Na- 
tional Union's  Radio  Tube  Manual  and 
is  quoted  herewith: 

"It  might  be  mentioned  that  a  mis- 
take commonly  made  in  resistance- 
coupled  amplifiers  is  the  use  of  an  un- 
necessarily large  coupling  condenser. 
If  the  possibility  of  motor  boating  is 
to  be  minimized,  the  coupling  con- 
denser should  be  no  larger  than  is  ab- 
solutely necessary  to  obtain  satisfac- 
tory transmission  at  the  lowest  useful 
frequency.  For  instance,  in  certain 
receivers  where,  due  to  limitations  im- 
posed by  the  speaker  and  the  effective 
baffle  size,  the  lowest  useful  frequency 
for  the  amplifier  to  transmit  might 
well  be  as  high  as  100  or  150  cycles. 
In  such  an  instance,  assuming  a  grid 
leak  of  0.5  megohms,  the  coupling  con- 
denser should  not  be  more  than  0.003 
microfarad. 

"Incidentally,  another  benefit  accru- 
ing from  the  use  of  a  coupling  con- 
denser no  larger  than  is  absolutely 
necessary  is  that  the  effective  power 
output  is  increased.  This, is  true  because 
transmission  of  frequencies  to  the  grid 
of  the  power  output  tube,  lower  than 
that  which  may  be  acoustically  repro- 
duced, simply  uses  up  an  appreciable 
part  of  the  tube's  power  capability. 
Using  a  coupling  condenser  as  large  as 
0.1  microfarad  invites  trouble." 


'  ' ,:, 


Handy  wall  outlet  installed  at  the  window  eliminates  messy  and  trouble- 
some antenna  and  ground  lead-in  wires.     This  unit  offered  by  Cornish 
Wire  is  easily  installed  by  the  serviceman.  • 


38 


Radio  Today 


MototOW. TIME-TUNING 

THE  RADIO  THAT  TUNES  ITSELF! 


TUNES  FAVORITE  PROGRAMS  BY  ITSELF...  ALL  DAY 

"SET"  STATIONS  ALL  AT  ONE  TIME... 
THEY'LL  TUNE  IN  ONE  AFTER  ANOTHER 

WITHOUT  ANY  FURTHER  ATTENTION 

• 

COMBINED  WITH 

"QecUUeA.-<lcH*cU"  ELECTRIC  TUNING 

This  year's  biggest  demonstrating  feature.  Nothing  you  ever  saw  compares  with 
Time-Tuning  in  radio  convenience  and  luxury.  Automatically  tunes  favorite  pro- 
grams all  through  the  day  and  night.  Changes  stations  on  the  hour,  half-hour  or 
quarter  hour  ...  or  the  same  station  can  be  left  on  for  several  hours  if  desired.  Turns 
itself  ON  and  OFF.  Simple  and  easy  to  "set"  as  a  clock.  It's  electric  —  nothing 
to  get  out  of  order. 


7^e  HOtltSt 

HOT  LINE  FOR  1939 

Setting  the  pace  for  the  industry  with  something  really 
new  that  your  customers  can  afford  to  buy.  Motorola 
gives  you  demonstrable  worthwhile  features  that  appeal 
to  women  buyers  ...  a  quick  "turn-over"  line  of  hot 
values  .  .  .  newest  cabinet  styling  .  .  .  and  discounts 
that  allow  you  a  decent  profit. 

"ALL-IN-ONE"  REMOTE  CONTROL 

Perfection  in  Remote  Con- 
trol. Tunes  six  favorite 
stations,  turns  set  ON  and 
OFF,  and  raises  and  lowers 
volume  either  at  the  radio 
set  or  remote  control  with- 
out turning  any  knobs 
or  switches. 


GALVIN  MFG.  CORPORATION  •  CHICAGO 


<& 


ftc  Answer  tact, 


DEFINITE   DEMAND 

WIRE   WOUND 

RADIOHMS 

"Build  us  a  wire  wound  resistor 
that's  as  good  as  your  other  prod- 
ucts" •  .  .  they  asked  us  time  and 
again.  And  so  we  "gave  in"  with 
the  result  that  where  circuit  re- 
quirements call  for  "Wire  Wound,'' 
servicemen  have  been  using  the  new 
CENTRALAB  Wire  Wound  Radi- 
ohm  with  remarkable  success. 
Available  at  your  jobber  ...  in 
dimensions  identical  with  the  Stand- 
ard Radiohm.  Be  sure  to  specify 
Centralab. 

Features: 

Small  size.  Bnkelite  case  is  1%" 
in  diameter  x  9/16"  deep.  Avail- 
able in  values  from  2  to  10,000 
ohms. 

Insulated  construction — no  wash- 
ers  required   in   mounting'. 
Regiilar  Kndiohm  switch   covers 
can   be   attached. 
Dissipates    up    to   4   watts    with- 
out  damage  or   change. 
Universal   shaft   for   all   replace- 
ment  work. 
Close   Tolerance 1-    5%. 

Chief  applie  fit  ions  : 

1.    Instruments 

'2.  In  radio  receivers  where  very 
heavy  bleeder  current  passes 
through  unit  in  cathode  and 
screen   circuits. 

3.  Filament  control. 

4.  Hum    control. 

In   linear  curve   only 

Centralab 

Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 


SERVICING 


STEWART-WARNER 
PUSH-BUTTON  TUNING 

In  some  of  the  new  Stewart-Warner 
sets  push-button  switches  are  used  for 
wave-changing  as  well  as  automatic 
tuning. 

For  the  purpose  of  simplifying  the 
schematic  the  switches  have  been 
drawn  separately — although  in  the  set 
they  are  grouped  together  and  have  a 
common   latch-bar   mechanism. 

The  top  switch  is  the  "foreign"  or 
short-wave.  When  the  manual  broad- 
cast switch  or  any  one  of  the  station 
switches  is  pressed,  the  short-wave 
switch  unlatches  and  returns  to  the 
broadcast  position. 

The  manual-automatic  switch  con- 
nects either  the  tuning  condenser 
gang  or  the  trimmers  across  the  broad- 
cast band  coils. 

Three  different  capacity  trimmers 
are  provided:  high,  medium,  and  low. 
These  are  plainly  labeled  in  the  set- 
ting-up instructions.  Never  use  a  high- 
capacity  trimmer  to  set-up  a  high- 
frequency  station  or  vice-versa.  If 
trimmer  is  set-up  either  too  tightly 
or  too  loosely,  it  will  not  retain  its 
calibration. 

TIE  UP  WITH  AN 
AUTO-PARKING  LOT 

An  energetic  Chicago  serviceman  has 
an  arrangement  with  several  automo- 
bile parking  lots  in  his  vicinity, 
through  which  he  gets  any  radio  ser- 
vicing which  originates  in  these  lots. 
Signs  are  posted  at  the  entrance  to 
each  parking-space  "Dependable  Radio 
Servicing  While  Your  Car  Is  Parked — 
Ask  Attendant." 

A  parking  customer  who  has  been 
having  trouble   with   his   auto-radio — 


on  leaving  his  car — merely  has  to  ex- 
plain the  difficulty  to  the  man  in 
charge  of  the  lot,  who  immediately 
calls  up  the  serviceman.  Quickly  a  re- 
pairman is  sent  to  go  over  the  set,  and 
usually  the  repairs  are  all  made  and 
the  radio  is  again  in  good  operating 
condition  before  the  owner  comes  back 
to  get  his  car.  The  radio  man  makes 
out  his  bill  and  leaves  it  with  the  park- 
ing attendant,  to  be  collected  before 
the  car  leaves  the  premises. 

Having  found  the  repair  service 
prompt  and  convenient,  several  cus- 
tomers have  brought  small  sets  and 
even  consoles  in  their  cars  to  be  fixed 
by  the  invisible  service  man.  A  small 
commission  to  the  parking-lot  owner 
pays  for  the  cooperation  of  the  at- 
tendant and  himself  in  this  plan  to 
speed  up  radio-service  sales. 

USE  CAUTION  WHEN  USING 
UNIVERSAL  TUBE-TYPE  RESISTORS 

*  A  word  of  caution  to  servicemen 
when  using  universal  tube-type  resis- 
tor replacements  is  sounded  by  the 
Clarostat  engineering  department,  as 
follows: 

In  order  to  save  the  added  cost  of 
terminal  strips,  some  manufacturers  of 
AC-DC  sets  have  been  using  the  extra 
socket  connections  of  the  resistor  tube 
for  tie-in  posts.  These  tie-ins,  in  most 
instances,  carry  plus  B  voltage.  This 
practice  has  resulted  in  much  grief 
by  way  of  quick  burnouts  of  tube-type 
resistors,  and  even  serious  damage  to 
the  set  itself. 

Therefore,  the  socket  connections 
should  be  checked  before  inserting  a 
universal  type  resistor  tube.  If  only 
three  prongs  are  needed,  cut  off  the 
extra  prongs  so  as  to  avoid  any  danger 
of  having  one  of  these  extra  prongs 
make  contact  with  any  high-voltage 
source  that  might  burn  out  the  tube. 

Specifically:  Take  the  10-23-A,  for 
instance.  It  comes  with  connections 
at  prongs  Nos.  7,  8,  2  and  3.     Should 


Push-button  tuning  circuit  used  in  the  current  Stewart- Warner  receivers.   Wave- 
change   and   manual-automatic   switch   are   part   of   the   push-button   assembly. 


40 


Radio  Today 


there  be  any  connection  at  the  socket 
for  any  other  voltage  but  the  line  volt- 
age, be  sure  to  cut  off  the  extra  prongs. 
For  example,  we  are  going  to  replace  a 
K-55-B  with  a  23-55-A  Universal  tube. 
On  the  K-55-B  we  have  prongs  Nos.  7, 
8  and  3  for  the  necessary  drop,  while 
the  23-55-A  has  a  connection  at  No.  2 
prong  also.  Therefore,  cut  this  No.  2 
prong  off  to  be  safe,  for  under  the 
chassis  the  set  manufacturer  may  be 
using  socket  connection  No.  2  for  tying 
in  some  source  of  high  voltage. 

Reference  to  the  necessary  data,  as 
given  in  the  new  Clarostat  tube-type 
resistor  wall  chart,  will  help  deter- 
mine connections  within  any  particu- 
lar type  cf  resistor  tube. 


RCA  ELECTRIC  MOTOR  TUNING 

This  year's  type  of  motor  tuning 
used  in  the  RCA-Victor  sets  is  of  the 
homing  type,  where  the  motor  auto- 
matically turns  in  the  proper  direc- 
tion so  as  to  go  directly  to  the  station. 

This  is  accomplished  through  the 
use  of  a  split-stator  type  selector  disc. 


One  motor  field  winding  is  connected 
to  each  side  of  the  selector  disc.  The 
direction  of  the  motor  rotation  is  de- 
termined by  the  position  of  the  push- 
button contact  on  the  selector  disc — 
and  this  rotation  is  always  such  that 
the  motor  turns  in  the  proper  direc- 
tion so  as  to  go  directly  to  the  desired 
station. 

Double-throw  type  station  switches 
are  used,  so  that  if  more  than  one  is 
depressed  at  once,  the  mechanism  will 
select  a  station  and  then  come  to  a 
stop.  The  station  selected  if  more 
than  one  is  depressed,  is  the  one  with 
the  highest  number  on  the  diagram. 
The  manual-automatic  switch  grounds 
the  mechanism  on  the  manual  posi- 
tion and  operates  the  pilot  indicator 
light. 

Muting  of  the  set  during  tuning  is 
accomplished  by  taking  an  AC  voltage 
from  across  the  motor  field  and  rec- 
tifying it  so  as  to  provide  a  cut-off 
bias  in  the  audio  stage. 


MAJESTIC  RADIO  &  TELEVISION  CORP. 


2600  W.  50th  STREET,  CHICAGO,  ILL. 

EXPORT  SALES  OFFICE:  330  S.  WELLS  ST.,  CHICAGO,  ILL.,  U.  S.  A. 
CABLE:  "MAJESTICO— Chicaso" 


August,  1938 


41 


Daffiest  Gubernatorial  Campaign 
In  Texas  Draws  To  Hilarious  End 


o?i*sl 


^Mm^ 


'^States  Cad  ggfi* 


sniEiunus: 

occupy  point 

OF /UTfTNT/ON 


1  w»wJ^5j» 


wart 


,„  '/'"ami,,  - 


Prominent^11 
State  l^X^PrTrnary  Vot* 
West  Vv&SSj^^Cou 


fegistrars       In       TowtiRhipc 

Aufrtifl  12;  In  BorooRbs 

Augart  19 


POLITICS 

Bs!    tocomeI 

Dozens  of  political  campaigns  must  now  be  wired  for  sound.  Primaries  in  28  states 
started  the  August-to-November  uproar — a  brand-new  season  for  "public  address." 

THE  SOUND  STAGE 


This  produces  immediate  action.  By 
the  old  system,  she  could  just  simply 
signal  us.  Then  .we  would  leave  the 
customer  we  were  talking  to  in  the 
factory,  come  into  the  office,  and 
often  would  find  that  it  was  only  a 
salesman  waiting  to  see  us,  which 
matter  could  have  waited  until  we 
were  finished  with  our  customer.  This, 
of  course,  delayed  the  customer, 
which  is  not  good  policy. 

"We  believe  that  if  the  system  will 
operate  as  efficiently  as  it  has  since 
the  installation,  we  would  not  hesi- 
tate to  recommend  it. 

"Another  good  feature  about  this 
radio  call  is,  when  any  visiting  cus- 
tomers are  in  the  plant,  and  a  long- 
distance call  or  some  other  message 
is  delivered,  we  can  make  immediate 
contact  for  them,  which  gives  them 
a  very  good  impression  on  up-to-date 
factory  system." 


PA  SPEEDS  PLANT  PAGING 

*  The  American  Coach  &  Body 
Company,  Cleveland,  Ohio,  recently 
installed  a  public  address  system  for 
paging  throughout  its  large  factory. 
The  satisfactory  experience  which  the 
company  has  had  with  its  new  system 
is  testified  to  in  a  letter  written  by 
President  James  Holan  to  R.  J. 
Jaques,  Moock  Electric  Supply  Co., 
2905   Chester   Ave.,    Cleveland,    Ohio. 

"The  obsolete  call  system  which  was 
in  operation,  using  code  signals  for 
our  key  men  in  the  factory,  was  not 
responded  to  most  of  the  time,  owing 
to  the  confusion  of  so  many  numbers 
assigned  to  each  man.  The  greatest 
difficulty  was  when  we  had  three 
or  four  calls  coming  through  the 
switchboard.  We  could  only  call  one 
man  at  a  time  and  the  rest  of  the 
people,  demanding  quick  information, 
were  held   on  the  wire. 


"Consequently,  some  of  our  cus- 
tomers on  long  distance  got  tired  of 
waiting  and  hung  up,  then  we  had 
to  call  them,  at  our  expense,  apologiz- 
ing for  the  slow  service  we  were  giv- 
ing them.  With  this  new  system,  we 
are  able  to  call  as  many  people  as  are 
needed  at  one  time. 

Reach  execs 

"We  are  also  saving  time  and 
money  in  reaching  our  executives 
when  they  are  in  the  factory  with 
customers,  inspecting  their  equip- 
ment ready  for  delivery  and  we  do 
not  have  to  call  our  men  into  the 
office  for  every  petty  reason.  If  it  is 
very  important  we  can  just  tell  them 
what  they  are  needed  for.  For  exam- 
ple: when  the  girl  at  the  switchboard 
gets  a  long  distance  call  from  a  cus- 
tomer, she  just  simply  says,  'Calling 
Mr.     Holan;     long-distance     calling.' 


Ready  for  the  candidates — PA  specialist  E.  J.  Ryan  of  Cuyahoga  Falls, 

Ohio,  can  mount  or  detach  this  equipment  in  5  minutes.     Speakers  will 

each  extend  125  ft.  apart;  the  microphone  will  run  out  175  ft. 


"SOUND"  MAY  BRING 
BACK  VAUDEVILLE 

*  B.  A.  Rolfe  and  Jack  Horn  are 
promoting  a  plan  to  use  public-address 
systems  and  orchestra  recordings  in 
vaudeville  houses  in  an  effort  to  bring 
back  the  vaudeville  circuits  of  years 
ago,  without  the  expense  of  orchestras 
for  each  house. 

The  plan  involves  making  special 
musical  accompaniments  for  each  act 
on  the  circuit,  the  records  to  be  car- 
ried by  the  performers  as  they  move 
from  one  theatre  to  another,  with 
standard  sound  and  pick-up  equip- 
ment in  each  vaudeville  house.  This 
would  make  vaudeville  theatres  eco- 
nomical to  operate,  doing  away  with 
the  costly  house  musicians. 

SELLING  SATISFACTION 

Sound  specialists  should  not  become 
over  eager  to  close  a  sale  on  a  price 
basis.  The  salesman  must  always  bear 
in  mind  the  requisites  of  his  prospect 
and  suggest  the  equipment  best  suited 
for  that  particular  purpose,  even  if 
such  equipment  may  not  be  the  most 
profitable  sale. 

The  baby  sound  industry  has  now 
reached  proportions  where  the  sound 
salesman  can  approach  his  prospect 
knowing  that  his  ideas  are  necessary 
in  solving  the  prospect's  sound  prob- 
lem and  that  his  calls  need  not  be 
made  with  apologies. 

With  the  prospect  of  a  great  sound 
year  and  the  cooperation  given  by  the 
various  manufacturers,  the  aggressive 
sound  specialist  will  utilize  every 
means  at  his  command  to  take  ad- 
vantage of  the  profits  that  can  be  de- 
rived from  this  fast-growing  industry. 


42 


Radio  Today 


PA  PICKUPS 


Walter  C.  Hunter  of  Hunter  Radio 
Shop,  Enid  Okla.,  reports  the  comple- 
tion of  one  of  the  largest  and  most 
profitable  PA  jobs  of  the  season  for  his 
area — the  installation  of  a  62-speaker 
system  in  the  two  local  junior  high 
school  buildings. 

Presto  Recording  Corp.,  New  York 
City,  arranged  to  make  personal 
phonograph  records  free  for  all  guests 
at  the  Chicago  convention  of  the  Na- 
tional Association  of  Music  Merchants, 
Hotel  Stevens,  Aug.  1  -  4.  The  firm 
had  ten  portable  sound  recorders  in 
action  in  rooms  549-50. 


Radio  Engineering  Laboratories,  35- 
52  Thirty-Sixth  St.,  Long  Island  City, 
N.  Y.,  pioneer  manufacturers  of  two- 
way  police  radio  equipment,  last  month 
signed  an  agreement  with  American 
Telephone  &  Telegraph  Co.  permitting 
REL  to  continue  with  the  development 
and  manufacture  of  two-way  communi- 
cation equipment. 


Miss  Helen  Staniland  of  Quam- 
Nichols  reports  that  the  new  complete 
line  of  Quam  speakers  with  "replace- 
ment transformers,  an  exclusive  Quam 
feature,  is  being  received  with  tre- 
mendous enthusiasm  by  jobbers  every- 
where in  the  country,  an  enthusiasm 
that  is  being  evidenced  by  an  increas- 
ing jobber  business.  A  number  of  new 
jobbers  are  handling  the  Quam 
speaker  line,  and  reporting  a  real  de- 
mand for  Quam  speakers  and  lots  of 
enthusiasm  among  new  customers  for 
the  replacement  transformer  idea. 


Oxford^Tartak  Radio  Corp.,  Chicago, 
in  recognition  of  increased  demand  for 
its  products  abroad,  has  named  John 
C.  Hill  as  export  manager,  according 
to  news  from  J.  S.  Gartner,  secretary 
of  the  company. 


R.  J.  Coar,  veteran,  Washington, 
D.  C,  radio  engineer  consultant  and 
now  with  Radioscriptions,  Inc.,  in  that 
city,  has  been  appointed  a  distributor 
for  the  recording  division  of  the  Uni- 
versal Microphone  Co.,  Inglewood, 
Calif.,  and  has  established  a  display 
room  with  a  complete  Universal  dis- 
play including  the  master  wax,  pro- 
fessional, portable,  school  and  college 
and  aluminum  models.  He  will  act  as 
distributor  to  radio  stations  and 
schools  and  colleges.  L.  C.  Shumac 
continues  as  Washington,  D.  C,  factory 
representative  for  both  the  recording 
and  microphone  divisions  of  the  Cali- 
fornia factory. 

Walter  Spiegel,  sales  manager  of 
Regal  Amplifier  Mfg.  Corp.,  is  making 
an  extensive  tour  of  eastern  and  west- 
ern areas,  plugging  the  company's 
complete  line  of  "Tokfone"  inter- 
communicating equipment.  Latest  addi- 
tion to  the  line  is  a  10-watt  combina- 
tion paging  and  inter-communicating 
system,  comprising  master  station, 
sub-station  and  power  supply  unit. 


(jLr..,e|en*en 


vers 


A  COMPLETE  PERFORMANCE  RANGE 
A  COMPLETE  PRICE  RANGE 

but 

REGARDLESS  OF  PRICE  OR  MODEL 

All  are    built   to    the 

Uncompromising  JENSEN 

Standard  of   Quality 

•  Jensen  policy  is  not  to  make  one 
twelve-inch  PM  speaker  and  claim  that 
it  is  best  for  all  applications.  We  know 
that  different  applications  require  differ- 
ent models  and  that  is  why  five  models 
of  Jensen  Permanent  Magnet  Speakers 
are  offered  the  trade.  Choice  lies  be- 
tween considerations  of  price,  sensitivity, 
power  handling  capacity  and  response 
characteristics ;  but  no  matter  which 
model  is  chosen  there  is  no  price  pre- 
mium for  Jensen  uncompromising  quality. 


JENSEN    RADIO    MFG.    COMPANY  RT-S3S 

6601   S.   Laramie  Ave.,  Chieago,  111. 

Please   send   me   more   information   on 

□  New   Jensen   12-inch   PM   Speakers. 

□  Peri-dynamic    Reproducers    with    Bass    Reflex. 


Name 
Address 
City    .  . 


5  Models 

A  Better 
12"  JENSEN  P.  M. 

Speaker  for 
EVERY   PURPOSE 


1  Model  A-12PM-ln  either  High 
1  Fidelity  or  Standard  Fidelity  de- 
sign. The  most  sensitive  of  ail  Jen- 
sen 12"  PM  Speakers  and  the 
greatest  power  handling  capacity. 
List  Price 
(Less  Transformer) $34.75 

J  Model  PM-12B— A  new  improved 
*■  model  of  the  previous  PMI2-B. 
More  sensitive  and  very  close  to 
A-12PM  in  all  around  ability;  in 
either  High  or  Standard  Fidelity 
design.  List  Price  (Less  Trans- 
former)   $25.00 

O  Model  PM12-H— A  new  model  in 
"  either  High  or  Standard  Fidelity 
design.  Handles  output  of  ten 
watt  amplifier  and  is  highly  sensi- 
tive. List  Price  (Less  Transform- 
er)  $19.50 

A  Model  PM12-C— A  popular  priced, 
■  widely  used  12°  PM  speaker. 
Probably  more  value  for  the  mon- 
ey than  any  other  known  12" 
speaker.  List  Price  (Less  Trans- 
former)  $13.25 

K  Model  PM12-GS— A  new  Speaker 
"  throughout  to  meet  the  demand 
for  a  good  quality  low  priced  12" 
PM  Speaker.  Handles  output  of  8 
watt  amplifier  capably.  List  Price 
(Less  Transformer) $9.85 

BR-12 


0 


Use  Jensen  Peri-dynamic  Reproducers 
with  BASS  REFLEX  with  all  Jensen 
PM  Speakers  where  the  utmost  in 
quality  of  performance  and  conven- 
ience  in   installation    is   required. 


August,  1938 


43 


RECORDS 

of  the  month 


BUDDY  CLARK  singing  I  Married  an  Angel  and 
Spring  Is  Here,  both  from  the  musical  of  the  same 
name — Vocation   4191. 

RICHARD  HIMBER  and  his  Essex  House  orchestra 
playing  My  Margarita  with  VR  by  Stuart  Allen  and 
See  Sharp — Victor  25890. 

DICK  ROBERTSON  and  his  orchestra  playing  When 
Mother  Nature  Sings  Her  Lullaby,  with  VC  by  Dick 
Robertson,  and  Hi-Yo  Silver,  with  VC  by  Robertson 
and  Men  About  Town — Decca  1914. 


HENRY  KING  and  his  orchestra  playing  Say  It 
With  Music  from  the  20th  Century  Fox  film  "Alexan- 
der's Ragtime  Band,"  with  VC  by  Sonny  Schuyler  and 
■Swonderful— Decca  1890. 

KAY  KYSER  and  his  orchestra  playing  Hi-Yo  Silver 
with  VC  by  ensemble,  and  My  Best  Wishes  with  VC 
by  Harry  Babbit — Brunswick  8165. 

WILL  HUDSON  and  his  orchestra  playing  The  Flat 
Foot  Floogee  with  vocal  by  ensemble  and  There's 
Something  About  an  Old  Love  with  VC  by  Jayne  Dover 
— Brunswick  8164. 

ART  KASSEL  and  his  Kassels  in  the  Air  playing 
Silver  on  the  Sage  from  the  Paramount  film  "The 
Texans,"  and  I'll  Still  Be  Loving  You,  both  with  VR 
by  Billy  Leach— Bluebird  B7696. 

JAN  GARBER  and  his  orchestra  playing  The  Same 
Sweet  You  with  VC  by  Lew  Palmer,  and  When  Twilight 
Comes  with  VC  by  Russ  Brown — Brunswick  8176. 


THE  KING'S  JESTERS  and  their  orchestra  singing 
Pedro  the  Cocktail  Shaker  and  Phil  the  Fluter's  Ball 
— Decca  1902. 

MAXINE  (Vocadence)  SULLIVAN  singing  St.  Louis 
Blues  and  L'Amour  Toujours.  L'Amour,  with  Claude 
Thornhill  and  his  orchestra — Victor  25895. 

ANDREWS  SISTERS  singing  I  Married  an  Angel  and 
Land  of  the  Sky  Blue  Water — Decca  1912. 

RAY  NOBLE  and  his  orchestra  playing  My  Walking 
Stick  and  Now  It  Can  Be  Told,  both  from  "Alexan- 
der's Ragtime  Band,"  both  featuring  Tony  Martin — ■ 
Brunswick  8153. 

KAY  KYSER  and  his  orchestra  playing  Music  Maes- 
tro Please  with  VC  by  Jinny  Simms  and  So  You  Left 
Me  for  the  Leader  of  the  Swing  Band  with  VC  by 
Sully  Mason— Brunswick  8149. 


SALES  FEATURES  AND  SPECIFICATIONS  OF  THE  1938-39  SETS  CONTINUED  FROM  JULY  ISSUE— Compiled  by  Radio  Today 


Cabinet 

Wave- 
bands 

Number 
tubes 

(RMA 
defin.) 

Plug-  Cond. 
in     gang     Spkr. 
re-       sec-    size  & 
sistor%  tions  type 

Watts 
audio 
power 

(Max.) 

Power 
Supply 
and 

watts 

Selec- 
tivity 

Tone 
con- 
trol 

Vis- 
ual 
tun- 
ing 

Automatic  Tuning 

AVC 

Model             List 
No.               price 

Tyoe 

Drift 
Comp. 

Stations 

Adjust- 
No.   ments 

Re- 
mote 
con- 
trol 

Style 

Material 

Peak 

Zenith  Radio  Corp 

6S362               59.95 

75363  69.95 

75364  79.95 
7S366              99.95 
9S365              89.95 

, — Continued  from 
CON        Wood 
CON        Wood 
CON        Wood 
CON        Wood 
CON        Wood 

page  22, 
B.P.S 
B.Si.S 
B,Si,S 
B.Si.S 
B,P,S 

6-0 
7-0 
7-0 
7-0 

9-0 

None           2     10-EE 
None            2     10-EE 
None            2     12-EE 
None           2     12-EE 
None           3     12-EE 

4H 
4H 
4H 

AC 
AC 
AC 
AC 
AC 

Fixed 
Fixed 
Fixed 
Fixed 
Fixed 

None 

Yes 

Yes 

Yes 

Yes 

None 

CR 

CR 

CR 

CR 

It 
It 
It 
It 
It 

CC 

cc 

CC 
CC 
CC 

6     1-F 
6     1-F 
6     1-F 
6     1-F 
6     1-F 

No 
No 
No 
No 
No 

Yes 
Tes 
Yes 
Yes 
Yes 

455 

455 
455 
455 
455 

9S367 

99.95 

CON 

Wood 

B.Si.S 

9-0 

None 

3 

12-EE 

4^ 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

9S369 

129.95 

CON 

Wood 

B.Si.S 

9-0 

None 

3 

12-EE 

4J4 

AC 

Fixed 

Yes 

CR 

It 

CC 

K 

1-F 

No 

Yes 

455 

12S370 

149.95 

CON 

Wood 

B.Si.S 

12-0 

None 

3 

12-EE 

15 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

12S371 

179.95 

CON 

Wood 

B.Si.S 

12-0 

None 

3 

12-EE 

15 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

15S372 

199.95 

CON 

Wood 

B.Si.S 

15-0 

None 

3 

12-EE 

30 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

15S373 

235.00 

CON 

Wood 

B.Si.S 

15-0 

None 

3 

12-EE 

30 

AC 

Fixed 

Yes      CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

6D302 

29.95 

PC-T 

Wood 

B 

5-0 

1 

2 

5-EE 

1.6 

AC-DC 

Fixed 

None   None 

None 

Yes 

455 

5R303 

44.95 

PC-T 

Wood 

B 

5-0 

None 

2 

5-EE 

3H 

AC 

Fixed 

None   None 

It 

CC 

4 

1-F 

No 

Yes 

4bb 

6S304 

79.95 

PC-T 

Wood 

B,Si,S 

6-0 

None 

2 

8-EE 

4M 

AC 

Fixed 

None   None 

It 

CC 

5 

1-F 

No 

Yes 

455 

6S301 

99.95 

PC-CS 

Wood 

B.Si.S 

6-0 

None 

2 

8-EE 

4M 

AC 

Fixed 

None   None 

It 

CC 

5 

1-F 

No 

Yes 

455 

6S305 

99.95 

PC-C 

Wood 

B.Si.S 

6-0 

None 

2 

12-EE 

4M 

AC 

Fixed 

None 

None 

It 

CC 

5 

1-F 

No 

Yes 

455 

6S306 

149.95 

PC-C 

Wood 

B.Si.S 

6-0 

None 

2 

12-EE 

4H 

AC 

Fixed 

None 

None 

It 

CC 

h 

1-F 

No 

Yes 

455 

9S307 

199.95 

PC-C 

Wood 

B,Si,S 

9-0 

None 

3 

12-EE 

Wi 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

15S308 

350.00 

PC-C 

Wood 

B,Si,S 

15-0 

None 

3 

12-EE 

30 

AC 

Fixed 

Yes 

CR 

It 

CC 

8 

1-F 

No 

Yes 

455 

FARM  AND  BATTERY  SET  SALES  FEATURES  AND  SPECIFICATIONS 


Cabinet                           Number    Bal- 

Output           Spkr. 

Watts  Class          & 
s  (max)  amp.     type 

Tone 
con- 
trol 

Fil. 
volts 

Battery    Drain 

Stor. 

batt.     "A"     "B"         "B" 
amps  amps,  volts       mils 

Auto  Tuning 
Ilium- 
Type    No  of  inated 

stations  dial     AVC 

Model                List         Style         Ma-         Wave     (RMA       resis-      gang 
No.                   price                         terial       bands     defin.)        tor      section 

IF 

Peak 

Belmont  Radio  Corp.,  1257  Fullerton  St.,  Chicago,  111. — "Belmont." 

408                    NS         FT           /Plastic!   B             4-M         None             2 
501                    NS         FT           \Wood  J  B             5-0          None             2 
524                     NS         FT           Wood         B,S           5-0           None              2 
611                    NS         FT           Wood        B,S          6-OM      None             2 

NS 

NS 
NS 
NS 

NS  5-PM 
NS  5-PM 
NS  6-PM 
NS  6-PM 

None 
None 
None 
Var 

6 
2 
2 
6 

NS 
NS" 

NS* 

NS 

NS' 
NS 

NS' 

NS 

Mech 
Mech 
Mech 
Mech 

5 
5 
6 
6 

Yes 
Yes 
Yes 
Yes 

Yes 
Yes 
Yes 
Yes 

NS 
NS 
NS 
NS 

Continental  Radio  &  Television  Corp.,  3800  Cortland  St.,  Chicago,  111  — 

"Admiral." 

512-6D          %  34.95    T             Wood        B,S          6-0          None             2 
965-6A              52.95    T             Wood        B,S          6-0          None             2 
950-6A              74.95    CON       Wood        B.S          6-0          None             2 

1M 

A      6-PM 
A      6-PM 
A      8-PM 

Step 
Var 
Var 

6 
6&  AC 
6&  AC 

2.8 
2,2 
2.2 

None 
None 
None 

Yes 
Yes 
Yes 

Yes 
Yes 
Yes 

456 
456 
456 

Crosley  Radio  Corp.,  1329  Arlington  St.,  Cincinnati,  Ohio — "Crosley." 

B458A           $  14.99     FT           Plastic       B              4-0           None              2 
B548A                19.99     FT           Plastic       B              5               None              2 
B5548A             24.95     VT           Wood         B              5               None              2 
B587A               29.95     VT           Wood         B              5               None              2 
B667A               54.95     VT           Wood         B.P.S       6               None              2 

NS 

NS 
NS 
NS 
NS 

NS       5-PM 
NS       5-PM 
NS       5-PM 
NS       NS 

NS       NS 

None 
None 
None 
None 
Yes 

1.4      .... 

2 

2          

6&AC   NS 
6  &  AC  NS 

NS 
.42 
NS 

NS 
90 

NS 

NS 
10 

NS 

Mech 
Mech 
Mech 
None 
None 

4 
5 
5 

No 

NS 
NS 
NS 
NS 

Yes 
Yes 
Yes 
Yes 
Yes 

NS 

NS 
NS 
NS 
NS 

B558M              39.95     CON        Wood         B              5               None              2 
B667M             74.95    CON       Wood        B,P,S      6              None             2 

NS 
NS 

NS       8-PM 
NS       10-EE 

None 
Yes 

2 

6&  AC 

NS" 

NS 

NS 

NS 

Mech 
None 

5 

NS 

NS 

Yes 
Yes 

NS 
NS 

Wells-Gardner  &  Co.,  2701  N.  Kildare  Ave.,  Chicago,  III.— "Wells-Gardner"  &  "Arcadia." 

106S2-714         NS         T             Wood        B.S          6-M         None             3 
106S2-768         NS         CON       Wood        B,S          6-M         None             3 

.8 
.8 

NS  8-PM 
NS  8-PM 

Var 
Var 

6 
6 

2.4 
2.4 

It 
It 

6 
6 

NS 
NS 

Yes 
Yes 

456 
456 

%  Line  voltage  dropping  resistors  of  plug-in  type,  commonly   referred   to 

as  b; 

llast   resistors  or 

tubes. 

NOTES 


NS — Data  not  supplied 

CABINET  STYLE 

CS — Chairside 

CON— Console    (Also  C) 

FT— Flat  table 

F — Furniture  design 

MT — Miniature  table 

PC — Phonograph   Combination 

PCA — Phonograph  combination  with  automatic 

record  changer 
PCM — Phonograph  combination — manual  change 

of  records 
PORT— Portable   (Also  P) 
T— Table 
VT— Vertical   table 


WAVEBANDS— 

B— Broadcast    (approx.    540-1700   KC) 
P— Police    (approx.    1700-5500   KC) 
Pt— Police    (approx.    1600-3500   KC) 
S— Shortwave    (approx.   5500-20,000  KC) 
Si — Medium    shortwave    (approx.    2500-7000) 
U — Ultra  shortwave    (about  25,000  KC) 
W— Weather  band   (approx.   150-350  KC) 

TUBES 

G— Glass    (old   style) 

0 — Octal  glass 

o — Octal  glass — midget  type 

M— Metal    . 

GM — Mainly   glass,   some   metal 

GO — Mainly   glass,   some   octal   glass 

MG — Mainly  metal,  some  glass 

M0 — Mainly  metal,  some  octal  glass 

0G — Mainly  octal  glass,  some  glass 

0M — Mainly   octal    glass,   some   metal 


SPEAKER   TYPE 

EE — Electrically    excited    dynamic 

Mag — Magnetic 

PM — Permanent   magnet   dynamic 

POWER  SUPPLY 

AC — Alternating    current 

AC-DC — Either   alternating   or   direct   current 

SELECTIVITY 

Fixed — Non-adjustable   selectivity 

Var — Selectivity  adjustable  from  panel  of  set 

TONE   CONTROL 

Step — Step  type  of  tone  control — 2  or  more 

points 
Var — Continuously   variable   tone   control 

VISUAL  TUNING 

CR — Cathode  ray  indicator  tube 


AUTOMATIC    TUNING 

Type 

Ct — Condenser  trimmer 

C&lt — Condenser  and  inductance  trimmet 

It — Inductance  trimmer 

Mech — Mechanical   type   of  unit 

Motor — Motor  operated  mechanism 

Drift  compensation 

A  Ft; — Automatic  frequency  control 
CC — Compensating    condenser 

No.  of  adjustments  per  station  and  location 
B — Bottom  adjusted 
F — Front  adjusted 
R — Rear  adjusted 

Remote   control 
Opt — Optional 


44 


Radio  Today 


100%  SALES  INCREASE 

YEAR 


— again  proving  that 
there  is  no  substitute 
for  EXPERIENCE.  In 
over  "20  years  of 
knowing  how"  Parris- 
Dunn  has  been  imi- 
tated but 
equaled. 


DEALER  MARGIN  GREATER 
AGAIN  THIS  YEAR 


WHY 
SALES    OF     NEW 
1939  MODELS  are 

already    showing 
100%  increase  .  .  . 

■k    *    * 

SPECIAL  AUGUST  OFFER 

NEW  32-VOLT  MODELS! 
To  be  announced  soon.  Def- 
initely proven  the  world's 
finest.  They  are  different. 
Write  today.  Be  first  to  get 
the  details. 


The    basic     "slip     the    wind" 

patented  principle  is  improved 

consistently. 

Parris-Dunn  6-volt  chargers  are  quality 

built — durable — give    perfect    customer 

satisfaction. 

Custom    built    for    and    approved    by 

leading   radio    manufacturers. 

Radio    trade    name    advertises    dealer 

and   radio. 

Parxis-Dunn  was  first  to  make  chargers 

a   profit   item. 


All  steel  construction  with  four  legged  tower — Lighter — Stronger! 
No  unnecessary  weights  on  light  Hy-Torque  balanced  propeller. 
Starts  in  low  winds.     Produces  more  watt  hours. 
New  discovery!     Vibrationless  back  of  center  pivoting  point.     No 
vibration!     No  broken  propellers! 

More  powerful,  air-cooled  third  brush  control  genera- 
tor.    Guaranteed  for  one  year. 

Double  action  shock  absorber  governor  spring,  gives 
smooth  power  control.     No  flutter! 
Full    floating   self-adjusting  all   metal    collector    ring. 
New  design.    Guaranteed  for  life  of  unit. 


never 


PARRIS-DUNN    CORPORATION 

2  0      YEARS      OF      SUCCESSFUL      MANUFACTURING      EXPERIENCE 

CLARINDA  •  IOWA  •  U.S.A. 


ausle? 


WCi 


one 


T 


HE  most  complete  line  of  phonograph 
combinations  available.  Ansley  Dyna- 
phones  are  supplied  in  a  variety  of  woods 
and  finishes— in  Modern  and  Period  styles. 
Cabinets   are  made  in  our  own  factory. 


A  Seven  Year  Record  of 
Real   Dealer  Protection 

ANSLEY  RADIO  CORPORATION 

240  WEST  23rd  STREET  NEW  YORK,  N.  Y: 


...is  only  one  reason  why 
YOU'LL  SELL  LOTS  OF 
THESE  RCA  MIKES! 


LOW 
PRICE 


RCA  JUNIOR  VELOCITY  MICROPHONE 


Recommend  this  mike  to  those  who  want  the  best  at 
low  cost.  It's  the  finest  popular  priced  microphone 
RCA  has  ever  created.  Provides  peak  performance, 
is  attractive,  and  offers  the  rugged  construction  and 
long  life  of  RCA  Velocity  Microphones.  Alnico  mag- 
nets are  used  to  provide  exceptionally  high  signal- 
to-noise  ratio.  Is  adaptable  to  most  input  circuits 
because  of  three  output  impedances.  And  it  costs 
only  $43.50  list,  less  stand. 


RCA  AERODYNAMIC  MICROPHONE    W  9 


Sea  your  nearest  RCA  Com- 
mercial Sound  Distributor 
for  the  new  RCA  Sound 
Catalog,  or  write  direct  to 


Here's  a  P.  A.  winner!  It  costs  only  S26.50  list,  less 
stand.  Is  so  small  it  can  be  easily  carried  in  the  palm 
of  your  hand.  Yet  has  quality  features  including  ex- 
cellent frequency  response,  fine  tone  and  high  sensi- 
tivity. Is  used  to  good  advantage  for  close  talking. 
Has  new  Alnico  permanent  metal  magnet.  Requires 
no  external  excitation  of  power. 

ANY  SOUND  SYSTEM  SOUNDS  BETTER  EQUIPPED  WITH  RCA  RADIO  TUBES 

ROA  presents  the  "Maffio  Key"   even/  Sunday. 
2    to    3    p.m.,    E.D.T..    on    NBC    Blue    Network 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
A  Service  of  the  Radio  Corporation  of  America 


August,  1938 


45 


NOW/ 


You  Too 
Can  afford  to| 
§         Own  a 

bile    Sound   £  (jit  em 


NEW 

WEBSTER- 
CHICAGO 
18  Watt 

Mobile  Sound 
System 

6v.  DC— 110  v.  AC 
Operation 


•  Amplifier  is  4-stage,  6 
tubes,  18  watts  output, 
with  Multi-Stage  De- 
generation Phase  In- 
version 


One  Microphone, 
Phonograph  and 
Tone  Control 


one 
one 


Model  M-61S 


•  Phonograph  Turntable 
Is  Built  in  as  Integral 
Part  of  Amplifier 


*  Economical 
quirementi 


COMPLETE  SYSTEM  $89.70      •*".'«•—* 

with  Amplifier  M-61 8,  Turntable  Motor  and 
Pickup  with  both  6  v.  DC  power  pack  and  110  v. 
AC  power  pack,  two  Model  381 2  speakers,  1 5' 
cables  and  plugs,  1  Model  1240H  velotron  mi- 
crophone with  25'  of  cable  and  plug,-  less  tubes, 
less  horns NET  PRICE  $89.70 


Power    Re- 


This  remarkable  new  addition  to  Webster-Chicago's 
line  makes  it  possible  for  dealers  who  have  long 
wanted  to  get  into  the  sound  business  to  own  a  sys- 
tem that  will  take  care  of  all  kinds  of  rental  require- 
ments. 

Handling  up  to  3,000  people  outdoors  and  double  this 
number  indoors,  it  will  handle  all  moderate  size 
gatherings.  Remember,  this  system  includes  phono- 
graph turntable  and  motor,  microphone,  power  packs 
and    speakers. 

Don't  delay.  .  .  .  See  Your  Jobber  or  Write  to 
Webster. Chicago    for    more    information. 


WEBSTER-CHICAGO 


WEBSTER-CHICAGO 

Section  AU-9,   5622   Bloomingdale  Ave.,   Chicago,   111. 

Please   send   me   more   information   on 

D  New    Mobile    System    M-61S 

n  Complete   Catalog 

Name     

Address     

City    State    


This  new  Webster-Chicago 
system,  Model  M-618,  com- 
bines all  the  advantages 
previously  associated  with 
the  larger  installations.  This 
unit  is  built  with  the  latest 
sound  features.  is  thor- 
oughly flexible,  can  be  used 
both  indoors  and  outdoors 
and  on  sound  trucks,  ideal 
for    rentals. 

All  component  parts  used 
are  selected  with  Webster- 
Chicago's  usual  care,  and 
this  unit  carries  Webster- 
Chicago's  standard  guar- 
antee. 


Manufactured  under  license 
arrangements  with  Electrical 
Research  Products,  Inc.,  sub- 
sidiary of  Western  Electric 
Co.,  Inc.,  and  American 
Telephone  and  Telegraph  Co. 


RSA  BUILDS  NATIONAL  SPEAKERS 
BUREAU  FOR  SERVICEMEN 

The  RSA  is  completing  plans  for 
the  first  National  Speakers  Bureau 
for  the  benefit  of  local  chapters  of 
the  Radio  Servicemen  of  America. 
Speakers  of  national  prominence  will 
be  scheduled  to  appear  at  regular 
chapter  meetings  as  rapidly  as  the 
schedule  can  be  arranged.  A  large 
number  of  prominent  manufacturers 
who  maintain  speakers  on  a  national 
speakers  circuit  have  expressed  their 
willingness  and  whole-hearted  coop- 
eration on  the  project. 

RSA  feels  that  it  is  doing  a  ser- 
vice to  the  entire  industry  by  pro- 
viding these  speakers  for  its  local 
chapters,  which  local  chapters  are 
thereby  helped  to  have  a  better  un- 
derstanding and  knowledge  of  their 
profession. 

Any  interested  manufacturer  is 
urged  to  write  the  national  office  for 
complete  details. 

Extension  course 

The  RSA  announces  an  extension 
course  for  the  professional  service- 
man. This  course  is  intended  to 
keep  up  to  date  the  practical,  pro- 
fessional serviceman;  it  is  not  for 
the  beginner  and  it  does  not  contain 
any  fundamentals  of  radio  theory. 
It  will  contain  practical  working  de- 
tails of  all  new  developments  in  the 
radio  service  field  as  soon  as  they 
are  available  on  the  market. 

RSA  feels  that  there  are  plenty  of 
good  courses  available  for  the  novice 
in  radio  servicing  from  well  recog- 
nized radio  schools,  and,  therefore, 
this  course  is  for  the  professional 
serviceman.  It  is  available  only  to 
RSA  members  at  a  nominal  charge 
per  year.  Complete  details  may  be 
had  upon  application  to  national 
headquarters.  The  course  is  planned 
to  begin  in  September,  1938. 

Chapter  news 

RSA  reports  that  the  following 
chapters  have  voted  to  affiliate  with 
the  RSA  in  the  last  three  weeks: 
Green  Bay,  Wis.;  Danville,  111.;  De- 
catur. 111.;  Pittsburgh,  Pa.;  Fargo, 
N.  Dak.;  and  Minneapolis,  Minn. 

Johnstown — The  Tri-County  Chap- 
ter, Johnstown,  Pa,  had  its  yearly 
election  of  officers  at  which  time  the 
following  men  were  elected:  Presi- 
dent, Ralph  Galasso;  Vice-President, 
D.  L.  Kaufman;  Treasurer,  George 
Martin;  Secretary,  Ken  Vaughn. 

Danville — Danville,  111.,  voted  to 
join  the  RSA  at  a  recent  meeting. 
On  July  15th,  plans  for  local  chap- 
ter activity  were  taken  up.  The  fol- 
lowing officers  were  elected:  Chair- 
man, Lyal  Cummings;  Vice-Chairman, 
Harry  Longer;  Sec'y-Treas.,  Calvin 
Stapp. 

Our  local  dues  have  been  so  priced 
as  to  include  a  year's  subscription  to 
any  national  trade  journal  of  the 
member's  choice. 

Oklahoma  City — The  Oklahoma 
City  Chapter  sponsored  a  meeting  on 
July  7th  to  which  all  distributors' 
service  managers  were  invited.  This 
was  an  attempt  to  get  all  distributors 


46 


Radio  Today 


together  on  such  matters  as  charg- 
ing dealers  for  labor  on  sets  •within 
warranty,  elimination  of  competitive 
service  by  distributors,  etc. 

New  officers  were  elected  on  July 
5th  as  follows:  Pres.,  Roy  Allen; 
V-Pres.,  W.  S.  Jones;  Sec'y-Treas., 
L.  G.  Dearing. 

Minneapolis — One  of  the  newer 
and  larger  additions  to  the  growing 
RSA  family  is  the  Radio  Dealers  As- 
sociation of  Minneapolis.  This  group, 
which  includes  such  outstanding 
members  of  the  radio  service  pro- 
fession as  William  Warmington  and 
Ralph  Viles,  has  voted  to  join  forces 
with  the  RSA  and  are  laying  plans 
to  take  a  very  active  part  in  the  as- 
sociation work  in  the  Northwest. 

Decatur — The  Decatur  Radio  Men's 
Association  voted  to  affiliate  on  July 
12th  with  the  RSA.  This  fine  group 
of  servicemen  has  been  very  active 
in  bettering  service  conditions  in 
and  around  Decatur  for  a  number  of 
years.  The  group  is  under  the  lead- 
ership of  Chairman,  Gene  M.  Pay- 
ton;  Sec'y,  Maurice  L.  Alexander; 
Treas.,  Raymond  Shaw. 

Mr.  Dewey  L.  Otta  was  instru- 
mental in  having  the  local  group 
affiliate  with  the  RSA.  The  local 
newspapers  have  extended  splendid 
cooperation  to  this  group  in  their 
efforts  to  publicize  its  work. 

Green  Bay — The  Green  Bay  Chap- 
ter was  organized  July  13th  at  the 
Radio  Doctors  in  Green  Bay.  Mr. 
A.  Nejedlo  was  instrumental  in  get- 
ting the  servicemen  together  and  in 
doing  all  of  the  preliminary  work 
necessary   for   the   meeting. 

The  following  officers  were  elected: 
Chairman,  George  Thelen;  Sec'y, 
Harold  Dole;   Treas.,  Fred  Olsen. 

The  next  meeting  of  the  chapter 
will  be  held  July  27th  at  716  Main 
St.,  Green  Bay,  Wis. 

NATIONAL  ANTENNA  CHECK-UP 
WEEK,  OCTOBER  15-22 

The  first  annual  Antenna  Check-up 
Week  will  be  sponsored  by  the  Belden 
Manufacturing  Company  during  the 
week  of  October  15  to  22. 

In  the  automobile  industry  there 
are  regular  seasonal  campaigns  to 
stimulate  car  owners  to  look  after 
their  cars.  For  instance,  the  "Prepare 
the  Car  for  Winter  Driving"  and 
"Change  to  Summer  Oil"  campaigns 
have  long  been  successful  in  stimulat- 
ing sales  activity  for  automotive  ser- 
vice stations  and  dealers.  They  are 
effective  because  they  promote  the  sale 
of  replacement  parts  and  service  at 
the  periods  of  greatest  interest  in  car 
maintenance. 

The  time  is  ripe  for  similar  periodic 
check-ups  in  the  radio  industry.  There- 
fore, the  Belden  company  is  inviting 
radio  dealers  and  servicemen,  from 
coast  to  coast,  to  participate  for  the 
purpose  of: 

(1)  Benefitting  the  radio  receiver 
owner  by  improving  reception. 

(2)  Increasing  sales  of  antennas 
and  parts. 

(3)  Selling  more  labor  in  essential 
servicing  operations. 

To  reach  the  millions  of  set  owners 
Belden  will  advertise  Check-up  Week 
in  the  Saturday  Evening  Post  and 
Collier's  Weekly  during  the  first  week 
in  October. 


To  50,000  radio  dealers  and  service- 
men Belden  will  send  a  large  envelope 
containing: 

(a)  An  attractive  window  banner 
featuring  Antenna  Check-Up  Week. 

(b)  Lapel  buttons  for  store  clerks 
and  servicemen,  to  be  worn  during 
National  Antenna  Check-Up  Week  to 
identify  the  service  organization  with 
the  nationally  advertised  campaign. 

(c)  A  helpful  booklet  explaining 
"How  to  Sell  Better  Antenna  Installa- 
tions." 

(d)  Reprints  of  the  Saturday  Post 
and  Collier  ads  to  be  displayed  in  the 
store  during  the  campaign. 

Radio  wholesalers  will  be  furnished 
with  stickers  featuring  National  An- 
tenna Check-Up  Week  which  they  can 
use  on  all  their  correspondence  as  a 
build-up  for  the  big  drive  during  Oc- 
tober. 


PRIZES  FOR  BETTER 
SERVICE  SHOPS 


To  radio  service  men  who  want  to 
modernize  their  shops  into  a  bright 
exhibit  of  neatness  and  efficiency,  Hy- 
grade  Sylvania  Corp.  now  offers  prizes 
worth  a  total  of  $100.  The  coast-to- 
coast  contest  follows  the  widespread 
trade  interest  in  Sylvania's  Model  Ser- 
vice Shop,  built  and  exhibited  at  Em- 
porium, Pa.,  headquarters,  and  very 
successfully  shown  in  replica  at  the 
Chicago  Parts  Show.  The  firm  an- 
nounces the  modernization  campaign 
as  part  of  its  continuous  effort  to  elev- 
ate the  service  man  to  a  more  profit- 
able position. 

The  prizes  await  the  three  service 
men  who  best  adapt  the  Sylvania 
Model  Shop  plans  to  their  require- 
ments. Decisions  will  be  made  from 
photos  submitted,  with  special  atten- 
tion to  appearance,  efficiency,  and  re- 
sourcefulness in  using  available  space. 
Model  Shop  drawings  and  specifica- 
tions, which  will  suggest  appropriate 
modernization  in  individual  cases,  are 
contained  in  a  Sylvania  booklet. 

Local  banks  will  furnish  data  on 
financing  via  the  Federal  Housing  Ad- 
ministration so  that  economical  im- 
provements may  be  made  promptly 
and  without  spot  cash.  Contest  closes 
Sept.  30. 

HALSON  FIGHTS 
PROFITLESS  SELLING 

In  announcing  a  quality  miniature, 
the  Dwarf,  as  the  leader  of  the  1939 
Halson  line,  Hal  P.  Shearer,  president, 
is  opposing  the  common  practice  of 
cutting  discounts  on  miniatures  and 
very  low  priced  models. 

Mr.  Shearer  takes  the  position  that 
extremely  low  prices  and  reduced  dis- 
counts have  been  responsible  for  much 
of  the  profitless  selling  in  radio.  He 
contends  that  a  really  attractive  set 
without  any  sign  of  cheapness  will 
command  a  price  sufficient  to  net  the 
jobber  and  dealer  a  satisfactory  profit. 

Because  of  this  policy,  the  Dwarf,  at 
•$15  list,  is  not  manufactured  for  direct 
competition  with  the  lowest  priced 
sets.  "My  idea,"  said  Mr.  Shearer,  "is 
to  get  away  from  the  loss-leader  prin- 
ciple entirely.  That  is  why  we  are 
producing  a  model  which  can  be  han- 
dled as  a  profit  leader.  I  feel  that  the 
trade  is  entitled  to  have  a  fine  little 
set  that  can  be  sold  with  confidence." 


Moaei  ouu  «c  700 


Moaei  buti 


SHORT    WAVE    CONVERTERS 
FOR   CAR   RADIOS 

Can  be  attached  to  any  car  radio.  Has  on  and  off 
switch.  Does  not  affect  the  reception  on  the  stand- 
ard broadcast  bands.  MODEL  600 — covers  49,  31, 
25,  20,  19  and  16  meter  bands.  Designed  for  re- 
ception of  American  and  Foreign  short  wave  broad- 
cast. Especially  adapted  to  use  in  tropical  countries 
and  the  more  remote  parts  of  the  world.  Distance 
range  5000  to  10000  miles.  A  very  attractive  unit. 

List   Price    $24.95 

MODEL  700 — Long  wave  converter  covers  135  to 
410  Kc.  Used  in  U.  S.  to  receive  government 
weather  reports,  ships  at  sea,  etc. ,  in  cars  and 
boats  of  the  water  front  districts.  Designed  also 
for  use   in   Europe  and  Asia. 

List  Price $24.95 

For    Use    of    Police    and    Other    Law 

Enforcement  Officers 
MODEL  100 — Police  converter  with  fixed  condenser. 
Covers  1500  to  2600  kilocycles.  List  Price  $1 1.95 
MODEL  800 — Super  Sensitive  police  converter  with 
fixed  condenser.  Covers  1500  to  2600  kc.  Two 
metal  tubes,  exceptional  distance  range. 

List   Price    $  1 5.95 

MODEL  200 — Police  converter  with  variable  con- 
denser and  illuminated  dial.  Covers  1500  to  5500 

kilocycles.   List  Price    $17.95 

MODEL  500 — Police  converter  with  two  metal 
tubes,  variable  condenser  and  illuminated  dial. 
Very   sensitive.     Exceptional   distance   range.     List 

Price     $21 .95 

ALL  WAVE  ANTENNAS— Model  A— Hinge  Mount 

telescopic,  60  in.  long.    List  Price $3.50 

JOBBERS  AND    DEALERS  WANTED 

ABC  RADIO   LABORATORIES 

3334    X.    New    Jersey    Street 
Indianapolis,  Indiana,   IT.   S.  A. 


CLAROSTAT 

presents . . . 


•  Provsbly  better  wire-wound  power  resistors.  Green 
finish  for  ready  identification.  Inorganic  cement 
coated.  No  blistering  or  cracking  even  at  red  heat. 
Units  for  extreme  humidity  applications.  10,  20, 
25,  40,  50,  SO,  100,  160,  200  watts.  1  to  150,000 
ohms.    Also   variable    power   resistors. 

•  Voltage-dropping  power  cords  for  AC-DC  sets.  En- 
closed resistance  winding  provides  proper  plate  volt- 
age for  rectifier  and  reduced  voltage  for  tube  fila- 
ments.   Eight  types  meet  all   needs. 

2k  clp   your  local  jobber  to  show  you  these 

new  servicing  aids.     Ask  for  latest 

CLAROSTAT  catalog.     Or  write  us  direct. 


C K A KO STAT 

,;.-^  MAX  I  >.%«  Tl  IIIMi  CO. 

*^**    *-  lfi«'or|»c*rm«-ll 

5"^0S'»  :■        -J,,-  >OPlh  sislli  Si. 


August,  1938 


47 


Use  the  Motor  that 
Sells  the  Set! 


PLYER    MOTORS    do 

a   lot   of   selling   for 
radio-phonograph   combinations,   just 
as  surely  as  the  finest  values  in  radio 
sets  and  cabinets  do  theirs. 

High  fidelity  Flyer  Motors  run  at 
constant  speed,  regardless  of  vary- 
ing record  drag.  Xoiseless,  self-lubri- 
cating, laminated  bakelite  gears. 
Long,  over-size  bearings.  Self-start- 
ing, with  governor  control.  Either 
set-screw  or  pointer-and-dial  speed 
adjustment.  America's  most  efficient 
basic  design.  Precision  built.  Eany 
to  install.     Low  in  cost. 

Order  samples  to  test. 

^General  Immjstmies  CO., 

3838  Taylor  St.,  Elyria,  Ohio 


SALES  AID 


RADIOS  IN  SCHOOL  COLORS 

"Varsity"  sets,  with  enamel  color 
combinations  baked  on  Bakelite  table 
models,  are  being  shown  by  Stewart- 
Warner,  to  attract  undergrads  and 
alumni  from  coast  to  coast.  To  suit 
all  the  schools,  striking  colors  are 
combined  on  cabinet  bodies,  control 
knobs,  push  buttons,  speaker  grills  and 
cloth  screens.  Although  the  new  sets 
must  be  custom-finished  for  each  area, 
the  company  has  arranged  for  prompt 
shipment. 


UNIPAK,  A  NEW  MERCHANDISER 

In  order  to  say  dramatically  that 
"Radiart  Vibrators  'come  through'  in 
the  toughest  test  of  vibrator  dependa- 
bility," the  Radiart  Corp.,  Cleveland. 
Ohio,  have  introduced  the  "Unipak" 
idea  as  a  handy  way  for  jobbers  to  en- 
courage vibrator  stocking  by  service- 
men. 

It  consists  of  six  units,  each  one 
having  a  colorful  display  wrapper 
which  encloses  without  concealing  six 
individual  vibrator  cartons.  Each  of 
these  wrappers  shows  that  police  de- 
partments of  various  cities  have  found 
the  vibrators  OK.  Unipaks  come  in  10 
different  company  combinations;  one 
for  Delco,  for  Philco,  Motorola,  etc. 


"TOKFOXE 


5? 


THE   MOST   COMPLETE   LINE   OF   INTER  -  COMMtMCATIXG   EQUIPMENT 

The  TOKFONE  JR.  comes  with  master  and  remote  station  and  50  ft.  of  wire 
ready  to  install.  This  is  a  low-priced  two-way  intercommunicating  system  de- 
signed for  use  among  executives,  professionals,  hospitals,  garages,  homes,  drug 
stores,  etc.  Also  available  for  three-wire  system  called  our  TOKFONE  JR.  S-W 
with  switching  arrangment  on  substation  to  cut  out  background  noises  at  slight 

additional    charge.      Price $10.75    NET 

-i —  Tokfone  Jr.   Master  Station  Tokfone  Jr.   Remote  Station  — > 

.Model  142EA  comes  equipped  with  an  earphone  for  private  conversation. 
It  is  a  complete  two-way  intercommunicating  system  from  2  to  11  sta- 
tions, with  a  selector  switch,  low-priced,  efficient,  economical  and  fast- 
est method  of  holding  direct  two-way  amplified  communication  between 
two  or  more  persons  or  departments.  Ideal  for  use  for  hotel  paging, 
hospitals,  department  stores,  factories,  offices,  etc.  Comes  complete 
with  master  remote  station   and   50   ft.   of  wire. 

Price $12.95  NET 

Also  available  with  switching  arrangement  to  cut  out  background  noises 
at  small  additional  charge. 


Tokfone 
Model   142EA 
Master  Station 


TOKFONE  MODEL  510  MASTER  STA- 
TION equipped  with  earphone,  selector 
switch:  volume  control,  50  ft.  of  wire, 
ready  to  install.  Gives  you  complete 
inter-communication  between  any  stations 
or  any  group  of  stations. 


Direct  conversation  can  be  had  with  this 
system  without  the  use  of  a  talk-listen 
switch.  Comes  with  earphone  and  ready  to 
use.  Per  station,  price. .  $12.00  NET 
-< —  Tokfone  Mode!  510 — Master  to 
Master  Station 


TOKFONE  MODEL  141  is  a  two  watt  Beam  Power  System;  comes 
complete  with  master,  50  ft.  of  wire  and  one  remote  station.  Ideal 
for  use  where  great  volume  is  desired  for  offices,  factories,  small  in- 
dustrial plants,  garages,   etc.     Up  to  10  stations  can  be  hooked  up 

with  this   system.      Price $17.50   NET 

-< —  Tokfone   Model  141  Tokfone   Model  141A  — > 

Master  Station  Remote  Station 


TOKFONE  Model  144  comes  complete  with  master 
station.  Hypower  Supply,  substation  and  100  ft.  of 
wire  and  is  a  10  watt  com- 
bined paging  and  inter-com- 
municating system  which 
uses  6"  P.M.  speakers 
throughout.  This  system  has 
a  master  snitch  for  paging 
all  outlying  stations  simul- 
taneously, selector  switch 
for    calling   single    outlying 


Above  illustration  shows  complete   Model  144  system 


can  call  the  master  station,  etc.  Also  comes 
available  with  switch  and  three  wire  system  to  shut 
out  background  noise.  Ex- 
tremely sensitive  and  power- 
ful, using  2 — 6B5  push 
pull  in  the  output. 
Master,  sub  station,  Hy- 
power Supply  and  100  ft. 
of  wire $32.95  NET 


stations.     Outlying    stations    comprising    master,   sub   station   and    Hypower  Supply 


Three   Wire    Model    144SW 
at  slight  additional  charge. 


LICENSED,   by   agreement   with   Electrical    Research  Products,   Inc.,   UNDER   PATENTS   OWNED   or 

CONTROLLED  I1Y  WESTERN  ELECTRIC  CO.   AND  AMERICAN  TELEPHONE  AND  TELEGRAPH   CO. 

Send   for  Catalog  Showing   Complete   Line 

REGAL   AMPLIFIER   MANUFACTURING   CORP. 

10   WEST   17th    STREET 


Cable  Address :"Ramcoamp" 


JVEVVYORK    CITY 


Convenient  handling,  lively  display, 
dramatization  of  quality  features,  price 
inducement  and  a  1-year  guarantee  are 
all  parts  of  this  novel  promotion. 


TIME  TO  RETUBE 


A  self-starting  electric  clock,  which 
attractively  mentions  radio  tubes  to 
the  public,  is  being  furnished  by  Gen- 
eral Electric,  for  the  dealer's  window. 
The  clock  is  a  standard  GE  model,  and 
has  all  its  gears  sealed  in  oil — no 
winding,  oiling  or  regulating.  Over- 
all diameter  is  about  15  in. 


BACKGROUND  FOR  BEAUTY 
OF  NEW  SETS 

Two  new  background  displays,  styled 
to  set  off  the  handsome  qualities  of 
new  radios,  are  available  from  Strom- 
berg-Carlson. 

The  first  is  a  folding  screen,  two 
sides  of  which  form  a  right  angle,  to 
fit  the  new  corner  console  just  intro- 
duced by  the  company.  Designed  for 
stores  which  lack  corners  in  which  to 
display  this  new  set  style,  the  screen 
also  has  two  other  sides  which  supply 
a  background  for  straight  consoles. 
Walls  are  green-toned;  copy  in  black, 
gold  and  white. 

Second  background  is  a  luxurious, 
silk-like  drape,  supported  from  the 
ceiling  and  styled  for  more  impressive 
group  displays.  Coloring  throughout 
the  piece  is  rich  and  dignified;  "Wilton 
rugs  and  pedestals  for  table  models 
are  included. 

CHARLIE  M'CARTHY  AND  7,800 
THEATERS  IN  RADIO  PROMOTION 

Radio  distributors,  dealers  and  local 
theaters  are  now  involved  in  a  huge 
promotion  of  Majestic's  "Charlie  Mc- 
Carthy" radio  set,  recently  introduced 
by  the  Chicago  firm.  Some  7,800 
theaters  throughout  the  U.  S.  will  be 
showing  the  famous  dummy's  new 
Universal  picture,  "Letter  of  Introduc- 
tion," and  will  give  millions  of 
Charlie's  admirers  a  chance  to  win  one 
of  the  radios,  through  newspaper  con- 
tests and  theater  lobby  displays. 

Majestic  points  out  that  every  fan 
will  compete  to  win  the  set,  only  a 
handful  will  be  successful,  and  every 
unsuccessful  contestant  will  be  a  good 
prospect  for  radio  dealers  to  sell.  The 
dealer's  part  in  the  big  stunt  is  to 
stock  the  sets,  get  the  4-ft,  5-color 
McCarthy  display,  and  work  with  local 
theaters  when  the  picture  comes  to 
town. 


48 


Radio  Today 


FEATURING  IRIS  CAMERAS 

With  an  actual  camera  shown  in 
position  for  use,  a  new  counter  and 
window  display  has  been  released  by 
Universal  Camera  Corp.,  32  W.  23rd 
St.,  New  York  City,  to  promote  their 
new  popular  priced  Iris  candid  cam- 
eras. 

A  cut-out  of  a  man's  head  is  set  back 
from  the  descriptive  copy.  The  camera 
is  positioned  at  eye  level,  as  for  using 
the  view  finder  and  shooting.  Dummy 
ones  are  supplied  if  dealers  prefer.  In 
tour  colors,  the  display  is  11  V&  x  19. 


NEW  BOOKLETS 


United  Transformer  Corp.,  72  Spring 
St.,  New  York  City,  has  two  new  bulle- 
tins. "Special  Series  Transformer 
Components,  Amplifier  Kits  and  Trans- 
mitter Kits"  is  the  title  of  one;  the 
other  is  a  Radio  Set  Replacement 
Transformer  Manual. 

"The  Modern  Line  of  Quality  Test 
Equipment"  is  the  title  of  a  new  book- 
let released  by  Precision  Apparatus 
Corp.,  821  East  New  York  Ave.,  Brook- 
lyn, N.  Y. 

Fall  and  Winter  Master  Catalog,  No. 
73,  an  188-page  book  with  extra  fea- 
tures, is  forthcoming  from  Wholesale 
Radio  Service  Co.,  100  Sixth  Ave., 
New  York  City.  All  radio  products 
are  covered,  along  with  camera  equip- 
ment and  PA.  Copies  are  also  avail- 
able from  the  firm's  branch  offices. 

Wall  chart  in  handy  form,  giving 
complete  and  detailed  lists  of  inter- 
changeable and  replacement  tube-type 
resistors,  is  now  available  from  Claro- 
stat  jobbers  or  direct  from  Clarostat 
Mfg.  Co.,  Inc.,  285-7  Sixth  St.,  Brook- 
lyn, N.  Y.  It  has  seven  pages,  eye- 
letted  together;  ordered  direct  from 
headquarters  it  costs  25c. 

Capacity  and  Resistance  Bridge 
Manual,  with  practical  instructions, 
theory  and  functioning  of  these  instru- 
ments, is  a  new  one  from  Aerovox 
Corp.,  70  Washington  St.,  Brooklyn, 
N.  Y.  The  manual  comes  as  detailed 
instructions  with  the  bridge,  or  sepa- 
rately at  50c  each  from  jobbers  or 
from  Aerovox. 


A  new  public  address  and  inter- 
communicator  catalog,  which  lists  all 
the  products  of  the  David  Bogen  Co., 
Inc.,  663  Broadway,  New  York  City, 
has  been  prepared  by  Bogen  sales 
manager  Haskel   A.   Blair. 


The  theory,  the  need,  the  develop- 
ment and  the  application  of  John  F. 
Rider's  new  Chanalyst  are  all  covered 
in  a  new  booklet  released  by  Service 
Instruments,  Inc.,  404  Fourth  Ave., 
New  York  City.  Copies  of  the  16-page 
publication,  with  illustrations,  are  ob- 
tained by  writing  there. 


A  book  with  180  pages,  the  new 
1939  radio  catalog  of  the  Allied  Radio 
Corp.,  833  W.  Jackson  Blvd.,  Chicago, 
is  now  ready.  It  features  new  trends 
in  receivers,  radio-phonographs,  service 
instruments,  amateur  equipment,  pub- 
lic address,  radio  parts,  etc. 

New  low  prices  and  latest  technical 
information  on  CD's  new  "Blue 
Beaver"  electrolytics  are  all  found  in 
Catalog  156A,  available  free  on  request 
from  Cornell-Dubilier  Electric  Corp., 
South  Plainfield.  N.  J. 


"Complete  Dynamic  Testing,  Step-by- 
Step,  with  Time-Saving  Cathode  Ray" 
is  covered  by  Kendall  Clough,  president 
and  chief  engineer  of  Clough-Brengle 
Co.,  in  a  new  condensed  booklet.  The 
complete  14-point  test  procedure,  from 
antenna  to  ground  is  presented  as  the 
new  trend  in  servicing;  practical,  sim- 
ple, quick  and  direct. 


Community  Antenna  Manual,  fea- 
turing the  new  TACO  master  antenna 
system  separately  from  individual  set 
antennae,  is  now  available  from  Tech- 
nical Appliance  Corp.,  17  E.  16th  St., 
New  York  City,  or  from  jobbers.  Com- 
plete line  drawings  of  practical  details 
are  included,  along  with  data  on  sur- 
veying buildings,  estimating  jobs,  in- 
stallation, testing,  trouble  shooting, 
maintenance,  etc. 


Complete  dope  on  166  types  of  glass, 
"G",  Midget  and  Coronet  tubes,  as  well 
as  38  types  of  ballast  tubes,  has  been 
released  in  a  revised  edition  of  the 
Arcturus  Tube  Data  Chart.  Issued  in 
handy  form  for  everyday  use,  the  chart 
is  free  from  jobbers  or  from  Arcturus 
Radio  Tube  Co.,  Newark,  N.  J. 


7L  jtaliXM, 

"DWARF" 

Fits  into  the  palm  of  your  hand 

THE  GREATEST 

MONEY- GETTER 

THAT  A  JOBBER  OR 

DEALER  COULD  HAVE 

•  A  profit-leader;   not  a  loss  leader. 

•  Far  more  beautiful  than  any  pic- 
ture can  show. 

•  Exclusive  gem-like  cabinets  resem- 
bling onyx;  four  colors. 

•  Brilliant  performance  and  remark- 
able tone. 

•  Tremendously  better,  for  only  a 
trifle  more. 

•  Larger  discounts  assuring  decent 
profit  to  jobber  and  dealer. 

•  No  cheapness  anywhere. 

•  Merchandise  that  holds  customers 
instead  of  losing  them. 

•  5-tube  AC-DC.  Broadcast  and  Po- 
lice calls.  Beam  power,  2  watts 
output.     Illuminated  dial. 


and  the 

PRICE 


$15 


00 

LIST 


Wire  or  write  for  full  details  of 
the  Halson  "Dwarf"  and  five 
other  smart  table  models,  all  big 
values  in  the  best-selling  price 
brackets. 

h 

RADIO  &  TELEVISION  CORP. 

MERIDEN,    CONN. 


ALSON 


August,  1938 


49 


/3oWP  R  0  F  I  T  S  ouik  tUu 
yw  WARD  AERIAL 


If  you've  been  looking  for 
a  quality  aerial  in  the  low 
price  bracket,  Ward's  new 
5XX  is  the  aerial  you 
want.  Complete  with  36"  approved 
Low  Loss  Shielded  Lead  Cable  and  in- 
sulated lower  bolt  assembly,  this  3-sec- 
tion,  telescopic,  side  cowl  model  sells  at 
only  $2.95  and  still  makes  you  a  hand- 
some profit  on  every  sale!  Easy  to  in- 
stall. Made  of  rustproof  Admiralty  metal. 

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See  what's  new  for  Fall  in  WARD'S 
complete  line  of  car  aerials.  Write  for 
free  catalog. 


E.    H.    RIETZKE 


PRES.    OF   CREI 


•  You  can  Laugh  at 
the  other  fellow 

if  you  have  the  training 
that   leads    to   better   pay ! 

CREI  technical  training  Is  the  first  step 
to  more   money   and  a   real  radio  Juture 

Here  is  the  opportunity  for  you  to  train  your- 
self for  a  better  job  in  Radio — at  home  in  your 
spare  time.  CREI  has  trained  thousands  of  men 
for  important  positions  in  broadcasting,  service, 
aviation,  marine  and  police  radio.  Constant  im- 
provements demand  better  men  to  have  the  im- 
portant jobs — and  that  means  a  better  job  for 
YOU  if  you  train  NOW! 

Write   for   the   CREI 
"TESTED   PLAN" 

Paste  the  coupon  below  on  a 
penny  post  card  and  receive 
your  copy  of  this  interesting 
and  inspiring  booklet.  If  you 
are  interested  In  the  advanced 
home- study  course  in  Service 
and  Public  Address  work, 
please  check  on  coupon. 


MAIL  THIS  COUPON  TODAY! 


CAPITOL      RADIO      ENGINEERING      INSTITUTE 
Dept.    RY-S,   3224  16th  St.,    N.W., 
Washington,    D.    C. 

Please  send  me  complete  details  and  FREE 
illustrated  48-page  booklet — "A  Tested  Plan  for  a 
Future  in   RADIO." 

Name      

Address    

City    □  Service 


JOBBER  ACTION 


A  new  distributor  for  the  new  line 
of  Howard  household  sets  is  the  E.  L. 
Chambers  Co.,  142  E.  McMicken  Ave., 
Cincinnati,  Ohio,  according  to  an  an- 
nouncement from  Howard  headquar- 
ters in  Chicago.  Radio  Supply  Co., 
also  of  Cincinnati,  will  continue  to 
handle  the  company's  line  of  communi- 
cations receivers. 

At  Harper-Meggee,  Inc.,  Seattle, 
Wash.,  distributors,  Stewart  Carter 
has  been  named  sales  manager  for 
RCA  products.  President  R.  F.  Meggee 
of  the  company  has  created  this  posi- 
tion to  handle  general  expansion  and 
"because  of  the  wide  variety  of  prod- 
ucts now  made  by  RCA." 

Stromberg-Carlson  has  named  Ten- 
nessee Valley  Appliances,  Inc.,  305 
Eleventh  Ave.,  S.,  Nashville,  Tenn.,  as 
distributor  in  the  part  of  Tennessee 
east  of  the  Tennessee  River,  accord- 
ing to  SC  jobber  manager  Fred  N. 
Anioal.  Head  of  the  distributor  firm 
is  J.  0.  Smith. 

In  the  Detroit,  Mich.,  area  and 
throughout  eastern  Michigan  the  firm's 
radios  will  now  be  distributed  by 
Specialty  Distributing  Co.,  Detroit, 
where  Leonard  Turnbull  is  head  man. 

Radio  Studios,  Inc.,  Salt  Lake  City, 
Utah,  with  branches  in  Logan  and 
Ogden,  are  also  new  distributors  for 
Stromberg-Carlson,  to  cover  parts  of 
Nevada  and  Idaho  and  all  of  Utah. 

General  manager  Harold  W.  Gold- 
stein of  Anchor  Lite  Appliance  Co., 
Pittsburgh,  Pa.,  jobbers  for  Crosley, 
reports  that  his  company  has  opened 
119  new  dealers  "to  sell  the  sensa- 
tional  1939  line  of  Crosley  radios." 

Major  Appliances,  Inc.,  Miami,  Fla., 
distributors  who  have  offices  at  Tampa 
and  at  Jacksonville,  have  been  ap- 
pointed jobbers  for  RCA  musical  mer- 
chandise, including  records,  needles, 
record  players  and  associated  products. 
Service  on  these  lines  will  be  offered 
to  dealers  from  the  Jacksonville,  Fla., 
branch  at  222  E.  Bay  St.  J.  Carl  Am- 
nions will  be  director  of  record  sales 
in  the  area;  Walter  C.  McDonald  will 
handle  orders  and  shipping.  W.  D. 
Rowlands  is  president. 


Guest  group  of  600  distributors  went 
to  the  three-day  Chicago  convention  to 
celebrate  the  appearance  of  the  82 
models  of  the  1939  Zenith  line.  Ap- 
plauded at  the  big  meeting  were  an- 
nouncement on  "Leadership  Giant 
Values,"  new  chairsides,  the  Radior- 
gan,  Transcontinental  Automatic  Tip 
Touch  Tuning,  a  battery  conservator 
for  farm  sets,  etc.  The  convention 
was  addressed  by  E.  F.  McDonald,  Jr., 
president;  Hugh  Robertson,  vice  presi- 
dent and  treasurer;  E.  A.  Tracey,  vice 
president  in  charge  of  sales;  J.  H. 
Rasmussen,  assistant  sales  manager; 
Edgar  G.  Herrmann,  advertising  man- 
ager; JV.  H.  Terwilliger,  sales  promo- 
tion manager;  Frank  Smolek,  service 
manager;  Hal  Blakeslee,  parts  and  ac- 
cessories manager;  R.  F.  Weinig,  man- 
ager of  the  automotive  division; 
Irving  Allen  of  the  E.  H.  Broicn  Ad- 
vertising Agency,  and  others. 

World  distributor,  exclusive,  for 
Bullet  microphones  is  the  Tilton  Elec- 
tric Corp.,  15  E.  26th  St.,  New  York 
City,  according  to  news  from  Trans- 
ducer Corp. 

A  new  radio  parts  jobber  in  New 
Orleans  is  Radio  Parts,  Inc.,  807  How- 
ard Ave.,  where  a  complete  line  of  re- 
placement radio  parts  and  standard 
make  amateur  equipment  will  be 
stocked.  Head  men  at  the  company 
are  Irving  Levi,  prominent  New  Or- 
leans amateur,  and  Joe  F.  d'Aquin,  for 
many  years  with  Shuler  Supply  Co.  of 
the  same  city. 


New  Detrola  jobbers  as  announced 
by  sales  manager  J.  J.  Davin  include 
Kelley-How-Thompson  Co.,  Duluth, 
Minn.,  and  Billings,  Mont.;  Brown 
Supply  Co.,  St.  Louis,  Mo.;  Polk  Mu- 
sical Supply  Co.,  Atlanta,  Ga.;  and 
Southwest  Music  Co.,  Dallas,  Tex.; 
Jones-Cornett  Electric  Co.,  Welch,  W. 
Va.;  E.  E.  Forbes  &  Sons  Piano  Co., 
Birmingham,  Ala.;  Radio  Television 
Co.,  Phoenix,  Ariz.;  Oakley  Electric 
Co.,  Boise,  Idaho;  Wilson  Music  Co., 
Oshkosh,  Wis.;  555,  Inc.,  Little  Rock, 
Ark.;  W.  B.  Davis  Electric  Co.,  Mem- 
phis, Tenn;  Williams  &  Shelton  Co., 
Inc.,  Charlotte,  N.  C;  Piedmont  Dis- 
tributors, Inc.,  Greensboro,  N.  C;  W. 
S.  Donan  Hardware  Co,  Richmond, 
Va. ;  Radio  Supply  Co.,  Norfolk,  Va.; 
True  &  Blanchard,  Newport,  Vt.,  and 
R.  B.  Wall  Co.,  Wilkes-Barre,  Pa. 


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50 


Radio  Today 


Hundreds  of  buyers  showed  up  at 
the  showrooms  of  Steem-Electric  Corp. 
last  month  at  the  New  York  House- 
wares Show,  Hotel  Pennsylvania.  Firm 
president  Ernest  F.  Pohl  was  on  hand, 


Ernest  F.   Pohl,   head   of  the 

flourishing  Steem-Electric  iron 

company,  St.  Louis. 

along  with  sales  representatives  Sam 
Weiner,  "L.  S.  Gershon,  Benny  Gins- 
burg,  Leonard  H.  Cooper,  H.  A.  Smith 
and  others.  Demonstrations  were  in 
charge  of  Bernadette  Eckstein,  educa- 
tional director.  Extra  batch  of  for- 
eign buyers  were  attracted  by  the 
$i:!.95  steam-electric  iron,  and  Mr. 
Pohl  announced  that  a  new  plant  will 
be  opened  in  Toronto,  Canada,  for  ex- 
port operations.  Headquarters  are  at 
1726  Lafayette  Ave.,  St.  Louis,  Mo. 

Pearson's  Radio  &  Electric  Service, 
1114  Park  St.,  Evansville,  Ind.,  reports 
that  "we  are  just  starting  new  in  the 
wholesale  business,  as  we  were  com- 
pletely cleaned  out  in  the  1937  flood." 
The  firm  is  headed  by  Wilfred  Pearson 
and  covers  about  15  countries  in  the 
area,  currently  using  two  outside  sales- 
men. Plans  are  being  made  to  add 
more  parts  lines,  and  to  take  on  re- 
ceivers. Sound  equipment  is  also  be- 
ing considered  by  the  company. 


Morroic-Thomas  Hardware  Co.,  Ama- 
rillo,  Tex.,  have  been  named  distribu- 
tors for  Sentinel  farm  and  city  radio, 
according  to  a  flash  from  general  sales 
manager  George  Russell. 


Radio  distributors  of  the  Eastern 
states,  200  of  them,  went  to  the  premier 
showing  last  month  at  Atlantic  City  of 
the  Stewart  Warner  1939  lines.  Sales 
manager  John  F.  Ditzell  was  the  direc- 
tor of  this  Radio  &  Appliances  Sales 
Conference,  with  vice-president  Frank 
E.  Hiter,  introducing  the  new  SW  house- 
hold appliances. 


Harold  Davis,  of  the  parts  distribu- 
ting firm,  Harold  Davis,  Inc.,  Jackson. 
Miss.,  recently  held  an  opening  of  a 
new  home  at  848  W.  Capitol  St.  Speak- 
ing to  the  guest  servicemen,  Mr.  Davis 
indicated  that  he  would  renew  his  fight 
with  Mississippi  newspapers  to  get 
radio  program  schedules  printed  daily. 
Citing  the  great  public  interest  in  the 
Louis-Schmeling  bout,  he  declared  that 
program  interest  was  the  basis  of  the 
radio  repair  business. 


Brown  Supply  Co.,  St.  Louis  distrib- 
utors for  Stromberg  Carlson  are  open- 
ing a  series  of  dealer  meetings  honor- 
ing the  new  SC  line.  This  jobber's  new 
technique  in  radio  merchandising  will 
be  based  on  "selective  selling  with  as- 
sured dealer  profit." 

Meeting  of  all  Stromberg  distribu- 
tors in  the  Southwestern  area  was  held 
last  month  in  Kansas  City  with  district 
representative  Oval  McCann  and  other 
company  officials  on  hand.  Brown 
Supply  sent  a  group  including  execu- 
tives Norman  S.  Brown,  Fred  A.  Wiebe. 
P.  A.  Ware,  Harold  R.  McCormack  and 
William  W.  Daney :  also  salesmen  Jim 
Summer,  R.  H.  Echtenkamp,  A.  W. 
Vogel,  L.  N.  Westmark,  and  others. 


RCA  jobbers  Frank  Mayer  Co.,  Inc., 
Corpus  Christi,  Texas,  are  now  estab- 
lished in  their  new  home  at  909  S. 
Staples  St.  The  expansion  includes 
modern  arrangements  for  stock  shelves, 
counter  space,  shipping  facilities  and 
parking  conveniences.  The  firm  pre- 
sented an  RCA  engineer's  pencil  with 
resistor  color  code  and  fibre  screw- 
driver to  each  dealer  in  the  new  store 
on  the  opening  day. 


E  A  SUCCESSFUL  COUNTRY 

A  P,o,i«ob.e  Practice  RADIO      DOCTOR 

Awaits  You.  with  the  Stark  Rural  Meter  you  can  be  a  COUNTRY   RADIO   DOCTOR 

in  every  sense  of  the  word.  For,  at  last,  you  have  a  combination  tube 
tester  and  analyzer  with  self-contained  power  supply,  designed  for 
rural   or  unwired   areas.        ""■ 

Enables  you  to  service  battery  radios  in  the  owner's  home  or  car, 
without  the  bother  or  time  loss  in  takino  the  chassis  to  the  shop. 
While  rendering  a  paid  service,  you  ca*i  increase  the  sale  of  tubes, 
batteries,    etc.     Also    make    more    contacts    and    get    more    prospects. 

FEATURES : 
Large  fan  type  (Poor-Weak-Good)  meter  ...  Hot  filament  short  test 
.  .  .  Cathode  leakage  test  sensitive  to  250,000  ohms  .  .  .  Tests  all 
DC  and  auto  radio  tubes  plus  many  AC  types  .  .  .  Three  DC  voltage 
ranges,  0-10-100-300  .  .  .  Three  resistance  ranges,  0-1000-100,000-1 
Meg.  .  .  .  RMA  standards  of  DC  tube  tests  .  .  .  Condition  of  self- 
contained  batteries  read  on  meter  by  the  flip  of  a  switch. 
Manufactured  in  U.  S.  A.  by 

,=-pr^r^rr|     ELECTRICAL   INSTRUMENTS 
=  ■'"■■*■*       418  So.  Wells  St.  Chicago,  III. 

In    Canada — Stark   Tube   Co.,   Toronto,    Ont. 

RURAL  METER  "ESS SEEKS* 


information  regarding  your 


ORE  WATTS 
ER  DOLLAR 


W  V 

Through  V 

efficient  utiliza-  ySs 
tion  of  the  unique  ygi 
heat  dissipating  qualities  V 
of  aluminum,  IRC  has  ' 
engineered  a  25-watt  flLL 
Metal  Rheostat  (Type  PR-25) 
no  larger  in  size  than  conven- 
tional types,  yet  with  approx- 
imately  one  half  the  tern- 
perature  rise  at  full  load. 

Actual  temperature  rise  for 
full  rotation  is  only  140°  C. 
measured  at  the  hottest  spot. 

In  addition,  due  to  highly 
efficient  conduction,  the  full 
25  watts  may  be  applied  across 
Vi  of  the  winding  area  with 
only  160°  C.  rise  at  the  hottest 
spot. 

Write  for  Section  VI  of  IRC 
Engineering    Data     for    full 
I      details  —  or   send   complete 


proposed   application   for 

our  recommendation  and 

sample  unit. 


ALL  METAL 

rheostat: 


INTERNATIONAL 

RESISTANCE  COMPANY 

401  N.  Broad   Street.  Philadelphia.  Pa. 

In  Canada:  1B7  Duchess  Street.  Toronto.  Ontario 


August,  1938 


51 


Complete  Details  on 
The  Instrument  Everyone  is  Talking  About 


Hold  everything  until  you've  read  this 
16-page  booklet  on  the  Rider  Chanalyst! 
It's  written  by  John  F.  Rider,  and  is  yours 
for  the  asking.  It  tells  the  how  and  why 
of  the  Rider  Chanalyst — What  it  is  .  .  . 
What  it  does  .  .  .  How  it  works  .  .  .  How 
it  enables  you  to  speed-test  your  service 
jobs  —  everything  you  want  to  know 
about  this  revolutionary  new  instrument. 
As  you  read  through  its  pages  you  will 
learn  how  the  Chanalyst  enables  you  to 
trace  the  passage  of  the  signal  from  the 
antenna  to  the  loudspeaker  in  r-f,  a-f 
or  i-f  stages,  and  localize  troubles  in 
each  stage  .  .  ,  How  to  check  operating 
voltages  at  any  point .  in  the  receiver 
without  loading  the  circuit,  no  matter 
how  complicated  the  circuit  .  .  .  How  to 
check  actual  control  voltages  developed 
by  the  signal  and  present  at  the  tube 
elements — a.v.c.  and  a.f.c.  characteris- 
tics .  .  .  How  to  check  bad  padders  and 

"THERE'S  ONLY  ONE 
RIDER    CHANALYST" 


SERVICE  INSTRUMENTS,  Inc. 

41  O   FOURTH    AVE.,    NEW    YORK    CITY 


coils  in  oscillator  section  in  a  super- 
heterodyne .  .  .  How  to  instantly  check 
wattage  consumption  of  the  receiver 
during  actual  operation  .  .  .  How  to 
quickly  spot  and  localize  troubles  in 
intermittent  receivers. 

These  are  only  a  few  of  the  multitude  of 
tests  which  the  Chanalyst  makes  pos- 
sible. Send  for  your  free  booklet  today 
on  this  remarkable,  essential  basic  new 
instrument. 


r~ 

i 
I 
i 


£Nd  For  Rn 

forOem       Jobi>*r 
Uem°nstrofio 


SEHVIcf  ^^^-» — , 


"1 
/ 

i 


TRADE  FLASHES 


Howard  Radio  Co.,  Chicago,  has  an- 
nounced the  appointment  of  Joseph. 
Muniz,  formerly  with  Hetro  Electrical 
Industries,  as  its  manager  in  charge 
of  export  sales. 

Walter  Marsh,  sales  manager  of 
Meissner,  is  making  an  extended  busi- 
ness trip  through  the  New  England 
States,  and  reports  that  jobbers  are 
finding  the  Meissner  parts  line  increas- 
ingly  popular. 

With  the  new  Sentinel  battery  and 
AC  lines  creating  tremendous  interest, 
George  Russell,  general  sales  man- 
ager, and  Ed.  May,  his  assistant,  are 
being  kept  busy  attending  Sentinel 
dealers'  meetings  throughout  the  coun- 
try. When  last  heard  from,  Mr.  Rus- 
sell was  in  Denver  and  Mr.  May  in 
Buffalo.  Both  report  enthusiastic  ac- 
ceptance of  the  Sentinel  1939  line, 
with  excellent  prospects  for  a  record 
volume  of  business  this  fall.  The  new 
Sentinel  1%-volt  models  with  phenom- 
enally low  battery  drain  are  attracting 
especial  interest  in  rural  regions, 
while  the  new  Sentinel  AC  line  with 
its  new  system  of  push-button  tuning 
is  proving  very  popular  in  the  city 
markets.  All  in  all,  it  looks  like  a 
good  year  for  Sentinel. 

Parker  H.  Erirksen.  for  the  past  two 
years  radio  sales  manager,  home  ap- 
pliance division,  Fairbanks  Morse,  and 
identified  with  radio  and  specialty 
merchandising  for  the  past  ten  years, 
has  resigned  the  Fairbanks  Morse  post 
to  become  associated  with  Fairall  & 
Co.,  a  Des  Moines,  Iowa,  advertising 
agency.  Commenting  on  the  change, 
L.  R.  Fairall,  president,  stated:  "Mr. 
Ericksen's  broad  background  and  ad- 
vertising knowledge,  of  national  char- 
acter since  1928,  will  strengthen  this 
agency's  ability  to  serve  certain 
clients.  His  appointment  is  another 
step  to  expand  and  improve  our  ser- 
vice." 

While  television  transmissions  in 
the  New  York  area  are  about  to  be 
resumed,  and  a  number  of  new  re- 
ceivers make  their  appearance  in  the 
market,  renewed  interest  has  been  re- 
ported in  the  now  famous  outline  of 
the  new  industry  as  presented  in  the 
book,  "Television.  A  Struggle  for 
Power"  by  Prank  C.  Waldrop  and 
Joseph  Borkin.  The  volume  is  pub- 
lished by  William  Morrow  &  Co.,  Inc., 
386  Fourth  Ave.,  New  York  City. 

Completely  new  farm  radio  models 
are  being  introduced  by  RCA ,  follow- 
ing an  extended  survey  of  the  rural 
radio  market  by  RCA  executives  John 
C.  Marden  and  G.  G.  Gerlack.  There 
will  be  two  series  of  sets;  one  will 
use  the  new  1%-volt  tube,  the  other 
is  a  line  of  6-volt  receivers  ranging 
from  four  to  eight  tubes. 

B.  L.  MacPherson,  702  Union  St., 
Ft.  Wayne,  Ind.,  is  now  the  sales  rep- 
resentative for  Clarostat  Mfg.  Co.,  Inc., 
Brooklyn,  N.  Y.,  in  the  Indiana  area. 
To  customers,  jobbers  and  prospects 
there,  Mr.  MacPherson  offers  experi- 
enced, expert  sales  help. 


52 


Radio  Today 


::?p:Ss:^;;;^ 

A  whiz  of  a  salesman — a  test  truck  now  used  by  Parris-Dunn  to  com- 
pare charger  units.     At  left  is  the  new  32-volt  outfit. 


J.  M.  Cartwright  is  the  new  factory 
representative  for  Howard  Radio  Co., 
1735  Belmont  Ave.,  Chicago,  for  the 
states  of  Arkansas,  Mississippi,  Louisi- 
ana and  western  Tennessee.  Cart- 
wright  offices  are  at  1288  Vinton  St., 
Memphis,  Tenn. 

Other  Howard  news  comes  from 
vice-president  Howard  Briggs:  with 
12  of  the  leading  parts  houses  in  New 
England,  franchise  plans  have  been 
completed  on  the  firm's  communica- 
tion receivers. 


Sparks  -  Withington  Co.,  Jackson, 
Mich.,  makers  of  Sparton  products, 
have  taken  out  a  facsimile  license 
under  the  patents  of  the  Finch  Tele- 
communication Laos,  37  W.  57th  St., 
New  York  City. 

State  and  county  fairs  throughout 
the  U.  S.  will  be  covered  this  season 
with  bigger  and  better  displays  by 
Wincharger  Corp.  and  its  dealers,  ac- 
cording to  a  firm  sales  executive,  TV.  A. 
Slekeloerg,  who  points  out  that  con- 
tests will  be  an  extra  feature  this  year. 


Maitland  K.  Smith,  635  N.  Highland 
Ave.,  N.E.,  Atlanta,  Ga.,  has  been  an- 
nounced by  Ward  Leonard  as  the 
firm's  representative  for  radio  resis- 
tors, rheostats  and  relays  in  the  states 
of  North  and  South  Carolina,  Georgia, 
Florida  and  Alabama. 


Two  foreign  service  engineers  for 
Philco's  American  Steel  Export  Co. 
recently  left  New  York  for  instruction 
trips  among  jobbers  abroad.  Gilbert 
headed  for  Morocco,  Algiers,  Tunis, 
Egypt  and  the  Far  East;  Hicks  went 
to  Central  and  South  America  and  the 
West  Indies. 


Eddie  (E.  G.)  May  has  been  promot- 
ed to  the  sales  department  of  Sentinel 
Radio  Corp.,  Chicago.  For  15  years 
he  was  active  at  the  firm's  headquar- 
ters; he  will  now  cover  the  Southern 
and  Southeastern  areas  for  the  com- 
pany. 


B-L  Electric  Mfg.  Co.,  the  St.  Louis, 
Mo.,  manufacturers  of  dry,  metallic 
rectifier  units,  battery  chargers,  bat- 
tery eliminators  and  special  power 
units,  have  appointed  two  new  repre- 
sentatives. Arthur  H.  Baier,  Cleveland, 
Ohio,  will  cover  the  state  of  Ohio  and 
the  city  of  Erie,  Pa.  Samuel  E.  Mac- 
donald,  Philadelphia,  Pa.,  will  cover 
the  state  of  Pennsylvania  (except  for 
Erie)  and  the  states  of  "West  Virginia, 
Maryland,  Virginia,  Delaware,  the  Dis- 
trict of  Columbia  and  the  following 
counties  in  New  Jersey:  Burlington, 
Ocean,  Camden,  Gloucester,  Salem, 
Cumberland,  Atlantic  and  Cape  May. 


MEISSNER 
VIBRATORS 

CHECKED  and  DOUBLE  CHECKED 
for  DEPENDABILITY 


THEY'RE  tested,  not  once, 
-*-  but  twice,  and  aged  be- 
tween tests — that's  the  rea- 
son why  servicemen  have  so 
little  trouble  with  Meissner 
Vibrators.  The  secret  of 
Meissner  dependability 
lies  in  the  aging-  given 
every  Meissner  Vibrator. 
Where  ordinary  vibrators 
are  manufactured,  tested 
and  shipped,  Meissner  Vibra- 
tors are  aged  so  that  the 
slight  metallurgical  changes 
that  sometimes  affect  the 
operation  of  any  vibrator, 
are  discovered  in  the  SEC- 
OND test  that's  given  every 
Meissner  Vibrator. 

You're  not  gambling  when 
you  install  a  Meissner  Vi- 
brator —  you  know  that  it 
has  received  every  possible 
test  and  will  give  your  cus- 
tomer the  long  and  depend- 
able service  that  makes 
friends— for   you  and  for  us. 


See  Your  Parts  Jobber 


MANUFACTURING 

CO. 

Mt.    Carmel,    Illinois 


FAMOUS     NAME     FOR     TWO     DECADES" 


UNIVERSAL  PRODUCTS 

for  1938 

STREAMLINED 

DYNAMIC  •  CRYSTAL  •  CARBON  •  VELOCITY 


NEW 


The    new    5    mm. 
ribbon. 


The   new    model 
Handi-mike. 


The     15     mm.     in 

dynamic,       crystal 

or    carbon. 

A  complete  new  line  of  microphones  and  recording 
equipment  approved  and  used  by  leading  broadcast 
stations,  transcription  studios,  laboratories,  schools  and 
universities  .  .  .  everywhere  that  tone  quality  and  faith- 
ful reproduction  is  demanded.  New  complete  16-page 
catalog  .  .  .  one  for  microphones  and  accessories  and 
one  for  recording  machines  and  discs  .  .  .  ready  for 
mailing.  Write  on  your  business  letterhead,  or  ask 
your  nearest  representative. 


IfaujeMaJ.  Mi&ixtfJume  Ga.,  £td. 

INGLEWOOD,  CALIFORNIA,  U.S.A. 


August,  1938 


53 


p^} 


PUSH-BUTTON   TESTING 


Mutual 
,tf~  Conduc- 

00*dk  tan« 

f^fc«Ri-  Per  Cent 

Scale 


Model   1616 
Only  $73.34 


Tube  Tester  and  Volt-Ohm-Milliammeter 

Many    Claim    Dynamic   Mutual   Conductance 
.  .  .  Triplett   Positively   Has  It. 

The  hit  of  the  Radio  Parts  Trade  Show  was  this  pace 
setting  push-button  tester  by  Triplett,  with  its  revolu- 
tionary advancements.  After  rotating  chart  to  the  tube  to 
be  tested,  the  button  to  push  is  clearly  marked  under 
each  row.  What  could  be  simpler? 

And  the  Dynamic  Mutual  Conductance  test  for  ampli- 
fiers and  power  tubes  not  only  shows  if  the  tube  is 
GOOD  or  BAD,  but  the  percentage  of  mu  to  the  100% 
Good  Condition  also  is  indicated.  In  critical  sets  this 
permits  the  dealer  to  pick  his  tubes  with  confidence. 
.  .  .  Diodes  and  rectifiers  are  tested  for  emission  accord- 
ing to  the  latest  approved  engineering  standards.  Gas  and 
Ballast  tube  continuity  test   included. 

Filament  location  switch  permits  application  of  filament 
voltages  to  any  prongs  of  the  tube.  The  same  is  true  for 
Plate  location,  screen  location,  e.g.  location,  etc.  This 
selective  feature,  together  with  a  spare  socket,  is  an 
anti-obsolescence  factor. 

Rotate  chart  to  Volt-Ohm-Milliammeter  settings — push 
button  for  DC  scales:  0-10-50-250-500-1000  Volts  at 
1000  Ohms  per  Volt;  0-10-50-250  M.A.;  .2  Ohms  to  500 
Ohms  —  300,000  Ohms  —  l'/2  Megohms  —  3  Megohms; 
0-10-50-250-500-1000  AC  Volts  at  400  Ohms  per  Volt; 
decibel  chart  furnished  to  42  db's.  (Ohmmeter  is  line 
powered  and  provision  is  made  for  using  batteries  if 
desired).  Uses  two  interchangeable  plug-in  type  recti- 
fiers, simplifying  replacement  in  case  of  unintentional 
damage.  One  is  in  the  tube  tester  circuit,  the  other  for 
the  Volt-Ohm-Milliammeter. 

Furnished  in  attractive,  all-metal  case  with  lustrous  fin- 
ish. Removable  cover  for  portable  or  counter  use  .  .  . 
sloping   panel. 

MODEL  1615 — Dynamic  Mutual  Conductance  Tube  Tester 
only  with  Push-Button  testing.  Dealer  Price  $63.34 
MODEL   1610 — True    Emission    Type   Tube   Tester   with 

Push-Button  Testing.  Dealer  Price $39.00 

MODEL  1611 — True  Emission  Type  Tube  Tester  with 
Push    Button    Testing    and    Volt-Ohm-Milliammeter. 

Dealer  Price  $49.50 

See  Tbem  At  Your  Jobbers — or  Write 
FREE — S    pp.    two-color    catalog    listing    today's    most 


complete  line  of  test  equipment. 

THE 

19S 

Nam 
Addr 
City 

TRIPLETT  ELECTRICAL   INSTRUMENT  CO. 

Harmon  Dr.,  Bluffton,  Ohio 
Please  send  me   more  information   on 

□  Model  1616                 □  Model  1615 

□  Model  1610                 D  Model  1611 

TRADE  FLASHES 


New  line  of  radios  for  export  has 
been  announced  by  Pliilco's  export 
manager  Walter  8.  Cranmer.  They 
will  have  the  name,  Philco-Tropic,  and 
will  be  of  special  design,  to  fit  the 
needs  of  international  trade. 

Howard  Radio  Go.  has  a  new  repre- 
sentative for  its  communication  re- 
ceivers in  Pennsylvania,  West  Vir- 
ginia, Maryland,  Delaware,  "Washing- 
ton, D.  C,  and  eastern  Ohio — 0.  Olsen, 
of  Pittsburgh,  a  well  known  parts 
representative. 

Another  new  Howard  representative 
is  P.  D.  Terwilliger,  Rochester,  N.  Y., 
who  will  handle  the  communication 
sets  in  the  State  of  New  York,  except 
in  the  Metropolitan  area. 

President  James  R.  Fouch  of  Uni- 
versal Microphone  Co.,  Inglewood, 
Calif.,  has  just  finished  a  two-month 
vacation  at  Balboa  Island. 

At  Duke  Appliances,  radio  and  ap- 
pliance dealers  of  426  Wabash,  Terre 
Haute,  Ind.,  store  quarters  have  been 
remodeled  and  improved  for  general 
expansion.  The  firm  now  shares  floor 
space  with  a  music  dealer,  Brewer 
Music  Co. 

M.  F.  Klicpera,  for  the  past  9  years 
western  sales  manager  for  Operadio 
and  for  Webster-Chicago,  has  now  es- 
tablished manufacturers'  representa- 
tive offices  in  Houston,  Tex.,  P.  O.  Box 
2397.  He  will  cover  the  states  of  Texas, 
Oklahoma,  Louisiana  and  Arkansas, 
where  he  is  acquainted  with  many  job- 
bers and  their  problems.  Mr.  Klicpera 
will  offer  special  merchandising  ser- 
vice to  jobbers,  will  travel  regularly 
in  his  area,  and  will  otherwise  special- 
ize in  sales  promotion  on  a  limited 
number  of  lines. 

Indian  Products  Corp.,  Chicago, 
makers  of  the  "Koolroom"  self-con- 
tained air  conditioning  units,  have 
made  a  series  of  test  advertisements 
on  the  merchandise  and  general  sales 
manager  I.  R.  Rozett  reports  that  his 
sales  offices  "have  been  swamped  by 
the  enthusiastic  reception."  With  a 
good  reaction  from  foreign  markets  as 
well,  Mr.  Rozett  predicts  a  big  year  for 
the  nine  Koolroom  models. 

Frank  A.  Arnold  has  been  elected 
vice-president  of  Edwin  Bird  Wilson, 
Inc.,  120  Wall  St.,  New  York,  in  charge 
of  its  radio  department.  The  adver- 
tising agency,  which  has  specialized 
for  22  years  in  the  financial  field,  an- 
nounced that  it  recognizes  by  this  step 
the  rising  interest  in  radio  among 
banks,  trust  companies  and  other  fi- 
nancial services,  as  well  as  in  the  gen- 
eral field  of  public  relations.  Mr.  Ar- 
nold was  for  6  years  Director  of  Com- 
mercial Development  of  the  National 
Broadcasting  Co.,  following  his  resig- 
nation as  Secretary  and  Director  of  the 
Frank  Seaman  Advertising  Agency. 
He  is  author  of  "Broadcast  Advertis- 
ing, the  Fourth  Dimension,"  a  tele- 
vision edition  of  which  has  recently 
been  published. 


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54 


Radio  Today 


•     INDEX     • 

TO 

ADVERTISEMENTS 


Page 

ABC    RADIO    LABORATORIES    47 

AMPERITE    CO 3S 

ANDREA   RADIO   CORP Cover  3 

ANSLEY    RADIO    CORP 45 

BELDEN    MFG.    CO 37 

CAPITOL   RADIO    ENG.    INSTITUTE 50 

CENTRALAB      40 

CINAUDAGRAPH    54 

CLAROSTAT  MFG.  CO.,    INC v 47 

CROSLEY  RADIO   CORP 35 

FAIRBANKS,    MORSE   &   CO 23 

GALVIN   MFG.  CORP 39 

GENERAL   ELECTRIC   CO Cover    2 

GENERAL    INDUSTRIES   CO 48 

HALSON   RADIO   &  TELEV.   CORP 49 

HYGRADE   SYLVANIA    CORP 4 

INTERNATIONAL   RESISTANCE   CO 51 

JANETTE   MFG.    CO 50 

JENSEN   RADIO   MFG.  CO 43 

KEN-RAD    TUBE    &    LAMP    CORP 49 

MAJESTIC   RADIO   &  TELEV.   CORP 41 

MALLORY  &  CO.,   INC.,   P.   R 1 

MEISSNER    MFG.    CO 53 

NOBLITT-SPARKS    INDUSTRIES,    INC 27 

ONAN   &  SONS,   D.  W 54 

PARRIS-DUNN    CORP 45 

PHILCO   RADIO   &  TELEV.  CORP.,  SET  DIV.     S 
PHILCO  RADIO  &  TELEV.  CORP.,  TUBE  DIV.     3 

RADOLEK    55 

RAYTHEON    PRODUCTION    CORP Cover  4 

RCA    MFG.    CO.,    INC.,    COMM'L   SOUND 45 

RCA   MFG.   CO.,    INC.,   RCA  VICTOR   DIV....     7 

READRITE   METER  WORKS 55 

REGAL  AMPLIFIER   MFG.  CORP 48 

SERVICE    INSTRUMENTS,    INC 52 

SONORA   RADIO   &  TELEV.   CORP 2 

STARK   ELECTRICAL   INSTRUMENTS   51 

STEWART-WARNER    CORP 25 

STROMBERG-CARLSON    TELE.    MFG.    CO....     5 

TRIPLETT  ELEC.    INSTRUMENT  CO 54 

TUNG-SOL  LAMP  WORKS,    INC 6 

UNIVERSAL   MICROPHONE  CO.,   LTD 53 

WARD   PRODUCTS  CORP 50 

WEBSTER-CHICAGO     46 

WESTINGHOUSE   MERCHANDISING   HQRS...   29 

WESTON    ELEC.    INSTRUMENT   CORP 31 

ZENITH    RADIO   CORP 21 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against  the 
possibility  of  an  occasional  change  or 
omission   in  the   preparation   of  this   index. 


Presenting  the  chief  radio  en- 
gineer  for    Fairbanks  -  Morse, 
Edward  B.  Passow. 


ACOUSTIC  CHAMBER 
WITH  40-FOOT  ROOF 

A  new  laboratory  addition  is  being 
constructed  by  trie  Jensen  Radio 
Manufacturing  Co.,  Chicago,  that  will 
add  6,000  square  feet  of  floor  space 
and  the  most  modern  acoustical  lab- 
oratory facilities.  A  feature  of  this 
addition  will  be  a  large,  windowless 
room  with  a  40-foot  ceiling. 

The  interior  of  this  space  will  be 
arranged  with  a  complex  system  of 
rigging,  designed  to  effectively  locate 
acoustical  measuring  equipment  in  re- 
lation to  products  which  are  the  sub- 
ject of  investigation.  The  roof  of  the 
40-foot  tower  will  be  equipped  with 
similar  rigging  to  facilitate  outdoor 
measurements. 

Hugh  S.  Knowles,  Jensen  chief  en- 
gineer, widely  recognized  as  an  emi- 
nent authority  on  acoustics,  stated : 
"The  laboratory  features  embodied  in 
our  new  factory  addition  are  unique 
in  the  field  of  acoustical  research  and 
development.  It  will  greatly  improve 
our  facilities  and  will  be  particularly 
useful  in  the  development  and  per- 
fection of  high-fidelity  loud  speakers 
and  equipment  for  theatres  and  public 
address." 


Tore  Lundahl  of  Technical  Appliance 
Corp.,  New  York  City,  sailed  recently 
for  an  8-week  tour  of  Europe.  With 
Mrs.  Lundahl,  lie  will  visit  England, 
Sweden,  Denmark,  Holland  and 
France,  for  combined  business  and  va- 
cation. 

M.  Yankossky,  well  known  New  York 
radio  man  formerly  with  Baltimore 
Radio  and  with  American  Sales,  Is  now 
with  Yankee  Radio  &  Sound  Service, 
1620-26  St.  Johns  Place,  Brooklyn, 
where  production  will  be  started  soon 
on  a  full  line  of  public  address  units 
and  components. 


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•  Everything  you  need  in  radio.  It's  all  in 
this  new  1939  RADOLEK  RADIO  PROFIT 
GUIDE.  Every  repair  part  for  every  receiver. 
Newest  radio  receivers.  New  1939  model  public 
address  amplifiers;  outputs  from  5  to  100  wattj. 
New  model  public  address  speakers.  Test  instru- 
ments, Technical  books.  Special  equipment.  Lead- 
ing standard  brands.  Every  item  guaranteed.  It 
must  be  right  or  we  make  it  right. 

•  And  everything  under  one  roof.  You  get 
what  you  want  promptly,  and  exactly  what 
you  want.  Radolek's  immense  stock  plus  Bado- 
lek's  efficient  organization  insures  you  fastest  ser- 
vice. 25,000  servicemen  depend  on  this  service 
and  benefit  by  Radolek's  lowest  prices.  Send  now 
for  your  copy  of  Radolek's  Radio  Profit  Guide. 
You  save  time  and  money  at  Radolek! 

Gfo  RADOLEK- Cp. 

601 W.  Randolph,  Chicago,  Dept.  D-22 

Send    me    the    New    1939    Radolek    Profit    Guide 
FREE. 

Name    

Address    

Serviceman?  □       Dealer?  □       Experimenter?  Q 


August,  1938 


55 


RADIO  TOMORROW 

By  Owen  D.  Voting,  Chairman  of  the  Board, 
General  Electric  Company 


(From  an  address  delivered  by  Mr. 
Young  at  the  dedication  of  the  Gen- 
eral Electric  Company's  new  broadcast 
station,  WGY,  in  Schenectady,  N.  Y., 
July  9) 

Here  at  Schenectady,  on  February 
20,  1922,  "WGY  put  out  its  first  pro- 
gram. 

And  then  the  greatest  development 
of  all,  unforeseen  except  by  a  few  radio 
engineers  of  vision,  the  marvel  of 
broadcasting. 

Every  boy  up  and  down  this  valley, 
who  could  put  together  a  little  crystal 
set,  was  thrilled  by  this  great  achieve- 
ment. The  older  people  did  not  care 
much  about  it  at  first,  and  many  of 
them  did  not  believe  that  it  was  true 
anyhow. 

Now  those  boys  have  grown  to  mid- 
dle age;  the  oldest  of  the  older  ones 
have  gone.  We  live  in  a  broadcast  age, 
the  consequences  of  which  no  man  can 
measure. 

Engineers  develop  instrumentalities; 
they  are  not  responsible  for  their  use. 
That  is  true  whether  they  devise  mech- 
anisms for  war  or  peace. 

Peopfe  wili  decide 

Whether  broadcasting  serves  this 
country  or  the  world  well  or  ill,  lies 
not  in  the  hands  of  the  engineer,  but 
in  him  who  uses  the  instrument,  in- 
fluenced as  he  must  be  by  the  reaction 
of  his  listeners.  Now  for  the  first  time, 
tie  people  of  the  United  States,  not 
the  engineers,  not  the  broadcasting 
companies,  must  decide  what  radio 
shall  do  and  what  it  shall  not  do. 

If  one  assumes  that  arts  advance 
with  comparable  speed,  radio  is  today 


where  the  electric  and  power  industry 
was  at  the  turn  of  the  century.  Then 
we  thought  there  was  little  more  to  do 
in  the  application  of  electric  energy 
to  light  and  power.  The  fact  is  that 
the  great  strides  in  practical  applica- 
tion have  been  made  since  then. 

Only  radio's  dawn 

Will  it  be  so  with  radio?  Have  we 
so  far  seen  only  the  promising  dawn — 
not  the  noon-day — of  a  great  new  art? 
Imaginative  engineers  tell  us  so. 

One  must  remember  that  the  hazy 
dreams  of  today  become,  in  skilled 
hands,  the  realities  of  tomorrow. 

Shall  talking  pictures  be  laid  down 
in  every  home? 

Shall  newspapers  be  created  there  by 
facsimile  without  the  daily  shipment 
of  pieces  of  paper? 

Shall  telephones  be  in  every  button- 
hole? 

Shall  we  see  "the  world  around,"  as 
we  now  hear  the  world  around? 

Shall  we  find  this  earth  too  small 
and  some  time,  somewhere,  reach  into 
the  vast  spaces  of  the  universe  to  grat- 
ify that  insatiable  curiosity  of  the  hu- 
man mind  as  to  what  we  are  and  why 
we  are? 

The  answer  is  not  for  me  to  make — 
nor  however  difficult,  it  is  not  for  you 
to  spurn. 

All  we  can  say  is  that  as  the  years 
go  on,  we  will  adopt  the  latest  and 
best  facilities.  And  then  we  will  hold 
again,  from  time  to  time,  dedications 
of  new  instrumentalities  doing  those 
things  which  are  only  dreamed  of  now, 
and  perhaps  even  those  things  which 
have  not  reached  the  state  of  dreams. 


Owen  D.  Young  towers  above  the  group  at  the  WGY  opening.  From  left:  E.F. 
W.  Alexanderson ;  Mrs.  Young;  Kolin  Hagar,  WGY  manager;  Chester  H.  Lang, 
advertising  manager,  General  Electric;  Mr.  Young;  and  L.  R.  Lohr,  president  NBC. 


TELEVISION  IS 
ON  THE  WAY! 

Television  will  be  on  the  air  again 
in  New  York  City  early  in  September. 
The  National  Broadcasting  Company, 
in  cooperation  with  RCA  engineers, 
has  been  rebuilding  parts  of  its  Em- 
pire State  Tower  transmitter  during 
the  summer  months  and  now  plans  to 
have  everything  in  readiness  to  put 
regular  television  transmissions  over 
the  Metropolitan  area  by  Labor  Day. 
Programs  will  be  produced  in  the  tele- 
vision studios  in  Radio  City,  and  with 
the  new  transmitter  improvements, 
clear  video  signals  are  expected  to  be 
picked  up  within  a  40-  to  60-mile 
radius  of  the  transmitter. 

CSS  soon 

Television  programs  from  Columbia 
Broadcasting  System's  new  transmit- 
ter, to  be  located  at  the  top  of  the 
1,000-ft.  Chrysler  Tower  in  New  York, 
are  promised  for  October.  So  far, 
however,  very  little  construction  work 
has  been  completed,  and  the  coaxial 
cables  which  are  to  connect  the  CBS 
studios  at  485  Madison  Ave.  with  the 
Chrysler  Tower  RCA  transmitter  have 
not  yet  been  pulled  in  by  the  telephone 
company.  When  the  CBS  television 
station  goes  on  the  air,  it  will  present 
experimental  programs  under  the  di- 
rection of  Gilbert  Seldes,  designed  to 
test  out  fully  the  dramatic  and  artistic 
possibilities  of  sight-and-sound  enter- 
tainment. 

Television  sets 
from  abroad 

With  the  resumption  of  television 
programs  in  the  New  York  area, 
preparations  are  underway  to  supply 
receivers  to  the  public,  to  meet  the 
expected  demand.  Already  British 
television  receivers  are  trickling  into 
the  New  York  market,  coming  from 
London,  where  television  has  now  been 
a  regular  service  for  two  years.  These 
English  sets  are  being  adapted  for  the 
441-line  U.  S.  standard  and  offered  in 
the  New  York  territory.  Dumont  Lab- 
oratories, Montclair,  N.  J.  are  import- 
ing television  sets.  Hamilton  Hoge,  480 
Lexington  Ave.,  New  York,  is  handling 
the  Pye  receiver. 

U.  S.  receivers 

American  Television  Corporation, 
130  W.  56th  St.,  New  York,  which  came 
out  with  a  $125  television  set  in  the 
Spring,  will  be  ready  with  a  line  of 
receivers  for  Fall  running  into  higher 
price  brackets.  For  its  television  re- 
ceiver it  has  coined  the  name 
"Videor";  for  its  remote  unit,  "Kinet." 
National  Television,  Inc.,  480  Lexing- 
ton Ave.,  New  York,  is  understood  to 
be  getting  ready  a  set  to  be  sold  for 
$400. 

The  Bridgeport  plant  of  the  General 
Electric  Company  has  been  quietly 
preparing  test  models  of  a  home  tele- 
vision receiver  during  recent  months. 
The  company  is  also  erecting  a  tele- 
vision transmitter  at  Schenectady,  and 
evidently  has  big  plans  for  television 
development. 


56 


Radio  Today 


For  20  years,  Frank  A.  D.  Andrea  has 
been  known  as  the  manufacturer  who 
built  his  own  success  bv  making  the 
success  of  his  jobbers  and  dealers  his 
first  consideration.  Today,  this  policy 
is  continued  by  Andrea  Radio  Corp. 
under  his  ownership  and  management. 
The  jobber  and  dealer  who  handles 
Andrea  Radio  will  do  so  at  a  profit. 
Every  detail  of  the  Andrea  set-up  is 
shaped  to  assure  that. 


F.  A.  D.  ANDREA  "Presents 

AN  DRE  A  RADIO. .  the  profit  line  for 

Andrea  Radio  receivers  have  that  EXTRA  appeal  to  the  public  taste  .  .  .  Cabinets 
of  modern  styling  and  ingenious  design  .  .  .  "Studio  Tone"  with  balanced  treble 
and  base  response  .  .  .  life-time  automatic  push-a-button  tuning  .  .  .  quality 
represented  by  20  years  of  leadership  in  the  radio  industry.  And  in  addition, 

ANDREA  RADIO  has  PROFITS  for  JOBBER  and  DEALER 

Yes,  there  is  still  big  money  for  jobbers  and  their  dealers  when  they  have  the 
active,  progressive  cooperation  from  the  factory  that  has  characterized  Andrea 
merchandising  methods  since  the  beginning  of  broadcasting. 

Andrea  methods,  as  you  know  from  past  experience,  are  your  assurance  of  full, 
legitimate  profits,  and  your  protection  from  ruinous  price  competition  and  dumping. 
To  both  jobbers  and  dealers,  the  Andrea  Radio  line  is  the  1939  line  on  which  radio 
profits  can  be  built  up  again  ! 


1939 


MODEL  2-E-6:  Most  admired 
among  all  1939  table  models  is 
this  distinctive  Andrea  6-tube, 
3-band  receiver  available  for  AC 
or  AC-DC.  H.  10%  ins.,  W.  1714 
ins.,  D.  914  ins. 


MODEL  6-E-6:  phono-radio 
features  Andrea  type  sloping 
dial.  MODEL  4-E-6  console 
has  top  compartment  where 
turntable  and  pickup  can  be 
installed  subseguently.  AC  or 
AC-DC  models  available.  H. 
34%  ins.,  W.  24  ins.,  D.  17  ins. 


MODEL  14-E-6:  Six-tube 
model  that  packs  the  power  of 
last  year's  8-tube  sets.  Walnut 
and  rosewood  cabinet  of  rare 
beauty.  H.  9  ins.,  W.  1614 
ins.,  D.  7ye  ins. 


MR.  DEALER!  Here  is  an  exclusive  feature  of  the  1939  Andrea 
line.  With  8  Andrea  sets  on  your  floor,  you  can  actually  demonstrate 
15  different  models,  including  table,  console,  and  manual  or  auto- 
matic combination  types,  ranging  from  $19.95  to  $220.00! 


MODEL  8-E-1 1 :  Startling 
innovation!  Phono-radio 
with  "Andrea  Disappearing 
Turntable"  —  beautiful, 
convenient,  original  —  the 
feature  combination  of  1 939. 
Available  for  AC  or  AC-DC. 
8  or  1 1  tubes  AC — 1 2  tubes 
plus  3  ballast  tubes  AC-DC. 
H.  4014  ins.,  W.  26  ins.  D. 
15%  ins. 


MR.  JOBBER  .  .  . 

A  number  of  excellent  territories  are  still  open. 
Beautiful  New  Catalogue  Ready.  Phone,  wire 
or  write  for  full  details  today  to  ANDREA  RADIO 
CORP.,  4820-48th  Ave.,  Woodside,  L.  I.,  N.  Y. 


-OndmnJaoicr 


..■S.wr«»»» 


~ 


WORLD'S  LARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS' 


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NEW  G-E  BEAM-A-SCOPt  KADIO 

PRICED  TO  BECOME  THE  YEAR'S  BEST  SELLER 


MORE  G 


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,NG  __  Another  G-E  * 

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Brand-new  w 


nt        The     ne 

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w   g4=  Model  e^ 

vou  to  P"r*"t""L 


Program 


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7 all    the  programs 

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the    G-1 
Pre-selector 

>OU.5elefor24'ho'ars-head.l 
sta*,0"tl    ,     No    re-dialing- 
"T%  -  —  nd  it  tune, 
rVe   Programs  you  -nt. 


Set 


mmmmammmJ 


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'A'     V' 


NEW  POPULAR. PRICED 
GENERAL  ELECTRIC  RADIO 

Needs  No  Aerial  —  No  Ground  Wires 

•  Here's  news  that  spells  greater  profit  op- 
portunity for  every  G-E  Radio  Dealer.  General 
Electric  presents  a  new  model  G-99  equipped 
with  the  amazing  Beam-a-scope  —  the  scoop 
feature  of  the  year,  at  the  lowest  price  at  which 
this  deluxe  feature  has  been  offered. 

The  Beam-a-scope  is  a  sales  sensation.  It 
makes  the  new  G-E  the  one  radio  that  does  not 
need  to  be  anchored  in  a  fixed  location.  It  oper- 
ates in  any  spot  —  in  any  room.  No  aerial  — ■ 
no  ground  wires!  Just  plug  it  in  like  a  floor 
lamp  —  anywhere. 

Also  the  Beam-a-scope  reduces  local  static 
interference  —  gives  finer,  quieter  reception 
—  especially  in  noisy  areas. 

It  pays  to  line  up  with  G-E  Radio  —  this  year 
more  than  ever. 


GENERAL  ®  ELECTRIC 


These  |  Volume  Control  Developments 

"Speak  Volumes"  for  what  MALLORY-YAXLEY 

has  done  to  make  the  Service  Man's  job 

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Universal  Design — for  extreme  flexibility  and 
quick,  sure  replacements.  Mallory-Yaxley 
engineering  made  it  possible  to  develop  univer- 
sal designs  to  meet  all  service  needs. 


0 


Velvety  Smooth  Operation  —  through  the 
silent  carbon  element,  the  "non-rolling"  roller, 
the  silent  "M"  construction,  perfect  smooth 
tapers,  silver-to-silver  contacts  —  all  Mallory- 
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€> 


Channel  Shaft  —  to  fit  all  types  of  knobs  by 
use  of  the  special  insert.  An  easy-to-cut  alum- 
inum shaft  may  be  fitted  to  any  knob  and  any- 
one of  five  attachable  switches.  A  Mallory- 
Yaxley  help  for  swift  servicing. 


© 


Universal  Midget  Controls  —  with  Plug-in 
Shafts.  Flexible,  adaptable  and  universal.  10 
Mallory-Yaxley  Midget  Controls  plus  17  Plug- 
in  Shafts  now  give  the  servicing  range  of 
170  ordinary  exact  replacement  controls. 


The  "M.  Y.  E."  makes  the  service  man's  job  easier,  too- 


Read  what  the  magazine  SERVICE  says  of  the  Mallory-Yaxley 
Radio  Encyclopedia: — "Let  it  be  said  that  here  is  a  book  primari- 
ly for  the  service  man — written  in  his  language,  and  one  which 
will  give  its  readers  many  profitable  hours  in  more  ways  than  one 
.  .  .  the  book  is  on  the  'must'  list  of  every  radio  service  man  .  .  . 
an  almost  inexhaustible  store  of  up-to-the-minute  information." 


Get  your  copy  today  from  your  distributor 


^       J    IJ:I'.MH.1:1'J:1.I.IW1  m     J 

MallorY 

REPLACEMENT 
CONDENSERS. . .  VIBRATORS 


P.  R.  MALLORY  &  CO.,  Inc. 
INDIANAPOLIS  INDIANA 

Cable  Address— PELMAUO 


RADIO  TODAY,  September,  1938,  Vol.  IV,  No.  9,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription 
price  U.  S.  and  Latin  American  countries:  $1.00  for  2  years.  Canada:  $1.25  for  2  years.  All  other  countries  $2.00  for  2  years;  single  copy,  25c.  Entered 
as  second-class  matter  July.  24,  1936,  at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.  Printed  in  U.S.A.  Member  of  A.  B.  C. 
Copyright   1938  by  Caldwell-Clements,  Inc. 


^M 


- 


THOUGH      a     milligram     is      only 
35/100,000ths   of  an  ounce — it  means 
a  lot  to  this  Sylvania  workman. 

Just  the  right  amount  of  coating  mate- 
rial must  be  sprayed  on  a  cathode  to  in- 
sure its  long  life.  So  as  a  check-up  to 
this  process — a  Sylvania  expert  precision- 
weighs  samples  from  each  batch  of 
cathodes  coated.  Then  he  completely 
removes  the  coating  .  .  .  weighs  them 
again.     The    difference   in   weight   repre- 


sents the  amount  of  coating  present — and 
this  amount  must  meet  a  set  Sylvania 
standard  of  perfection. 

Intricate?  —  Yes.  Difficult?  —  Very. 
Worth  it? — Decidedly!  For  only  by  pre- 
cautions such  as  this — taken  at  every 
step  of  manufacture — can  we  be  sure 
of  A-l  quality  in  the  finished  tube  .  .  . 
and  satisfied  customers  and  repeat  sales 
for  you.  Hygrade  Sylvania  Corp.,  Em- 
porium, Pa.  Cable  HYSYLVANIA,  N.Y. 


Hygrade  Sylvania  Corporation  Also  Manufactures  The  Famous  Hygrade  Lamp  Bulbs. 


SYLVANIA 


SET-TESTED     RADIO    TUBES 


Radio  Today 


FRONT  PAGE  NEWS! 


With  More  Than  15,000,000  Circulation 
in  National  Magazines  .  .  . 

(AMERICAN  WEEKLY   •    SATURDAY  EVENING  POST 
COLLIER'S    •    LIFE    •    ESQUIRE) 


With  More  Than  20,000,000  in 
Local  Newspapers  .  .  . 


Starting  Next  Month 


.  .  .  will  be  Promoted  by  the  Biggest 
— Most  Dramatic  Advertising  Cam- 
paign in  All  EMERSON  History! 


Radio  and 
Television 

•^  Announcements! 


Mdioand  Watch  for  Detailed 


EMERSON  RADIO  AND  PHONOGRAPH  CORPORATION  •111  Eighth  Avenue  •  New  York,  N.  Y. 

"World's  Largest  Maker  of  Small  Radios" 

September,  1938  3 


U.  - 


Ttcelve-tube  Console  Grand 


•  The  new  series  of  Fairbanks-Morse  radios  is  built  for  the  profitable  type 
of  customer  who  can  and  will  buy  when  he  (or  she)  sees  and  hears  the 
difference  between  these  and  ordinary  radios.  There  is  not  a  "me,  too" 
model  in  the  line — not  one  that  is  like  some  other  radio  the  prospect  has 
seen  elsewhere.  Each  is  a  fine  musical  instrument  that  gives  a  new  thrill  to 
listening.  The  line  includes  no  superfluous  stock  which  serves  only  to  increase 
inventory.  There  are  no  short -discount  models.  You  get  your  normal  and 
rightful  profit  from  every  sale,  while  selling  is  made  easier  by  a  name  that 
has  enjoyed  public  confidence  for  more  than  100  years.  For  complete 
details,  write  or  wire  Fairbanks,  Morse  &  Co.,  Home  Appliance  Division, 
2060  Northwestern  Ave.,  Indianapolis,  Ind. 

DDfinTARIP    M  n  n  Fl  \    THE  new  Fairbanks  morse  line  of  radios  includes  table,  console, 

rnUll  IHDLL    mUULLO    AND  CONSOLE-GRAND  MODELS  WITH  7-,  9-,  AND  12-TUBE  CHASSIS 
WORTH-WHILE     FEATURES: 

•  Complete  permeability  tuning 


•  Instant  Electric  Tuning 

•  Acousti-Sealed  Tone  Chamber 

•  Monitor  Panel 

•  Cabinetry  of  highest  quality  with 
interlocking  construction 


•  Clearer  and  stronger  short-wave 
reception 

•  Plus  the  most  startlingly  realistic 
tone  vou  have  ever  heard  in  a  radio 


Console  Onmi 


A     TRULY 


FAIRBANKS-NURSE   RADIO 


RADIO 


Radio  Todav 


September,  1938 


1 


It  will  pay  you  to  be 

Heady  to  60! 

NATIONAL  ANTENNA  CHECK-UP  WEEK 


The  week  of  October  15  to  22  is 
National  Antenna  Check-up  Week 
sponsored  by  Belden. 

The  purpose  of  this  week  is  three- 
fold— 

1st — To  benefit  the  radio  receiver 
owner  by  improving  reception. 

2nd — To  increase  the  sales  of  an- 
tennas and  parts. 

3rd — To  sell  more  labor  in  essen- 
tial servicing  operations. 

Behind  National  Antenna  Check- 
up Week  is  a  tremendous  publicity 
program.  Large  advertisements  are 
appearing  in  Saturday  Evening  Post 
and  Collier's  with  a  total  circulation 
of  5,500,000.  Publicity  is  being  re- 
leased to  the  leading  trade  papers, 
magazines,   and   radio   stations 


throughout  the  country.  Twenty-six 
million  set  owners  are  going  to  be- 
come antenna  conscious  and  "better- 
listening"  conscious. 

How  You  Can  Tie  In  with  National 

Antenna  Check-up  Week 
During  the  next  few  days,  tie-in  ma- 
terial will  be  sent  radio  dealers  and 
servicemen  throughout  the  country. 
Window  streamers  will  be  included 
to  identify  your  shop  with  National 
Antenna  Check-up  Week.  Large  dis- 
tinctive lapel  buttons  to  be  worn  by 
servicemen  and  clerks  will  be  sent 
you.    An    instructive   book   will    be 


included  showing  how  to  sell  better 
antenna  installations. 

Other  tie-in  material  is  available, 
such  as  postcards  imprinted  with 
your  name,  ad  mats  for  use  in  your 
local  newspapers — everything  to  help 
vou  make  a  great  success  of  National 
Antenna  Check-up  Week. 

Write  for  complete  information — 
get  on  the  band  wagon  and  increase 
your  service  and  antenna  sales  during 
National  Antenna  Check-up  Week. 

Belden  Manufacturing  Company 

4613  W.  Van  Buren  Street 

Chicago,  Illinois 


Endorsed  by  Radio  Servicemen  of  America 


Belden 


The  Radio 
Wiring  Line 

Radio  Today 


REMEMBER. . . 


the  Easiest 


TUBE 


AS  the  peak  radio  months  approach,  more  and  more  dealers 
are  concentrating  on  Philco  Tubes.  Why?  Because  they  are 
The  Easiest  Tubes  in  the  World  to  Sell  .  .  .  this  fall,  as  always. 
Consider  these  facts: 

Approximately  ONE  out  of  every  FOUR  radios  in  use  today 
is  a  PHILCO  .  .  .  which  makes  a  total  of  FIFTY-FIVE  MILLION 
sockets  that  must  eventually  be  filled.  Naturally,  when  it  comes 
time  to  re-tube,  these  Philco  owners  Mill  want  and  demand  Philco 
Tubes ! 

But  that's  not  all.  Today,  more  than  ever,  PHILCO  is  the 
first  name  that  comes  to  mind  whenever  radio  is  mentioned.  And 
with  the  tremendous  interest  in  Mystery  Control,  the  name 
PHILCO  is  literally  on  every  tongue.  Which  means  that  millions 
of  owners  of  other  make  radios  will  swing  to  Philco  when  they 
buy  replacement  tubes. 

You.  too,  can  reap  the  profits  of  Philco  popularity  by  pushing 
Philco  Tubes  .  .  .  The  Easiest  Tubes  in  the  World  to  Sell! 


^N- 


\X 


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<8> 


'MLMM 


"'***■ 


T_L 


HARRY  BOYD  BROWN 

National  Merchandising 
Manager  o]  Philco 


No  Radio  Dealer 

Ever  Made  A  Dime 

Advertising  Low  Priced  Radios 


PHILCO  always  has  devoted  every  engineering  effort  and  every  mer- 
chandising and  advertising  effort — to  the  tune  of  millions  of  dollars — 
pushing  the  sale  of  higher  priced  quality  radios  so  that  the  retail  dealer 
and  everybody  else  connected  with  Philco  business  could  make  a  proper 
and  satisfactory  profit. 


Year  after  year — the  average  retail  selling  price  on  Philco  home  sets  in  the  United  States 
has  been  25/o  above  the  rest  of  the  radio  industry.  And  it  is  exactly  that  high  average 
Philco  selling  price  that  has  kept  thousands  of  radio  dealers  and  radio  departments  in 
business  and  in  the  black. 

No  retail  radio  dealer  ever  made  a  dime  advertising  low  priced  radio  merchandise — $10 
compact  radios  for  instance.  As  a  matter  of  fact,  spending  advertising  money  on  $10  com- 
pact radios  is  the  best  way  I  know  of  to  go  broke.  This  is  proven  with  a  little  arithmetic. 

As  an  illustration,  let  us  take  the  advertising  sum  of  $300.  Every  radio  dealer  knows 
that  if  he  spends  $300  in  newspaper  advertising  on  a  $10  compact  radio,  he  will  be  doing 
better  than  the  average  if  as  many  as  60  people  respond  by  calling  at  his  store. 

And  even  if  he  sells  them  all — this  means  an  advertising  cost  of  $5  for  each  retail  sale. 
The  dealer's  gross  profit  on  the  $10  compact  at  the  most  is  probably  $4.  At  that  rate,  his 
entire  gross  profit  on  the  60  sales  would  only  total  $240,  which  means  he  has  already  lost 
$60  without  even  considering  rent,  heat,  light,  investment  and  selling  commissions. 

And  even  assuming  that  the  dealer  does  some  selling-up — you  and  I  know  that  $9-95 
radio  prospects  are  not  often  sold-upj  beyond  $14.95.  And  even  if  enough  selling-up  is 
done  to  average  $5  gross  on  each  sale,  the  dealer  is  merely  breaking  even  on  the  advertis- 
ing cost.  All  other  expenses  certainly  put  him  well  in  the  red. 

On  the  other  hand — think  what  you  can  do  with  Philco  Mystery  Control  as  an  advertis- 
ing and  selling  weapon!  Now,  for  the  first  time  in  radio  history,  the  retail  dealer — on 
higher  priced  radios — has  an  advertising  story  of  tremendous  pulling  power — a  far  greater 
traffic-getter  than  any  low  priced  radio  compact  ever  could  be. 

"NO  WIRES!  NO  CORDS!  NO  PLUG-IN  CONNECTIONS  OF  ANY  KIND! 
AND  YET  PHILCO  MYSTERY  CONTROL  OPERATES  YOUR  RADIO  FROM 
ANY  ROOM  IN  YOUR  HOME."  In  those  opening  words  of  Philco  newspaper  copy, 
you  have  an  advertising  story  so  new  and  different — so  amazing  and  exciting — so  almost 
unbelievable  that  it  will  pack  your  store  with  people — with  interested  prospects. 

And  bear  in  mind — Philco  Mystery  Control  prospects  do  not  come  to  your  store  with 
$9.95  in  mind — or  with  '$1.00  down'  in  mind — or  with  a  big  trade-in  allowance  in  mind. 
They  do  not  come  looking  for  bargains.  They  come  instead  to  see  a  radio  invention  that 
is  fundamentally  and  vitally  new — exceedingly  desirable.  And  when  these  prospects  buy 
—  your  gross  profit  on  each  sale  is  15  to  20  times  as  much  as  on  a  $10  radio  compact. 


PHttC 


Radio  Today 


SEP  21  1938 


©en 


©CIB 

Staff— 

Darrell  Bartee 
G.  H.  Mayorga 

N.    McAllister 
M.    H.    Newton 
R.    Neubauer 
B.  V.    Spinetta 
Vinton   K.   Ulrich 


389853 


Orestes  H.  Caldwell 
Editor 

M.    Clements 
Publisher 


Vol.   IV,   No.   9 

Copyright    1938 


M.  E.  Herring 

Sales  Manager 

201  N.  Wells,  Chicago,  III. 


Member   Audit   Bureau   of    Circulations 


Caldwell-Clements,  Inc. 

Tel.    Plaza    3-1340 

480    Lexington    Ave. 

New   York,   N.   Y. 


A  PEACH  OF  A  PICK-UP 

Assorted  trends  are  right  now  com- 
bining themselves  to  make  a  flourish- 
ing Fall  for  radio  men.  Aside  from 
the  fact  that  general  business  is  bet- 
ter, there  are  the  November  elections 
to  think  of.  Not  to  mention  the  Au- 
tumn reopening  of  the  top  shows  on 
the  air,  the  beginning  of  the  football 
season  Sept.  24,  and  the  World  Series 
early  in  October. 

Among  the  opening  dates  for  inter- 
est-stirring broadcasts,  set  to  air  dur- 
ing the  coming  weeks: 


-Hollywood   Hotel— CBS 
-Ford   Sunday  Evening  Hour 
—CBS 

-Lux  Radio  Theater— CBS 
-Major  collegiate  football   be- 
gins 
-Bob  Hope — NBC  Red 
-Joe  Penner— CBS 
-Burns  and  Allen — CBS 
-Tommy  Riggs  and  Betty  Lou 
—NBC  Red 
-Prof.  Quiz— CBS 
-Jack  Benny  NBC  Red 
-International   Silver   Theater 
—CBS 

-Charles  Boyer — NBC  Blue 
-Eddie  Cantor— CBS 
-Fred  Allen— NBC  Red 
-Texaco    Star    Theater— CBS 
-Joe  E.  Brown— CBS 
-Metropolitan  Opera  Auditions 
—NBC  Blue 

-American  School  of  the  Air 
—CBS 

-Al  Pearce — NBC  Red 
-World  Series  opens 
-Jack  Haley— CBS 
-Arturo  Toscanini — NBC 
-Robert  Benchley— CBS 
-Metropolitan  Opera— NBC 


COMPACT  GUIDE  TO 
TRADE-IN  VALUES 

Readers  of  Radio  Today  are  making 
one  request  that  is  quite  simple :  They 
want  a  general  guide  to  trade-fin 
values,  simple  in  form  and  easy  to 
get  at.  The  demand  is  for  something 
else  besides  the  old-time  "black  books" 
— catalogs  covering  acres  of  page 
space  and  losing  themselves  in  their 
own  tiny  letters.  Salesmen  in  1938 
work  too  fast  for  the  dictionary  form ; 


Sept 

9- 

Sept 

11 

Sept 

12- 

Sept 

24- 

Sept 

27 

Sept 

29- 

Sept.  30- 

Oct. 

1- 

Oct. 

1- 

Oct. 

2- 

Oct. 

2- 

Oct. 

2- 

Oct. 

3- 

Oct. 

5- 

Oct. 

5- 

Oct. 

8- 

Oct. 

9- 

Oct. 

10- 

Oct. 

10- 

Oct. 

12 

Oct. 

14- 

Oct. 

15- 

Nov. 

20- 

Dec. 

3- 

MAKE  MORE  CALLS! 
USE  MORE  TACT! 

Walk  more  miles,  make  more  calls, 
Take  more  chances,  and  more  falls, 
Times  more  hard,  try  more  ways 
The  more  you  do  the  more  it  pays. 

Find  more  spots,  use  more  bait, 
Start  more  early,  stay  more  late, 
Try  more  schemes,  use  more  tact, 
The  more  you  do,  the  more  men  act. 

Talk  more  hope,  use  more  skill, 
Seek  more  prospects,  then  more   still, 
Smile  more  smiles,  spread  more  cheer — 
The  more  you  do,  the  more  you  hear. 

Think  more  thoughts,  more  intense, 
Give  more  reasons,  with  more  sense. 
Work  more  hours,  work  more  well — 
The  more  you  do,  the  more  you  sell. 


book-length     tabulations     are     bulky, 
heavy,  and  headache-producing. 

Elsewhere  in  this  issue,  Radio  To- 
day, therefore,  presents  a  convenient 
trade-in  value  chart,  instantly  helpful 
and  sharply  reduced  to  a  single  page. 
It's  a  straightforward  attempt  to  as- 
sist the  busy  salesman,  without  hand- 


ing him  a  mass  of  model  numbers 
which  he  is  supposed  to  locate  among 
the  wild  assortment  of  sets  being 
dragged  into  his  store. 

LONDON'S  "RADIOLYMPIA," 
FEATURES  TELEVISION 

London's  annual  radio  show,  "Ra- 
diolympia,"  held  August  24  to  Sep- 
tember 3,  had  only  half  as  many  ex- 
hibitors as  the  1937  show,  but  chief 
attention  was  centered  on  television. 
Twenty-one  manufacturers  exhibited 
television  sets,  and  the  exhibition  in- 
cluded 59  different  models  priced  from 
21  guineas  ($110)  up  to  250  guineas 
($1,300),  with  pictures  from  5  inches 
square  up  to  20  inches  square. 

The  radio  sets,  as  well  as  the  tele- 
vision sets,  were  in  operation  during 
the  show  from  a  common  source,  in 
contrast  to  the  mute  sets  in  American 
shows.  Observation  seemed  to  be  that 
the  British  public  "walked  right  by" 
all  radio  sets  but  stood  in  front  of 
television  sets !   This  continued  for  a 


TREND  IS  TO  "COMBINATIONS,"  TO  RAISE  UNIT  SALES  FOR  FALL 


&& 


With  all  the  leading  names  in  radio  now  featuring  "combinations"  in  their  lines, 

smart  retailers  are  laying  Fall  plans  as  reported  on  pages  34,  35,  etc.     Picture 

shows  novel  record  counter  at  Hudson-Ross,  Chicago. 


September,  1938 


With  radio  waves  heating  it  white-hot,  a  final  rivet  is  set  in  the  radio  building  at 
N.  Y.  World's  Fair.     Facing  exhibit-manager  J.  D'Agostino,  are  RCAM's  com- 
mercial   vice-president    H.    C.    Bonfig    and    general    manager    Robert    Shannon. 
NBC's  J.  de  J.  Almonte  holds  the  rivet  tool. 


full  week,  with  practically  no  change 
of  attitude  by  the  public. 

"By  the  law  of  averages,  all  this  ac- 
tivity of  the  newspapers  and  set  manu- 
facturers in  exhibiting  television  ac- 
companied by  so  much  publicity,  is 
going  to  sell  television ;  but  it  is  going 
to  retard  radio,"  was  a  radio  man's 
comment. 

Opinion  divided 

The  television  quality  was  generally 
very  good.  Naturally,  at  the  show  it 
was  mostly  film  reproduction.  A  good 
deal  of  the  curiosity  of  the  public 
seemed  not  so  much  interest  in  tele- 
vision as  interest  in  the  picture  itself. 
People  thought  they  were  at  a  cinema, 
not  really  examining  the  picture  from 
a    television    point    of    view.    Cricket 


New  chairman  of  the  Sales  Managers' 

Club,   western  group,  is  Eddie  Riedel, 

Raytheon's  general  sales  manager. 

10 


games  were  televised  from  the  field 
and  were  remarkably  good. 

Just  what  the  outcome  of  this  tele- 
vision activity  is  going  to  be  remains 
to  be  seen.  British  radio-set  manufac- 
turers are  about  equally  divided  as 
to  whether  they  should  push  television 
or  not,  and  the  division  is  severe 
enough  that  it  may  lead  to  a  break- 
down of  the  British  Radio  Manufac- 
turers Association.  Opposition  comes 
both  from  firms  who  are  making  and 
those  who  are  not  making  television 
sets.  Naturally  some  manufacturers 
are  making  it  for  their  own  protec- 
tion marketwise. 

At  present  England  has  only  one 
station  sending  out  a  programme,  and 
that  is  in  London.  The  picture  can 
be  received  nicely  up  to  about  30 
miles.  There  are  instances  of  greater 
distance  but  not  generally.  There 
is  talk  of  additional  stations  in  dif- 
ferent districts  outside  of  London,  but 
as  a  result  the  dealers  and  distributors 
in  those  territories  are  very  much  per- 
turbed about  their  fall  radio  business, 
feeling  positive  that  people  will  wait 
to  see  what  comes  out  of  television. 

RE  DYNAMIC  TESTING — 
WE  WOULDN'T  BRAG 

Heaped  high  on  a  desk  in  New 
York  City  are  dozens  of  letters  from 
servicemen. 

The  writers  are  saying  mostly  this : 
"We  are  interested  in  dynamic  test- 
ing of  radio  sets.  We  want  the  back 
articles  on  the  subject.  We  hope  you 
continue  the  material.  Will  the  arti- 
cles be  available  in  book  form?" 

Blanket  answer:  what  Radio  To- 
day started,  Radio  Today  will  appro- 


priately finish.  Right  now,  service  edi- 
tor Vinton  K.  Ulrich  is  in  his  lab, 
about  to  dynamic-test  another  re- 
ceiver with  one  hand,  tabulate  the 
results  with  another,  the  while  dic- 
tating replies  to  impatient  readers. 
Give  the  guy  time. 

The  rumpus  started  in  the  Febru- 
ary, 1938,  issue,  when  Mr.  Ulrich 
thought  of  the  new  method,  named  it, 
and  outlined  the  whole  business.  Since 
then  dynatesting  has  been  examined 
by  experts,  featured  by  manufactur- 
ers, cited  by  the  RSA,  recognized  by 
neighbor  magazines,  welcomed  by 
hundreds  of  servicers. 

Meanwhile,  Dynamic  Testing  (ser- 
vicing) headquarters  remain  suitably 
at  480  Lexington  Ave.,  New  York 
City,  where  a  good  deal  of  hard  work 
will  be  going  on  as  long  as  it's  of  any 
help  to  the  industry. 

BETTER  DAYTIME  DEMONSTRATION 
PROGRAMS  NEEDED- 

"My  thanks  go  to  Radio  Today  for 
its  interest  in  the  idea  of  better  day- 
time demonstration  periods  of  music 
on  the  air,"  says  Darse  E.  Todd,  radio 
buyer  for  the  Higbee  Company,  Cleve- 
land, Ohio. 

"Naturally  this  is  of  interest  to  me. 
And  because  of  the  undeniable  de- 
pendence of  each  and  every  branch  of 
the  radio  industry  on  every  other 
branch  of  that  industry,  it  would 
seem  to  me  that  this  subject  would 
be  of  vital  importance  to  radio  manu- 
facturers, distributors,  dealers,  broad- 
casting companies,  and  sponsors  of 
broadcast  programs. 

"Fitting  into  this  picture  ifrqm 
the  dealer's  standpoint  I  offer  the  fol- 
lowing observation  from  that  point 
of  view. 

"The  sales  resistance  of  the  cus- 
tomer is  reduced  to  a  minimum  when 
a  good  demonstrative  program  is  on 
the  air.  All  the  new  sets  sound  good. 
The  old  set  at  home  seems  poor  by 
comparison.  Picking  the  make  and 
model  is  all  that  has  to  be  done  to 
close  a  sale. 

Sales  spoiled 

"But  consider  what  is  much  more 
likely  to  happen.  The  prospective 
purchaser  of  a  new  radio  has  decided 
at  home  to  consider  the  selection  of  a 
new  model.  After  an  evening  of  listen- 
ing to  good  programs  on  the  old  and 
obsolete  set,  he  visits  a  radio  store 
or  radio  department,  expecting  to 
hear  better  music  and  entertainment 
than  he  usually  receives  on  his  old 
set.  The  salesman  by  whom  he  is 
being  served  may  he  of  the  very  high- 
est type,  alert,  painstaking,  intelli- 
gent, and  have  a  thorough  knowledge 


Radio  Today 


of  bis  merchandise.  But,  if  after 
stressing  the  tone  qualities  of  the 
new  sets,  he  is  forced  to  demonstrate 
this  tone  on  programs  carrying  vari- 
ous domestic  stories,  cooking  advice, 
or  others  equally  lacking  in  tone  pos- 
sibilities, the  customer  is  very  likely 
to  think  that  the  programs  he  heard 
the  evening  before  on  the  old  radio 
were  equally  as  good,  if  not  better. 

''This  is  certainly  making  the  least 
of  an  opportunity.  This  customer  had 
decided  to  purchase  a  new  radio,  went 
into  the  place  where  new  sets  are  sold, 
was  given  courteous  attention  by  a 
salesman  whose  very  livelihood  de- 
pends on  his  ability  to  make  sales, 
but  because  of  a  lack  of  proper  judg- 
ment somewhere  along  the  line  in  se- 
lecting programs,  the  customer's  de- 
sire to  own  a  new  radio  is  actually 
lessened  instead  of  increased. 

"My  hope  is  that  with  a  little  coax- 
ing on  the  part  of  some  of  us  who 
sell  radios,  the  sponsors  of  daytime 
programs  will  consider  more  seriously 
the  men  who  sell  radios,  the  men  who 
drive  and  listen  to  auto  radios,  the 
youngsters  who  are  at  home  almost 
as  much  as  the  mothers,  the  thou- 
sands of  shops,  hospitals,  gas  stations, 
restaurants,  and  other  places  of  busi- 
ness, where  a  little  more  music  might 
boost  the  sales  of  their  product  just 
as  much  as  the  programs  they  are  now 
directing  presumably  to  the  'stay-at- 
home'  housewife!" 


MORE  TUBE  TYPES; 
MORE  DEALER  HEADACHES 

+  After  exhausting  the  "single- 
letter"  tube  designation,  tube  and  set 
manufacturers  have  now  been  forced 
to  resort  to  type  numbers  containing 
two  identifying  letters.  Recent  ex- 
amples are  6AB5,  6AC5G,  and 
6ZT5G. 

Unfortunate  angle  is  that  the  radio 
dealer  must  stock  the  ever  increasing 
number  of  tubes  if  he  is  to  serve  his 
customers.  And  those  types  avail- 
able in  both  metal  and  glass  envelopes 
are  twice  as  much  of  a  problem.  From 
the  tube  manufacturers'  point  of 
view  the  picture  is  much  brighter, 
for  elements  in  some  of  the  newer 
octal  types  are  the  same  as  the  old 
glass  types.  But  dealer  gets  it  in  the 
neck  since  he  has  to  stock  the  same 
"guts"  with  two  different  base  ar- 
rangements. Now  we  hear  there  is  to 
be  a  new  series  called  "loctal." 

And  the  dealer  serving  farm  and 
power  line  areas  finds  it  necessary  to 
stock  additional  6-volt  tubes  that 
have  a  150  mil  filament  current  in- 
stead of  300,  otherwise  many  of  the 
types    are    almost     identical.       Then, 


Octave  Blake,  the  Cornell-Dubilier 
president,  a  new  director  of  the  RMA. 

there  is  the  2-volt  series  with 
octal  and  the  older  type  base.  And 
most  recently,  there  is  the  1.4  volt 
series  of  tubes. 

Perhaps  there  is  some  way '  of  in- 
troducing a  universal  type  of  replace- 
ment tubes  with  adapters  which  would 
make  one  tube  interchangeable  with 
several  others.  For  instance,  a  type 
6K7G  might  be  used  to  replace  a  type 
78  and  in  many  cases  a  6U7G  and 
6D6.  Or  sockets  might  be  changed 
in  the  older  sets.  In  this  way  one 
tube  would  replace  four  types  with 
no  major  differences  in  performance. 


STRIKING  IDEAS  FOR  SELLING 
EXTRA  RADIOS 

"It's  all  right  when  you  win  the 
argument,  but  it's  not  much  fun  to 
have  to  listen  to  a  Bach  Fugue  when 
you  were  sitting  with  bated  breath  to 
hear  what  happened  next  in  the  G- 
man's  chase  of  those  state-line  ban- 
dits!" 

This  is  one  of  the  ways  the  New 
Orleans  Public  Service,  Inc.,  appeals 
to  the  public  to  "see  your  favorite 
radio  dealer"  for  extra  radios  in  the 
home.  Other  sales  phrases  are  "If 
you're  only  a  living-room  listener, 
you  don't  know  what  you're  missing!" 
and  "There's  something  on  the  air  to 
enrich  every  hour  of  the  day — news, 
thrilling  drama,  contests,  folklore, 
comedy,  good  music,  household  hints." 

In  one  ad  used  in  the  campaign,  it 
says  "Do  your  tastes  dictate  what 
everyone  must  listen  to?"  and  sug- 
gests that  the  listener  "widen  the 
listening  range  of  your  home  with  an 
extra  radio."  The  broadcast  menu  is 
divided  into  15  parts  in  this  copy, 
showing  in  a  striking  way  how  a 
single  set  would  be  inadequate  to  keep 
a  family  happy.  These  parts  are  (1) 
For  thrill  hunters,  (2)  For  those  of 
mellow  years,  (3)  For  the  fair  ladies, 
(4)  Religion  on  the  air,  (5)  For 
sports  followers,  (6)  For  news  hounds, 
(7),  For  serial-drama  addicts,  (8) 
For  the  theater  fans,  (9)  For  music 
lovers,  (10)  Comedy  bound,  (11) 
For  song  fanciers,  (12)  For  twinkling- 
toes,  (13)  Appeal  to  reason,  (14)  For 
variety  searchers,  (15)  Children's  de- 
light. 


"It's  climate-sealed,"  explains  Frank  A.  D.  Andrea,  left,  to  the  African  explorers, 
Mr.  and  Mrs.  Armand  Denis,  who  dropped  in  to  discuss  their  next  radio  Safari. 


September,  1938 


11 


GO  OUT— AND  GET 

The  ABC  s  of  outside  selling  —  alphabetically  applied  to  radio. 


Action — the  hard-hitting,  persistent  kind  of  effort 
which  used  to  be  called  "over-selling",  is  now  OK.  It's 
no  secret  that  people  everywhere  are  trying  to  hoist 
themselves  out  of  a  depression,  and  the  buying  public 
does  its  share  by  giving  a  new  kind  of  welcome  to  pleas- 
ant salesmen.     Today  it  is  hard  to  overdo  the  sales  call. 

Business  men,  your  neighbors,  can  be  dragged  in  on 
radio  display  and  demonstration  if  your  merchandise  is 
non-competitive.  They  buy  sets  for  their  own  homes  or 
stores,  or  they  may  send  you  prospects  for  a  small  cut. 
And  they  cooperate  with  you  when  a  "Buy  In  Our  Town" 
campaign  comes   along. 

Colors  on  radio  receivers  are  a  "go"  signal  on  a  whole 
new  line  of  action.  Among  new  sets,  tricky  and  salable 
combinations  of  tints  have  appeared  in  de  luxe  designs. 
Here's  an  appeal  for  those  who  have  color-scheme  rooms, 
as  well  as  for  those  who  are  conscious  of  school  colors 
and  those  who  just  have  positive  preferences  in  the  matter 
of  color. 

Demonstration  for  the  whole  family,  in  the  place 
where  the  family  lives  and  does  its  listening,  is  a  key- 
note trick.  If  the  looks  and  the  performance  of  1939 
receivers  will  sell  themselves,  the  home  itself  is  the  best 
possible  spot  to  turn  on  a  new  radio  and  let  it  prove  its 
place  in  the  house. 

Entrance  into  prospects'  homes,  for  demonstrations, 
will  depend  upon  (1)  whether  you  are  willing  to  breeze 
around   after   business   hours,    (2)    what   impressions  you 


have  created  as  to  your  professional  methods  and  man- 
ners, and  (3)  whether  the  prospect  is  convinced  that  you 
offer  a  real  improvement  over  the  radio  equipment  already 
in  the  home. 

Files  of  prospect  names,  organized  and  up-to-the- 
minute,  will  eliminate  a  great  deal  of  cold  selling.  You'll 
get  openers  from  service  matters,  replacement  needs, 
holiday  requirements,  changes  of  address,  etc.  The  ar- 
rival at  your  store  of  special  types  of  new  merchandise 
will  often  be  reason  enough  for  an  approach  to  many  of 
the  names   in  the  file. 

Gift  models,  with  all  their  "personal  radio"  appeal, 
have  a  year  'round  use.  They  deserve  promotions  mainly 
at  Christmas,  Easter,  Mother's  Day  and  Father's  Day. 
But  birthdays,  graduations,  and  marriages  are  also  im- 
portant to  radio  sales. 

Handy  tuning,  developed  to  a  high  degree  and  at  a 
cost  of  millions,  represents  a  tangible  and  dramatic  as- 
pect to  today's  demonstrations  because  it  involves  get- 
ting the  prospect's  hand  on  the  buttons.  In  some  sales 
areas,  the  "push  button"  homes  are  the  only  ones  not 
regarded  as  hot  prospects. 

Instant  action  on  leads  from  the  service  department, 
the  utility,  jobber  salesmen,  old  customers,  newspapers, 
etc.,  is  today's  sales  plan.  Snappy  attention  to  new  pros- 
pects will  either  sell  them  or  get  them  off  your  lists. 
Prompt  calls  make  a  good  impression,  anyway. 

Junior  sets,  the  nifty  models  of  the  pee  wee  gang, 
are  a  cinch  to  carry  along  on  house-to-house  calls.  Dem- 
onstrated, they  seem  to  work  into  places  where  prospects 
originally  had  no  thought  of  using  a  radio. 

Kitchen  sets  are  pushovers  for  effective  demonstra- 
tions, to  housewives,  because  the  daytime  is  the  period 
when  the  likely  kitchen  broadcasts  are  coming.  House- 
holders are  able  to  see  a  neat  little  radio,  matching  their 
kitchen  colors,  producing  recipes  and  home-making  bints 
galore. 

Leads  from  chummy  customers  often  give  you  a 
chance  to  use  a  brand  of  "testimonial"  selling.  Dealers 
can  mention  that  "your  friend,  Mrs.  Jones,  is  now  en- 
joying a  home  demonstration  on  one  of  our  fine  radios. 
She's  in  on  the  'Sales  Mean  Jobs'  campaign  and  we  hope 
that  you  will  be,  too." 


This  Fall,  radio  dealers  are  turning  to  outside  selling,  to 
get  orders  for  consoles,  combinations,  table  models,  tubes, 
antennas,  and  service  repairs.  Every  day,  in  every  way,  they 
call  on  ten  new  prospects — or  ten  old  customers! 


Radio  Today 


nmmn 


THE  BUSINESS! 


Every  day  call  on  ten   new  prospects   and     Ask    em  to  buy. 


// 


Merchandising  help  from  the  manufacturers,  which 
is  always  the  work  of  experts  and  often  timed  for  sure- 
fire local  application,  will  frequently  stir  prospect  inter- 
est by  (1)  direct  mail  (2)  newspaper  blasts  (3)  colorful 
displays  (4)  national  advertising  (5)  network  or  spot 
broadcasting  (6)  prizes  for  your  salesmen  (7)  time  pay- 
ment conveniences  (8)  sales  ideas,  etc. 

National  Salesmen's  Crusade  should  be  the  dy- 
namic symbol  for  widespread  "invitations  to  buy."  To 
radio,  in  which  the  passive,  sit-at-home  brand  of  selling 
has  been  the  rule,  it  means  shoe-leather,  doorbell-pushing, 
hours  and  hours  of  fast  talking  to  everybody  in  town. 

Office  radios  can  be  tagged  "the  instruments  that 
give  you  market  news,  flashes  from  abroad,  and  financial 
reports  of  practical  value  to  everyday  business."  These 
sets  will  fit  under  your  arm  and  the  buyers  usually  pay 
cash. 

Programs  are  readily  divided  into  neat  lists  to  catch 
the  eye  of  any  type  of  prospect  you  call  on.  The  nature 
and  the  time  of  all  broadcasts  in  a  particular  area  are 
of  smash  importance  to  any  salesman  who  plans  to  tune 
a  set  for  a  prospect. 

Quick  follow-ups  on  local  pay-days,  re-employment  of 
local  workmen,  crop  harvests,  newcomers  to  town,  radio 
show  registrations,  leads  from  the  utility  company,  etc., 
will  give  dealers  an  extra  edge.  To  many  merchants, 
WPA  pay-days  are  a  signal  for  bargain  sales  on  traded-in 
merchandise. 

Records  turning  in  windows  or  playing  in  the  store 
have  netted  plenty  of  extra  sales  of  phonograph-radio 
combinations,  record-players,  or  the  discs  themselves.  To 
stir  the  already-stirred  appetite  for  recorded  music  means 
store  traffic,  protected  profits,  unexpected  sales  of  other 
lines. 

Surprise  styles  in  cabinets  are  glistening  plentifully 
among  1939  lines.  Tou  now  have  the  chance  to  sell  radios 
in  triangle  shape,  in  maple,  in  period  design,  in  easy- 
chair  style,  in  streamlines,  or  to  hang  on  the  wall. 

Trailers,  plastered  with  dealer  ads,  are  one  popular 
method  of  getting  your  merchandise  on  the  roll.  Sales 
crews  are  often  happier,  more  efficient  and  faster  if  you 
use  this  way  of  getting  receivers  into  the  residential  dis- 
tricts. 


College  and  high-school  students  make  a  special  select 
class  of  prospects  for  personal  radios.  Picture  shows  how 
Lyon  &  Healy,  Chicago,  featured  a  windowful  of  Stewart- 
Warner's  new  Varsity  models  in  college  colors. 


Utility  aspects  of  radio  cabinets  are  more  cunning 
than  ever.  Sets  are  today  combined  with  magazine  racks, 
book  shelves,  tables,  bars,  lamps,  easy  chairs,  pianos, 
clocks,  etc. 

Varsity  crowds  have  been  drawn  en  masse  into  the 
radio  market  because  (1)  sets  have  been  colored  and  let- 
tered for  them  (2)  their  favorite  dance  maestros  are 
regularly  on  the  air  (3)  they  crave  personal  access  to 
sports  broadcasts. 

Window  stunts,  to  fit  in  with  house-to-house  work, 
can  feature  the  catch  lines:  "The  Eadio  Parade  Is  Com- 
ing Your  Way",  "Want  To  Try  This  Eadio  Miracle?", 
"Leave  Your  Name  And  Address  For  A  Eadio  Surprise", 
"Our  Eadio  Man  Will  Come  Calling",  etc. 

Xtra  value  per  dollar  spent  for  new  radios  is  a  cinch 
to  dramatize,  when  you  list  and  demonstrate  the  features 
of  the  set  you  bring  into  the  home.  These  features  pile 
up  nicely  with  those  of  the  receiver  being  replacd.  Many 
dealers  choose  to  do  this  even  if  the  sale  is  already  made. 

Yields  from  consistent  house-calling  should  be  tabu- 
lated in  dramatic  form,  to  encourage  fellow  doorbell- 
pushers.  Not  in  sermon  form,  but  attractively  showing 
the  juicy  volume  done  in  the  action  spots. 

Zippers  have  earned  a  place  in  radio.  The  cases  for 
portable  radios,  designed  in  smart  luggage  style,  are  often 
the  most  displayable  items  which  can  get  across  the  port- 
able theme.  For  vacation  specials,  and  for  traveling  men 
the  year  'round. 


September,  1938 


TO  MOVE  MORE  MERCHANDISE 

Dealers  plan  promotions  for  a  promising  Fall 


DEALER  DRAMATIZES 
TONE  QUALITY 

One  of  the  new  aspects  of  radio 
selling  at  Jensen  Bros.,  Terre  Haute, 
Ind.,  is  brisk  demonstration  of  the 
ways  in  which  the  new  receivers  out- 
play the  older  sets.  G.  R.  Turner 
tries  to  keep  the  population  aware  of 
radio  reception  improvements. 

Sample  stunt  projected  by  Mr. 
Turner  outside  the  store  is  what  hap- 
pened at  the  local  Kiwanis  Club  re- 
cently. One  hundred  townspeople  at 
the  meeting  were  confronted  by  four 
consoles,  completely  shrouded.  The 
plan  was  to  play  them  for  blindfolded 
judges  and  select  the  one  with  the 
finest  tone. 

With  local  station  WBOW,  ar- 
rangements were  made  to  pick  up 
four  organ  solos  from  Radio  City, 
New  York.  These  selections  came 
through  the  receivers,  one  after  the 
other,  and  the  whole  business  was 
broadcast  over  WBOW. 

The  judges  selected  the  radio  make 
stocked  at  Jensen's,   and  Mr.   Turner 


dramatically  said  so  on  the  air.  The 
Kiwanis  crowd  thought  it  was  enter- 
tainment ;  the  radio  store  knew  it  was 
a  darned  good  ad. 

To  give  the  sales  presentations  an- 
other plus  quality,  Turner  is  talk- 
ing up  the  matter  of  good  aerials  for 
finer  reception.  In  many  cases,  the 
antenna  is  put  up  before  the  set  ar- 
rives at  the  prospect's  home. 

LETTERS  IN  WINDOW 

BRING  CUSTOMERS  INTO  STORE 

Everybody  likes  to  read  other 
people's  mail — and  genuine  testi- 
monial letters  are  a  potent  sales  force. 
Practical  application  of  these  two 
principles  brings  hundreds  of  new 
customers  every  year  to  Sico  Electric 
Radio  Co.,  258  Lexington  Avenue, 
New  York  City,  according  to  proprie- 
tor S.  S.  Cowen. 

Across  the  front  of  the  store's  one 
small  window  are  seven  picture 
frames — the  kind  you  can  buy  for  a 
quarter  or  less.  Within  each  frame  is 
a  letter — either  from  a  customer,  ex- 


Showing   prospects   how    tone    distortion    is    absorbed.      This    device    and   others 
will  feature  Stromberg-Carlson's  early  October  Labyrinth  Tone  Week. 


pressing  appreciation  of  a  service  job 
well  done;  or  from  a  manufacturer  to 
someone  in  the  neighborhood,  recom- 
mending the  store  as  a  reliable  radio 
repair  shop.  The  group  of  letters  is 
changed  constantly.  Those  displayed 
at  any  time  cover  the  most  common 
radio  ailments,  so  that  the  curious 
person  reading  can  match  some  com- 
plaint with  the  trouble  in  his  own 
set.  One  letter  may  refer  to  the  elim- 
ination of  interference,  another  to  the 
adjustment  of  an  old  receiver  so  that 
it  could  tune  the  1550  kc.  band,  a 
third  to  the  improved  tone  since  the 
Sico  serviceman's  call,  and  so  on. 

Folks  enter  the  store  almost  daily 
saying,  ''Can  you  fix  my  radio  like 
that  letter  in  the  window  says  you 
fixed  Mr.  Smith's?" 

The  picture  frames  are  also  used  to 
display  salesmaking  charts  or  pictures 
clipped  from  Radio  Today  and  other 
magazines.  Additional  frames  are 
hung  within  the  store.  "I  have  been 
displaying  letters  in  this  way  for 
years,"  says  Mr.  Cowen.  "They  are 
responsible  for  the  greatest  part,  of 
my  new-  business.  Feople  stop  to 
read  the  letters  who  never  would  be 
attracted  by  a  display  of  radios.  I 
have  watched  passersby  many  times : 
they  invariably  read  all  the  letters, 
and  then  their  eyes  travel  to  the  sets 
on  display." 

A  ROBOT  FOR  YOUR  WINDOWS 

A  traffic-stopping  idea  for  a  win- 
dow display,  which  requires  no  fixings 
except  the  merchandise  itself,  has 
been  worked  out  by  M.  Lehman  of 
Port-O-Matic  Corp.,  1019  Madison 
Ave.,  New  York  City. 

The  stunt  concerns  the  robot  door, 
which  is  a  regular  feature  attached 
to  the  side  of  the  portable  phono- 
graph-radios made  by  the  firm.  It 
flops  open  to  allow  records  to  be  re- 
leased automatically.  By  adjusting 
the  rejector  to  a  special  position  for 
display  purposes,  the  door  can  be 
made  to  move  back  and  forth  con- 
stantly. The  result  is  a  fascinating 
action  display. 

Records  cannot  be  actually  changed 
during  this  process,  but  with  some  of 
them  displayed  on  the  turntable,  and 
some  in  the  storage  tray,  the  purpose 
of  the  door's  movement  will  be  clear 
to  passersby. 


14 


Radio  Today 


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September,  1938 


15 


da 


CUSTOMERS  THAT  GOT  AWAY 

Confessions  of  a   radio   man  who  learned  his  lesson 


Offhand  we  might  think  of  all  ra- 
dio customers  as  variegated  nuts.  But, 
still,  they  are  customers,  and  bread- 
and-butter  for  us  radio  dealers.  It  is, 
of  course,  inevitable  that  a  percentage 
of  customers  will  slip  away  from  any 
dealer  or  serviceman.  Unfortunately, 
the  customer  seldom  tells  you  why  he 
discontinued  patronizing  you.  But  he 
does  tell  his  friends.   In  my  own  day 

1  have  pulled  boners  that  are  adequate 
examples  of  profound  stupidity  in 
dealing  with  customers.  I've  seen 
dealers  and  jobbers  put  my  humble 
blunders  to  shame  with  gross  insults 
to  customers  who  cost  good  money  to 
get  inside  the  front  door.  A  few  col- 
lected cases  may  prove  interesting 
and  instructive.  The  names  employed 
are  fictitious  but  the  incidents  are 
genuine. 

Real  McCoy 

Case  1.  Dennis  McCoy,  professor  of 
physics,  doctor  of  philosophy,  and  for 
seven  happy  years  my  Number  One 
buyer  of  radio  gadgets. 

"Mr.  Phillips,  there  is  a  bit  of  a 
barrel  tone  in  that  new  radio  you 
sold  me,  I  think  it  cuts  the  high  notes 
and  unnaturally  accentuates  the  lows. 
Could  you  fix  it?" 

I  laughed  and  led  him  over  to  the 
set  just  like  his,  next  to  the  front 
window  of  the  store.  Beaching  behind 
it,  I  loosened  the  reflector  back  of  the 
speaker  cone.  Instantly  the  tone  of 
the  receiver  changed.  "Do  you  like  it 
like  this?"  I  asked. 

"Splendid!"  The  poor  nut  was  jubi- 
lant. 

Back  to  its  original  position  went 
the  reflector.  "You  wouldn't  have 
the  radio  in  your  house  if  it  sounded 
like  that  all  the  time,"  I  opined. 

Dennis  McCoy  was  red-headed  and 
he  started  to  argue.   Blunder  number 

2  was  that  I  argued  with  him.  I  felt 
that  I  knew  him  well  enough  to  cau- 
tion him  against  a  mistake  which  he 
would  sooner  or  later  realize.  He 
hasn't  been  in  since,  and  that  was 
twelve  months  ago. 

Engineer  Martin 

Case  2.  George  Martin  was  an  en- 
gineer with  a  large  automobile  con- 
cern. I  had  sold  him  a  small  radio 
and  he  brought  it  in  for  repair.  My 
serviceman  is  a  young  genius.  With 
a  pair  of  headphones  and  a  few  tools, 


an  old  crystal  set  and  a  neon  bulb  he 
can  fix  any  radio  set  worth  fixing. 
Martin  stood  by  while  my  expert  did 
his  stuff.  I  should  have  seen  the 
meaning  of  the  gleam  in  Martin's  eye. 
My  boy  fixed  the  set  and  made  it  play 
as  good  as  new.  But  what  did  Martin 
do  but  take  it  right  across  the  street 
in  plain  sight  of  yours  truly  and  let 
that  dumb  cluck  they  have  as  a  ser- 
viceman apply  an  oscillograph,  two 
signal  generators,  a  vacuum-tube  volt- 
meter and  an  assortment  of  volt- 
meters and  all  the  junk  he  has  on  the 
service  bench  to  that  set.  Naturally 
my  competitor,  the  dirty  louse,  told 
Martin  a  tall  story  about  the  value 
of  all  those  gadgets  and  Martin  must 
have  fallen  for  it  because  he  doesn't 
come  in  any  more.  I  didn't  need  all 
kinds  of  test  equipment  because  I  had 
a  good  boy.  But  after  a  while  I  woke 
up  and  bought  everything  that  would 
look  flashy  on  the  bench.  I've  got 
other  customers  like  Martin  who 
might  go  high  hat  on  me. 

Motorman  Teets 

Case  3.  George  Teets,  Interurban 
motorman,  dresses  flashy,  slangy  in 
speech,  hands  invariably  greasy. 
George  dropped  in  while  I  was  selling 
the  cashier  of  our  bank  a  new  11-tube 
afc,  automatic  tuning  job.  After 
writing  up  the  order,  I  turned  to 
George.   "What'Il  you  have,   Teets?" 

"I  want  one  of  them  afc  sets, 
Charley — one  like  you  was  just  selling 
to  that  guy  from  the  bank." 

"You  don't  want  that  set,  George. 
It  costs  over  $200.  It  would  take  you 
two  years  to  pay  for  it  and  our  con- 
tracts only  run  nine  months."  I 
thought  I  was  doing  him  a  favor  to 


FOUR  MORALS 

Always  assume  the  customer  wants 
a  quality  better  than  I  think  he  can 
afford. 

Let  the  appearance  of  my  store  and 
especially  my  service  department  in- 
spire confidence  in  the  customers. 

Give  special  care  to  the  assorted 
nuts  who  want  something  special  to 
boast  about  on  their  radio. 

Quit  worrying  over  lost  customers 
but  worry  over  why  they  went  else- 
where. 


tell  him  that.  Yea,  that's  what  I 
thought. 

"To  hell  with  you,  big  stiff,  I'll  go 
across  the  street  and  get  me  one — for 
cash,  see!"  And  he  held  up  a  roll 
that  would  choke  a  cow.  "I  picked 
the  right  parlay  at  the  Washington 
track  yesterday  afternoon  and  I'm 
buying  the  best  radio  made,  before  I 
shoot  the  roll  on  some  other  nag."  I 
lost  a  cash  sale  and  the  customer. 

Lady  Gray 

Case  4.  Mrs.  Henrietta  Gray,  widow, 
living  frugally  at  the  edge  of  the 
town  on  an  old-age  pension.  Mrs. 
Gray  tried  my  competitor  first.  He 
knew  her  as  well  as  I  did.  He  offered 
her  a  $10.98  midget  set  she  didn't  like, 
then  a  $12.72  job  which  had  a  strange 
name,  than  a  $15.95  special  marked 
down  from  $24.50.  She  didn't  buy 
and  this  was  her  story. 

"He  thinks  he  can  pawn  off  his 
cheap  sets  on  me,  Henrietta  Gray.  I 
knew  his  mother  when  she  did  our 
washing.  He  thinks  I'm  cheap.  Why 
I've  been  saving  up  for  two  years  to- 
buy  a  good  radio,  and  I  want  to  see 
the  best  you  have,  Mr.  Phillips." 

If  she  had  visited  my  store  first,  I 
would  have  done  the  same  as  my  stu- 
pid competitor  across  the  street,  but 
as  I  have  always  said,  let  the  customer 
do  some  of  the  talking. 

Mrs.  Corf  wrigfif 

Case  5.  Mrs.  Belle  Cartwright,  leader  of 
society,  chairman  of  the  Community 
Fund  Drive,  one-time  candidate  for 
Congress  on  the  wrong  party  ticket,, 
and  nobody  to  be  sneezed  at.  She  used 
to  patronize  my  competitor  across  the- 
street.  This  day  she  sailed  into  my 
joint  with  both  eyes  popping  and  a* 
thin  upper  lip,  like  a  good,  high- 
spirited  horse  that  has  just  been  cut 
with  a  whip. 

"If  you  can  show  me  a  good  radio- 
without  asking  how  my  children  are, 
what  my  husband  is  doing  today,  or 
if  I've  recovered  from  my  auto  wreck,. 
I'll  write  you  a  check  for  it." 

"There  is  only  one  radio  in  my  store- 
in  keeping  with  your  lovely  home, 
Mrs.  Cartwright.  It  is  this  one  by 
the  window  at  $277.50,  complete  with 
a  new  aerial." 

"Excellent,  deliver  it  this  after- 
noon, please.  What  are  your  initials, 
Mr.  Phillips?  I'll  write  you  a  check 
immediately,  and  you're  lucky,  too, 
because  I  was  determined  to  buy  that 
set  in  the  window  across  the  street, 
until  that  jackanapes  thought  I  was 
making  a  social  call  on  him,  the  im- 
pertinent ass !" 

I  silently  agreed  with  her;  she  ex- 
pressed my  owr  thoughts  much  better 
than  I  could  have  done. 


16 


Radio  Today 


AUTUMN  ARRIVALS 

Novel    ideas    in    new    merchandise    for    Fall 


Admiral's  laydown  model  with  slide-rule  dial. 


Any  school   letter   or   any   combination  of  colors  is 
Stewart-Warner's  come-on   for  the  varsity  crowds. 


Philco's  Mystery  Control  has  a  workout  in  California  sunshine,  tuning  set   at  right. 


Sleek  new  remote-control  box  by  Stromberg-Carlson. 


A  self-powered  Philco  draws  street  crowds  in  Syracuse,  N.  Y. 


Metropolitan  model, 
Stewart- Warner. 


September,  1938 


I 


Motorola  "time-tuning"  pleases 
Washington  jobbers. 

17 


...IN  PRICE..! 


NEW  1939  ADMIRAL  CONSOLES 
7,8&11  TUBE  SUPERHETERODYNES 


36  Models  to   Choose  From! 

4  to  16  Tubes — See  Your 

Jobber  or  Write  Us 


Model  124-5E— walnut-)  Pri 
Model  125-5E— Ivory  J-  | 
Model  126-5E— Red      J  "l. 


Left  Model  137-8G,  7  tube  A.C. 
Console  with  permeability  tuning.  In- 
cludes 3-gang  condenser  .  .  .  new 
electric  eye  .  .  .  large,  easy-to-read  slide 
rule  dial  .  .  .  push  button  tone  control  .  .  . 
full  A.V.C.  .  .  .  heavy  duty  dynamic 
speaker.  Three  bands  cover  American 
broadcast  and  foreign  stations,  police, 
amateur,  aviation,  ships  at  sea. 

Right— Model  139-11A.  A.C.  Super- 
het  Console  Grand  with  tilt-tuning  dial 
.  .  .  electric  automatic  tuning  .  .  .  gold 
calibrated  slide  rule  dial  .  .  .  push  button 
off-on  switch  .  .  .  push  button  operated 
tone  control  plus  manual  base  com- 
pensation to  give  42  tone  variations. 
Has  10  watts  output  .  .  .  full  A.V.C.  .  .  . 
AFC  .  .  .  pre-selector  .  .  .  12"  electro 
dynamic  speaker  ...  3  bands.  Tunes 
American  broadcast  and  foreign  stations, 
police,     amateur,     aviation,    ships-at-sea. 

BATTERY   RADIO 

With  Sensational  T^lew  lViVoit  Tubes 

Model  141-4A,  4-tube  Superhet  Table 
Radio  operates  for  almost  a  year  from 
one  "AB"  battery.  Single  plug-in  con- 
nection does  away  with  messy  wires. 
New  superhet  circuit  gives  6-tube  per- 
formance. Tuning  range  535  to  1735  KC. 
Tunes  American  broadcast  and  police 
stations.  Has  slide  rule  dial  .  .  .  full 
A.V.C.  ...  6"  P.M.  dynamic  speaker. 


CONTINENTAL  RADIO  &  TELEVISION  CORP.,  3800  W.  Cortland  St.,  Chicajj 

18  Radio  Today 


/ 

r 


--*jjg^r-v^  .v^-'.-^ 


^>-;  -  £3^ 


JRFORA1ANCE. . .  DESIGN 

Meet  "Price  Competition"  with  the  Little  Admiral 
A    Full   5-Tube   AC-DC   Super   as   Low  as   $9.95 

You  can  depend  on  .Admiral  to  keep  one  step  ahead  of  the  parade  .  .  . 
in  price  .  .  .  performance  .  .  .  design.  Here's  a  new  5-tube  super  that 
will  help  you  get  your  share  of  the  midget  radio  business.  Has  5  work- 
ing RCfl  metal  tubes  in  improved  superhet  circuit  to  give  7  tube  per- 
formance .  .  .  automatic  volume  control  .  .  .  pilot  light  .  .  .  range  535  to 
1735  KC.  Modern  one-piece  molded  plastic  cabinet  available  in  four 
attractive   colors. 


NEW  ADMIRAL  8-TUBE 
AC  TABLE  RADIO  for  1939 

Model  134-8A.  8-Tube  A.C.  Superhet  Table 

Radio.  Has  push  button  off-on  switch  .  .  .  auto- 
matic push  button  tuning  .  .  .  continuously  varia- 
ble tone  control  ...  full  fl.V.C.  .  .  .  and  8" 
electro  dynamic  speaker.  Three  bands.  Tunes 
American  broadcast  and  foreign  stations,  police, 
amateur,  aviation,  ships-at-sea.  The  biggest  buy 
in  8-tube  AC  table  radios  today! 


ove — Model  142-8A  Radio-Phonogiaph  Console.  8-tube  AC 
perhet  radio  with  permeability  push  button  tuning.  Has  large,  easy-to- 
ad slide  rule  dial  .  .  .  continuously  variable  tone  control  .  .  .  full  il.V.C. 
.  .  extra  heavy  electro  dynamic  speaker.  Three  bands.  Tunes  American 
roadcast  and  foreign  stations,  police,  amateur,  aviation  and  ships-at- 
ea.  Phonograph  includes  automatic  record  changer  which  plays  10"  or 
2"  records  automatically  in  mixed  sequence.  Has  top  loading  crystal 
ickup  with  automatic  needle  cup  and  triple  sealed  crystal  cartridge. 


Above— Model  520-5C  5  Tube  (in- 
cluding ballast)  T.R.F.  Radio- 
Phonograph.  Has  5"  electro  dynamic 
speaker  ...  2  watts  output  ...  1  stage 
R.F.  Tunes  American  broadcast  and 
police  stations  (535  to  1735  KC  range). 
Phonograph  has  new  light  weight 
crystal  pickup  ...  78  R.P.M.  quiet 
electric  motor  .  .  .  plays  up  to  12" 
ds. 


Model    520-5F    Table    Radio-Phono- 

graph.  5-tube  AC  superhet  radio  with 
tuning  range  535  to  1735  K.C  Has  5" 
electro  dynamic  speaker.  Phonograph 
and  cabinet  same  as  model  520-5C 
above.  Underwriters  approved. 


Left—Model  521-5C  5  tube  (includ- 
ing   ballast)     T.R.F.     Eadio-Phono- 

graph  with  5"  electro  dynamic  speaker 
...  2  watts  output  .  .  .  one  stage  R.F.  .  .  . 
tuning  range  535  to  1735  KC  Tunes 
American  broadcast  and  police  stations. 
Phonograph  has  new  light  weight  crystal 
pickup  and  78  R.P.M. quiet  electric  motor. 
Plays  up  to  12"  records  with  top  closed. 

Model  S21-5F  A.C.  Superhet  Table 
Radio-Phonograph.  5-tube  110  volt 
radio  with  tuning  range  535  to  1735 
KC  Has  5"  electro  dynamic  speaker. 
Phonograph  and  cabinet  same  as  Model 
521-5C.  Underwriters  approved. 


September,  1938 


19 


$MlbtjmkaLV0 


NEW  1939  ADMIRAL  CONSOLES 
7,8&11  TUBE  SUPERHETERODYNES 


36  Models  to   Choose  from! 

4  to  16  Tubes — See  Your 

Jobber  or  Write  Us 


Model  124-5E— wabuf)  Fried 
Model  12S-SE— Ivory  }  ll 
Model  126-SE— Red     JSM 


...IN  PRICE... PERFORMANCE . . . DESIGN 

Meet  "Price  Competition"  with  the  Little  Admiral 
A   Full  S-Tube   AC-DC  Super  as  Low  as  $9.95 

You  can  depend  on  ildmiral  to  keep  one  step  ahead  of  the  parade 
in  price  .  .  .  performance  .  .  .  design.  Here's  a  new  5-tube  super  that 
will  help  you  get  your  share  of  the  midget  radio  business.  Has  5  work- 
ing RCfl  metal  tubes  in  improved  superhet  circuit  to  give  7  tube  per- 
formance .  .  .  automatic  volume  control  .  .  .  pilot  light  .  .  .  range  535  to 
1735  KC.  Modern  one-piece  molded  plastic  cabinet  available  in  four 
attractive  colors. 


NEW   1939   ADMIRAL    RADIO-PHONOGRAPHS 


NEW  ADMIRAL  8-TUBE 
AC  TABLE  RADIO  for  1939 

Model  134-8A.  8-Tube  A.C.  Superhet  Table 

Radio.  Has  push  button  off-on  switch  .  .  .  auto- 
matic push  button  tuning  .  .  .  continuously  varia- 
ble tone  control  .  .  .  full  fl.V.C.  .  .  .  and  8" 
electro  dynamic  speaker.  Three  bands.  Tunes 
American  broadcast  and  foreign  stations,  police, 
amateur,  aviation,  ships-at-sea.  The  biggest  buy 
in  8-tube  AC  table  radios  today! 


Left— Model  137-8G,  7  tube  A.C. 
Console  with  permeability  tuning.  In- 
cludes 3-gang  condenser  .  .  .  new 
electric  eye  ,  .  .  large,  easy-to-read  slide 
rule  dial  .  .  .  push  button  tone  control .  .  . 
full  fl.V.C.  .  .  .  heavy  duty  dynamic 
speaker.  Three  bands  cover  American 
broadcast  and  foreign  stations,  police, 
amateur,  aviation,  ships  at  sea. 

Right— Model  139-11A.  A.C.  Super- 
het Console  Grand  with  tilt-tuning  dial 
.  .  .  electric  automatic  tuning  .  .  .  gold 
calibrated  slide  rule  dial  .  .  .  push  button 
off-on  switch  .  .  .  push  button  operated 
tone  control  plus  manual  base  com- 
pensation to  give  42  tone  variations. 
Has  10  watts  output  ...  full  fl.V.C.  .  .  . 
RFC  .  .  .  pre-selector  .  .  .  12"  electro 
dynamic  speaker  ...  3  bands.  Tunes 
American  broadcast  and  foreign  stations, 
police,    amateur,    aviation,    ships-at-sea. 

BATTERY   RADIO 

With  Sensational  Tvjeu)  iy2  Volt  Tubes 
Model  141-4A,  4-lube  Superhet  Table 
Radio  opeiates  for  almost  a  year  from 
one  "flB"  battery.  Single  plug-in  con- 
nection does  away  with  messy  wires. 
New  superhet  circuit  gives  6-tube  per- 
formance. Tuning  range  S3S  to  1735  KC. 
Tunes  American  broadcast  and  police 
stations.  Has  slide  rule  dial  .  .  .  full 
fl.V.C.  ...  6"  P.M.  dynamic  speaker. 


CONTINENTAL  RADIO  &  TELEVISION  CORP.,  3800  W.  Cortland  St.,  Chicago 


18 


Radio  Today 


f^0V|fTModel  142"8A  Radio-Phonoaiaph  Console.  8-tube  AC 
rZTvl Iadi°  with  Permeability  push  button  tuning.  Has  large,  easy-to- 
™ad  slide  ru»  Hi,>l         u '5 :_ui-. ™i.„l        full  fl.V.C. 


.  .  .  continuously  variable  tone  control  .  .  .  full  R.v.C. 
--■        heavy  electro  dynamic  speake     " 


Three  bands.  Tunes  American 


broU       >    eavV  electro  dynamic  spbou..     >«...-.     ~ 

sea  Pk       and  f°rei9n  stations,  police,  amateur,  aviation  and  ships-at 
«.  monograph  includes  automatic  record  changer  which  plays  10    or 
Di  .  'ecords  automatically  in  mixed  sequence.  Has  top  loading  crystal 
v  cnup  with  automatic  needle  cup  and  triple  sealed  crystal  cartridge. 

September,  1938 


1735  KC  range) 

light     weight 

78    R.P.M.    quiet 

plays    up    to    12" 


Model  520-SF  Tabic  Radio  Phono 
graph.  5-tube  AC  superhet  radio  with 
tuning  range  535  to  1735  KC.  Has  5" 
electro  dynamic  speaker.  Phonograph 
and  cabinet  same  as  model  520-5C 
above.  Underwriters  approved. 

Left— Model  52I-5C  5  tube  {Includ- 
ing ballast)  T.R.r.  Radio-Phono- 
graph with  5"  electro  dynamic  speaker 
.  2  watts  output  .  .  .  one  stage  H  F.  .  .  . 
tuning  range  535  to  1735  KC.  Tui 
American  broadcast  andpolici 
Phonograph  has  new  light  weight  crystal 
pickup  and  78  H.P.M.quiet  electric  motor. 
Plays  up  to  12"  records  with  top  closed. 

Model  521-SF  A.C.  Supexhet  Table 
Radio-Phonograph.  5-tube  110  volt 
radio  with  tuning  range  535  to  1735 
KC.  Has  5"  electro  dynamic  speaker. 
Phonograph  and  cabinet  same  as  Model 
521-5C.  Underwriters  approved. 


19 


More  Power  to^bur  Sales! 

In  three  vital  directions 
RCA  serves  the  men  who  sell  radio 


o 


jM 


Shown  above  is  the  extremely  popular  1939  RCA  Victor  Radio  Mode]  97KG 
in  the  new  Console  Grand  cabinet,  price  $85    (f.o.b.  Camden,  New  Jersey), 


^essaog  te   '  •    fart"iif  u,;,l     ad'° 
h*°  cons,      ;'Ces>  RCA         radio 

P,.  y  broad. 

fcr°arfcacr,  fsu*ilv    th        '0ne 

t,  "Proved  "  c°ntinu. 

liver,  J**"  RCA     *        ***»■ 

T  ^  R*diosthThe  1(>39R£t 


Radio  Corporation  of  America 

RADIO  CITY,  N.  Y. 

RCA  MANUFACTURING  CO.,  INC.  RCA  INSTITUTES,  INC.         RCA  COMMUNICATIONS,  INC. 

RADIOMARINE  CORPORATION  OF  AMERICA  NATIONAL  BROADCASTING  COMPANY 


20 


Radio  Today 


GET  SETS  READY  FOR  WINTER 

Clear  up   interference    sources,    replace    tubes 
National  Antenna  Check-up  Week,  Oct.  15-22 


Some  forty  million  radio  sets  in 
this  U.S.A.  need  to  be  gotten  ready 
for  broadcasting's  biggest  season, 
which  starts  this  month.  With  new 
features — music,  drama,  comedy,  news 
and  information — crowding  the  air- 
ways, this  is  the  time  to  see  that 
every  listener  has  his  set  "in  A  No. 
1  condition,"  with  fresh  tubes  in- 
stalled, defective  parts  replaced,  proper 
antennas  installed,  and  all  interfer- 
ence eliminated  from  local  reception. 

Here's  work  for  every  radio  man 
and  his  service  helpers,  to  get  all  the 
radios  in  his  neighborhood  in  shape 
to  bring  in  radio's  brilliant  winter 
programs  with  maximum  clarity  and 
free  of  annoying  interference.  Thou- 
sands of  tube  sockets  cry  out  for  re- 
placement tubes,  to  restore  the  sets 
to  their  pristine  clarity  and  sensi- 
tivity. Volume  controls  that  have 
gotten  noisy,  need  to  be  renewed.  Con- 
densers and  transformers  may  need  to 
be  replaced. 

Filter  out  interference 

And  the  owner's  full  enjoyment 
may  be  prevented  because  of  some 
electrical  interference  in  his  own 
home  or  in  some  neighboring  premises, 
which  could  be  promptly  eliminated 
by  means  of  one  of  the  simple  plug-in 
filters  now  available.  Too  many  lis- 
teners go  on  month  after  month,  suf- 
fering interference  and  enduring  it, 
all  because  some  radio  man  has  not 
demonstrated  how  simply  and  inex- 
pensively such  noise  can  be  prevented. 

Of  course,  it  is  in  the  antennas  of 
the  nation,  that  greatest  improvement 
might  be  made  in  radio  reception. 
For  no  radio,  however  costly,  can  be 
any  better  than  its  antenna.  The  elec- 
tro-magnetic waves  in  the  ether  must 
first  be  picked  up,  before  they  can  be 
amplified  in  the  radio  set.  And  so 
"fixing  the  antenna"  gets  back  to  first 
principles.  For  all  radio  listening 
starts  with  the  listener's  antenna. 

To  tell  the  public 

It  is  appropriate  therefore  that  a 
National  Radio  Antenna  Check-up 
Week  is  scheduled  for  Oct.  15  to  22, 
to  remind  the  general  public  of  the 
importance  of  getting  their  antenna 
installations    overhauled    or    replaced 


with  modern  scientific  antennas.  Spon- 
sored by  the  Belden  Manufacturing 
Company,  which  will  publish  full-page 
announcements  in  the  Saturday  Eve- 
ning Post,  Collier's,  and  other  maga- 
zines, prior  to  the  period,  National 
Antenna  Check-up  Week  is  expected 
to  result  in  improved  reception  for 
millions  of  listeners,  and  to  produce 
valuable  earnings  for  thousands  of 
service  men.  To  50,000  radio  men 
Belden  will  also  mail  out  window  ban- 
ners, lapel  buttons,  and  instruction 
books  to  aid  in  selling  modern  anten- 
nas for  replacing  old  installations. 

Clear  channel  reception 

For  many  new  and  important  de- 
velopments have  been  made  in  an- 
tenna design  in  recent  years  and 
even  months.  -A  review  of  some  of 
these  new  outside  antenna  features 
will  be  of  interest  to  radio  readers, 
bringing  them  up-to-date  on  the  new 
improvements  now   available. 

Clear  channel  reception  is  featured 
in  the  new  Belden  all-wave  antenna 
system  which  provides  uniform  sig- 
nals from  400  to  22,000  kilocycles. 
The  transmission  line  is  unusual  in 
that    two    conductors    with    an    outer 


shield  are  used,  the  shield  being  a 
common  conductor.  On  short  waves 
one  conductor  is  employed  with  the 
grounded  outer  shield,  while  on  the 
broadcast  band  the  other  conductor 
is  used  with  the  grounded  shield. 

Separate  antenna  and  set  coupling 
transformers  are  provided  for  high 
and  low  frequencies,  so  that  each 
channel  can  work  at  maximum  effi- 
ciency. The  circuit  with  iron-core 
couplers  provides  60  per  cent  more 
efficiency  than  conventional  systems, 
and  is  shown  in  the  accompanying 
illustration.  System  will  operate  up 
to  four  receivers  with  little  loss  in 
signal  strength. 

Cancels  noise 

Another  new  antenna  is  the  BCA- 
Victor  "Master"  for  use  in  private 
homes.  In  addition  to  the  usual 
doublet  with  its  double-wire  trans- 
mission line,  the  antenna  uses  a  coun- 
terpoise placed  parallel  to  the  trans- 
mission line,  but  slightly  shorter  than 
the  line,  (see  accompanying  diagram). 

Outstanding  feature  is  that  the 
counterpoise  on  the  broadcast  band 
picks  up  "noise"  which  is  fed  into 
an     adjustable     set     coupling     trans- 


To  open  up  profitable  antenna-installation  jobs  for  servicemen,  Belden  Mfg.  Co.  is 
sponsoring  National  Antenna  Week  next  month,  and  will  publicize  it  to  millions  of 

radio  owners. 


September,  1938 


21 


L^3.W.„  Flu  Top  Am.™. 


Rtcihtr 
iCo.pl.n 

C&TToooJl) 


Schematic  of  the  Clear  Channel  an- 
tenna system  showing  use  of  separate 
facilities    for    long    and    short    waves. 


former  where  it  cancels  out  noise 
picked  up  by  the  flat  top  or  doublet. 
Thus,  claims  the  manufacturer,  the 
antenna  flat-top  can  be  quickly  erected 
without  the  need  of  finding-  a  "quiet'' 
location  on  the  roof.  On  the  short- 
waves  this  antenna  performs  as  the 
usual  doublet-type  of  antenna,  with 
noise  reducing  properties. 

Doublets 

A  still  popular  type  of  antenna  is 
the  conventional  doublet  which  in 
the  past  few  years  has  been  much 
featured  for  short-wave  reception. 
These  doublet  antennas  are  found  in 
many  forms  and  available  from  all 
manufacturers.  Doublets  are  manu- 
factured with  self-selecting  matching 
transformers  which  automatically  op- 
erate at  all  frequencies.  Other  doub- 
lets require  the  operation  of  a  change- 
over switch  when  going  from  the 
broadcast  band  to  short  waves.  Then, 


too,  some  of  the  radio  sets  are  equipped 
with  built-in  matching  transformers 
and  change-over  switches  which  op- 
erate from  the  receiver  wave-change 
switch. 

Doublets  are  made  with  both  equal 
and  unequal  legs  on  the  flat  top.  Equal 
legs  give  balanced  operation  on  short- 
waves,  with  an  additional  reduction 
in  noise.  Unequal  doublets  give  more 
uniform  response  over  a  large  band 
of  frequencies  as  well  as  stronger 
signal  strength  on  the  broadcast  band. 

Some  of  the  all-wave  antenna  sys- 
tems provided  for  noise  reduction  on 
the  shortwaves  only,  so  that  the  an- 
tenna works  similar  to  an  ordinary 
wire  and  lead-in  on  the  broadcast 
band. 

Magic  wave;  faeomoscope 

The  RCA  magic  wave  antenna  is  a 
noise-reducing  transmission  line  with 
matching  transformers  that  can  be 
operated  with  any  length  of  antenna 
or  vertical  rod.  With  suitable  match- 
ing or  coupling  transformers,  this  an- 
tenna will  operate  tip  to  16  receivers, 
though  primarily  designed  for  a  single 
radio  set. 

Another  important  antenna  devel- 
opment is  G-E's  beamascope.  This 
is  an  electrostatically-shielded  loop 
built  into  certain  G-E  models  that 
provides  for  noise  reduction  on  the 
broadcast  band.  However,  for  short 
waves  a  "standard"  antenna  is  needed. 

Especially  effective  in  certain  in- 
stallations are  the  double  -  doublet, 
spider-web  doublet,  tuned  doublets, 
antennas  with  open-wire  feeders.  Gen- 
erally, these  antennas  either  require 
too  much  space  or  cost  too  much  for 
ordinary  installations. 


^SS?^ 


CLEAT 
INSULATOR. 


COUPLING 
UNIT 


For  noise-free  broadcast  reception  the  RCA  Master  aerial  system  uses  a  counter- 
poise to  pick  up  an  opposing  noise  to  cancel  the  noise  picked  up  by  the  antenna 

itself. 


RSA  PRESENTS  48  CHARTERS 

The  National  Office  ot  the  RSA, 
on  behalf  of  the  Board  of  Directors, 
takes  great  pleasure  in  announcing 
that  charters  have  been  approved 
for  every  one  of  our  forty-eight 
chapters  as  of  record  August  1, 
1938.  These  charters  will  be  pre- 
sented personally  by  the  Executive 
Secretary  in  every  case  possible  as 
rapidly  as  necessary  details  can  be 
arranged.  RSA  feels  that  this  meas- 
ures a  milestone  in  the  progress  of 
the  Radio  Servicemen  of  America, 
and  definitely  assures  the  future 
welfare  of  its  members. 

National  headquarters  announces 
the  formation  and  affiliation  of  new 
RSA  groups  in  Tulsa,  Okla.,  and  St. 
Paul,  Minn.  Several  other  groups 
are  carrying  out  the  necessary  pre- 
liminary steps  to  affiliate  with  RSA. 
A  chapter  of  the  RSA  in  Holland  has 
been  established  under  the  direction 
of  Mr.  A.  F.  L.  de  Quant,  Secretary 
of  the  Netherland  Radio  Service 
Association.  Applications  are  pend- 
ing from  Sweden,  Ireland,  and 
Switzerland. 


RADIOS  IN  SCHOOL 
COLORS— "VARSITY" 

One  of  the  most  unique  and  far 
reaching  merchandising  ideas  to  hit 
the  radio  industry  has  just  been  an- 
nounced by  Stewart-Warner  with  the 
introduction  of  a  new  radio  known  as 
"Varsity." 

This  radio  has  been  designed  to 
"show-your-colors"  loyalty  of  under- 
graduates and  alumni  of  schools 
throughout  the  country.  It  is  avail- 
able in  the  actual  and  authentic  color 
combination  of  a  college  or  university. 
As  an  example:  The  Northwestern 
model  is  a  purple  cabinet  with  white 
tuning  and  volume  knobs,  push-buttons, 
speaker  grill  and  screen.  The  school 
letter  "N"  is  purple  and  mounted  on 
the  white  grill. 

The  idea  has  been  carefully  tested 
out  in  the  central  west  states  and  the 
possibilities  of  merchandising  a  school 
radio,  in  school  colors,  was  quickly 
grasped  by  dealers  everywhere.  In 
Chicago,  Lyon  &  Healy,  one  of  the 
foremost  musical  stores  in  the  country, 
devoted  a  full  boulevard  window  to 
display  the  complete  line  of  Big  Ten 
school  models,  plus  several  other 
schools. 

The  factory  is  in  full  production  and 
shipments  are  being  made  to  territories 
representing  91  major  colleges  and  uni- 
versities all  over  the  United  States, 
according  to  L.  L.  Kelsey,  radio  man- 
ager. In  addition  to  those  schools  for 
which  models  are  already  available, 
Stewart-Warner  is  adding  new  color 
combinations  daily,  and  eventually  will 
include  prep,  high  and  military  schools. 

The  vivid  color  combinations  of  the 
Varsity  model  are  baked  on  a  Bakelite 
cabinet  which  houses  a  five-tube  (in- 
cluding ballast)  superheterodyne  chas- 
sis. Four  push-buttons  are  provided 
for  automatic  tuning  and  there  is  a 
manual  control  as  well.  The  speaker 
is  a  full  five-inch  dynamic  and  the  set 
operates  AC  or  DC  with  a  tuning  range 
of  from  540  to  1,720  kc. 


22 


Radio  Today 


EVERY  RACE  TRACK  AND  FAIR  GROUNDS  NEEDS  SOUND 


FALL  ELECTIONS 
WILL  HIKE  PA  SALES 

Already,  the  hundreds  of  candidates 
who  are  involved  in  the  Fall  elections 
are  touring  the  country  and,  via  pub- 
lic address,  are  asking  voters  to  sup- 
port them. 

Political  campaigns  this  year  are 
exceptionally  lively,  due  to  the  intense 
interest  in  President  Roosevelt's 
"pui'ge"  activities.  Many  extra 
speeches  will  need  to  be  made,  and 
many  extra  political  meetings  will  be 
held  bj-  both  parties.  All  this  means 
a  nice  pickup  in  the  demand  for  voice 
amplification. 

Campaign  committees  now  have  a 
more  formal  organization  than  was 
present  in  the  primaries  —  they're 
easier  to  reach  and  they're  better  pay. 
Sound  men  thus  find  their  sales 
chances   considerably   improved. 

The  weather  is  still  generally  OK 
for  outdoor  political  gatherings;  later 
on  the  demand  will  be  for  indoor  in- 
stallations. Throughout  it  all,  the 
sound  trucks  which  do  street  work 
will  have  more  prospects. 


TO  SELL  SOUND, 
WITH  DEALERS 


COOPERATE 


"We  operate  on  a  strictly  wholesale 
basis  and  cooperate  with  the  dealer  to 
the  fullest  extent,"  comments  W.  D. 
Jenkins,  Radio  Supply  Co.,  Xorfolk, 
Va.  "We  supply  to  our  dealers  for 
demonstration  purposes  only,  sound 
equipment  and  inter-communication 
systems.  We  insist  that  such  equip- 
ment be  used  only  for  demonstration 
purposes  and  we  check  very  carefully 
to  see  that  no  rentals  are  received  on 
such  demonstrations. 

"We  believe  that  by  working  with 
the  dealer,  we  can  secure  more  busi- 
ness on  sound  equipment.  By  refrain- 
ing from  promoting  the  sale  of  the 
equipment  direct  to  consumers  or  hav- 
ing a  separate  sales  division  to  handle 
retail  sound,  we  do  not  antagonize  the 
dealer  and  thus  possibly  lose  a  portion 
of  the  sound  business  along  with  the 
other  business  which  we  would  norm- 
ally receive  from  the  dealer. 

"This  is  a  point  which  we  believe  is 
very  important,"'  emphasizes  Mr. 
Jenkins.  "As  time  goes  on  more  of 
our  dealers  will  become  interested  in 
the  sale  of  sound  equipment  and  if  we 
are  a  strong  competitor  of  theirs,  nat- 
urally they  would  not  be  inclined  to 


Roosevelt    Raceway's    25-watt    University    Lab    speakers,    at    Westbury,    L.    I. 
Sound  installation  man  was  Walter  Bickmeyer,  116  Main  St.,  Hempstead,  N.  Y. 
Speakers  are  used  for  announcing  to  race  crowds. 


give  us  their  parts  and  tube  business. 
"The  dealers,  knowing  that  we  will 
not  compete  with  them  in  sales  will 
purchase  their  sound  equipment  and 
accessories  from  us  as  there  would  be 
no  inducement  for  them  to  purchase 
sound  equipment  from  some  of  the 
manufacturers  who  sell  to  dealers  on 
what  we  term  jobber's  discounts. 

Refer  prospects 

''Prospects  on  sound  equipment  who 
talk  to  us  are  referred  to  dealers  for 
followups  and  in  instances  where 
more  than  one  dealer  is  figuring  on  a 

FOR  QUALITY  RECORDING 


A  console  recorder  in  handsome  woods, 

also  for  public  address  or  for  straight 

record-playing — a  Presto  at  $295. 


particular  job,  we  will  supply  the 
same  information  to  each  dealer  in- 
sofar as  his  prices  are  concerned  and 
let  him  submit  his  individual  bid.  We 
do  not  interfere  in  any  way  with  the 
prices  which  he  quotes  other  than  in- 
sisting that  he  maintain  the  estab- 
lished list  prices  which  are  in  effect 
on  the  various  manufactured  items. 

"Installation,  service,  and  mainte- 
nance charges  are  left  entirely  up  to 
the  dealer. 

"We  have  an  investment  in  stock 
at  our  cost  of  approximately  $2,500  in 
sound  equipment,  speakers,  and  all 
other  accessories  used  in  sound  instal- 
lation work  and  are  in  a  position  to 
figure  on  any  job  from  low  powered 
systems  to  the  centralized  systems 
which  run  into  considerable  money. 

"The  method  employed  by  us  has 
been  most  satisfactory  to  us  and  to 
our  dealers  in  general  and  we  do  not 
consider  making  any  changes  which 
might  jeopardize  the  respect  which  we 
have  from  the  dealers  and  service  men 
in  our  territory. 

"The  sound  field  has  unlimited  pos- 
sibilities and  we  have  hopes  that  more 
of  our  dealers  will  become  interested 
and  enter  the  field." 

CONTACT  MIKE  IN  P.A. 

The  field  that  the  contact  unit 
opens  to  the  P.A.  man  and  the  help 
that  it  gives  to  the  musician  can  be 
gained  from  a  few  typical  installa- 
tions. A  ten-piece  band  for  example 
was  using  two  violins,  a  cello  and  a 
piano — the  rest  brass  and  drums; 
contact  mikes  were  placed  on  the  two 
violins,  the  cello  and  the  piano, 
bringing  the  output  up  to  that  of 
the  brass.  The  orchestra  now  sound- 
ed as  if  it  were  a  small  symphony  of 
approximately  25  men,  whereas  be- 
fore the  strings  were  hardly  heard. 


September,  1938 


23 


EXTRA  LINES  FAVORED 

Additional  sources  of  profit  today 


NEW  INTEREST  IN  RAZORS 

The  event  that  most  radio  men  were 
waiting  for,  in  the  electric  razor  busi- 
ness, has  taken  place.  Led  by  Pack- 
ard Lektro-shaver,  the  leading  manu- 
facturers have  cut  their  prices. 

In  a  survey  conducted  among  deal- 
ers in  seven  states,  Eadio  Today  found 
the  majority  of  dealers  in  this  frame 
of  mind:  "We  can  sell  more  razors  if 
the  well-known  best-sellers  will  reduce 
their  prices.  In  the  past,  the  main 
difficulty  has  been  that  people  don't 
want  to  pay  the  current  prices  for  a 
shaver.  As  a  rule,  our  radio  customers 
are  good  prospects  for  razors." 

While  the  results  of  the  survey  are 
being  compiled,  the  manufacturers  of 
the  shavers  announced  lower  prices, 
so  it  appears  that  the  dealer  group 
got  exactly  what  it  wanted. 

Also  noticeable  in  the  dealer  reports 
were  these  items:  Prices  are  not  al- 
ways maintained  on  this  merchandise. 
And  nobody  is  doing  any  outside  sell- 
ing on  shavers,  at  the  moment. 

HAY-FEVER  SEASON 

The  fact  that  a  big  part  of  the 
TJ.  S.  population  has  a  tendency  to- 
ward hay  fever  is  something  for  air- 
conditioner  salesmen  to  remember, 
according  to  Larry  Gubb  of  Philco, 
who  has  been  busy  analyzing  the 
market  for  his  firm's  new  Cool-wave 
unit. 

"While  there  is  no  medical  cure  for 
hay  fever,  it  has  been  found  that  air- 
conditioning  prevents,  relieves  and 
often  eradicates  it  by  completely 
filtering  room  air  of  all  dust,  dirt  or 
pollen  which  is  responsible  for  the 
disease." 

WHAT  IT  TAKES  TO  SELL 

The  characteristics  of  "the  perfect 
salesman"  have  been  abruptly  out- 
lined by  Detrola  sales  manager  "Jim" 
Davin:  (1)  He  has  the  curiosity  of  a 
cat;  (2)  the  tenacity  of  a  bulldog; 
(3)  the  determination  of  a  taxi 
driver;  (4)  the  diplomacy  of  a  way- 
ward husband;  (5)  the  patience  of  a 
self-sacrificing  wife;  (6)  the  enthusi- 
asm of  a  flapper;  (7)  the  friendliness 
of  a  child;  (8)  the  good  humor  of  an 
idiot;  (9)  the  assurance  of  a  college 
boy;  (10)  the  tireless  energy  of  a  bill 
collector. 


Indian's     portable     Koolroom     model 
cleans,  circulates  and  properly  humid- 
ifies the  air.     List,  $175. 

MARRY  AN  OVEN 

*  A  man  who  knew  less  than 
nothing  about  cooking,  a  jobber  sales- 
man, recently  had  the  nerve  to  cook 
four  turkeys  for  a  bunch  of  appliance 
dealers  in  Portland,  Ore.  The  dealers 
were  in  the  room  and  hungry  and 
they  might  have  been  nasty  if  the 
dinner  turned  out  badly,  but  the  sales- 
man didn't  care. 

His  name  is  Ray  Mello,  of  North 
Coast  Electric  Co.,  Crosley  distribu- 
tors in  Portland  and  Seattle.  The 
jobbers  had  called  the  meeting  to 
talk  about  Mystic  Ovens  and  other 
things,  and  thought  it  would  be  nice 
if  they  could  prove  that  cooking  could 
be  done  without  having  a  housewife 
mixed  up  in  it.  Poor  Mr.  Mello  was 
picked  because  he  was  altogether 
dumb  about  scullery  tricks. 

But  there  was  considerable  porce- 
lain and  not  a  few  gadgets  on  Mi. 
Mello's  side,  and  he  emerged  from  the 
affair  with  as  fine  a  dinner  as  ever 
came  off  a  high  line. 


R.F.D.   Special  by  Crosley,   6  cu.   ft. 
season-priced  at  $99.95. 


Some  40  radio  dealers  of  the  NY  Met- 
ropolitan area  lost  their  1939  fran- 
chises, in  a  single  week,  for  violations 
of  the  radio  price  structure.  At  the 
Aug.  24  meeting  of  Electrical  Appliance 
Dealers  Association  of  Brooklyn,  N.  Y., 
where  this  data  was  discussed,  radio 
committee  chairman  Percy  Peters  re- 
minded the  group  that  they  were  being 
"shopped"  every  day  for  further  price- 
cutting  offenses.  He  declared  that  he 
would  read  the  names  of  new  violators 
at  the  next  meeting  of  the  organiza- 
tion. 

Association  committees  for  1938  have 
been  named  by  president  James  J. 
Schneer:  Finance — Thomas  S.  Forker, 
chairman;  Max  J.  Zimmer,  Percy 
Peters  and  Meyer  Eisenberg ;  member- 
ship— Edward  J.  Dunne,  chairman; 
Sam  Klein  and  James  W.  Josephs; 
display — Max  Zimmer,  chairman;  Sol 
Scholder,  M.  Eisenberg  and  Max  Hol- 
lins;  educational — George  Magna;  fair 
trade — Percy  Peters,  chairman;  Rus- 
sell A.  Atkinson,  M.  Zimmer  and  Mar- 
tin A.  Tarzian;  by-laws — T.  Forker, 
chairman;  R.  Atkinson,  A.  H.  Grafen- 
stadt,  M.  Tarzian  and  M.  Zimmer; 
inter-association  relations — R.  Atkin- 
son, chairman;  T.  Forker,  M.  Tarzian, 
Percy  Peters,  Ralph  Ceriello  and  Al- 
bert H.  Bernhard. 

The  Association  elected  a  full-time 
executive  secretary  in  the  person  of 
Tom  Bolger,  who  will  establish  Brook- 
lyn offices  for  added  service  to  the 
members  of  the  organization. 

Peaslee-Gaulbert  Corp.  will  now  dis- 
tribute Steioart  Warner  radios,  refrig- 
erators and  gas  ranges  in  the  Atlanta, 
Ga.,  area,  according  to  news  from  SW 
sales  manager  John  W.  Ditzell.  Fac- 
tory branch  operations  of  the  Stewart- 
Warner  Distributing  Co.  have  been 
taken  over  by  Peaslee-Gaulbert,  but  the 
plan  does  not  affect  the  factory  branch 
at  Birmingham,  Ala.  The  Atlanta  job- 
ber will  also  handle  SW  products  in 
the  Jacksonville,  Fla.,  and  the  Louis- 
ville, Ky.,  areas. 

New  manager  of  the  air  condition- 
ing and  heating  dept.  of  the  Auto 
Equipment  Co.,  the  Denver,  Colo.,  job- 
bers, is  Harold  H.  H.  Clark,  who  takes 
the  post  after  long  experience  in  the 
ventilating,  heating  and  air-condition- 
ing industry.  After  an  impressive 
technical  training  in  Chicago,  Mr. 
Clark  spent  some  time  abroad  and 
later  worked  with  Simplex  and  Norge. 

Large  group  of  retailers  and  indus- 
try officials  went  to  the  first  "popular 
priced"  golf  party  sponsored  by  the 
Wisconsin  Radio  Refrigeration  &  Ap- 
pliance Association,  Milwaukee.  Plans 
for  the  big  affair  were  handled  by  golf 
committeemen  E.  H.  Schaefer,  W.  D. 
Baker  and  Ray  Haasch. 

Radios  and  refrigerators  made  by  the 
Detrola  Corp.  are  now  among  the  prod- 
ucts listed  as  eligible  for  financing  by 
the  Electric  Home  and  Farm  Authority 
of  Washington,  D.  C. 

Benny  Ginsburg,  of  Smith-Benny 
Sales  Co.,  11  W.  42nd  St.,  New  York 
City,  eastern  representatives  for  the 
Steem-Electric  iron,  reports  a  500  per 
cent  increase  in  sales  of  the  product 
in  the  last  five  months. 


24 


Radio  Today 


EVERY    DEALER    CAN    SELL 

this  amazing  new 

STEEM-ELECTRIC     IRON 


Here  is  a  new  year-round  profit- 
builder  for  the  radio  dealer — new  in 
safety,  convenience  and  SALES  AP- 
PEAL. It  combines  the  efficiency  of 
electricity  with  the  advantages  of 
steam  and  operates  on  the  principle 
used  by  the  finest  tailors  and  laundries. 


STEEM-IRON— already  displayed  and 
demonstrated  in  many  of  the  largest  and  finest 
stores — is  destined  to  replace  ordinary  irons  as 
surely   as   the   modern   refrigerator   is    replacing 
the  old-fashioned  ice  box. 

Write  at  once  for  the  full  story  of  this  new 
merchandising  opportunity.  See  the  attractive 
window  and  counter  displays,  consumer  litera- 
ture, etc.,  all  furnished  free  with  initial  shipments. 


Complete  with  approved  cord 
and  plug,  asbestos  pad,  funnel, 
directions  and  guarantee. 


14    AMAZING    FEATURES 

•  NO  SPRINKLING  OR  ROLLING 

•  NO  MORE  MILDEWED  CLOTHES 

•  NO  BURNING  OR  SCORCHING 

•  NO  PRESS  CLOTHS 

•  NO  CONSTANT  LIFTING 

•  SAFE  TO  FINE  FABRICS 

•  SAFE  TO  SYNTHETIC  FABRICS 

•  SAFE  TO  HEAVY  WOOLENS 

•  REJUVENATES  PBLE  FABRICS 

•  BLOCKS  FELTS — KNITTED  WEAR 

•  STERHJZES  AS  IT  IRONS 

•  WEIGHT  6  POUNDS 

•  OPERATES  ON  A.C.  OR  D.C. 

•  FULLY  GUARANTEED 


Approved  by  the 

Underwriters  Laboratories,  Inc. 

Manufactured  by 


lfL£CTR,C\        STEEM-ELECTRIC  CORP. 


TRADE         I  RON         MARK 

September,  1938 


1726  Lafayette  Avenue 


St.  Louis,  Mo. 

25 


NEW  THINGS 

Latest    news    of  radio   products    from    manufacturers 


Delco  receivers 


*  Line  of  3  consoles  and  5  table 
models  for  power-line  operation. 
Sets  feature  push-button  tuning. 
Model  R-1143  illustrated  has  7 
tubes,  tunes  535-18,000  KC  in  3 
bands.  Phonograph  switch  and  con- 
nector. Dual  8-inch  speakers  — 
variable  tone  control.  Permeability 
push-button  tuning  for  6  stations. 
United  Motors  Service,  Inc.,  3044  W. 
Grand  Blvd.,  Detroit,  Mich. — Radio 
Today. 


Symphonic  phonograph 
pick-up 

*  Inductor-type  pick-up  using 
the  needle  itself  for  an  armature. 
Has  no  major  or  minor  resonant 
peaks.  True  tangent  operation. 
Only  1%  ounce  needle  pressure. 
Heavy  die-cast  arm.  Acoustic  com- 
pensation. No  hum  pick-up.  High- 
fidelity  and  wide-range  models  for 
12-  and  16  inch  records.  Model 
PH12  for  12-inch  records — list  $8.50. 
Bruno  Labs.,  30  W.  15th  St.,  New 
York,  N.  Y. — Radio  Today. 


Miniature  tubes 

*  Compact  tubes  designed  for 
hearing  aids  and  other  devices 
where  extremely  small  size  is  re- 
quired.      Operate     on     battery     no 


larger  than  flashlight  type.  Fila- 
ment consumes  70  mils  at  1.4  volts. 
Tube  1%  inches  high  overall. 
Available  in  triode,  pentode  voltage 
amplifier,  and  pentode  output  am- 
plifier, with  or  without  bases.  Hy- 
tron  Corp.,  Salem,  Mass. — Radio  To- 
day. 


Belden  clear  channel  antenna 

■*•  All-wave  antenna  system  us- 
ing shielded  two-wire  transmission 
line.  Separate  coupling  trans- 
formers provided  for  short-wave  and 
broadcast  reception.  Shielded  line 
eliminates  need  of  lightning  arres- 
tor.  Maximum  efficiency  from  400 
to  22,000  KC  with  no  dead  spots. 
Type  8300— list  $6.90.  Belden  Mfg. 
Co.,  4647  W.  Van  Buren  St.,  Chicago, 
111. — Radio  Today'. 


Clough-Brengle  tube  checker 

*  Compact  tube  tester  for 
speedy,  safe  checking.  Over  600 
tube  types  on  chart.  Has  only  2 
switches — function  and  range.  Pro- 
vides for  29  measurements  includ- 
ing capacity,  AC  volts,  decibels. 
Model  135  Uni-checker.  Clough- 
Brengle  Co.,  2815  W.  19th  St.,  Chi- 
cago, 111. — Radio  Today. 


RCA  tube  tester 

*  Highly  efficient  tube  tester  for 
all  types  of  tubes  including  the  new 
\xk  volt  types.  Magic  eye  tubes 
also  tested  for  brilliance  and  eye 
action.  Eleven  buttons  on  panel 
released  or  retained  automatically 
as  required.  Roller  chart  has 
easily  read  figures  for  setting  con- 
trols. Tests  made  according  to 
R.M.A.  standards.  Type  156-A  with 
carrying  case— $39.95.  RCA  Mfg. 
Co.,  Front  St.,  Camden,  N.  J.— 
Radio  Today. 


Crosley  console 

*  Eleven-tube  all-wave  receiver 
with  large  radio-log  dial  having  call 
letters  of  103  stations.  Foreign  sta- 
tions also  listed.  Eight  push  but- 
tons for  automatic  tuning.  Plug-in 
remote  control  with  25-foot  cable 
available.  12-inch  dynamic  speaker. 
Model  1128M.  Crosley  Radio  Corp., 
1329  Arlington  St.,  Cincinnati,  Ohio 
— Radio  Today. 


Television  kit 

*  Complete  television  kit  de- 
signed for  assembly  by  the  buyer. 
Set  uses  15  tubes  in  addition  to 
5-inch  cathode  ray  tube.  Electro- 
static deflection  of  the  catray  tube. 
Kit  of  all  parts  with  tubes  lists  for 
$99.90.  Designed  and  marketed  by 
Garod  Radio  Corp.,  who  reputedly 
introduced  the  first  all  -  electric 
radio.  115  Fourth  Ave.,  New  York, 
N.  Y  —  Radio  Today. 


Silvered-mica  capacitors 

*  Mica  condenser  having  silver 
deposited  directly  on  the  mica.  Con- 
densers have  very  low  temperature 
coefficient.  Molded  in  low-loss  bake- 
lite  and  impregnated  in  a  high-Q 
wax.  Available  in  capacity  toler- 
ances of  1,  2,  3,  5  per  cent.  Aerovox 
Corp.,  70  Washington  St.,  Brooklyn, 
N.  Y—  Radio  Today. 


26 


Radio*  Today 


r>r 


CUES  YOU  MUSE 


Ofc  ..     B,Jio 


VALUE 

>8S.OO 
14.95 


■,    „  1939  -Oo»l«  GMd'   Ridi° 
1.  Magnificent  l»s» 

2    RCA  Victrola  Ati 

3'.  Your  choice  of  »««»  "  vtooV  Record  Society 

*  Review  and  Membersh.p  ^^  yALUE 


<> 


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FOR  ONLY 


IP 


SMAU  DOWN  PAYMENT 
EASY  TERMS        -i 


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"f_  vinor  Record 


RCA  VICTOR     | 

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sll.00  Value 


GENUINE  ^#  ' 
,   ELECTRIC  TUNING 

AS  LOW  AS     $| 


SEE  YOUR 


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-^^        *  advert»5inS        ftne  ot  tbe  «*>*  a 

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DEALER  TODAY! 


September,  1938 


27 


MORE   NEW   THINGS 


Oil-filled  condensers 

*  Capacitors  hermetically  sealed 
in  round  containers.  Impregnated 
and  filled  with  fire-proof  Dykanol, 
a  high-dielectric  impregnant.  Units 
are  well  suited  for  high-power  am- 
plifiers and  medium-powered  trans- 
mitters. Fully  described  in  catalog 
161.  Cornell-Dublier  Corp.,  South 
Plainfield,  N.  J. — Radio  Today. 


G-E  multi-meter 

*  Multi-range  meter  with  2000 
ohms  per  volt  sensitivity.  Ranges: 
0/5/20/100/500/1000  volts  DC, 
0/8/32/160/800/1600  volts  AC,  DC 
milliamperes:  0/%/10/100.  Resist- 
ance %  ohms  to  4  megs,  in  3  scales. 
Capacity:  .0005  to  10  mfd,  in  2 
ranges.  Decibels  from  minus  15  to 
plus  59.  General  Electric  Co.,  570 
Lexington  Ave.,  New  York,  N.  Y. — 
Radio  Today. 


Electric  shaver  filter 

*  Filter  unit  designed  for  use 
with  electric  shavers.  Contained  in 
a  bakelite  housing  1%  in  diameter 
by  2%  inches  long.  Provides  an 
attenuation  of  100,000  microvolts  in 
the  noise  voltage  impressed  upon 
the  electric  power  lines  by  the 
razors.  Listed  by  Underwriters 
Labs.,  Model  R-l.  Tobe  Deutsch- 
mann  Corp.,  Canton,  Mass. — Radio 
Today. 


Admiral  superhet 

•  6-tube  AC  table  model  with 
push-button  for  6  stations.  Tunes 
from  175  to  560  and  16%  to  54  me- 
ters. 6-inch  dynamic  speaker.  Cab- 
inet of  straight-grain  walnut.  Illus- 
trated on  a  preceding  page.  Model 
547-6G.  Continental  Radio  &  Tele- 
vision Corp.,  3800  W.  Cortland  St., 
Chicago,  111. — Radio  Today. 


Low-cost  crystal  pick-up 

*  Phonograph  pick  -  up  using 
crystal  element.  Solid-wood  tone 
arm  in  walnut  finish.  Crystal  unit 
shielded  by  outer  metal  shell. 
Tracking  error  reduced  to  3  to  4 
per  cent.  Output  of  2  volts  at  1000 
cycles.  Mellotone  model  X-78-A-3 — 
list  $5.90.  Webster  Electric  Co., 
Racine,  Wis. — Radio  Today. 


Operadio  amplifier 

*  13-tube  6-stage  amplifier  with 
4  input  channels.  Volume  expansion 
and  compression.  Provision  for  re- 
mote controller.  Beam-power  out- 
put tubes.  Electronic  visual  over- 
load and  output  indicators.  Non- 
resonant  equalizer  for  high  and 
low  frequencies.  Type  855-R.  Ope- 
radio Mfg.  Co.,  St.  Charles,  111. — 
Radio  Today. 


Silvered  mica  condenser 

*  Silvered-mica  condenser  with 
unusually  stable  characteristics. 
Temperature  coefficient  of  .000025 
mmf/mmf/°C.  Power  factor  of  .04 
per  cent.  Supplied  in  values  from 
15  to  2  500  mfd.  Impregnated  and 
wax  sealed  in  low-loss  ceramic 
case.  Erie  Resistor  Corp.,  Erie, 
Pa. — Radio   Today. 


Detrola  superhet 

*  Pee  Wee  super  in  solid  walnut 
cabinet.  5  metal  tubes.  Iron-core 
transformer.  Tunes  540-1720  KC. 
Beam  power  output  tube.  Dynamic 
speaker — automatic  volume  control. 
Model  199W— list  $14.95.  Detrola 
Corp.,  1501  Beard  Ave.,  Detroit, 
Mich. — Radio  Today. 


High-frequency  resistors 

*  Power-type  resistors  for  use 
at  high  frequencies.  Frequency  char- 
acteristic essentially  flat  up  to  60,- 
000  KC.  Power  ratings  of  5,  10,  25, 
50,  150  watts.  Metallized  coating 
applied  to  a  ceramic  tubing.  De- 
signed especially  for  terminating 
resistors  in  transmitting  antennas. 
Type  MP.  International  Resistance 
Co.,  401  N.  Broad  St.,  Philadelphia, 
Pa. — Radio  Today. 


■ 


Compact  velocity  mike 

*  Smallest  complete  velocity 
microphone  ever  made.  Supplied 
with  output  transformer,  cable  con- 
nector, and  switch.  Output  of  — 70 
DB.  Frequency  response  from  60 
to  7000  cycles.  High  and  low  im- 
pedance models.  Case  of  molded 
rubber  with  chrome  trim.  List  ?25 
with  25-foot  cable.  Amperite  Co., 
561  Broadway,  New  York,  N.  Y. — - 
Radio  Today. 


Metropolitan  model  radio 

*  Magic  keyboard  radio  with 
pushbutton  selection  of  8  stations. 
Designed  for  true-fidelity  reception 
of  local  stations.  Illustrated  on  a 
preceding  page.  Tunes  to  broadcast 
band  only.  Inverse-feedback  audio 
system  for  low  distortion.  Speaker 
uses  peri-dynamic  bass  reflex  system 
for  extension  of  low  frequencies. 
Model  91-827.  Stewart  Warner  Corp., 
1826  Diversey  Ave.,  Chicago,  111.— 
Radio  Today. 


28 


Radio  Today 


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MORE  NEW  THINGS 


Midget  exponential  speaker 

*  Folded  exponential  horn  with 
P.M.  reproducer.  Will  handle  5 
watts.  Overall  depth  of  only  8 
inches.  Bell  10  inches  in  diameter. 
Frequency  response  from  100  to 
5000  cycles.  Designed  for  use  as  a 
speaker  and  talk-back  unit  in  inter- 
communicating system.  Model  WX- 
5SP— list  $11.50.  Atlas  Sound  Corp., 
1451  39th  St.,  Brooklyn,  N.  Y.— 
Radio  Today. 


Non-skid  screw  drivers 


*  Screw  driver  with  small  teeth 
milled  in  point  which  keeps  screw 
driver  from  slipping.  Removes 
screws  with  less  pressure  since 
point  does  not  have  tendency  to  slip 
out  of  slot.  Prevents  injury  to  screw 
and  exposed  surfaces.  Special  radio 
designs  with  insulated  handles — 
magnetized  or  non-magnetizp'l  tips. 
Bridgeport  Hardware  Mfg.  Corp., 
Bridgeport,  Conn. — Radio  Today. 


Clarion  sound  system 

*  15-18  watt  sound  system  using 
beam  power  amplifier  with  modern 
fading  and  mixing  facilities.  Choice 
of  microphone.  Universal  output 
impedances  for  matching  to  load. 
Dual  10-inch  P.M.  speakers  with 
wall  baffles.  Mike  stand  and  all 
cables  for  installation.     Model  C414 


—list  $104.40.  Transformer  Corp. 
of  America,  69  Wooster  St.,  New 
York,  N.  Y.— Radio  Today. 


60-watt  sound  system 

*  Five-stage  15-tube  sound  sys- 
tem having  multi-stage  degenera- 
tion, high-speed  expander,  remote 
control,  dual  tone  compensation. 
Four  input  mixing  circuits.  Vari- 
able output  impedances.  Output  of 
60  watts  ample  for  handling  out- 
door applications  with  crowds  in  ex- 
cess of  20,000  persons.  Unit  sup- 
plied with  2  P.M.  speakers  and 
choice  of  dynamic  or  velocity  mikes. 
Webster-Chicago  model  FR60.  Web- 
ster Co.,  5622  Bloomingdale  Ave., 
Chicago,,  111. — Radio  Today. 


Low-cost  multi-meter 

*  Pocket  type  meter  having 
ranges  of  0/5/50/500/1000  volts  DC 
at  1000  ohms  per  volt.  Resistance 
range  of  0/1000/500M  ohms.  Cur- 
rent range  of  0/1  mil.  Metal  case 
measures  3%  x  6  x  2  inches.  Net 
$7.95.  Million  Radio  &  Television 
Labs.,  685  W.  Ohio  St.,  Chicago,  111. 
— Radio  Today. 


Co-axial  cable 

*  Low-loss  type  of  co-axial  cable 
for  all  purposes  including  high  fre- 
quencies. Capacity  of  only  11% 
mfd.  per  foot.  Losses  of  .0009  DB 
per  foot  at  1000  KC.  Characteristic 
impedance  of  82%  ohms.  Uses  low- 
loss  polystyrene  base  insulating 
beads.  No.  14  solid  copper  wire 
conductor.  Special  coupling  con- 
nectors available.  Type  73 — list  60 
cents  per  foot.  American  Phenolic 
Corp.,  1250  W.  Van  Buren  St.,  Chi- 
cago, 111. — Radio  Today. 


Decca  record  player 

*  Electric  phonograph  with  8- 
inch  speaker  .  Automatic  on-off 
switch.  Arm  lifts  vertically  and 
automatically  for  convenience  in  re- 
placing needle.  Crystal  type  pick- 
up. Finished  in  hand-rubbed  wal- 
nut veneers,  Model  DE5— list  $69.50. 
AC-DC  model  $79.50.  Decca  Records, 
Inc.,  50  W.  57th  St.,  New  York,  N.  Y. 
— Radio  Today. 


Presto  recorder 

*     Recording   machine   with 
features  of  the  Junior  model, 
other    improvements.      Makes 
plays    records    up    to    12-inch 
Can  be   used   as   portable  P.A. 
tem.      Has    10-inch    speaker. 
$189.     Presto  Recording  Corp., 
W.    19th    St.,    New    York,    N. 
Radio  Today. 


the 
plus 

and 
size. 

sys- 
List 

139 
Y.— 


Simpson  tube  tester 

•  Small-size  tube  tester  weigh- 
ing only  7-pounds.  Five-inch  meter 
with  scale  marked  "good"  and 
"bad."  Tests  all  tubes  including 
plug-in  resistors.  Double  filament 
switching  for  special  tubes  such  as 
5X4G,  5Y4G,  etc.  Neon  bulb  short 
check.  Phone  jack  for  noise  tests. 
R.M.A.  standard  circuit  used.  Model 
333— net  $26.50.  Simpson  Electric 
Co.,  5218  W.  Kinzie  St.,  Chicago, 
111. — Radio  Today. 


30 


Radio  Today 


ilftv 


I 


1 


WITH  THE 


GUARANTEED 


SEALED^' 

at  m  <"tory  *° 

0R  pROtECTlON 


□  CONSISTENT  advertising  story 
over  a  period  of  15  years  has 
given  RCA  Radiotrons  an  un- 
matched public  acceptance  ...  a 
public  acceptance  that  will  continue! 


RCA  presents  the  Magic  Key  every  Sunday,  2  to  3  P.  M., 
E.D.S.T.,  on  the  NBC  Blue  Network 


Ask  your  RCA  Radio  Tube  Distributor  for  complete 
details  concerning  the  new  "Money  Back"  merchandis- 
ing program  designed  especially  for  radio  tube  dealers. 


HE   MICRO-SENSITIVE   RADIO  TUBES 


Vv 


Over  325  million  RCA 
radio  tubes  have  been 
purchased  by  radio 
users  ...  in  tubes,  as 
in  radio  sets,  it  pays  to 
go  RCA  All  the  Way. 


MORE  NEW  THINGS 


Philco  tube  tester 

*  Automatic  tube  tester  with 
accurate  push-button  testing.  Ultra- 
simplified  controls  plus  automatic 
selection  of  voltage  applied  to  tube. 
Only  2  controls  require  setting.  Re- 
volving chart  indicates  setting  of 
all  controls.  Large  illuminated 
meter.  Neon  tube  short  test.  Model 
033— net  $51.  Philco  Radio  &  Tele- 
vision Corp.,  Tioga  and  C  Sts., 
Philadelphia,  Pa. — Radio  Today. 


Bogen  recording  machine 

•*•  Dual-action  control  does  away 
with  complicated  adjustments,  low- 
ering recording  head  to  record 
surface  and  automatically  engaging 
drive  screw.  Eliminates  record 
spoilage  and  needle  breakage.  Cast- 
aluminum  turntable  is  dynamically 
balanced.  For  10-  and  12-inch 
records  at  78  r.p.m.  Optional 
change-over  to  33  r.p.m.  Model 
R12P  with  carrying  case — $149.50. 
David  Bogen  Co.,  663  Broadway, 
New    York,    N.    Y. — Radio    Today. 


RCA  school  sound  system 

*  Table  model  sound  system  for 
schools  requiring  a  low-cost  unit. 
Control  cabinet  houses  a  radio  set, 
phonograph  turntable,  monitoring 
loudspeaker,  switch  controls  for  20 


classrooms.  Provision  made  for  add- 
ing 20  more  rooms.  Two-way  com- 
munication provided  from  class- 
rooms to  office.  RCA  Mfg.  Co., 
Cooper  St.,  Camden,  N.  J. — Radio 
Today. 


Automatic  phonograph 

*  AC-DC  portable-electric  phono- 
graph with  automatic  record 
changer.  Four-tube  high-fidelity 
amplifier  with  power  output  tube. 
General  Industries  record  changer 
with  true-tangent  crystal  pick-up. 
Handles  eight  10-inch  or  seven  12- 
inch  records.  Model  90-F  with 
fabricoid  covering  —  list  $99.50. 
Model  90-C  in  cowhide— $115.  Porto- 
matic  Corp.,  1013  Madison  Ave., 
New  York,  N.  Y. — Radio  Today. 


Portable  sound  system 

*  Universal  powered  sound  sys- 
tem. Power  output  of  20-30  watts 
on  both  6  volts  and  AC.  Beam 
power  output  tubes.  Three  input 
channels  with  electronic  mixers. 
Variable  tone  control.  Phono  turn- 
table with  crystal  pick-up.  Choice  of 
mikes,  dual  12-inch  speakers  and 
aluminum  baffles.  Supplied  ready 
to  operate.  Lafayette  model  817T. 
Wholesale  Radio  Service  Co.,  100 
Sixth  Ave.,  New  York,  N.  Y. — Radio 
Today. 


Voltage  dropping  power  cords 

*  Resistance-type  cords  for  AC- 
DC  sets.  Each  cord  made  up  of  3 
conductors,  enclosed  in  a  heavy 
braided  covering.  Tie  cord  at 
chassis  end  relieves  strain.  Eight 
types  handle  all  standard  110  volt 
sets.  Clarostat  Mfg.  Co.,  Inc.,  285 
N.  6th  St.,  Brooklyn,  N.  Y—  Radio 
Today. 


Master  recorder 

*  Recording  machine  for  high- 
fidelity  recording  on  wax  and  all 
types  of  instantaneous  discs.  16- 
inch  turntable  weighs  100  pounds 
and  driven  by  belt  at  33%  and  78 
r.p.m.  Self-starting  synchronous 
motor.  Turntable  heat-treated  and 
aged  to  prevent  any  possible  warp- 
ing. Universal  Microphone  Co., 
Inglewood,  Cal. — Radio  Today. 


Hickok  show  lab 

*  Radio  service  panel  to  aid  ser- 
vicemen in  merchandising  tube 
sales  and  set  service.  All  instru- 
ments are  in  line  and  at  eye  level 
for  accuracy  in  reading  scales.  Six 
convenient  receptacles  with  fuses. 
Long  lumaline  lamps  inset  at  top. 
Rack  holds  one  to  3  instruments. 
Panel  only  with  lamps — list  $23.40. 
Hickok  Electrical  Instrument  Corp., 
10514  DuPont  Ave.,  Cleveland,  Ohio 
— Radio  Today. 


Plug-in  resistors 

*  Two  types  of  plug-in  resistors 
to  replace  most  of  the  R.M.A.  types 
having  an  octal  base.  Base  of  the 
ballastron  has  two  removable  pins 
and  a  thin  metal  strip  which  can 
be  cut  at  one  or  more  colored  dots. 
User  refers  to  R.A.  type  number  re- 
quired on  instruction  sheet.  List 
$1.  Micamold  Radio  Corp.,  Flush- 
ing Ave.,  Brooklyn,  N.  Y. — Radio 
Today. 


Chassis  jacks 

*  Adjustable  chassis  jacks  for 
supporting  radio  set  when  in  up- 
side-down position  on  bench.  Will 
fit  all  types  of  radios.  Made  of 
metal  and  finished  in  wrinkle  paint. 
Model  CJ2 — per  pair,  net  $1.25. 
General  Cement  Mfg.  Co.,  Rockford, 
111. — Radio  Today. 


32 


Radio  Today 


PHONOGRAPH-RADIOS 

Today's   Opportunity 


For  months,  now,  radio  men  have  been  looking 
for  some  new  feature  that  will  encourage  the 
public  to  spend  more  money  on  receiving  sets — 
some  new  "plus"  to  make  people  want  to  replace 
their  old  radios  with  fine  new  1939  musical  in- 
struments. 

And  obviously  the  answer  is  the  phonograph- 
radio   "combination." 


When   he    wants  it 

For  a  combination  furnishes  so  much  that  the 
listener  wants — and  supplies  it  at  the  instant 
when  he  wants  it. 

A  combination  doubles  the  original  enjoyment 
of  the  radio.  Through  the  magic  of  recorded  music 
and  amplified  pick-up,  the  listener's  favorite 
mood  can  be  recaptured  at  any  moment  and 
enjoyed  again  at  will. 


Double  pleasure 

With  "double  pleasure"  thus  to  be  expected 
from  the  modern  phonograph-radio  combination, 
it  is  not  surprising  that  Mr.  and  Mrs.  Purchaser 
readily  justify  expending  for  it  far  more  money 
than  they  would  ever  outlay  on  a  radio  set  alone. 

Recent  years  have  seen  the  average  price  of 
radio  sets  sink  steadily.  Starting  ten  years  ago 
around  a   hundred  dollars,  the   radio-set  average 


has  slumped  progressively  through  $75  and  $50 — ■ 
until  it  now  stands  somewhere  around  $35. 

Record  sales  soar 

If  radio  merchandise  is  to  be  lifted  out  of  this 
$35  level  and  back  again  above  the  $100  line, 
combinations  can  be  depended  on  to  do  it. 

Records  and  record-playing  devices  of  all 
kinds  are  in  demand  today.  Sales  of  records  have 
jumped  40f  {  above  a  year  ago.  Combinations 
are  offered  in  increasing  numbers  of  models  by 
more  and  more  manufacturers.  In  short  this  is  going 
to  be  a  combination  year. 

No  home  will  be  complete  this  season  without 
a  record-playing  instrument  to  supplement  the 
wonderful  programs  on  the  air. 

Every   home  a   prospect 

So  it  becomes  a  matter  of  combing  over  lists 
of  past  radio  purchasers  to  turn  them  into  prospects 
for  combinations.  Customers  who  come  in  to 
purchase  lower-bracket  radios  should  be  shown 
how  much  more  entertainment  satisfaction  they 
can  buy  in  a  combination.  Sales  of  combinations 
can  thus  lift  radio  selling  back  to  prosperous  levels. 
That  is  why  every  radio  man  must  help  make 
1938-1939  a  combination  year! 

And  remember,  every  combination  sold  means 
more  pleasure  to  the  owner,  more  profit  to  the 
dealer. 


Radio  Today,  September,   1938 


September,  1938 


33 


SALES  SUCCESS  ON  COMBINATIONS 

Profit-making  methods  used  to  move  phonograph-radios  and  records 


Scores  of  modern  "ways  to  sell" 
have  been  used  by  the  go-getting 
dealers  who  are  out  after  the  phono- 
graph-radio business,  combined  with 
the  sale  of  records. 

To  move  this  merchandise,  there 
are  some  interesting  adjustments  to 
be  made  in  the  promotion  schedule  of 
radio  stores.  Mostly,  these  changes 
are  simple  and  inexpensive,  once  you 
get  an  idea  of  what  kind  of  skill  is 
involved. 

A  prize  example  is  furnished  by 
Good  Housekeeping  Shops,  Detroit, 
who,  after  20  years  of  successful  mer- 
chandising of  appliances  and  radio, 
have  recently  added  combinations  and 
records.    The  report  from  Detroit : 

''That  a  large  and  constantly  grow- 
ing portion  of  the  public  wanted  rec- 
ords and  phonographs  had  for  some 
time  been  the  growing  conviction  of 
Frank  W.  Hackett,  general  manager. 
This  conviction  was  based  upon  his 
personal  observation  of  his  friends 
and  family  and  their  attitude  towards 
radio  entertainment.  His  personal 
observation  was  further  confirmed  by 
what  he  saw  in  the  trend  of  Good 
Housekeeping  Shop's  radio  sales. 

"Having  decided  to  go  into  the 
record  and  phonograph  business,  he 
adopted  as  his  guiding  principle  that 
everything  was  going  to  be  done  right 
or  not  at  all.  Therefore,  no  false 
economies    were   tolerated.       Starting 


from  scratch,  a  complete  department, 
including  shelving,  counter  and  three 
booths  were  constructed,  everything 
new  and  of  good  quality,  no  attempt 
being  made  to  adapt  old  store  equip- 
ment to  the  peculiar  needs  of  this 
new  department. 

"The  booths  are  sufficiently  large, 
completely  sound-proofed  by  means  of 
double  walled  construction,  air-con- 
ditioned and  furnished  in  the  very 
best  of  taste  for  the  convenience  of 
the  public  using  them. 

Peak  comes  in  December 

"After  less  than  six  months  of  op- 
eration in  this  new  enterprise,  Good 
Housekeeping  Shop  indicates  definite 
and  satisfactory  progress  in  its  record 
and  combination  department  in  spite 
of  adverse  business  conditions.  An- 
other important  point  to  bear  in  mind 
is  that  the  record  and  combination 
business  has  a  definite  seasonal  trend, 
being  peaked  at  about  December  or 
January,  with  the  lowest  point  about 
May.  So  the  firm  started  in  the  rec- 
ord and  combination  business  when 
the  business  was  at  its  lowest  ebb  for 
the  year.  Definite  figures  show  that 
they  have  had  a  consistently  increas- 
ing volume  of  business,  week  after 
week,  with  no  exceptions.  The  hun- 
dreds of  new  customers  who  now  visit 
the  record  departments  of  the  several 


branches  of  Detroit's  Good  House- 
keeping Shop  regularly  have  had  a 
very  direct  and  beneficial  effect  on  ap- 
pliance sales.  The  sale  of  a  very  im- 
portant number  of  refrigerators, 
ranges,  ironers,  and  washers  is  di- 
rectly attributed  to  the  increased  vol- 
ume of  store  traffic  which  a  record  de- 
partment creates. 

Stocking  up 

"The  main  store  proudly  boasts 
that  they  have  the  most  complete  se- 
lection of  records  in  the  State  of 
Michigan,  going  even  to  the  extent  of 
carrying  in  stock  some  of  the  best 
and  most  outstanding  HMV  records 
imported  from  England.  The  im- 
portance of  this  in  attracting  record 
buyers  cannot  be  over  estimated.  The 
branches  carry  complete  stocks  of  all 
the  latest  records  and  all  the  'best 
sellers'  in  the  Bed  Seal  and  Album 
class.  If  the  branches  get  a  record 
customer  whose  tastes  extend  beyond 
this  the  records  are  obtained  for  him 
or  he  is  referred  to  the  main  store 
where  he  can  be  assured  of  finding 
what  he  wants. 

Definite  system  needed 

"Eight  from  the  start  the  so-called 
'green  stock  envelope'  system  of  han- 
dling the  stock  and  ordering  was  used. 
This  method  was  developed  by  and 
recommended  by  ECA-Victor.  It  is 
difficult  to  understand  why  many  rec- 
ord retailers  attempt  to  operate  a  de- 
partment without  this  or  any  other 
definite  system  when  the  inevitable 
result  of  the  proper  use  of  the  'green 
stock  envelope'  system  is  lower  inven- 
tory, greater  turnover,  and  much  bet- 
ter service  to  customers. 

"Every  album  set  in  stock  is  re- 
moved from  the  factory  wrappings 
and  can  be  heard  by  a  customer  for 
the  asking.  This  is  in  direct  contrast 
to  the  attitude  of  some  retailers,  who 
acting  upon  misguided  motives,  are 
not  very  enthusiastic  about  opening 
an  album  set  for  a  customer  to  hear 
unless  they  practically  have  definite 
assurance  in  writing  that  he  is  think- 
ing seriously  of  buying  it.  The  com- 
paratively small  percentage  of  people 
who  will  abuse  this  privilege  by  con- 
stantly dropping  in  for  free  concerts 


At  the  left,  the  display-studded  record 
department  at  Gimbel  Bros.,  Pittsburgh. 


Radio  Today 


Bwmn 


Philco's   "mystery  control"  captures   everybody's  interest.      Even   Atlantic   Man- 
ager   Peter    Kain    and    Vice-president    Sayre    Ramsdell,    can't    stop    dialling    the 
little  mystery  box  which,  without  wires,  controls  the  set  at  left. 


can  soon  be  spotted  and  discouraged 
in  a  nice  way.  On  the  other  hand, 
regular  customers  should  be  encour- 
aged to  listen  to  as  many  records  as 
possible.  That's  the  only  way  they 
can  be  sold. 

Hiring  salespeople 

"Most  new  record  dealers  when  look- 
ing for  sales  people  for  their  record 
department  assume  that  a  knowledge 
of  music  is  of  primary  importance. 
While  Good  Housekeeping  Shop  did 
not  for  a  moment  overlook  or  under- 
rate this  important  factor,  they  did 
make  it  secondary  to  the  fact  that 
first  of  all  they  wanted  honest-to-good- 
ness  sales  persons  behind  their  record 
counters.  Sales  girls  who  could  con- 
stantly keep  in  mind  that  their  pri- 
mary purpose  in  being  there  was  to 
sell  records  and  not  to  indulge  in 
long-winded  esthetic  discussions  of 
music,  except,  of  course,  when  good 
business   indicated   that   they   should. 

"It  is  not  uncommon  to  come  across 
that  type  of  record  salesgirl  who  can 
and  will,  at  the  slightest  provocation 
argue  with  their  customer,  regarding 
a  difference  of  opinion  concerning  a 
composition,  composer,  conductor,  or 
particular  interpretation.  In  matters 
of  this  type  the  customer  should  al- 
ways be  right.  The  wise  record  clerk 
will  catalog  a  customer  as  a  buyer 
of  certain  types  of  music  and  then  sell 
him  more  records  of  that  type,  rather 
than  to  attempt  to  educate  him  musi- 
cally, which  a  customer  naturally  re- 
sents unless  he  has  specifically  indi- 

At  the  right,  the  Good  Housekeeping 

Shop,  Detroit,  features  convenience  and 

comfort   for   customers,    in    a   compact 

corner. 

September,  1938 


cated  that  he  desires  the  opinions  of 
the  clerk  in  selecting  his  records. 
With  these  principles  in  mind  Good 
Housekeeping  Shop  selected  and 
trained   its   personnel. 

Starring  promotion 

"Coincidental  with  the  opening  of 
the  store  the  public  was  informed  by 
radio,  large  newspaper  ads,  direct 
mail,  and  telephone  that  Good  House- 
keeping Shops  were  selling  records 
and  combinations.  As  a  special  added 
attraction  record  buyers  were  in- 
formed that  by  dropping  in  at  any  of 
the  record  departments  they  would  be 
given  free  a  copy  of  the  latest  record 
catalog  in  a  special  leatherette  cover 
imprinted  with  the  customer's  name. 
There  was  a  very  large  demand  for 
these  catalogs  and  placed  the  store  in 


direct  contact  with  hundreds  of  people 
who  were  definitely  enough  interested 
in  recorded  music  to  take  the  time  and 
trouble  to  come  in  and  ask  for  one. 

"Since  the  opening  of  the  main 
store  Good  Housekeeping  Shop  has 
been  on  the  radio  three  times  a  week 
over  a  local  Detroit  station.  This 
program  comes  at  the  dinner  hour 
and  features  all  types  of  records,  par- 
ticularly the  latest  ones,  and  points 
out  to  the  listeners  where  they  may 
be  purchased  and  also  reminds  them 
of  the  obvious  advantages  of  owning 
a  combination  instrument  for  home 
entertainment. 

"Without  a  lapse  Good  Housekeep- 
ing Shop  has  also  carried  out  a  con- 
sistent program  of  newspaper  adver- 
tising, including  tie-ins  with  national 
ads  on  records  and  also  with  the  Sun- 
day record  review  columns  of  the  local 
newspapers. 

"Greatly  effective  use  has  also  been 
made  of  direct  mailings  to  special 
groups,  such  as  the  symphony  and 
opera  subscription  lists,  doctors,  musi- 
cal  organizations,   schools,  etc. 

"One  of  the  most  effective  and  yet 
one  of  the  most  neglected  promotional 
methods  which  can  be  used  to  sell  rec- 
ords is  a  consistent  and  logical  use 
of  the  telephone.  This  method  is  also 
being  profitably  used  with  good  re- 
sults. 

Calling  personally 

"Last,  but  not  least,  and  somewhat 
of  an  innovation  is  personal  calls.  A 
certain  number  of  people  can  be  sold 
records  in  this  way,  who  ordinarily  do 
not  have  the  time  or  the  inclination 
to  come  in  and  buy.  Single  calls  of 
this  type  have  actually  resulted  in 
orders  for  dozens  of  album  sets 
amounting  to  hundreds  of  dollars. 

"The    Good    Housekeeping    Shops 
(Continued  on  page  46) 


■■■ 


LIFE  Magazine  recently 
sent  a  questionnaire  to  thou- 
sands of  its  readers,  asking 
questions  of  great  impor- 
tance to  you.  Look  at  the 
answers.  They  definitely 
prove  two  things: 

1.  That  public  interest  in 
Victor  Records  and  Victro- 
las  soars  higher  every  day 
—  creating  a  highly  profit- 
able market  for  you  to  take 
advantage  of. 

2.  That  Victor  Records  and 
RCA  Victrolas  are  the  line 
for  you  to  stock  — for  vol- 
ume sales  and  profits! 

LIFE  ASKED 
1. 

Have  you  purchased  any 
phonograph  records  in  the 
If  so,  what 


past  year.' 
brands? 

80.6 


answered 
"VICTOR!" 


2. 

If  you  were  to  purchase  an 
instrument  that  combined 
radio  and  record  entertain- 
ment, what  make  would  you 
most  likely  buy? 


52.7 


o 


answered 
'RCA  VICTOR! 


Brand  "A"  received  8.3%  of 
the  votes,  Brand  "B"  4.0%, 
Brand  "C"  2.3%. 


^-~- "^  nrdco«5C,0ne5  have     *      ord 

Because.^  thcord  tans,  *ebeurae-  *         steady  P 
*°**£S  atldUrd  business,  too,  ds  rf  «£ 

toeaoS    „  moo*  att    ;V\  pay  ^oU  rv    and  $e      Aeroandsr   aS  vou 

°n*  RJSf,  bono,  to > *  M„  ^J j £»£ 

^ben  y°u.Sodocetoeot  to  $9.00  ^  s  Reco 

Sod 
and 


36 


Radio  Today 


/      RCA  VICTOR 
Overwhelming  Choice! 


RCA  MANUFACTURING 

COMPANY,  INC. 
Camden,  New  Jersey 


A  Service  of  the 

Radio  Corporation  of 

America 


September.  1938 


37 


LIFE  Magazine  recently 
sent  a  questionnaire  to  thou- 
sands of  its  readers,  asking 
questions  of  great  impor- 
tance to  you.  Look  at  the 
answers.  They  definitely 
prove  two  things: 

1.  That  public  interest  in 
Victor  Records  and  Victro- 
las  soars  higher  every  day 
—  creating  a  highly  profit- 
able market  for  you  to  take 
advantage  of. 

2.  That  Victor  Records  and 
RCA  Victrolas  are  the  line 
for  you  to  stock  — for  vol- 
ume sales  and  profits! 

LIFE  ASKED 
1. 

Have  you  purchased  any 
phonograph  records  in  the 
past  year?  ...  If  so,  what 
brands? 


80.6% 


answered 
"VICTOR!" 


If  you  were  to  purchase  an 
instrument  that  combined 
radio  and  record  entertain- 
ment, what  make  would  you 
most  likely  buy? 


52.7? 


answered 
•RCA  VICTOR!" 


Brand  "A"  received  8.3%  of 
the  votes,  Brand  "B"  4.0%, 
Brand  "C"  2.3%. 


{)      RCA  VICTOR 
'Overwhelming  Choice! 


„•  plans.  V  \ndttia     ,  to  coast  u       victtolas 

Because"1        d fan*- ^u the tt®e'^ith  stea^  V 
^tS  ^dVatf  business,  too,  *  o{  o** 

OnWRg7  Uonu**0  „#f  \*»* 


lecorcs  of'^Re^ ^  that     • ■       , 
*eVi«OIJ ewithout  ^an^Xsed-  _^* 


PRO 


iAO-n°N 


EVE^ 


^STtR 


\N' 


^°?oV>t 


RCA  Victrola  Model  U-128 

Offers  such  outstanding  fea- 
tures as  Gentle  Action  Auto- 
matic Record  Changer,  Crys- 
tal Pickup  with  Top  Loading 
Needle  Socket,  and  has  a  10- 
tube,  3-band  radio  with  Elec- 
tric Tuning.    .     .     .     $185* 

RCA  presents  the  "MagicKey"  every 

Sunday,  2  tot  p.  M.,  E.  D.  S.  T.,  on 

the  NBC  Blue  Network. 


RCA  Victrola  Model  U-134-A 

18th  Century  Cabinet  Style, 
High  Fidelity  Electric  Magic 
Voice,  Crystal  Pickup,  Au- 
tomatic Record  Changer  for 
10"  and  12"  records,  Top 
Loading  Needle  Socket,  and 
has  16-tube,  7-band  Electric 
Tuning  Radio,  $355*  in  wal- 
nut, $365*  in  mahogany. 
<-RCA  Victrola  Model  U-119 
Ahandsometableinstrument 
of  modern  design  with  self- 
starting  motor,  Crystal  Pick- 
up and  6-tube,  3-band  Elec- 
tric Tuning  Radio.  $79.95* 

For  Finer  Radio    Performance  - 
RCA  Victor  Radio  Tubes 


RCA  Victrola  Attachment  R93-B 

which  has  proved  so  popular  with 
thousands.  Easily  attached  to  any 
AC  radio,  it  plays  records  through 
the  radio.  .  (list  price)  $14.95 
mden.  New  Jersey 


7?CA1/u 


RCA  MANUFACTURING 

COMPANY,  INC. 
Camden,  New  Jersey 

A  Service  of  the 

Radio  Corporation  of 

America 


36 


Radio  Today 


September.  1938 


37 


107  Radio  SI 
Leading  News 


The  World's  Greatest 

Salesman  of  Record - 

Playing  Instruments 

The  Victor  Record  Catalog  is  often 
called  the  world's  greatest  encyclope- 
dia of  recorded  music  .  .  .  the  world's 
greatest  salesman  of  Victor  Records. 
But  it  is  also  the  fundamental  approach 
to  sales  of  RCA  Victor  record-playing 
instruments.  Your  best  prospects  for 
RCA  Victrolas  are  the  growing  army 
of  people  who  are  buying  Victor 
Records.  Now  that  the  record  busi- 
ness is  booming,  this  fact  is  more  im- 
portant than  ever:  the  world's  greatest 
artists  are  on  Victor  Records  —  and 
that's  no  idle  boast ! 


FOR  FINER  RADIO  PERFORMANCE- 

RCA  VICTOR  RADIO  TUBES 

RCA  presents  "Magic  Key" every  Sunday, 

2-3p.n1.,  E.D.S.T.,  on  NBC  Blue  Network 


•*£&&« 
fe 


The  World's  Greatest  Artists  are  on  Victor  Recorc 

Only  Victor  Records  offer  you  the  definite  sales  a 
vantage  of  "Higher  Fidelity!"  Because  only  Victt 
Records  are  produced  by  the  world-famous  Higher  I 
delity  process — the  recording  method  that  enables  the 
records  to  capture  and  preserve  the  full  range  of  beau 
from  low  to  high.  In  addition,  only  Victor  enables  y< 
to  sell  the  recordings  of  the  world's  greatest  artists 
because  the  world's  greatest  artists  are  on  Victor  Re 
ords.  And  these  highly  important  sales  points  are  sour 
reasons  why  it  will  pay  you  to  stock,  feature  and  s« 
Victor  Higher  Fidelity  Records! 


RCA  MANUFACTURING  COMPANY,  INC.,  Camden.  N.  J.   •   a  Service  of  the  R* 


38 


Radio  Today 


ions.... 22  Magazines.... 
per s.... tell  millions  about 


'The  M-,    - 
°rtl  P^«  g,c  Key  „*  &  ' 

Sln«  ■  •  ■  DZ  ' '  ■  na«onaf  1  Pro^am      „. 
^Plk  —        *Van"V.eny^y"«.en, 


°NTHE 
AIR 


SALES 
In*7'0"* 


2**im 


p«om,s0ANLEs 

K    HANS 


of  America 


September,  1938 


39 


107  Radio  Sttions.. 
Leading  Newsapers . 


22  Magazines.... 
tell  millions  about 


The  World's  Greatest 
Salesman  of  Record - 
Playing  Instruments 

The  Victor  Record  Catalog  is  often 
called  the  world's  greatest  encyclope- 
dia of  recorded  music  . . .  the  world's 
greatest  salesman  of  Victor  Records. 
But  it  is  also  the  fundamental  approach 
to  sales  of  RCA  Victor  record-playing 
instruments.  Your  best  prospects  for 
RCA  Victrolas  are  the  growing  army 
of  people  who  are  buying  Victor 
Records.  Now  that  the  record  busi- 
ness is  booming,  this  fact  is  more  im- 
portant than  ever:  the  world's  greatest 
artists  are  on  Victor  Records— and 
that's  no  idle  boast! 

FOR  FINER  RADIO  PERFORMANCE- 

RCA  VICTOR  RADIO  TUBES 

RCA  presents"  Mugic  Key"  every  Sunday, 

2-}p.m.,  E.D.S.T..  on  NBC  Blue  Network 


^MJniM>Wf!^k  ^M         ^^  Want 


8t"LD;A,G 

S4L£S 
°*  THE 


SALES 
"AKIN**DS 

MAGAZINE 


.ftoKHATlVE 

Pom»^sm 

P*0M0T,0NS 

puhs 


The  World's  Greatest  Artists  are  on  VictorReeords 

Only  Victor  Records  offer  you  the  definite  sales  ad- 
vantage of  "Higher  Fidelity!"  Because  only  Victor 
Records  are  produced  by  the  world-famous  Hujner 
deliry  process-the  recording  method  rhatenab '« '"" 
records  to  capture  and  preserve  the  full  range  ot  ne     j 
from  low  to  high.  In  addition,  only  Victor  enables  yo 
to  sell  the  recordings  of  the  world's  greatest  art is 
because  the  world's  greatest  artists  are  on  Vic™ 
ords.  And  these  highly  important  sales  points  are  : » 
reasons  why  it  will  pay  you  to  stock,  feature  an 
Victor  Higher  Fidelity  Records! 


*  JSSSL 


38 


RCA  MANUFACTURING  COMPANY,  INC..  Camden.  N.  I, 


ft  COMBINATIONS  THAT 


New  1939  PHONOGRAPH  with  PHILCO 
Automatic  Record-Changer  Model  35  PCX 


You  get  greater  Volume  and  greater  Profit  from  this 
model !  Famous  CAPEHART  Automatic  Record  -  Changer 
plays  and  changes  ten  10-  and  12-inch  records 
automatically  .  .  .  PHILCO  plus  CAPEHART  for  easier 
selling!  With  PHILCO  INSTANT  Electric  Push-Button 
Tuning  of  8  stations.  American  and  foreign  radio  reception. 


LIST    PRICE 


225 


A  FAST  SELLING  MODEL   IN 
CLASS-QUICKER  TURNOVER!  j 

PHILCO — the  greatest  name  in  radio — now  « 
take  full  advantage  of  the  big  demand  for  rad  I 
. . .  with  PHONOGRAPH  WITH  PHILCO!  ExclJI 
features  plus  the  famous  PHILCO  name  and  t 
turnover . .  .  more  volume  and  more  profit  fri 
And  PHONOGRAPH  WITH  PHILCO  gives  youl 
1939  models  ...  a  model  in  every  price  clci 
outstanding  value!  Cash-in  on  this  new  and  I 
business  .  .  .  and  cash-in  with  PHONOGRAPH 
way  to  take  full  advantage  of  your  radio-t 
display,  demonstrate,  and  sell  PHONOGRAI 
PHILCO  distributor  at  once  .  .  .  PHONOGRAi 
PHILCO  selling  power  to  the  radio-phonogrf 


Easier  to  Sell!  PHI 

The  PHILCO  name  by  itself  wi 
this  new  PHONOGRAPH  Wl"f 
more  to  sell!  PHONOGRAPH* 
tation  and  sales-producing  * 
Automatic  Record-Changer  . 
to  for  greater  profits. 

New!   Exclusivi 
REPRODUCER  in 

Only  PHONOGRAPH  WITH  If 
new  Semi-Automatic  feature  » 
the  turntable  motor,  close  tl 
matically!  Lift  and  close  theli 
automatically!  100%  perfectr 


10  New  PHONOGRAPH  with  PHILCCIi 

PHONOGRAPH  w,th  PHILCO  RECO 

SEE  YOUR   PHILCO  DIS11 

•  d-.v,,*  r/;nuiu  (.;_!,«..  ;_   n    I 


%?,f% 


% 


RY  PRICE 
EATER  PROFITS! 

=s  it  possible  for  you  to 
nonograph  combinations 
fast-selling  phonograph 
Formance  means  quicker 
svery  dollar  you  invest! 
complete  line...  11  new 
.  .  and  every  model  an 
table  radio-phonograph 
ITH  PHILCO!  The  fastest 
nograph  prospects  is  to 
//ITH  PHILCO!  See  your 
VITH  PHILCO  brings  real 
business  ! 

L/*/CAPEHART! 

nake  demand  merchandise  of 
IILCO  line!  But  you  get  even 
H  PHILCO  gives  you  the  repu- 
;r  of  the  famous  CAPEHART 
feature  you  can  "grade-up" 

EMI-AUTOMATIC 
w- Priced  Models! 

D  Dealers  will  profit  from  this 
j  to  demonstrate  .  .  .  just  start 
,  and  the  record  plays  auto- 
and  the  record  repeats  itself 
ring  ! 

idels  *4995  to  $395* 

LAYER  $25.00 

BUTOR  TODAY 


Great 
PHILCO 


I*  St** 


^mo,„  n./h°nogranL  yE°ntroi, 


%  ***!'"»*  Feat 


Plosive  p 


toon/ 


%ger, 
fy/i/Hr.SyVWi/cerr 


ngin£vi 


eiy  Hotel  i 


>..■'. :.,..':.»         J 


New  Chairside  Model  19  PCS 


LIST 
PRICE 


8950 


•SBS? 


/ 


Here's  the  special-purpose  model  your  customers 
will  want  instantly!  With  Semi-Automatic  Record 
reproduction  .  .  .  just  close  the  lid  and  the  needle 
automatically  finds  the  first  groove  and  the  record 
starts  to  play.  PHILCO  INSTANT  Push-Button  Tuning. 
American  and  foreign  radio  reception! 


mm 

fa 


* 


Automatic  Record -Changer  Model  19  PA 


An  amazing  value  that  will  move  fast!  Auto- 
matic record -changing  phonograph  plays 
eight  10-inch  records  automatically,  12-inch 
records  manually  and  repeats  them  !  INSTANT 
Push-Button  Tuning    PHILCO   Radio.  American 


LIST    PRICE 


'139»° . 


4** 


^tiWHwrnnvuius 


New  1939  PHONOGRAPH  with  PHILCO 
Automatic  Record-Changer  Model  35  PCX 


&$ 


WITH 


<70> 


A  FAST  SELLING  MODEL  IN  EVERY  PRICE 
CLASS-QUICKER  TURNOVER!  GREATER  PROFITS! 

PHILCO — the  greatest  name  in  radio— now  makes  it  possible  for  you  to 
take  full  advantage  of  the  big  demand  for  radio-phonograph  combinations 
.. .  with  PHONOGRAPH  WITH  PHILCO!  Exclusive  fast-selling  phonograph 
features  plus  the  famous  PHILCO  name  and  performance  means  quicker 
turnover ...  more  volume  and  more  profit  from  every  dollar  you  invest! 
And  PHONOGRAPH  WITH  PHILCO  gives  you  the  complete  line  ...  11  new 
1939  models  ...  a  model  in  every  price  class  .  .  .  and  every  model  an 
outstanding  value!  Cash-in  on  this  new  and  profitable  radio-phonograph 
business  ...  and  cash-in  with  PHONOGRAPH  WITH  PHILCO!  The  fastest 
way  to  take  full  advantage  of  your  radio-phonograph  prospects  is  to 
display,  demonstrate,  and  sell  PHONOGRAPH  WITH  PHILCO!  See  your 
PHILCO  distributor  at  once  .  .  .  PHONOGRAPH  WITH  PHILCO  brings  real 
PHILCO  selling  power  to  the  radio-phonograph  business ! 

Easier  to  Sell!  NILtO/»/«*  CAPEHART! 

The  PHILCO  name  by  itself  would  make  demand  merchandise  of 
this  new  PHONOGRAPH  WITH  PHILCO  line!  But  you  get  even 
more  to  sell!  PHONOGRAPH  WITH  PHILCO  gives  you  the  repu- 
tation and  sales-producing  P»«er  of  the  famous  CAPEHART 
Automatic  Record-Changer  .■•  °  feature  you  can  "grade-up" 
to  for  greater  profits. 

New!  Exclusive  SEMI-AUTOMATIC 
REPRODUCER  in  Low-Priced  Models! 


You  gel  greater  Volume  and  greater  Profit  from  this 
model!  pornous  CAPEHART  Automatic  Record -Changer 
ploys  and  changes  ten  10-  and  12-inch  records 
automatically  .  .  .  PHILCO  plus  CAPEHART  for  easier 
selling!  With  PHILCO  INSTANT  Electric  Push-Button 
Tuning  of  8  stations.  American  and  foreign  radio  reception. 


LIST    PRICE 


'225 


Only  PHONOGRAPH  WITH  *CO  Dealers  will  profit  from  this 
new  Semi-Automatic  feat"^  to  demonstrate  . .  .  just  start 
the  turntable  motor,  close ,1 Ml, .and I  the  record  plays  auto- 

ss;i^p""'',H' "' 

nhTmiitun  «-.»  «",",*  ,,49's  umr 

nuunn  ».™  rum  ■«*"""  »"■■» 
SEE  YOUR  PHILCO  DlSWlORTODAi 


4  Sm?A> 

^op!"**,,,, 


ft/***/ 


7i 
roll 


•MS 


mek     -^cen 


New  Chairside  Model  19  PCS 


•ii  \ 


$89so 


Here's  the  special-purpose  model  your  customers 
will  want  instantly!  With  Semi-Aufomatic  Record 
reproduction  .  .  .  just  close  the  lid  and  the  needle 
automatically  finds  the  first  groove  and  the  record 
starts  to  play.  PHILCO  INSTANT  Push-Button  Tuning. 
American  and  foreign  radio  receptionl 


Automatic  Record -Changer  Model  19  PA 


An  omoiing  value  that  will  move  /aitl  Auto- 
matic record-changing  phonograph  ploys 
eight  10-inch  records  automatically,  12-inch 
records  manually  and  repeats  them  I  INSTANT 
Push-Button  Tuning  PHIICO  Radio.  American 


»139so 


L.  E.  Gubb,  Philco 


J.  H.  Clippinger,  Admiral 


P.  Crosley,  III.,  Crosley 


B.  Abrams,  Emerson 


WHY  WE  ARE  PUSHING  "COMBINATIONS 

Industry  leaders  tell  promotion  plans  for  Fall 


?J 


GREAT  BOON  TO  DEALERS 

By  L.  E.  Gubb 

President 

Philco  Radio  &  Television  Co. 

We  look  to  the  radio-phonograph 
combination  business  as  a  great  boon 
to  all  radio  dealers.  The  amazing  rise 
in  the  sales  curve  on  all  record  lines 
shows  a  buying  interest  in  combina- 
tions on  the  part  of  the  public  never 
before  equalled  in  the  industry's  his- 
tory. Aggressive  dealers  throughout 
the  country  are  taking  full  advantage 
of  this  remarkable  consumer  demand 
to  substantially  increase  their  average 
unit  of  sale  by  pushing  radio-phono- 
graph combinations.  The  new  Phono- 
graph-with-Philco  line  will  give  the 
dealer  full  benefit  of  this  increasing 
demand,  backed  by  sound  advertising, 
merchandising,  and  sales  promotion 
plans.  New  and  exclusive  features  on 
Phonograph-with-Philco  models  give 
greater  performance  and  value  than 
ever  before. 


E.  H.  Vogel,  General  Electric 


ENTHUSIASTIC  AT  OUTLOOK 

By  Ernest  H.  Vogel 

Manager  Radio  Division 

General  Electric  Co. 

The  General  Electric  Company  has 
always  been  sincerely  interested  in 
the  sale  of  radio-phonograph  instru- 
ments and  has  consistently  carried  a 
number  of  such  instruments  in  its  line. 

In  1937,  there  was  definite  evidence 
of  increased  interest  on  the  part  of 
dealers  and  consumers  for  this  type 
of  instrument  and  we  believe  the  Fall 
of  1938  will  open  up  still  greater  op- 
portunities for  the  sale  of  complete 
musical  instruments  for  the  home. 

Our  line  this  year  reaches  into  all 
of  the  list  price  brackets,  offering  a 
table  model  radio-phonograph  combi- 
nation in  the  $40  bracket,  a  splendid 
non-automatic  lowboy  console  under 
$150  and  an  automatic  record-chang- 
ing lowboy  radio-phonograph  combi- 
nation well  under  the  $200  mark. 

GREAT  DEMAND 

By  Powel  Crosley,  III 
Vice  President,  Crosley  Radio  Corp. 

There  is  a  great  demand  for  radio- 
phonograph  combinations  for  a  number 
of  reasons — the  jitterbug  craze,  the  de- 
sire for  better  education  in  foreign 
languages,  the  need  for  controlled  edu- 
cation of  infants.  Many  people  have 
favorite  pieces  they  like  to  hear  when 
they  want  to.  To  enable  our  dealers 
to  get  this  extra  business,  we  are  sup- 
plying them  with  a  complete  line  of 
radio  -  phonograph  combinations  at 
prices  which  can  be  promoted  by  force- 
ful advertising  and  sales  aids. 

FINE  MUSIC  IN  THE  HOME 

By  J.  H.  Clippinger,   Vice   President 
Continental  Radio  &  Television  Corp. 

Admiral  believes  that  everyone  is 
interested  in  enjoying  fine  music  in 
home  and  is  entitled  to  the  opportunity 
through    medium    of    recordings.     Ad- 


miral's efforts  towards  the  develop- 
ment of  this  comparatively  new  phase 
of  radio  industry  are  reflected  in  com- 
plete range  phonograph  combinations 
with  fine  reproducing  qualities  and  at 
prices  making  them  within  everyone's 
reach. 

TRADE  INTEREST  TRIPLES 

By    John    F.    Ditzell,    Sales    Manager 

Radio  &  Appliance  Division 

Stewart-Warner  Corp. 

The  reasons  why  we  feel  that  radio- 
phonograph  combinations  will  be  an 
outstanding  success  this  year  are  quite 
tangible  in  that  our  initial  introduc- 
tion of  these  models  resulted  in  more 
than  three  times  as  many  orders  from 
our  distributors  as  we  had  anticipated, 
and  it  has  already  become  necessary 
for  us  to  make  four  additional  produc- 
tion releases. 

We  consider  that  tangible  evidence 
of  the  interest  on  the  part  of  dealers 
in  the  radio-phonograph  combination, 
(Continued  on  page  47) 


42 


J.   F.   Ditzell,   Stewart-Warner 

Radio  Today 


1939  will  be  a  great  year  for 
1  ^BAfrblY  dealer 
every 


PUSH  BUTTO 

YEAR* 


Compare  Crosley  radios  with  all  com- 
petitive models  and  note  the  reason 
dealers  are  making  more  sales  is  better 
tone,  better  performance,  more  tubes, 
bigger  speakers  and  better  circuits  AT 
ALL  PRICE  LEVELS. 


Crosley  offers  a  traffic  builder 
that  rolls  up  amazing  sales 
totals.  AC-DC.  Push 
button  and  knob  tuning. 
Electro-dynamic    speaker. 


Crosley  will  win  a  great 
market  with  this  portable 
push  button  electric  radio- 
phonograph.  Beam  Power 
tube  delivers  greatly  im- 
proved record  reproduction. 
New  self-starting  motor  and 
high  impedence  pick-up. 
Leather  strap  on  flush  cover 
makes  it  easy  to  carry.  Radio 
is  tuned  by  knob  or  by  instan- 
taneous positive  push  buttons. 


Crosley  presents  a  value  in  a 
superheterodyne  6  tube  regular 
and  shortwave  receiver  (the 
"SIXER")  even  greater  than 
the  famous  "FIVER".  5  push 
buttons  for  quick,  positive  tun- 
ing in  addition  to  conventional 
knob  tuning.  5-inch  dynamic 
speaker.  Brown  plastic  cabi- 
net. Out-performs  anything 
in  its  price  class. 


at 


$ 


49.95 


Crosley  presents  a  CONSOLE 
ELECTRIC  RADIO  PHONO- 
GRAPH of  beauty  and  great  effi- 
ciency. Power  transformer  with 
Beam  Power  tube  delivers  exqui- 
sitely true  record  reproduction. 
Illuminated  Radio  Log  dial.  Push 
button  radio  tuning  as  well  as 
conventional  knob  tuning.  Simple 
walnut-finished  cabinet  suggests 
elegance.  Thousands  will  buy 
now  that  such  quality  is  at  this 
price  level. 
Prices  slightly  higher  in  South  and  West 


•NOW,  MORE  THAN  EVER  ...   V 

You're  tkene,  with  a 


THE  CROSLEY  RADIO  CORP.,  CINCINNATI  •  POWEL  CROSLEY,  Jr.,  Pres.  •  Home  of  "the  Nation's  Station"— WLW— 70  on  your  dial 
September,  1938  43 


lBftlBh<tdM8aL.£4k'i2l 


In    the    upper    right    corner    is    the    Westinghouse 
WR472,  a  5  tube  AC  superhet  with  5  inch  speaker. 

Directly  above  is  the  new   Stewart-Warner  91-649 
combination,   with  Magic   Keyboard,  vertical  grill. 

At  the  left  is  Ansley's  "piano  of  the  future" — com- 
bined  radio,   record-player,   electronic   piano,   $595. 


STRIKING  SALES  FEATURES  AMONG  NEW  PHONOGRAPH-RADIOS 


At  extreme  right, 
Brunswick's 
"Sheraton"  com- 
bination,    $124.50. 


Center  right,  Wil- 

cox-Gay's     A  -  5  7 

record-player       at 

$29.95. 


Directly    at   right, 
Motorola's      59F1 
atop    record    cab- 
inet. 


At  extreme   right, 
a  top  combination 
by    General   Elec- 
tric. 


Center  right,  one 
of  Emerson's 
Symphony  Grand 
models,       $129.95. 


Directly   at   right, 

Fada's    6A80APC 

combination         at 

$229.50. 


44 


Radio  Today 


FOR  VOLUME  RADIO  SALES  IN  '39 


y/  CHECK 

THE  WESTINGHOUSE 
FEATURES  THAT  CLOSE  SALES! 


DOUBLE  CHECK 

/    THE  WESTINGHOUSE 
MERCHANDISING  PROGRAM 
THAT  PULLS  PROSPECTS!       ' 


Here's  a  radio  line  and  advertising  program 
specially  planned  to  sell  radios  f-a-s-t  ...  in 
volume  ...  at  a  profit!  Never  before  has 
Westinghouse  offered  such  radio  values  .  .  . 
packed  with  features  easy  to  demonstrate, 
easy  to  sell.  They're  the  talk  of  the  trade! 
New,  Instantaneous,  Push-Button  Tuning! 
S  t  ylingby  America's  f  oremos  t  radio  designers. 
Furthermore,  Westinghouse  offers  you  a  new 


and  effective  merchandising  program  de- 
signed expressly  for  your  local  use!  Coopera- 
tive newspaper  advertisements !  Colorful  floor 
and  window  displays!  2-color  Selling  Book. 
Consumer  literature  and  other  profit -build- 
ing helps.  It  will  pay  you  to  check  and  double 
check  this  unusual  business-getting  propo- 
sition. Call  your  local  Westinghouse  Repre- 
sentative today. 


Merchandise   Headquarters  —  Westinghouse   Radio  —  7.50    Varick   Street  —  New  York    City 


Westiiighoiis^fejjjJ 


September,  1938 


45 


READ  EVERY 
WORD  OF  THIS 

u 


JL  HIS  month  Presto  will  launch  the 
first  national  advertising  campaign 
ever  devoted  to  home  recording  .  .  . 
advertising  directed  to  your  custom- 
ers, to  get  business  for  you. 

O  PACE  will  be  used  in  six  national 
magazines  reaching  over  2.000.000  of 
the  wealthier  homes  where  recorders 
are  used  for  entertainment  .  .  .  six 
additional  magazines  reaching  musi- 
cians, actors  and  executives  in  the 
business,  advertising,  educational 
and  entertainment  fields  .  .  .  men  and 
women  who  make  important  uses  of 
sound  and  recording  equipment. 

J_  HIS  advertising  will  bring  scores 
of  new  customers  into  your  store. 
BUT  YOU  WONT  SELL  THEM 
UNLESS  you  have  a  Presto  recorder 
on  hand  at  your  store  to  demonstrate 
the  marvelous  quality  obtainable 
from  Presto  recordings. 

Why  not  be  ready  to  handle  this 
profitable  business?  Here  is  all  the 
demonstration    equipment  you    need. 


One  Presto,  Jr.,  recording  phono- 
graph     S149.00 

One  dozen  steel  cutting  needles..  3.00 
One  hundred  steel  playing  needles         .75 

Ten  10  in.  blank  discs 8.00 

Window     and     counter     displays, 
promotional   material,   sales  and 

operating  instructions    N/C 

TOTAL     §160.75  —  less     regular     dealer 
discount. 

Send  in  your  order  for  this  equip- 
ment today.  Be  the  first  in  your 
community  to  profit  from  the  fast- 
est growing  business  in  the  radio 
and    music   industries. 

PRESTO  RECORDING  CORP. 

137  W.  19th  STREET,  NEW  YORK,  N.  Y. 


SALES  SUCCESS 
ON  COMBINATIONS 

(From  page  '■'•'•  I 

are  looking  forward  to  a  constantly 
increasing  record  and  combination 
business.  T  believe,'  says  Mr.  Hack- 
ett.  'that  a  straight  radio  is  no  longer 
a  complete  instrument  for  home  en- 
tertainment, but  the  combination 
phonograph  and  radio  is.  Both  radio 
and  phonograph  fill  a  definite  need 
in  home  entertainment  and  one  can- 
not supplant  the  other.  The  degree  of 
perfection  -which  has  been  reached 
in  present  day  record  reproduction 
plus  the  advantage  of  having  'The 
Music  You  Want  When  You  Want 
It'  has  an  appeal  to  music  lovers 
which  cannot  be  resisted.  The  fact 
that  there  is  now  a  fine  combination 
instrument  available  in  almost  any 
price  class  opens  a  vast  new  market 
which  has  barely  been  touched.  Out- 
selling job  is  to  demonstrate  to  the 
public  that  we  have  something  they 
want  and  will  enjoy.'  " 

Let  it  demonstrate   itself 

A  Xew  York  dealer  has  hit  upon  a 
device  which  nets  him  a  great  deal 
of  customer-interest  in  combinations. 
It  applies  to  those  who  come  in  for  a 
radio.  When  the  sale  has  been  made, 
this  merchant  says  that  it  will  take 
a  minute  to  make  out  the  receipts; 
will  the  buyer  just  sit  down  a  minute 
and  listen  to  some  music? 

At  this  point,  the  dealer  starts  a 
likely-priced  combination  on  a  record, 
and  leaves  the  patron  alone.  The 
statement  about  the  receipt  is  pretty 
much  of  a  gag.  but  the  dealer  feels 
that  too  much  obvious  "selling-up" 
will  often  lose  sales.  This  device  lets 
the  prospect  develop  his  own  interest 
in  a  record-playing  instrument.  And 
in  many  cases  he  is  sufficiently  im- 
pressed by  the  quality  of  the  music  to 
make  inquiries.  Quietly,  it  starts  a 
whole  new  line  of  sales  talk. 

Also,  this  dealer  has  found  that  cus- 
tomers are  impressed  by  models  which 
change  their  own  records.  Therefore 
he  keeps  them  playing  on  the  sales 
floor.  An  instrument  which  turns  out 
a  constant  flow  of  impressive  music, 
without  attention,  will  often  draw 
prospects  toward  it,   automatically. 

A  store  with  a  specialty 

"During  the  past  ten  years,  90  per 
cent  of  our  total  radio  volume  has 
been  in  combinations,"  is  the  report 
from  Castellanos  Molina  Corp.,  Xew 
York  City,  where  the  sales  experts 
have  the  special  merchandising  prob- 
lem of  dealing  mostly  with  people  of 
Spanish  descent.  The  exceptional 
success  of  this  store  serves  as  a  les- 


son to  other  dealers — not  to  neglect 
the  tastes  and  the  buying  power  of 
prospects  of  this  type. 

This  firm  sells  about  $900  worth  of 
records  a  month.  The  sales  success  is 
based  mainly  upon  keeping  the  very 
latest  recordings  in  stock,  a  careful 
and  constant  understanding  of  wanted 
merchandise,  consistent  advertising  in 
newspapers  and  on  the  air,  and  the 
stocking  of  phonograph  radios  priced 
altogether  within  reach  of  the  cus- 
tomer group. 

Co-manager  Herman  Diaz  of  the 
company  believes  that  part  of  the  in- 
terest in  combinations  is  due  to  "a 
hang-over  from  the  old  phonograph 
days."  Many  people  still  have  an  old 
hand-wind  phonograph  and  a  few  rec- 
ords; they  will  readily  renew  their  in- 
terest in  these  matters  if  you  show 
them  what  modern  record  -  playing 
equipment  offers.  By  this  time  they've 
had  enough  experience  with  radio  to 
know  that  their  entire  musical  life 
cannot  be  rounded  out  by  broadcast- 
ing alone. 


WAX  WORTH  WATCHING 


TOMMY  D0RSEY  and  his  Clambake  Seven  playing 
A-Tisket  A-Tasket  and  As  Long  as  You  Live,  both 
with  Vli   by  Edythe  Wright — Victor  25899. 

HARRY  H0RLICK  and  his  orchestra  playing  The 
Merry    Widow    and    Gypsy    Princess — Decca    1944. 

FREDDIE  "SCHNICKELFRITZ"  FISHER  and  his 
oichestra  playing  When  They  Played  the  Polka,  with 
VC  by  Stan  Fritts,  and  Red  Wing,  with  VC — Decca 
1929. 

HENRY  BUSSE  and  his  orchestra  playing  I'm  Gonna 
Lock  My  Heart,  with  VC  by  Skip  Morr,  and  Figaro, 
with   VC   by   Don   Huston — Decca   1924. 

ELLA  LOGAN  singing  My  Bonnie  Lies  Over  the 
Ocean,  and  Blue  Bells  of  Scotland,  with  Perry  Botkin 
and   his    orchestra — Brunswick    S196. 

LARRY  CLINTON  and  his  orchestra  playing  My 
Heart  at  Thy  Sweet  Voice  and  A  Pretty  Girl  Milking 
Her   Cow.   both  with  VR  by  Bea  Wain — Victor  26024. 

SAMMY  KAYE  and  his  Swing  and  Sway  orchestra 
playing  Tu-Li-Tulip  Time  and  Don't  Cross  Your  Fin- 
gers. Cross  Your  Heart,  VR  by  Jimmie  Brown — Victor 
260i3. 

JOSEPH  RINES  and  his  St.  Regis  orchestra  play- 
ing Lambeth  Walk,  with  VR  bv  Rines  and  chorus,  and 
Je  Ne  Sais  Pa  Pa,  with  VR  by  Fifl  D'Orsay  and 
Rines — Victor    26015. 

KAY  KYSER  and  his  orchestra  playing  Love  of  My 
Life,  with  VC  by  Ginny  Simms,  and  When  the  Circus 
Came  to  Town,  with  VC  by  Simms,  Harry  Babbitt  and 
Ish-Ka-Bibble — Brunswick    S201. 

PENNY  WISE  and  her  Wise  Guys  playing  Don't  Let 
That  Moon  Get  Away,  from  "Sing  You  Sinners,"  and 
Side  Kick  Joe,  botli  with  vocal  by  Penny  Wise — 
Vocation  42S6. 

ELLA  FITZGERALD  and  her  Savoy  Eight  playing 
What  Do  You  Know  About  Love  and  If  You  Only  Knew, 
both  with   VC   by  Ella   Fitzgerald — Decca   1967. 

BING  CROSBY  singing  Small  Fry,  from  Paramount's 
"Sing  You  Sinners,"  and  Mr.  Crosby  and  Mr.  Mercer, 
assisted  by  Johnny  Mercer — Decca   1960. 

JIMMY  D0RSEY  and  his  orchestra  playing  Love  Is 
Where  You  Find  It  and  Garden  of  the  Moon,  botli 
from  First  National's  "Garden  of  the  Moon,"  both 
with  VC  by  Bob   Eberle — Decca   1970. 

THE  MERRY  MACS  singing  Stop  Beatin'  Round 
the  Mulberry  Bush  and  Pop  Goes  the  Weasel — Decca 
196S. 

TEDDY  WILSON  and  his  orchestra  playing  A-Tisket 
A-Tasket  and  Now  It  Can  Be  Told,  from  "Alexander's 
Ragtime  Band."  both  with  VC  by  Nan  Wynn — Bruns- 
wick  S199. 


46 


Radio  Today 


■ ' 


Sell  Combinations 

FASTER! 


•    •    • 


Dl'T  the  right  power  in  your  radio  - 
phonograph  combinations  :ind  go  to 
town  with  volume  sales.  Equip  your 
sets  with  FLYER  Motors,  for  the  ut- 
most in  uniform  speed,  quiet  running 
and  long  service,  with  low  motor  and 
installation  cost.  Self-starting-  gov- 
ernor-controlled induction  type.  Silent, 
laminated  hakelite  gears  running  in 
oil.  Long  over-size  bearings.  Range 
in  choice  to  meet  your  needs.  Get  your 
sets    worked   out   XOW. 

Test  the  Model  V 

Model  V  FLYER  Motor,  priced  for 
large-volume  use,  has  set-screw  speed 
adjustment.  Other  models,  with  pointer- 
and-dial  adjustment.  Order  samples  to 
test  out  in   your  cabinets. 

^General  Inbustodes  co. 

3838    Taylor    Street,    Elyri.-i,    Ohio 


RADIO 
TODAY 


•  Published  the  largest 
volume  of  radio  adver- 
tising during  the  last 
12  months. 

•  Showed  the  greatest 
increase  in  paid  circu- 
lation during  the  last  12 
months  and  also  the 
last  6  months. 

•  Has  the  lowest  adver- 
tising rate  per  thousand 
circulation. 

•  Is  preferred  by  large 
dealers,  as  proved  by 
reader-interest    tests. 

• 

22,000  Monthly  Guaranteed. 

•    Member  Audit  Bureau  of  Circulations     It 


WHY  WE  ARE  PUSHING 
COMBINATIONS 

I  From  pagi  42 1 
and  if  the  dealers  manifest  such  a 
lively  interest  it  is  only  reasonable  to 
assume  that  the  product  will  be  pro- 
moted to  the  retail  trade  and  substan- 
tial results  obtained. 

The  dealer  who  properly  demon- 
strates the  radio  phonograph  combina- 
tion is  the  one  who  will  receive  the 
greatest  benefits  from  this  type  of  ra- 
dio. The  dealer  should  be  equipped 
to  show  the  prospective  buyer  the 
"flexibility"  of  this  model,  through  an 
intelligent  demonstration  with  records, 
as  well  as  the  radio  feature. 

Simply  playing  an  ordinary  record 
will  not  convince  the  customer  of  the 
features  in  the  radio-phonograph  com- 
bination. Instead,  if  the  dealer  will 
point  out  the  tremendous  library  of 
records  by  favorite  artists  that  is  avail- 
able— and  the  user  can  select  his  own 
program  at  any  time,  in  addition  to 
having  all  that  is  on  broadcast  avail- 
able to  him,  the  customer  will  be  im- 
pressed. 

In  other  words,  a  demonstration  of 
the  radio  -  phonograph  combination 
should  actually  be  two  demonstrations: 
(1)  The  merits  and  features  of  the 
radio;  and  (2)  the  dealer  should  give 
the  same  intelligent  type  of  demon- 
stration of  the  phonograph  feature  that 
was  given  years  ago  in  the  successful 
promotion  of  the  Victrola. 

RECORD  SALES  CLIMB 

By  Henry  C.  Bonfig 

Commercial   Vice   President 

RCA   Manufacturing  Co.,   Inc. 

I  am  very  optimistic  about  business 
potentialities  in  "combination"  instru- 
ments this  Fall  for  the  following  rea- 
sons: 

1.  Record  sales  are  now  registering 
a  substantial  increase  for  the  sixth 
successive  year,  as  popular  interest  in 
recorded  music  of  all  types  continues 
to  build  up.  Radio  is  credited  with 
developing  a  vast  new  public  of  music 
lovers.  This  desire  for  more  and  bet- 
ter music  of  both  the  "classical"  and 
"swing"  type  can  best  be  satisfied,  I 
believe,  hy  the  Victrola,  as  an  adjunct 
of  the  radio  receiver. 

(Continued  on  page  48) 


FOR  THE  YOUNGSTERS 

Decca    lists   the   discs    "most    likely   to   succeed" 
among    the    children 

BARBAR  STORIES,  adapted  from  the  "Barter" 
books— Frank  Luther — 997-9. 

FRENCH  FOtK  SONGS  FOR  CH I  tDREN—  Louis 
Chartier — 23062-64. 

FAIRY  TAtES,  stories  with  sound  effects  and  Celeste 

—  Frank  Luther  and  Company — 590-2. 

HANSEL  AND  GRETEL  AND  THE  StEEPING 
BEAUTY,  as  told  by  the  Singing  Lady,  Irene  Wicker — 
1409-11. 

SNOW  WHITE  AND  THE  SEVEN  DWARFS— Frank 
Luther    and    Company — 1701-03. 

HOME  ON  THE  RANGE,  cowboy  songs,  sung  by 
Frank  Luther  and  the  Luther  Trio — 1127-9. 

MOTHER  GOOSE  RHYMES,  vocal  with  novelty  ac- 
companiment— Frank    Luther — 252-4. 

NURSERY  RHYMES,  vocal  with  novelty  accom- 
paniment— Frank  Luther — 3S3-5. 

TUNEFUL  TALES,  by  Rose  B'.umenthal — Frank 
Luther — 593-5. 

WINNIE    THE    POOH    AND    CHRISTOPHER    ROBIN 

—  Frank  Luther— 1389-91. 


Record  Changer, 
Motor,   Pickup  .  . 

All   One    Unit 

at   Low    Cost. 


i"1  ET  the  volume  business  with  radio- 
^-*  phonograph  automatics  that  the 
crowd  can  buy.  Use  General  Industries 
record  changer  units  in  your  sets.  Per- 
formance as  good  as  from  much  more 
expensive  machines.  Durable,  quiet- 
running  FLYER  Motors.  Changing 
mechanism  of  simple,  dependable  de- 
sign. High-fidelity  balanced  pick-up. 
Choice  in  styles  to  meet  your  re- 
quirements. 

Order  Samples  for  Testing- 
Get   going    NOW"   with    automatics    that 
SEI/L.      \\  hen    ordering,  specify  voltage 
and  frequency  of  current  you  use. 

^General  Inmjstkies  Co.. 

3S3S    Taylor    Street,    Elyria,    Ohio 


THE  MUSIC  SCOOP 
OF    THE    YEAR 

PORT#MATIC 


PORTABLE  AUTOMATIC 
ELECTRIC  PHONOGRAPH 

Plays     and     changes     10     or     12     inch 
records     automatically.       Unbe-     CQQ50 
lievable    tone.      S    unusual    tea-     *T .  «  - 
tnres.      AC-DC Llsl  Pnce 

Write  for  details  of  this  magnificent  instrument 
and  complete  line  of  portable  combinations,  etc. 

THE  P0RT-0-MATIC   CORPORATION 


1013  MADISON   AVE. 


NEW  YORK  CITY 


September,  1938 


47 


i  From   page  47) 

2.  RCA  Victor's  unremitting  efforts 
for  the  past  six  years  in  calling  public 
attention  to  the  advantages  of  recorded 
music  and  to  the  technical  advances 
in  recording  and  reproduction  are  bear- 
ing fruit  at  an  accelerating  pace.  We 
have  been  progressively  increasing  ad- 
vertising and  promotion  on  Victrolas 
and  records.  This  Fall,  our  advertis- 
ing expenditures  are  about  50  per  cent 
greater  than  last  year.  In  addition  to 
regular  magazine  and  newspaper  ad- 
vertising and  the  Magic  Key  program, 
records  and  Victrolas  are  receiving 
continuous  promotion  in  the  principal 
markets  through  17  stations,  six  nights 
a  week. 

3.  Test  campaigns  in  connection  with 
the  formation  of  the  Victor  Record  So- 


recQton 

Reduces  Price  of  Famous 
PHONO-ATTACHMENT 


High    fidelity     reproduction    in    most   convenient 
form!  Goes  under  or  over  a  radio;  pull  a  drawer 
and  you're  ready  to  play.  AC  or  DC,  1  2"  turntable, 
high-grade  crystal  pick-up,  walnut  cabinet. 
Write  for  complete  story. 

NEW    NEEDLE    DISPLAY 


k  i  o  j  i 


IOl%»ftonveoc«.Need£e~  -.-. 
.  iuTif&e  rtotAs  netj&5t&&  ~mmmum 
ujeaJloit'tta  •tetfid-  fet  u4  dewotisWe 


Increase  needle  sales  with  this  striking   full-color 

card.   A  different  display  for  a  different  needle. 

Samples  sent  on  request. 

Ask  also  about  Recoton  ACOUSTIC 

needles,   especially  for  Portable  and 

tilectric  Phonographs 

RECOTON  Corporation 

178  Prince  St         New  York  City 


ciety  have  established  that  more  than 
60  per  cent  of  those  who  buy  or  ac- 
quire the  inexpensive  type  of  record- 
player  are  in  the  market  for  more  ex- 
pensive combination  instruments  later. 
4.  The  distribution  of  musical  mer- 
chandise to  the  public  is  being  con- 
stantly improved.  More  and  better 
dealers  are  being  added  all  the  time. 
Dealers  and  distributors,  too,  are  con- 
tributing more  aggressive  promotional 
efforts.  In  addition,  we  are  conducting 
musical-merchandise  training  schools 
to  show  dealers  how  to  get  the  most 
out  of  the  tremendous  potentialities  in 
the  current  market. 


APPRECIATION  OF  CLASSICS 

By  B.  Abrams,  President 
Emerson  Radio  &  Phonograph  Corp. 

The  ever-growing  public  apprecia- 
tion of  the  classics  and  the  desire  to 
preserve  special  renditions  of  music 
and  voice — and  to  have  them  available 
at  all  times — are  important  factors  in 
the  re-development  of  radio-and-phono- 
graph  business. 

Sales  of  Emerson  radio-and-phono- 
graph  combinations  have  been  increas- 
ing for  several  years  back  and  the 
business  made  exceptional  strides  dur- 
ing the  past  year.  Emerson  is  pro- 
ducing a  number  of  different  models 
this  year,  at  prices  rangitag  from 
!fl9.95  to  $219.95,  some  of  them  incor- 
porating the  automatic  record  changer. 

We  are  stressing  combinations  in 
our  literature,  our  cooperative  adver- 
tising and  in  our  national  campaign — 
giving  them  a  much  greater  propor- 
tion of  emphasis  than  ever  before.  It 
is  our  belief  that  the  trend  toward 
combinations  will  increase  as  time 
goes  on. 

INSTALL  TURNTABLE  LATER 

By   Frank    A.    D.   Andrea.    President 
Andrea  Radio  Corp. 

To  help  dealers  sell  customers  who 
balk  at  the  extra  initial  expense  of 
combinations,  Andrea  radio  consoles 
have  phonograph  compartments  in 
which  the  turntable  and  pick-up  can 
be  installed  at  any  time,  making  the 
console  into  a  genuine  combination  in- 
strument. Also,  we  have  an  Andrea 
radio  floor-plan  arrangement  by  which, 
from  three  samples,  dealers  can  demon- 
strate and  sell  eight  different  AC  mod- 
els, from  $111.00  to  $233.50,  including 
both  manual  and  automatic  combina- 
tions. 

PUSH  COMBINATIONS 

By    J.    M.    Marks,    General    Manager 
Fada    Radio    and    Electric    Company 

The  revival  of  interest  by  the  Ameri- 
can public  in  the  new  recordings 
prompt  Fada  to  include  six  radio- 
phonograph  combinations  in  the  1939 
Fada  line.  Table,  portable  and  console 
models  in  this  classification  from 
$39.95  to  $229.50.  Fada  radio-phono- 
graph combinations  will  have  a  promi- 
nent place  in  all  of  the  forthcoming 
sales  promotion  and  advertising  plans 
for  the  1939  Fada  line.  Publication 
advertising,  direct  mail,  displays  and 
cooperative  advertising  with  Fada 
dealers  and  distributors  will  frequently 
emphasize  combinations  during  the 
coming  season. 


RECORDS  THAT  EVERY 
HOME  SHOULD  HAVE 

(From    recent    such    lists    released     by     RCA    Victor) 

ROUMANIAN  RHAPSODY,  No.  1  ill  A  Major,  parts 
1  and  2,  by  the  Minneapolis  Symphony  Orchestra, 
Eugene    Ormandy,    conductor — 1701-1702. 

LUCIA  Dl  LAMMERM00R,  The  Mad  Scene  in  two 
parts,    by   Lily    Pons — 736!). 

AH,  SWEET  MYSTERY  OF  LIFE  and  'NEATH  THE 
SOUTHERN    MOON,   sung  by  Nelson  Eddy— 4281. 

T0SCA,  Te  Deum,  by  Lawrence  Tibhett  with  Met- 
ropolitan   Opera    Chorus — S124. 

FINLANDIA,  by  Philadelphia  Symphony  Ocbestra, 
Leopold   Stokowski,   conductor — 7412. 

CAPRICE  VIENN0IS  and  TAMB0URIN  CHINOIS, 
by  Fritz  Kreisler— 11690. 

CARNEVAL  OVERTURE,  by  Boston  "Pops"  Orches- 
tra,   Arthur   Fiedler,    conductor — 12159. 

PRELUDE  IN  C  SHARP  MINOR  and  SPINNING 
SONG,    by   Sergei   Rachmaninoff — 1326. 

TRAVIATA.  prelude  to  Act  1,  and  prelude  to  Act  2, 
by  the  Philharmonic  Symphony  orchestra  of  New  York, 
Al'turo   Toscanini,    conductor — 6994. 

AVE  MARIA  and  AUFTHALT,  sung  by  Marian  An- 
derson— 14210. 

0L'  MAN  RIVER,  sung  by  Paul  Hobeson.  and  AH 
STILL  SUITS  ME,  by  -Mr.  Robeson  and  Elisabeth 
Welch — 25376. 

RHAPSODY  IN  BLUE,  by  Paul  Hhiteinan  and  his 
orhcestra — 35822. 


CLASSICAL  FAVORITES 
FROM  DECCA 


UN  BEL  Dl  VEDREM0  (Some  Day  He'll  Come) 
from  "Madam  Butterfly"  and  LOVE  ME  FOREVER, 
sung  by  Grace  Moore — 29000. 

SYMPATHY  and  CAN  I  FORGET  YOU,  sung  by 
Richard  Timber — 2305D. 

M0USS0RGSKY  SONGS,  sung  by  Vladimir  Rosing 
with  piano  parts  by  Myers  Foggin  (6  records  will] 
booklet   and   album) — 29020-32. 

BEETHOVEN  SONATAS,  Nos.  5  and  9.  Violin- 
Simon  Goldberg.  Piano — Lili  Krauss.  {7  records)  — 
29026-32. 

D0HNANYI— SYMPHONIC  MINUETS,  played  by 
the  Queen's  Hall  Orchestra  led  by  George  Stratton. 
conducted  by  Sir  Henry  .1.  Wood  (2  records)  — 
29039-40. 

BRUCKNER— OVERTURE  IN  G  MINOR,  played  by 
Queen's  Hall  Orchestra  led  by  George  Stratton.  con- 
ducted by  Sir  Henry  J.  Wood   (2  records) — 29041-42. 

CONCERTO  FOR  VIOLA  AND  ORCHESTRA.  Fred- 
erick Riddle  with  the  London  Symphony  Orchestro 
conducted  by  William  Walton    (3  records)— 29043-43. 

SONGS  OF  FAMOUS  RUSSIAN  COMPOSERS,  sung 
by  Vladimir  Rosing    (5  records) — 29046-50. 


COLUMBIA   MASTERWORKS 

(Outstanding    Programs) 

FELIX  WEINGARTNER  and  WALTER  GIESEKING 
with  the  VIENNA  PHILHARMONIC  ORCHESTRA. 
playing  an  all  Beethoven  program:  Leonore  Overture 
No.  2  (X96),  Symphony  No.  3  (2S5),  Concerto  No. 
5    (243),  and  Symphony  No.   7    (260). 

EG0N  PETRI  and  JOSEPH  SZIGETI,  in  a  piano 
and  violin  recital:  Handel  Sonata  No.  4  (1709S  and 
99D).  Moonlight  Sonata  (X-77),  Brahms  Variations 
on  a  Theme  by  Paganini  (X-S0),  and  Brahms  Sonata 
No.    3    (324). 

SIR  THOMAS  BEECHAM  and  the  LONDON  PHIL- 
HARMONIC ORCHESTRA  playing  a  popular  program: 
Weber's  Per  Freischutz — Overture  (68986-D),  Mozart 
Symphony  No.  40  (316),  Brahms  Symphony  No.  2 
(265),  and  the  Wagner  overture  Die  Meistersinger 
(68S54-D). 

THE  PASQUIER  TRIO,  tile  ROTH  STRING  QUAR- 
TET and  AD0LPH  BLSCH  CHAMBER  PLAYERS  in  a 
chamber  music  concert:  Beethoven  Serenade  in  D 
Major  (341),  Beethoven  Quartet  in  F  Major  No.  1 
(256),  Bach's  Brandenberg  Concertos  Nos.  1,  2,  3 
and  4  (249),  and  Bach's  Brandenberg  Concertos 
Nos.    5   and  6    (250). 


48 


Radio  Today 


push-button 
TESTING 


THAT  IS  PROTECTED 
,  AGAINST 

OBSOLESCENCE 


FOR  1939  SERVICING 


Push  -  b  u  t  t  o 
Testing  must 
have  wide  flexi- 
bility to  safely 
guard  against  ob 
solescence.  Trip- 
lett  has  protected 
the  service  dealer 
with  an  unique 
circuit  together 
with  push-button 
individual  selec- 
tion    to     balance. 


Rotating 
Chart  Shows 
Correct  Buttons 
To  Push 


DYNAMIC 
MUTUAL 
CONDUCTANCE 


Model  1616 

*73?i 

Dealer  Price 
TUBE  TESTER  AND  VOLT-OHM-MILLIAM  AETER 


Miiny  misleading  names  Indicate  n 
Dynamic  Mutual  Conductance  Cir- 
cuit .  .  .  Triplett's  i«  n  true  dynamic 
mutual  conductance  tester  in  every 
■ense   of  the    word. 

Push-button  control  gives  n  new 
order  of  simplification.  The  buttons 
are  clearly  marked  on  chart  at  base* 
Junt  rotate  the  chart  to  the  tube  to 
be  tented — then  the  button  to  push  is 
Indicated  in  line  under  each  row  of 
push  buttons.   What  could  be  simpler? 

A  second  revolutionary  Improve- 
incut  is  the  arrangement  of  the  mens- 
urlng  circuit  of  the  dynamic  mutual 
conductance  iv*t  for  amplifiers  and 
power  tubes.  The  tube  tested  not  onl> 
shows  GOOD  or  UAU  but  the  percent- 
age of  iuu  to  the  100%  good  condition 
also  Is  indicated,  in  critical  sets  this 
permits  the  service  dealer  to  pick  his 
tubes  with  confidence.  .  .  .  Diodes  and 

SURE  TO  ENTER  TRIPLETT'S 


MODEL  1615 

•  Dynamic  Mutual  Conductance 
Tube  Tester  only  with  Push-Button 
testing.  Same  tube  tester  circuit 
and  push-button  panel  as  Model 
1616,  but  for  tube  testing  only. 
Dealer  Price   $63.34 

MODEL  1610 

•  Emission  Type  Tube  Tester 
with  Push-Button  testing.  Has 
new  R.M.A.  approved  circuit  with 
every  essential  for  dependable 
emission  test  on  all  type  tubes. 
Testing  greatly  simplified  by  Trip- 
lett  push-button  operations.  In- 
stalled in  metal  case  with  remov- 
able cover. 

Dealer  Price  $39.00 

MODEL  1611 

•  Emission  Type  Tube  Tester 
with  Push-Button  Testing  and 
Volt-Ohm-Milliammeter.  Similar  to 
Model  1610  above  described  except 
Volt  -  Ohm  -  Milliammeter  added. 
Ranges  similar  to  those  of  Model 
1616.  Complete  with  accessories. 
Dealer  Price   $49.50 


rectifiers  are  tested  for  emission  ac- 
cording to  the  latest  approved  engi- 
neering; standards.  Ballast  tube  con- 
tinuity test.     Gas  test   also    included. 

Rotute  chart  to  Voit-Ohm-MlllI- 
amiiteter  setting's — push  button  fori 
D.C.  scale i  O-J  0-50-250-500-1000  Volts 
at  lOOO  Ohms  per  Volt;  0-10-50-250 
M.A.I  .2  to  500  Ohms — 300,000  Ohms 
— 1  Vi  Megohms — .1  Megohms;  0-10- 
50-250-500-1000  A..C.  Volts  at  400 
Ohms  per  Voltj  decibel  chart  fur- 
nished lo  VZ  dli's.  (Ohnimeter  is  line 
powered.)  I'ses  two  interchangeable 
plug-In  type  rectifiers,  simplifying 
replacement  in  case  of  unintentional 
damage.  Replacement  rectifiers  are 
all   precalibrated  at   the   factory. 

Installed  in  attractive,  all-metal 
case  with  lustrous  finish.  Removable 
cover.  For  portable  or  counter  use 
.  .   .   sloping  panel. 

$500.00  RADIO  SERVICE  PUZZLER  CONTEST! 


Model 
1611 


P/ucuion 

ELECTRICAL    INSTRUMENTS 


September,  1938 


THE    TRIPLETT    ELEC.    INSTRUMENT    CO. 
100  Harmon  Dr.,    Glutl'ton,   Ohio 

Please    send    me    more    information    on 

□  Model  1616  □  Model   1615 

□  Model    1610  □  Model   1611 

□  Details  on   Radio  Service  Puzzler  Contest. 


Name     

Address    

City     state 


49 


'.''.>*«**•  f-j.'.,' 


PARTS  JOBBERS  NEED  HELP 

Manufacturers  asked  to  police  distribution 
Net  price     selling  is  proposed  in    radio 


Evils  of  the  radio-parts  jobbing 
business  were  discussed  by  A.  M, 
Hirsch  of  Los  Angeles,  Gal.,  on  pay*, 
22  of  Radio  Today  for  July,  expand- 
ing the  line  of  thought  already  de- 
veloped by  him  in  recent  addresses 
before  the  National  Parts  Distribu- 
tors group  and  the  Sales  Managers 
Club  at  Chicago. 

Further  discussion  on  the  needs  of 
the  parts  jobbing  situation,  by  other 
well-known  radio  distributors,  follow: 

LET  JOBBERS  MAINTAIN 
SUGGESTED  SCHEDULES 

By  R.  W.  D'emarest 
Radio  Supply  Co.,  Los  Angeles,  Cal. 

The  question  raised  by  the  Hirsch 
article  is  a  mooted  one  of  long  stand- 
ing, "Small  Profits  Realized  by  the 
Jobber." 

No  real  good  has  ever  come,  so  far 
as  we  know,  of  any  effort  to  improve 
the  condition.  Whether  the  present 
unsatisfactory  state  is  due  to  greed 
for  business,  or  lack  of  trust  in  one 
another  of  those  interested  in  attain- 
ing a  better  basis,  we  are  unwilling 
to  say. 

It  is  obvious  that  many  plans  could 
be  offered  to  create  a  more  substan- 
tial profit  to  the  jobber,  which  he  is 
certainly  entitled  to.  But  in  our 
opinion   the  simplest  and  most  effec- 


tive corrective  one  would  be  to  see 
all  jobbers  strictly  maintain  the  sug- 
gested discount  schedules  supplied  by 
reliable  manufacturers. 

Put  field  men  to  work 

The  manufacturers,  having  already 
provided  what  we  think  a  reasonable 
jobber  margin,  could  for  their  part 
be  of  great  help  by  possibly  more 
rigid  policing  of  their  lines  through 
their  field  men.  Further,  there  is  a 
one  hundred  per  cent  degree  of  sat- 
uration in  every  territory  throughout 
the  country,  and  if  all  merchandise 
could  be  distributed  through  proper 
jobber  connections  it  would  rebound 
to  the  benefit  of  the  manufacturer 
through  materially  cutting  expensive 
detail  he  is  now  compelled  to  assume, 
as  well  as  throw  a  greater  flow  of 
business  to  the  legitimate  and  prop- 
erly set  up  jobber. 

Also,  the  jobber  should  not  be 
called  upon  to  make  free  deliveries. 
This  has  become  a  vicious  and  ex- 
pensive cycle  in  competition.  The 
jobber  has  to  pay  the  freight  from 
the  factory  to  his  place  of  business, 
but  cannot  charge  the  expense  of  free 
delivery  to  his  customers  from  his 
place  of  business. 

This  subject  is  a  very  broad  one 
that  would  require  a  great  deal  of 
thought   and   work,   but   a    correction 


Nifty  new  home  of  the  Radio  Supply  Co.,  950  S.  Broadway,  Los  Angeles 


can  be  accomplished  if  everyone  con- 
cerned will  work  together  with  an 
open  mind,  fairness  and  honesty. 
Basically,  however,  we  feel  jobbers 
in  general  would  find  additional  profit 
and  satisfaction  if  they  retained 
their  normal  margin  and  refused  to 
give  it  away  as  a  means  of  getting 
additional  business. 

MANUFACTURERS  AND  DISTRIBS 
MUST  HELP 

By  E.  J.  Tydings,  Tydings  Company, 
Pittsburgh,  Pa. 
Vice-president  NRPDA 
The  major  evils  today  are  threefold: 

1  The  extension  of  distributors'  dis- 
counts by  manufacturers  to  con- 
cerns that  are  not  really  distribu- 
tors, but  only  large  service  organi- 
zations. 

2  The  lack  of  strict  supervision  by  the 
manufacturer  over  the  factory  rep- 
resentative who,  without  thought 
of  his  better  accounts,  sneaks 
around  the  corner  and  sells  at  dis- 
tributor prices  the  lines  his  main 
outlet  or  outlets  cannot  handle, 
thereby  setting  up  competition  that 
the  larger  distributor  cannot  meet, 
due  to  overhead,  policy,  etc. 

3  The  granting  by  the  manufacturer 
of  the  same  discount  regardless  of 
quantity  purchases,  thereby  placing 
the  larger  account  at  a  decided  dis- 
advantage. 

What  should  be  done 

1  The  manufacturer  should  make  all 
concerns  that  wish  to  be  listed  as 
parts  distributors  and  receive  dis- 
tributor discounts  measure  up  to 
certain  qualifications.  I  would  de- 
fine as  a  distributor,  one  who  does 
at  least  80  per  cent  of  his  business 
at  wholesale,  carries  adequate  stocks 
in  the  lines  he  distributes,  is  recog- 
nized by  at  least  ten  leading  parts 
manufacturers  as  a  distributor,  and 
does  no  service  work,  as  this  is  the 
main  subterfuge  used  as  a  wedge 
to  get  distributor  discounts. 

2  More  strict  factory  supervision  by 
the  manufacturer  over  the  factory 
representative. 

3  A  balanced  discount  schedule  giv- 

(Continued  on  page  67) 


50 


Radio  Today 


NEW  THINGS 


(Continued  from  page  32) 

1.4  volt  tubes 

*  Line  of  dry-cell  tubes  operat- 
ing from  1%  volt  battery.  Types 
available  are  1A5G  output  pentode, 
1A7G  pentagrid  converter,  1C5G 
output  pentode,  1H5G  triode  with 
single  diode,  1N5G  r-f.  pentode.  All 
types  operate  with  B  battery  of  90 
volts.  Ken-Rad  Tube  &  Lamp  Corp., 
Owensboro,  Ky. — Radio  Today. 


Low-priced  trouble  shooter 

*  DC  type  multirange  meter. 
Measures  0/5/50/500/1000  volts, 
0/1/10  milliamperes,  0/500/50M/ 
500M  ohms.  Weighs  only  24  ounces. 
Self-contained  dry  cells.  Model  432 
—net  $5.95.  Radio  City  Products 
Co.,  88  Park  Place,  New  York,  N.  Y. 
— Radio  Today. 


Table  type  cabinets 

*  Line  of  table  cabinets  for 
radio  sets  and  interphones.  Avail- 
able in  sizes  from  9%  inches  to  18 
inches  wide.  Packed  in  individual 
cases.  List  ?3.40  to  $7.  Edwin  I. 
Guthman  &  Co.,  400  S.  Peoria  St., 
Chicago,  111. — Radio  Today. 


Convertible  battery  radio 

*  Table  type  radio  for  battery 
and  AC  operation.  Tunes  down  to 
14  meters  in  3  bands.  Uses  5  tubes 
— vibrator  power  supply  for  6  volts. 
Rotary  switch  on  back  of  set  pro- 
vides instantaneous  change-over. 
Model  310-H.  Stromberg-Carlson 
Telephone  Mfg.  Co.,  100  Carlson  Rd., 
Rochester,  N.  Y. — Radio  Today. 


75-watt  rheostat 

■*  Potentiometer  type  rheostat 
with  75-watt  rating.  Vitreous  en- 
amel binds  entire  assembly  to  porce- 
lain core.  Shaft  and  bushing  insu- 
lated from  electrical  circuit.  Diam- 
eter of  2%  inches.  Tapered  wind- 
ings can  be  supplied.  Type  G.  Ohm- 
ite  Mfg.  Co.,  4835  Flournoy  St.,  Chi- 
cago, 111. — Radio  Today. 


All-wave  signal  generator 

+  Six-band  all-wave  test  oscilla- 
tor tuning  50-60,000  KC.  6E5  tube 
used  as  output  indicator.  400  cycle 
audio  modulation.  Cast  aluminum 
case  compartments  for  individual 
circuits.  Equipped  with  jack  to  op- 
erate with  oscilloscope.  Three-sec- 
tion attenuator  controls  both  high 
and  low  output.  Model  36-A.  Dayco 
Radio  Corp.,  Dayton,  Ohio — Radio 
Today. 


B  THE 

CApAC«OR  *** 


The  type  BR  "Blue  Beaver"  is  a  typical 
example  of  the  C-D  "experience-tested 
and  quality  built"  capacitor  line.  Her- 
metically sealed  and  vented,  they 
eliminate  drilling  of  chassis,  use  of  pal 
nuts  and  washers  as  well  as  minimize 
assembly  operations.  You'll  like  the 
results  you  get  from  C-D's  NEW  Blue 
Beavers. 


TYPE 

TJ-U 


Type  TJU  fireproof  Dykanol  transmitting 
capacitors  come  hermetically  sealed  in 
sturdy  steel  containers.  These  are  the  capaci- 
tors practically  every  broadcast  and  govern- 
ment station  in  the  world  uses  today.  Stand- 
ard equipment  too,  with  tens  of  thousands  of 
"hams"  who  will  buy  nothing  else  but  C-D 
Dykanol  units. 


CATALOG  NO.  161 
NOW  OFF  THE 
PRESS!  Have  You 

Enough  Copies? 


C-D  famous  "Dwarf-Tiger"  paper  tubu- 
lar capacitors  are  non  -  inductively 
wound  and  specially  sealed.  Extensively 
used  by  leading  set  manufacturers, 
C-D  has  produced  many  hundreds  of 
millions  of  these  tubulars — more  than 
any  other  company  in  the  world.  Type 
DT  is  a  real  quality  capacitor  at  the 
lowest  price  ever  offered. 


1)  ELECTRIC    CORPORATION 

1022    Hamilton  Boulevard,   South  Plaintield,  Sew  Jersey 


September,  1938 


51 


DYNAMIC   TESTING-PART   VIM 


DYNAMIC  CHECKING  OF  LOAD  IMPEDANCES 

The  effect  of  load  impedance  in  output  amplifiers  and 
how  to   detect   mismatching   of  the   load    in   triodes 


By  VINTON  K.  ULRICH 
Service  Editor 

Just  as  important  as  knowing  in 
what  stage  distortion  occurs  is  know- 
ing what  part  of  the  stage  is  respon- 
sible for  the  distortion.  Methods  of 
localizing  the  distortion  either  by  ear 
or  by  the  oscilloscope  were  described 
in  the  July  and  August  issues  of  Radio 
Today.  Also  in  the  August  issue  a 
series  of  tests  were  described  to  help 
the  serviceman  put  his  finger  on  the 
exact  cause  of  audio  frequency  dis- 
crimination or  amplitude  distortion  in 
audio  amplifiers. 

Because  so  few  servicemen  under- 
stand the  need  for  proper  load  imped- 
ances in  output  amplifiers,  this  month's 


L_ 

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J~ 

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inn 

V 

article  will  discuss  distortion  caused 
by  improper  load  impedances  and  de- 
scribe a  test  that  can  be  quickly  made 
on  triode  amplifiers.  While  it  may  ap- 
pear to  some  that  we  are  putting  un- 
due emphasis  on  the  subject,  recent 
discussions  with  servicemen  indicate 
the  need  for  this  material. 

The  basic  circuit  for  an  amplifier  is 
shown  in  Fig.  1-A.  When  simplified  it 
takes  the  form  of  1-B,  the  load  imped- 
ance of  the  tube  and  its  internal  im- 
pedance in  series,  with  a  hypothetical 
AC  source  having  a  value  equal  to 
the  grid  swing  Eli  multiplied  by  the 
amplification  factor  (^)  of  the  tube. 

The  grid  signal  takes  the  form  of  a 
sine  wave  (that  is  what  the  test  oscil- 


GRID    BIAS  =  —30  VOLTS 
SIGNAL  ON   _  28  VOLTS    PEAK 
GRID  19.6  VOLTS  R.M.S. 


INSTANTANEOUS 
GRID     VOLTAGES      -so 


r-Hl 

360° 

2; 

25" 

2; 

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5 

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; 

■ 

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•t — ' 

_ 

i 

a\ 

\ 

/ 

-V 

K 

^J 

>> 

7 

L 

' 

PLATE  TIED  TO 
AOJACENT  GRID 


UJ  R    =  1740 


o 

>    268  C 

280  ^ 
)               45             90"             135              V 

UJ 
H 
< 
_l 
0. 

/ 

kttfl 

^2 

MM 

m 

IV 

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— 7 

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160  J 

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INSTANTANEOUS 
PLATE  VOLTAGES 


Fig.  2 — Instantaneous  grid  and  plate  voltage  swings  in  a  vacuum  tube  amplifier. 
Note  that  while  the  plate  voltage  supply  is  268  volts,  the  plate  potential  instan- 
taneously drops  to  162  volts  and  rises  to  357. 


lator  delivers)  and  is  shown  in  Fig. 
2-A.  The  signal  has  a  peak  value  of 
28  volts  and  the  tube  has  a  negative 
grid  bias  of  30  volts.  The  curve  shows 
the  instantaneous  variations  in  grid 
potential  for  one  cycle.  Note  that  for 
any  instant,  the  grid  potential  is  the 
sum  of  the  signal  potentional  for  that 
instant  and  the  grid  bias.  When  the 
signal  is  28  volts  positive  (point  C) 
the  grid  potential  for  that  instant  is 
28  —30  or  —2  volts. 

Fig.  3  shows  the  family  of  charac- 
teristics of  a  typical  triode  type  tube. 
Point  0  is  the  operating  point  when 
no  signal  is  applied  to  the  tube.  The 
bias  is  — 30  volts,  the  plate  voltage  is 
268  volts  and  they  can  be  measured 
by  a  voltmeter  when  the  tube  is  in  the 
circuit. 

If  the  signal  shown  in  Fig.  2-A  is 
applied  to  the  grid  of  the  tube,  for 
point  A,  the  instantaneous  grid  voltage 
becomes  — 20  volts.  This  means  that 
the  instantaneous  operating  point  for 
the  tube  is  somewhere  along  the  curve 
for  "grid  voltage  equals  — 20  volts." 

Plate  load  explained 

From  the  curves-j-  shown  in  Fig.  3 
and  previous  knowledge,  it  is  obvious 
that  if  the  grid  voltage  is  changed,  the 
plate  current  will  also  change.  As  the 
grid  voltage  becomes  more  positive 
(less  negative),  the  plate  current  rises. 
Since  originally  a  potential  of  268  volts 
was  on  the  plate,  and  the  plate  current 
has  increased,  it  follows  that  there  is 
an  additional  voltage  drop  through  the 
plate  load  resistor  or  impedance  be- 
cause of  the  increased  current.  If  it 
is  known  that  a  plate  load  of  3400 
ohms  is  employed,  one  would  expect 
that  each  additional  10  mils  of  plate 
current  would  cause  an  additional  34 
volts  drop  across  the  load  resistor.  (By 
Ohms  Law:  E  =  3400  x  -010  =  34.) 

Knowing  that  each  10  mil  change 
causes  a  34  volt  drop,  one  can  draw 
in  a  line  through  point  O  with  a  slope 
that  satisfies  the  stated  condition. 
Where  that  line  intersects  the  curve 
for  — 20  volts  on  the  grid  is  point  A, 
which  is  for  230  volts  on  the  plate  with 
a  current  of  46  mils.  Point  O  is  268 
volts  and  35  mils.  The  change  is 
11  mils  and  38  volts.  By  Ohms  Law 
that  means  approximately  a  3400  ohm 
resistance,  which  is  a  check  on  the 
work  above. 

Having  determined  the  position  of 
the  load  line  on  the  family  of  tube 
characteristics,  the  grid  swing  can  be 
traced  on  the  curves  as  shown  by 
points  B,  C,  and  —A,  — B,  — C,  all  of 
which  must  lie  on  the  load  line.     (The 


52 


Radio  Today 


Fig.   1 — Basic  circuit  of  a  power  am- 
plifier. 

load  line  shown  is  any  one  of  an  in- 
finite number  that  could  be  taken.) 
The  purpose  of  drawing  the  load  in  is 
to  determine  on  what  part  of  the  char- 
acteristics the  tube  is  operating.  Opera- 
tion along  this  line  is  the  dynamic 
operation  of  the  tube.  The  voltage 
changes  across  the  load  resistor  are 
those  voltages  observed  on  the  cathode 
ray  oscilloscope.  Note  that  the  plate 
voltage  instantaneously  drops  to  162 
volts  for  point  C  and  rises  to  357  for 
— C. 

Voltage  induced  in  plate  load 

The  tube  can  be  thought  of  as  a  de- 
vice in  which  the  plate  current  is  con- 
trolled by  the  grid  potential.    Then  the 


change  in  plate  current  induces  or 
causes  a  change  in  the  voltage  across 
the  load  impedance.  Since  the  voltage 
is  dependent  not  only  upon  the  change 
in  current,  but  the  value  of  the  load 
impedance,  the  significance  of  the  load 
becomes  apparent.  With  zero  load  im- 
pedance, there  just  isn't  any  voltage 
output — and  consequently  the  power 
output  is  also  zero. 

By  taking  the  points  0,  A,  B,  C, 
— A,  — B,  — C  along  the  load  line  in 
Fig.  3  and  plotting  them  for  grid  volt- 
age vs.  plate  current,  the  result  is  the 
dynamic  characteristic  shown  in  Fig. 
4.  Note  that  no  plate  voltage  is  stated, 
since  the  plate  voltage  is  not  constant. 
This  dynamic  characteristic  is  some- 
what easier  to  follow  since  there  is 
only  one  curve  to  consider,  but  it  is 
good  for  only  one  specific  value  of  load 
impedance.  The  variations  in  grid 
voltage  are  projected  up  to  the  Eff — I 
curve  in  the  usual  manner  and  then 
projected  to  the  right  for  the  plot  of 
change  in  plate  current. 

Dynamic  tube  characteristic 

Contrary  to  what  some  servicemen 
believe  and  to  curves  shown  in  the  cur- 
rent radio  press,  this  dynamic  charac- 
teristic is  a  straight  line  for  small 
values  of  both  positive  and  negative 
grid  voltages.  The  bend  that  occurs 
is  in  the  vicinity  of  plate  current  cut- 
off, which  occurs  for  high  values  of 
negative  grid  bias. 

The  instantaneous  values  of  plate 
voltage  can  be  calculated  from  Fig.  4 
by  multiplying  the  change  in  plate 
current  (upper  "sine"  wave)  by  the 
value  of  load  resistance.  Since  we  also 
have  this  information  on  Fig.  3,  we 
have  taken  it  and  plotted  it  point  by 
point  as  shown  in  Fig.  2-B. 

In  the  May  issue  of  Radio  Today  on 
pages  30  and  31  there  was  a  discussion 
of  how  the  tubes  cause  distortion,  and 
it  pointed  out  that  various  loads  on 
the  tube  required  various  operating  po- 
tentials. Conversely,  if  the  plate  and 
grid  voltage  on  the  tube  are  estab- 
lished,  there   is  an  optimum  value   of 


load  resistance  for  maximum  power 
output  with  minimum  distortion. 

Figs.  5,  6,  and  7  show  three  differ- 
ent values  of  load  impedance  for  the 
same  values  of  grid  bias  and  plate  volt- 
age. No  load  condition  with  the 
speaker  voice-coil  circuit  opened  is 
shown  in  Fig.  5.  The  actual  value  of 
this  load  is  about  30,000  to  50,000  ohms 
since  the  output  transformer  has  some 
losses,  even  under  no  load.  Note  that 
for  full  swing  of  the  grid,  a  very  high 
plate  voltage  swing  is  obtained. 
(Points  A  and  B  in  these  figures  refer 
to  maximum  and  minimum  values  of 
grid  swing.) 

When  the  load  impedance  is  equal 
to  the  plate  impedance,  the  voltage 
across  the  load  or  plate  swing  is  much 
less  as  shown  in  Fig.  6.  In  fact,  by 
referring  to  Fig.  1-B  and  using  Ohms 
Law,  one  finds  that  if  RL  were  many 
times  greater  than  R  ,  practically  all 
the  applied  voltage  would  appear 
across  RL.  If  RL  equaled  Ro,  then 
only  half  of  the  voltage  would  appear 
across  RL.  This  phenomenon  is  pre- 
dictable from  the  characteristic  curves 
and  is  also  measurable  at  the  radio  set. 

No  food  vs.  open  circuit  voltages 

With  Class  A  triode  type  amplifiers, 
it  then  becomes  practical  to  make 
measurements  of  the  plate  load  imped- 
ance by  taking  measurements  of  the 
voice  coil  voltages  on  no  load  and  with 
a  load.  In  order  to  eliminate  the  pos- 
sibility of  distortion  at  high  levels 
affecting  the  accuracy  of  the  measure- 
ments, the  grid  signal  is  limited  to  a 
small  value,  as  indicated  by  X  and  Y 
on  Figs.  5,  6,  and  7.  Note  in  Fig.  6, 
which  would  give  high  distortion  at 
full  grid  swing,  that  the  curves  for 
high  grid  voltages  become  closer  to- 
gether in  the  region  of  point  B.  In 
other  words,  the  length  A — O  and 
O — B  are  not  equal  in  Fig.  6  and  for  a 
full  grid  swing,  one-half  of  the  output 
wave  would  be  greater  than  the  other. 

By  reducing  the  swing  to  one-third 
or  one-quarter  of  its  full  value,  the 
(To  page  56) 


Fig.  3 — The  slope  of  the  straight  line  is  equal  to  the  plate  road  resis- 
tance. Plate  voltage  and  plate  current  swing  can  be  obtained  from 
these   curves. 


Fig.  A — The  dynamic  characteristic  is  obtained 
by  plotting  the  points  A,  B,  C,  O,  —A,  — B,  — C 
from   Fig.   3.     Points   correspond   with   Fig.   2. 


September,  1938 


Beware!  Instruments  without 
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gross  inaccuracies.  Read  rite  has 
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since  1904.  There  are  no  Readrite 
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MODEL  431 $15.90 

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RSA  CHICAGO  CHAPTER  TO  HOLD 
TEST  EQUIPMENT  SHOW 

The  Chicago  Chapter  of  RSA  an- 
nounces a  test  equipment  show  and 
round  table  discussion  to  be  held  at 
1he  Stevens  Hotel  in  Chicago,  Sep- 
tember 28th.  All  of  the  outstanding  test 
equipment  manufacturers  have  sig- 
nified their  intention  of  participating" 
in  this  opening  meeting  of  the  1938 
Fall  season.  Such  outstanding  fig- 
ures in  the  industry  as  Mr.  John  F. 
Rider,  Mr.  Walter  Weiss,  Mr.  O.  J. 
Morelock,  Mr  Paul  Jackson,  and 
many  others  who  have  been  con- 
tacted have  signified  their  intention 
of  participating. 

Newark — The  first  annual  outing 
of  the  Radio  Servicemen  of  New 
Jersey  was  held  at  Farchers'  Grove, 
Union,  N.  J.,  on  August  21st.  More 
than  .fifty  radio  servicemen  attended. 
For  our  first  meeting  in  September, 
Chairman  Rauber  will  address  the 
group  on  "How  to  Increase  Your  In- 
come by  Servicing  Allied  Appli- 
ances." 

Decatur — -The  Decatur  Chapter  of 
RSA  has  started  a  series  of  round 
table  discussions,  using  a  different 
subject  each  week,  at  which  each 
member  turns  in  a  brief  written 
statement  of  his  personal  views. 
These  are  discussed  at  the  meeting. 
We  expect  to  have  a  test  equipment 
lecture  the  latter  part  of  September 
by  Mr.  Walter  Weiss  of  Hickok. 

Fremont — On  August  2  2nd  Mr. 
Mohaupt  of  Radio  Training  Assn.  ad- 
dressed the  Fremont  Chapter  on  the 
use  of  the  signal  generator  in  ser- 
vice work.  A  large  turnout  was 
present  and  everyone  felt  he  had 
gained  something  from  the  meeting. 


BIGGEST  ADV.  CAMPAIGN 
IN  EMERSON  HISTORY 

Starting  in  October  issues  of  such 
top-flight  magazines  as  American 
Weekly,  Saturday  Evening  Post,  Col- 
lier's, Life,  Esquire,  the  Emerson  Ra- 
dio and  Phonograph  Corporation  is 
planning  the  most  intensive  and  ag- 
gressive advertising  and  sales  promo- 
tion program  in  its  history.  Featuring 
all  of  the  new  1939  models,  from 
$9.95  to  $219.95— in  full-page,  full-color 
advertisements  in  some  publications, 
with  liberal  sized  space  in  others — the 
campaign  is  designed  still  further  to 
augment  the  growing  popularity  of 
Emerson  in  all  markets. 

Supplementing  the  magazine  adver- 
tising, there  will  be  a  vigorous  cam- 
paign in  local  newspapers,  with  tie-in 
copy,  together  with  new  window  and 
store  displays.  A  series  of  illustrated 
broadsides,  bulletins  and  other  promo- 
tion is  being  planned  for  the  trade. 
Divisional  distributor  and  salesmen 
meetings  will  be  held  at  intervals 
throughout  the  intensive  campaign 
period. 

Commenting  on  the  campaign's 
1938-39  promotion  plans,  Mr.  Max 
Abrams,  treasurer  of  Emerson,  stated 
that  "although  sales  for  the  entire 
1939  Emerson  line  have  already  ex- 
ceeded all  expectations,  we  are  going 


ahead  with  our  campaign  in  keeping 
with  our  agreements  with  Emerson 
distributors  and  dealers.  Because  of 
the  new  styling,  the  new  values,  which 
our  mass  production  has  made  pos- 
sible, Emerson  is  in  a  stronger  posi- 
tion than  ever  before  to  capitalize  the 
second-,  third-  and  fourth*-set-to-a-home 
market.  We  have  every  reason  to  be- 
lieve that  this  campaign  will  greatly 
stimulate  such  additional  sales  for  the 
trade." 

Complete  details  (of  Emerson's 
1938-39  advertising  campaign  will  be 
furnished  to  dealers  by  Emerson  dis- 
tributors. 

RHINE  PLANS 
'SUPER-SERVICE'  GROUP 

Arthur  E.  Rhine,  well-known  leader 
in  the  New  York  radio-service  field,  is 
planning  a  new  service  organization, 
to  operate  under  a  well-advertised 
name  in  the  metropolitan  territory. 
Individual  service  men  who  co-operate 
will  be  enabled  to  retain  their  own 
identity,  but  will  benefit  from  im- 
proved locations,  broadcast  advertis- 
ing, increased  volume,  lowered  over- 
head, and  quantity  production,  accord- 
ing to  the  announcements. 

"Radio  men  who  have  long  been 
seeking  some  method  by  which  the 
radio  repair  business  can  be  made  to 
pay  returns  appropriate  to  their  ex- 
perience and  efforts  required,  should 
investigate  this  plan,"  comments  Mr. 
Rhine,  whose  own  business  headquar- 
ters are  at-  158  W.  230th  St.,  New 
York,  N.  Y. 

NEW  WESTERN  MANAGER 
FOR  RADIO  TODAY 


Dick  Fitzpatrick 

Richard  (Dick)  Fitzpatrick  has  been 
appointed  western  manager  of  Radio 
Today,  with  headquarters  at  201  N. 
Wells  Street,  Chicago.  Mr.  Fitzpatrick 
was  formerly  in  the  eastern  territory 
for  the  W.  P.  Woodall  Company,  which 
manages  and  operates  the  direct-mail 
lists  of  Radio  Today.  He  will  continue 
to  represent  the  Woodall  lists  in  Chi- 
cago. 


54 


Radio  Today 


RCA  Victor 

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September,  1938 


55 


Fig.  5 — A  plate  load  of  30,000  ohms  is  shown  by  the  straight 
line  A-B.     This  is  for  open  circuit  conditions. 


Fig.  6— When  the  plate  load  is  equal  to  the  plate  resistance,  the 
load  line  has  the  same  value  of  slope  as  the  tube  characteristic. 


operation  is  limited  to  a  fairly  linear 
range.  In  Fig.  6  (which  is  for  plate 
load  equals  tube  impedance)  for  a  10 
volt  grid  swing,  the  plate  swing  is 
268  —237  or  31  and  292  —268  or  24. 
Averaging  these  two  voltages,  the  peak 
output  is  27%  volts. 

In  Fig.  5  for  no  load  the  output  is 
268  —215  or  53  and  320—268  or  52.  The 
average  is  52%  volts  peak;  27 y2  is  ap- 
proximately one-half  of  that  figure.  As 
stated  in  a  previous  paragraph,  it  is  to 
be  expected  that  the  voltage  will  be 
one-half,  when  the  load  is  equal  to  the 
internal  impedance  of  the  tube. 

Proper  food  for  triodes 

When  the  load  is  equal  to  approxi- 
mately two  or  two  and  one-half  times 
the  internal  impedance  of  tfie  Kibe, 
which  is  about  the  right  ratio  for  most 
triode  amplifiers  operating  in  Class  A, 
the  voltage  under  load  should  be 
around  two-thirds  of  the  no  load  value. 
This  condition  is  shown  in  Fig.  7. 
268  —230  is  38  and  305  —268  is  37, 
which  gives  an  average  of  37%.  This 
voltage  is  roughly  70  per  cent  of  the 
no  load,  so  for  all  practical  purposes  it 
can  be  stated  that  with  proper  load 
matching,  the  load  voltage  will  be  two- 
thirds  of  the  no  load  voltage. 

These  voltage  measurements  referred 
to  above  can  be  taken  either  across 
the  secondary  of  the  transformer  or 
the    primary.      Because    of    the    lower 


power  required  to  operate  the  volt- 
meter* at  low  voltages,  the  secondary 
connection  is  preferable — also  the  use 
of  the  DC  voltage  blocking  condenser 
is  unnecessary  in  the  voice  coil  cir- 
cuit. 

The  signal  input  to  the  tube  should 
be  somewhere  in  the  vicinity  of  400 
cycles,  although  1000  cycles  will  prob- 
ably be  okay  with  most  sets. 

Should  the  voltage  be  greater  than 
two-thirds,  it  means  that  a  higher 
value  of  load  resistance  is  being  used. 
Since  with  triodes,  higher  load  imped- 
ances give  less  distortion  with  but  a 
slight  reduction  in  power  output,  a 
voltage  under  load  which  is  slightly 
greater  than  two-thirds  is  not  worth 
getting  disturbed  about.  Note  in 
Fig.  8  that  for  increasing  plate 
loads,  the  distortion  falls  off  very  fast 
while  the  output  power  drops  off  more 
slowly. 

Because  push-pull  operation  of  a 
stage  causes  cancellation  of  the  even 
harmonics,  push-pull  stages  often  use 
lower  values  of  plate  load  impedance 
than  do  single-ended  output  amplifiers. 
This  factor  should  be  taken  into  ac- 
count when  making  measurements. 

Class  A  output  plate  current 
not  constant 

While  on  the  subject  of  Class  A  am- 
plifier operation,  it  might  be  well  to 
correct    some    misunderstandings   that 


are  easily  made.  For  distortionless 
(0  per  cent)  operation  the  plate  cur- 
rent of  a  Class  A  amplifier  should  re- 
main constant.  However,  in  radio  set 
output  amplifiers  there  is  no  such 
thing  as  distortionless  output — as  a 
result,  the  plate  current  of  an  output 
Class  A  amplifier  will  not  remain 
steady  when  the  signal  is  adjusted 
from  no  output  to  full  output. 

The  proof  of  this  statement  is  easily 
shown  by  an  inspection  of  the  tube 
characteristics  in  Fig.  3,  which  has  a 
load  for  normal  operation.  Note  that 
the  length  of  C  to  O  is  greater  than 
the  length  from  O  to  — C.  This  means 
that  the  positive  peak  of  the  plate  cur- 
rent is  greater  than  tne  negative. 
The  positive  plate  current  swing  is  66 
— 35  or  31.  The  negative  peak  is  35 
— 9  or  26.  Since  the  upward  swing 
is  greater  than  the  downward  swing, 
the  average  plate  current  during  full 
output  must  rise.  This  rise  in  plate 
current  may  be  5  to  8  per  cent  with 
single-ended  Class  A  output  ampli- 
fiers. With  push-pull  amplifiers  the 
increase  is  even  more. 

Even  though  only  5  to  7  per  cent  dis- 
tortion is  present,  the  plate  current 
will  not  remain  steady  from  no  output 
to  full  output.  This  is  true  for  both 
triodes  and  pentodes.  Examination  of 
Figs.  5,  6,  and  7  will  show  that  as  the 
plate  load  impedance  is  decreased,  the 
negative  plate  current  peak  becomes  a 


Fig.  7 — Plate  load  is  equal  to  twice  the  plate  impedance 

of  the  tube.    Note  that  the  voltage  swing  is  greater 

than  in  Fig.  6. 


56 


Fig.  8 — Power  output  drops  off 
more  slowly  than  harmonics 
as  the  plate  load  is  increased. 


Fig.  9 — The  power  output  varies 
almost  as  the  square  of  the  plate 
voltage. 


Radio  Today 


smaller  percentage  of  the  positive 
peak,  even  for  constant  values  of  plate 
voltage  and  grid  bias.  Therefore,  for 
low  values  of  plate  load  impedance 
with  triodes,  a  greater  rise  in  plate 
current  will  be  observed  at  full  out- 
put. 

In  the  case  of  Class  A  voltage  ampli- 
fiers which  have  a  very  high  value  of 
load  impedance,  illustrated  in  Fig.  5, 
the  plate  current  will  very  nearly  stay 
steady  up  to  the  full  capacity  of  the 
tube  because  operation  is  limited  to 
the  very  nearly  linear  part  of  the  tube 
characteristic. 

Lest  the  serviceman  get  too  worried 
about  load  resistances,  it  must  be 
pointed  out  that  in  voltage  amplifiers 
there  is  no  such  thing  as  matching  the 
load  to  the  tube  for  maximum  power 
output,  since  power  output  is  unim- 
portant —  it  is  voltage  output  that 
counts.  As  explained  before,  high  volt- 
age output  is  obtained  by  high  load 
impedance. 

While  one  talks  of  matching  the  load 
impedance  to  the  tube,  the  serviceman 
should  not  get  the  idea  that  the  word 
"matching"  means  making  it  equal.  In 
no  instance  is  the  load  equal  to  the 
plate  impedance  for  proper  operation. 

This  discussion  on  matching  imped- 
ances has  been  in  reference  to  triode 
type  tubes.  Pentodes  will  be  discussed 
later  and  alternative  methods  of  check- 
ing for  proper  load  impedances  de- 
scribed. 


t  Tube  characteristics  by  courtesy  of  Radio- 
tron   Div.,   RCA   Mfg.   Co. 

*  A  ^high-resistance  AC  voltmeter  having  a 
multiplicity  of  ranges  is  especially  desirable  for 
these  tests.  The  Weston  765  unit  used  has 
ranees  of  IK,  3,  6,  15,  30,  60,  150,  etc.,  to 
1500. 

USE  MIDGET  ELECTROLYTIGS 
WITH  DISCRETION 

A  word  of  caution  regarding  the  lat- 
est midget  metal-can  electrolytics  is 
sounded  by  Charley  Golenpaul,  Aero- 
vox  sales  executive. 

"Please  get  this  straight:  the  midget 
metal-can  electrolytic  is  not  a  cure-all. 
It's  got  a  place  in  servicing  AC-DC 
sets,  where  dollars  as  well  as  space  are 
limited.  But  when  it  comes  to  larger 
sets,  particularly  costly  consoles,  go 
easy  on  the  use  of  midget  electrolytics. 
They  may  be  used  for  by-pass  func- 
tions. But  when  it  comes  to  filter  cir- 
cuits, particularly  the  first  condenser 
following  rectifier,  it  isn't  wise  to  stick 
in  a  midget.  After  all,  these  tiny  jobs 
haven't  the  foil  area,  electrolyte  and 
can  size  for  dissipating  the  heat  of 
heavy-duty  service.  You  can't  expect 
them  to  do  the  same  work  as  the  full- 
sized  electrolytics. 

"Then  there's  another  angle.  The  set 
owner  who  finds  one  of  these  tiny  elec- 
trolytics in  place  of  the  original  large 
condenser,  can't  help  but  feel  uneasy. 
He  doesn't  understand  how  the  same 
working  voltage  and  capacity  can  be 
crammed  into  such  a  small  can.  There- 
fore, he  jumps  to  the  conclusion  that 
he's  been  gypped,  and  the  serviceman 
has  a  dissatisfied  customer  on  his 
hands. 

"I  speak  from  first-hand  experience. 


The  Rider  Chanalyst  Provides 
The  *7cLAjbeAA  Method  of 
Trouble-Shooting  Ever  Devised 


JOHN  F.  RIDER 

in  whose  Successful 
Servicing  Labora- 
tories this  revolu- 
tionary instrument 
was  developed. 


Speed  saves  time — and  time  means  money  in 
any  business!  In  radio,  the  serviceman  who 
does  faster  work  leaves  his  competition  'way 
behind.  The  Rider  Chanalyst  provides  you 
with  a  method  of  testing  that  is  fast  because 
it  is  logical.  Being  of  fundamental  design  the 
Chanalyst  enables  you  to  trace  the  passage 
of  the  signal  from  antenna  to  ground  and 
localize  troubles  in  any  single  part  of  the  re- 
ceiver. It  permits  a  method  of  testing  offered  by 
no  other  single  servicing  instrument  ...  It  is 
the  one  instrument  every  progressive  service- 
man will  want  to  own.  See  the  Rider  Chanalyst 
in    actual    operation,    go    to   your   jobber    for    a 


demonstration.  You'll  see:  How  any  check  of 
the  receiver  is  made  simply  by  placing  the 
proper  probe  at  the  point  under  test  .  .  .  how/ 
you  can  determine,  almost  immediately,  the 
conditions  existing  at  any  point  .  .  .  how  you 
can  "move"  through  the  receiver  as  fast  as 
you  can  switch  the  probel  Whatever  you  want 
to  check — grid,  plate,  cathode,  resistor,  con- 
denser, coils,  voltage,  wattage — all  you  do  is 
apply  the  probes,  without  adaptors  or  plugs 
and.  quick  as  a  wink,  trouble  is  located.  You 
check  every  point  accurately,  no  guess  work,  no- 
doubt,  no  waste  motions.  See  the  Rider  Chanalyst 
at  your  distributors — operate  it  yourself. 


HOLD    EVERYTHING 

UNTIL  YOU  READ  ABOUT  THE  CHANALYST 


7"i 


*IQQ  16  Page  Booklet 

Tells  everything  you  want  to  know  about  the  Rider 
Chanalyst  .  .  .  what  it  is,  what  it  does,  how  it  works. 
Profusely  illustrated  with  diagrams  and  clear  ex- 
planations. This  booklet  was  written  by  John  F. 
Rider  in  whose  Successful  Servicing  Laboratories 
the  Chanalyst  was  developed.  Send  for 
your  copy  immediately.  Go  to  your  jobber 
lor  a  demonstration. 

SERVICE  INSTRUMENTS,  Inc. 

404    FOURTH    AVE.,    NEW    YORK    CITY 


|  SERVICE     INSTRUMENTS,     INC 
"14   Fourth  Avenue,   New  York   City 


r^niDEH 

Chanalyst 


NOW  READY 
FOR  DELIVERY 


September,  1938 


57 


SERVICE  NOTES 


Some  time  ago  we  introduced  an  8-mike 
450-volt  electrolytic  an  incli  or  so 
shorter  than  the  usual  job.  We  thought 
servicemen  would  like  this  smaller  can. 
Instead,  servicemen  ran  into  customer 
kicks.  Set  owners  didn't  think  the 
smaller  unit  could  he  as  good.  They 
felt  cheated. 

"So  again  I  say,  go  easy  on  those 
midget  electrolytics.  Use  them  with 
due  discretion,  both  from  the  technical 
and  the  business  angles." 

DYNAMIC  TESTING  OF 
RADIO  TUBES 

*  In  Radio  Today's  first  article  out- 
lining dynamic  radio  servicing  in  Feb- 
ruary, 1938,  it  was  stated  that  the 
most  significant  test  for  a  radio  tube 
is  in  its  socket  in  the  radio  set.  In 
other  words,  after  a  preliminary  test 
in  a  tube  checker  shows  that  there  are 
no  serious  defects,  it  is  well  to  check 
operation  of  the  tube  in  the  set  by  sub- 
stituting a  new  tube  or  tubes  for  the 
old  one.  In  this  way  tubes  in  critical 
circuits  can  be  carefully  checked. 

Right  in  line  with  this  idea  is  the  fol- 
lowing paragraphs  taken  from  the 
Technical  Section  of  the  Sylvania  Neics 
for  May-June.  While  the  excerpt  is 
from  an  article  pointing  out  the  need 
of  better  correlations  between   testing 


Schematic   of  the   Transitone   TH-1.      Note    use   of  separate   rectifier   section   to 
excite  field  coil  of  speaker. 

methods  and  equipment;    we  feel  that        It  was  discovered  that  some  27's  worked 


it  points  out  emphatically,  that  after 
all  the  real  test  is  in  the  set — or  a 
dynamic  test.  Here's  what  Sylvania 
says: 

"In  1929  and  1930  the  use  of  type  27 
as  a  bias  detector  was  quite  common. 


better  that  others  in  certain  applica- 
tions. Investigation  showed  that  there 
were  over  fifty  different  sets  of  oper- 
ating conditions  that  the  27  had  to 
meet  in  biased  detector  service.  Tubes 
which  were  satisfactory  in  one  circuit 


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"The  new  Packard  price  of  $7.50,"  said  a  dealer  the  other  day, 
"is  an  act  of  merchandising  genius.1" 

A  moment's  thought — and  you'll  agree.  For  now  Packard  is  the 
only  recognized,  established,  top-quality  shaver  available  any- 
where near  its  price.  The  nation  knows  Packard — knows  it  always 
sold  for  $15.  Feature  Packard  at  this  new  price!  And  the  thou- 
sands of  men  in  your  community,  who  have  always  wanted 
Packards  but  couldn't  afford  $15,  will  flock  to  your  store.  Order 
through  your  jobber. 

REGULAR   DISCOUNTS   CONTINUE 
On  orders  of  one  to  five  shavers,  33  1/3%.      On   orders   of  six  or  more   shavers,  40%. 

PROGRESS  LEKTRO  SHAVE  CORP.,  521  Fifth  Ave.,  New  York  City 

Canadian   Disi.   Progress   Corp.    t Canada)   Ltd.,  55  York  Ch,  Toronto,  Can. 


AC  or  DC 


58 


Radio  Today 


were  not  as  good  in  others.  Yet  all  of 
these  tubes  met  normal  specifications 
for  type  27.  In  later  years  a  similar 
situation  has  arisen  in  the  use  of  type 
36  as  an  autodyne. 

"It  is  frequently  necessary  to  try  out 
several  tubes  before  finding  one  that 
would  give  satisfactory  performance 
in  a  certain  receiver,  yet  the  "unsat- 
isfactory" tubes  will  work  well  in  some 
other  circuit  with  different  require- 
ments. It  is  obvious,  from  these  ex- 
amples, that  although  tubes  test  nor- 
mal there  are  occasions  when  a  selec- 
tion must  be  made." 

SLIPPAGE  OF  DIAL  DRIVE 

Where  a  tuning  knob  rotates  with- 
out positive  drive  to  the  dial  Strom- 
berg-Carlson's  service  department  sug- 
gests the  following: 

(a)  Check  gang  condenser  against  ob- 
structions hindering  movement  or 

(b)  Loosen  drive  assembly  screws  and 
shift  drive  assembly  toward  dial 
disc  as  far  as  screw  holes  will  per- 
mit, or 

(c)  Check  dial  disc  for  rubbing  or 
binding  against  dial  pan,  or 

(d)  Replace  dial  drive  if  none  of  above 
are  effective. 

When  the  vernier  tuning  knob  binds 
or  sticks  it  usually  indicates  that  ver- 
nier knob  has  been  pushed  too  far  onto 
shaft  or  that  large  tuning  knob  is  not 
far  enough  on  shaft,  causing  knobs  to 
rub  together. 

NEW  CATHODE-RAY  TERMS 

*  The  rapidly  expanding  cathode- 
ray  art,  particularly  as  it  gets  into 
television,  is  building  up  a  language 
all  its  own.  Leonard  F.  Cramer,  sales 
engineer  of  the  Allen  B.  DuMont 
Labs.,  Inc.,  Upper  Montclair,  N.  J., 
supplies  the  following  new  terms  and 
their  meaning,  for  the  enlightenment 
of  radio  workers: 

Oscillotron — A  cathode-ray  tube  for 
oscillograph   work. 

Teletron — A  cathode-ray  tube  for 
television   work. 

Phasmajector — Meaning  image  emit- 
ter or  a  tube  which  provides  a  stand- 
ard video  signal  source  to  aid  tele- 
vision experimentation. 

Electromalux — Meaning  electric  eye 
or  a  photo-electric  mosaic  pick-up  tube 
for  television  camera  work. 

These  terms  and  more  to  follow, 
have  been  derived  from  the  Greek  and 
the  Latin,  and  are  coming  into  general 
use  to  cover  the  essentials  of  the  com- 
mercialized cathode-ray  art. 

ARVIN  STATION  VARIATOR 

In  one  of  the  current  Arvin  auto 
radio  sets,  a  device  known  as  the  sta- 
tion variator  is  employed  to  permit 
selection  of  stations  outside  the  usual 
range  of  push-button  trimmers,  since 
the  set  does  not  have  a  tuning  con- 
denser for  manual  tuning. 

The    circuit    accompanying   this    de- 


MY  STARTLING   IPO  LUCY: 


GENEROMETER     is    a    tightly-shielded     signal     generator    of    ex- 
tremely attractive  appearance.    The  controls  are  band  switch  (left) 
delta   T    pad    constant-impedance  attenuator;    r-f,    a-f   and    wobbler 
posts;  modulation  on-off  switch  and   tuning  knob. 


Greatly  simplified  circuits 
and  a  new  factory  tech- 
nique enable  me  to  offer 
the  lowest- priced  precision 
products  —  Treasure  at  the 
Price   of   Trash! 

Signal  Generator 
Goes  to  4.3  Meters 

A  common  problem  in  signal  gen- 
erators concerns  high  frequencies. 
The  cost  of  adding  an  extra  band  is 
very  small.  The  problem  of  sustain- 
ing stable  oscillation,  or  any  oscil- 
lation, on  that  band  is  large.  In 
GENEROMETER  there  is  a  sixth 
batid,  25-70  mc.  That  is  only  one 
indication  of  surpassing  engineering 
skill.  Another  is  the  solution  of  the 
leakage  problem,  so  that  the  attenu- 
ator is  effective  on  ALL  bands. 


BIGGEST  DIAL  OF  ALL 


.   11  INCHES  IN  DIAMETER! 


..In  six  bands  GENEROMETER  covers  120  kc  to  70  mc.  all  on  fundamentals,  no  harmonics  used.  Accuracy 
is  1%.  120  kc-1100  kc;  2%,  1.1-25  mc;  5%,  25-70  mc.  It  has  the  biggest  dial  of  all— ELEVEN 
INCHES  diameter — with  vernier  drive.  It  combines  low  price  with  the  perfection  found  only  in  costly  signal 
generators.  It  supplies  all  the  intermediate,  radio  and  ultra  frequencies  for  complete  alignment  of  all  types 
of  receivers.  Constant  impedance  output  is  at  200  ohms  and  at  10,000  ohms.  Separate  sine-wave  audio  output 
permits  checking  audio  amplifiers,  public  address,  speakers,  etc.  For  50-60  cycle,  90-130  q-*  j\  aa 
volts  a.c.  Size  12^  x  8*4x6  inches.  Shipping  weight,  12  lbs.  Price,  complete  with  tubes  »|>1Q3U 
and    shielded    cable    *w 

MULTIMETERS    AT    5000   OHMS    PER    VOLT 


In  alt,  35  set-vices  are  combined  in  MAXIMETER 
(above),  with  4^4"  square  Bakelite-cased  microam- 
meter,  while  METERETTE,  the  pocket  instrument  at 
right,  provides  14  services,  using  3"  meter  of  the  same 
sensitivity.  Hence  both  are  5,000  ohms  per  volt  d.c. 
These  and  all  other  Bernard  instruments  were  de- 
signed and  engineered  on  the  basis  of  Bernard's  four- 
teen years'   experience  in  the  test  equipment  field. 

Maximum  MAXI  METER'S    35    ranges 

_  _  .  are  provided  at  only  two 
Ranges  But  jnput  posts,  and  with  only 
Minimum  Price  two  controls,  an  exclusive 
feature.  They  are:  5  D-C 
VOLT:  10-50-250-500-2500  v.  <d>  5CP0  ohms  oer 
volt:  5  D-C  CURREMT:  1-10-100  milliamperes,  1-10 
amperes;  5  RESISTANCE:  3000  ohms  (11-ohm  cen- 
ter); base  times  10-100-1000-10000  to  30  meg.; 
4  A-C  VOLT:  1.5-15-150-1500  @  1200  ohms  per 
volt;  4  OUTPUT  METER:  1.5-15-150-1500  @  1200 
ohms  per  volt;  4  DB:  minus  10  to  plus  55;  3  CA- 
PACITY: 0.2  mfd.  (.01  mfd.  center),  base  times 
10-100  to  20  mfd.;  3  INDUCTANCE:  30  henries 
(11-henry  centere),  base  times  10-100  to  3000  hen- 
ries; 1  A-C  CURRENT:  1.5  amperes.  WATTAGE: 
150  watts  for  line  a.c.  Model  3S5,  complete  with 
test  leads  and  batteries  (self-con-  CAAAn 
tained);  shipping  weight  16  lbs.  ?yll!»' 
Price    


L 


METERETTE     (above)     provides    14    splendid  ser- 
vices and,   like  all   other   Bernard   instruments,  has 
fetching    panel,    and    cabinet    of    outstanding  at- 
tractiveness, strength  and  quality. 

The  best  and  smallest  switch-  Smallest 

type  pocket  instrument  made  •,.      u____ 

—panel    3x5  13/16     inches  Big-Range 

—METERETTE  provides  14         Pocket    Meter 

ranges.     Housed    in    Philip- 
pine  mahogany   cabinet  with   removable   hinged   cover. 
Tile  ranges  are: 

5  D-C  VOLT:  10-50-250-500-2500  @  5000  ohms 
per  volt;  2  RESISTANCE:  2000-2.000,000  ohms, 
with  3-v,  self-contained  battery:  4  D-C  CURRENT: 
200  microamperes;  10-100-1000  milliamperes  (one 
amp.);  3-AC  VOLT:  10-100-1000  O  1200  ohms 
per  volt; 

Model  3S1.  complete  with  test 
leads,  instructions,  battery.  Shipping 
weight,   3   lbs.     Price 


?13 


90 


*29c 


All  Bernard  instruments  carry  a  90-day  guarantee 
against  mechanical  or  electrical  defects  of  the  in- 
struments  as   a   whole   and   all   the   parts    in  them. 


All   Bernard   multimeters  combine  the  a-c/d-c  switch  with  the  ohms  adjuster,  thus  eliminating  the  third  control 
present    in   most   other   multimeters.     Switch   stops   and   dial    scales  are  color-coded. 

See  Your  Jobber— Ask  for  Circular  "T",  or  Write 

tl.  J.,  IBIEIR^AIRID 


319-T  THIRD  AVENUE 


BROOKLYN,  N.  Y. 


Export  Agent:  Pan-Mar  Corporation,   1270  Broadway,  New  York  City 


September,  1938 


59 


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MERIDEN,    CONN. 


Arvin  station  variator. 

scription  shows  that  two  sets  of  trim- 
mer condensers  are  used  for  selection 
of  six  stations.  The  station  variator 
is  built  into  the  oscillator  circuit  and 
is  an  iron-core  which  is  moved  in  the 
field  of  the  oscillator  coil.  Movement 
of  the  coil  changes  the  oscillator  fre- 
quency thereby  permitting  selection  of 
several  nearby  stations  for  each  push 
button. 

The  antenna  circuit  remains  fixed 
for  each  push  button.  The  amount  of 
detuning  for  stations  other  than  those 
set  up  is  slight. 

The  station  variator  also  has  the 
desirable  feature  that  it  can  be  used 
to  overcome  slight  drift  in  the  oscil- 
lator circuit,  thereby  keeping  the  set 
in  tune  with  the  station  at  all  times. 

AUTOMATIC  TUNERS  NEED 
OUTSIDE  ANTENNA 

*  In  a  recent  service  bulletin 
Stewart-Warner  Corp.  calls  attention 
to  the  need  of  a  good  antenna  instal- 
lation on  electric  tuning  sets.  Quot- 
ing, "All  automatic  tuning  receivers 
should  be  operated  on  a  good  outside 
antenna-  to  give  maximum  signal 
strength.  An  inside  aerial,  while  it 
may  permit  satisfactory  reception  for 
a  manually  tuned  set,  will  not  pro- 
vide sufficient  strength  to  operate  the 
A.F.C.  during  automatic  tuning. 

"Many  dealers  connect  several  sets 
to  one  antenna  in  their  stores.  This 
is  liable  to  result  in  poor  automatic 
operation,  since  it  cuts  down  signal 
strength." 

And  on  automatic  sets  not  having 
A.F.C,  we  have  noticed  that  a  short 
antenna  will  not  always  give  good  re- 
ception, since  with  a  slight  amount 
of  mistuning  a  strong  hiss  results. 
With  a  better  antenna,  even  though 
the  mistuning  is  the  same,  the  signal 
strength  is  great  enough  to  override 
the  hiss. 

(Continued  on  page  62) 


STOP.' 

And  Read  the  Hews  Abou^ 

RCA'S  SENSATIONAL 
NEW  TUBE  TESTER! 


AGAIN,  RCA  comes  through  with  a 
_f\_  winner!  This  time,  it's  the  sensational 
new  tube  tester  —  that  not  only  offers  you 
more  stand-out  features  than  any  other — 
but  which  costs  only  $37.95  net. 

Look  at  its  features !  They'll  convince  you 
that  once  more,  RCA  combines  the  finest 
quality  with  the  greatest  value! 

Only  RCA  Radio  Tube  Tester  Offers 
All  These  Features 

1  Test  new  t-1/2  volt  battery  tubes. 

2  Tests  every  standard  type  of  receiving  tube  in- 
cluding all  ballast  tubes.  Also  tests  cathode  ray 
tubes  for  shorts  and  emission.  All  tests  made  ac- 
cording to  RMA  standards. 

3  Tests  four  prong  and  octal  base  ballast  tubes  for 
noisy  welds  and  opens. 

4  Tests  Magic  Eye  tubes  for  brilliance  and  open- 
ing and  closing  of  eye. 

5  Tests  voltage  drop  on  all  types  of  Gas  Tubes, 
such  as  OA4-G,  OZ4-G,  874,  and  others. 

6  Easily  operated.  All  operating  instructions  and 
settings  shown  on  simplified  roller  chart. 

7  One  Finger  Operation.  Buttons  released  or  re- 
tained automatically  as  required  for  testing. 

8  Shows  line  voltage  up  to  instant  of  actual  test. 
Not  necessary-  to  set  line  voltage  before  inserting 
tube  in  socket. 

Easily  Portable. . .  Ideal  for  Service  Work! 

The  large  illustration  at  the  top  shows  the  RCA 
Radio  Tube  Tester  as  designed  for  counter  use. 
Stock  No.  156-A,  net  price  $37.95.  The  unit  is  also 
available  with  cover  and  snap-type  handle  for  port- 
able use.  Stock  No.  156,  net  price  S  39-9  5. 

RCA  3"  Cathode  Ray 
Oscillograph 

This  is  RCA's  newest  and  finest 
general  purpose  3  in.  Oscillo- 
graph. Has  many  new  features 
— all  at  an  attractive  price.  Pro- 
vides an  easily  read  image  with- 
out requiring  expensive  acces- 
sory equipment  of  larger  tubes. 
All  controls  located  on  front 
panel.  Sensitivity -20  volts  (RMS) 
per  inch  deflection  without  am- 
plifier-with  amplifier.  0.5  (RMS) 
per  inch  deflection. 

Stock  No.  155-563.95  net 

Over  325  million  RCA  radio  tubes  have  been  purchased  by 

radio  users  ...  in  tubes,  as  in  parts  and  test  equipment,  it 

pays  to  go  RCA  All  the  Way. 


7e5r£fiup»mt 


60 


Radio  Today 


BRUSH  Lntroouces 
a  khak  UveL  mike 
wilk  PRICE  appeal 


This  new  Brush  H.  L.  microphone  is  sure  to  gain  popular 
appeal.  It's  ideal  for  use  with  public  address  systems,  ama- 
teur radio  transmitters — in  fact,  any  place  where  an  inex- 
pensive and  high  level  microphone  (minus  46  db)  is 
needed. 

The  Vari-swiv  mounting  is  another  feature.  It  enables 
the  mike  to  be  used  in  an  upright  position  or  tilted  to  any 
angle.  Mike  obtainable  with  three  prong  male  plug  assem- 
bly if  specified. 

Write  for  details.  Complete  with  25  feet  of  cable — $23.50. 

THE  BRUSH  DEVELOPMENT  CO. 

^^^^^^MMMHMH^^H  3313   PERKINS  AVENUE 

CLEVELAND,  OHIO 


INTERFERENCE 
ELIMINATION 

Profit-Builders 


by  SPRAGUE 


The  Sprague  Interference  Analyzer 
— a  compact,  professional  instru- 
ment VA"  wide  x  7"  high  and 
3"  deep.     Net  $9.75. 


The  new  Sprague  Plug-In 
Filter  —  just  the  thing 
for  stopping  noises  at  the 
set  quickly  —  effectively. 
List  $1.00  each. 


The  famous  Sprague  Interference  Ana- 
lyzer combined  with  the  special  Sprague 
Noise  Filters  gives  you  the  first  prac- 
tical, inexpensive  method  for  eliminating 
radio  noises  AT  THE  SOURCE.  It  tells 
you  exactly  what  filter  to  use — and 
exactly  what  results  you  will  get. 

For  eliminating  noises  AT  THE  SET,  try  the 
new  Sprague  Plug-in  Filters.  Scientifically  de- 
signed for  the  job,  you'll  be  pleasantly  surprised 
at  their  amazing  effectiveness.    A  real  profit-maker! 

KEEP  THIS  PROFITABLE  BUSINESS 
IN  THE  TRADE! 

Sprague  interference  elimination  materials  are 
designed  for  radio  servicemen — sold  THROUGH 
servicemen.  We  equip  you  to  do  a  thorough  job, 
help  you  go  after  this  profitable  business.  Write 
today  for  complete  details  on  the  Sprague  Radio 
Interference  Elimination  plan. 

SPRAGUE  PRODUCTS  CO. 

NORTH  ADAMS,  MASS. 


A  MILLION   DOLLAR  BABY  .  .  . 
.  .  .  That  Does  a  Man-Sized  Job 

Get  next  to  the  best!    Use  Sprague  ATOMS   (the 
new    midget    dry    Electrolytics)    for   those    johs 
where  you've  got  to  save  space — where  you've 
got  to  use  a  really  good  condenser  at  a  rock 
bottom  price.   S  mfd.  450  V.  lists  at  only 
60c.     All    replacement    capacities    in* 
eluding  duals. 


September,  1938 


61 


■HMH 


SERVICE  TIPS 

Crotley   model  42-S 


Distortion 

*  There  is  a  dual  by-pass  unit 
which  is  used  for  the  detector,  and 
first  audio  cathode  bias  resistors. 
Sometimes  a  leakage  will  develop 
between  these  units,  causing  distor- 
tion. Simply  replace  both  of  these 
condensers.   Values  are  .5  mfd. 


Philco  model  70 


Microphonic  howl 


*  If  this  condition  occurs  when 
the  tone  control  is  turned  all  the 
way  to  the  left  check  the  .0002  5 
microfarad  phone  condenser  con- 
nected to  the  plate  of  the  second 
detector.  This  condenser  has  a  yel- 
low dot  on  one  side  and  causes  the 
(rouble  due  to  changes  in  its  value 
or  to   its  becoming   open. 


Radiola  model  18 


Oscillation 


+  There  is  an  adjusting  screw 
between  the  first  two  tuning  con- 
densers. It  is  accessible  through  the 
hole  in  the  condenser  frame.  The 
correct  adjustment  is  made  as  fol- 
lows: Tune  in  some  station  between 
1,400  and  1,500  Kc.  and  turn  the 
adjusting  screw  clockwise,  until  you 
obtain  oscillation  and  then  turn  it 
counter-clockwise  until  the  oscilla- 
tion stops.  Selectivity  may  be  im- 
proved to  some  extent  by  adjusting 
the  R.F.  compensating  condenser 
screw  slightly  clockwise  to  bring  the 
circuit  closer  to  the  oscillation 
point. 


The  Zenith  radiorgan  tone  control  is  a  series  of  separate  switches  con- 
trolling the  tone  response  of  the  set. 


Silvertone  Interrupted   reception, 

model  1640  A-V-C  time  lag 

Replace  the  .1  mfd.  a-v-c  condenser 
with  a  .01  unit.  To  overcome  undesir- 
able hiss,  insert  an  r-f  choke  in  the 
red  plate  lead  of  the  83  tube.  In  un- 
usual cases  another  may  be  required 
in  the  other  plate  lead  of  this  tube. 

U.  S.  radio  model  26-P  Oscillation 

Evidenced  by  extremely  high  screen 
voltages,  this  condition  is  due  to  an 
open  screen  bleeder  resistor  (2,560 
ohms).  Replace  with  a  2,500  ohm  value. 


Edison  models 
Rl,  R2,  CI.  C2 


Major 
weaknesses 


The  12,500  ohm  series  plate  resistors 
and  the  1,500  ohm  centertapped  re- 
sistors for  bias  of  the  50  type  tubes 
have  asbestos  washers  at  their  ends. 
The  absorption  of  moisture  causes 
these  washers  to  transmit  dampness 
into  these  resistors,  causing  corrosion 
and  shortening  their  lives.  Replace 
with  bakelite  washers.  The  25,000  ohm 
loss  resistor  should  be  replaced  with  a 
ten  watt  unit  whether  it  tests  all  right 
or  not. 


When  it  comes  to  electric  shavers  a  radio 
dealer  should  handle  only  the  best! 

ROTO -SHAVER 

Thousands  Have  Been  Sold  for  $18.75 


NOW 


$12 


.50 


LIST 


WITH   2   HEADS,   SNSTANTLY   INTERCHANGEABLE 

A  Shaving  Head  for  Him A   Depilator  Head  tor  Her 


The  public  is  tired  of  make-shift  shaving  devices — 
and  is  ready  and  waiting  for  a  shaver  that  performs 
its  promises.  That's  the  only  kind  you  should  carry. 
Retailers  everywhere  proved  this  to  themselves  with 
the  Roto-Shaver  at  $18.75.  Now — at  the  new  low  price 
of  $12.50  it  represents  the  greatest  electric  shaver 
value  on  the  market.    Roto-Shaver  shaves  as  close  as  a 


fine  blade  razor  the  first  time  it's  used — won't  irritate 
even  the  most  sensitive  skin — is  sturdy,  easy  to  clean, 
doesn't  spray  "whisker-dust."  A  hard-hitting  national 
advertising  campaign  is  already  building  demand. 
Ride  on  the  crest  of  this  wave.  Order  a  supply  to- 
day— being  sure  to  mention  your  jobber's  name  so  we 
can  refer  your  order  to  him. 


REGULAR   DISCOUNTS    CONTINUE 
On  orders  of  one  to  five  shavers,  33  1/3%.      On  orders   of  six  or  more   shavers,   40%. 

PROGRESS  LEKTRO  SHAVE  CORP.,  521  Fifth  Ave.,  New  York  City 

Canadian   Dist.  Progress   Corp.    (Canada)   Ltd.,  55  York  St.,  Toronto,  Can. 


62 


Radio  Today 


BERNARD  CONTROLS 


"An  exclusive  combination  of  the 
ohms  adjuster  with  the  AC-DC  switch, 
which  confines  the  controls  to  two,  in- 
stead of  three,  marks  the  line  of  Ber- 
nard multimeters,"  according  to  H.  J. 
Bernard,  manufacturer  of  the  instru- 
ments. "In  addition,  the  pulsating 
DC  through  the  meter  is  rendered 
negligible,  so  that  the  needle  provides 
the  same  steadiness  of  reading  on  AC 
as  on  DC. 

"The  basic  circuit  of  this  simple 
scheme  is  shown  in  accompanying  di- 
agram. M  is  the  DC  meter,  R  is  a 
limiting  resistor,  Z  a  copper-oxide  rec- 
tifier, and  Sw  is  a  single-pole,  double- 
throw  switch.  Following  the  sense  of 
the  diagram,  when  the  switch  is 
thrown  to  the  left  it  opens  the  recti- 
fier circuit  and  at  the  same  time  shorts 
out  the  limiting  resistor,  so  that  the 
meter  is  free  for  introduction  of  the 
usual  DC  voltage  multiplier  and  DC 
current  shunts,  whereas  when  the 
switch  is  thrown  to  the  right  the  lim- 
iting resistor  is  brought  into  circuit, 
as  is  the  rectifier.  Thus  meter  and 
resistor  form  a  DC  voltmeter,  and  the 
combination  measures  the  pulsating 
DC  across  the  rectifier. 

"The  main  selector  switch,  the  only 
other  control  used,  picks  up  separate 
voltage  multipliers  for  DC  and  separate 
ones  for  AC.  Since  there  is  also  an 
ohms  -  adjusting  rheostat,  Rh,  the 
S.P.D.T.  switch  is  made  mechanically 
a  part  of  that  control,  and  thus  single 
control  of  the  two  functions  is  estab- 
lished." 


FAIRBANKS-MORSE 
STRESSES  TONE 


"A  review  of  our  1939  line  will  in- 
dicate that  we  are  eliminating  the  real 
low-priced  sets  from  the  Fairbanks- 
Morse  line,  and  are  being  rather  con- 
servative as  to  the  number  of  sets  in- 
cluded," comments  Earl  L.  Hadley. 
manager  of  advertising  and  sales  pro- 
motion, home  appliance  division,  Fair- 
banks, Morse  &  Company,  Indianapolis, 
Ind. 

"We  are  stressing  quality  and  per- 
formance, plus  startlingly  realistic 
tone.  The  line  includes  table,  console 
and  console  grande  models  with  7-,  9- 
and  12-tube  chassis.  Features  are  as 
follows:  instant  electric  tuning,  acou- 
stic-sealed tone  chamber,  monitor 
panel,  complete  permeability  tuning, 
cabinetry  of  highest  quality  with  inter- 
locking construction,  and  clearer  and 
stronger  short-wave  reception." 


BE  SURE  YOU  SEE 
THIS  BIG  NEW  CATALOG! 


Ask  your  Jobber  to  show  it  to  you 
Get  the  equipment  you  need  to 
do  More  business  .  .  .  better 
business  this  year  FREE  with  your 
purchases    of    .    .    . 

NATIONAL    UNION 

Radio  Tubes  and  Condensers 


Fop    nearest    Distributor's    name    write: 

NATIONAL    UNION    RADIO    CORP. 

Newark,    New    Jersey 


NEW 


"MARINE  MIDGET" 
P.  M.  REPRODUCER  and 
"TALK-BACK"   UNIT 

All  of  the  exclusive  Storm-Proof  features  of  the  larger  Atlas 
"Marine  Horns"  are  included  in  the  new  "Marine  Midget."  The 
reproducer  is  ideal  for  all  types  of  sound  installations,  including 
inter- communication  and  "talk- back"  systems.  The  inverted  reflex 
design  offers  high  efficiency  directional  characteristics,  and  abso- 
lute weather   and   mechanical   protection. 

It's  compact  and  easy  to  install.  (Bell  diameter  10",  depth  8".) 
Mounting  bracket  included.  All  aluminum  construction,  battleship 
grey  enamel   finish.  <h—  ^pa 

Model  WX-5SP  Complete  with  Speaker      11  it 

SEND  FOR  FREE  CATALOG  .  .  .  Write  now  for  technical  de- 
scription of  the  new  ".Marine  Midget"  and  other  high  powered 
"Marine  Horns"  for  large  P.  A.  installations.  New  1938  Fall 
Catalog  contains  101  P.  A.  accessories.  Widest  selection  of  Micro- 
phone Stands,  Baffles,  P.  M.  Horn  Type  Units,  Trumpets,  Speaker 
Enclosures. 

ATLAS       SOUND 

CORPORATION 


1454    39th    Street 


Brooklyn,    N.  Y. 


September,  1938 


63 


mm 


w 


CHECK  THESE 
"ALL-STAR"  FEATURES! 

PROVIDES  BETTER  RECEP- 
TION. Operating  on  same  prin- 
ciples as  modern  broadcasting 
stations  with  their  vertical  an- 
tenna masts,  WARD'S  new  home 
aerial  assures  better  pick-up,  bet- 
ter reception  than  old  style 
"clothesline"  aerials. 

GUARANTEED       RUSTPROOF. 

Constructed  of  attractive,  nickel- 
plated,  super-sized  bronze  tubes. 
4  sectional.     12  ft.  in  height. 

EXTRA  SAFE.  Lightning  Ar- 
restor  on  WARD'S  new  home 
aerial  houses  a  .002  MFD  con- 
denser for  additional  capacity 
required    by    old    and    new    sets. 

EASY  TO  INSTALL.  No  poles, 
supports  or  guy  wires  required. 
Everything  needed  for  installa- 
tion comes  packed  with  aerial. 
WARD'S  new  home  aerial  mounts 
vertically  to  soil  pipe,  or  against 
chimney,  cornice,  window  frame, 
garage,   etc. 

FREE!  !  Write  or  wire  today  for 
free  catalog  of  WARD'S  com- 
plete line  of  low  priced,  fast- 
selling:  nerinls   for  car  and   home. 


TA* WARD  PRODUCTS  (?0iP. 

WARD    BUILDING  CLEVELAND,    OHIO 


C-D  LAUNCHES 
BIGGEST  CAMPAIGN 


A  sales  promotional  campaign  of 
extra  size  has  been  announced  for  this 
fall  by  Cornell-Dubilier  Corp.,  South 
Plainfleld,  N.  J.  Counter  displays,  di- 
rect mail  and  publication  advertising 
will  all  be  included  in  the  big  drive 
which  sales  manager  Leon  Adelman 
describes  as  "excelling  the  other  plans 
used  during  the  previous  years." 


ADDITIONS  TO 
ARCTURUS  DEAL 


A  cash  and  change  register,  an  elec- 
tric clock,  a  new  dealer's  Neon  sign, 
and  various  test  instruments  from  the 
Weston,  Precision  and  Supreme  lines, 
have  been  annexed  to  the  equipment 
deal  offered  by  Arcturus  Radio  Tube 
Co.,  Newark,  N.  J.  The  company  points 
out  that  its  complete  list  of  dealer 
helps  now  includes  all  business  neces- 
sities for  the  radio  merchant,  from 
business  stationery  to  technical  equip- 
ment 

EMERGENCY  STOCK  OVERCOMES 
AEROVOX  STRIKE  HANDICAPS 

An  emergency  stock  of  standard 
types  of  condensers,  set  up  in  the  Mid- 
dle West,  is  now  available  to  jobbers 
for  the  prompt  filling  of  their  orders 
during  the  Aerovox  C.I.O.  strike  in  the 
Brooklyn  plant.  There  will  be  no 
shortage  and  no  delay  in  taking  care 
of  jobber  business,  reports  the  Aerovox 
management. 

"During  April,  May  and  June,  when 
business  was  more  or  less  at  a  stand- 
still among  set  manufacturers,"  states 
S.  I.  Cole,  president  of  Aerovox  Cor- 
poration, Brooklyn,  N.  Y.,  "we  received 
much  less  business  from  that  source 
than  usual.  However,  rather  than  lay 
off  our  employees,  we  concentrated  on 
the  manufacture  of  jobber  stock.  As 
a  result,  we  have  a  tremendous  stock 
of  all  jobber  items  on  hand  to  take 
care  of  requirements  for  the  balance 
of  this  year  at  least.  Most  of  this 
stock  has  been  transferred  to  a  Middle 
West  warehouse,  and  shipments  from 
that  point  are  already  rolling.  The 
strike  is  having  no  adverse  effect  what- 
soever on  the  normal  handling  of  our 
jobber  business. 

"With  regard  to  the  C.I.O.  strike,  the 
facts  are: 

"For  two  and  a  half  months  we  dili- 
gently carried  on  negotiations  with 
the  C.I.O.  Union,  endeavoring  our  ut- 
most to  avoid  a  strike,  but  without 
success.  In  our  previous  contract  there 
was  a  clause  to  the  effect  that  the 
Union  was  not  to  make  any  other  con- 
tract at  lower  terms  than  we  had.  The 
Union  did  not  live  up  to  this,  and 
within  the  last  month  gave  a  competi- 
tor in  this  same  district  lower  terms. 
We  wanted  the  same  deal  but  the 
Union  refused,  and  wouldn't  tell  us 
why — your  guess  is  as  good  as  ours  as 
to  the  reason  for  such  dealing.  At  a 
meeting  held  by  the  State  Mediation 
Board,  it  was  suggested  to  us  that  we 
let  things  remain  status  quo  until  an 
agreement  could  be  worked  out.  This 
we  agreed  to,  provided  someone  from 
the  Board  would  sit  in.  The  Union 
insisted  on  a  strike." 


Complete 
Electric  Plants 


COMPLETE    POWER   UNITS 

Operating  A.C.  Radio,  PUBLIC  AD- 
DRESS SYSTEMS,  SOUND  CARS, 
MOTION  PICTURE  EQUIPMENT, 
and  RADIO  TRANSMITTERS.  Also 
furnish  Power  for  Lights,  Water  Sys- 
tems, Refrigerators,  all  Household  Ap- 
pliances for  FARMS,  CAMPS,  LAKE 
HOMES,  or  STANDBY  SERVICE.  For 
use  anywhere  Power  Line  Current  is 
not  available. 

A  PLANT  FOR  EVERY  PURPOSE 

110  Volt  A.C.,  6,  12,  32  and  110  Volt, 
D.C.  as  well  as  Combination  A.C.-D.C. 
Units.  Anyone  can  Operate.  COM- 
PLETE, READY  TO  RUN. 

f  WRITE  TOR  DETAILS  ON  DEALERS'  11 
PROPOSITION  AND  TERRITORY  J] 

D.  W.  ONAN  &  SONS 

595  Royalston  Ave.,  Minneapolis,  Minn. 


FREE/OOiet/s  /939 

RADIO  CATALOG 

Ready  Now-Send  For  It! 


Every  Radio  Dealer,  every 
Service  Dept.  needs  this 
big  guide  to  Everything 
in  Radio  at  lowest  prices! 
Over  14,000  exact  dupli- 
c  a  t  e  and  replacement 
parts;  all  leading  lines  of 
Test  Equipment,  includ- 
ing new  Push  -  Button 
Testers;  newest  Sound 
Systems,  Kits,  Amateur 
Gear,  books,  tools,  etc. — 
and  62  amazing  1939 
KNIGHT  Radios— sets  for 
every  purpose  —  ideal 
price-leaders  as  low  as 
$6.95!  ISO  pages  of 
values — write  today  for 
A  L  L  I  E  D  '  S  new  1939 
Catalog. 


FREE! 

Send  Coupon!] 


ALLIED  RADIO 
CORPORATION 

Dept.  15-J-9,  833  W.  Jackson  Blvd..  Chicago,  III. 

Send  me  your  1939  Catalog — FREE 

Name    


I 


I 

i    Address     ■ 


64 


Radio  Today 


C  O  H I  Igss&ig 


X     n     W     *  p  motors  a»»*opP\v 

Saw  sr?«°?s$i£«r  ss»y& 

P»OB«CT  rtGOUo 

%s  ts*  $,  Sw 


AGED.. 


FOR  EFFICIENCY 


Nc 


IO  better  vibrator  is  made  than  the  Meissner.  But  to 
our  knowledge  no  other  vibrator — even  the  other  well 
designed  ones — are  aged  at  the  factory  to  guarantee  their 
uniform  efficient  operation ! 
Lying  on  a  jobber's  shelf,  the 
several  metals  used  in  any 
vibrator  undergo  slight  metal- 
lurgical changes  which  may 
seriously  affect  its  efficiency 
and  life.  Only  Meissner  goes 
to  the  extreme  of  aging  vibra- 
tors at  the  factory  and  re- 
testing  them  to  eliminate 
those  where  the  efficiency  has 
deteriorated. 

Order  Meissner  from  your 
parts  jobber  and  know  that 
you  can  always  guarantee  a 
replacement. 


^ 


MT.  CARMEL 
ILLINOIS 


VIBRATORS 


RCA  INSTRUMENTS  DO  A 
BIG  JOB  AT  SMALL  COST 


NEW  RCA  2"  CATHODE  RAY 
OSCILLOGRAPH  .  .  .  uses  the 
RCA-902  2"  cathode  ray  tube 
.  .  .  Has  new,  easily-read,  tilt- 
mounted  screen.  All  controls 
on  front  panel.  Amplifiers, 
both  horizontal  and  vertical  — 
gain  50— sensitivity  0.5  (RMS) 
per  inch  .  .  .  Has  built-in,  saw- 
tooth oscillator. 
Stock  No.  151-2.  $49.95 


RCABEAT  FREQUENCY  AUDIO 
OSCILLATOR  .  .  .  range  -  30  to 

15,000  cycles.  For  testing  loud- 
speakers, P.  A.  systems,  etc. 
Three  output  impedances.  Has 
large,  easily-read  dial. 
Stock  No.  154     ..    .     $49.95 

RCA   presents  the   Magic  Key  every 

Sunday,  2  to  3  P.  M.,  E.  D.  S.  T., 

on  the  NBC  Blue  Network. 


Over  32  5,000,000  RCA  radio  tubes  have  been  purchased 

by  radio  users  ...  In  tubes,  as  in  parts  and  test  equipment, 

it  pays  to  go  RCA  All  the  Way. 


l'PmMtHAVB/7% 

A  som£  of 


•  Customers  are 
grateful  for  good  ser- 
vice work.  Some  do 
express  their  appre- 
ciation by  gratuities 
...  all  by  continued 
patronage.  That  is 
how  a  business  is 
built  up.  The  use  of 
Ward  Leonard  Re- 
placement Parts  goes 
a  long  way  toward 
giving  satisfaction. 
They  are  conserva- 
tively rated  ...  so 
stand  up. 


llllllill!lll!llll!llllllllinilUIIIII!ll!!llli:!ll!i:illlllll!ll[llll!lll!!l[ll " IIUIIIIIIIIia::[lllllllllllllllll!IIIIIIH 

WARD  LEONARD  ELECTRIC  CO. 

40  South  Street.  Mount  Vernon.  N.  Y. 

Please  send  me   Price  List  Bulletin   507  A. 


Name    . 
Street 
City    .  . 
Jobber 


September,  1938 


65 


Six  more  new  jobbers  have  been  an- 
nounced for  Stromberg  Carlson  by  dis- 
tributor manager  Fred  N.  Anibal.  They 
are:  Cloud  Bros.  Co.,  902  S.  Michigan 
St.,  South  Bend,  Ind.;  Radio  Studios, 
Inc.;  136  E.  Broadway,  Salt  Lake  City, 
Utah;  The  Killian  Co.,  Cedar  Rapids, 
Iowa;  Rogers  Maytag  Co..  1415  Fifth 
Ave.,  Moline,  111.,  and  Electric  Sales  <£• 
Service,  19S  Walton  St.,  N.  W„  At- 
lanta, Ga. 


«2l 


535*  SF§S&5S 


UWOLCSflLE  AUDIO  SERYIC€  El 

100  SIXTH  AVE.,  NEW  YORK,  N.  Y. 

CHICAGO,  ILL.    •    ATLANTA,  GA.    •    BOSTON,  MASS. 
BRONX,  N.  Y.     •     NEWARK,  N.  J.     •  '  JAMAICA,  II. 


Sales  heads  of  Steem-Electric  Corp.,  1726  Lafayette  Ave.,  St.  Louis,  Mo.,  make 
promotion  plans  for  their  "successor  to  the  electric  iron."  Left  to  right,  Benny 
Ginsberg,  L.  Cooper,  L.  Gershon,  president  E.  F.  Pohl,  L.  Wiener  and  H.  Smith. 


JOBBERS 


Appointment  of  new  distributors  for 
the  exclusive  sale  of  Wilcox-Gay  record 
players  and  radios  has  been  announced 
by  sales  manager  Warren  Hasemeier: 
Clary-Marsh,  Inc.,  Birmingham,  Ala.; 
United  Radio  Supply.  New  Britain, 
Conn.;  Sechtman  Hardware  Co.,  Hart- 
ford, Conn.;  Capital  Paper  Co.,  Indian- 
apolis, Ind.;  H.  E.  Sorenson  Co.,  Des 
Moines,  Iowa;  Union  Supply  Co.,  Bur- 
lington, Iowa;  Warren  Electric  Co., 
Sioux  City,  Iowa;  Lincoln  Sales  Corp., 
Baltimore,  Md.,  and  Washington,  D.  C. ; 
Dygcrt  Distributing  Co..  Grand  Rapids, 
Mich.;  Disco  Distributing  Co.,  St. 
Louis,  Mo.;  H.  C.  Noll  Co.,  Omaha, 
Neb.;  Wehle  Electric  Co.,  Binghamton, 
Rochester,  Elmira,  and  Buffalo,  New 
York;  Herrlinger  Distributing  Co., 
Cincinnati,  Ohio;  Standard  Radio  Parts 
Co..  Dayton,  Ohio;  Hood  Electric  Co., 
Youngstown,  Ohio;  Elliott-Lewis  Elec- 
trical Co.,  Philadelphia,  Penn.;  Tydings 
Co.,  Pittsburgh,  Penn.;   Tennessee  Val- 


ley Appliances,  Inc.,  Nashville,  Tenn.; 
Momsen-Dunnegan-Ryan  Co.,  El  Paso, 
Tex.;  McLendon  Electric  Co.,  Waco, 
Tex.;  Sound  Systems,  Inc.,  Hunting- 
ton, W.  Va. ;  Blue  field  Hardware  Co., 
Bluefield,  W.  Va. 


Following  the  debut  of  the  1939  Ad- 
miral line,  some  23  distributors  have 
been  named.  The  list  includes:  Mar- 
shall Wells  Co.  of  Portland  and  Seattle, 
whose  sales  manager  is  Warren  Hart- 
icell,  and  radio  department  manager  is 
"Monte"  Ward;  Birmingham  Electric 
Co.,  Birmingham,  Ala.;  Gambill  Dis- 
tributing Co..  Nashville;  H.  E.  Soren- 
son Co.,  Des  Moines;  Electric  Supply 
Co.,  Oakland,  Calif.;  The  Bauman  Co., 
Minneapolis;  Reid  Motor  Supply  Co., 
Quincy,  111.;  Stallman  of  Ithaca,  Ithaca, 
N.  Y. ;  Southern  Bearings  &  Parts  Co., 
Charlotte,  N.  C:  Harbison  d  Gath  right, 
Louisville;  Atlantic  Electric  Supply 
Co.,  Inc.;  Richmond,  Va.;  Englewood 
Electrical  Co.,  Chicago;  Felt  Radio  Co., 
Salt  Lake  City;  Hinsdill  Electric.  Co., 
Troy,  New  York;  Philadelphia  Light 
Supply  Co.,  Philadelphia;  Radio  Tele- 
vision Co..  Phoenix,  Ariz. 


Modernizing  Sets  Pays  Better  than  Trading 


QUALITY  STANDARD  OF  THE 
RADIO  INDUSTRY 


dlgpannnuftAiio 


Auto  and  Home  Radio  Service  Laboratory 


Experts  Make  More  Through  Stepping  Up  Tone 
of  Old  Receivers  by  Audio  Dynatesting 


FIGURE  trade-in  loss,  overhead,  cost  of 
selling,  installation  and  free  service,  and 
what  you've  got  left  out  of  selling  a  #100 
receiver  is  a  fraction  of  the  clear  profit 
from  a  #15  to  #20  audio  modernization 
job,  requiring  not  more  than  three  hours 
to  perform,  by  modern  dynamic  method. 
Is  it  any  wonder  that  experts  who  boast 
the  needed  equipment  and  knowledge  of 
how  to  use  it  are  making  money,  while 
less  skilled  service  men  are  having  a  hard 
time  getting  by? 

"Complete    Dynamic   Testing,    Step-by- 
Step,    with    Time-Saving    Cathode    Ray," 


by  Kendall  Clough,  president  and  chief 
engineer,  is  the  key  to  top  notch  service 
profit  through  teaching  how  to  diagnose, 
in  quickest  fashion,  any  trouble  in  any 
receiver,  including  audio  deficiencies,  and 
so  to  apply  swift  and  sure  correction.  Best 
of  all,  it  takes  no  college  degree  to  learn, 
but  can  be  put  to  work  by  anyone  able  to 
read  receiver  diagram,  in  quick  time. 

Supplied  free  with  the  purchase  of  any 
C-B  instrument.  Also  sold  by  leading 
jobbers,  or  mailed  direct  anywhere  for 
50c.  See  your  jobber,  or  write,  enclosing 
stamps   or  coin,  TODAY! 


^mg^msg^^^^^^^^^^^^E^BS^B^B^ESSS^Bffl^E^B 


2827  W.  19th.  St. 


The  CLOUGH  -BRENGLE  CO. 


m* 


Chicago,  111.,  U.S.A. 


66 


Radio  Today 


Simon  Distributing  Corp..  Washing- 
ton, D.  C,  jobbers  for  Motorola,  were 
recent  hosts  to  local  dealers  at  an  ad- 
vance showing  of  1939  merchandise. 
President  ./.  H.  Simon  and  his  assist- 
ants Al  Harris  and  '■Bill"  Hartmeyer 
led  the  demonstrations.  Prominent 
dealer  guests  included  Sun  Radio 
Corp.,  Manhattan  Auto  Radio,  Georges 
Radio,   etc. 

General  Electric  has  established  a 
direct  factory  distributing  branch  at 
700  Commonwealth  Ave..  Boston,  for 
the  area  formerly  served  by  W.  L. 
Thompson.  Inc.  C.  M.  Wilson  is  man- 
ager and  V.  W.  Broun,  operating  man- 
ager. The  Boston  and  Buffalo,  N.  Y., 
sales  districts  have  been  combined, 
with  the  Buffalo  man  J.  A.  Ramsey 
named  district  manager. 

Lecture  meetings  of  a  semi-technical 
nature  for  service  engineers  and  deal- 
ers will  be  held  this  Fall  in  100  of  the 
key  cities  of  the  U.S.,  jointly  sponsored 
by  local  RCA  distributors  and  by  RCA 
service  execs.  Service  manager  Ed- 
ward C.  Cahill  of  RCA  has  announced 
that  the  September-October-November 
series  will  cover  radio's  newest  tech- 
nical developments. 

Vice-president  Hoicard  C.  Briggs  of 
Howard  Radio  Co..  returning  to  Chi- 
cago from  an  eastern  trip,  has  news 
about  new  distributors.  New  jobbers 
for  Howard  communication  receivers 
include  E.  J.  Tydings,  Pittsburgh,  and 
Hatry  &  Young.  Inc.,  covering  Hart- 
ford, New  Haven,  and  Bridgeport. 
Conn.  Distributors  in  Maine  are  Royal 
Amusement,  Auburn;  House  Sherman, 
Inc..  Rockland.  Those  in  Massachu- 
setts are  H.  Jappe  Co.,  Boston,  with 
branches  at  Worcester,  Dover  and 
Manchester  in  New  Hampshire,  and 
Wholesale  Radio  Co..  Boston.  T.  F. 
Cushing  handles  them  at  Springfield. 
Aaron  Lippman  covers  Newark,  N.  J. 
Metropolitan  jobbers  on  amateur  sets 
are  Davega-City  Radio  Co..  Gross 
Radio,  Inc.,  Harrison  Radio  Co..  Ter- 
minal Radio  Co.,  and  Harvey  Radio 
Co.  New  upstate  N.  Y.  distributors 
are  Dymac  Radio  Co.,  Buffalo;  Niag- 
ara Radio  Co..  Falls  City;  Ft.  Orange 
Radio  Co.,  Albany;  Roy  C  Stage,  Syra- 
cuse; E.  Berndt  Co.,  Syracuse;  and 
Beaucaire,  Inc.,  covering  Rochester. 

Radio  Accessories  Co.,  distributors 
at  2566  Farnum  St.,  Omaha,  Neb.,  are 
mailing  to  dealers  and  servicemen  in 
the  Middlewest,  Southwest  and  West, 
a  new  24-page  Spring  supplement  cat- 
alog. RACO  bargain  list  includes  a 
big  section  of  sound  equipment. 

MANUFACTURERS  AND  DISTRIBS 
MUST  HELP 

{From,  page   50) 

ing   the    quantity   buyer    an    equal 

chance  to  meet  demands  at  a  higher 

overhead. 

All  jobbers  should  belong  to  the 
XKPDA  or  a  similar  association. 
Dealers  and  servicemen  should  join 
local  organizations  which  in  turn 
would  work  with  a  national  associa- 
tion. 

These  three  groups  in  turn  should 
work  with  the  manufacturers  in  solv- 
ing the  evils  we  hear  so  much  about, 
but  about  which  we  do  so  little. 


"TOKFOXE" 

THE   MOST   COMPLETE   LINE   OF   IXTER  -  COMMUNICATING    EQUIPMENT 


The  TOKFONE  JR.  comes  with  master  and  remote  station  and  50  ft.  of  wire 
ready  to  install.  This  is  a  low-priced  two-way  intercommunicating  system  de- 
signed for  use  among  executives,  professionals,  hospitals,  garages,  homes,  drug 
stores,  etc.  Abo  available  for  three-wire  system  called  our  TOKFONE  JR.  S-W 
with  switching  arrangment  on  substation  to  cut  out  background  noises  at  slight 
additional    charge.      Price SI 0.75    NET 


Tokfone  Jr.  Master  Station 


Tokfone  Jr.  Remote  Station 


Model  142EA  comes  equipped  with  an  earphone  for  private  conversation. 
It  is  a  complete  two-way  intercommunicating  system  from  2  to  11  sta- 
tions, with  a  selector  switch,  low-priced,  efficient,  .economical  and  fast- 
est method  of  holding  direct  two-way  amplified  communication  between 
two  or  more  persons  or  departments.  Ideal  for  use  for  hotel  paging, 
hospitals,    department   stores,   factories,    offices,    etc.      Comes    complete 

with  master  remote  station   and   50   ft.   of  wire $12.95   NET 

Also  available  with  switching  arrangement  to  cut  out  background  noises 
at  small  additional  charge. 


Tokfone 
Model   142EA 
Master  Station 


TOKFONE  MODEL  510  MASTER  STA- 
TION equipped  with  earphone,  selector 
switch,  volume  control,  50  ft.  of  wire, 
ready  to  install.  Gives  you  complete 
inter- communication  between  any  stations 
or  any  group  of  stations. 


Tokfone 

Model  142E 

Remote  Station 


Direct  conversation  can  be  had  with  this 
system  without  the  use  of  a  talk-listen 
switch.  Comes  with  earphone  and  ready  to 
use.  Per  station,  price.  .$12.00  NET 
-< —  Tokfone  Model  510 — Master  to 
Master  Station 


TOKFONE  MODEL  141  is  a  two  watt  Beam  Power  System;  comes 
complete  with  master,  50  ft.  of  wire  and  one  remote  station.  Ideal 
for  use  where  great  volume  is  desired  for  offices,  factories,  small  in- 
dustrial plants,  garages,  etc.  Up  to  10  stations  can  be  hooked  up 
with  this   system.      Price $17.50   NET 


Tokfone  Model  141  Master  Station 


Tokfone  Model  141A  Remote  Station 


TOKFONE  Model  144  comes  complete  with  master 
station.  Hypower  Supply,  substation  and  100  ft.  of 
wire  and  is  a  10  watt  com- 
bined paging  and  inter-com- 
municating system  which 
uses  6"  P.M.  speakers 
throughout.  This  system  has 
a  master  switch  for  paging 
all  outlying  stations  simul- 
taneously, selector  switch 
for  calling  single  outlying 
stations.    Outlying    stations 


1 


Above  illustration  shows 
comprising    master,   sub 


can  call  the  master  station,  etc.  Also  comes 
available  with  switch  and  three  wire  system  to  shut 
out  background  noise.  Ex- 
tremely sensitive  and  power- 
ful, using  2— 6B5  push 
pull  in  the  output. 
Master,  sub  station,  Hy- 
power Supply  and  100  ft. 
of  wire.... $32. 95   NET 


complete   Model  144  system 
station   and    Hypower  Supply 


Three    Wire    Model    144SW 
at  slight  additional  charge. 


Send   for  Catalog   Showing   Complete   Line 

AMPLIFIER   MANUFACTURING   CORP. 


REGAL 


lfi   WEST    lTth    STREET 


Cable   Address :"Ramcoamp" 


XEW   YORK    CITY 


September,  1938 


67 


LOOK,  MR.  SERVICEMAN! 

•  CHAPTERS    in  45    CITIES 

•  MEMBERS  in  EVERY  STATE 

•  and  in  ALL  PARTS  of  the  WORLD 

....    That's    the   Record  of  the   RSA    in 
only   7    Months! 

More  and  more,  Servicemen  have  come  to  realize  that  it  pays  to 
belong — that  the  RSA  is  the  one  big  constructive  and  progressive 
organization  of  Servicemen  for  Servicemen — that  it  is  genuinely 
and  actively  helping  every  member. 

YOU  GET  ALL  THIS 

(Material  and  Service   that's  Worth  $75  and  more!) 

YOU  become  eligible  for  participation  in  the  Advanced  Exten- 
sion Course  for  Professional  Servicemen — available  to  RSA 
Members  only.  -^  YOU  GET  monthly  Advertising  and  Business 
Promotion  ideas  to  increase  your  business  and  make  it  more 
profitable.  ^  YOU  GET  a  subscription  to  "The  Radio  Service- 
man"— the  Association's  monthly  magazine.  -j(  YOU  GET  the 
benefits  of  being  included  as  a  "REGISTERED  AND  QUALI- 
FIED SERVICEMAN"  on  record  at  National  Headquarters  for 
reference.  -^  YOU  GET  a  Certificate  of  Merit  to  hang  in  your 
shop.  *  YOU  GET  a  pocket  card  of  credentials.  *  YOU  GET 
the  assistance  of  our  big  expert  technical  staff  as  a  department  in 
your  service  business.  We  will  give  you  the  right  answer  to  your 
"impossible"  service  problems.  -^  YOU  GET  (if  you  belong  to 
a  local  serviceman's  group)  access  to  our  National  Speakers' 
Bureau — famous  speakers  for  your  meetings,  -jf  YOU  GET  ad- 
vance technical  information  on  new  circuits. 

It's  as  important  to  you  as  your  job  or  your  business!  JOIN 
NOW  and  get  in  on  all  its  benefits. 

RADIO  SERVICEMEN  OF  AMERICA 

JOE  MARTY,  Jr.,  Executive  Secretary,  304  S.  Dearborn  St.,  Chicago,  III. 

r MAIL  THIS  COUPON! , 


RADIO  SERVICEMEN  OF  AMERICA,  INC. 
304  South  Dearborn  St.,  Chicago,  111. 

Gentlemen : 

I  hereby  make  application  for  membership  in  the  Radio  Service- 
men of  America. 

Name    

Home  Address  

City State 

Firm  Name    

Address    

□  I  am  enclosing  $2.00  National  Yearly  Dues 
(Plus  Nominal  Local  Chapter  Dues) 

□  Bill  me  $2.00  National  Yearly  Dues. 


NEW  BOOKLETS 


Shure  Bros.,  225  W.  Huron  St.,  Chi- 
cago, have  brought  out  a  new  catalog 
on  ultra  wide  range  microphones,  crys- 
tal pickups,  "communications"  mikes, 
stands  and  accessories,  directional 
crystal   mikes,  and  vibration  pickups. 

Zenith  Radio  Corp.  makes  the  sug- 
gestion "add  to  your  radio  enjoyment 
with  recorded  entertainment"  in  a  new 
folder  featuring  Zenith  phonograph- 
radio  combinations  for  every  occasion. 
Ten  models  are  presented.  There  is 
also  a  section  on  the  "Radiorgan"  fea- 
ture. 

The  P.  W.  Sickles  Co.,  300  Main  St., 
Springfield,  Mass.,  has  released  a  new 
catalog  on  its  quality  "Diamond 
Weave"  radio  electrical  apparatus. 
Number  of  this  22-page  illustrated 
booklet  is  939. 

The  latest  jobber  catalog  sheets,  bul- 
letins J-ll  and  J-13,  on  public  address 
equipment  controls,  are  now  available 
direct  from  Clarostat  Mfg.  Co.,  Inc., 
285  N.  6th  St.,  Brooklyn,  N.  Y.  Com- 
plete descriptions,  listings  and  appli- 
cation data  are  included. 

Radio  &  Technical  Publishing  Co., 
45  Astor  Place,  New  York  City,  will 
send  free  a  new  illustrated  circular  on 
Alfred  A.  Ghirardi's  newest  book  for 
service  men,  "Radio  Trouble-Shooter's 
Handbook."  It  gives  full  information 
in  the  50  sections  of  the  volume,  cover- 
ing all  phases  of  repair  service. 

"New  1939  Jackson  Radio  Testing 
Equipment"  is  the  title  of  an  8-page 
booklet  released  by  Jackson  Electrical 
Instrument  Co.,  Dayton,  Ohio.  Auto- 
matic range  selection  is  featured  in 
one  section;  ways  to  modernize  service 
shops  with  Jackson  service  lab  units 
are  suggested  in  another. 

Complete  information  on  the  instal- 
lation of  Philco's  new  Mystery  Control 
receivers  has  been  issued  to  jobbers  in 
booklet  form.  This  is  the  first  tech- 
nical dope  of  any  kind  to  appear  on 
the  Mystery  Control;  it  was  written  by 
sales  engineer  Henry  T.  Paiste,  Jr. 

All  jobbers  are  invited  to  write  to 
Triad  Mfg.  Co.,  Inc.,  Pawtucket,  R.  I., 
for  a  supply  of  the  firm's  bulletin  No. 
115  for  distribution  to  dealers  and  ser- 
vicemen. The  booklet  handles  the  re- 
placement problem  in  ballast  resistors, 
giving  the  new  numbering  system,  the 
base  wiring,  voltage  drop  and  pilot 
table. 

"Facts  About  Television"  is  a  new 
18-page  booklet  issued  by  American 
Television  Corp.,  130  W.  56th  St.,  New 
York  City.  The  five  Videor  home  tele- 
vision receiver  models,  including  the 
Kinet  portable  extension,  now  being 
marketed  by  the  firm,  are  shown  and 
described. 

Newest  addition  of  "Sound  Apparatus 
Bulletin"  has  just  been  published  by 
Sound  Apparatus  Co.,  150  W.  46th  St., 
New  York  City.  It  features  a  new 
Simplex  record-cutting  device,  and  in- 
cludes general  data  on  sound  and  re- 
cording. 


68 


Radio  Today 


•flnn&unciny 

RIDER  MANUAL 

VOLUME   IX 


1650  pages  S10.00 


ANOTHER  great  Rider  Manual— Vol- 
i  ume  IX,  covering  1938-39  American- 
made  radio  sets.  Here  is  one  of  the  most 
important  volumes  of  them  all.  Every 
serviceman — bar  none — will  need  it.  At 
your  finger  tips  are  1650  pages  of  the  most 
complete  and  authentic  compilation  of 
service  data  available  in  the  industry. 
Rider  Manual  Vol.  IX  features  an  entirely 
new  "How  It  Works"  Section — the  most 
"talked-of"  feature  of  Vol.  VIM.  It  makes 
clear  by  practical  example  the  complicated 
circuits  and  baffling  service  problems  which 
you  must  cope  with  in  repairing  modern 
radio  sets.  There  is  also  a  new  140-page 
easy-to-find  index  included  in  Vol.  IX,  at 
no  extra  cost,  which  covers  all  NINE 
volumes,  now  containing  a  total  of  11,270 
pages. 

Remember,  Rider  Manual  Vol.  IX  will 
be  ready  for  you  November  19th.  You'll 
want  to  put  this  great  volume  to  work  for 
you  right  away,  so  place  your  order  with 
your  jobber  without  delay. 

Vol.  IX  -SIO.O0-Ceietiii|1tll-U 
Vol.  vlll-JIO.OO-CeHring  1917-11     Vol.  IV -S7.S0-Co.etmg  IIJI-M 
VtL  VII  -  lO.OO-Corering  19)6-17     Vol.  Ill-  7.S0-Covering  19)2-11 
Vol. VI   -   7.50-Co»erini  19)5-11      vol.  II  -  7.50-Covering  I91I-H 
Vol.V    -   7.50-Co«rinj  1914-15     Vol.  I  -  7.50-Coiering  1920-11 

RIDER  BOOKS 
SAVE    YOU    TIME 

AFC  SYSTEMS— 144  pp.  Hard  Coven $1.00 

CATHODE  RAY  TUBE — 366  pp.  450  illus.  .  .  .  $2.50 

Other  Rider  Beaks:  Servicing  Supeihelerodynei;  Align- 
ing Philco  Receivers— $1.00  each.  "Hour  a  Day  with 
Ridef"  books  on  A  VC  Control;  on  Resonance  &  Align- 
ment; on  A-C  Distribution  in  Radio  Receivers;  on  D-C 
Distribution— 60c  for  each  book. 

JOHN   F.  RIDER,  Publisher 

404   FOURTH    AVENUE,    New  York  City 


A  condensed  catalog  No.  10  jn  "Ra- 
dio Service  Equipment,  1939"  has  been 
issued  by  Hickok  Electrical  Instru- 
ment Co.,  10514  Dupont  Ave.,  Cleve- 
land, Ohio. 

Wright  -  DeCoster,  Inc.,  St.  Paul. 
Minn.,  have  released  a  new  12-page 
catalog,  in  red,  which  carries  details 
and  illustrations  on  the  firm's  complete 
line  of  reproducers,  and  replaces  all 
other  catalogs  The  company's  new 
line  of  radio  service  speakers,  for  re- 
placement work,  is  included. 

To  servicemen  who  are  entering  Hy- 
grade  Sylvania's  Service  Shop  Moderni- 
zation Contest,  or  are  otherwise  plan- 
ning shop  improvements,  there  is  now 
available  a  booklet  containing  complete 
specifications  of  the  Sylvania  Model 
Service  Shop.  The  book  comes  from 
the  firm  at  Emporium,  Pa.,  at  10c. 

Ideal  "Thermo-Grips"  are  presented 
as  the  latest  in  electric  soldering  tools, 
is  a  new  booklet  issued  by  Ideal  Com- 
mutator Dresser  Co.,  1231  Park  Ave.. 
Sycamore,  111. 

Latest  edition  of  RCA's  "Wheel 
Static,"  prepared  for  the  company's 
auto  radio  service  network,  concerns 
tire  static,  including  practical  service 
hints  and  installation  data. 

All  the  new  wire  products  and  as- 
sortments of  Alpha  Wire  Corp.  are 
shown  and  described  in  a  new  catalog. 
No.  38.  Address  50  Howard  St.,  New 
York  City. 

Specifications  and  price  sheet  on 
Ohiohm  resistors  has  been  released  by 
the  Ohio  Carbon  Co.,  12508  Berea  Road, 
Cleveland,  Ohio. 

"Again  in  1939  Admiral  Rules  the 
Air  Waves"  is  the  title  of  a  new  folder 
released  by  Continental  Radio  &  Tele- 
vision Corp..  3800  W.  Cortland  St.. 
Chicago.  Tilt  Tuning,  with  the  Full 
Vision  Illuminated  "Slide  Rule"  dial. 
is  featured,  and  the  elaborate  presen- 
tation includes  console  and  table  model 
combinations,  and  straight  radios, 
auto  sets,  and  battery  receivers. 

Leotone  Radio  Co.,  63  Dey  St.,  New 
York  City,  have  released  a  new  booklet 
on  cone  assemblies,  field  coils,  speak- 
ers, "hard-to-get"  parts,  pickup  and 
microphone  repair  services,  Balkite 
service  station,  and  accessories. 

Timed  to  appear  with  the  opening 
of  the  fall  buying  season,  Federal  Sales 
Co.  will  shortly  issue  a  new  catalog 
featuring  many  special  items  of  radio 
hardware,  notably  those  used  by  the 
manufacturers  of  sets,  interphones, 
sound  equipment,  testing  instruments, 
speakers,  etc.  This  line  is  also  a  favor- 
ite with  jobbers  because  of  its  variety 
and  completeness.  Copies  of  the  cata- 
log should  be  requested  on  company 
stationery,  address  to  26  South  Jeffer- 
son Street.   Chicago. 

Loose-leaf  sheets,  with  concise  and 
complete  listings  of  all  Clarostat  prod- 
ucts, will  now  be  sent  to  those  address- 
ing the  company  at  285-7  N.  6th  St., 
Brooklyn,  N.  Y.  These  are  catalog 
sheets  for  counter  and  jobber  sales- 
man use. 


SERVICE  IS  ON 
i  THE  MARCH! 


— these  new  Simpson 
instruments  will  help 
you    keep    up    with    the    parade 

EACH  year  service  becomes  more  complex  .  .  . 
each  year  adds  new  models,  new  circuits  and 


w  problems  ...  but  through  it  all  the  Simpson 
organization  has  more  than  kept  pace. 

*—  ---  *-  -L : — •-     c: — —     line     of 

vho 
lOdel 


The     new     up-to-the-minute     Simpson 
instruments     have     been     designed     by     me 
know  every  angle  of  the  testing  job.    Each   ...uu 
has   been   built  to  help   you   do   a   better  job  .  . 
to   enable   vou    to    make   more   out    of    the    serv: 


to   enabte   you    to   make   more   out 
end    of  the   business. 

A  few  of  the  important  features  ol  just  a  small 
part  of  the  Simpson  line  are  presented  below. 
Give  them  the  once  over  and  then  write  tor 
complete  information.  It  will  pay  you  to  keep  up 
with  the  service  parade  and  Simpson  instruments 
will   help  you  do  it. 

SIMPSON   ELECTRIC  CO. 
5202  Kinzie  Street,  Chicago,  ILL 

You  have  never  seen  a 
tube  tester  the  equal  of 
this  at  a  price  of  $26.50. 
The  New  Simpson 
Model  333 
Tests  ballast  tubes.  Has  pro- 
vision for  testing  pilot  lamp 
and  gaseous  rectifiers  of  the 
OZ(  type  new  double  filament 
switching.  Jack  for  noise  test  with  neon  bulb 
of  super  sensitivity  for  checking  shorts.  Latest 
R.M.A.  standard  circuit.  Convenient  size  only 
7'/:"xl0'/i"x5"   and  weighs  7  lbs. 

And  now  the  master  of  all  set  testers, 
the  new  Simpson  Model 
440  "Testmaster". 

A  tube  tester  of  improved  de- 
sign—based on  R.  M.  A.  stand- 
ards, employing  double  switching 
of  filament  terminals  for  testing 
special  tubes  without  adaptors 
or  special  sockets. 

A  set  tester  of  tremendous 
scope — As  a  set  tester  the  Model  440  has  six 
A.  C.  and  D.  C.  voltage  ranges.  Four  milli- 
ampere  ranges  are  provided  and  there  are  six 
decibel  ranges  and  D.  C.  current  range  of  0-15 
amperes  for  auto  work.  Capacity  range  is  0-30 
microfarads.  Meter  leakage  test  for  all  con- 
densers including  elect roly tics  is  provided. 
It  will  do  more  for  you  at  its  moderate  price  of 
559.00  than  any  tube  or  set  tester  on  the  market. 

A  midget  with  a  big  service 
range — the  Model  230  Volt- 
Ohm  Milliammeter. 

The  smallest  ^Pocket-Type"  A.  C. 
and  D.  C.  service  instrument  on  the 
market.  Measures  only  S%"  high  by 
27/t"  wide  by  \lU"  deep,  yet  it  con- 
tains a  sufficient  number  of  ranges  for 
the  experienced  man  to  do  a  complete  servicing 
job.   Net   Price $14.25 

Another  member  of  the 

Roto-Ranger  family 

Model  275 

10,000  Ohms  per  volt 
Service  men  everywhere  are 
sold  on  the  Roto  Ranger 
"direct- reading"  convenience. 
To  change  from  scale  to 
.itch  is  moved  to  any  of  the 
and — presto! — the  right  scale 
a  scale  that  is  designed  for 
asy,  accurate  reading  and  not  one  where  you 
have  to  multiply  by  10  and  divide  by  50  before 
you  guess  at  the  result.    Net  Price $42.50 


SIMPSON% 

9lLilVUUM£Jttl     tk&t     STAY    CLUMfUjU 


'  Simpson  Electric  Co.,  5202  Kinzie  St.,  Chicago  J 

■  Send    bulletin    describingO  No.  333D  No.  230 

I  model  checked  Q  No.  440QNo.  275 


scale  the  selector  s 
markings  around  it 
pops   into 


I 


September.  1938 


69 


For  Easy,   Correct  Tube  Testing 

use  a 

HICKOK  DYNAMIC 

MUTUAL  CONDUCTANCE 

TUBE  TESTER 

With  Illuminated  Meter  Dial 

Model  T53C 


The  only  dual  reading  unit  made 
indicating  Dynamic  Mutual  Con- 
ductance in  Micromhos — also  Good* 
Replace,  Doubtful.  Dynamic  Mutual 
Conductance  is  recognized  by  tube 
manufacturers  and  engineers  as  the 
only  exact  test. 

Among  Many  HlrK0K  Features  are: — Checks  rjas 
content  on  the  meter;  Detects  both  short  and 
open  elements;  Elements  tested  separately  in  multi- 
element tubes;  Short  tests  made  hot  or  cold; 
Only  one  setting  to  make.  No  complications.  No 
customer  confusion.  There  are  many  other  exclu- 
sive HICKOK  features.  Also  made  in  portable  style. 

MAIL  THE  COUPON  FOR  STEW  1030 
CATALOG   \o.  10  giving  information 

about  this  and  all  other  Hickok 
Itatlio  Testing'  Equipment. 

HICKOK  ELECTRICAL  INSTRUMENT  CO. 

10410   Dupont  Ave.,  Cleveland,   Ohio 

HICKOK    ELECTRICAL   INST.   CO., 

Cleveland,  Ohio 

Gentlemen.     Please   send   Catalog   No.    10    Id 

Name    

Address     

City  &  State 


TRADE  FLASHES 


Cinaudagrapli  Corp.  has  a  new  sales 
policy  in  the  New  York  Metropolitan 
area.  The  Stamford,  Conn.,  speaker 
manufacturers  will  appoint  engineers 
to  contact,  direct  from  the  plant,  the 
manufacturing  and  jobhing  customers 
in  the  area.  The  plan  is  designed  for 
closer  cooperation  in  company-to-cus- 
tomer matters;  general  sales  director 
D.  P.  O'Brien  will  supervise  it. 


Dr.  Ralph  L.  Power,  Los  Angeles  ra- 
dio counsellor  who  for  the  past  five 
years  has  been  the  American  repre- 
sentative for  some  of  the  leading  radio 
interests  in  Australia,  has  been  named 
as  U.S.  representative  for  the  newly 
formed  Macquarie  network,  a  million- 
dollar  Australian  organization.  Mr. 
Power  will  continue  to  act  as  resident 
buyer  for  American  script  and  tran- 
scriptions, will  sell  Australian  tran- 
scriptions in  the  U.S.,  and  will  repre- 
sent the  Macquarie  network  in  the  sale 
of  time  to  American  sponsors. 


Announced  by  Freed  Transformer 
Co..  72  Spring  St.,  New  York  City,  are 
two  new  representatives:  Harry  E. 
Marshall  will  handle  the  Pacific  Coast 
area,  including  the  states  of  California, 
Oregon  and  Washington;  Vaughn  & 
Co..  Houston,  Tex.,  will  cover  Texas, 
Louisiana.  Oklahoma,  Arkansas  and 
New  Mexico. 


KADETTE  WIRELESS 
TUNEMASTER 

The  International  Radio  Corp.  of 
Ann  Arbor,  Mich.,  has  just  an- 
nounced its  Tunemaster  radio.  The 
compact,  portable  device  will  con- 
trol the  customer's  present  radio 
or  any  number  of  radios  in  differ- 
ent rooms  entirely  by  wireless. 
The  Tunemaster  gives  instanta- 
neous push-button  tuning,  plus 
complete  manual  control  over  the 
entire    broadcast   band. 

According  to  the  manufacturer, 
it  will  operate  any  number  of 
compact  Kadette  reproducers  one- 
quarter  the  size  of  a  console,  giv- 
ing commensurate  tone  quality  and 
volume. 


Jarvette/  JLotaru  Converters 


FOR  CONVERTING  D.C.  TO  fl.C. 

•  Built  especially  for  radio  and  sound  apparatus — cap- 
acities 110  to  3250  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service — 
used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus — in  use  all  over  the  world  # 
WHY  EXPERIMENT  —  INSIST  ON  A  JflNETTE 
ASK   FOR    BULLETIN   13-1 


Janette  Wlaiuifactutuur  Company 

556*558  TUestmonwe  Steeet  CHic<ujo,  ILL.XL.S.jq. 


•  Users  of  condensers  are  now  offered 
a  more  critical  and  conclusive  yardstick 
of  condenser  quality  in  the  AEROVOX 
Capacity  and  Resistance  Rridge.  Com- 
bines, in  a  single,  portable  instrument, 
the  following: 

CAPACITY  BRIDGE 

Measures  capacity  100  mmfd.  (.0001) 
to  100  mid.  in  (>  ranges;  leakage:  power 
factor  to  50%.  etc.,  of  condensers 
under   actual    working   conditions. 

RESISTANCE  BRIDGE 

Measures  resistance  values  of  resistors 
and  electrical  equipment  and  circuits. 
10  ohms  to  1   megohm  in  5  ranges. 

INSULATION  RESISTANCE 

Measures  this  important  factor  in  con- 
denser* and  other  devices.  Meter  ca'i- 
hrated  directly  in  megohms.  Reads  lip 
to   10,000   megohms. 

VACUUM-TUBE  VOLTMETER 

Consists  of  amplifier  stage  and  grid- 
leak  detector.  Measures  minute  values 
0-2    volts. 

PRECISION  METERS 
Voltmeter,  also  for  external  use,  pro- 
vides 0-00.  0-300  and  0-000  v.  meter  at 
1000  ohms  per  volt.  Also  a  00  mv.  at 
OO  ohms  millivoltmeter;  and  milli- 
aiiimeter  0-6  ma..  0-00  ma. 


VARIABLE  POWER  SUPPLY 


Available  directly  nt  terminals. 
000  volts  continuously  variable 
entire    raiitt'c. 


1.1    to 
over 


As\  to  See  It  . . . 

•  Your  local  AEROVOX  jobber  can 
show  you  ihis  indispensable  instrument. 
Or  write  us  direct  for  descriptive  litera- 
ture. 


FKO^m 


CORPORATION 

70  Washington  St  :  Brooklyn,  M.  V. 

■i)m!ii,i»ij;ufiJMi.iiiaii!— ■•!«■ 


70 


Radio  Todav 


Vice-president  Sherman  Rer.ir  Hoi/t 
of  Cinaadagraph  Corp.,  Stamford. 
Conn.,  now  has  the  additional  duties  of 
general  manager  of  the  firm,  following 
l  he  company's  announcement  that 
Harold  W.  Harwell  has  resigned  as 
vice-president  and  general  manager. 
Other  officers  remain  the  same:  John 
Sherman  Hoyt,  president:  and  Howard 
C.  Seaman,  secretary  and  treasurer. 

Gene  Turney.  well  known  in  the  New 
York  area  as  an  expert  radio  and  elec- 
trical technician,  has  joined  the  staff 
of  the  H.  A.  Marsh  Advertising  Agency, 
307  Fifth  Ave..  Xew  York  City. 

University  Laboratories,  makers  of 
internally-folded  air-column  trumpets 
and  permanent-magnet  dynamic  driver 
units  for  public  address  use.  have 
moved  their  factory  and  sales  offices 
to  new  and  enlarged  quarters  at  195 
Christie  St..  New  York  City. 

RCA  Institutes  opened  its  first  courses 
in  television  with  the  beginning  of  the 
Fall  term,  Sept.  6  at  75  Varick  St.. 
New  York  City.  For  those  without 
previous  training  in  radio  engineering, 
the  course  requires  two  years  in  the 
day  school  or  five  years  in  the  evening 
school. 


HALSON  RADIO  MANAGER 


Herb  Brennan  has  been  named  sales 
manager  for  Andrea  Radio  Corp..  48-20 
48th  Ave.,  Woodside,  N.  Y.  Mr.  Bren- 
nan   was   for    5    years    the    New   York 


Eric  F.  Storm,  the  new  gen'l  sales 
mgr.  for  Halson  Radio,  is  a  widely 
traveled  U.S.  Signal  Corps  Captain 
with  many  years  of  electrical  sales 
experience  here  and  abroad. 


Herb  Brennan 


representative  for  Victor  Talking  Ma- 
chine Co.  before  he  entered  the  radio 
business  in  1921  as  general  sales  man- 
ager for  John  Firth  &  Co.  Subsequently 
he  spent  3  years  in  radio  executive 
work  in  Minneapolis.  Minn.,  and  later 
came  back  east  to  become  a  partner 
in  the  firm  of  Gross-Brennan,  Inc.. 
where  he  remained  for  7  years  with 
the  Stromberg-Carlson  representatives. 
These  interests  were  later  sold  out. 
and  Mr.  Brennan  spent  three  years  as 
Norge  representative  in  the  NY  area. 
Thus  he  now  approaches  his  new  post 
as  a  sales  executive  known  coast-to- 
coast  in  radio  and  appliances. 

Sales  manager  Walter  Spiegel  of 
Regal  Amplifier  Mfg.  Corp..  14  W.  17th 
St.,  New  York  City,  will  shortly  an- 
nounce a  new  and  improved  line  of 
"Tokfone"  intercommunicators.  The 
new  merchandise  will  be  in  the  lower 
priced  brackets,  where  Regal  has  spe- 
cailized.  The  company  has  been  one 
of  the  pioneers  in  publicizing  net. 
rather  than  list,  prices  to  the  trade. 


-SeU  BETTER  ANTENNAS 


National  Antenna  Check-up  Week  will  stimulate 
demand  for  better  antennas.  Get  behind  it — 
and  be  doubly  sure  you  sell  originals;  not 
cheap  imitations.  When  your  kits  are  marked 
"Licensed  by  Amy,  Aceves  &  King,  Inc.,"  they 
are    authentic    and    dependable. 

All  antenna  manufacturers  operating  under  our 
patents  furnish  two  major  types:  1 — All  Wave 
Full  Noise  Reduction,  and  2 — All  Wave  Signal 
Boosting,  but  not  noise-reducing  on  broadcast 
waves.  Be  sure  to  sell  the  right  one  for  the  job. 
Full  noise-reduction  costs  a  little  more  and  is 
worth  its  cost,  but  cheap  kits  do  not  actually 
provide  it.  You  and  your  customers  are  pro- 
tected  when   your   antennas   are  licensed   by 

AMY,  ACEVES  &  KING,  Inc. 
11   WEST  42nd  ST.  NEW  YORK 


— and  don't  risk  your 
reputation  with  cheap, 
unlicensed  outfits. 


*»l¥l* 


Lockheed  Plane  Ohmite-Equipped 

Hughes'  dash  around  the  world  in  his 
LOCKHEED  Plane  adds  another  "case 
history"  to  the  service-record  of 
Ohmite  Vitreous-Enameled  Rheostats 
and  Resistors.  Their  ability  to  with" 
stand  overloads  and  abuse,  shock  and 
vibration,  heat  and  humidity,  has 
made  Ohmite  resistance  units  stand- 
ard equipment  on  such  major  airways 
as  Pan-flmerican,  United  flir  Lines, 
and  others,  both  here  and  abroad — as 
well  as  in  the  general  radio  and  com- 
munications fields. 


OHMITE 
RHEOSTATS 

Time-proved  all 
porcelain  vitreous 
enameled  construe 
Hon  and  practically 
stepless  resistance  va 
nation  assures  per- 
manently smooth,  saf< 
close  current  contra 
Underwriters'  Labor- 
atories  Listed.  9  stock 
sizes  from  25  to  1000 
watts. 


OHMITE 
RESISTORS 

Be  Right  with  Ohmite! 
flsk  your  Jobber  for 
Ohmite  vitreous-enam- 
eled "Fixed"  and  ".Ad- 
justable" Resistors — and 
of  course,  the  popular 
wire  -  wound  "Brown 
Devil"  Replacement  Re- 
sistors. 


September,  1938 


Write  for  New  Catalog   17. 

OHMITE   MANUFACTURING  CO. 

4847   W.   F/ournoy   Ave.,  Chicago,  U.S. ,4. 


©IHlMflT' 

RHEOSTATS     RESISTORS     TAP  SWITCHES 


71 


£@*&0&^7y 


THE   NEW 

Lou/  Capacity 

LEVER  ACTION 

SWITCH 

.  .  .  for  any  application  where  mul- 
tiple contact,  low  capacity  switches 
are  required  to  operate  at  low  volt- 
ages and  currents. 

•  BROADCASTING  ...  In  control 
panels  for  commercial  and  ama- 
teur transmitters. 

•  RADIO  RECEIVING  .  .  .  Band 
changing,  I.F.  selectivity,  sensi- 
tivity, tone,  and  similar  controls. 

•  PUBLIC  ADDRESS  .  .  .  Central- 
ized sound,  inter-communicator, 
call  systems. 

•  TEST  INSTRUMENTS  .  .  .  Sig- 
nal generators,  analyzers,  tube 
testers,  multi-meters. 

•  INDUSTRIAL  USE  .  .  .  Elec- 
tronic apparatus,  signalling  de- 
vices, business  machines. 


A  space-saving  lever  action  switch 
that  may  be  furnished  singly  or  as- 
sembled to  nn  attractive  mounting 
plate  with  any  required  number  of 
switches  in  a  group.  Each  switch 
will  take  up  to  12  contacts  that  can 
be  used  in  countless  shorting,  or 
non-shorting  switching  sequences. 
Contacts  are  of  the  long-lived  double 
wipe  type. 

Centralab  Lever  Action  Switches  are 
furnished  with  either  two  or  three 
positions.  Index  action  can  be  posi- 
tive in  all  positions,  or  spring  return 
to   center   from   either   side. 

Send  for  specification  sheet 
number  028  for  further  elec- 
trical and  mechanical  details. 

Centralab 

Milwaukee,  Wis. 

BRITISH    CENTRALAB,    LTD. 

Canterbury  liil  ,   Kilburn 

London    N.W.   6,    England 

FRENCH    CENTRALAB   CO. 

118  Avenue  Ledru-Rollin  Paris  XI,  France 


RADIO  AND  TELEVISION 


Commander  McDonald  with  one  of  his  arm-chair  receivers,  a  type  which 
he  feels  will  be  the  "radio  of  tomorrow." 


RADIO  TOMORROW 

By  Commander  E.  F.  McDonald,  Jr. 
President   Zenith   Radio   Corp. 

The  editor  of  Radio  Today  has  asked 
me  to  tell: 

1.  "What   I   see  ahead   in   radio  and 

its  associated  arts. 

2.  "My  conception  of  what  the  radio 

business  will  be,  looking  a  few 
years  ahead  and  my  reasons  for 
my  views." 

The  editor  has  asked  me  to  speak 
frankly,  and  that  is  what  I  am  going 
to  do. 

First,  as  to  radio  itself,  I  see  it  as 
an  increasingly  powerful  force  for  pub- 
lic entertainment,  improvement,  and 
education.  The  big  broadcasting  com- 
panies are  doing  a  noble  job  of  self- 
regulation  and  are  in  addition  provid- 
ing a  fine  balance  of  editorial  matter 
of  various  kinds.  Radio  advertising 
has  come  a  long  way  from  the  days 
when  the  nearest  comparison  I  can 
think  of  was  the  old-fashioned  medi- 
cine show.  First  they  gathered  the 
crowd  by  entertaining  you.  Then  they 
made  you  sick  by  talking  about  your 
troubles.    Then  they  sold  you  the  medi- 


cine that  would  put  you  back  on  your 
feet  again.  That's  just  about  what  the 
advertiser  does  today  with  the  modern 
radio  show.  It  is  the  old  medicine 
show  but  very  much  streamlined,  pro- 
duced by  experts,  and  written  by  prac- 
tical psychologists  in  the  field  of  adver- 
tising and  merchandising. 

Many  sets  per  home 

The  variety  of  broadcasting  avail- 
able in  the  home  today  is  so  great  that 
each  member  of  the  family  can  find 
something  personal  to  him  or  her  at 
almost  any  time  of  the  day,  and  this  is 
a  good  sign  for  the  industry,  especially 
that  part  of  the  industry  which  is  mak- 
ing receivers,  because  it  is  promoting 
the  use  of  more  than  one  set  in  the 
home. 

The  industry  itself,  as  a  business, 
will  continue  to  go  places  if  it  con- 
tinues to  put  its  house  in  order.  By 
that  I  mean  that  the  radio  industry 
must  continue  to  improve  the  ethics  of 
selling.  It  must  give  greater  thought 
to  controlled  production  and  the  avoid- 
ance of  dumps.  It  must  protect  the 
dealer  and  improve  its  relations  with 
him  if  he  is  to  make  a  profit  from  his 
business  so  that  he  may  survive  as  a 
constructive  public  contact. 


BATTERY  OPERATED 


TUBE    TESTER 
and  ANALYZER 

AT  LAST  ...  A  RADIO  TUBE  TESTER  DESIGNED 
FOR  RURAL  AREAS  NOT  EQUIPPED  WITH  ELECTRICAL 
CURRENT.  NO  EXTERNAL  CONNECTIONS  ARE  RE- 
QUIRED.    IT  WORKS   RIGHT  ON    THE   SPOT. 

The  STARK  RURAL  METER  is  a  brand  new  develop- 
ment and  is  the  only  instrument  of  its  kind  on  the  market. 

SELF    CONTAINED    POWER    SUPPLY 

Enables  you  to  service  battery  radios  in  the  owner's 
home  ...  no  more  time  loss  in  carting  the  chassis  to 
your  shop.  The  RURAL  METER  contains  complete  tests 
for  all  DC  tubes,  including  new  1.4V  series,  plus  many  AC 
types  (over  200  test  positions)  .  .  .  also  resistance  and 
voltage   ranges. 

COUNTRY  RADIO  DOCTORS  — A  profitable  practice 
awaits  you,  as  you  not  only  get  the  chance  of  increasing 
your  sale  of  tubes,  batteries,  etc.,  but  make  valuable  sales 
contacts  and  new  prospects,  while  performing  a  service  for 
which  you  are  paid! 
For  complete  information  see  your  nearest  jobber  or  write  direct 


In  Canada 
Stark  Tube  Company 
Toronto,    Ontario 


ELECTRICAL    INSTRUMENTS 
418  So.  Wells  St.,  Chicago,  111. 


Foreign  Division 

141  W.   45th  St.,  New  York 

Cables    STAREK 


72 


Radio  Today 


I  feel  so  strongly  on  the  above  two 
points  that  I  have  for  three  years  past 
Incorporated  controlled  production  and 
dealer  protection  as  major  policies  No. 
1  and  No.  2  in  our  own  company's 
merchandising  programs.  I  have  in- 
sisted that  these  two  policies  be  rigidly 
pursued  by  our  executives  as  far  as  it 
is  in  our  power  to  maintain  them 
against  conditions  in  the  field  as  they 
exist.  Perhaps  I  am  wrong — perhaps  I 
am  doing  all  this  too  many  years  in 
advance,  but  let  me  tell  you,  the  dealer 
appreciates  what  we  are  doing,  and 
we  know  we  are  building  for  the  good 
of  the  entire  industry. 

Branding 

Thus  far  the  more  important  manu- 
facturing units  of  the  radio  industry 
have  been  proud  to  identify  themselves 
as  the  makers  of  the  radios  which  bear 
their  firm  name  and  trade  mark.  Dur- 
ing the  present  season,  however,  there 
has  been  a  decided  increase  in  a  prac- 
tice which  I  cannot  describe  in  any 
other  way  but  "false  branding."  This 
practice  is  especially  deceptive  in  cases 
where  a  radio  manufacturer  is  willing 
to  allow  his  name  and  trade  mark  to 
appear  on  a  radio  which  is  made  for 
him  by  another,  more  cheaply  than  he 
could  produce  it  for  himself  with  his 
own  facilities.  An  extra  profit  thus 
introduced,  and  manufacturing  super- 
vision is  removed  from  the  manufac- 
turer's own  plant  to  that  of  someone 
else — so  it  is  quite  logical  to  conclude 
that  a  radio  so  made  can  hardly  fail 
to  fall  short  of  that  maker's  product 
made  in  his  own  plant.  Besides  which, 
the  money  for  the  extra  profit  must 
come  from  somewhere  and  usually  it 
comes  out  of  the  customer's  pocket. 
Any  practice  which  tends  to  give  the 
customer  less  value  for  his  money  and 
a  less  carefully  made  product  than  he 
could  be  given,  is,  of  course,  to  be 
frowned  upon  because  it  represents  a 
step  backwards.  This  is  one  matter  on 
which  the  industry  should  formulate 
some  very  definite  policies  in  relation 
to  its  public.  As  the  matter  stands 
this  season,  with  a  few  outstanding 
exceptions,  it  presents  a  decidedly 
tangled  picture  to  the  ultimate  con- 
sumer. The  radio  industry  of  the  fu- 
ture will  avoid  ambiguities. 

It  is  customary,  I  believe,  in  a  state- 
ment of  this  nature  to  make  a  refer- 
ence to  television — in  fact  it  is  difficult 
to  avoid  that  question,  because  it  is 
always  asked.  I  am  happy  to  say  that 
my  company   has  just  been   given   its 


permit  to  operate  a  television  station 
and  we  can  now  go  ahead  and  build 
a  physical  station  for  experimental  pur- 
poses. This  we  shall  do.  The  first 
station  will  be  on  our  own  factory 
which  is  advantageously  located  in  a 
suburban  section  of  Chicago.  Experi- 
ments in  transmission  and  reception 
from  this  new  station  will  be  made  as 
soon  as  it  is  completed.  In  fact  we 
have  already  been  carrying  on  lab- 
oratory experiments  in  television  for 
some  time. 

Our  cautious  advance  in  the  field  of 
television  has  not  as  yet  altered  one 
of  my  favorite  maxims  "Television  is 
just  around  the  corner  for  the  stock 
salesman  only."  Television  is  coming 
just  as  surely  as  steamboats,  railroads, 
automobiles,  and  wireless  itself  have 
come.  It  would  be  useless  to  decry 
the  value  of  such  an  improvement  in 
radio  technique.  Yet,  like  other  simi- 
lar improvements  in  the  electrical  field, 
the  development  will  be  slow  but  sure. 
There  will  be  no  need  for  some  time 
to  come,  for  anybody  to  throw  his 
present  radio  out  of  the  window,  in 
favor  of  a  television  set. 


AMERICAN  RADIO  ASSOCIATION 
SEPT.  30-OCT,  2 

Walter  Schwalge,  convention  chair- 
man, has  announced  the  program  for 
the  American  Radio  Association  service 
meeting  and  show,  to  be  held  at  the 
LaSalle  Hotel,  Chicago,  Sept.  30  to 
Oct.  2. 

Speakers  and  their  topics  are: 

"Will  Radio  Service  Ever  Become  a 
Man's  Business?"  John  Meek,  presi- 
dent Electronic  Design  Corp. 

"Using  Photography  to  Sell  Radio 
Service."  J.  P.  Kennedy,  sales  man- 
ager Triumph  Mfg.  Co. 

"Utilizing  Manufacturers'  Window 
and  Store  Display  Material  to  Produce 
Profits."  Frank  Ewing,  vice-president 
Fensholt  Co. 

"Value  of  Insurance  in  Radio  Ser- 
vice Business."  T.  L.  Osborne,  Kemper 
Insurance. 

"Fundamentals  in  Successful  Promo- 
tion of  a  Service  Business."  Marcus 
W.  Hinson,  secretary  American  Radio 
Association. 

"Telling  the  World  About  Me."  Lorin 
C.  Collins,  associate  William  Hoffman, 
advertising. 

"How  to  Use  Direct  Mail  to  Promote 
a  Service  Business."  J.  S.  Older,  Buck- 
ley, Dement  &  Co. 


RADIO        TUBES 


l>ectet  ok 
TROUBLE-FREE 

RESISTORS 


It  is  a  matter  of  record  that  nine 
out  of  ten  resistor  breakdowns  are 
caused  solely  by  failure  of  the 
protective  covering,  either  in  its 
job  of  keeping  moisture  from  the 
element,  or  in  dissipating  heat 
properly. 

...  It  is  also  a  matter  of  record 
that  the  outstanding  popularity  of 
IRC  Resistors  results  in  no  small 
part  from  their  perfection  in  this 
respect.  Hand  in  hand  with  en- 
gineering improvements  inside  of 
the  resistors  themselves.  IRC  has 
pioneered  and  perfected  BOTH 
Molded  phenolic  insulation  for 
IRC  BT  Metallized  Resistors  and 
other  types,  as  well  as  the  famous 
Cement  Coating  for  heavy  duty 
power  wire  wounds. 

By  whatever  test  you  choose  to 
make — even  boiling  hot  and  freez- 
ing cold  salt  water  immersion — 
you'll  find  these  IRC  protective 
coatings  supreme. 

/Aeu  Stay  Put 


INTERNATIONAL 
RESISTANCE  COMPANY 

401  N.  Broad  St..  Philadelphia.  Pa. 
In  Canada,  187  Duchess  St..  Toronto.  Ont. 


73 


NEW! 

Model  CC 


CAPACITOR 
ANALYZER 


Incorporates  Model  CB  Features,  plus  High  Capacity  Scale,  High 
Test  Voltage,  Simplified  Scales,  Sloping  Panel 

This  advanced  Analyzer  measures  Capacity  .00001  to 
800  mfd.,  including  motor  starting  condensers;  measures 
Power  Factor  0  to  50%,  including  motor  starting  con- 
densers; measures  Resistance  50  to  2,000,000  ohms; 
measures  Insulation  Resistance  to  1000  megohms,  using 
test  voltages  to  600  D.C.;  detects  leakage  and  intermit- 
tents.  A.C.  operated. 

Cat.  No.  CC-1-60  (110  v.,  60  eye.)  Less  tubes— $24.90  net 

Order  through  your  jobber 

SOLAR  MFG.  CORP.  599-601  Broadway,  New  York 


•     INDEX     • 

TO 

ADVERTISEMENTS 


Page 

AER0V0X    CORP 70 

ALLIED    RADIO    CORP 64 

AMPERITE     CO 76 

AMY.    ACEVES    &    KING,    INC 71 

ARCTURUS    RADIO    TUBE    CO 55 

ATLAS    SOUND    CORP 63 

BELDEN     MFG.    CO 6 

BERNARD,    H.    J 59 

BRUSH    DEVELOPMENT    CO 61 

CENTRALAB      72 

CINAUDAGRAPH     CORP 67 

CLOUGH-BRENGLE    CO 66 

CONTINENTAL    RADIO    &  TELEV.    CORP.. IS.  19 

CORNELL-DUBILIER    ELEC.    CORP 51 

CR0SLEY    RADIO    CORP 43 

EMERSON    RADIO   &   PHONO.   CORP 3 

FAIRBANKS,     MORSE    &    CO 4 

FREED    TRANSFORMER    CO 75 

GALVIN    MFG.    CORP Cover  IV 

GENERAL    ELEC.    CO Cover  II 

GENERAL    INDUSTRIES   CO 47 

HALS0N    RADIO    &   TELEV.    CORP 60 

HICK0K    ELEC.    INSTRUMENT   CO 70 

HYGRADE    SYLVANIA    CORP 2 

INTERNATIONAL   RESISTANCE   CO 73 

JANETTE    MFG.    CO 70 

KEN-RAD   TUBE   &   LAMP  CORP 73 

LE0T0NE    RADIO    CO 75 

MALL0RY   &  CO.,    INC.,    P.R 1 

MEISSNER    MFG.    CO 65,  Cover  III 

NATIONAL    UNION    RADIO    CORP 63 

NOBLITT-SPARKS   INDUSTRIES,    INC 29 

0HMITE     MFG.    CO 71 

0NAN   &  SONS,    D.  W 64 

PHILC0    RADIO   &  TELEV.   CORP. ..  .7,  S,  40,  41 

PIONEER    GENEM0T0R    CORP 65 

THE   PORT-0-MATIC  CORP 47 

PRESTO   RECORDING    CORP 46 

PROGRESS  LECTRO-SHAVE    CORP 58,  62 

RADIO  CORP.  OF  AMERICA  20 

RADIO   SERVICEMEN    OF   AMERICA,    INC...  68 

RAD0LEK    CO 75 

RAYTHEON    PRODUCTION   CORP 5 

RCA    MFG.    CO.,    INC.,   VICTOR    D IV..  .27,  36-39 

RCA    MFG.    CO.,    INC 31,  55,  60,  65 

READRITE   METER  WORKS    54 

REC0T0N    CORP 48 

REGAL  AMPLIFIER   MFG.   CORP 67 

RIDER.    JOHN    F 69 

SERVICE    INSTRUMENTS,    INC 57 

SIMPSON    ELEC.    CO .   69 

SOLAR    MFG.   CORP 74 

SPRAGUE    PRODUCTS    CO 61 

STARK    ELEC.    INSTRUMENTS    72 

STEEM    ELECTRIC    CO 25 

TRANSDUCER    CORP.    (Tilton    Elec.) 75 

TRIPLETT  ELEC.    INSTRUMENT  CO 49 

TUNGSOL  LAMP  WORKS.   INC 61 

WARD    LEONARD    ELEC.    CO 65 

WARD   PRODUCTS  CORP 64 

WESTINGHOUSE    MERCHANDISING     HQRS..   45 
WHOLESALE    RADIO   SERVICE   CO.,    INC....   66 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against  the 
possibility  of  an  occasional  change  or 
omission    in    the    preparation    of    this    index. 


74 


Radio  Today 


'BULLET7 

ELECTRO-DYNAMIC 
MICROPHONE 


IMPROVED  MODEL  MK-31 


•  FAMOUS  BULLET  METAL  CASE 

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•  HIGH  OR  LOW  IMPEDANCE 

•  SIZE  2"  by  3" 

•  WITH  25  FOOT  CABLE 

List  Price   *2750 

Designed   and   Developed   by 

TRANSDUCER  CORPORATION 

Exclusive    Distributors 

TILTON  ELECTRIC  CORP. 

IS  EAST  26TH  STREET  NEW  YORK 

Ex-Stat  Products  Bullet  Microphones 


NEW  CATALOG  ON   REQUEST 


<?ut  FREE  SERVICE 
TO  THE  : 
BONE 


Free  "Recalls"  are  where  your  profits  go. 
Cut  them  to  a  minimum  by  using  our 
complete  line  of  Replacement  Transform- 
ers. Available  in  exact  duplicate  or  uni- 
versal mounting  to  fit  all  types  of 
Radio    Sets. 

PRICED  RIGHT! 

We  are  "there"  with  the  right  price,  and 
fast,  dependable  service  when  you  need 
it  most.  Don't  fail  to  send  for  your 
Free    Catalog   showing   the    complete    line. 

FREED 

THE  REPLACEMENT  KING 


SALES  AID 


PRESENTING  "PEAKED"  TUBES 

A  window  display  in  three  pieces  and 
four  colors  has  been  brought  out  by 
the  Sales  Dept.  of  Triad  Mfg.  Co.,  Inc.. 
Pawtucket,  R.  I.,  to  aid  dealers  and 
jobbers  in  putting  over  the  company's 
"peaked"  radio  tubes. 


10  PLAYS  TO  A  NEEDLE! 

Full-colored  display  card  of  conven- 
ient counter  size  has  been  released  by 
Recoton  Corp.,  178  Prince  St.,  New 
York  City,  to  show  the  public  that  the 
Recoton  needle  with  the  special  shaft 
and  rounded  point  is  a  quality  item. 
The  phrase  "10  Plays  to  a  Needle"  is 
featured  on  the  card,  which  is  easeled 
and  also  punched  for  hanging. 


FOR  FALL 
TUBE-SELLING 

A  gayly  colored  window  display 
unit,  which  invites  people's  interest 
by  using  a  virgorous  football  theme, 
has  been  prepared  by  Hygrade  Syl- 
vania.  It  ties  in  with  the  widespread 
listener-interest  in  the  coming  grid- 
iron clashes,  which  begin  Sept.  24  and 
end  in  December. 

Also,  the  company  has  released  a 
smaller  counter  card,  with  cut-out  let- 
ters and  glistening  green  foil,  to  add 
life  to  sales  counters. 

Sylvania  has  also  issued  a  new  give- 
away item  for  dealers,  which  further 
cashes  in  on  the  football  interest. 
This  is  a  complete  1938  football  sched- 
ule, a  season-long  score  sheet  for  over 
400  games,  in  booklet  form.  It  has 
space  for  dealer  imprint  on  the  front; 


FREED    TRANSFORMER    CO. 


76  SPRING   STREET 


NEW  YORK,  N.  Y. 


blanks  for  local  game  scores  on  the 
back.  Come-in-and-get-one  window 
streamers  are  furnished  with  orders  on 
the  booklets. 


SPECIALISTS     FOR     17     YEARS     IN 

CONES  and  FIELD  COILS 
and  Hard-to-Get   PARTS 

OUR  1939  catalog  No.  33  has  36  pages,  of  which 
half  is  devoted  to  cones  and  field  coils;  the  bal- 
ance to  hard-to-get  parts.  Includes  replacements  for 
speakers,  dials  and  scales,  pickups,  mikes,  etc.  Be 
sure   to   get   YOUR    copy. 

We  are  the  oldest  and  largest  manufacturers  of 
cast  replacement  parts  for  obsolete  and  up-to-date 
receivers.  Hundreds 
of  items  in  our  new 
catalog — hundreds  of 
OTHERS  in  stock  in 
our  6-story  factory. 
If  you  need  a  hard- 
to-get  part,  send  de- 
scription or  sample. 
If  not  in  stock,  we 
will  duplicate. 
Our  parts  are  often  Curvilinear  and  paracurve 
better  than  originals.  conef  for  ANY  cone-type 
speaker. 


Field    coils    on    bakelite 
bobbins  for  all  dynamic 

speakers. 


(Freed-Eisemann 
No.    24-46) 
Typical     hard  -  to  -  get 
casting — one  of  thou- 
sands that  we  supply. 


LEOTONE    RADIO    CO. 

63   Dey  Street  New   York,   N 

Cable  address— Leotone   New  York 


•  Everything  you  need  in  radio.  It's  all  in 
this  new  1939  RAD0LEK  RADIO  PROFIT 
GUIDE.  Every  repair  part  for  every  receiver. 
Every   item   guaranteed. 

•  Over  3000  new  items  to  bring  you  new 
ideas  in  conducting  your  business.  Includ- 
ing amateur  receivers  and  transmitters,  new  model 
P.  A.  systems  and  amplifiers,  latest  model  radio 
receivers,  test  equipment,  power  tools,  electric 
appliances  and  toys. 

•  And  everything  under  one  roof.  You  get 
what  you  want  promptly,  and  exactly  what 
you  want.  Radolek's  immense  stock  plus  Radolek's 
efficient  organization  insures  you  fastest  service. 
Send  now  for  your  copy  of  Radolek's  Radio  Profit 
Guide. 

Gfo  R ADOLEK" e^ 

601 W.  Randolph,  Chicago,  Dept.  D-23 

Send    me    the    new    1939    Kadolek    Profit    Guide 

FREE. 

Name    

Address    . . 
Serviceman ': 


Q        Dealer?  fj        Experimenter?  □ 


September,  1938 


75 


PUSH  UP  TO 
INCREASE 

HIGHS; 
PUSH  DOWN 
TO  INCREASE 

LOWS 


IMPROVES    ANY 

"LOW-COST" 
INSTALLATION 
ON  4  COUNTS! 

P.A.  Men,  you  can  im- 
prove those  "price" 
jobs  by  using  the  popu- 
lar Amperite  Model 
RAH  (or  RAL).  You  will  get  better 
results  because:  (1)  it  is  excellent  for 
both  speech  and  music;  (2)  has  flat 
response  without  undesirable 
peaks;  (3)  reduces  feedback;  (4) 
stands  up  under  rain,  wind,  heat, 
and  rough  handling  .  . .  Frequency 
range  60  to  7500  CPS.  Output  -68  db. 
MODEL  RAH  (hi-imp);  with  12'  of 
cable;  MODEL  RAL  (200  ohms)  with 
8'  of  cable $22.00  LIST 


AMPERITE 

i     ACOUSTIC  COMPENSATOR 


(pat.  pend.) 


qivel  IfOU 

HIGH  OR  LOW  PITCH 


WITH   THE    SAME    MICR0PH0N 


)NE 

realize  a 


larger  profit  on  each  job.  you  must  offer  added 
value  in  new  features.  Realizing  this,  Amperite  gives 
impensqtor  .  .  .  at  no  extra  cost 
to  you/  ^^^^ 

isive  feature  which  enables  you  to  (1)  lower  or 
response  of  the  microphone;  (2)  adjust  for  close  talking 

Pant  pickup;  (3)  adapt  microphone  to  varied  conditions. 
HESE  4  MODELS  HAVE  THE  ACOUSTIC  COMPENSATOR 

MODEL  RBHk  (hi-imp);  RBMk  (200  ohms)  Frequency  range  40  to 
11000  CPS.  Output  -65  db. .'. .  .Chrome  or  Gunmetal .  .$42^0  LIST 

NEW !  MODEL  RSHk  (hi-imp);  RBSk  (200  ohms)  Frequency  range  60 
to  8000  CPS.  Output  -68  db Chrome  or  Gunmetal.  .$32.00  LIST 

All  of  the  above  are  complete  with  Acoustic  Compen- 
sator, Switch,  Cable  Connector,  and  cable. 

NOTE:  Roth  Sound  Service  writes 'Tour  rnifces  are  certainly 

rugged.  Tve  used  them  In  rain,  wind,  and  on  (he  holiest  days, 
but  they  ve  always  stood  up  perfectty". 


MAKE  EXTRA  SALES  WITH 
CONTACT  MIKES...$12.00UST 

Professional  and  amateur  musicians  are  delighted 
with  the  Amperite  Contact  Microphone.  It  "makes 
an  ordinary  violin  sound  like  a  Strad"  . . .  gives  a 
small  piano  the  tone  of  a  grand.  And  yet,  there  is 
no  distortion.  No  unnatural  effects.  No  "fingering 
noises".  .  .  .  Frequency  response  40  to  9000  CPS. 
Output  -40  db.  20'  of  cable. 

Models  listed  below  can  be  used  on  most  radio 
sets  since  1935  and  on  all  P.A.  Systems.  They  oper- 
ate with  either  high  or  low  gain  amplifiers.  Instal- 
lation is  simple  .  .  .no  changes  in  strings  or  instru- 
ments . . .  attached  without  tools. 

MODEL  SKH  (Hi-imp);  SKL  (200  ohms) .  $12,1 
SKH  or  SKL  with  foot-operated 

volume  control .^^fT. 

Professional  Model  KTHJafOTL) $22.00  LIST 


A  COMPACT 
VELOCITY 
foi  hand  or  stand 

Though  only  a  little 
larger  than  a  match 
box,  this  Amperite 
Velocity  has  the  tea' 
tures  of  the  larger 
microphones.  Good 
for  speech  and jnu^fl 
use  on  stand^m 
exceJigjrfn 

ffortable  pistol  grip. 
Frequency  response  60  to  7500  CPS. 
Output  —70  db.  Complete  with 
switch,  cable  connector,  and  25'  of 
cable. 

MODEL  ACH  (hi-imp); 
or  ACL  (200  ohms) $25.00  LIST 


ei  Gids  fax  the  P. 


nperite  offers  the  following  co-operation  to  P.A.  Men. 

(1.)  FREE  Window  DecaM 

colors.  (2j  FREE^tfidow  Display,  11x17.  (3.)  Special  Sound  Equipment  Letterheads.  Samples 
and  prices^HrTecruest.  (4J  FREE  use  of  cut  for  printing  business  cards,  etc. 

Write  /or  Ihese  valuable  sales  helps,  and  new  Illustrated  Bulletins,  today! 


[MPERITE  (g.  5G1   BROADWAY.  N.  Y.    U.S. 


CABLE  ADDRESS    I 
ALKEM.  NEW  YORK  I 


AM  Pi  RITE 


MICROPHONES 


76 


Radio  Today 


^wLzi/muiiAuMnant/Jiscemh 


Push-Button  selection   of   7    favorite 
stations   plus   volume   control   from   any   convenient   location! 

Simply  connect  to  the  aerial  and  ground  posts  of  any  receiver 
by  means  of  a  special  15 -foot  cable  supplied,  and  plug  into 
any  110  volt  AC  or  DC  outlet!  A  turn  of  the  fingers  sets 
each  button  to  a  station — permanently. 

Each  Remote  Control  comes, 
complete  with  tubes,  all 
tested  and  ready  to  operate. 
Housed  in  a  handsome  light 
Walnut  cabinet  AT/z"  high, 
5%"  wide,  9i:'id"  long.  Re- 
tails for  only  $26.50. 

Write  Dept.  T-9  for  full  details 
on  the  Meissner  Remote  Control 
and  Push-Button  Converter  units. 


OUS     NAME     FOB     TWO     DECADES" 


OST  SENSATIONAL  FEATURE! 


with  TIME-TUNING 


THE    RADIO 

rHAT  TUNES  ITSELF 


MOTOROLA  MODEL  S9K-1 

NOTHING    TO    MATCH    IT   FOR   VALUE 

The    Biggest    "Package"    in     Its 

Price    Class 


MOTOROLA  MODEL  69K-1 

DE    LUXE    CONSOLE    GRAND    AT 

A    POPULAR    PRICE 

Exclusive     Push-Pull     Audio     System — 

10    Watts    Power    Output 


Automatically  TUNES   ITSELF 

to  ALL  YOUR  FAVORITE  PROGRAMS 
ALL  DAY  LONG  WITHOUT  ATTENTION 


• 
• 

• 


Will  Tune  as  Many  as  96  Dif- 
ferent Programs  in  24  Hours 
by  Itself 

Also  Turns  Itself  On  —  and 
Turns  Itself  Off  —  Automatic- 
ally 

Easier  to  "Set"  Than  a  Clock 
— Simplicity  Itself 


// 


No    Switches 

Turn 


or    Knobs    to 


tomatic  Tuning — and  also  Op 
erates  Manually 

The  Greatest  Radio  Develop 
ment  in  10  years — Dealers 
Everywhere  Agree  It's  the 
"  HOTTEST  "  Demonstratinc 
and  Selling  Feature  Showr 
This  Season 

ALL-IN-ONE"  Remote  Contro 


A  REAL  "3-IN-l"  RADIO— 
Combines  TIME  -  TUNING  — 
"Feather-Touch"  Electric  Au- 


Compact- -smaller  than  a  pack 
of  cigarettes.  Turns  set  ON 
and  OFF  --regulates  volume 
and  changes  stations  remote- 
ly —  automatically  —  without 
turning  any  knobs  or  switches 
at  set. 


See    l/out  Aiototola 
GALVIN    MFG.    CORPORATION  < 


» 


§ 


▲ 


IS 


h  Oct  ^o  ,,    wi 


crc 


ft 


All  About  the  New 

Scood!  "Mvsterv  < 


Controls' 


OCTOBER 

with    "Sellina    SminrT 


^  F0R  ww»JJS», 


fltioettV& 


-■■■  &  m^^--A~,-<\ 


MODEL  G-99 


Introducing  Two  Great   New   G-E   Radios 
for  the  Biggest  Selling  Season  of  the  Year 


The  two  new  G-E  Radio  models 
presented  here  will  help  you 
cash  in  on  extra  Fall,  Winter  and 
Christmas  business.  They  bring 
the  amazing  G-E  features  . .  .  the 
exclusive  built-in  Beam-a-scope 
and  Keyboard  Touch  Tuning 
.  .  .  into  new  big-volume  price 
brackets  . .  .  These  and  all  other 
G-E  Radio  models  are  sensa- 
tional in  features,  styling  and 
prices.  They  carry  discounts  that 
spell  big-profit  opportunity. 
They  are  backed  by  a  tremendous 
barrage  of  General  Electric 
4-color  advertising  in  ten  lead- 
ing magazines  ...  in  pages  and 
double  pages  .  .  .  that  will  reach 
more  than  33,000,000  readers 
plus  a  great  newspaper  campaign 
in  the  leading  markets  of  the 
country.  Get  in  touch  with  your 
G-E    distributor  NOW  ...  and 


tie  in  with  this  great  selling 
drive,  starting  this  month.  It 
pays  to  line  up  with  G-E  Radio. 

General  Electric  means-  business! 


G-E  TIME  TUHING 


G-f  "ADS  |N  SAlE, 


rHE  G-E  BEAM-A-SCOPE 

N°  aerials 
No   ground 
connections 
needed.  Re. 
du«s    local 
swtic  interfer- 
ence.   Gives 
qu'eter,   finer 
receprion 
especially  in 
noisy  areas.  It 
makes   the 
new  G-E  one 
5adio   that 
does  not  need 

r-t°ant^1nfiXed'°---^ 

P'"g  'tin  like  I&Zy  r°°m-  ■>"« 

'"P  •  •  •  anywhere. 


G-E  KEYBOARD  TOUCH  TUNING 


,cs   T,me  Tuning! 


GENERAL  ®  ELECTRIC 


Utterly  new!  A  tremendous  advance  in 
automatic  tuning.  Lightning  fast!  Your 
program  at  the  touch  of  a  key.  Easier 
tuning.  More  accurate  tuning.  A  great 
demonstration  feature  that  will  clinch 
extra  sales  for  you. 


RADIO 


■ 


MallorY 

*fp  ro\»i:.\si:its 


Completely  Standardized 

Fabricated 
Plate* 


New,  Compact  Trouble-Free 

Units   Having   Exceptional 

Range  of  Application 


Specified  for  original  equipment  by  leading  radio 
manufacturers,  new  Mallory  FP  Condensers  are 
now  available  to  radio  service  engineers,  ama- 
teurs and  experimenters.  They  are  ideal  for 
construction  purposes  and  for  all  service  applica- 
tions where  the  special  characteristics  of  these 
new  condensers  are  of  vital  importance. 

Two  years  of  research  and  intensive  development 
by  Mallory  engineers  have  gone  into  the  final 
perfection  of  these  revolutionary  Fabricated 
Plate  Condensers.  A  minimum  ratio  of  10  to  1 
accomplished  without  acid  etching  provides  ex- 
tremely small  sizes  without  squeezing,  or  sacrificing 
any  of  their  excellent  electrical  characteristics. 


Again    Mallory   provides    revolutionary  features. 

1.  Small  size  without  a  sacrifice  of  safety  or 

efficiency. 

2.  Low  R.  F.  Impedance.  Quieter  operation  of 

vibrator  powered  sets. 

3.  Long  life  due  to  chemical   purity  and  free- 

dom from  corrosion. 

4.  Surge  proof  construction  obtained  through 

new  separator  materials. 

5.  Better  filtering  efficiencv. 

G.  Permanent  identification  of  condenser  ratings. 

7.  Improved  performance  for  battery  sets  with 

minimized  battery  drain. 

8.  Improved  sealing  against  unusual  humidity 

or  heat. 


of 


IJITHMlJUimi 


i. 


^ 


■/■■.. 


ALLOR 

Fabricated  Plate  Tubular  Condensers 


TYPE   BB 


New  Mallory  Type  BB  Condensers,  with  exclusive  Fabricated  Plate  con- 
struction offer  in  a  "tubular"  all  the  typical  advantages  of  the  Mallory  FP 
Condenser.  Made  with  a  one  piece  drawn  aluminum  can  and  covered  with 
heavy,  deeply  embossed  cardboard  tube  for  rating  identification.  Equipped 
with  heavy  leads  .  .  .  no  thin  foil  tabs. 

YOLR  DISTRIBUTOR  HAS    COMPLETE   INFORMATION  ON 
THESE  TWO  AMAZING  NEW  CONDENSERS.  SEE  HIM  TODAY. 


I  P.  R.  MALLORY  8.  CO. Inc. 


H 


REPLACEMENT 
CONDENSERS. . .  VIBRATORS 


P.  R.  MALLORY  &  CO.,  Inc. 
INDIANAPOLIS  INDIANA 

CABLE  ADDRESS— PELMALLO 


RADIO  TODAY.  October,  1938,  Vol.  IV,  No.  10,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription 
price  U.  S.  and  Latin  American  countries:  $1.00  for  2  years.  Canada:  $1.25  for  2  years.  All  other  countries  $2.00  for  2  years;  single  copy,  15c.  Entered 
as  second-class  matter  July  24.  1936,  at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.  Printed  in  U.S.A.  Member  of  A.  B  C. 
Copyright   1938   by   Caldwell-Clements,   Inc. 


TO  JOIfl 


mSS* 


Radio  Today 


40th  anniversary 


AUTOMATIC  RECORD  CHANGER 

A  marvel  of  gentle  yet  positive  action. 
Although  used  on  the  most  expensive 
Victrolas,  this  same  mechanism  is  a 
feature  of  this  40th  Anniversary  model! 


CRYSTAL  PICKUP, 
TOP-LOADING  NEEDLE  SOCKET 

Crystal  Pickup  offers  extended  musi- 
cal range.  Top-loading  Needle  Socket 
provides  jiffy  changing  of  needles  — 
without  pricked  fingers! 


IMPROVED  ELECTRIC  TUNING 

RCA  Victor  introduced  to  the  world 
Electric  Tuning  .  .  ."Push  a  Button  — 
There's  Your  Station!"  Again  RCA 
Victor  leads  with  a  finer,  faster  version 
of  this  famous  feature. 


CABINET  OF  EXQUISITE  DESIGN 

Available  in  either  Walnut  or  Mahogany 
For  forty  years,  the  products  of  RCA 
Victor's  cabinet  factory  have  been 
known  as  the  finest  in  the  industry  — 
heavier,finer,more  expertly  fashioned. 


12     DYNAMIC  SPEAKER 

Especially  designed  to  faithfully  repro- 
duce radio  and  recorded  music  of  this 
40th  Anniversary  instrument.  Deli- 
cately responsive  to  every  shading  in 
the  music  and  each  inflection  of  the 
human  voice. 


MODEL 

U-125 


A  remarkable  instrument  of  outstand- 
ing quality — offering  unheard-of 
value  to  prospects  and  untold  profit 
opportunities  to  RCA  Victor  dealers! 


"RCA  ALL  THE  WAY" 

An  instrument  made  by  the  makers  of 
Victor  Records,  radio  and  broadcast- 
ing equipment,  and  producers  of  fine 
radio  programs  (NBC). 


October,  1938 


.  ...  TO  JOl|\$#  1/tC&b<;  40th  ANNIVERSARY 


MM  ^-MHim^\ 


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GET  FULL  DETAILS  ON 
40th  ANNIVERSARY 
SALES    CELEBRATION 

FROM  YOUR  RCA 
VICTOR  DISTRIBUTOR 


3 

eo^Cciet?  ^r'vVic^  "V.  iecot 
a°*     a.   v»ot*  *     0,  noui  <^s 


ors  victor  R^k" 
For  liner  radio  performance-RCA  vie. 


RCAVu 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  j.  .  A  Service  of  the  Radio  Corporation  of  America 


• 


AUTOMATIC  RECORD  CHANGER 

A  marvel  of  gentle  yet  positive  action. 
Although  used  on  the  most  expensive 
Victrolas,  this  same  mechanism  is  a 
feature  of  this  40th  Anniversary  model! 


CRYSTAL  PICKUP, 
TOP-LOADING  NEEDLE  SOCKET 

Crystal  Pickup  offers  extended  musi- 
cal range.  Top-loading  Needle  Socket 
provides  jiffy  changing  of  needles  — 
without  pricked  fingers! 


r^"*« 


* 


. 


MODEL 

U-125 


A  remarkable  instrument  of  outstand- 
ing quality-offering  unheard-of 
value  to  prospects  and  untold  profit 
opportunities  to  RCA  Victor  dealers! 


IMPROVED  ELECTRIC  TUNING 
RCA  Victor  introduced  to  the  world 
Electric  Tuning. .  ."Push  a  Button  — 
There's  Your  Station!"  Again  RCA 
Victor  leads  with  a  finer,  faster  version 
of  this  famous  feature. 

CABINET  OF  EXQUISITE  DESIGN 

Available   In   cither  Walnut  or  Mahogany 

For  forty  years,  the  products  of  RCA 
Victor's   cabinet   factory    have    been 
known  as  the  finest  in  the  industry  — 
heavier,finer,more  expertly  fashioned. 

12"  DYNAMIC  SPEAKER 

Especially  designed  to  faithfully  repro- 
duce radio  and  recorded  music  of  this 
40th   Anniversary   instrument.    Deli- 
cately responsive  to  every  shading  in 
the  music  and  each  inflection  of  the 
human  voice. 

"RCA  ALL  THE  WAY" 

An  instrument  made  by  the  makers  of 
Victor  Records,  radio  and  broadcast- 
ing equipment,  and  producers  of  fine 
radio  programs  (NBC). 

Radio  Today 


October,  1938 


:~::\:,**i 


ith 


tfr* 


ttt* 


1 


i 


Your  major  concern  in  selling  radios,  is  to  make 
a  profit.  Profit  depends  largely  upon  the  product  you  select 
and  the  localized  promotional  activity  behind  it. 

So  Westinghouse  has  designed  a  line  of  radios 
that  look  and  are  VALUES  .  .  .  and  packed  them  with 
features  easy  to  talk  about,  demonstrate  and  sell!  Backing 
this  quality  radio  line  is  a  merchandising  program  expressly 
planned  for  your  local  use  .  .  . 

Twenty  cooperative  newspaper  advertisements 
establish  you  as  Westinghouse  Radio  Headquarters!  There 
are  publicity  articles,  radio  shorts,  2-color  selling  book, 
colorful  floor  and  window  displays,  consumer  folder  and 
other  profit-building  helps.  This  business-getting  program 
is  building  profitable  sales  for  dealers  every  day.  Call  your 
local  Westinghouse  Representative  for  complete  details. 

Don't  miss  this  one! 


Above— Model  WR-158  for  AC- 
DC  operation.    Model  WR-258 
same  as  above,  for  AC  only. 
Right— Console  Model  WR-368. 


Merchandise  Headquarters — Westinghouse  Radio — 150  Varick  Street,  New  York,  N.Y. 


Westinghous4^jjJ 


Radio  Today 


A 


RAYTHEON  RADIO  TURES 


"WORLD'S 


ARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS" 


October,  1938 


Exquisite  new  Spinet  style 
console  of  rare- grained 
walnut  gives  this  PHONO- 
GRAPH WITH  PHILCO  in- 
stant sales  appeal  to  the 
quality  market. 


With  (?aft 


Like  a  salesman's  dream  come  true,  this  PHONOGRAPH  WITH  PHILCO 
116PCX  combines  every  quality  feature  in  one  instrument.  The  famous 
PHILCO  "116"  radio  plus  CAPEHART  Automatic  Record  Changer... 
plus  PHILCO  Mystery  Control  .  . .  and  in  the  new  Spinet  type  console 
that  sets  the  style  for  1939  combinations!  Demonstration  of  the  11 6PCX 
is  the  sure  way  to  capture  the  quality  market... and  greater  profits  ! 


(Bc/owJ  Top  lid  of  116PCX  Lifted  to  Show  Instrument  Panel  and  Record  Changer 


New  1939  Mode!  116PCX-*395* 

Complete  with  Mystery  Control 

*Price  slightly  higher  in  the  West 

See  Your  PHILCO  Distributor 


Radio  Today 


■WS3**- 


Here's  what  one  of  the  coun- 
try** leading  radio  dealers 
says  about  Phileo  Tube  sales: 

"I  consider  replacement  tube 
sales  the  'bread-and-butter'  of  my 
business,  because  they  bring  me 
sure,  steady,  day  in  and  day  out 
profits.  Furthermore,  I  concen- 
trate on  Phileo  tubes,  because  I 
find  that  the  prestige  and  public 
acceptance  of  the  name  Phileo 
makes  them  the  easiest  tubes  in 
the  world  to  sell." 

Don't  neglect  the  year  'round, 
profitable  tube  replacement  busi- 
ness! Cash-in  on  Philco's  over- 
whelming popularity  .  .  .  and  fill  M^l 
your  pockets  by  filling  sockets 
with  PHILCO  TUBES! 


s 

s 


WHILCC 


RfC     V    S     PATO"- 

RADIO 
TUBE 

•  •   • 


C0/?POAAT/0NfH/lA.PA.U^ 


Uf 


&1Qo*/otfr$Ul 


HARRV  BOYD  BROWN 

National  Merchandising 
Manager  of  Philco 


First  Returns— As  We  Go  To  Press  — 


On  Public  Response  To 
Philco  Mystery  Control 

AT  this  moment — in  local  newspapers  throughout  America — 


Philco  dealers  are  making  their  first  announcements  of 
Philco  Mystery  Control  to  the  public.  By  the  time  this  publica- 
tion reaches  you,  the  actual  results  of  this  advertising  will  be  a  matter  of  history. 

But  even  now — as  I  write  this  editorial — early  exhibits  and  demonstrations 
of  Mystery  Control  already  have  created  an  amazing  wave  of  public  interest, 
excitement  and  response.  Now  the  retail  buying  public  will  get  the  thrill  that 
you  folks  in  the  trade  got  4  months  ago. 

As  this  paper  goes  to  press — it  is  too  early  for  me  to  give  you  any  figures  on 
the  newspaper  advertising  results.  However,  here  are  some  exciting  advance 
experiences  in  public  reaction  to  Mystery  Control — the  result  of  demonstra- 
tions at  Fairs  and  Expositions  early  in  September. 

"The  management  of  the  Washington  County  Fair  at  Hoosick  Falls,  New  York, 
requested  Mystery  Control  as  one  of  the  acts  of  the  big  vaudeville  show  at  the  Fair 
Grounds,"  writes  William  J.  Rouditis  of  the  HoosickRadio  Service, " and Mystery 
Control  was  the  sensation  of  the  show.  After  the  demonstration,  it  seemed  to  me  that 
the  entire  crowd  in  the  grandstand  swarmed  over  to  our  Philco  booth." 

A  Sanford,  Maine  dealer  sold  1 2  Mystery  Control  models  during  a  3-day 
demonstration  at  a  County  Fair.  More  than  1 00,000  people  witnessed  a  dem- 
onstration of  Philco  Mystery  Control  at  the  New  York  State  Fair  in  Syracuse. 
Every  Philco  dealer  was  entirely  sold  out  of  Mystery  Control  models  within  24 
hours  and  back  orders  were  piling  up. 

Philco  Mystery  Control  stopped  the  show  at  the  Elgin  Merchants  and  Manu- 
facturers Exposition  in  Elgin,  Illinois,  last  week.  It  was  exhibited  and  demon- 
strated by  the  Kimball  Furniture  and  Rug  Corporation  of  Elgin.  And  here  is 
what  Mr.  D.  C.  Williams  of  the  Kimball  Store  writes  us: 

"Without  asking  one  single  person  to  buy,  18  people  left  their  names  and  addresses 
and  asked  us  to  deliver  a  Philco  Mystery  Control  model  to  their  home.  In  addition, 
over  100  people  left  their  names  and  addresses  with  the  request  that  we  come  to  their 
home  and  appraise  their  old  radios. 

"In  my  iy  years  of  selling  radios,  it  is  the  first  time  I  have  ever  had  the  thrill  of 
such  an  experience — 18  bona  fide  customers  plus  100  golden  prospects  with  hardly  a 
word  of  selling  pressure  on  the  part  of  our  salesmen." 

Yes,  in  Philco  Mystery  Control  the  retail  radio  dealer  has  a  traffic-getter 
without  parallel  in  the  radio  industry — an  advertising  attraction  so  new  and 
so  revolutionary  it  will  pack  your  store  with  truly  interested  prospects. 


PHttC 


^pl^UU«--(  ^^vj^L/ v2i<r-u^-rs-^_ 


Radio  Today 


OCT 


2* 


5  1938 


©C1B    393R77 


Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton   K.    Ulrich 


M.  E.  Herring 

Sales  Manager 


R.     Y.      FIT2PATRICK 

201   N.  Wells,  Chicago,  111. 


Orestes  H.  Caldwell 
Editor 

M.  Clements 
Publisher 


Vol.   IV,   No.    10 
Copyright  1938 

Caldwell-Clements.    Inc. 

Tel.  Plaza  3-1340 

480   Lexington   Ave. 

New  York,  N.  Y. 


Member  Audit  Bureau  of  Circulations 


A  FALL  WITH  A  FILLIP 

For  radio,  the  season  is  to  have 
snap. 

Pre-holiday  buying  has  begun,  gen- 
eral war  has  been  averted,  strikes 
have  been  settled,  the  World  Series 
helped,  and  the  broadcasters  have 
started  a  terrific  breed  of  winter  en- 
tertainment. The  football  broadcast 
season  is  likewise  under  way. 

September  gave  the  radio  business 
a  brisk  boost,  during  the  war  scare 
in  Europe,  by  establishing  itselt  as 
a  dramatic  No.  1  source  of  news. 
People  sat  around  by  the  hundred, 
nudging  their  radios  for  more  reports 
from  abroad.  Many  were  finally  con- 
vinced that  a  good  receiver  deserves 
the  center-spot  in  streamlined  life; 
many  extra  persons  began  to  feel  the 
importance  -of  consistent  listening. 

INKLING  ON  INVENTORIES 

Those  who  have  access  to  the  week- 
ly figures  on  receiver  production  and 
stocks,  conducted  among  certain  co- 
operating radio  manufacturers,  report 
that  while  inventories  as  a  whole  are 
in  good  shape,  the  number  of  consoles 
on  hand  in  stockrooms  of  manufac- 
turers and  wholesalers  is  accumulat- 
ing at  a  rate  which  is  causing  some 
concern.  Advent  of  the  holiday  buy- 
ing season  is  expected  to  help  correct 
this  situation. 

Condition  of  stocks  in  retail  outlets 
classified  as  "radio,  electrical  and  gas 
household  appliances"  is  shown  in 
Dun  &  Bradstreet's  recent  check-up 
among  354  concerns.  During  the  first 
six  months  of  1938,  inventories  here 
decreased  by  4.4  per  cent.  During 
the  years  1936  and  1937,  the  increase 
had  been  57.5  per  cent,  in  this  same 
group.  It  was  found  that  in  56.5  per 
cent  of  the  stores,  this  year,  a  de- 
crease in  inventory  had  taken  place. 

Among  the  manufacturers  of 
radios,  with  which  are  grouped  the 
makers  of  appliances  and  electrical 
tools,  the  6-month  inventory  drop  was 


3.2 


a.zj  per  cent,  while  during  the  last  two 
years  the  increase  had  been  69.2  per 
cent. 


SEE  6,000,000  SETS  FOR  1938 

With  general  business  recovery  re- 
flected in  the  sales  of  radios  and  par- 
ticularly in  the  demand  for  small  sets, 
students  of  industry  statistics  now 
predict  sales  of  at  least  6,000,000  ra- 
dios during  1938.  This  will  be  a  25 
per  cent  drop  below  the  8,000,000  fig- 
ures for  1937,  but  represents  a  better 
showing  than  had  been  expected 
earlier  in  the  year. 

While  the  year  started  out  about 
50  per  cent  off,  there  has  been  a  gain 
in  the  rate  of  set  production,  though 
the  dollar  total  will  probably  remain 
around  the  half-way  level. 

Already  radio  suppliers  report  that 
their  present  sales  to  set  manufac- 
turers approximate  those  of  last  year 


at  this  season.  In  the  case  of  the 
smaller  AC-DC  sets,  production  seems 
to  be  actually  exceeding  last  year, 
bringing  the  expected  total  up  to 
•6,000,000  sets  .of  all  classes  for  the 
1938  twelve  months. 

THANK  YOUR  LUCKY 

Whatever  you  say  about  the  Amer- 
ican radio  system,  it  is  still  bravely 
and  splendidly  free.  Eadio  is  loose 
from  the  government,  responsible  for 
its  own  health  and  enterprise.  This 
appears  to  be  a  happy  practice,  when 
you  notice  what's  going  on  in  license- 
laden  Europe. 

In  Great  Britain,  you  have  to  be 
blind  to  be  able  to  listen  to  the  radio 
without  paying  for  a  license.  (Eng- 
land has  extended  this  courtesy  to 
50,000  blind  persons — willingly,  we 
hope.)  Otherwise  the  listeners  are 
encouraged  to  pay  and  to  pay  prompt- 


TWO  TO  FOUR  RADIOS  PER  HOME,  AND  15-MILUON-SET  YEARS! 


4   RADIOS  PER  HOME. 


3    RADIOS  PER  HOME. 


2    RADIOS   PER  HOME. 


|i  RADIOS  PER- 
*       HOME 

INCLUDING  AUTO 
RADIOS 


IOO 

MILLION 
SETS 


64 

MILLION 
SETS 


140 

MILLION 
SETS  . 

35  MILLION 
HOMES 

1948  ? 

Discussing  radio's  future,  an  article  presented  on  a  following  page,  predicts 
"three  to  six  sets  per  home"  and  possible  15-million-set  years.  Above  chart 
shows  national  totals  resulting  from  such  extra  sets  per  home;  also  years  re- 
quired, at  15  million  sets  per  year,  to  build  such  intensity  of  radio  convenience. 


October,  1938 


ly;  there's  a  stiff  fine  if  they  don't. 
And  recently  in  London,  radio  sets 
have  been  abruptly  confiscated  for 
failure  to  get  the  license. 

Extent  of  the  license  racket :  Ger- 
many 9,514,000,  Great  Britain  8,650,- 
000,  and  France  4,500,000.  It's  to  be 
supposed  that  Benito  is  doing  pretty 
•well,  too. 

DEALERS  60  TO 
COLLEGE 

Badio  has  become  profitably  inter- 
ested in  the  college  market.  The  facts 
are  that  there  are  approximately  650 
universities  and  colleges  in  the  coun- 
try, with  1,350,000  students  enrolled 
in  them.  Most  persons  who  can  af- 
ford to  go  to  college  can  afford  to  buy 
a  table  model  radio,  if  the  color  and 
the  style  suit. 

As  for  the  matter  of  color,  it  is  now 
convenient  for  dealers  to  order  the 
exact  color  combinations  appropriate 
for  their  particular  localities.  Some 
colleges  use  a  single  color;  some  use 
three.  The  most  popular  combination 
is  blue  and  white;  there  are  47  uni- 
versities which  use  this  pair.  Some 
of  the  main  ones  are  Brigham  Young, 
Buffalo,  Connecticut  State,  Creigh- 
ton,  Drake,  Dubuque,  Duke,  Elm- 
hurst,  Howard,  New  Hampshire 
State,  Notre  Dame  (Md.),  Pennsyl- 
vania State,  Pomona,  Teachers  Col- 
lege (Columbia),  Utah  State  Agri- 
cultural, Villanova,  Washburn,  and 
Washington  &  Lee. 

Between  now  and  December,  while 
the   major  collegiate   football   clashes 


Into  Ketchikan,  Alaska,  radio  shipments  now  come  by  airplane.     Here's  a  plane- 
load of  Zeniths  for  Ketchikan's  Service  Electric  Company,  being  receipted  for  by 
George  Beck,  while  airways  officials  look  on. 


are  being  held,  is  an  excellent  pro- 
motion period  for  dealers.  These  pros- 
pects like  their  sports  broadcasts.  Also 
it  will  be  found  that  the  eollegiates 
are  always  interested  in  dance  music. 
Many  of  the  most  eager  "jitterbugs" 
are  to  be  found  on  the  LT.  S.  campus. 

PRACTICALLY  6  MILLION  PIANOS 

They  tell  the  story  about  a  news- 
paper notice  which  ran  like  this :  "For 
sale — a  piano  by  a  divorcee  with  ma- 
hogany legs." 

Anyway,  it  is  true  that  most  pianos 
are   outmoded.     The    National    Piano 


David  Sarnoff,  just  back  from  Europe  in  time  for  RCA-Victor's  40th  Anniversary 

Celebration,  reports  that  television  abroad  has  nothing  in  advance  of  television  in 

the  U.S.A.     Here  "DS"  is  showing  a  guest  RCA's  newest   projection-television 

equipment,  for  large-screen  pictures. 


Manufacturers'  Association  recently 
took  a  census  and  found  that  the  av- 
erage age  of  pianos  now  in  use  is  18 
years.  And  about  10%  are  over  30 
years  old. 

The  census  also  revealed  that  there 
are  5,865,296  instruments  now  active 
in  H.  S.  homes.  In  the  higher  income 
brackets  the  ownership  runs  53.4%, 
and  in  homes  with  children,  56% 
have  pianos. 

The  Association  points  out  that 
nearly  800,000  families  are  thinking 
about  buying  a  piano.  Badio  men  are 
hoping  that  a  good  part  of  these  will 
use  radio  tubes  in  one  form  or  other. 

INSTALMENT  SALES 

An  interesting  trend  in  instalment 
sales  has  been  revealed  by  A.  E.  Dun- 
can, of  Commercial  Credit  Co.,  who 
has  been  studying  the  relation  of  re- 
tail credit  to  general  prosperity. 

Figures  estimated  by  the  TJ.  S.  Bu- 
reau of  Foreign  and  Domestic  Com- 
merce are  quoted  to  show  what  per 
cent  of  all  retail  sales  are  made  on 
time : 

1937    12.2% 

1936    11.8% 

1935    10.9% 

1929    13.0% 

Mr.  Duncan  also  declares  that  "a  40 
per  cent  drop  in  all  retail  sales,  during 
a  depression,  based  on  1937  figures, 
means  a  drop  of  4.88  per  cent  on  all 
instalment  sales;  but  it  would  also 
mean  a  drop  of  35.12  per  cent  in  re- 
tail sales  made  for  cash  or  on  open 
credit." 

The  conclusion  in  that,  "the  drop 
in  volume  of  sales  for  cash  or  open 
credit,  and  not  the  drop  in  instalment 
sales,  causes  and  prolongs  a  business 
depression." 


10 


Radio  Today 


"INCLUDING 

ON  PAN 


BALLAST  TUBE" 


The  National  Better  Business  Bu- 
reau, Chrysler  Building,  New  York 
City,  has  just  addressed  a  letter  to  28 
radio  receiver  manufacturers  regard- 
ing the  use  of  such  receiver  descrip- 
tions as : 

"6  tubes  (including  one  ballast 
tube)." 

George  L.  Burkle  of  the  Bureau 
points  out  that  since,  by  R.M.A.  defi- 
nition, a  ballast  .unit  cannot  be  cor- 
rectly defined  as  a  "tube,"  such  a  de- 
scription as  above  is  misleading.  The 
Bureau  has  asked  for  B.M.A.  action 
in  this  situation,  threatening  to  put 
the  issue  before  the  Federal  Trade 
Commission,  and  has  received  the  sup- 
port of  individual  manufacturers  iu 
agreeing  to  desist. 


DON'T  WORRY  ABOUT 
THE  COVER 

Except  from  the  prowling  eyes  of 
readers,  the  blonde  article  on  the 
front  cover  of  this  issue  is  quite  safe. 
It's  true  that  she's  surrounded  by 
water,  worse  luck,  and  that  she's 
fiddling  with  an  electrical  device. 
Electrical  appliances  are  usually  con- 
sidered hazardous  to  touch  in  a  bath- 
tub. But  the  PhilCo  "mystery  con- 
trol" is  a  device  that  can't  shock  any- 
body, 'wet  or  dry. 

You  can  be  sure  that  Radio  Today's 
girl  friend  is  being  treated  properly. 
She  doesn't  even  have  to  do  her  own 
bath-tub  singing.  She  can  dial  the 
radio  in  the  next  room  until  she  gets 
just  the  right  tune. 

And  if  you  like  the  gal-in-the-bath- 
tub  idea,  maybe  next  month  we'll  put 
the  control  box  on  a  high  shelf. 


KEEP  AFTER  NEW  CUSTOMERS 

Speaking  before  the  Philadelphia 
Badio  Servicemen's  Association  in 
June,  Harry  P.  Bridge,  advertising 
counsellor  for  International  Resist- 
ance  Company  and  several  other  radio 
component  manufacturers,  urged  that 
servicemen  consistently  spend  not  less 
than  5  per  cent  of  their  gross  receipts 
for  some  form  of  advertising. 

"Five  per  cent  should  be  a  minimum 
for  promotional  activities,"  said  Mr. 
Bridge.  "As  a  matter  of  fact,  the 
smaller  you  are,  the  greater  your 
need  for  additional  customers,  the 
more  you  ought  to  be  spending. 

"Up  to  the  present,  all  of  the  em- 
phasis seems  to  have  gone  to  the  tech- 
nical side  of  servicing.  That  is  basic. 
No  one  will  deny  its  importance.   The 


GE's  big  guns  of  merchandising  broadcast  a  sales  message  to  their  distributing 

organization.     From  left,  Ralph  Cordiner,  Chester  Lang,  and  Carl  Snyder,  with 

exec-vp.  C.  E.  Wilson  at  mike. 


thing  to  remember,  however,  is  that 
the  best  technician  in  the  world  may 
still  be  a  complete  flop  if  he  is  not  a 
good  businessman  to  boot. 

"There  is  an  axiom  in  retail  mer- 
chandising that  ought  to  hold  just  as 
true  of  servicemen  as  it  does  of  any 
store.  This  is  to  the  effect  that  a 
business  must  contact  its  own  weight 
in  new  customers  every  year  if  it  is  to 
show  continued  growth.  In  other 
words,  a  serviceman  who  has,  say,  250 
old  customers,  must  contact  at  least 
250  new  ones  every  year.  In  no  other 
way  is  it  possible  to  replace  the  old 
ones  who  die,  move  away  their  trade 


Vice-president    Sherman    R.    Hoyt    of 

Cinaudagraph    Corp.    is    now    general 

manager  of  the  firm. 


elsewhere — and    show     a     substantial 
profit  besides." 

Stating  that  no  other  trade  is  so 
richly  endowed  with  free  or  semi-free 
promotional  materials  available  from 
manufacturers,  Mr.  Bridge  urged  ser- 
vicemen to  make  the  fullest  possible 
use  of  them,  supplementing  material 
of  this  sort  with  their  own  original 
ideas,  in  order  to  maintain  a  point  of 
difference  between  themselves  and 
competition. 


RADIO  TODAY'S 
COAST-TO-COAST  BROADCASTS 

on 
"How  to  Get  Better  Radio  Reception" 

NBC  Blue  Network,  Thurs.,  Oct.  20 

11 :05  p.m.  E.S.T.— 10 :05  p.m.  C.S.T. 

NBC   Red  Network,  Mon,   Oct.   24 

11  p.m.  E.S.T.— 10  p.m.  C.S.T. 

By  Dr.  Orestes  H.  Caldwell 

Editor  of  Radio  Today 

Former  Federal  Badio  Commissioner 

These  broadcasts  are  designed  to 
help  listeners  put  their  receiving  sets 
in  100  per  cent  condition  for  the  fall 
programs,  by  means  of  (1)  correct  an- 
tennas, (2)  fresh  tubes,  (&)  replace- 
ment of  faulty  parts,  and  (4)  elimina- 
tion of  interference.  Listeners  will 
be  advised  to  call  in  their  local  radio 
man. 

Tune  In  on  these  Broadcasts,  and 
Tie  in  Your  Own  Service  and  Re- 
placement selling  with  this  Nation- 
wide Campaign  for  Better  Badio  Re- 
ception. 


October,  1938 


11 


NEW   MAGIC  TO   SELL 

Wireless     remote    ccntrol     for    radio    sets     amazes    buying    public 
Record-players  without  wires.  Practical  sales  points  dealers  should  know 


Every  line  of  business  needs,  from 
time  to  time,  a  "merchandising 
shock"' — something  startlingly  new  to 
arouse  the  interest  and  curiosity  of 
the  buying  public,  declares  a  famous 
authority  on  sales  promotion. 

Such  merchandising  shocks  stimu- 
late sales,  it  is  reasoned,  not  only  for 
the  particular  products  and  manufac- 
turers directly  involved  in  the  new 
offering,  but  also  for  the  whole  trade 
and  industry  in  any  way  connected 
with  the  new  development. 

On  such  a  basis,  everybody  in  radio 
should  benefit  this  Fall  from  the  dra- 
matic onslaught  of  radio's  new  "re- 
mote controls." 

Practical  miracles 

For  two  parallel  "miracles"  have  hit 
the  public's  consciousness  in  the  last 
few  weeks.     To  wit : 

1.  The  ability  to  tune  one's  radio 
set  from  a  distance,  control  its 
volume,  etc.,  all  without  wires! 

2.  The  operation  of  record-players 
having  no  direct  connection  with 
the  radio-set  and  loud-spealeer 
from  which  the  sound  issues. 

To  the  lay  mind,  these  twin 
miracles  are  additional  evidence  of 
the  practical  resourcefulness  and  in- 
genuity of  radio  men.  And  already 
the  public  is  buzzing  with  this  new 
challenge  to  its  curiosity — and  pocket- 
book! 


Radio      alarm!       Householders      find 
dozens  of  uses  for  the  electric  clock- 
radio   service  performed  by   Kadette's 
Autime 

Wives  are  asking  husbands,  "Have 
you  seen  that  wonderful  new  radio  set 
down  at  Bill's?"  In  dinner  groups 
and  evening  bridge  parties,  people 
are  talking  about  "the  new  phono- 
graphs that  play  through  your  radio, 
yet  without  any  attachment  to  it !" 

Store  traffic  builders 

To  sell  these  new  remote-control 
radios — as  with  automatic  combina- 
tions and  other  high-priced  merchan- 
dise— a  higher  hype  of  salesman  is 
needed.  Hence  the  radio  dealer  should 
see  that  he  employs  the  kind  of  man 
capable  of  closing  sales  of  sets  in  the 
higher  figures. 

Remote-controls  and  wireless  rec- 
ord-players represent  the  greatest  traf- 
fic-producers radio  has  had  in  years. 

But  it  will  not  be  enough  merely 
to  demonstrate  the  remote  control  in 


the  store  by  circus  methods.  After 
the  show  has  been  put  on,  and  the 
crowd  gotten  interested,  it  is  neces- 
sary for  the  salesman  to  single  out 
his  likely  prospects  and  to  talk  with 
them  later,  away  from  the  crowd,  if 
he  is  to  get  purchase-orders  on  the 
dotted  line.  Otherwise  the  crowd  that 
has  attended  the  demonstration  may 
break  up,  its  curiosity  satisfied,  and 
the  selling  opportunity  will  be  lost. 
But  the  capable  salesman  will  know 
how  to  go  after  the  better  prospects 
in  the  group,  and  follow  up  his  leads 
with  personal  selling  until  the  con- 
tract is  signed. 

Points  tor  salesmen 

These  new  products  have  now 
reached  the  status  of  dependable  mer- 
chandise, which  can  be  sold  by  the 
radio  dealer  with  confidence.  They 
have  already  been  subjected  to  ex- 
haustive home  and  service  tests,  and 
are  equipped  to  stand  up  reliably  in 
operation. 

They  tremendously  increase  the 
convenience  and  pleasure  of  radio 
listening  and  home  entertainment. 
They  augment  the  usefulness  of  the 
home  radio  receiver.  They  offer  new 
arguments  for  the  radio  salesman  to 
use  in  building  radio  sales  into  higher 
price  brackets. 

The  story  of  radio's  new  home  mag- 
ic is  spreading  like  wildfire,  among 
groups  who  have  money  to  spend.  And 
whether  the  particular  new  "miracle 
merchandise"  itself  meets  with  uni- 
versal demand  or  not,  certain  it  is 
that  all  this  hoorah  is  arousing  new 
interest  in  all  radio!  And  all  radio 
sales  will  benefit. 

Types  of  remote  tuning 

With  the  extreme  customer  interest 
in  remote-control  devices,  it  is  essen- 
tial that  the  radio  dealer  be  familiar 
with  the  various  types  of  units  that 
are  offered  and  know  what  each  one 
will  do. 

Basically  there  are  only  two  types 
of  remote  control  now  in  use.     The 


At  left,  dial  your  favorite  program  at 

the  breakfast   table.     Philco   "mystery 

control"    picks    broadcasts    from    the 

next  room. 


Kadette  Tunemaster  will  get  any  B.C. 
station  on  any  radio,  and  control  volume. 


first  is  where  the  remote  control  box 
operates  a  tuning  mechanism  located 
in  the  radio  set.  Either  wire  or  wire- 
less circuits  may  be  used.  Examples 
of  this  type  are  the  Philco  mystery 
control  (wireless) ;  General  Electric 
touch-tuning  remote  control  (wire) ; 
and  the  Stromberg-Carlson  remote 
control  (wire).  In  all  these  types  the 
tuning  is  performed  at  the  radio  set, 
by  an  automatic  tuner,  and  the  re- 
mote control  device  operates  only 
when  it  is  desired  to  change  the  sta- 
tion set-up. 

The  "converter"  is  the  second  type 
of  remote  control.  In  this  type  of  de- 
vice, which  may  be  wired  or  wireless, 
the  antenna  signals  are  fed  to  the 
remote-control  box,  where  they  are 
converted  to  an  intermediate  fre- 
quency, usually  in  the  broadcast  band 
on  an  unused  frequency.  The  radio 
set  then  picks  up  the  signal  from  the 
converter.  This  type  of  remote-con- 
trol device  must  operate  as  long  as 
remote-control  reception  is  desired, 
since  the  radio  signal  must  pass 
through  it. 

Akin  to  the  converter  type  of  re- 
mote control,  is  the  wireless  type  of 
record-player.  This  device  takes  its 
signals  from  the  phonograph  pick-up 
and  broadcasts  them  to  the  radio  set. 
In  this  way,  any  radio  can  be  used 
with  the  phonograph  unit,  merely  by 
tuning  to  the  frequency  of  the  phono- 
graph oscillator. 

"Wireless"  vs.  wire 

Since  the  word  "wireless"  as  now 
used  in  the  trade,  may  have  two 
meanings,  the  radio  dealer  should 
take  pains  to  find  out  precisely  how 
each  device  really  operates.  One  form 
of  wireless  is  "space  radio"  or  induc- 
tion, where  no  wire  link  whatever  is 
used,  since  the  signals  are  transmitted 
through  space. 

Then  there  is  also  what  is  known 
as  the  "carrier"  type  of  wireless,  or 
"guided  radio."  With  this  latter  type 


At  the  right,  Meissner  control  offers, 

from  an  easy  chair,  push  buttons  for 

seven  stations,  with  volume  control. 


Wilcox-Gay's  wireless  model  A57  looks 

like  this  while  playing  record  through 

radio 

of  transmission,  separate  connecting 
wires  are  not  necessary,  since  the  de- 
vice sends  its  signals  over  wire  circuits 
that  are  already  installed.  The  regu- 
lar house  electric-light  wiring  most 
commonly  serves  for  this  purpose. 
Carrier  systems,  thus,  can  be  opera- 
ated  from  any  point  where  it  is  pos- 
sible to  make  a  plug-in  connection  to 
the  electric  light  circuit. 

Einally,  there  is  the  familiar  wired 
type  of  control,  in  which  wires  are 
used  between  the  remote  control  and 
the  radio  set.  In  many  receivers  such 
remote  controls  are  extensions  of  the 
push-button  circuits  already  in  the 
receiver. 

Receiver  controls 

The  Philco  "mystery  control"  is  a 
battery-operated  remote  control  hav- 
ing no  wire  connections  whatever, 
which  sends  out  induction  impulses 
to  control  the  tuning  device  in  the 
radio  set.  In  operation  it  can  be  lik- 
ened to  the  dial  telephone  which  au- 
tomatically selects  the  dialed  number. 
However,  instead  of  having  connect- 
ing wires  like  the  telephone,  the  mys- 
tery control  operates  by  magnetic 
induction.  The  Philco  device  also  can 
effect  changes  in  volume  from  the 
remote-control  box,  as  well  as  turn 
off  the  set. 

In   the    G-E    remote    control,    wire 


Admiral  presents  a  wireless  playback, 
streamlined,   Model  AR-10. 


connections  are  used.  These  recehers 
have  motor-operated  push-button  tun- 
ing, and  the  remote-  control  device  is 
an  extension  of  six  of  the  push-but- 
ton stations.  In  addition  to  selecting 
the  station,  the  G-E  set  will  control 
the  volume  from  the  remote  position. 
A  motor  on  the  volume  control  shaft 
performs  this  task. 

Some  of  the  Stromberg-Carlson  and 
the  less-expensive  Philco  receivers 
have  a  remote  device  which  by  wire 
controls  a  switch  for  selecting  the 
proper  pre-selected  push-button  sta- 
tions. Both  require  a  connecting 
cable  to  the  radio  set. 

The  Motorola  "All-in-one"  remote 
control  tuning  operates  the  motorized 
push-button  tuning  mechanism  in  the 
set  for  station  selection.  Also,  the 
volume  can  be  raised  or  lowered  from 
the  remote  box.  A  connecting  cable 
to  the  receiver  is  used. 

As  optional  equipment  for  its  sets 
having  electric-motor  tuning,  ECA 
has  a  remote-control  box  and  connect- 
ing cable.  In  this  way  the  push-button 
stations  are  operated  remotely. 

Converter  types 

Most  recently  announced  is  the  new 
Kadette  Tunemaster,  which  is  a  re- 
mote control  operating  on  the  con- 
verter principle.  Device  will  operate 
with  any  radio  set  or  special  Kadette 


Sparton  has  just  hit  the  market  with 

this    DeLuxe    model    219-PD    wireless 

phonograph,      complete      with      mike, 

$29.95. 


receivers.  The  radio  signals  from  the 
broadcasting  stations  are  converted 
to  a  single  frequency  and  transmit- 
ted locally  to  the  radio  set  or  sets.  In 
addition  to  having  push  buttons,  the 
Tunemaster  has  a  variable  condenser 
so  that  any  station  can  be  tuned  in. 
Means  for  controlling  volume  is  pro- 
vided. Since  the  device  must  have 
power,  there  is  a  cord  for  connecting 
it  to  the  electric  light  line.  Aside 
from  this  connection  there  are  no 
wires.  The  radio  set  is  tuned  to  the 
frequency  of  the  Tunemaster  for  re- 
mote control  and  left  there. 

A  wired  type  of  converter  is  Meiss- 
ner's  push-button  remote  control.  This 
device  is  connected  to  the  antenna 
and  it  converts  the  incoming  signals 
to   a   single   frequency,   to   which  the 


radio  set  is  tuned.  A  connecting  cable 
to  the  radio  set  is  used  to  transfer 
the  energy  to  the  receiver.  As  with 
the  Tunemaster,  this  device  requires 
a  connection  to  the  electric  power 
line.  Remote  volume  control  is  in- 
corporated in  the  device. 

Time-tuning 

In  addition  to  remote  tuning,  some 
manufacturers  are  offering  automatic 
station  selection.  In  its  simplest  form, 
this  is  a  clock-operated  time-switch 
which  turns  the  radio  on  and  off  at 
pre-set  intervals.  This  type  of  radio 
is  offered  by  Kadette  under  the  name 
of  "Autime." 

A  second  type  of  automatically- 
timed  tuning  is  offered  by  General 
Electric  and  Motorola.  In  these  re- 
ceivers, it  is  possible  to  set  up  in  ad- 
vance the  operation  of  the  radio  for 
a  full  24-hour  period.  Stations  de- 
sired for  each  15-minute  period 
throughout  the  day  and  night  are  au- 
tomatically tuned  in  at  the  appointed 
times.  Any  combination  of  stations 
and  off  periods  may  be  selected.  This 
"time  tuning"  is  similar  to  push- 
button except,  that  a  timing  unit  au- 
tomatically causes  the  push-button 
mechanism  to  function. 

Record  players 

In  order  to  overcome  the  need  for 
awkward  connecting  cables  and  wir- 
ing changes  in  radio  receivers  when 
adapting  them  for  phonograph  op- 
eration,   several    manufacturers    have 


Espey  Mfg.  Co.'s  new  wireless  record- 
player    comes    in    portable-style    case. 

developed  a  wireless  type  of  phono- 
graph attachment  for  use  with  any 
radio  set.  No  wires  to  the  radio  set 
are  required,  thus  simplifying  instal- 
lation. The  signals  from  the  phono- 
graph record  modulate  an  oscillator, 
and  this  oscillator  transmits  the  sig- 
nals to  the  radio  set.  In  other  words, 
the  phonograph  is  a  miniature  broad- 
casting station,  to  which  the  radio  set 
can  be  tuned.  Devices  of  this  type  are 
manufactured  by  Wilcox-Gay,  Spar- 
ton,  Continental,  Sonora  and  Espey. 
Naturally,  a  connection  to  the  elec- 
tric light  line  is  required  to  supply 
power  for  the  record-player  element. 

For  several  years  RCA  has  had  a 
phonograph  oscillator  device  which 
may  be  used  with  any  type  of  phono- 
graph attachment  and  radio  set  with 
no  wiring  changes.  The  modulated  os- 
cillator is  connected  to  the  antenna 
circuit  of  the  set,  and  the  radio  set 
amplifies  the  signals  just  as  it  does 
for  a  broadcasting  station. 

While  only  a  few  manufacturers 
are  named  in  this  article,  there  are 
rumors  that  before  the  season  is  over, 
numerous  other  companies  will  be  of- 
fering remote  control  devices  and  re- 
ord  players  of  various  types.  As  soon 
as  they  are  announced,  Radio  Today 
will  have  the  information  for  its 
readers. 

Complete  technical  description  of 
the  Mystery  Control  appears  on  pages 
30-1  of  this  issue,  presented  exclusively 
as  a  detailed  explanation  of  the  device 
which  marked  the  opening  of  a  new 
trend.  The  circuits  of  this  tuner  are 
revealed  for  readers  in  special  illus- 
trative material. 

MEMPHIS  BC  STUNT 
SELLS  750  RADIOS 

A  radio  distributor  in  Memphis, 
Tenn.,  drummed  up  plenty  of  busi- 
ness for  his  dealers  by  going  on  local 
station  WHBQ  with  a  30-minute  pro- 


At  the  left,  the  lazy  hand  tries  the 
handsome  remote  tuner  by  GE.  It's 
wired;  neat  keys  marked  with  station 

letters. 


gram,  seven  days  weekly.  The  pro- 
gram was  called  "Stumpus  Boys," 
the  talent  consisting  of  two  pianists, 
who  were  also  vocalists,  and  familiar 
with  a  wide  variety  of  tunes,  old  and 
new. 

WHBQ  manager  E.  A.  Alburty  de- 
scribes the  campaign  for  Badio  To- 
day : 

"Listeners  were  invited  to  tele- 
phone their  requests  for  any  pub- 
lished tune  that  they  wanted  played 
and  if  the  tune  requested  could  not 
be  played  in  whole  or  in  part  by  the 
Stumpus  Boys,  then  persons  request- 
ing these  tunes  would  receive  a  prize. 
Four  separate  trunk  lines  were  in- 
stalled and  four  girls  were  employed 
to  answer  these  phones.  In  addition, 
listeners  were  urged  to  enter  the  old- 
est radio  contest  by  submitting  the 
name  of  a  person  owning  an  old  radio. 
Besides  the  daily  prize  given  those 
who  stumped  the  musicians,  a  weekly 
prize  of  two  new  (small)  receiving 
sets  were  given  to  the  person  owning 
the  oldest  radio  registered  during  the 
week,  with  a  duplicate  award  to  the 
person  submitting  the  name  of  the 
winning  contestant. 

Picked  prospects 

"The  telephone  girls  took  down  the 
name  and  address  of  the  person  call- 
ing, the  tune  requested  and  the  age 
of  the  radio. 

"Later  in  the  day,  this  informa- 
tion was  transcribed  into  a  card  file, 
duplications  were  weeded  out  and  to 
every  separate  person  entered,  a  mer- 
chandise check  was  mailed  which  was 
acceptable  on  the  purchase  of  one  of 
the  new  radios  as  advertised.  Mer- 
chandise checks  were  redeemable  at 
any  retail  dealer  handling  this  make 
of  radio  and  provided  a  discount  of 
20  per  cent  on  a  $200  radio  and  was 
scaled  down  on  the  lower  priced 
models  to  average  10  per  cent  on  the 
purchase  price. 


Set  it  once  and  forget  it — the  "time-tuning"  development  by  Motorola  automatically 
offers  any   one   of   6   stations   during  the   entire   day.      On   and   off   service,   too. 


One   of   the   first   phonographs   of   the 

wireless     type — a     smart     player     by 

Sonora. 


"The  result  of  the  campaign  showed 
that  the  distributor  moved  his  entire 
stock  of  radios  and  had  to  reorder 
from  the  factory,  selling  a  total  of 
750  units  within  the  30  days  that  the 
campaign  ran.  The  actual  sales 
reached  a  higher  figure  than  this,  for 
the  retailer  often  made  delivery  from 
his  floor  stock  and  did  not  reorder 
from  the  distributor." 

ASKS  DAYTIME  MUSICAL 
PROGRAMS 

"I  read  Radio  Today  with  great  in- 
terest," writes  C.  F.  Bolf,  Schenec- 
tady, N.  Y.,  dealer,  "and  commend 
the  article  in  your  September  issue 
on  page  10,  under  the  heading  of 
'Better  Daytime  Demonstration  Pro- 
grams Needed.' 

"Present  daytime  programs  are  a 
sore  disappointment  to  the  radio 
dealers'  salesmen  and  the  radio  in- 
dustry as  far  as  ;  sales  performance 
comparison  goes.  All  day  long,  prac- 
tically all  the  larger  stations  broad- 


cast mostly  about  'two  teaspoonfuls 
sugar,  and  two  cups  of  flour,'  and  so  . 
on,  or  otherwise  we  have  to  listen  to 
some  soap  program  of  a  similar  na- 
ture. Such  programs  make  you. and 
me  turn  our  radios  off.  We  would 
much  rather  listen  to  traffic  horns. 

"Badio  Today  could  do  the  radio 
industry  a  great  favor,  by  putting  on 
some  real  worthwhile  music  that 
would  appeal  to  the  customers,  and 
this  would  be  greatly  appreciated. 
When  a  customer  comes  in  to  com- 
pare the  new  model  radios  with  his 
old  one,  he  wants  to  compare  the 
tone.  We  would  like  to  show  him  the 
great  improvement  in  the  tone.  How- 
ever, we  can  very  rarely  do  this  with- 
out good  'music.  With  present  day- 
time programs,  there  is  very  little 
that  we  can  do  to  compare  the  tone 
and  the  full  roundness  of  today's  mod- 
ern radio  unless  we  attach  a  phono- 
graph and  play  records  on  the  set. 
But  with  good  musical  programs  on 
the  radio  during  shopping  hours,  the 
sales  resistance  would  be  cut." 


October,  1938 


15 


RCA-Victor's  40th  Anniversary  Model  Victrola  U125  adds  sales  features  to  the 
phonograph-radio  field,  backed  by  unusual  series  of  big  promotions. 

MOVING  PHONO-RADIOS 

Field  tips  on  the  combination  business 


At  Trinity  Talking  Machine  Co., 
New  York,  you  can  hear  the  story 
about  the  man  who  came  in  the  store 
to  buy  a  $1  record,  and  went  out  with 
a  $1,000  Capehart.  It  may  have  been 
because  he  asked  to  hear  the  record, 
and  the  salesman  was  alert  enough  to 
play  it  on  a  high-priced  instrument, 
rather    than    a    small    record    player. 

The  policy  here  is  to  let  record 
buyers  hear  the  discs  on  a  combina- 
tion— a  model  that  they  might  buy,  if 
they  look  like  the  type  to  be  buying 
anything. 

Multiple  appeal 

In  straight  demonstrations  at  Trin- 
ity, according  to  what  Paul  Sonnen- 
thal  says  about  them,  the  procedure 
is  to  play  a  record  first,  before  demon- 
strating the  radio.  He  says  that  if 
you'll  select  a  favorite  recording,  the 
fidelity  reproduction  will  likely  put 
the  prospect  in  a  good  frame  of  mind. 


If  he's  used  to  radio  static,  the  per- 
formance will  suit  him,  right  off. 

Mr.  Sonnenthal  likes  the  combina- 
tion business,  thoroughly,  because  he 
declares  that  the  record-buying  traffic 
is  a  big  asset  to  any  store. 

Further  success 

"We're  suggesting  combinations  to 
all  radio  customers  these  days,"  re- 
ports Alfred  C.  Tuffery  of  Wurlitzer's. 
Records  are  played  right  and  left  for 
those  who  come  in  only  for  radios. 

Drawn  to  a  combination,  prospects 
are  asked  what  they'd  like  to  hear. 
Usually  they  say,  "Oh,  play  any  old 
thing."  This  gives  the  salesman  a 
chance  to  put  on  a  record  that  is  good, 
but  catchy.  The  instrument  is  hand- 
some ;  the  tone  perfect,  the  mood  more 
quiet  than  the  tempo  of  the  radio 
demonstration.  Mr.  Tuffery  tells  them 
that  there's  nothing  like  it — "music 
you  want,  when  you  want  it"  after  a 


hard  day's  work.  He  has  a  tendency 
to  sell  relaxation,  via  good  music, 
with  his  radio  merchandise. 

Not  only  that,  this  expert  points  out 
tc  his  customers,  there  are  many  other 
advantages  to  having  a  record  player 
in  the  home.  They  fit  in  with  home 
movies,  they  have  become  a  part  of 
guest  entertainment  practice,  and 
they  give  the  owner  a  chance  to  play 
around  with  novelty  recordings  made 
by  friends. 

Another  stunt  used  at  the  store  is 
the  weekly  appearance  of  popular  or- 
chestra leaders,  who  come  to  the  store 
in  person  and  autograph  records  for 
the  fans.  These  affairs  get  the  benefit 
of  build-ups  in  ads  and  in  windows. 


Musical  headquarters 

Assorted  dealers  declare  that.' any 
store  which  goes  heavy  on  combina- 
tions should  make  a  point  of  keeping 
an  appropriate  series  of  musical 
books.  To  serve  as  reference  lists  for 
customers  and  salesmen  alike,  the  vol- 
umes will  include  opera  books,  record 
catalogs,  material  on  famous  com- 
posers, books  on  the  symphony,  collec- 
tions of  musical  reviews,  etc. 

These  publications  make  impressive 
displays,  and  often  represent  a 
further  source  of  income  for  the  deal- 
er. Also,  they  carry  a  wealth  of  ideas 
for  direct  mail  promotion,  and  for  dis- 
play advertising. 


WAX  WORTH  WATCHING 


BUNNY  BERIGAN  and  his  orchestra  playing  Why 
Doesn't  Somebody  Tell  Me  These  Things  and  When 
a  Prince  of  a  Fella  Meets  a  Cinderella,  both  with  VR 
by  Jayne  Dover — Victor  26055. 

KAY  KYSER  and  his  orchestra  playing  For  No 
Rhyme  or  Reason  with  VC  by  Ginny  Simms  and  Harry 
Babbitt,  and  At  Long  Last  Love,  with  VC  by  Ginny 
Simms — Brunswick   8209. 

LARRY  CLINTON  and  his  orchestra  playing  Summer 
Souvenirs,  with  VR  by  Bea  Wain,  and  Zroj  Zag — Victor 
26042. 

COUNT  BASIE  and  his  orchestra  playing  Stop  Beat- 
in'  'Round  the  Mulberry  Bush  and  London  Bridge  Is 
Falling  Down,  both  with  VC  by  James  Rushing — 
Decca  2004. 

BING  CROSBY,  with  John  Scott  Trotter  and  his 
orchestra,  singing  Mexicali  Rose  and  Silver  on  the 
Sage — Decca  2001. 

ROY  SMECK  and  his  Serenaders  playing  Tu-Li  Tulip 
Time  and  I    Used  to  Be  Color  Blind — Decca  2015. 

EDDY  DUCHIN  and  his  orchestra  playing  My 
Heart  Is  Unemployed  and  How  Long  Can  Love  Keep 
Laughing,  both  with  VC  by  Stanley  Worth — Bruns- 
wick 8219. 

JIMMY  D0RSEY  and  his  orchestra  playing  The 
Yam,  with  VC  by  The  Dorsey  Trio,  and  Change  Part- 
ners, with  VC  by  Bob  Eberle — Decca  2002. 

HAL  KEMP  and  his  orchestra  playing  F.  D.  R. 
Jones,  with  VR  by  Hal  Kemp  and  his  Swing-a-Roost- 
ers,  and  My  Heart  Is  Unemployed,  with  VR  by  Bob 
Allen— Victor   26038. 

GRAY  GORDON  and  his  Tick  Tock  Rhythm  orches- 
tra playing  Heigh-Ho  the  Merry  0  and  For  the  First 
Time,  with  VR  by  Cliff  Grass— Bluebird  B77S4. 

ART  SHAW  and  his  orchestra  playing  Begin  the 
Beguine  and  Indian  Love  Call,  with  VR  by  Tony 
Pastor  and  chorus — Bluebird  B7746. 


16 


Radio  Today 


XMAS  XTRA! 


Girt  items  to  sell 

Directly  at  left,  the  electric  blanket 
by  GE  with  automatic  adjustable 
control,  convenient  to  movie  star 
Marie   Wilson   of  Warner  Bros. 

At  left  center,  the  new  Iris  candid 
camera  by  Univex,  brightly  pack- 
aged for  Xmas,  $9.85. 

Lower  left,  a  deluxe  Remington 
Rand  noiseless  portable;  new,  and 
likely-selling  at  $69.50. 

Lower  right,  a  sure-fire  appeal  to 
youngsters,  with  Elkay's  new  Junior 
Executive  Communicator.  Two- 
station  package  is  $6.50  net. 

Directly  below,  a  holiday  merchan- 
dising nifty  for  the  Steem-Electric 
iron;   list,   $12.95. 


October,  1938 


17 


PROFITS  AMONG  FARMERS 

Dealers  30  into  action  on  new  products 


A  batch  of  new  developments  in  the 
farm  radio  field  has  awakened  many 
dealers  to  the  fact  that  there  are  fat 
profits  still  to  be  made  in  the  promo- 
tion of  farm  sets,  batteries,  motors 
and  wind  chargers. 

All  major  radio  manufacturers  are 
ready  with  receivers  which  use  the 
new  low-drain  tube  and  offer  dramatic 
sales  features  in  the  way  of  econom- 
ical operation.  The  facts  are  that  bat- 
teries for  the  set  costing  $7  and  last- 
ing' about  a  month  in  1937,  can  now 
be  bought  for  $4  and  will  last  over  6 
months.  This  is  what  the  new  1.4 
tube  has  given  the  farm  dealer  as  a 
sales  asset,  this  season.  And  the  bat- 
tery manufacturers  have  been  quick  to 
feature  appropriate  batteries. 

32-volt  activity 

Meanwhile,  the  makers  of  wind- 
electric  equipment  are  having  a  good 
time  with  the  32-volt  proposition.  Due 
to  the  fact  that  farmers  may  run  ap- 
pliances and  lights  with  this  appara- 
tus, the  merchandise  can  be  adver- 
tised, promoted  and  demonstrated 
with  an  extraordinarily  dramatic  ef- 
fect. The  appeal  is  wider  and  stronger 
than  when  only  a  radio  was  to  ac- 
company   the    generating    equipment. 

Many  dealers  are  interested  here  be- 
cause this  kind  of  merchandise  means 
higher-priced  units  and  more  profit. 
Also,  sales  of  additional  appliances 
are  involved. 


Motor  market 

Styles  and  prices  of  motor  chargers 
have  been  smartly  gauged  for  1938-39 
selling.  These  days,  the  motors  come 
equipped  with  electric  starting, 
power-take-offs  for  extra  convenience, 
and  portable  features  which  are  im- 
portant to  the  farmer. 

Further,  one  manufacturer  points 
out  that  dealers  will  find  additional 
prospects  among  cottages,  cabins, 
camp  trailers,  boats,  yachts,  cruisers, 
tenders,  contractors,  oil  fields,  users  of 
flood  lights,  trucks,  buses,  freight 
trailers,  filling  stations,  stores,  ga- 
rages, etc. 

E/ecfric  fences 

The  matter  of  electric  fences,  as  a 
product  which  most  farmers  do  not 
have  but  could  profitably  use,  has 
settled  safely  into  the  hands  of  more 
skilful   designers.    Demonstrations  of 


the  new  devices  in  this  field  will  prove 
to  prospects  that  the  element  of 
danger  has  been  removed. 

One  New  Jersey  manufacturer 
points  out  that  there  are  not  more 
than  175,000  electric  fences  in  use, 
leaving  a  wide-open  market  among 
the  6,800,000  total  farms  in  the  coun- 
try. 

For  all  these  products,  the  prospects 
are  generally  better  in  terms  of  all- 
over  agricultural  conditions.  Events 
in  Europe  have  had  a  favorable  effect 
on  wheat  prices.  And  the  folk  on 
thousands  of  farms  are  just  now  mak- 
ing final  plans  for  the  season  of 
winter-night  listening. 

WATCH  YOUR  MEN 

Manager  Berutio  of  the  Ace  Radio 
Co.,  St.  Louis,  Mo.,  says  that  the  im- 
portant thing  in  house-to-house  work 
is  the  selection  of  the  men  to  do  it. 
Where  a  terrific  sales  campaign  is 
launched  as  such,  the  accent  may  be 
unhappily  based  upon  sheer  volume, 
rather  than  on  the  long-time  welfare 
of  the  store. 


POWER  FROM  (COLD)  WIND 


Wide-eyed  Eskimos  watch  a  recent  in- 
stallation    by     Wincharger     Corp.     at 
Cape  Dorset  in  Baffin  Island. 


Salesmen  must  be  taught  to  depend 
on  the  store  as  a  guidance  center,  and 
not  just  a  place  to  report  briefly  on 
highly  individual  activity.  This  guid- 
ance should  consist  of  an  exchange  of 
notes  with  other  salesmen,  a  thorough 
understanding  of  store  policy  as  it 
applies  to  daily  selling  problems,  an 
appropriate  plan  as  to  what  claims  can 
be  made  for  the  merchandise,  and  a 
definite  outline  of  what  this  particu- 
lar store  expects  of  its  representatives 
in  matters  of  rewards  and  promo- 
tions. 

Otherwise,  evils  crop  up.  Salesmen 
may  accept  fees  from  several  different 
stores;  they  may  develop  high-pres- 
sure methods  which  turn  out  to  be 
unhealthy  for  the  shop,  or  they  may 
find  it  convenient  to  count  only  on  a 
quick  clean-up. 

The  dealer  has  to  handle  the  sales 
personality  so  that  it  will  be  gently 
supervised,   but  not   cramped. 


SELL  THEM  IN  THE  STORE 

The  more  times  you  can  get  pros- 
pects to  consent  to  store  demonstra- 
tions instead  of  home  demonstrations, 
the  more  sure  sales  you  will  make, 
says  Charles  Deason,  owner  of  D'ea- 
son's  Eadio  Service,  104  Navarro  St., 
San  Antonio,  Texas. 

Deason,  who  won  second  place  in  a 
national  sales  contest  recently  (Fhilco- 
Deason,  out  of  207  dealers  in  his 
area,  was  second  with  64010  points) 
does  all  his  own  selling,  and  rings 
up  a  fine  yearly  sales  total. 

"I  tell  prospects  that  the  radio  they 
are  hearing  plays  as  well  at  the  shop 
as  in  their  home,''  says  Deason,  "and 
that  if  they  want  it,  to  take  it  home, 
on  a  $10  down  payment.  Then  if 
they  want  their  money  back  within  a 
few  days,  I'll  give  it  to  them.  They 
don't  even  have  to  buy  another  set. 
2\o  question  asked.  Deals  made  in 
this  manner  stick.  When  one  of  our 
sets  goes  into  a  home  we  see  that 
everyone  knows  how  the  set  operates, 
and  we  tell  everyone  just  what  the 
set  will  do. 

"The  man  who  is  willing  to  part 
with  a  $10  bill  to  take  a  radio  into 
his  home,  usually  will  keep  the  radio, 
and  he'll  test  the  set  out  thoroughly 
in  our  shop  before  he  decides  to  lay 
out  his  ten-spot  and  take  the  set  home, 
in  this  way,  we  sell  him  better." 

To  make  extra  sales,  Deason  con- 
tacts all  regular  customers  and  learns 
from  them  the  names  of  friends  who 
may  want  sets.  He  also  visits  all 
business  friends,  spends  lots  of  time 
with  them,  and  gets  tips  here  on  who 
to  see  to  make  sales  on  new  sets. 


18 


Radio  Today 


MR.  DEALER 


^/Xs/- 


YOU  CANGETTHE  SAME  MAXIMUM 
DISCOUNT  AND  EXCLUSIVE  SALES  FOR  YOUR  CITY  ENJOYED  BY  AMERICA'S 
BIGGEST  DEALERS— ON  THE  WORLD'S  FINEST  CUSTOM-BUILT  RADIO. 


MTHwiAGtrt 


The  MASTERPIECE  VI,  in  Clifton  bass-reflex  console 
pictured  above,  is  one  of  16  equally  distinguished  models. 
Optional  in  each  are  two  chasses,  the  MASTERPIECE  VI 
just  awarded  the  GRAND  PRIX  at  the  Paris  International 
Exposition  in  competition  with  the  finest  American  and 
European  radios,  and  the  "15-17"  which,  used  by  the 
winner  of  an  International  Short-Wave  Distance  Contest, 
was  declared  "World's  Champion." 

Both  chasses  are  triumphs  of  sound  engineering  rigorously 
avoiding  short-lived  "gadget-appeal."  Every  penny  of  cost 
goes  into  building  the  finest  toned,  most  sensitive,  most  selec- 
tive,  and   most   beautiful   radios   the   world   has   ever   seen. 


McMURDO  SILVER 

CORPORATION 


President    and    Chief 

Engineer 

McMurdo     Silver     Corp. 


A  PROVED  AND  PROFITABLE  PLAN 


I  offer  you  the  exact 
selling  plan  and  merchandise  which  are  making  money  for 
the  largest  dealers  in  the  country  today.  During  the  past  year 
fhey  have  eliminated  most  of  the  well-known  "headaches"  of 
selling  for  these  selected  dealers.  Coming  through  the  acid  test 
of  the  biggest,  toughest  markets  with  flying  colors  -  McMurdo 
Silver  radios  "clicked"   100% — as  they  will  click  for  you. 


MAXIMUM    JOBBER    DISCOUNT 


Whether  you  order  one 
sample  or  twenty,  you  get  the  absolute  full  discount.  Dealing 
direct  with  the  manufacturer  gives  you  every  penny  of  the 
largest  profit  margin  in  radio  today — on  every  sale. 


ONLY  ONE  DEALER  TO  EACH  CITY 


_  Here  is  the  sweetest 
part  of  the  plan  ...  no  more  throat-cutting  competition  .  .  . 
no  more  racketeering  trade-in  allowances,  that  steal  your 
sales  .  .  .  For  in  your  city  and  its  suburbs,  you  are  the  only 
one  who  can  sell  McMurdo  Silver  radios. 


MiaBMBilDHMiMlfBa  I  ndei  this  proved 
guarantees  full  profit  on  every  sale,  you  get  the  world's  finest 
radios  and  combinations — each  has  the  eye  appeal  of  polished 
chromium,  battleship  construction,  and  is  enclosed  in  distinctive 
cabinetry  .  .  .  placing  it  in  a  class  no  other  maker  touches. 
This  is  quality  that  makes  your  prospect  forget  price  chiseling 
in  the  amazement  of  performance  he  did  not  believe  could  be 
built  today. 


LOCAL  AND  NATIONAL  ADVERTISING 


We  are  now  in 
the  midst  of  a  national  advertising  campaign  that  is  pulling 
prospects  from  your  very  city.  Every  one  will  be  turned  over 
to  you  for  sale.  The  biggest  dealers  in  America  are  running 
McMurdo  Silver  ads  in  state-wide  papers  that  create  sales  in 
your  trading  zone.  We  supply  you  with  mats  and  money  to 
run  these  identical  ads,  which  enable  you  to  dominate  radio 
advertising  in  your  city.  Add  to  this,  beautiful  circulars  for 
direct  mail  and  give-aways,  prospect-pulling  store  displays  and 
direct  mail  letters  tested  and  proved  by  the  biggest  dealers,  and 
you  are  definitely  equipped  to  do  a  real  profit  selling  job. 


NO  MINIMUM  REQUIREMENTS 


.  ,   __  ,    There  isn't  a  single  "but" 

in  this  plan — not  a  single  restriction  or  demand.  You  prove  the 
profits  it  will  make  for  you  by  ordering  one  or  as  many  samples 
as  you  select,  and  see  how  fast  they  sell.  You  don't  even  have 
to  buy  until  you  have  sold  them,  if  you  don't  want  to! 


MADE  TO  ORDER    FOR   YOU 


_  No  dealer  is  too  small — or 
too  large — to  get  in  on  these  profits.  This  tested  and  proved 
plan  is  the  result  of  my  27  years  of  active  work  in  radio.  The 
past  year  of  trial  has  proved  it  to  be  radio's  greatest  profit- 
guarantee  plan.  Now  I  am  offering  all  this  to  you — every 
chassis  carrying  your  name  plate  or  your  customer's  name,  as 
you  prefer — and  to  you  only  for  your  city.  You  will  immediately 
recognize  it  as  the  "horse  sense"  radio  selling  has  long  needed. 
I  know  you  will  act  quickly  to  get  it  exclusively. 


CLIP  THIS  COUPON  toYOUR  LETTERHEAD  and  MAIL-NOW! 


cMURDO   SILVER   CORPORATION 

2902   South    Michigan   Avenue 

Chicago,   Illinois 

Rush  me  full   details  of  your    "horse  sense"    plan  to   make   money   for   me. 

My  letterhead  is   attached.     My  normal   territory  which   I   want   exclusively 


October,  1938 


19 


SMALL  RADIO-ITS  RECORD  AND 
PROMISE  FOR  THE  FDTDRE 

Anticipating  a  twelve-to-fifteen  million  sets  per  year  business 


By  Ben  Abbahs, 

President,  Emerson  Radio  and 

Phonograph  Corporation. 

No  one  in  the  radio  business,  so  far 
as  I  can  recall,  "ever  made  a  dime"  by 
going  against  the  trends,  the  forces 
and  facts  of  progress.  Before  enlarg- 
ing upon  this,  as  it  applies  to  small 
radio,  I  want  to  state  that  I  regard  it 
as  a  tribute  to  the  intelligence  of  the 
radio  merchants  of  America  that,  as  a 
group,  they  have  been  able  to  dis- 
tinguish between  sound  business  prac- 
tices and  the  defeatism  of  selfish 
arguments  in  behalf  of  any  one  par- 
ticular type  of  product,  gadget  or  price 
range.  They  have  learned  in  the  hard 
school  of  experience  that  their  success, 
the  net  profit  of  their  operations,  has 
been  and  always  will  be  determined 
by  their  own  ability  to  recognize  pub- 
lic wants  and  buying  capacities,  by 
their  sales  of  units  in  all  price  brack- 
ets and,  finally,  by  the  practical  man- 
agement of  their  affairs. 

When  any  given  type  of  product — 
in  any  general  industry — accounts  for 
from  60  to  70  per  cent  of  the  total 
number  of  units  sold,  it  usually  means 
that  the  buying  public  has  asserted  its 
preferences.  This  has  been  the  un- 
precedented achievement  of  small 
radio. 

Seven  out  of  fen 

From  six  to  seven  out  of  every  ten 
home  sets  now  being  sold  are  small 
radios.  I  like  to  believe  that  Emer- 
son's designing,  styling,  production 
and   promotion   have    had   some   influ- 


ence on  this  trend,  but  at  the  same 
time  I  recognize  the  fact  that  some- 
thing more  fundamental  than  manu- 
facturing and  promotional  effort  is 
responsible  for  the  ever-increasing 
public  demand  for  small  sets  and  for 
the  success  of  those  dealers  who  see 
the  handwriting  on  the  wall  and  are 
conducting  their  operations  accord- 
ingly. 

That  small  radio  should  have  as- 
sumed its  huge  relative  proportions  in 
the  industry — that  its  development 
should  have  become  an  epic  in  the 
history  of  American  business — that  it 
served  as  a  bulwark  and  protected  and 
furthered  the  fortunes  of  the  trade  and 
rose  to  greater  relative  heights  every 
single  year  during  the  worst  depres- 
sion ever  experienced  in  this  country 
— was  a  natural  and  inevitable  conse- 
quence of  its  desirability,  easy  avail- 
ability and  manifold  services  to 
millions   of  people. 

Big  years 

The  radio  dealers  who  have  recog- 
nized the  possibilities  of  small-set 
merchandising  and  who  are  featuring 
small  radio  as  the  chief  motivating 
force  in  their  sales  promotion,  do  not 
need  to  be  told  about  its  almost  end- 
less uses  in  the  retail  scheme.  But  to 
engender  a  proper  appreciation  of 
small  radio  in  the  minds  of  those  who 
have  yet  to  realize  its  potentialities, 
let  us  discuss,  for  a  moment,  a  few 
of  the  contributions  it  has  made.  Then 
we  can  get  down  to  the  case  of  its 
practical    building   aspects. 

In  the  year  of  1929,  when  prosperity 


Note  that  as  retail  selling  prices  of  radio  sets  have  come  down,  the  saturation  of 

radios  in  American  homes  has  risen  at  an  even  faster  rate!    Without  small  sets, 

it  is  doubtful  such  wide  use  of  radio  could  ever  have  occurred. 


was  at  its  peak,  when  radio  was  still 
regarded  as  a  novel  sensation — and 
most  everybody  had  ample  money  to 
buy — the  production  of  home  sets 
reached  an  all-time  high  of  approxi- 
mately four  million  units.  From  1929 
on,  while  most  other  business  was  in 
a  virtual  state  of  collapse,  the  produc- 
tion of  radio  receivers  increased  in 
number  until  it  reached  the  staggering 
total  of  approximately  eight  million 
sets  in  1936  and  again  about  eight 
million  sets  in  1937.  "What  was  re- 
sponsible for  that  phenomenal  growth 
against  such  overwhelming  odds?  Let 
there  be  no  mistake  about  it — the  chief 
factor  was  the  advent,  the  develop- 
ment and  the  public  demand  for  a  type 
of  set  that  gave  hundreds  of  thousands 
of  families  full  radio  satisfaction  at  a 
price  they  could  afford  to  pay  in  their 
reduced  circumstances.  Had  the  small 
set  not  been  developed  there  can  be 
no  question  that  radio  production,  as 
it  was  geared  at  the  time,  would  have 
been  curtailed  in  some  proportion  to 
production  in  all  other  fields. 

Not  only  did  small  radio  play  a 
major  part  in  saving  the  industry,  it 
is  a  matter  of  no  mean  record  that 
because  vast  numbers  of  people  bought 
small  radios  at  a  lower  price,  many 
thousands  of  people  were  kept  at  work 
who  otherwise  would  have  been  forced 
into  the  ranks  of  the  unemployed. 
Suppliers,  radio  workers,  salesmen, 
dealers,  service  men  were  kept  on  the 
job.  With  millions  of  additional  sets 
in  homes,  the  broadcasting  stations 
were  able  to  reach  greater  audiences 
for  their  sponsors.  That  advertising 
had  its  effect  and  thus  still  more 
people  were  helped — and  the  march  of 
progress    continues. 

All  during  this  period,  when  the 
volume  of  Emerson's  sales  was  con- 
sistently reflected  in  the  industry's  ad- 
vance, my  friends  kept  telling  me  that 
our  growth  was  merely  a  product  of 
the  depression — that  as  soon  as  good 
times  returned  there  would  be  a  re- 
versal of  buying,  and  the  small  set 
would  give  way  to  the  console.  From 
the  standpoint  of  increased  buying 
power  they  may  have  been  right,  but 
they  overlooked  several  important  con- 
siderations which  have  always  been 
the  guiding  lights  and  inspiration  of 
the  organization  now  producing  the 
"World's  Biggest  Selling  Little  Radio." 

Three  to  six  sets  per  home/ 

We  at  Emerson,  our  distributors  and 
dealers  know  today  that  small  radio, 
when  it  is  properly  designed  and  con- 
structively promoted,  is  one  of  the 
most  vital  forces  working  towards  a 
continuing  prosperity  in  the  business 
and  to  greater  earnings  in  the  future. 
We  envision  an  average  of  from  three 
to  six  sets  in  American  homes.  We  see 
(Continued  on  page  22) 


20 


Radio  Today 


1 


.  .  .  THEY'VE  GOT  TO  BE! 


HERE  you  see  just  a  corner  of  a 
typical  Sylvania  testing  laboratory. 
In  this  room,  highly  skilled  experts  check 
Sylvania  tubes  for  quality — record  life 
tests — check    engineering    standards. 

And  Sylvania  quality  is  not  based 
on  "averages."  Each  individual  tube 
must  prove  itself  perfect — or  be  com- 
pletely  destroyed   by   the   "crusher." 


When  you  sell  radio  tubes,  you  can't 
afford  to  take  chances  with  quality — 
it  means  too  much  to  your  business! 
Sell  Sylvanias  and  you  can  be  sure 
of  satisfied  customers,  repeat  sales.  For 
Sylvania  quality  is  always  A-l — protect- 
ed by  precision  manufacture  .  .  .  proved 
by  scores  of  tests. 


SET-TESTED    RADIO   TUBES 

Hygrade  Sylvania  Corp.,  Emporium,  Pa.  Also  makers  of  Hygrade  Lamp  Bulbs 


October,  1938 


21 


SMALL  RADIOS — THEIR  FUTURE 


(Continued  from  page  20) 
them  in  offices,  in  schools,  in  hotels, 
in  hospitals.  We  anticipate  a  total  in- 
dustry's production  and  sale  of  from 
twelve  to  fifteen  million  sets  a  year. 
We  are  realistic  enough  to  believe 
that,  regardless  of  financial  status, 
when  one  console  is  purchased  by  a 
family  that  is  usually  the  end  of  con- 
soles in  that  home  until  it  becomes  ob- 
solete— and  it  marks  the  beginning  of 
additional  small  set  purchases.  More- 
over, we  see  from  actual  surveys  and 
dealer  experience  everywhere,  countless 
people  buying  small  sets  as  their  first 
radios. 

Here  is  one  for  the  book.  It  has  been 
proved  beyond  question  that  the  radio 
dealers  who  do  the  biggest  small-set 
business  are  almost  invariably  the 
dealers  who  do  the  biggest  console  and 
combination  business.  Do  not  believe 
for  a  moment  that  those  dealers  fea- 
ture the  small  sets  as  "come-ons."  With 
them,  small  radio  stands  on  its  own — 
and  acts  as  an  advertising  and  traf- 
fic stimulus  for  their  store  in  the  bar- 
gain. A  case  in  point,  out  of  many 
similar  instances,  was  the  experience 
of  one  of  Emerson's  Philadelphia 
dealers.  Early  this  year,  when  we  in- 
troduced our  first  $9.95  model,  the 
dealer  mentioned  ran  a  full-page  ad 
on  this  and  a  $29.95  Emerson  set. 
More  than  two  thousand  sales  were 
made  as  a  result  of  that  one  insertion 
— and  approximately  one  thousand  of 
those  sales  were  sets  ranging  from 
$19.95  to  $100.00! 


Reach  all  the  market 

As  a  matter  of  information  the  local 
and  national  newspaper  and  magazine 
advertising  of  the  $9.95  and  $14.95 
Emerson  products  almost  invariably 
includes  other  table  models  listing  at 
higher  prices.  Regardless  of  opinions 
and  statements  to  the  contrary,  it  has 
been  proved  over  and  over  again  that 
the  actual  units-and-dollar  volume 
which  results  from  this  advertising  is 
on  the  side  of  the  higher  priced  sets. 
The  point  which  should  always  be 
borne  in  mind  is  that  in  this  country 
of  thirty  million  homes,  most  families 
have  definite  buying  limitations  and 
it  should  be  the  purpose  of  radio  mer- 
chandising to  reach  ALL  of  the  mar- 
ket. Small  radio's  place  in  this  all- 
embracing  aim  is  perfectly  obvious. 

I  have  always  found  it  a  refreshing 
experience  to  stop  at  the  windows  of 
radio  stores  to  observe  the  interest  of 
the  man  in  the  street.  I  believe  every- 
one who  has  done  this  will  agree  that 
the  showing  of  a  variety  of  small  sets 
in  the  range  of  styles  which  this  type 
of  set  permits,  invariably  stops  more 
people  and  excites  far  more  comment 
than  does  any  other  merchandise.  It 
attracts  and  interests  more  people, 
draws  more  people  into  stores,  makes 
for  a  much  more  active  form  of  mer- 
chandising and  retail  selling  and,  in 
itself,  constitutes  one  of  the  best  forms 
of  store  advertising.  These  are  but  a 
few  of  the  reasons  why  radio  dealers 
should  give  small  radio  more  of  a  play 
in  their  windows  and  stores.    A  com- 


parison of  newspaper  advertising  and 
its  results — and  actual  respone  experi- 
ence— also  proves  these  points.  Every 
successful  merchant  we  interview  tells 
us  most  emphatically  that  in  the  ab- 
sence of  small  radio  he  could  not  sus- 
tain his  space  costs. 

Cost  of  retail  selling 

Suppose  we  look  at  small  radio  from 
another  angle — the  cost  of  doing  busi- 
ness. One  investigation  after  another 
proves  the  average  cost  of  installment 
selling  to  be  38  per  cent.  Cash  sales 
involve  an  average  overhead  of  20 
per  cent.  How  many  consoles  are  sold 
for  cash?  More  than  half  of  small 
radios  are  sold  for  cash.  Think  of  the 
sales  work,  the  delivery  costs,  the  in- 
stallation of  consoles  and  compare 
them  with  the  over-the-counter  method 
in  small  set  merchandising. 

Of  course  consoles  will  continue  to 
be  in  demand  and  money  will  continue 
to  be  made  on  their  sales.  There  are 
Emerson  consoles  and  they  range  in 
price  from  $69.95  to  $219.95.  They 
constitute  a  profitable  part  of  our 
business  and  the  business  of  our  dis- 
tributors and  dealers.  But  Emerson 
is  following  the  trend.  We  have 
adapted  our  business  to  the  need  of 
the  dealer  for  a  greater  variety  of 
styles  with  a  lower  stock  investment, 
for  more  rapid  cash  turnover,  for  in- 
ventory that  is  always  worth  one 
hundred  cents  on  the  dollar,  for  a 
twelve-months-per-year  radio  season, 
for  "news"  features  which  keep  public 
interest  alive,  for  merchandising  pol- 
icies which   insure  his  protection,  for 


.     ■  <a     .J  *^€  .     IP     ..;:,] 

Ben  Abrams,  Emerson's  president,  who 
foresees  the  future  with  "three  to  six 
radios  per  home,"  and  receiver  produc- 
tion  reaching    15    million    sets   yearly. 


styling  and  performance  and  values 
which  keep  his  advertising  constantly 
alluring  and  his  sales  force  forever 
enthusiastic. 

The  ultimate  and  inevitable  ques- 
tions in  the  dealer's  mind  are,  "Can 
I  make  a  profit  on  small  radio?  Will 
it  pay  me  to  advertise  small  sets? 
Would  I  not  be  better  off  if  I  featured 
gadgets — concentrated  on  higher  priced 
units?"  I  believe  I  have  answered 
these  questions  generally  in  the  fore- 
going statements.  But  let  us  put  it  this 
way:  Roughly  speaking,  if  your  over- 
head on  a  $100  console  is  38  per  cent 
and  20  per  cent  on  a  $25.00  small  set 
(which  is  the  average)  and  you  sell 
three  small  sets  to  one  console  (as 
most  dealers  average),  you  may  have 
a  net  profit  of  $8  on  the  console  and 
a  net  profit  of  $15  on  the  three  table 
models.  I  am  speaking  of  actual  net 
now — not  the  delusion  of  gross  profits 
— and  that  is  what  your  bookkeeping 
will  show  at  the  end  of  your  fiscal 
year!  My  only  suggestion  here  is  that 
dealers  in  doubt  figure  the  cold  facts 
out  for  themselves  and  take  all  of  the 
attending  merchandising  factors  into 
account. 


Service  man's  gain 

One  of  the  issues  which  the  increas- 
ing demand  for  small  sets  has  raised 
is  its  possible  effect  on  the  activities 
and  earnings  of  service  men.  Because 
of  the  lower  price  of  the  small  sets, 
will  it  be  possible  for  the  service  man 
to  make  sufficient  charges  for  repairs 
and  replacements  to  sustain  his  busi- 
ness? I  do  not  believe  that  any  serv- 
ice man  need  be  concerned  about  this, 
for  the  reason  that  while  continuing 
his  work  on  consoles  he  will  be  get- 
ting the  additional  calls  which  will 
come  from  the  buyer  of  the  small  set — 
the  two-three-and-more-sets-to-a-home 
families  in  his  community.  Whatever 
reduction  in  charges  he  may  have  to 
make  will  be  far  more  than  offset  by 
the  volume  increase  in  the  number  of 
his  calls. 

There  is  also  raised  from  time  to 
time  the  question  of  what  effect  tele- 
vision sets  might  have  on  the  sale  of 
radio  receivers.  Because  of  the  tre- 
mendous production,  broadcasting  cost 
and  other  problems  involved,  we  are, 
of  course,  a  long  way  off  from  a  wide 
purchase  and  use  of  television.  But  if, 
and  when  it  comes,  I  am  persuaded 
that  the  small  set  will  continue  to  hold 
its  relative  position  in  the  home  and 
institution,  for  the  same  reasons  that 
apply  in  the  comparison  of  small  sets 
with  the  console. 

As  to  the  future  and  the  retail  op- 
portunities and  possibilities  in  the 
radio  business,  we  at  Emerson  head- 
quarters and,  I  am  sure,  all  of  our 
distributors  and  their  dealers  who,  in- 
cidentally have  virtually  doubled  last 
year's  commitments  to  date,  are  look- 
ing forward  with  greater  confidence 
than  ever  before. 

But  it  is  not  the  manufacturer,  not 
the  distributor  and  not  the  dealer  who 
make  radio  a  profitable  business.  It 
is  the  great  general  public.  Theirs  is 
the  final  word  and  it  is  up  to  all  of  us 
to  manage  our  affairs  in  a  way  which 
will  enable  us  to  produce  and  sell  the 
type  of  merchandise  which,  while  giv- 
ing us  a  reasonable  profit,  will  encour- 
age an  ever  widening  support  of  our 
operations. 


22 


Radio  Today 


Mystifying!     •     Thrill-Packed! 

A  Money  Maker  for  Dealers  ...  A  "Door  Opener" 
to  Countless  New  Sales  Opportunities 

Sensational  TVew  SPARTON 
WIRELESS  PHONOGRAPH 


ND 
ND 

CONNECTIONS 
NECESSARY 


Complete  with  Microphone 


24! 


SPARTON 
Microphone 

This  high  quality  microphone 
is  fully  enclosed  in  metal  case 
with  attractive  cloth  grill  re- 
inforced by  metal  screen. 
Complete  with  approximately 
5  ft.  of  cord  and  plug  in  tips. 

Additional 
MICROPHONES 


$E00 


5 


each 


(Price  subject   to  change 
without   notice) 


HERE'S  multiple  feature  entertainment  that  packs  more 
mystery  and  suspense  than  the  famed  Hindu  rope  trick. 
This  miracle  music  box  looks  and  works  like  an  ordinary 
phonograph  attachment  but  it  works  WITHOUT  ANY  WIRE. 
It  churns  the  wax  disc,  either  10  or  12-inch,  to  serve  up  music 
and  entertainment  clear  across  the  room,  or  from  room  within 
reasonable  limits.  Good  results  have  been  obtained  in  adjoin- 
ing houses  and  across  the  street.  It's  an  electric  ventriloquist 
that  makes  a  "stooge"  out  of  radio. 

Just   Plug   It   In 

...  to  power  outlet  and  snap  the  switch.  Tune  radio  to  the 
frequency  of  the  oscillator  tube  in  the  phonograph  unit  and 
turn  up  the  volume.  Each  unit  is  equipped  with  the  SPARTON 
microphone,  which  makes  all  sorts  of  things  possible. 

Aside  from  its  profit-making  possibilities  this  new  invention 
will  make  an  excellent  "door  opener"  to  thousands  of  homes 
where  obsolete  radios  await  final  discard  when  their  owners 
discover  the  improvements  in  modern  SPARTON  receivers  and 
radio  phonographs.  Be  the  first  in  your  city  to  announce  and 
demonstrate  this  newest  radio  miracle.  A  letter,  postal  card 
or  wire  will  bring  you  the  facts  about  the  SPARTON 
WIRELESS  PHONOGRAPH  and  the  proven  sales  plan  that 
goes    with    it. 

THE    SPARKS-WITHINGTON   CO. 

JACKSON,  MICHIGAN,  U.  S.  fl. 


Sales  Meetings 


October,  1938 


23 


LETTERS  TO  THE  EDITOR 

McMurdo  Silver  points  to  "big  set"  opportunities 
Keene  Jackson   urges  an   end  to   piracy   of   designs 


A  CLEARING  HOUSE  FOR 
RADIO    DESIGNS 

Editor,  Radio  Today: 

I  want  to  point  out  to  you,  as  editor 
of  a  publication  devoted  to  the  best 
interests  of  the  radio  manufacturer, 
jobber  and  dealer,  an  opportunity  for 
a  service  to  the  industry  which  I  be- 
lieve would  be  enthusiastically  re- 
ceived by  all  worthwhile  elements  in 
the  industry. 

Suggesting  a  "Crusade"  for  someone 
else  to  carry  on  is  like  saying  to  a  man 
— "Let's  you  and  him  fight."  But  this 
crusade  should  be  carried  on  by  some- 
one or  an  organization  indirectly  con- 
nected with  the  radio  business. 

When  a  man  steals  your  car  or  your 
money,  you  have  a  recourse  to  the  law. 
But  the  theft,  just  as  flagrant — the 
theft  of  ideas  in  radio  design — of  cir- 
cuits —  of  manufacturing  methods  — 
goes  unpunished. 

No  new  idea  conceived  by  a  manu- 
facturer is  now  safe  from  counterfeit- 
ing by  price  -  cutting  competition. 
Manufacturers  who  spend  thousands  of 
dollars  in  research,  patents  and  de- 
signs are  wide  open  to  copyists  and 
therefore  cannot  harvest  the  fruits  of 
their  efforts. 

I  believe  Radio  Today  can  give  an 
answer  to  this  most  important  ques- 
tion now  confronting  the  radio  manu- 
facturer. 

You  are  in  a  position  to  set  up  a 
central  clearing  bureau,  to  which  I 
believe  reputable  manufacturers  could 
submit  new  set  designs,  circuits  and 
ideas  to  be  recorded  and  notarized.  If 
pirated  later,  the  manufacturer  would 
have  recourse  to  your  published  rec- 
ord, especially  when  the  question  of 
"Who  produced  what  first"  could  be 
proven  by  your  Bureau  of  Registra- 
tion. 

The  moral  pressure  brought  through 
your  publicity  of  all  registered  ideas 
would  bring  on  the  transgressors  un- 
favorable position  throughout  the 
trade. 

If  you  want  to  undertake  this  Bu- 
reau of  Registration  of  new  radio  ideas 
you  can  be  sure  that  International 
Radio  Corporation  will  welcome  the 
opportunity  to  participate,  and  we  pre- 
dict that  you  will  have  very  little  dif- 
ficulty in  obtaining  enthusiastic  agree- 
ment of  all  the  other  manufacturers 
who  abhor  design  piracy  and  have  suf- 
fered from  it. 

W.  Keene  Jackson, 
General  Sales  Manager. 
International   Radio  Corporation, 

Ann  Arbor,  Mich. 

We  think  you  have  a  splendid  idea 
there,  Mr.  Jackson!  Radio  Today  will 
be  delighted  to  offer  its  facilities  to  the 
radio  industry,  if  the  industry  will 
make  use  of  such  a  Bureau  of  Registra- 
tion— and  we  think  it  will.  Comments 
from  other  manufacturers  and  trade 
leaders  will  he  welcomed. — Editor, 
Radio  Today. 


NOW  IS  THE  TIME  TO  INCREASE 
PROFITS  THRU  "BIG-SET"  SALES! 

Editor  Radio  Today: 

I  have  noticed  with  interest  recent 
comments  upon  the  lack  of  profit  pos- 
sible to  the  dealer  concentrating  upon 
the  sale  of  $10  and  $15  radios.  In  at 
least  one  case  I  have  seen  arithmeti- 
cal demonstration  of  the  certain  loss 
which  follows  any  attempt  to  profit 
from  the  sale  of  compact  radios 
through  sizeable  expenditures  to  ad- 
vertise such  radios. 

Possibly,  going  into  my  28th  year  in 
radio,  and  never  having  produced  a 
single  radio  in  this  low  price  range,  I 
am  least  fitted  to  add  my  voice  to  this 
discussion,  yet  the  very  objectivity 
which  non-participation  makes  pos- 
sible may  make  my  views  of  interest. 

In  the  main,  all  economic  develop- 
ments are  the  result  of  economic  needs 
— and  in  the  same  pseudo-philosophic 
sense,  all  economic  evils  are  self-cor- 
rective. Thus,  if  the  radio  dealer  finds 
he  can't  make  money  selling  any  class 
of  merchandise,  he  quits  one  way  or 
another,  and  the  evil,  if  evil  it  be,  is 
self-corrected — sometimes  rather  pain- 
fully to  the  individual. 

If  consumers  wouldn't  buy  $10  and 
$15  compacts,  they  would  not  be  made 
and  offered  for  sale.  Their  manufac- 
ture and  sale  proves  their  soundness 
economically — that  they  fill  a  specific 
demand.    And  the  dealer  who  does  not 


GETS  PARIS  EXPO  GRAND  PRIX 


This  McMurdo  Silver  custom-built 
Masterpiece,  with  Clifton  console,  was 
awarded  the  grand  prize  at  the  Paris 
International  Exposition  of  1937,  ac- 
cording to  cables  just  reaching  Mc- 
Murdo Silver  at  Chicago. 


offer  what  his  customer  asks  for  is 
foolish — exactly  as  is  the  dealer  who 
would  try  to  force  all  sales  into  a 
single  groove.  Either  just  can't  be 
done   successfully. 

The  essence  of  the  question  seems 
to  me  yet  to  be  stated — admitting  that 
cheap  compacts  have  a  logical  market, 
the  question  is  how  is  the  dealer  to 
confine  these  sales  only  to  their  logical 
market?  How  is  he  to  prevent  the  loss 
of  the  large-profit  sales  which  are  ab- 
solutely essential  to  his  continued  ex- 
istence? How,  in  brief,  is  he  to  pre- 
vent the  prospect  who  can  and  should 
buy  a  good  radio,  from  contenting 
himself  with  the  purchase  of  nothing 
but  a  compact,  producing  little  or  no 
net  profit  to  the  dealer? 

His  job  is  one  for  which  Radio 
Today  can  profitably  continue  to  seek 
the  solution.  The  desirable  solution  is 
one  of  a  nice  balance  of  compact  to  big 
radio  and  combination  sales — the  con- 
dition wherein  compact  sales  are  held 
to  their  logical  market  of  "second  set," 
servant  quarters,  nursery,  and  very 
low  income  group  sales  where  nothing 
more  profitable  to  the  dealer  is  pos- 
sible. 

How  to  determine  when  a  more  prof- 
itable sale  is  possible  is  not  exces- 
sively difficult,  yet,  depending  as  it 
does  upon  individual  circumstances, 
some  "rule  of  thumb"  applicable  to  all 
cases  is  desirable. 

Is  not  such  "rule  of  thumb"  the  ac- 
tual demonstration  to  the  compact 
prospect  of  the  finer  results  he  will  ob- 
tain, particularly  upon  the  music 
which  is  the  majority  of  all  radio  en- 
tertainment, from  larger  sets?  Could 
not  Radio  Today  develop  a  technique 
to  aid  the  dealer  in  shifting  prospect 
attention  from  cheap  compacts  to  large 
sets?  To  me,  the  simplest  method  is 
an  unostentatious  tuning  on  of  a  large 
set  close  to  the  compact  display  in  or- 
der that  the  prospect  may  perceive  the 
difference,  and  the  wisdom  of  forget- 
ting a  compact  in  those  cases  where 
he  is  buying  his  "main"  or  only  radio. 

Distracts  attention 

Certainly  the  thought  of  any  but  the 
largest  department  store  or  dealer 
regularly  accustomed  to  very  heavy 
prospect  traffic  spending  sizeable 
amounts  upon  compact  advertising 
seems  absurd.  The  average  dealer  will 
not  get  sufficient  returns  to  so  justify, 
and  the  belief  that  a  $10  compact  set 
will  attract  enough  prospects  who  can 
be  traded  up  to  really  profitable  sales 
seems  most  remote.  However  I  look 
at  it,  the  sale  of  compact  radios  does 
not  seem  to  justify  advertising  ex- 
penditure by  the  small  dealer,  if  for 
no  other  reason  than  that  in  itself  it 
distracts  public  attention  from  the 
high-priced  radios  he  must  sell  in 
order  to  live,  and  so  makes  big  sales 
even  harder  to  get.  Much  more  sens- 
ible seem  his  advertising  of  the  new 
features  of  big  sets  and  combinations, 
for,  if  he  must,  he  can  then  fall  back  to 
a  compact  sale.  In  such  manner  he  does 
not  impair  his  chances  of  big  set  sales 
by  having  advertised  the  prospect  into 
the  belief  that  all  the  best  of  radio 
entertainment  costs  today  is  $9.95. 

Which  brings  us  to  another  phase  of 
the  dealer's  problem — how  to  sell  big 
sets.  Because  so  far  in  1938  economic 
(Continued  on  page  66) 


24 


Radio  Today 


CUSTOMERS'  PRESENT  RADIOS 
MAKES  NEW  ONES  BETTER  STILL 

Om  20,000,000  Papeete! 


TO  visualize  the  tremendous  sales  possi- 
bilities of  Kadette  Tunemaster,  just  im- 
agine yourself  lounging  at  ease  the  whole 
evening  through,  really  enjoying  radio  as 
you  have  never  enjoyed  it  before.  Never 
once  is  the  spell  broken  by  having  to  leave 
your  chair  to  change  programs  or  adjust 
volume.  Think,  too,  how  convenient  for 
the  busy  housewife.  She  can  carry  Tune- 
master  from  room  to  room  and  operate  a 
radio  anywhere  else  in  the  home  as  easily 
as  if  sitting  beside  it. 

But  this  is  only  the  beginning  of  the 
alluring  sales-compelling  picture.  Tune- 
master  actually  improves  reception — sharp- 
ens tuning — increases  sensitivity — gets  dis- 
tant stations  with  greater  volume.  In  addi- 
tion, it  provides  push-button  tuning  for 
four  stations,  remote  volume  control  and 
true  wireless  tuning — not  for  just  a  few 
stations — but  for  every  station  on  the  broad- 
cast band  from  540  to  1500  Kilocycles!  Yet, 
the  radio  can  still  be  used  as  before.  Nothing 
is  added  to  it — nothing  taken  away.  Merely 


plugging  Tunemaster  into  any  electric  out- 
let   (AC   or   DC)  is  the  only   installation! 

You  don't  merely  tell  this  exciting  story 
— you  PROVE  it!  Tunemaster  itself  backs 
up  every  word.  There's  something  you  can 
REALLY  sell,  and  virtually  every  radio 
owner  is  an  immediate  prospect.  You  will 
find,  too,  that  a  surprisingly  high  per- 
centage who  come  to  buy  Tunemaster  will 
easily  be  persuaded  to  replace  antiquated 
radios  with  new  ones,  and  those  who  come 
to  buy  a  new  radio  will  be  just  as  easily 
persuaded  to  add  Tunemaster. 

What's  more,  there  will  be  no  lack  of 
opportunities  for  such  sales.  Powerful  na- 
tional advertising  that  starts  with  a  full 
page  in  the  November  5  issue  oi  SATURDAY 
EVENING  POST  will  soon  have  millions 
looking  for  Tunemaster.  Someone  in  your 
community  is  going  to  grab  this  unpar- 
alleled opportunity,  and  it  might  as  well  be 
YOU.  Mail  the  coupon  on  the  right  for  full 
details.  INTERNATIONAL  RADIO  COR- 
PORATION, Dept.  P-110,  Ann  Arbor, Mich. 


Mail 


COUPON  NOW 


DKADETTE  RADIO 


INTERNATIONAL 
RADIO  CORP. 

ANN  ARBOR,  MICH. 


INTERNATIONAL 
RADIO  CORPORATION 
Dept.  P-110,  Ann  Arbor,  Michigan 

Rush  full  information  about  KADETTE 
TUNEMASTER  and  vour  new  LIMITED 
DEALER-FRANCHISE  plan. 


By  . 


City. 


.State. 


October,  1938 


25 


NEW   THINGS 

Latest   news    of  radio   products    from   manufacturers 


C-B   unilyzer 

*■  Radio  set  test  unit  for  socket 
analysis  and  point-to-point  tests. 
Two  rotary  switches  provide  all 
socket  connections.  AC-DC  type 
meter  has  29  ranges  including  ca- 
pacity, output,  and  decibels.  Func- 
tion switch  and  range  switch  used 
in  a  new  safety  sequence  arrange- 
ment. Model  285.  Clough  Brengle 
Co..  2815  W.  19th  St.,  Chicago,  111  — 
Radio  Today. 


Adjustable  plug-in  resistors 

*  Plug-in  resistors  for  replace- 
ment in  AC-DC  receivers.  Mounted 
in  shell  similar  to  that  of  metal 
tube.  Three  types  adjustable  so  as 
to  fit  99  per  cent  of  the  units  now 
in  use.  Chart  lists  over  800  plug-in 
line  resistors  which  may  be  re- 
placed by  the  3  units.  List  $1. 
J.  F.  D.  Mfg.  Co.,  4111  Ft.  Hamilton 
Pky,  Brooklyn,  N.  Y. — Radio  Today. 


Dual  Minicap  condensers 

*  Dual  midget  dry  electrolytic 
condensers.  Occupies  less  space — 
has  permanent  sealing.  Has  char- 
acteristics of  the  single-unit  Mini- 
cap  condensers.  Solar  Mfg.  Corp., 
599  Broadway,  New  York,  N.  Y  — 
Radio  Today. 


World  time  gadget 

*  Radio  world  time  indicator 
gadget  for  determining  the  time  in 
any  part  of  the  world.  Will  also 
show  the  time  difference  between 
any  two  cities.  Device  is  5  x  7 
inches  and  printed  in  two  colors  on 
light  yellow  stock.  Priced  at  50 
cents.  Radio  &  Technical  Publish- 
ing Co.,  45  Astor  Place,  New  York, 
N.  Y  —  Radio  Today. 


Auto  filter  units 

*  Complete  line  of  auto  filter 
replacement  condensers.  Mechan- 
ical design  similar  to  those  supplied 
by  the  majority  of  auto  radio  set 
manufacturers.  Designed  to  with- 
stand excessive  temperatures  and 
vibration  existing  in  autos.  Some 
units  with  special  mounting  brack- 
ets. Described  in  catalog  161 
Cornell-Dublier  Corp.,  S.  Plainfield, 
N.  J. — Radio  Today. 


Million  tube  checker 

*  Push-button  tube  tester  with 
direct-reading  meter.  Emission 
tests  for  all  tubes.  Hot  leakage 
and  short  tests.  Voltage  adjustment 
and  pilot  light.  Open  filament  in- 
dicator for  metal  tubes.  Model  MO 
for  counter — net  $18.95.  Model 
MOP  for  portable  use  $19.95.  Mil- 
lion Radio  &  Television  Labs.,  685 
W.  Ohio  St.,  Chicago,  111.— Radio 
Today. 


Bumper  aerial  kit 

*  Bumper  aerial  for  use  with 
auto  radios.  Does  not  damage  or 
disfigure  car.  Kit  consists  of  4  in- 
sulators, shielded  cable,  attachment 
clips,  and  grommet.  L.  S.  Brach 
Mfg.  Corp.,  55  Dickerson  St.,  New- 
ark, N.  J. — Radio  Today. 


Ward  vertical  aerial 

*  Self-supporting  antenna  with 
4-section  bronze  tubing  12  feet  high. 
Lightning  arrester  and  .002  mfd. 
for  additional  capacity  required  by 
receivers.  Easily  installed  to  roof, 
wall,  vent  pipe,  window  frame,  om- 
plete  with  low-loss  insulators.  Ward 
Products  Co.,  1523  E.  45th  St., 
Cleveland,  Ohio. — Radio  Today. 


Adjustable  power  resistors 

■*  Wire-wound  power  resistors 
with  adjustable  band.  Coating  of 
inorganic  cement  solidified  with 
very  low  heat  treatment.  Unit  may 
be  operated  at  red  heat  without 
deterioration.  Removable  mount- 
ing feet.  Units  available  in  10  to 
200-watt  ratings.  Clarostat  Mfg. 
Co.,  Inc.,  285  N.  6th  St.,  Brooklyn, 
N.  Y  —  Radio  Today. 


Replacement  speakers 

*  Speakers  for  replacement  in 
table  type  radios.  Will  handle  2% 
watts  output.  Universal-type  trans- 
former for  single  and  push-pull 
tubes.  Universal  field.  Fully  rust- 
proof. Available  in  5,  6,  8  inch 
diameters.  Type  E5LU  5-inch  unit 
list  $3.10.  Wright-DeCoster,  Inc., 
St.  Paul,  Minn. — Radio  Today. 


26 


Radio  Todav 


THE 

aim 

€*©*tfr¥ 


"THESE  ARE  PART  OF 
THE  GREATEST  LINE  IN 
€*©*bE*'S  17  YEAR 
RADIO  HISTORY" 


RADIO 

PHONOGRAPHS 


PORTABLE  COMBINATION 


A   highly  efficient   and    simple    CrosleY   d 
self-starting  record    playing  mechanism 

■  "         '        ---sh  button 


bination   with 


24 


95 


Crosley  p 
wooden 


'eloped 
radio. 


len    cover    with    handle 
turntable    pick-up    and 
~iuel.     A  switch  changes 
honograph. 
with  volume 
tdes   unusual  per- 
:ord  playing. 


radio  pa 
from    rad„ 
Efficient  pick-up 
control   prov"  * 
formance  ii 


CONSOLE 
COMBINATION 


A  full  size  console, 
the  quality  of  per- 
formance —  record 
pick  up — radio  am* 
pHfication  and 
speaker  reproduc- 
tion—delights all 
hearers.  It's  a 
Monderful  value 
and  it  gives  a  won- 
derful perform- 
ance. A  flip  of  a 
switch  plays  cither 
radio  or  phonograph. 


49 


95 


New  Crosley  push  button 
radio  incorporated  in  this 
model  makes  this  combina- 
tion a  wonderful  value  and 
gives  every  indication  of  its 
being  top  seller  in  its  field. 


Factory  production  facilities  taxed.  Amazing 
reports  of  sales  that  sound  like  the  radio  days 
of  the  20's — enthusiasm  from  coast  to  coast — 
that's  the  Crosley  radio  picture  NOW.  Ride 
these    winners  to    a    profitable    radio    season. 


6  TUBE  2  BAND  PUSH  BUTTON 
SUPERHETERODYNE         ^ 


Refinements  and  im- 
provements added  to  an 
efficient  radio  of  which 
over  half  a  million  have 
been  built,  plus  an  extra 
tube,  produces  a  start- 
ling value  in  this  new 
1939  "Sixer".  Plastic 
cabinet — easily  adjusted 
push  button  tuning — as 
well  as  manual  tuning. 


AMAZING  PUSH  BUTTON  RADIO 

$^\  Q  Q  Incorporating  the  new  Crosley  Push 
y  w  u  Button  tuning  technique — positive, 
mf  sharp — easily  adjusted  on  the  button 

for  any  station.  An  amazing  value. 

Prices  slightly  higher  in  South  and  West. 

7  TUBE   SUPERHETERODYNE 

2  BAND  (American  and  Foreign)  PUSH  BUTTON 


CUNSOLE 
$4995 


A  2  band  (American  t  a  n  1  r 
and  foreign)  5  push   I  AdLL 


button  receiver  with 
electric  eye  tuning 
— a  radio  log  dial  (99 
stations  located).  Lay  down  (pic- 
tured) and  upright  table  models. 
Exquisitely    fashioned    console. 


NOW  MORE  THAN  EVER 
YOU'RE    THERE   WITH   A 

THE  CROSLEY  RADIO  CORP.,  CINCINNATI  •  POWEL  CROSLEY,  Jr.,  Pre*.  •  Home  of  "the  Nation's  Station"— WLW— 70  on  your  dial 

October,  1938  27 


MORE   NEW   THINGS 


Portable  radio-phono 
combination 

*  Semi-automatic  phonograph- 
radio  combination.  Pick-up  assem- 
bly mounted  in  lid  of  case.  When 
lid  is  lowered,  needle  is  automatic- 
ally set  in  groove  of  record.  AC-DC 
motor  and  chassis.  Speed  regulator. 
Built-in  copper  screen  aerial.  Tun- 
ing controls  on  front.  Model  80-F 
with  fabricoid  case — list  $89.95. 
Portomatic  Corp.,  1015  Madison 
Ave.,  New  York,  N.  Y—  Radio  To- 
day. 


Battery  receiver 

*  1%-volt  battery  receiver  for 
farm  use.  Uses  4  tubes  in  low-drain 
circuit.  5-inch  P.M.  speaker.  Tunes 
540-1730  KC.  Automatic  volume 
control.  Walnut  cabinet.  Allied  Ra- 
dio Corp.,  833  W.  Jackson  Blvd., 
Chicago,  111. — Radio  Today. 


Tubemaster 

*  Tube  tester  for  accurately  de- 
termining the  dynamic  performance 
of  the  tube.  Basic  features  of  dy- 
namic-mutual      conductance       and 


power  output  are  combined  in  a 
single  reading.  Circuit  called  Dyna- 
power.  Roll  chart  shows  set  up  of 
switches.  Direct  reading  meter. 
Model  20— net  $29.50.  John  Meek 
Instruments,  164  N.  May  St.,  Chi- 
cago, 111. — Radio  Today. 

High-voltage  condenser 

*  Paper-type  condensers  for 
high-voltage  circuits.  Designed  for 
heavy  duty  operation  in  transmit- 
ters and  industrial  apparatus.  Oil- 
impregnated  and  wax-filled.  Metal 
cased  with  ceramic  stand-off  insu- 
lators. American  Condenser  Corp., 
2508  S.  Michigan  Ave.,  Chicago,  111. 
— Radio  Today. 


Insulated   resistors 

*•  Kit  of  insulated  resistors  for 
replacement  purposes.  Steel  cab- 
inet given  free  with  the  purchase  of 
250  or  500  Ex-stat  insulated  1-watt 
resistors.  Units  have  ceramic  in- 
sulation with  cement-filled  ends. 
Color-coded  and  stamped  with  value. 
Tilton  Electric  Corp.,  15  E.  26th  St., 
New  York,  N.  Y. — Radio  Today. 


Univex  Mercury  candid 
camera 

*  Super-speed  candid  camera 
with  f:3.5  lens  and  focal -plane 
shutter  speeds  up  to  1/1000  of  a  sec- 
ond. Every  adjustment  on  front  of 
camera  for  convenient  operation. 
Built-in  photo-flash  synchronizer. 
Automatic  film  transport  eliminates 
double-exposure  hazard.  Exposure 
calculator  and  depth  of  focus  scale. 
Uses  35  mm.  film  (ultrachrome) 
costing  40  cents  for  36  exposures. 
Interchangeable  lenses  up  to  f:2. 
Universal  Camera  Corp.,  46  W.  23rd 
St.,  New  York,  N.  Y—  Radio  Today. 


Transmitter  kit 

+  Self-contained  transmitter  kit 
for  phone  and  C.W.  operation. 
Crystal  controlled.  Plug-in  coils 
for  operation  on  1.6  to  60  mega- 
cycles. Meter  switching,  oscillator 
keying  for  break-in.  Punched  chas- 
sis and  panels,  as  well  as  transform- 
ers available  from  Stancor.  Parts 
are  standard  stock  items.  Stand- 
ard Transformer  Corp.,  1500  N 
Halstead  St.,  Chicago,  111. — Radio 
Today. 


High-voltage  resistors 

*  Resistors  designed  for  use  at 
voltages  from  5,000  to  100,000  volts. 
Metallized  element  on  ceramic  tub- 
ing. Spiral  application  of  element 
provides  a  long  path.  A  150-watt 
100,000  volt  unit  measures  only 
18%  inches  by  2-inch  diameter. 
IRC  type  MV.  International  Re- 
sistance Co.,  401  N.  Broad  St., 
Philadelphia,  Pa. — Radio  Today. 


Jumbo  volt-ohm-milliammeter 

*  Nine-inch  multi-range  meter 
for  radio  and  sound  servicing.  350 
microamp  movement.  AC  and  DC 
voltage  ranges  of  0/10/50/250/500/- 
2,500.  DC  current  of  0/y2/5/50/500 
milliamperes.  Resistance:  0/30/- 
lOM/lmeg/lOmeg.  Also  calibrated 
in  decibels.  Accuracy  within  2  per 
cent  on  both  AC  and  DC.  Model 
4922— net  $34.50.  Hickok  Electrical 
Instrument  Co.,  DuPont  Ave., 
Cleveland,  Ohio. — Radio  Today. 


28 


Radio  Today 


iedafy& 


530  to  1600  Kc.  Coverage  •  Four  Tuned  Circuits 
Using    Ferrocart     (Iron    Core)     Shielded    R.F. 
Transformers     •     4-Gang     Precision     Tuning 
Condenser  •  High-Q  Coils — Enormous  Gain 
and  Selectivity  •  Full  Automatic  Vol- 
ume   Control    •    Audio    Gain   and 
Tone  Controls  •  Works  With 
Any    Amplifier    Input    ' 
Self-Contained  Power 
Supply 


Wire   It   Yourself! 

Here  is  the  special-purpose  job  you  have  been 
looking  for.  It  is  a  T.R.F.  circuit  designed  just 
for  P. A.  work.  Provided  with  a  dual  audio- 
output  channel,  so  that  one  channel  may  be 
used  for  monitoring  purposes  without  giving, 
in  the  P. A.  channel,  any  indications  of  the 
switching  done  in  the  monitoring  circuit.  The 
absence  of  oscillators  makes  this  tuner  abso- 
lutely non-interfering  regardless  of  the  num- 
ber that  may  be  grouped  to- 
gether in  a  multiple-channel 
P.A.   system    


$2325 


This  P.A.  Tuner  is  supplied  in  complete  kit 
form  including  all  coils,  4-gang  variable  con- 
denser, power  transformer,  fixed  condensers, 
resistors,  sockets,  knobs,  dial  and  escutcheon, 
punched  and  drilled  heavy  steel  chassis,  miscel- 
laneous small  parts,  hardware,  pictorial  and 
schematic  diagrams  and  clearly  written  detailed 
instructions  for  assembling,  wiring  and  operat- 
ing. (NOT  including  Panel,  Cabinet,  or  Tubes.) 
And  it  is  GUARANTEED  to  work  satisfactorily 
or  the  Meissner  Manufacturing  Company  will 
fix  it  for  you — even  supplying  a  shipping  car- 
ton for  returning  it  to  the  factory! 

Tuner  is  designed  so  that  two  of  them  can  be 
mounted  side  by  side  in  one  relay-rack  panel. 
(8%"x8% "X12V2  "•)  Also  making  it  small 
enough  for  portable  use.  Contains  its  own  power 
supply.  Operates  from  110-volt  line.  Black 
crystal  front  panel  75*1.  Black  crystal  cabinet 
$2.85.     ASK  YOUR  PARTS  JOBBER. 


'A     FAMOUS     NAME     FOR     TWO     DECADES" 

October,  1938  29 


PRIMARY 
INDUCTOR 


^-"-'      50  M 

-SENSITIVITY 
CONTROL 


2A4G 
THYRATRON 

CHOKE 

AVC 
0005S6J5G 

.02 

V  V 

III  >  /<fc\ 

-i 

f) 

HSidn 

J 

STEPPER; 

UNIT 
COILS 

.05 
. II 

~- 

b-  ria«; 

— ~fMA — 
750  M     1 

4M> 

1           II   S    ■ 
:          i 

^.05 

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^m5" 

rwsv 

DIAL  UNIT 
OR    PULSER 


1                           1 

AC      i 

SECONDARY 
INDUCTOR 
(LOOP) 


FREQUENCIES 

CODES-   355    KC       CODE  6-  367  KC 

CODE7-375KC       C0DE8-383KC 

CODE  9-  395    KC 


Fig.    1 — Circuit    of    the 
"Mystery  Control"  box. 


Fig.  2 — Control  signal  amplifier  amplifies  the  pulses    picked   up    by    the    secondary    inductor 
(loop)  and  passes  them  on  to  the  thyratron  tube  which  operates  the  station  selecting  mechanism. 


HOW  THE  MYSTERY  CONTROL  WORKS 

Simplified  explanation  of  new  wireless  tuner.  Exclusive  to  Radio  Today 


•k  Briefly,  the  Philco  "mystery  con- 
trol" is  a  remote  control  device  which 
transmits  impulses  to  an  amplifier  to 
operate  a  stepper  type  relay  to  select 
the  desired  station.  Its  principle  of 
station  selection  is  similar  to  that  of 
the  dial-type  telephone  except  that  no 
connecting  wires  are  needed. 

In  Fig.  1  the  circuit  of  the  control 
box  is  shown.  The  tube  and  coils  form 
an  oscillator  which  can  be  pre-set  to 
355,  367,  375,  383  or  395  kilocycles. 
The  dial  mechanism  is  technically 
termed  the  "pulser  unit,"  since  it  keys 
or  pulses  the  output  of  the  oscillator. 

As  the  control  box  is  battery  op- 
erated, the  device  is  only  turned  on 
while  selecting  a  station  or  changing 
the  volume.  This  means  the  battery 
drain  is  practically  nothing.  When  the 
dial  is  operated,  the  filament  circuit  to 
the  tube  is  closed  by  means  of  the 
lower  switch  arm  and  the  continuous 
contact  bar. 

Pulses  tune  radio 

The  pulses  are  caused  by  making 
and  breaking  the  plate  battery  circuit. 
As  the  dial  mechanism  turns,  the  plate 
circuit  is  opened  and  closed  as  the 
switch-arm  touches  the  equally-spaced 
contacts.  Each  station  has  a  certain 
definite  number  of  contacts  that  must 
be  made.  Corresponding  to  the  station 
to  be  dialed,  from  4  to  11  pulses  are 
transmitted  by  the  device.  Two  pulses 
increase  the  volume  of  the  set,  while 
3  pulses  decrease  the  volume.  During 
the  volume  changes,  a  thumb-lever  is 
held  down  which  causes  a  continuous 
signal  to  be  emitted.  This  lever  is  re- 
leased when  the  volume  reaches  the 
proper  value. 

The  signal  from  the  control  box  is 
transmitted    to    a    loop    or    secondary 


coil  in  the  radio  set  by  induction.  The 
remote  control  box  has  a  tuned  coil 
(oscillator  coil)  which  acts  as  a  pri- 
mary to  induce  a  signal  in  the  sec- 
ondary. The  coil  in  the  control  box 
can  be  likened  to  the  primary  of  an 
induction  coil.  When  a  current  flows 
in  the  primary,  a  current  is  induced 
in  the  secondary.  The  dimensions  of 
both  coils  are  made  as  large  as  pos- 
sible  so  as  to  effect  a  maximum  trans- 
fer of  energy. 

In  the  mystery  control  it  is  desired 
to  transfer  energy  over  a  distance  ap- 
proaching 75  feet  while  avoiding  any 
form  of  wire  connection.  It.  is  also 
desired  to  limit  the  maximum  oper- 
ating range  of  the  device  as  sharply 
as  possible.  For  numerous  reasons, 
electromagnetic  induction  (rather  than 
radiation)  seems  to  be  the  most  suit- 
able means  for  the  purpose. 

Pulse  amplifier 

Because  the  pulses  sent  out  from 
the  primary  (remote  box)  unit  are 
rather  feeble  at  the  radio  set,  it  is 
necessary  to  amplify  them  before  they 
are  strong  enough  to  control  the  se- 
lector mechanism.  The  pulses  are 
picked  up  by  the  secondary  coil  in  the 
radio  set  as  shown  in  Fig.  2. 

The  tuned  secondary  coil  responds 
only  to  impulses  to  which  it  is  tuned,  so 
it  is  necessary  to  tune  the  remote  oscil- 
lator to  the  frequency  of  the  secondary 
coil  and  amplifier.  As  the  range  of  the 
remote  control  device  may  be  75  feet 
under  normal  conditions,  a  variable 
frequency  in  both  the  oscillator  and 
amplifier  is  provided  so  that  no  inter- 
ference will  be  produced  on  neighbor- 
ing mystery  control  sets.  A  choice  of 
5  frequencies  from  355  to  395  KC  is 
provided    to   eliminate    the    possibility 


of  two  or  more  sets  interfering  with 
one  another. 

The  signals  picked  up  by  the  loop 
are  coupled  to  a  tuned  grid  coil  by  a 
low-impedance  link  circuit.  From  the 
grid  coil,  the  signals  go  through  two 
stages  of  amplification  to  the  grid  of  a 
2A4G  thyratron  tube.  The  output  from 
the  thyratron  tube  is  fed  into  the  re- 
lays which  in  turn  control  the  stepper 
unit  and  station  selecting  switch. 

Sensitivity  control 

In  the  control  (pulse)  amplifier 
circuit  there  is  a  sensitivity  control 
which  is  employed  for  the  purpose  of 
adapting  the  set  to  the  particular  lo- 
cation where  it  is  used.  This  control 
is  in  the  cathode  of  the  type  78  first 
amplifier  tube. 

The  setting  of  this  sensitivity  con- 
trol is  of  tremendous  importance  to 
the  mystery  control  operation. 

The  normal  range  of  mystery  con- 
trol is  within  a  circle  of  the  receiver 
with  a  radius  of  about  25  feet.  It  is 
important  to  remember  that  mystery 
control  operates  in  a  circle  around  the 
receiver  cabinet.  To  get  the  most  from 
mystery  control  it  is,  therefore,  advis- 
able to  place  the  cabinet  as  close  to 
the  center  of  the  "operating  circle"  as 
possible.  If  the  receiver  is  located 
against  the  front  wall  of  a  home  only 
half  of  the  effective  operating  area  is 
within  the  house.  The  remainder  is 
outside  the  walls.  There  is  a  distinct 
advantage  in  operating  the  control  am- 
plifier sensitivity  control  at  the  low- 
est possible  setting.  Extra  sensitivity 
in  the  control  frequency  amplifier 
is  provided  so  as  to  permit  operation 
in  the  presence  of  inductive  shields 
such  as  steel  girders,  metal  lath  con- 
struction and  large  bodies  of  metal — 


30 


Radio  Today 


furnaces,  boilers,  stoves,  refrigerators, 
chandeliers,  or  any  similar  metallic 
objects. 

The  sensitivity  of  the  control  fre- 
quency amplifier  is  variable  to  fit  a 
large  range  of  operating  conditions. 
Normally,  sufficient  precautions  are 
taken  in  the  amplifier  and  remote  con- 
trol circuits  to  greatly  reduce  the  pos- 
sibility of  electrical  interference.  The 
control  amplifiers  are  very  much  less 
subject  to  interference  than  an  ordi- 
nary radio  receiving  system.  It  re- 
quires an  extreme  and  unusual  type  of 
interference  to  interfere  with  the  op- 
eration of  mystery  control.  There  is 
no  possibility  of  interference  affecting 
mystery  control  receivers  if  the  sensi- 
tivity control  is  kept  down  to  the  first 
half  of  its  total  movement.  This  illus- 
trates the  importance  of  setting  the 
sensitivity  control  to  the  minimum  po- 
sition possible. 

In  some  installations,  however, 
owing  to  the  presence  of  large  metal 
objects  around  or  near  the  receiver 
chassis  of  the  mystery  control  cab- 
inet, it  will  be  necessary  to  increase 
the  sensitivity  of  the  control  fre- 
quency amplifiers  owing  to  the  absorp- 
tion of  the  metal  surfaces.  When  this 
occurs,  it  will  very  likely  be  found  that 
the  same  metal  objects  are  shielding 
the  receiver  from  excess  static  which 
would  normally  interfere  with  the 
mystery  control  circuits  in  a  high  set- 
ting of  the  sensitivity  control.  There- 
fore, when  it  is  necessary  to  increase 
the  setting  of  the  sensitivity  control 
in  order  to  get  operation  of  mystery 
control,  you  will  very  likely  find  that 
interference  is  not  present  and  that  a 
higher  setting  of  the  control  is  pos- 
sible. In  all  installations  be  careful 
to  set  the  sensitivity  control  at  the 
lowest  possible  position  and  to  locate 
the  receiver  away  from  metal  objects 
which  would  absorb  the  induction  field 
of  mystery  control. 

The  6ZY5G  and  6J5G  tubes  act  as  a 
noise  gate  to  exclude  unwanted  inter- 


ference which  might  control  the 
stepper  assembly.  This  noise  gate 
makes  the  amplifier  respond  only  to 
pulses  having  a  time  interval  equal 
to  that  of  the  pulser  mechanism.  Thus 
pulses  of  random  timing  do  not  op- 
erate the  set. 

The  operation  of  the  thyratron  tube 
is  entirely  different  from  any  tube  so 
far  encountered  by  the  radio  service- 
man. It  is  a  gas-filled  tube  which  can 
handle  large  plate  currents — in  other 
words,  large  amounts  of  power.  For 
a  detailed  explanation  see  page  62  of 
this  issue. 

Before  getting  into  the  operation  of 
the  stepper  relay  unit  for  station  se- 
lection, the  R.F.  circuits  of  the  re- 
ceiver should  be  examined.  In  Fig.  3 
a  simplified  schematic  of  the  wave- 
switch  and  its  circuits  is  shown.  The 
wave  switch  selects  any  one  of  three 
wave-bands  or  automatic  tuning  (mys- 
tery control  operation). 

Tuning  circuits 

To  illustrate  the  automatic  opera- 
tion, the  wave  switch  has  been  drawn 
in  that  position.  The  wave-switch  sec- 
tions disconnect  the  R.F.  amplifier 
from  the  circuit  and  transfer  the  an- 
tenna coil  to  the  grid  of  the  converter 
tube.  Also,  the  antenna  coil  is  con- 
nected to  the  station  selector  switch 
which  selects  the  proper  trimmer  con- 
denser for  any  one  station.  The  gang 
condenser  is  cut  out  of  the  circuit  for 
remote   operation. 

The  oscillator  coil  system  Is  torn- 
pletely  cut  out  of  the  circuit  and  trim- 
mer type  inductances  with  iron-core 
tuning  are  connected  by  the  station  se- 
lector switch. 

A  third  rotary  switch  turns  on  the 
proper  station  indicator  lamp. 

The  assembly  for  the  station  select 
ing  circuits  is  located  beneath  the 
chassis  and  is  driven  by  the  stepper 
assembly. 

There  are  three  groups  of  contacts 
operated    by    the    switch.    One    group 


switches  in  the  oscillator  coils,  the 
second  group  switches  in  the  antenna 
padding  condensers  and  the  third 
group  of  switches,  lights  the  pilot 
lamps  indicating  the  station  dialed. 

Excessive  friction  in  this  switch 
would  cause  improper  action  of  the 
stepper  assembly.  It  should  be  ad- 
justed so  that  when  the  relays  have 
selected  the  station  dialed,  the  contact 
arm  is  squarely  on  the  contact.  The 
tension  of  the  contact  arm  is  regu- 
lated by  the  setting  of  the  hub  on  the 
switch  shaft.  The  long  wiper  contacts 
exert  a  firm  pressure  on  the  contacts 
which  may  be  increased  or  decreased 
by  adjusting  the  location  of  the  hub. 
The  position  of  the  contact  arm  is  de- 
termined by  the  set  screws  which  hold 
the  driver  arm  onto  its  shaft.  This  is 
located  above  the  chassis  but  beneath 
the  stepper  assembly.  If  the  contact 
arms  do  not  come  to  rest  on  the  con- 
tacts it  may  be  necessary  to  loosen  the 
set  screws  on  the  switch  shaft  and  re- 
locate the  position  of  the  driver  arm 
so  that  the  contacts  are  made  cor- 
rectly. Excessive  tension  in  the  switch 
would  act  as  a  load  on  the  relays  and 
might  result  in  chattering  on  one  of 
the  stations,  part  way  up,  and  then 
failing  to  reach  the  station  dialed. 

Stepper  assembly 

The  stepper  assembly  which  oper- 
ates the  station  selecting  switch  is  op- 
erated by  the  thyratron  tube  referred 
to  previously.  The  coils  which  operate 
this  assembly  as  shown  as  the  plate 
load  of  the  thyratron  in  Fig.  2. 

When  the  thyratron  tube  lights,  the 
holding  relay  closes  and  the  stepping  re- 
lay pushes  a  ratchet  as  many  times  as 
there  are  pulses  sent  out  by  the  pulser 
in  the  mystery  control  box.  There  is  a 
primary  and  a  secondary  ratchet.  The 
stepper  relay  operates  the  primary 
ratchet  which  is  connected  to  the  pri- 
mary switch.  This  switch  controls  the 
volume  control  motor  and  shorts  the 
(Continued  on  page  62) 


Fig.   3 — Signal   selecting   circuits  showing   arrangement   of   contacts   on   stepper 
assembly.     Wave-change    switch    in    receiver    is    shown    in    automatic    position. 


AUTO 

v 

M--~ 

AUTO 

,     N.            ,         ■     '     ' 

•  POL 

r       •sw 

BC       _L  V 

POL*       XT 
2  MEG  i 

XI- 

SWITCH  VOLUME     CONTROL 

MOTOR      SWITCH 


t|  si  si  4-rjj.  ;  y  jjtf  y  $n/  v  L  U 


H       G        F        E       0       C        B       At»-STATIONS 


MORE  NEW  THINGS 


Philco  compact 

*  5-tube  table  type  receiver  with 
single-band  coverage.  Illuminated 
dial,  walnut  cabinet.  Dynamic 
speaker,  pentode  power  output. 
Model  6C.  Also  available  in  white. 
Philco  -Radio  &  Television  Corp., 
Tioga  St.,  Philadelphia,  Pa. — Radio 
Today. 


Dummy  antenna  resistor 

*  Vacuum-type  resistor  for  use 
in  constructing  dummy  antennas 
for  transmitters.  Unit  is  built  like 
a  vacuum  tube  and  has  a  4-prong 
base.  Resistance  constant  within  a 
very  few  per  cent  up  to  14  mega- 
cycles. Resistance  of  73  ohms, 
which  matches  concentric  and  twist- 
ed pair  feeders.  Model  D-100  Is 
rated  at  100  watts.  Units  may  be 
used  in  series  parallel  connections 
for  higher  ratings.  Ohmite  Mfg. 
Co.,  4835  Flournoy  St.,  Chicago, 
Til. — Radio  Today. 


Wire-wound  resistors 

*  Vitreous  -  enameled  resistors 
with  resistance  wire  having  low 
temperature  coefficient.  Fired  at  red 
heat — glossy  coating.  Soldering  lugs 
or  pig-tail  connections.  Available 
in  10  and  20  watt  ratings.  Pyrohm 
Jr.,  Aerovox  Corp.,  70  Washington 
St.,  Brooklyn,  N.  Y. — Radio  Today. 


Fadalette  receivers 

•  4-tube  AC-DC  T.R.F.  receiver 
tuning  545-1,650  KC.  Illuminated 
dial,  automatic  overload  control. 
Power  output  of  2  watts.  4-inch 
dynamic  speaker  unit.  Model 
5F50V  in  ivory,  list  $12.95.  In  wal- 
nut, $9.95.  Fada  Radio  &  Electric 
Co.,  30-20  Thomson  Ave.,  Long 
Island  City,  L.  I.,  N.  Y.— Radio  To- 
day. 


3-wire  antenna  connector 

*  Outlet  and  plug  for  connecting 
antenna  and  ground  systems  to 
radio  set.  3-circuits  provided  with 
polarized  plug  to  accommodate  all- 
wave  antenna  systems.  Mounts  on 
wall  or  baseboard.  Provides  neat, 
direct  connections  to  radio  set.  Type 
329— list  65  cents.  M.  M.  Fleron  & 
Son,  Inc.,  Trenton,  N.  J. — Radio 
Today. 


Oscilloscope 

■*■  Cathode-ray  oscilloscope  and 
frequency  modulator.  Frequency 
sweep  of  0-50  KC.  Vertical  and  hori- 
zontal amplifiers  for  use  up  to  100,- 
000  cycles.  Sweep  amplifier  auto- 
matically synchronized.  Sheet  metal 
case  in  crystalac.  Model  OFM-1. 
General  Electric  Co.,  1285  Boston 
Ave.,  Bridgeport,  Conn. — Radio  To- 
day. 


Switch  contact  cleaner 

*  Cleaner  for  radio  switch  con- 
tacts. Harmless  to  any  metal  sur- 
face. Removes  corrosion,  oxides, 
and  restores  switch  to  normal  ef- 
ficiency. Packaged  in  2  ounce 
bottles.  Nash  Radio  Products  Co., 
5437  Lisette  Ave.,  St.  Louis,  Mo. — 
Radio  Today'. 


Admiral   wireless   record 
players 

*  Portable  record  players  for 
use  with  any  type  of  radio  set.  Wire- 
less operation  does  away  with  need 
of  connections  to  radio  set.  Player 
is  connected  to  power  line  for  ope- 
ration and  radio  set  tuned  to  rec- 
ord player.  Model  AW-11  in  figured 
walnut  cabinet.  AR-10  in  metal 
case.  Contintental  Radio  &  Tele- 
vision Corp.,  3800  Cortlandt  St.,  Chi- 
cago,  111., — Radio   Today. 


Parasitic   suppressor 

*  Combination  inductive  and  re- 
sistive unit  for  suppressing  para- 
sitic oscillations  in  push-pull  and 
parallel  radio  frequency  amplifiers 
in  transmitters.  Units  are  con- 
nected in  the  grid  circuit.  Type 
507-622— list  $2.  Ward  Leonard 
Electric  Co.,  Mt.  Vernon,  N.  Y  — 
Radio  Today". 


Farm  radio  set 

*  Battery-type  radio  set  using 
1.4  volt  tubes  for  low  battery  drain. 
Push  button  tuning  for  4  stations. 
Superhet  circuit  with  automatic 
volume  control  and  4  tubes.  Mag- 
netite core  coils  for  permanent 
alignment.  Model  94BT-2  illustrat- 
ed. A  similar  set  in  same  cabinet 
for  6-volt  operation  is  designated  as 
the  96BT-6  and  it  can  be  adapted 
for  AC  operation  using  the  CV-9 
converter.  RCA  Mfg.  Co.,  Cooper 
St.,    Camden,    N.   J. — Radio    Today. 


J 


Interphone  and  paging  system 

■*  Master  type  two-way  inter- 
communicating system.  All  of  the 
outlying  stations  may  be  called  by 
using  the  master  switch.  Separate 
stations  are  called  by  using  the  in- 
dividual selector  switches.  Unit 
illustrated  is  for  10  stations.  Ad- 
ditional switches  may  be  used  to 
increase  the  capacity.  Call  switch 
may  be  used  on  outlying  stations. 
Model  190.  Operadio  Mfg.  Co.,  St. 
Charles,  111. — Radio  Today. 


Stromberg  record  player 

*  Cabinet  type  record  player 
with  crystal  type  pick-up.  Plays 
records  up  to  12  inches  at  78  r.p.m. 
May  be  attached  to  practically  any 
make  of  radio.  Equipped  with  7- 
ft.  power  supply  cord  and  20-ft. 
pick-up  cord.  Adjustable  automatic 
stop.  Plugs  into  phono  jack  of 
Stromberg-Carlson  receivers.  Strom- 
berg-Carlson  Telephone  &  Mfg.  Co., 
100  Carlson  Rd.,  Rochester,  N.  Y.— 
Radio  Today-. 


32 


Radio  Today 


Your  Arm  Can  Reach  Out  3000  Feet 
with  tfflMllto  REMOTE  CONTROL 


There  is  nothing  mysterious  about  Oper- 
adio  Remote  Control.  It  is  not  a  wireless. 
A  cord  from  the  amplifier  to  the  Remote 
Control  Unit  enables  you  to  control  vol- 
ume as  far  away  as  you  can  hear  it.  The 
Remote  Controlor  is  used  for  remote 
master  microphone  gain  control  and  the 


Remote  Mixtrolor  for  remote  mixing  of 
two  microphones. 

A  book  could  be  written  about  the  ad- 
vantages of  Remote  Control.  But  below 
is  a  word  picture  of  the  Remote  Con- 
trolor that  tells  the  story  better  than 
anything  we  could  write. 


You  buy  P.  A.  Equipment.  Why 
not  buy  Operadio  P.  A.  equipment 
so  you  yourself  can  have  the  ad- 
vantages of  this  outstanding  de- 
velopment? All  Operadio  equip- 
ment is  designed  to  use  the  Remote 
Control  feature.  It  has  proved 
practical,  workable.  Thousands  of 


dealers  say : ' '  Anyone  who  buys  an 
amplifier  without  Operadio  Re- 
mote Control  doesn't  know  what 
he  is  missing.  He  is  back  in  the 
'horse  and  buggy'  days  of 
P.  A."  See  your  jobber 
today,  or  address  Dept.  gZt] 
RT10. 


AH  Operadio  Systems  are  licensed  by  Electrical  Research  Prod 
ucts.  Inc.  under  U.  S.  patents  of  American  Telephone  and  Tele 
graph  Company  and  Western  Electric  Company,  Incorporated 


Manufacturers  of  a  complete  line  of  Public  Address  Equip- 
ment, Intercommunicating  Systems,  School  Sound  Sys- 
tems,   Public   Address   and  Radio   Replacement   Speakers 

EXPORT  DIVISION:  145  W.  45TH  STREET,  NEW  YORK    CITY 


OPERADIO  MANUFACTURING  COMPANY  ST,LLcZLsES 


"MAKE  IT  EASY"  FOR  PROSPECT  TO  UNDERSTAND 

Emphasize     convenience      in  selling  sound   jobs 
Show  how  extras  will  add  to  value  of  installation 


The  old  bromide  "To  sell  some- 
thing, you  must  yourself  thoroughly 
know  what  you  are  selling,"'  truly  fits 
sound-equipment  merchandising.  For 
today,  everyone  knows  and  realizes 
that  selling  sound  equipment  is  def- 
initely a  big  and  increasing  part  of 
the   radio  business. 

However,  sound  sales  are  often  lost 
or  placed  in  jeopardy  by  either  of  two 
situations;  (1)  The  soundman  is  talk- 
ing a  language  of  decibels  and  watts 
that  is  not  understood  in  the  least  by 
the  prospective  purchaser,  or  (2)  he 
does  not  answer  fully  the  questions  of 
the  prospect  concerning  the  equip- 
ment. 

The  average  person  can  differenti- 
ate between  a  microphone  and  a 
speaker,  but  still  has  a  pretty  hazy 
notion  of  just  what  transpires  between 
the  two  in  the  amplification  process. 

To  overcome  this  lack  of  under- 
standing is  perhaps  one  of  the  hard- 
est parts  of  a  sound  sale.  For  every- 
thing explained  may  be  electrically 
and  "radio-ly"  correct  and  clearly  un- 
derstandable by  another  radio  man, 
but  still  be  not  in' the  least  clear  to 
the  prospect. 


Suggest  additions 

Generally  speaking  the  first  require- 
ment of  the  sound  sale  is  to  survey 
the  situation  and  area,  and  to  decide 
just  what  is  absolutely  essential  as  a 
minimum,  and  what  items  may  be 
added  to  render  the  installation  com- 
plete. 

This  does  not  mean  that  one  should 
specify  six  speakers  where  four  would 
be  more  than  adequate,  but  that  the 
sound  man  should  suggest  additional 
features  that  may  be  useful  and  con- 
venient. 

Schools  have  opened  and  this  sea- 
son school  people  are  taking  more  and 
more  of  an  interest  in  sound  equip- 
ment. The  major  networks  have  laid 
out  programs  which  are  destined  to 
provide  a  most  complete  schedule  of 
activities  over  their  stations  aimed  for 
the  most  part  to  schools  and  educa- 
tion. 

Educators  have  fast  recognized  the 
advantages  of  sound  equipment  and  it 
is  said  today  that  any  school  of  more 
than  four  rooms  without  sound  am- 
plification, is  out  of  date  as  far  as 
educational  standards  is  concerned. 


jtpC3L 


B  3_ 


The  Mineola  (NY)  skating  rink  turned  out  to  be  a  PA  paradise.    Jensen  speakers 
were  staggered  on  roof-beams,  to  cover  up  to  1,200  guests.    Skating  music  supplied 
by  Hammond  organ  and  electric  Minipiano  is  recorded  on  Presto  recorder;  rec- 
ords sold  to  other  rinks.    Rack  by  Par-Metal,  mike  by  Astatic. 


But  to  get  back  to  recommendation 
of  sound  equipment,  a  case  is  cited 
herewith  which  better  explains  the 
specifications  of  sound  equipment. 

Profitable  extras 

The  soundman  made  a  preliminary 
survey  of  a  school  which  consisted  of 
eleven  rooms,  an  auditorium-gymnasi- 
um, and  in  addition  a  small  room 
called  a  "music  appreciation  room," 
which  was  used  by  the  music  depart- 
ment. The  teachers  in  this  grade 
school  felt  sound  equipment  would 
provide  an  exceptional  means  of  ad- 
ditional education  for  the  students. 

It  was  decided  to  install  speakers 
in  each  of  the  school  rooms,  enough 
speakers  in  the  gymnasium  for  ade- 
quate coverage,  which  was  two),  and 
also  another  speaker  in  the  music-ap- 
preciation room.  The  principal's 
office  was  selected  for  the  control  room 
and  "studio,"  of  the  entire  set-up. 

The  soundman  made  his  bid  for 
such  a  layout.  He  then  suggested 
additional  facilities,  which  were  also 
sold  to  the  instittition.  An  additional 
microphone  was  installed  in  the  mu- 
sic-appreciation room  for  the  origina- 
tion of  programs  by  the  music  class 
to  the  entire  school.  The  school 
boasted  a  fairly  good  orchestra  so  he 
sold  them  on  the  idea  of  a  contact 
microphone  for  the  guitar.  Also  an 
additional  microphone  was  incorpo- 
rated in  the  gymnasium  for  amplifica- 
tion. 

Stress  case 

This  incidentally  was  quite  an  ad- 
ditional amount  of  equipment  to  be 
installed  compared  with  the  original 
bid,  and  resulted  all  from  careful 
thought  and  recommendation.  The 
principal  remarked  afterwards,  that 
others  bidding  did  not  suggest  any 
such  ideas.  He  also  added,  after  the 
equipment  was  installed,  that  the  "ex- 
tras" could  have  hardly  been  done 
without. 

By  looking  for  and  pointing  out  ad- 
ditional items  to  be  incorporated  with 
any  sound  installation,  the  soundman 
places  himself  in  a  high  position  for 
the  extra  profits  from  such  extras. 
Even  in  the  event  the  installation 
would  only  comprise  a  setup  without 
the  extra  recommendations,  the  sound- 
man has  placed  in  the  minds  of  the 


34 


Radio  Today 


prospects,  the  need  for  the  additional 
accessories,  and  will  get  the  extra 
business  when  the  time  comes. 

In  explaining  an  amplifying  instal- 
lation, the  soundman  should  first  and 
foremost  stress  the  ease  of  operation. 
Showing  the  prospect  how  to  use  the 
equipment  and  then  letting  him  oper- 
ate the  controls,  will  dramatically 
carry  over  this  sales  point.  Depend- 
ability is  another  good  factor,  but  is 
secondary  to  the  ease  of  operating  the 
equipment. 

Explaining  that  all  equipment  will 
become  an  integral  part  of  the  build- 
ing as  does  the  electric-wiring  system 
or  heating  system,  provides  the  sta- 
bility argument  still  further. 

Generally  unless  the  prospect  has  a 
special  knowledge  of  radio  or  sound 
equipment,  it  is  best  to  leave  out  the 
decibel  and  wattage  angles  and  instead 
concentrate  on  area  coverage  and  au- 
dience covering.  This  can  still  be 
further  carried  out  by  explaining  that 
the  audience  will  always  have  a  maxi- 
mum coverage,  with  additional  power 
available  to  cover  any  additional  re- 
quirement. 

By  such  treatment  of  the  proposed 
installation,  the  prospect  envisions  the 
system  in  actual  working  operation 
and  can  further  understand  your 
point. 

Demonstrate  if  possible 

In  either  case  an  actual  demonstra- 
tion will  prove  more  than  weeks  of 
talking,  and  such  an  actual  installa- 
tion should,  when  feasible,  be  ar- 
ranged. If  possible  this  should  be 
held  in  conjunction  with  some  occa- 
sion when  there  is  a  large  assembly 
to  demonstrate  the  advantage  and  help 
a  sound  system  really  gives. 

A  prospect  who  has  accepted  such 
a  service  naturally  feels  obligated  and 
will   give  that   soundman  preference. 

In  sound,  as  in  every  line,  there  is 
always  cut-throat  competition,  alike 
in  sales  and  rentals.  Naturally,  such 
competitors  will  often  creep  into  the 
sound  bids.  However,  a  mention  of 
a  competitors  rarely  strengthens  your 
sales  position.  A  comparison  of  the 
value  you  offer  may  never  be  given  a 
thought  unless  you  suggest  it. 

Meeting  competition 

In  the  event  of  the  mention  of  a 
competitor  and  his  equipment  offered, 
definite  comparisons  will  swing  the 
sale  your  way.  In  the  same  way 
"knocking"  a  competitor's  product 
produces  the  opposite  effect  intended, 
for  the  prospect  usually  decides  to 
investigate  the  other  ■  equipment 
further. 


The  modern  sound  job  can  become  as  complete  as  the  imagination  and  resourceful- 
ness of  the  sound  salesman  permits.     A  hotel  installation  may  embody  many  aux- 
iliary services  including  radio. 


In  one  case,  Soundman  A  made  a 
bid  of  $475  for  type  X  equipment.  A 
competitor  offered  $395  for  Y  equip- 
ment. Now  both  of  the  two  brands 
offered  were  not  nationally  known.  So 
A  said  the' other  brand  was  "junk." 
The  customer,  however,  investigated 
the  T  equipment  and  told  A  he  had 
decided  on  it.  A  quickly  said  he 
would  supply  it  for  $360.  Thereupon 
the  customer  as  quickly  decided  to 
call  for  another  bid,  and  so  A  lost 
everything. 

Whereas  if  A  had  offered  an  honest 
comparison  of  the  two  brands  and 
suggested  that  he  recommended  X 
more  than  T,  hut  would   supply  the 


latter  at  the  lower  price,  he  would 
have  been  in  a  better  position. 

Sometimes  a  suggestion  that  imme- 
diate purchase  of  the  equipment  would 
be  most  desirable  in  the  prospect's 
case,  results  in  the  sale.  If  the  pros- 
pect is  familiar  with  the  equipment 
being  offered,  it  is  useless  to  offer  a 
big-winded  sales  argument,  but  in- 
stead the  sound  man  should  empha- 
size the  immediate  use  and  its  conse- 
quent savings  in  time  and  energy. 

Use  of  testimonials  in  selling  has 
its  weak  and  good  points.  Everyone 
who  sells  sound,  at  one  time  or  an- 
other takes  pictures  of  representative 
(Continued  on  page  48) 


FOURTEEN  POINTS  TO  REMEMBER 
WHEN  SELLING  A  SOUND  JOB 

1.  Use  simple,  non-technical  language — forget  watts  and  decibels. 

2.  Answer  fully  all  questions  the  prospect  asks. 

3.  Survey  the  area  and  indicate  a  "bare-essentials"  installation. 

4.  Show  also  what  extras  are  needed  to  make  it  a  complete  job. 

5.  Try  to  sell  the  "complete,  convenience  job." 

6.  List  extras  for  immediate  or  future  sale. 

7.  Stress  ease  and  convenience  of  operation. 

8.  Make  actual  demonstration  where  possible. 

9.  Let  prospect  himself  handle  controls. 

10.  Never  mention  competition,  if  prospect  doesn't. 

11.  Lay  off  knocking  competitors'  apparatus. 

12.  Turn  rentals  into  sales  when  you  can. 

1  3.     Pictures  of  past  jobs  are  better  than  letters. 

14.     When  job  is  operating,  call  occasionally  to  see  that  everything 
is  O.K. 


October,  1938 


35 


BROADENING  THE  SOUND  MARKET 

Industry  leaders  point  out  new  selling   oppor- 
tunities for  radio  men  to  handle  sound  locally 


From  a  check-up  made  by  Radio  Today  in  the  radio  trade, 
we  find  great  interest  right  now  in  the  trend  toward  diver- 
sifying products  handled. 

More  and  more,  radio  men  are  turning  to  sound-equip- 
ment sales  as  a  means  of  diversifying — and  so  stabilizing — 
their  own  businesses. 

Recent  developments  have  helped  to  swing  radio  men's 


attention   to   sound   sales,   as   a    way   to    collect   important 
dollar  volume  out  of  their  local  communities. 

To  confirm  our  own  observation,  the  Editors  have  in- 
vited from  leaders  in  the  sound  business  their  comments 
and  suggestions  on  this  move  of  the  radio  trade  to  take  on 
"sound."  A  number  of  these  comments  follow,  pointing 
out  how  local  sales  of  sound  equipment  can  be  increased. 


Surface  barely  scratched 

Peter  Jensen 
Jensen  Radio  Mfg.  Co.,  Chicago,  III. 

A  progressive  radio  dealer  can  sell 
sound  successfully  because:  He  has 
the  technical  staff;  he  has  a  radio 
parts  inventory  and  test  equipment  al- 
ready which  can  be  used  for  sound 
tests  and  servicing,  therefore  no  in- 
creased equipment  expense. 

A  dealer  can  add  to  his  revenue  by 
selling  sound  because:  The  peak  in 
sound  sales  occurs  when  radio  sales 
are  lowest;  practically  no  trade-ins; 
credit  of  customer  is  better;  no  sat- 
uration, surface  barely  scratched; 
many  present  installations  obsolete 
due  to  faulty  or  poor  equipment;  new 
uses  discovered  every  day. 

Sound  apparatus  is  more  closely  re- 
lated to  radio  than  any  other  kind  of 
electrical  appliances. 

A  dealer  should  use  the  best  mate- 
rial available  to  avoid  servicing  cost. 

In   strategic   position 

S.  N.  Shure 
Shure  Brothers,  Chicago,  III. 
The  radio  dealer  and  serviceman  are 
in  a  strategic  position  to  get  sound 
business.  Opportunities  for  sound 
sales  and  rentals  crop  up  at  every  turn 
for  the  actively  sound-minded  radio 
man.  We  believe  that  a  thorough 
study  of  the  latest  advances  in  direc- 
tional microphone  performance  and  in- 
telligent application  of  these  devices  in 
the  field  will  give  alert  technicians  a 
big  advantage  in  closing  sound  sales. 

Round'the-calendar  sales 

John  Erwood 
The  Webster  Co.,  Chicago,  III. 

Sound  equipment  and  its  use  in  the 
scheme  of  things  today  is  becoming  so 
important  that  it  is  difficult  to  imagine 
the  live  and  progressive  radio  dealer 
failing  to  take  advantage  of  the  op- 
portunities presented  therein. 

While  the  sound  equipment  field 
must  be  regarded  as  highly  specialized, 
it  is  this  factor  alone  that  makes  it 
more  attractive  to  the  more  progres- 
sive and  sales-minded  group  of  radio 
distributors   and    dealers. 

The  sound  equipment  field  should 
not  be  regarded  as  a  seasonable  busi- 
ness.    Its  many  ramifications  present 


such  a  variety  of  applications  that  the 
dealer  can  practically  write  his  own 
ticket.  Industrial  and  school  sales 
possibilities  present  almost  around-the- 
calendar  opportunities  for  their  specif- 
ic types  of  equipment.  In  addition 
thereto,  we  have  a  widely  changing 
variety  of  social  activities  throughout 
the  year  that  offer  an  exceedingly 
large  number  of  sales  possibilities. 

Sound  equipment  must  be  sold  and 
because  the  unit  sale  and  consequently 
the  profit  is  large,  this  activity  most 
certainly  justifies   the   required  effort. 

Demonstrate  to  sell 

S.    RUTTENBERG 

Amperite  Co.,  New  York 
The  fundamental  principle  in  suc- 
cessfully selling  sound  is  simple — by 
good  demonstration.  Investment  re- 
quired to  enable  good  demonstration  is 
low.  With  a  little  study,  proper  expe- 
rience can  be  gained  in  a  short  time. 
A  successful  demonstration  will  sell — 
even  at  a  higher  price.  Sound  is  used 
for  commercial  purposes.  Natural  re- 
production, reliability,  ruggedness  and 
service  are  most  important — price  next 
important. 

Get  out  after  business 

Henry  G.  Kobick 
Webster  Electric  Co.,  Racine,  Wis. 

The  sale  of  Sound  differs  in  no  re- 
spect with  any  other  piece  of  mer- 
chandise. It  is  true  that  there  are 
some  approaches  on  the  technical 
side  which  differ  slightly  from  the 
conventional  run  of  merchandise,  but 
the  important  point  is  that  it  needs 
the  constant  application  to  getting  out 
after  business  that  any  other  piece  of 
equipment  requires. 

Daily,  new  uses  are  being  found  for 
Sound  and  an  increasing  number  of 
dealers  other  than  radio  dealers  are 
inquiring  into  the  possibilities  of  the 
field.  Yet  the  radio  dealer  is  still  the 
logical  outlet  for  Sound  equipment, 
provided  this  dealer  makes  up  his 
mind  that  he  must  sell  it  in  the  same 
manner  that  he  sells  any  other  piece 
of  merchandise   in  his  stock. 

There  is  a  tendency  toward  buying 
better  equipment,  which  is  another 
indication  that  Sound  is  here  to  stay. 


Prospects  everywhere 

H.  A.  Wilson 
Operadio  Mfg.   Co.,  St.   Charles,  III. 

Public  address — intercommunication 
— industrial  and  commercial  sound — 
school  sound  distribution! — All  are 
lucrative  fields  for  the  radio  dealer  or 
serviceman  who  is  alert  and  anxious  to 
increase  sales  by  diverting  activities 
and  the  addition  of  lines  that  have  a 
distinct  high  unit  sales  value. 

Prospects  are  everywhere.  Investi- 
gation will  prove  that  Sound  in  its 
many  variations  spells  profits- 


Start  on  small  jobs 

John  Meck 
Vocograph  Sound  Systems, 
Chicago,  III. 
Look  for  sound  sales  right  under 
your  nose.  Start  on  small  ones  that 
the  sound  specialist  doesn't  bother 
with.  Hundreds  are  in  every  com- 
munity; some  even  in  your  own  block. 
Locate  one  today  and  ask  your  parts 
jobber  to  cooperate  in  a  demonstra- 
tion. That's  how  you  start  on  the  road 
to  sound  profits.  No  investment — just 
cash  in  a  quick  sale  to  your  own 
present  customers.  Best  October  and 
November  prospects  are  churches, 
undertakers,  cafes,  lodges. 

Radio  man  knows  focal  field 

H.  L.  Shortt 
Transformer  Corp.  of  America, 
New  York  City 
The  radio-set  dealer  is  in  a  decidedly 
advantageous  position  as  compared  to 
the  present  types  of  outlets  selling 
sound  equipment.  This  is  easily  seen 
when  you  consider  that  "contact"  is 
the  most  vital  aspect  of  sound  sales 
promotion.  In  fact,  the  strongest  ar- 
gument presented  by  present  outlets 
against  any  type  of  sound  sales  promo- 
tion program  instituted  by  a  manufac- 
turer is  that — "It  requires  too  much 
time  and  money  to  cover  his  vast  ter- 
ritory  considering  the  relatively  few 
potential  sound  equipment  outlets.  He 
would  rather  sell  parts."  This  state- 
is  true  enough  when  you  consider  that 
in  many   cases  one  outlet  will  try  to 

(Continued  on  page  52) 


36 


Radio  Today 


ftWMtf:{«KI 


/. 


THEM? 


You  need  planned  sales  help  to  sell 

tubes— and  here's  what  RCA 

does  to  help  you  I 

1.  Current  "Money  Back"  promotion 

2.  Consumer  advertising 

3.  Window  display  service* 

4.  Sales  helps  for  use  in  your  store 
Full  details  from  your  distributor. 

Over  32  5  million  RCA  radio  tubes  have  been  purchased  by  radio  users 
...  in  tubes,  as  in  radio  sets,  it  pays  to  go  RCA  ALL  THE  WAY. 

RCA  presents  the  Aiagic  Key  every  Sunday,  2  to  3  P.  M.,  E.  S.  7.,  on  the 
NBC  Blue  Network. 


*New  Fall  Display 
Ready 

The  attractive  football  dis- 
play shown  here  is  now 
available  for  use  in  your 
window.  Timely,  colorful, 
and  informative,  it  will 
stop  people  at  your  store. 
Ask  your  RCA  distributor 
how  you  can  get  this  dis- 
play for  your  own  use. 


GUARANTEED 
BY 

RCA 

(WRITTEN  GUARANTEE  INSIDE) 


RADI 


SEALED  and  TESTED 
at  the   factory   for 


YOUR  PROTECTION 


I 


SOUND   FAR   HOTELS 


Special   problems  that  must  be 
solved   in   centralized    systems 


While  few  branches  of  sound  work 
compare  with  the  hotel  field  in  point 
of  profit,  none,  probably,  presents  as 
many  unusual  difficulties,  or  is  as  ex- 
acting in  its  requirements.  The  appar- 
ently attractive  profit  can  easily  turn 
into  a  substantial  loss  before  the  cus- 
tomer's demands  are  met  to  his  satis- 
faction, unless  the  original  estimate 
has  been  very  carefully  based  on  the 
peculiar  necessities  of  hotel  operation. 

Hotel  managers  face  a  number  of 
operating  problems  unlike  those  of  any 
other  business,  and  must  therefore  im- 
pose special  demands  on  the  public 
address,  system.  The  question  of  help, 
for  example,  is  extremely  difficult  in 
hotel  routine.  They  do  a  great  part  of 
their  work  in  the  sight  of  the  custom- 
ers, and  that  in  a  place  which  strives 
above  all  things  to  present  an  at- 
mosphere of  ease  and  restfulness.  Con- 
sequently, the  most  complicated  serv- 
ices must  be  performed  without  seem- 
ing, effort.       -  r 

Automatic  operation 

Everything  proceeds  as  if  by  magic. 
The  hotel  man  merely  wants  his  sound 
system  to  work  the  same  way.  Control 
operators,  if  any,  must  be  out  of  sight; 
he  greatly  prefers  to  have  none,  and 
often  demands  equipment  designed  ac- 
cordingly. All  the  hotel  manager 
wants  is  perfect  results,  under  the 
most  complicated  and  difficult  condi- 
tions, delivered  automatically.  He  is 
willing  to  pay  for  what  he  wants. 

A  second  factor  in  the  hotel  man's 
dislike  for  manual  control,  and  a  very 


important  one,  lies  in  the  enormous 
variety  of  apparatus  he  uses  in  his 
business.  It  is  impossible  for  him  to 
burden  his  payroll  with  a  specialist 
for  every  different  kind  of  machinery 
and  appliance — and  the  p. a.  system  is 
merely  one  among  many  dozens  of  ap- 
pliances. He  naturally  wants  his  house 
electrician  to  maintain  it,  and  opera- 
tion to  take  care  of  itself. 

At  the  same  time  perfect  service,  in 
accordance  with  the  hotel's  standards 
of  performance,  is  demanded  as  a  mat- 
ter of  course. 

How  these  requirements  are  met  in 
practice  will  he  indicated  in  the  course 
of  some  examples  cited  below. 

Performance  standards 

In  one  of  the  hotel  systems  to  be 
described,  for  instance,  the  loud  speak- 
ers and  the  microphone  are  in  the 
same  dining  room,  the  room  is  lined 
with  mirrors,  some  of  the  artists  in- 
sisted on  cuddling  the  microphone 
while  others  maintained  a  more  than  re- 
spectful distance.  Under  these  condi- 
tions the  management  imperatively  re- 
quired that  there  be  no  control  op- 
erator, no  pick-up  of  room  noise,  no 
feedback  of  course,  and  never  the  least 
trace  of  improper  volume  at  any  table, 
under  any  conditions  of  attendance. 
Except  for  one  slight  compromise, 
which  the  management  accepted,  these 
requirements    were   met   completely. 

Before  going  into  details,  however, 
it  will  be  desirable  to  sketch  some 
general  difficulties,  those  that  are  met 
with  in  almost  every  installation.   The 


At  the  Terrace  Room  at  the  Hotel  New  Yorker,  the  sound  system  is  often  operated 
during  broadcasts  from  that  location.     Picture  shows' bandstand;  Amperite  mike. 


demand  for  fully  automatic  operation, 
to  take  that  factor  first,  possesses  the 
interesting  problem  of  a  high-power, 
high-voltage  system  which  headwaiters 
and  similarly  unskilled  persons 
switch  on  and  off.  Some  hotels  prefer 
to  eliminate  even  that  much  human  in- 
tervention in  favor  of  time  clocks.  The 
house  electrician  who  takes  care  of 
maintenance  is  likely  to  think  a  deci- 
bel is  something  that  has  a  clapper 
and  is  worked  by  an  electromagnet. 
Yet  breakdowns  are  unforgiveable. 

The  common  answer  to  the  head- 
waiter-time  clock  difficulty  Is  installa- 
tion of  time-delay  relays  which  give 
large  tubes  a  chance  to  heat  up  before 
plate  voltage  is  applied.  The  mainte- 
nance problem  is  met  by  using  double- 
channel  systems  throughout. 

Long  wire  runs 

Another  headache  of  hotel  work  is 
the  strong  chance  of  extraneous  pickup 
in  the  long  wire  runs  that  are  almost 
universally  required.  This  applies 
even  to  the  speaker  wiring,  when  sev- 
eral different  programs  are  piped 
through  the  same  conduit  to  individual 
room  speakers.  Cross-talk  under  such 
conditions  is  far  from  unknown,  and 
may  be  encountered  even  when  lead- 
covered  pairs  are  run  inside  the  con- 
duit. A  specially-designed  cable  has 
been  successfully  used  that  permitted 
simultaneous  operation  of  as  many  as 
ten  circuits,  each  at  plus  45  level,  but 
this  cable  is  not  universally  available, 
and  with  ordinary  materials  the  sound 
man  should  use  extreme  conservatism 
in  estimating  what  can  be  done  with 
multiple  loud  speaker  circuits  operat- 
ing in  the  same  run  of  conduit. 

The  long  pipe  runs,  which  add  so 
much  to  the  cost  of  a  hotel  installa- 
tion, and  consequently  to  the  size  of  a 
profit  figured  on  even  a  very  small  per- 
centage, must  never  be  skimped  to 
meet  competition.  It  is  better  to  lose 
the   contract. 

The  microphone  run  presents  a  \ery 
spec.ial  problem.  For  one  thing,  the 
amplifier  rack  is  practically  always  in 
a  remote  location,  yet  pre-amplifiers 
can  seldom  be  used  at  the  bandstand. 
There  are  several  reasons  for  this: 
One  is  that  breakdowns  must  never 
happen.  Consequently,  if  pre-amps  are 
used  they  must  be  supplied  in  dupli- 
cate, with  provisions  for  instantaneous 
changeover.  But  operating  the  emer- 
gency switch  is  the  responsibility  of 
the  house  electrician's  staff,  not  of  the 
band  leader,  and  the  house  electrician 
is  not  wanted  on  the  bandstand.  An- 


38 


Radio  Today 


Volume  can  be  adjusted  individually  at  the  speakers  when  controls  are  placed  at 
the  speaker.     Diagram  shows  connections  for  "T"  pads. 


other  objection  to  placing  pre-amplifi- 
ers  in  that  location  is  the  scarcity  of 
concealed  space.  A  third  lies  in  the 
fact  that  many  hotels  (at  least  in  the 
larger  Eastern  cities)  have  d.c.  only 
at  the  bandstand  and  vicinity,  with 
any  number  of  fans,  motors  and  mis- 
cellaneous machines  on  the  same  cir- 
cuit. Under  these  circumstances,  a  low 
impedance  microphone  is  the  only 
choice. 

The  acoustic  and  operating  problem 
of  the  dining  room  with  mirrors,  re- 
ferred to  above,  was  solved  very 
largely  through  the  use  of  a  velocity 
microphone.  The  place  is  the  Glass 
Hat,  at  the  Belmont  Plaza  Hotel  in 
New  York.  It  can  never  be  acoustic- 
ally treated  until  the  management  is 
willing  to  change  its  individual  char- 
acter. A  directional  velocity  micro- 
phone of  excellent  quality,  set  at  a 
sharp,  nearly  horizontal  angle,  proved 
to  be  an  almost  magical  cure-all.  One 
factor  it  could  not  cure,  namely,  vari- 
ation in  volume  with  different  condi- 
tions of  attendance.  On  this  point 
the  management  compromised;  they 
agreed  that  the  remote  loud  speakers 
might  be  equipped  with  switches  and 
volume  controls  operated  by  the  waiters. 

P.  A.  and  broadcast  pickup 

An  exceptional  radio  problem  arose 
at  the  Terrace  Room  of  the  Hotel  New 
Yorker,  where  entertainment  is  both 
reinforced  for  the  benefit  of  the  pa- 
trons and  transmitted  via  telephone 
line  for  broadcasting.  The  pickup  of 
loud  speaker  sound,  although  not 
strong  enough  to  produce  feedback, 
created  an  echo  in  the  broadcast  pro- 
gram. The  radio  interests  asked  to 
lave  the  sound  system  cut  off  while 
the  Terrace  Room  was  on  the  air,  but 
the  management  refused  on  the  ground 
that  anyone  who  paid  Terrace  Room 
cover  charges  was  entitled  to  hear  the 
show.  Sharply  directional  micro- 
phones, coupled  with  some  reduction 
in  volume,  achieved  a  partial  remedy. 
Complete  elimination  of  the  echo  was 
not  attained,  however,  until  a  special 
acoustic  treatment  had  been  worked 
out  and  applied. 


The  coffee  room  of  the  same  hotel 
presented  a  problem  that  compelled 
development  of  one  of  the  first  of  in- 
finite baffles.  The  nature  of  the  walls 
and  decorative  scheme  are  such  that 
only  the  thin  partition  marking  off 
the  kitchen  could  be  used  to  mount  the 
loud  speakers.  The  management  de- 
manded that  no  part  of  the  speaker 
back-wave,  no  sound  at  all,  should  be 
audible  in  the  kitchen,  for  fear  that 
orders  called  in  by  the  waiters  might 
not  be  correctly  heard.  Infinite  baffles, 
each  carrying  two  woofers  and  a 
tweeter,  provided  a  solution  so  com- 
plete that  the  kitchen  staff  cannot  even 
tell  whether  the  sound  system  is  on 
or  off. 

The  demand  for  automatic  or  nearly 
automatic  operation,  already  men- 
tioned, can  hardly  be  overstressed. 
Mixers,  when  used,  are  commonly  pre- 
set, even  in  those  cases  which  make 
it  necessary  for  the  artists  to  adjust 
volume  themselves  by  changing  their 
distance  from  the  microphone.  Micro- 
phone    huggers    are    sometimes     con- 


trolled by  surrounding  the  mike  stand 
with  an  ornamental  metal  ring,  which 
some  manufacturers  provide  for  that 
purpose. 

Hotel  amplifiers  should  always  have 
ample  reserve  power.  Two-channel 
systems  are  practically  mandatory  in 
any  hotel  of  importance.  The  time- 
delay  relays  often  used  in  the  larger 
amplifiers  have  already  been  men- 
tioned. 

Speaker  equipment 

Loud  speakers  are  usually  equipped 
with  directional  baffles,  for  obvious 
reasons,  and  are  always  of  the  perma- 
nent magnet  type  to  minimize  wiring 
and  avoid  power  supply  problems.  In- 
dividual speakers  are  often  provided 
with  volume  controls  that  modify  their 
impedance  over  a  short  range;  these 
are  generally  pre-set  and  control  acous- 
tic feedback  only.  Volume  controls 
may  also  be  used  on  individual  speaker 
units  to  compensate  for  variations  in 
attendance  or  seating.  Occasionally 
speakers  are  switched  on  or  off  for 
that  purpose.  Such  speaker  switches 
may  be  wired  to  dummy  load  resistors 
which  substitute  an  equal  impedance 
in  the  speaker  line,  while  individual 
controls  may  be  of  the  constant-impe- 
dance pad  type. 

However,  when  there  are  a  great 
many  speakers  on  a  single  line,  as  is 
often  the  case  in  hotel  installations, 
the  switches  or  volume  controls  asso- 
ciated with  a  few  of  them  cannot  upset 
the  overall  line  impedance  in  any  im- 
portant degree.  Under  those  circum- 
stances the  dummy  load  resistors  may 
safely  be  omitted,  while  ordinary  po- 
tentiometers can  be  substituted  for  the 
more  expensive  pads.  This  is  particu- 
larly true  where  the  amplifier  has 
enough  undistorted  reserve  volume  to 
make  good  any  reasonable  loss  through 
mismatching. 


The  glass-walled  Glass  Hat  at  the  Belmont  Plaza  presented  extreme   acoustic 

difficulties   which  were  overcome   by  velocity  microphones.     The  speaker  units 

with  directional  baffles  are  concealed  behind  grilles  in  the  walls. 


October,  1938 


39 


3N  THE  OLD  DAYS,  the  grandfather 
of  today's  voter  got  his  political  facts 
from  the  rumor  experts  around  the  cracker 
barrel  in  the  village  store.  Authoritative,  non- 
partisan sources  of  information  were  hard  to 
find.  Never  could  grandfather  push  a  button 
and  tune  in  a  radio  discussion  of  both  sides  of 
a  political  issue . . .  local  or  national.  Probably 
grandfather  never  heard  a  President  speak.  He 
never  listened  to  an  English  King  or  a  French 
Minister.  Foreign  issues  and  even  most  na- 
tional issues  were  a  closed  book  to  many 
before  the  days  of  radio. 


What  the  American  System  of  Radio 
has  done  for  Voters  today 

Today  every  man  in  the  radio  business  from 
engineer  to  dealer  can  take  a  bow  for  his  share 
in  performing  a  real  public  service  for  all 
America.  Now  the  Nebraska  farmer  and  the 
old  lady  in  California  have  the  opportunity  to 
be  as  close  to  national  and  international  affairs 
as  the  alert  resident  of  Washington.  By  re- 
porting events  impartially  as  they  happen  .  .  . 
by  presenting  both  sides  of  every  national  or 
local  issue .  .  .  radio  helps  improve  the  nation. 


ADIO     BRINGS     OUT     THE     VOTES...  BY     BRINGING     OUT     THE     FACTS 


/  i 


;;.-.-.# 


;    *i 


Broadcasters  present 

All  the  arguments  of 

All  the  Candidates  to 

All  the  Nation! 

In  the  Presidential  election  of 
1920only25Personsineachhun- 

dred  voted,  although  about .60 
in  each  hundred  were  eligible. 
In  1936,  the  percentage  of  ac- 
tive voters  jumped  to  36  out  of 

each  one  hundred.  Authorities 
this  gain...  so  important 
t0the  welfare  of  the  nation... 
was  to  a  great  degree  due  to  the 
complete  information  which  ra- 
dio brings  to  the  public. 


^1 


RADIO  CORPORATION  OF 

RADIO  CITY 

RCA  MANUFACTURING  CO.,  INC.   •   RADIOMARINE  CORPORATION  OF  AMERICA 

NATIONAL  BROADCASTING  COMPANY 


40 


Radio  Today 


■a  r 


_3LC 


3z: 


3d 


:33n 


3C 


:3x: 


^azc: 


:3d: 


3ie: 


^  C         13 


Thanks  to  radio,  the  American  democracy 
has  the  opportunity  to  function  better  than 
ever  before  in  history.  Radio  keeps  voters  in- 
formed ...  on  their  toes.  And  greatest  of  all 
...  it  gives  them  the  opportunity  to  form 
intelligent  opinions  based  on  unbiased  facts. 
The  National  Broadcasting  Company,  one 
member  of  the  great  radio  family  of  RCA, 
has  always  performed  an  outstanding  service 
in  this  respect.  Last  year  there  were  821  mi- 
crophone appearances  of  prominent  statesmen 
over  NBC  Networks.  This  year,  the  facili- 
ties of  all  154  NBC  Stations  are  again  avail- 
able to  leading  candidates. 

By  Radio  Merchants  Developing  Radio  on 

a  basis  of  public  service. . .  RCA  Develops 

Opportunities  for  Dealers 

Since  its  inception,  the  Radio  Corporation  of 
America  has  played  a  most  important  part  in 
originating  and  developing  new  services  in 
radio.  Much  that  makes  radio  the  most  vital 
and  interesting  force  in  American  life  today 
is  "RCA  All  the  Way."  The  public  recog- 
nizes RCA's  contributions  .  .  .  the  public 
realizes  the  benefits  they  receive  by  going 
"RCA  All  the  Way."  As  a  result,  year  in 
and  year  out,  there  is  a  rich  field  of  oppor- 
tunity for  RCA  Victor  merchants. 

•       •       • 

RCA  presents  the  Magic  Key  every  Sunday,  2  to  3 

P.M.,  E.S.T.,  on  the  NBC  Blue  Network 


AMERICA 

NEW  YORK 

RCA  COMMUNICATIONS,  INC. 
RCA  INSTITUTES,  INC. 


WORLD'S   FIRST   POLITICAL   BROADCAST 
NOVEMBER  2,  1920 


This  photo  shows  scene  during  1920.  Second  from  right  is  the 
world's  first  pre-scheduled  radio  announcer  in  front  of  micro- 
broadcast,  when  station  KDKA  phone  which  resembles  primitive 
in  Pittsburgh  sent  out  Harding  telephone  transmitter.  KDKA  is 
Presidential   election   returns   in  now  an  outstanding  NBC  station. 


October,  1938 


-YJi 


41 


em 


ACOUSTICS  FOR  SOUND  JOBS 

Practical  tips  on    acoustical  treatment    which  will 
help  the  sound  man  improve  his  P.  A.    installations 


It  sometimes  happens  that  the  P.  A. 
man,  after  installing  even  the  best 
sound  equipment  he  can  obtain,  is  dis- 
appointed with  the  results  produced  by 
the  actual  working  installation.  The 
reinforced  speech  sounds  muffled,  con- 
flicting echoes  occur,  and  the  cus- 
tomer complains  about  the  perform- 
ance of  the  whole  job. 

Yet  such  deficiencies  in  the  actual 
installation  are  usually  due  not  to  any 
fault  in  the  sound  amplifying  or  re- 
producing apparatus,  but  to  the  ab- 
sence of  proper  acoustical  treatment 
of  the  interior  in  which  the  installa- 
tion is  operating.  Such  faults  can  in 
most  cases  be  easily  corrected  by  ap- 
plying simple  acoustical  principles  to 
the  job,  in  the  form  of  acoustical  treat- 
ment of  the  wall  surfaces  which  pro- 
duce reflections  of  the  sound  waves  as 
they  issue  from  the  loudspeaker. 

"Aiding  hearing" 

Acoustics  constitute  the  main  "bug- 
aboo" of  all  P.  A.  salesmen  and  deal- 
ers. It  is  probable  that  the  word  it- 
self contributes  more  toward  this  feel- 
ing than  the  actual  meaning  that  lies 
behind  it.  As  a  matter  of  fact,  the 
science  of  acoustics  is  comparatively 
simple  and  very  easy  to  understand. 
"Webster's  Dictionary  gives  the  follow- 
ing definition  for  the  word  "acoustics": 

"Pertaining  to  the  act  or  sense  of 

hearing  .  .  .  adapted  for  conveying 

sound  or  aiding  hearing." 
Therefore,  it  is  easy  to  visualize  that 


Fig.  1 — When  the  radius  of  ceiling 
curvature  is  less  than  half  the  height 
of  room   echoes  are   not   troublesome. 

the  word  acoustics  covers  a  wide  but 
well-defined  field.  Any  material  or 
anything  that  contributes  to  ease  in 
hearing  becomes  an  acoustical  aid  or 
an  acoustical  material.  With  this  ex- 
planation in  mind,  it  becomes  com- 
paratively easy  to  discuss  the  practical 
side  of  acoustics,  particularly  as  it  ap- 
plies to  the  sound  industry. 

Reflection  of  sound  waves 

There  are  only  two  more  terms  that 
should  be  defined  or  explained  before 
progressing  to  the  practical  side  of  the 
question.  Every  salesman  of  equip- 
ment has  encountered  the  term  "rever- 


, 

r^    "^ 

. 



^r— -^ 

X 

\ 

\  ; 

©  \ 

\                           H  =  CEIL 
\                  R=  RADIUS  OF 

X 

FLOOR 

LINE       _ 

ING  HEIGHT 
■  CEILING  CURVA1 

URE 

® 

Fig.  2 — When  the  radius  of  curvature  is  greater  than  the  height  as  in  A,  echoes 
are  not  serious.    In  B,  when  the  radius  is  equal  to  the  height,  echoes  are  focussed 

on  the  audience. 


beration"  either  when  reading  litera- 
ture on  the  subject  or  when  talking  to 
a  potential  prospect.  The  term  is  most 
frequently  used  when  describing  a 
poor  acoustical  condition  that  exists 
in  a  room.  The  term  "excessive  re- 
verberation" means  the  spoken  word, 
or  music,  is  being  reflected  back  and 
forth  between  the  walls,  ceiling  and 
floor  many  times  before  the  word  dies 
away  to  inaudibility. 

Described  in  another  way,  this  con- 
dition could  be  called  "excessive  re- 
flection" rather  than  "excessive  rever- 
beration." It  then  becomes  more  easy 
to  visualize  the  fact  that  words  can 
be  reflected  back  and  forth  between 
parallel  walls  so  many  times  that  the 
next  few  words  emanating  from  the 
loudspeaker  meet  the  reflected  words 
and  become  mixed  with  them.  Thus 
the  listeners  who  sit  at  the  rear  of  the 
auditorium  are  unable  to  distinguish 
one  word  from  another.  They  hear 
only  a  lot  of  noise:  This  is  the  result 
of  excessive  reverberation,  or  excessive 
reflections. 


How  echoes  occur 

When  a  reflected  sound  from  a  dis- 
tant wall  or  ceiling  arrives  at  the  ear 
about  one-tenth  of  a  second  after  the 
direct  sound  arrives  from  the  loud- 
speaker, the  ear  hears  a  distinct  echo. 
Both  reverberation  and  echo  are  re- 
flected sounds.  In  the  case  of  rever- 
beration, the  reflections  are  usually  so 
fast  and  so  close  together  that  a  blur- 
ring of  the  words  or  music  is  the  re- 
sult. In  the  case  of  echo,  the  reflec- 
tion takes  a  longer  time  interval 
because  of  the  distance  involved  and 
it  is,  therefore,  distinctly  heard  as  a 
repetition  of  the  original  sound. 
Echoes  are  usually  caused  by  curved 
ceilings  or  curved  walls  located  at  an 
appreciable  distance  from  the  listener. 
If  the  radius  of  curvature  of  a  ceiling 
is  less  than  half  the  ceiling  height, 
the  echo  will  not  be  troublesome  (see 
Fig.  1).  Likewise,  if  the  radius  of 
curvature  exceeds  twice  the  ceiling 
height,  as  indicated  in  Fig.  2-A,  the 
echo  will  not  be  troublesome.  Should 
the  radius  of  curvature  lie  between 
these  two  limits  so  as  to  focus  the  re- 
flected sounds  near  the  floor  or  near 
the  ears  of  the  audience,  as  illustrated 
in  Fig.  2-B,  a  bad  condition  will  exist. 

Excessive  reverberation  or  reflec- 
tions are  comparatively  easy  to  cor- 
rect. The  cure  consists  of  treating  the 
walls  with  soft  porous  material  that 
will  absorb  the  sound  instead  of  re- 
flecting it.  While  ceilings  also  are  fre- 
quently treated,  usually  the  walls  are 


42 


Radio  Todayi 


ai  ■  ■ 


Fig.  4 — Sound  absorbing  material  should  be  placed  on  the  rear  wall  first    and 
the  balance  on  the  sides  at  the  rear. 


the  main  offenders.  It  so  happens, 
however,  that  rooms  with  heavily  up- 
holstered seats,  carpets  in  the  aisles, 
or  a  considerable  amount  of  draperies 
will  usually  have  a  good  acoustical 
condition  and  practically  no  reflections 
to  speak  of. 

Men  selling  sound  systems  should 
note  the  conditions  in  the  room  that 
constitute  good  or  bad  acoustical  con- 
ditions from  the  standpoint  of  sound 
reflection.  A  few  of  these  items  to  look 
for  are  listed  below. 

Bad  conditions 

No  carpets 

Wood  seats 

No  draperies 

Curved  ceiling 

Curved   rear  wall 

No  acoustical  materials 
Good   conditions 

Carpets   (lined  with  Ozite 
particularly) 

Upholstered  seats 

Draperies 

Rectangular  shape   room 

Acoustical  materials 
If  upon  inspection  of  the  room  it  is 
observed  that  carpets,  heavily  uphol- 
stered seats  and  draperies  are  present, 
the  salesman  can  usually  proceed  with 
confidence  and  sell  his  sound  system 
with  assurance  of  fairly  good  results. 
He  can  further  demonstrate  by  talk- 
ing in  a  loud  voice  in  the  room  and  if 
he  notices  that  his  words  die  away 
quickly  and  do  not  bounce  around  in 
the  room,  then  he  has  had  the  good 
fortune  of  encountering  a  room  with 
good  acoustics. 

These  same  observations  can  he 
made  in  auditoriums,  lecture  halls, 
music  rooms,  gymnasiums,  restaurants 
and,  in  fact,  any  place  that  is  prospec- 
tive for  the  sale  of  a  P.  A.  system.  If, 
on  the  other  hand  the  floors  are  con- 
crete with  no  carpets  and  the  seats 
are  wood,  or  possibly  covered  with 
very  thin  leather  behind  which  there 
is  practically  no  padding,  and  the 
walls  are  bare  of  any  acoustical  ma- 
terials or  draperies,  you  may  be  rea- 
sonably sure  that  complaints  with  re- 
gard to  the  poor  acoustical  conditions 
will  arise  after  the  installation  of  the 
sound  system. 

In  the  latter  case,  it  is  necessary  to 
recognize  in  advance  the  poor  condi- 
tions   and    to    be   able    to    recommend 


the  proper  steps  necessary  to  correct 
those  conditions.  Fig.  3  has  been  de- 
veloped from  the  formula  that  follows: 
Units  of  sound  absorption  needed 
equals  .3Vv=.  Thus  the  formula  may 
be  neglected  and  the  amount  of  sound 
absorption  needed  can  be  determined 
by  the  use  of  Fig.  3.  First  determine 
the  volume  of  the  room  in  cubic  feet, 
read  vertically  to  the  curve,  then  hori- 
zontally, to  determine  the  number  of 
sound  absorbing  units.  This  curve 
is  predicated  on  a  bare  room  with 
wood  seats  and  no  carpets.  Should 
any  of  the  following  materials  be  pres- 
ent in  the  room  the  amount  of  absorp- 
tion that  they  introduce  can  he  de- 
ducted from  the  total  units  obtained 
from  the  chart. 
Material  Units  of  absorption 

Wood  seats 0.25  each 

Leatherette  seats.  1.60  each 
Fabric  uphol- 
stered seats. ...  2.6  =  3.0  each 

Draperies 0.12  to  0.30  per  sq.  ft. 

Carpets  (lined)..  0.25  average  per  sq.ft. 

Hair  felt  1  in 0.69  per  sq.  ft. 

Rock  wool  1  in 0.83  per  sq.  ft. 

Insulating  board 

%in 0.33  per  sq.ft. 

If  the  auditorium  in  question  is  100,- 
000  cubic  feet,  approximately  630  units 
of  absorption  will  be  needed.  If  there 
are  two  hundred  leatherette  seats  in 
the  room  with  absorption  of  1.60  units 


each,  the  seats  will  contribute  a  total 
of  320  units,  which  should  be  deducted 
from  the  630  needed.  Thus  a  total  of 
310  units  must  still  be  added  to  the 
room  by  means  of  draperies,  rock  wool 
blanket,  hair  felt,  or  other  .types  of 
acoustical  materials.  Select  the  ma- 
terial that  can  be  obtained  locally  and 
learn  its  sound  absorption  efficiency 
from  the  dealer  and  divide  the  number 
of  units  needed  by  the  material's 
sound  absorbing  efficiency  in  order  to 
determine  the  total  square  footage 
that  must  be  ordered.  If  310  addi- 
tional units  are  needed  and  rock  wool 
can  be  obtained  locally  in  1  in.  thick- 
ness, total  square  footage  that  should 
be  ordered  equals  310  divided  by  .83, 
or  374  sq.  ft. 

Installing  acoustic  material 

The  material  should  be  installed 
first  on  the  rear  wall.  Sound  systems 
are  directional  and  are  usually  pointed 
toward  the  rear  wall,  or  toward  the 
edge  of  the  balcony  if  the  balcony 
exists.  The  main  reflections  will,  there- 
fore, come  from  the  rear  wall  and  this 
area  should  be  the  first  to  which  sound 
absorbing  materials  are  applied.  If 
materials  are  left  over  after  applica- 
tion on  the  rear  wall,  the  balance 
should  be  installed  on  the  side  walls, 
starting  at  the  rear  of  the  house  and 
working  forward.  This  particularly 
applies  to  auditoriums  or  assembly 
halls.  In  restaurants  or  night  clubs, 
ceiling  treatment  is  almost  always  de- 
sirable, since  it  tends  to  reduce  the 
noise  caused  by  the  clatter  of  dishes 
in  addition  to  providing  good  acous- 
tics for  the  sound  system. 

Usually  it  is  necessary  to  install  a 
soft  material  and  cover  it  with  a  dec- 
orative fabric  for  the  sake  of  appear- 
ance. Almost  any  soft  material  with 
a  thickness  of  1  in.  or  more  has  good 
sound  absorbing  qualities.  Many  ordi- 
nary materials,  such  as  cotton  batting, 
thick  quilt-like  materials,  blankets, 
clothing,  etc.,  are  good  sound  absorb- 
ers. Most  of  them,  however,  cannot  be 
used  because  of,  first,  they  are  too  soft 
(.Continued  on  page  48) 


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50,000       lOQPOO       150,000      200,000      250,000      300,000      350000 
VOLUME  IN    CUBIC  FEET 

Fig.  3 — Chart  showing  the  amount  of  sound  absorbing  material  to  correct  rever- 
beration  in   an   auditorium. 


October,  1938 


43 


NEW  SOUND  EQUIPMENT 


Thordarson  amplifier 

■*•  60-watt  amplifier  using  dual 
push-pull  6L6  tubes  with  inverse 
feedback.  Three  mike  channels 
and  1  phono  input.  Two  separate 
channels  incorporating  compressor 
and  expander  circuits  which  may 
be  used  separately  and  simulta- 
neously. Cathode-ray  volume  indi- 
cator tube.  Separate  high  and  low- 
frequency  tone  controls.  Thordarson 
Electric  Mfg.  Co.,  500  W.  Huron  St., 
Chicago,  111. — Radio  Today. 


30-watt  sound  systems 

+  Beam-power  amplifier  having 
30-41  watt  output.  Dual  12-inch 
PM  speakers.  Choice  of  microphone. 
Modern  luggage  carrying  case.  4 
input  channels,  multi-impedance 
out-put.  Inverse  feedback.  Clarion 
model  C-458— list  $166.90.  Model 
C-462  with  dual  channel  remote  con- 
trol and  50-ft.  cable— list  $18^.20. 
Transformer  Corp.  of  America,  69 
Wooster  St.,  New  York,  N.  Y  — 
Radio  Today. 


Tilt-type  dynamic  speaker 

*  8-inch  P.M.  type  speaker  as- 
sembled in  attractive  walnut  fin- 
ished cabinet.  When  mounted  on 
wall,  sound  is  projected  downward 
at   an   angle    of   about   15    degrees. 


Space  is  provided  for  volume  con- 
trol and  selector  switch.  Breathers 
are  used  in  sides  of  cabinet  to  im- 
prove tone  quality.  Dust-proof 
voice-coil  mounting.  Line  match- 
ing transformer  with  impedances  of 
375  to  6000  ohms.  Type  D-3008. 
Stromberg  Carlson  Telephone  Mfg. 
Co.,  Rochester  N.  Y. — Radio  Today. 


Webster-Chicago  amplifier 

*  18-watt  p. a.  system.  Four- 
stage  7-tube  amplifier  with  inverse 
feed-back.  Gain  of  125  DB.  Phono 
and  mike  inputs.  Two  input  gain 
controls.  Response  from  50  to  10,- 
000  cycles  within  %  db.  Output  im- 
pedances of  3,  6,  250,  500  ohms. 
Model  2L18.  Webster  Co.,  5622 
Bloomingdale  Ave.,  Chicago,  111. — 
Radio  Today. 


Multi-unit  crystal  mikes 

*  Wide-range  crystal  pressure- 
operated  microphones.  Output  level 
of  —56  DB.  Model  MU-2  is  con- 
structed with  a  double-diaphragm, 
yoke-driven  crystal  units  using  4 
diaphragms.  MU-4  assembly  em- 
ploys 4  units  using  8  diaphragms 
and  is  characterized  by  smoother 
response.  Acoustic  overloading  en- 
tirely eliminated.  Self-locking, 
tilting  head.  Astatic  Microphone 
Lab.,  Inc.,  830  Market  St.,  Youngs- 
town,  Ohio. — Radio  Today. 


Uni-directional   dynamic  mike 

*  Dynamic  type  of  microphone 
having  uni-directional  character- 
istics. Response  of  rear  180°  less 
than  50  per  cent.  May  be  used  for 
close  talking.  Response  up  to  10,- 
000  cycles.  Available  in  high  and 
low  impedance  models.  Model  D9 
low  impedance — list  $35  with 
shielded  cable.  American  Micro- 
phone Co.,  1915  S.  Western  Ave., 
Los  Angeles,  Cal. — Radio  Today. 


Centralized  sound  system 

*  Complete  sound  system  for 
schools  and  institutions.  Will 
handle  up  to  32  rooms.  Has  all- 
wave  tuner.  Talk-back  two-way 
communication.  Input  for  external 
phonograph  unit.  Choice  of  speak- 
ers. Selective  or  group  calling. 
Provision  for  remote  control.  Bogen 
Junior  model  S-32.  List  less 
speakers  $309.50,  16-room  installa- 
tion. David  Bogen  Co.,  Inc.,  663 
Broadway,  New  York,  N.  Y. — Radio 
Today. 


Mobile  sound  system 

*  25-watt  sound  system  for  6- 
volt  or  AC  operation.  Dual  12-inch 
PM  speakers.  Aerodynamic  micro- 
phone. Phonograph  turntable  and 
all  necessary  accessories.  May  be 
used  with  remote  control.  Model 
MI-12754,  list  $245.50.  RCA  Mfg. 
Co.,  Front  St.,  Camden,  N.  J. — 
Radio  Today. 


100-watt  amplifier 

*  17-tube  amplifier  having  100- 
watts  output.  Built-in  4-channel 
preamplifier  and  electronic  mixer. 
Dual-stage  electronic  tone  compen- 
sation. Monitor  loudspeaker.  Il- 
luminated control  panel.  Model  40- 
75C.  Vocagraph  Sound  Systems, 
164  N.  May  St.,  Chicago,  111.— Radio 
Today. 


Exponential  sound  projector 

*  All-steel  baffle  for  use  with 
12-inch  speaker  units.  Extra  large 
shell  takes  care  of  P.M.  speakers. 
Baffle  has  welded  fixture  tapped  to 
take  bracket  or  any  %-inch  stand- 
ard pipe  fitting.  Baked  art  metal 
finish.  Type  S-12  —  list  $18.50. 
Kainer  &  Co.,  761  W.  Lexington  St., 
Chicago,  111. — Radio  Today. 


44 


Radio  Today 


Uses  Approved  Emission 
Circuit  Constructed  to 
RMA  Load  Requirements 
Illuminated  Dial  or  Bad- 
Good   Scale 

Beautiful  metal  case,  black  velvet  electro  finish  with  chrome  fittings.  A  tester 
you  will  be  proud  to  operate  and  proud  to  show. 

This  new  push-button  tester  catches  the  eyes  of  everyone.  Compact  in  size,  light 
in  weight  and  sturdily  built  with  all  wiring  in  orderly  cable  form,  it  can  be  handled 
easily  and  safely.  The  new  black  velvet  finish  case  with  chrome  fittings  and  the 
attractive  colored  buttons  create  an  atmosphere  of  distinction  and  ultra  modern- 
ness  whether  the  tester  is  used  on  the  counter,  in  the  shop  or  on  call  in  the  home. 


TRUE  DYNAMIC  MUTUAL  CONDUCTANCE 


TUBE  TESTERS 


MODEL    1015 

Dynamic  Mutual  Conductance  Tube  Test  shows  not 
GOOD  and  BAD  on  illuminated  dial  but  the  percentage  of 
mu  to  100.  Diodes  and  rectifiers  are  tested  for  emission 
according  to  the  latest  approved  engineering  standards.  Bal- 
last tube  continuity  test  and  gas  test  included.  In  same 
case  as  1610.    Net  price S63.34 

MODKI.    1616 

Same  as  1615  but  includes  push-button  Volt-Ohm- 
Milliammeter.  Decibel  chart  permits  readings 
against  volts  to  42  decibels.  Uses  plug-in  type 
rectifiers.     Net  dealer   Price $76.34 


MODEL    1510 
Model  1510  is  a  Dynamic  Mutual  Conduc- 
tance Tube   Tetter   only.    Same    a>   Model 
1511    less    Volt  Ohm  Milliammeter. 
Net  Price  .  $49.67 

MODEL    1511 

Is  same  as  Model  1616  but  is  in  a  standard 
1 500  series  quartered- oa k  case  with  selector 
switch  controls.  Net  Dealer  Price  $59.67 


•  Combines  push-button  Volt-Ohni- 
Milliammeter  with  Tube  Tester  of 
Model  1610  in  same  type  case.  Read- 
ings: D.C.  Volts  0-10-50-250-500-1000 
at  1000  ohms  per  volt;  D.C.  Milliam- 
peres  0-1-10-50-250;  low  ohms  shunt 
type  circuit  %  to  500;  300,000  ohm:,, 
1.5  and  3  megohms,  series  type  cir- 
cuit; A.C.  Volts  0-10-50-250-500-1000 
at  400  ohms  per  volt.  Uses  plug-in 
type  copper  oxide  rectifiers.  Model 
1611.    Dealer  $4Q50 

Net  Price 


*495 


MODEL  1212  TUBE  TESTER 

•  Emission,  type  tube  tester  circuit  as 
used  in  Model  1610  but  unit  has  selec- 
tor switches  instead  of  push-buttons 
and  is  installed  in  popular  master  case. 
Net  Dealer  $OO00 

Price *ltl 

BE  SURE  TO  ENTER  TRIPLETT'S 

$500.00  RADIO  SERVICE 

PUZZLER  CONTEST! 

Get  Entry  Blank  from  your  Local  Jobber.' 

THE  TR1PLETT  ELECTRICAL  INSTRUMENT  CO. 
1910  Harmon  Dr.,  Bluffton,  Ohio 

□  Please  send  me  more  information  on: 

□  Model  1610  □Modell611  nModell615 

□  Model  1616  □  Model  1  51 1)  □  Model  1511 

□  Details  on  Radio  Service  Puzzler  Contest 


Name 


Address 
City .... 


I 


October,  1938 


45 


STOP... 

UNWANTED  SOUNDS 


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NEW  SHURE  "UNIPLEX" 
REALLY  SOLVES  FEEDBACK, 
BACKGROUND  NOISE  AND 
REVERBERATION   PROBLEMS 

There's  no  other  microphone  like 
this  uni-directional  "Uniplex."  It 
solves  pick-up  problems — -does  most 
every  sound  pick-up  job  better — yet 
costs  surprisingly  little.  Provides  ex- 
cellent high-quality  response  from 
30  to  10,000  cycles  at  the  front, 
yet  is  practically  unaffected  by 
sound  approaching  from  the  rear. 
Tilting  head,  in  new  "speed-line" 
design  and  rich  Satin  Chrome  fin- 
ish. Equipped  with  new  Shure 
built-in  Cable  Connector  and  25  ft. 
of  special  noise-free  Super-Shielded 
Cable.  Model  730A  "UNIPLEX" 
Crystal  Microphone. 
List  Price $29.50 


NEW  SHURE 
"ROCKET" 

A  semi  -  direc- 
tional crystal 
microp  hone 
with  perform- 
ance matching 
its  striking 
s  t  r  e  a  inlined 
beauty  "Ultra" 
wide-range  re- 
sponse. A91A 
Battle  increases 
high    frequency 

discrimination  against  sound  from 
sides  and  rear.  Model  705A  "Rocket." 
List     price,     with    25    ft.     cable     and 

Ping     $25 

(A91A    Baffle,   ¥2.50    List   Extra) 

"Sound  Systems  Sound  Better 
with    Shure    Microphones" 

Shure    Patents    Pending.       Licensed 
under  patents  of  the  Brush  Develop- 
ment   Company. 


SHURE     BROTHERS 

"Microphone  Headquarters" 
225  W.  HURON  ST.  CHICAGO,  U.S.A. 


MORE   NEW  THINGS 


Radolek  sound  system 

*  25-watt  P.A.  system  with 
high-fidelity  amplifier  having  130 
DB  gain.  Dual  microphone  input 
and  phonograph  input  mixing  facil- 
ities. Record  player,  microphone 
and  floor  stand  housed  in  one  case. 
Other  systems  from  10  to  90  watts. 
Radolek  Co.,  601  W.  Randolph  St., 
Chicago,  111. — Radio  Today. 


Mike  with  acoustic 
compensator 

*  The  acoustic  compensator  is 
now  being  supplied  with  the  lower- 
priced  models  such  as  the  RSHK, 
RBSK  at  no  extra  cost.  These 
makes  also  come  equipped  with 
cable  connector  and  switch.  Acous- 
tic compensator  is  a  mechanical 
shutter  that  gradually  closes  the 
back  of  the  mike,  changing  the  oper- 
ation from  velocity  to  pressure.  List 
for  the  RSHK  and  RBSK— $32.  Am- 
perite  Co.,  561  Broadway,  New  York, 
N.  Y.— Radio  Today. 


Lafayette  amplifier 

■*  30-40-watt  amplifier  for  sound 
systems.  Model  277A  illustrated. 
Other  ampliers  available  for  all 
purposes.  The  Lafayette  line  includes 
50  completely  coordinated  sound 
systems  and  40  amplifiers.  Small- 
est unit  is  a  5-watt  system — largest 
one  will  handle  an  audience  of 
100,000  persons.  Wholesale  Radio 
Service  Co.,  100  Sixth  Ave.,  New 
York,  N.  Y. — Radio  Today. 


Mobile  microphone 

*  Hand-type  dynamic  micro- 
phone weighing  only  13  ounces.  Fits 
into  palm  of  hand.  Designed  for 
close  talking.  Is  rugged  and  im- 
pervious to  heat  and  rough  hand- 
ling. Available  in  high  and  low  im- 
pedances. Complete  with  switch 
and  8-ft.  cable.  Electro-Voice  Mfg. 
Co.,  324  E.  Colfax  Ave.,  South  Bend, 
Ind. — Radio  Today. 


Bell  school  system 

+  Sound  system  for  use  in 
schools  and  other  similar  places. 
Unit  illustrated  will  handle  up  to 
30  rooms.  Has  high-quality  radio. 
Talk-back  intercommunicating  sys- 
tem. 24-watt  amplifier  with  bass 
and  treble  compensation.  Provision 
for  phonograph.  Master  switch  for 
each  panel  of  10  switches.  Priced 
at  .$295  for  10  rooms  less  speakers. 
Bell  Sound  Systems,  1183  Essex 
Ave.,  Columbus,  Ohio. — Radio  To- 
day. 


Silvered  mica  condensers 

+  Condensers  with  extremely 
stable  characteristics  for  use  in 
tuned  circuits.  Silver  is  deposited 
directly  on  the  mica.  Available  in 
capacities  from  5  to  5,000  mfd  in 
two  physical  sizes.  Tolerances  as 
low  as  plus  or  minus  1  per  cent. 
Sprague  Products  Co.,  North  Adams, 
Mass. — Radio   Today. 


AC  power  plants 

•  2000  and  3000-watt  AC  plants 
with  water  cooling.  Welded-steel 
generators.  Available  with  manual, 
self  -  starting,  or  fully  -  automatic 
starting.  Two-cylinder  4-cycle  gas 
engines  operating  at  1800  r.p.m. 
Units  shielded  against  radio  inter- 
ference. 12-volt  DC  current  for  re- 
charging the  starting  battery.  Rub- 
ber bushings  absorb  vibration.  D. 
W.  Onan  &  Sons,  45  Royalston  Ave., 
Minneapolis,    Minn. — Radio    Today. 


46 


Radio  Today 


Reflexed  trumpets 

*  Reflexed  type  of  air-column 
trumpets  for  sound  installations. 
Uses  P.M.  type  unit.  Model  S.M.R. 
has  an  air  column  of  30  inches. 
Smallest  overall  dimensions  of  any 
unit.  Other  types  with  air  columns 
up  to  72  inches.  Absolutely  water- 
proof for  use  in  outdoor  applica- 
tions. Efficiency  twice  that  of  cone 
unit.  University  Labs,  195  Chrystie 
St.,  New  York,  N.  Y—  Radio  Today. 


Lo-capacity  switch 

*  Lever-action  switch  with  low 
capacity  between  circuits.  Avail- 
able in  single  or  multiple  mount- 
ings. Standard  types  of  contacts 
available  for  broadcasting,  receiv- 
ing, amateur  applications,  public  ad- 
dress, and  signaling  equipment. 
Described  in  form  Nos.  628  and  694. 
Centralab,  900  E.  Keefe  Ave.,  Mil- 
waukee, Wis. — Radio  Today. 


Recording  blanks 

■*•  Semi-plastic  blank  for  instan- 
taneous recording  and  immediate 
playback.  The  cellulose-nitrate 
coated  blanks  will  be  distributed  in 
2  types.  "Silveroid"  soft  blanks 
are  for  extremely  free  cutting. 
"Professional,"  a  harder  type,  is  of 
extremely  high  density,  producing 
extremely  wide  frequency  response. 
Universal  Microphone  Co.,  Ingle- 
wood,  Cal. — Radio  Today. 


.  .  .  and  depend  upon  the  most  exten- 
sive line  of  loud  speakers  and  acces- 
sories in  the  world  for  your  selection, 
all  of  them  built  to  the  same  high  Jen- 
sen quality  standard  .  .  .  for  which 
there  is  no  cost  premium. 


UA 


HETHER  for  replacement  in  the  smallest  radio 
receiver,  use  in  the  finest  organs  or  in  the  world's 
largest  theatres,  there  is  a  Jensen  product  built  for 
the  purpose.  And  we  believe  that  more  of  them  are 
used  in  these  applications  than  any  other  known  loud 
speaker. 

No  Service  Dealer,  Sound  Dealer  or  any  buyer  or 
user  of  loud  speakers  should  be  without  complete  in- 
formation of  the  extensive  line  of  Jensen  loud  speak- 
ers and  accessories.  A  new  catalog,  16  pages,  has  just 
been  completed  .  .  .  and  it's  yours  for  the  asking. 
It  includes  descriptions  of  the  smallest  and  the  larg- 
est speakers,  accessories  and  complete  High  Fidelity 
Reproducers  in  handsome  cabinets.  We  consider  it 
to  be  the  most  comprehensive  book  of  its  kind  ever 
published. 


*&&^ 


NEW 

16  PAGE 

JENSEN 

CATALOG 

GIVES 

COMPLETE 

SPEAKER 

INFORMATION 


Jensen  Speaker 

for  Every  Purse 

and   Purpose 


Replacement  speak- 
ers .  .  .  P5I  and  Field 
Coil  types  .  .  .  fixed 
and  adjustable  trans- 
formers .  .  .  all  sizes 
...  at  strictly  com- 
petitive prices. 


For  outstanding 
sound  reproduction 
.  .  .  heavy  duty  Audi- 
torium, 15-inch  and 
18-inch  speakers.  The 
finest  offered  any- 
where. 


Peri-Dynamic  Repro- 
ducers. ...  A  Jensen 
contribution  of 
real  merit  for  im- 
proved sound  in- 
stallations .  .  .  for 
,  10,  12,  14,  15  and 
lS-inch  sizes. 


And  many  others. 
.  .  .  Don't  be  with- 
out   this    Catalog ! 


FREE . . . 


Just  mail  this 
coupon  -^ 


JEXSEN  RADIO   MFG.  COMPANY 

0601  So.  Laramie  Ave.,  Chicago,  111.       RT-1038 

n  Please   rush   me   your   New   16-page   Loud 
Speaker  Catalog. 


Name  .  . 
Address 
City.  .  .  . 


October,  1938 


47. 


This  LOWEST  COST 

Portable  Sound  System 
builds    sales    and    rentals 


complete 
crystal  microphone,  stand, 
carrying  case  $OQ60 
P.  M.  Speaker    .  .   "^ 

•  Here  is  the  low  cost — modern  high 
fidelity  portable  sound  system  —  that 
every  sonnd  man  and  radio  dealer  has 
needed  for  profitable  rentals  and  quick 
sales. 

Use     it     for     window     demonstrations, 

singing  acts,  call  systems,  etc.  Fidelity 
and  tone  range  to  equal  largest  sys- 
tems. Complete  equipment  includes 
VOCAGRAPH  five  watt  high-gain  am- 
plifier, newest  bullet-type  crystal  mi- 
crophone with  25  ft.  cable,  8  in.  p.m. 
dynamic  speaker,  and  fabricord  covered 
carrying   case. 

VOCAGRAPH  is 

The  Most  Complete  Sound  Line 
5  to  100  Watt  Systems 

For  every  sound  need — there  is  a 
VOCAGRAPH  amplifier  to  £ive  depend- 
able performance — at   low  cost! 

12-WATTS — Amplifier   only $16.50 

Portable    Complete    System...    41.40 

20-WATTS — Amplifier  only 27.90 

Portable    Complete    System...    67.20 

30- WATTS — Amplifier  only 39.00 

Portable    Complete    System...    90.00 

40-WATTS — Amplifier  only 57.00 

100-WATTS — Amplifier   only S4.00 

0  AND  110V  MODELS 
20-WATT — Complete  Amplifier.  .$4S.00 
30- WATT — Complete  Amplifier..  66.00 
Compare  these  prices — and  you  will  see 
why  VOCAGRAPH  leads  all  others  in 
sales  gains.  Complete  descriptive  bul- 
letins   are    available     upon     request. 

See  Your  Jobber  or  Write  Today 


'ocagraph  Sound  Systems 


162-C  N.  MAY  ST.,  CHICAGO,  U.  S.  A. 

FREE— 1939  CATALOG! 
I 1 

Send  at  once  new  VOCAGRAPH  1939  Cataloo  and  J 
I  place  our  name  on  your  mailing  list  for  all  new  I 
I   model   rnnouncements. 

'    NAME I 

I  I 

[ADDRESS    I 


ACOUSTICS  FOR  SOUND  JOBS 

(From  page  43) 

to  be  handled  and,  therefore,  cannot  he 
properly  installed.  Likewise,  they 
would  dirty  fast.  Secondly,  many  ma- 
terials, although  fairly  soft  and  good 
sound  absorbers,  are  too  expensive  to 
be  used  for  acoustical  correction.  Many 
other  materials,  however,  such  as  rock 
wool  blankets  or  hair  felt,  insulating 
board,  etc.,  are  reasonably  good  be- 
cause they  can  be  handled  and  the 
cost  is  relatively  low.  If  curved  sur- 
faces exist  in  the  auditorium  and  tend 
to  produce  echoes,  they  should  be  cov- 
ered entirely  with  a  good  sound  ab- 
sorbing material.  While  the  echoes 
cannot  be  entirely  eliminated,  the 
treatment  usually  weakens  them  to 
the  point  where  they  cease  to  be  trou- 
blesome. 

No  doubt  cases  will  be  encountered 
where  the  above  simple  formula  and 
simple  selection  of  materials  are  not 
adequate  to  solve  the  problem  to  the 
owner's  satisfaction.  In  these  cases 
the  P.  A.  salesman  should  contact  a 
reputable  manufacturer  of  acoustical 
materials.  These  firms  maintain 
trained  engineers  to  handle  the  more 
difficult  complaints.  On  the  other  hand, 
it  is  believed  that  much  trouble  can  be 
avoided  by  those  who  deal  in  sound 
systems  by  following  the  simple  pro- 
cedure  outlined  above. 


MAKE  IT  EASY  FOR  PROSPECT 
TO  UNDERSTAND 

(From  page  35) 

installations  and,  if  possible,  secures  a 
letter  of  testimonial  outlining  "how 
much  time  is  saved  and  better  effi- 
ciency is  maintained  by  the  sound 
equipment — its  dependability  and  sat- 
isfactory service." 

However,  the  use  of  such  letters 
has  to  be  watched,  for  often  the  pros- 
pect will  get  the  impression  that  after 
the  sale  is  made  he  will  be  a  walking 
advertisement  for  you.  Pictures  are 
better  than  letters  in  the  long  run,  and 
simple  explanation  given  to  the  next 
prospect  about  the  various  installa- 
tions and  the  names  of  the  organiza- 
tions, will  convince  the  most  skepti- 
cal. 

After  the  installation  is  completed, 
a  few  calls  should  be  made  at  regular 
intervals  to  determine  whether  the 
system  is  working  properly.  During 
the  first  month,  a  few  stops  should  be 
made  to  see  if  the  purchaser  under- 
stands the  operation.  With  such  pre- 
cautions, little  or  no  service  trouble 
should  develop.  It  is  definitely  cheaper 
for  a  salesman  to  drop  in  for  a  call, 
when  in  the  neighborhood,  than  to 
send  a  trouble-shooting  serviceman 
when  a  real  emergency  does  occur 
through  lack  of  proper  instruction. 


Par  Metal 


SOUND   MEN!! 

These  new  de-luxe  units  will 
increase  your  profits  .  .  .  grey 
or  black  .  .  .  streamlined  with 
chromium  trim. 


New  Catalog  Now  Ready! 
You     need     it!       Illustrates     and     de- 
scribes     many      racks,      panels      and 
chassis    which    you    can    use    in    your 
P.  A.   work.     Get   it.   .   .   .   It's   FREE! 

PAR  METAL  PRODUCTS  CORP. 

3521  41st  Street  Long  Island  City,  N.  Y. 


BUILT   TO   DO  A 
BETTER  P.  A.  JOB 


IMPROVED  OXFORD 
PER  MAG  SPEAKERS 

Stepped-up  in  sensitivity,  and  otherwise 
improved  in  construction — Oxford  Per- 
mag  (Permanent  Magnet)  Speakers  spe- 
cially developed  for  Public  Address  and 
Intercommunicating'  Systems  now  enable 
sound  engineers  to  do  a  better  job  at  no 
more  cost.  Available  in  convenient  stock 
sizes  from  3  inches  to  14  inches — or  spe- 
cial units  designed  to  meet  specifications. 
See  your  Jobber  or  write  today  for  com- 
plete information. 

New  York  Office:  27  Park  PL,  New  York 


Okford-Thrthk 


Bmnsnnra 


48 


Radio  Today 


SOUND  SHORTS 


Under  the  name  Dutyphone,  Regal 
Amplifier  Mfg.  Corp.  has  announced  a 
new  2-station  wired  intercommunicat- 
ing system  to  be  sold  at  $9.95.  This 
list  price  is  lower  than  anything  known 
in  the  field,  according  to  sales  manager 
Walter  Spiegel.  The  units  are  hooked 
up,  ready  for  use  by  plugging  into  any 
110-volt  AC  or  DC  line.  Greater  wire 
lengths  up  to  500  feet  can  be  used 
without  additional  attachments.  Cab- 
inets are  made  of  wood,  finished  in 
telephone  black.  Tubes  used  are  one 
25A7,  one  6C6  and  ballast. 

J.  C.  Koonz,  of  the  Magnavox  Co.,  Ft. 
Wayne,  Ind.,  has  been  advanced  to  the 
post  of  sales  manager  of  the  capacitor 
division.  Mr.  Koonz  has  been  with 
Magnavox  for  10  years;  he  has  been 
busy  in  the  Chicago,  New  York  and 
Philadelphia  areas  as  salesman  or  dis- 
trict manager. 

Messrs.  Murphy  and  Cota,  291  Peach- 
tree  St.,  N.E.,  Atlanta,  Ga.,  have  been 
appointed  by  Atlas  Sound  Corp.  as 
sales  representatives  in  Georgia,  Ten- 
nessee, North  and  South  Carolina. 

Atlas  has  also  announced  that  J.  E. 
McKinley,  1819  Ridge  Ave.,  Coraoplis, 
Pa.,  has  been  named  to  assist  the  Pitts- 
burgh, Pa.,  representative  John  0. 
Olsen.  Mr.  McKinley  will  cover  West 
Virginia,  and  parts  of  western  Penn- 
sylvania. 

Bell  Sound  Systems,  Inc.,  have 
moved  into  a  new  plant,  a  modern 
3-story  factory  and  office  building  at 
1183  Essex  Ave.,  Columbus,  Ohio.  In- 
creased volume  on  Bell  permanent  and 
portable  PA  systems,  intercommuni- 
cators,  etc.,  is  the  reason  for  expan- 
sion in  manufacturing  facilities;  the 
company  covers  the  U.S.  and  13  coun- 
tries abroad  and  is  rapidly  expanding. 
F.  W.  Bell  is  president;  R.  E.  Potts 
sales  manager. 

In  what  is  announced  as  the  first 
large-scale  national  consumer  cam- 
paign on  home  recorders,  Presto  Re- 
cording Corp.,  139  W.  19th  St.,  New 
York  City,  has  begun  a  series  of  ad- 
vertisements in  Esquire,  Scribner's, 
The  New  Yorker,  Parent's  Magazine, 
Stage,  House  Beautiful  and  Down  Beat. 

Large  scale  production  is  the  reason 
for  extensive  improvements  and  al- 
terations being  made  at  Universal  Mi- 
crophone Co.,  Inglewood,  Calif.  The 
company  will  specialize  on  uniform 
quality  and  prompt  delivery  of  its  reg- 
ular line  of  blank  recording  discs  as 
well  as  on  a  new  line  of  recording 
blanks  about  to  be  introduced. 

Cinaudagraph  has  announced  a  big 
advertising  program  in  all  major  trade 
magazines  this  Fall.  The  ads  will  fea- 
ture the  quality  and  economy  of  the 
company's  line  of  electro  -  dynamic 
speakers  from  5  in.  to  18  in.  and  per- 
manent magnet  speakers  from  5  in.  to 
18  in.,  which  are  "designed  to  meet  all 
needs  of  radio  set  makers,  PA  equip- 
ment engineers,  servicemen,  and  ama- 
teurs." 


Model  S-40,  sectionalized  .  .  . 
for  smaller  schools  .  .  .  will 
handle  any  number  of  rooms 
from  1  to  40. 


A  BRAND  NEW  SCHOOL  LINE 

THAT'S  GOING  OVER  IN 

A  BIG  WAY 

•  Telegrams!  Long  distance  calls! 
Rush  shipments!  .  .  .  That's  what's 
going  on  with  Webster-Chicago  in 
the  school  field. 

New  and  better  application  of  Web- 
ster-Chicago's famous  Sectionalized 
Sound  System  has  placed  sound 
within  reach  of  schools  of  all  sizes. 

Don't  fail  to  investigate  the  possi- 
bilities in  your  community! 

MODEL  305-7 


•  Because  its  answers  the  need 
for  the  small  business  at  very  low 
cost,  dealers  report  sales  of  Sys- 
tem 305-7  in  such  quantities  that 
it  is  our  conviction  it  is  the  big- 
gest money-making  opportunity 
in  sound  history. 

Every  business  is  a  prospect ;  gar- 
ages, service  stations,  coal  and 
lumber  yards,  warehouses,  bowl- 
ing alleys,  clubs,  etc.  .  .  .  busi- 
nesses and  activities  present  in 
every  community. 

Why  not  learn  all  about  it? 
Folder  is  free  to  any  dealer  on 
request. 


Model  305-7  .  .  .  Paging  .  .  . 
Talk  Back  .  .  .  Remote  Station 
Call  .  .  .  No  Microphone  neces- 
sary .  .  .  Easy,  Simple  Installa- 
tion .  .  .  Extremely  Low  in  Cost. 
.  .  .  No  wonder  it  is  selling  big. 
.  .  Be  sure  to  send  for  brochure 
below ! 


A  few  7  6-page  booklets  left  on  Sound 
Engineering,  theory  and  practice. 
Copies   free  while  they  last. 


WEBSTER-CHICAGO 


WEBSTER-CHICAGO 

Section    0-9,    5622    Bloomingdale   Ave.,    Chicago,    III. 

Please  send   me  free  copy — 

n  "The    Greatest     Money-Making     Opportunity    in    Sound     History.' 

□  "Sound   Engineering." 

Name     

Address 

City State 


October,  1938 


49 


Dynamic  Testing — Part  IX 


PENTODE   LOAD   IMPEDANCES 

The  need  for  proper  load  matching  in  pentode  amplifiers 
and    how   to    dynamically   test   for    proper    conditions 


By  Vixrax  K.  Ulrich,  Service  Editor 
While  all  design  engineers  and  many 
sound  specialists  realize  the  need  for 
proper  matching  of  the  load  in  power 
output  amplifiers,  altogether  too  few 
radio  servicemen  take  this  factor  into 
account  in  their  work.  Up  to  the  pres- 
ent, part  of  the  difficulty  could  be 
traced  to  inadequate  means  of  quickly 
checking  the  conditions. 

In  Radio  Today  for  September,  on 
pages  52,  53,  and  56,  the  subject  of 
load  impedances  in  triode  amplifiers 
was  discussed  and  a  method  of  quickly 
checking  for  proper  load  impedance 
was  described.  While  the  method  is 
not  highly  accurate,  it  is  sufficiently 
sensitive  to  detect  improper  load  im- 
pedances that  adversely  affect  the  per- 
formance of  the  amplifier. 

Pentodes  more  critical 

With  pentode  type  tubes,  the  use  of 
a  proper  load  impedance  is  many 
times  more  important  than  with  tri- 
odes.  While  triode  tube  characterist- 
ics introduce  distortion  at  low  values 
of  plate  current  (high  negative  grid 
voltages),  the  pentode  amplifier  may 
also  introduce  distortion  at  the  upper 
portion  of  the  tube  characteristic. 
(Low  negative  grid  voltages). 

In  Fig.  1,  the  plate  current  vs.  plate 
voltage  characteristics  are  shown  for 
a  typical  pentode  amplifier  tube.  Plate 
load  lines  for  three  values  of  load  re- 
sistance are  shown  for  a  plate  voltage 
of  250  and  bias  of  — 25  volts.  The 
load  lines  illustrated  are  for  2150 
ohms.  6750  ohms  (recommended 
value),  and  50,000  ohms.  The  internal 
plate  impedance  of  the  tube  is  about 
80,000  ohms. 

Although  the  method  of  constructing 


Dynamic  Testing  as  developed  and 
sponsored  by  Radio  Today,  is  an 
independent  method  of  testing,  (or 
servicemen,  which  can  be  used  with 
any  brand  of  suitable  quality  servicing 
instruments.  Radio  Today  does  not 
advocate  the  use  of  one  type  of  in- 
strument against  another,  but  leaves  it 
to  the  individual  manuacturers  to 
present  their  own  sales  arguments  re- 
garding the  special  merits  of  the 
respective  product.  The  purpose  of 
Dynamic  Testing  is  to  help  the 
serviceman  make  his  diagnosis  as  fast 
as  possible  and  to  make  fullest  use  of 
quality  instruments. 


a  load  line  was  discussed  last  month, 
a  brief  review  of  the  principle  will  re- 
fresh the  readers'  memories.  If  an  ex- 
ternal plate  load  resistance  is  assumed, 
then  the  reader  knows  that  there  will 
be  a  voltage  drop  across  this  resist- 
ance which  depends  upon  the  value  of 
plate  current  flowing.  Past  experience 
has  shown  that  if  the  grid  bias  is  de- 
creased, the  plate  current  will  increase 
a  certain  amount.  Because  this  in- 
creased plate  current  must  also  flow 
through  the  load  resistance,  it  follows 
that  there  must  be  an  additional  volt- 
age drop  across  the  resistance. 

Assuming  that  the  plate  voltage  sup- 
ply remains  constant,  which  is  gener- 
ally true,  the  voltage  across  the  tube 
itself  must  decrease  by  an  amount 
equal  to  the  increased  voltage  drop 
across  the  plate  load  resistance.  For 
Fig.  1,  at  point  O,  the  plate  current  is 
32  mils  for  250  volts  on  the  plate  and 


— 25  volts  bias.  For  point  Ei,  the  bias 
is  decreased  to  — 20  volts.  The  plate 
voltage  value  for  that  point  is  198,  and 
the  plate  current  is  39%.    From  Ohms 

Law,  resistance  equals  —     Substitut- 

250  —198     52 

=  —  =  6750  ohms. 

39%— 32  7% 
Since  the  increase  in  plate  current  has 
brought  about  a  voltage-drop  increase 
equal  to  that  which  would  be  obtained 
through  a  6750  ohm  resistance,  the 
load  line  is  said  to  represent  a  resist- 
ance of  6750  ohms. 

Dynamic  tube  characteristics 

If  the  points  A,  B,  C,  etc.,  are  plotted 
in  terms  of  plate  current  versus  grid 
bias,  one  obtains  the  curve  shown  in 
Fig.  3-A,  which  is  called  the  dynamic 
characteristic  of  the  tube  for  a  plate 
load  of  2150  ohms.  The  term  dynamic 
is  used,  since  the  curve  takes  into  ac- 
count the  plate  load  impedance  and  in- 
stantaneous plate  voltage  variations. 
Similarly  a  curve  is  plotted  from  Aj, 
Bn,  d,  etc.,  for  a  load  of  resistance  of 
6750  ohms.  The  exceeding  high  value 
of  load  resistance  of  50,000  ohms  is 
plotted  from  the  values  A2,  B2,  C„,  etc., 
and  is  shown  in  Fig.  3-C. 

In  order  to  show  how  these  tube 
characteristics  affect  the  waveform  of 
the  input  signal,  the  grid  signal  has 
been  shown  below  the  characteristic 
superimposed  upon  the  bias  voltage 
in  the  usual  manner.  The  points  are 
projected  up  from  the  grid  signal  to 
the  tube  characteristic  and  then  to  the 
right  to  form  the  current  output  wave- 
form. See  Fig.  3-A  for  a  complete  por- 
trayal of  the  points  involved.  The 
points  on  the  curves  correspond  to 
those  shown  in  Fig.  1. 


Fig.     1 — Plate    characteristics    and    three    values    of    load 
resistances  used   for   calculating   curves   of   Fig.  3. 


Fig.  2 — Load  lines  (resistances)  showing  plate  voltage  swings 
(points    X,   X',    O,   Y,   Y')    for   no-load   and   load   conditions. 


50 


Radio  Today 


Even  harmonics 

In  Fig.  3-A,  the  top  half  of  the  cur- 
rent wave  is  considerably  greater  than 
that  of  the  lower  half.  This  indicates 
a  fairly  large  amount  of  even  harmon- 
ics, such  as  the  2nd  and  4th.  (In  wave 
form  analysis,  non-symmetry  indicates 
even  harmonics).  The  average  plate 
current  for  a  swing  of  23  volts  in- 
creases to  39  milliamperes,  although 
for  no  signal  the  plate  current  is  only 
32  milliamperes.  This  increase  in 
average  plate  current  is  caused  by  the 
non-linearity  of  the  tube  characteristic 
and  is  to  be  expected. 

In  Fig.  3-B  the  top  and  bottom  halves 
of  the  output  wave  are  fairly  symmet- 
rical. This  is  caused  by  the  flattening 
of  the  top  of  the  dynamic  tube  char- 
acteristic. Since  the  waveform  is  fair- 
ly symmetrical,  it  follows  that  there  is 
little  even-harmonic  distortion.  What 
distortion  that  occurs  is  mainly  odd- 
harmonic.  The  operation  indicated  by 
this  chart  is  for  the  normal  recom- 
mended conditions.  Even  under  this 
normal  operation,  the  plate  current 
rises  to  33  mils  when  the  grid  is  ex- 
cited by  a  23  volt  signal.  While  the 
increase  is  only  1  milliampere,  for  a 
signal  swing  of  25  volts  equal  to  the 
grid  bias,  the  rise  would  probably  be 
2  mils.  This  represents  an  increase  of 
about  7  per  cent  over  no  signal  condi- 
tions, and  is  entirely  normal  for  class 
A  operation  of  the  amplifier. 

Flattening  of  the  tube 
characteristic 

In  Fig.  3-C  the  conditions  are  about 
the  worst  possible.  The  plate  load  im- 
pedance is  very  nearly  equal  to  the  in- 
ternal plate  impedance  of  the  tube. 
Note  how  the  top  half  of  the  current 
■wave  is  practically  non-existent  be- 
cause of  the  flattening  of  the  dynamic 


Fig.  4 — Curves  show  variation  of  har- 
monics for  different  values  of  load  im- 
pedance. Note  that  the  harmonics 
change  more  rapidly  than  the  power 
output    in   the    region    of    7,000    ohms. 

tube  characteristic  for  low  values  of 
grid  voltage.  Since  the  top  half  of  the 
current  wave  is  so  small,  it  is  to  be  ex- 
pected that  the  plate  current  for  this 
condition  will  decrease  tremendously 
when  the  grid  of  the  tube  is  fully  ex- 
cited with  a  sine-wave  signal.  Actually 
it  drops  from  32  mils  to  26  mils  with 
a  signal  having  a  peak  of  23  volts. 

In  view  of  the  fact  that  tremendous 
distortion  is  caused  in  pentode  ampli- 
fier merely  by  the  wrong  load  impe- 
dance, it  is  essential  that  the  service- 
man and  sound  specialist  look  into  this 
trouble  if  a  radio  set  or  amplifier  will 


not  deliver  its  full  undistorted  output. 

With  triode  amplifiers,  a  method  of 
load  and  no  load  measurements  across 
the  voice  coil  winding  of  the  output 
transformer  was  described.  It  was 
shown  that  the  load  voltage  for  triodes 
should  not  be  less  than  2/3  of  the  no 
load  for  single-ended  class  A  ampli- 
fiers, and  that  slightly  less  (60  per 
cent)  might  be  tolerated  for  push-pull 
amplifiers  because  of  the  cancellation 
of  even  harmonics. 

For  pentode  amplifiers,  the  load  volt- 
age is  a  much  smaller  fraction  of  the 
no  load  voltage  since  the  load  impe- 
dance is  always  a  small  fraction  of  the 
tube  plate  impedance.  Generally  the 
plate  load  impedance  is  1/5  to  1  10  of 
the  plate  impedance.  If  the  tube  impe- 
dance is  considered  as  being  in  series 
with  the  load  impedance,  then  the 
voltage  across  the  sum  of  the  two  im- 
pedances will  be  roughly  6  to  11  times 
that  across  the  load,  since  the  total 
resistance  is  6  to  11  times  that  of  the 
load.  (This  voltage,  however,  cannot 
be  measured  for  reasons  to  be  ex- 
plained later). 

In  Fig.  2,  the  typical  operating  con- 
ditions of  a  type  89  pentode  are  shown 
for  proper  load  impedance  (line  X' — 
O — Y')  and  for  open  circuit  or  no 
load  conditions  (line  X — O — Y).  If 
the  tube  is  excited  with  an  AC  voltage 
having  a  peak  about  1/10  of  the  bias 
voltage,  a  voltage  swing  appears  across 
the  plate  load  impedance.  For  proper 
lead  impedance  this  voltage  is  250 — 
228=22  and  274  —250=  24.  The  aver- 
age of  these  two  is  23  volts.  For  open 
load  conditions  the  voltage  obtained 
are  250  —164=86  and  370  —250=120 
or  an  average  of  103.  In  this  particular 
instance  the  ratio  is  about  4%  to  1. 

In  usual  receivers  the  losses  in  the 

(Continued  on  page  55) 


Fig.  3 — The  dynamic  characteristics  and  consequently  the  tube  output  currents  are  greatly  affected  by  the  value  of  the  load 
resistance.     3-B  represents  a  normal  value  of  load  impedance.     The   distortion  shown  in  3-A   and  3-C   is   caused   only  by 

improper  load  impedances. 


October,  1938 


51 


BROADENING  THE  SOUND  MARKET 

(From  page  36) 

cover  a  whole  state.  A  re-alignment  of 
this  situation  will  change  the  picture 
entirely. 

As  a  rule,  the  radio  dealer  knows 
his  immediate  vicinity  like  a  book. 
Every  worth-while  civic  minded  or  ac- 
tive business  man  is  already  carded. 
Just  reflect  for  a  moment  and  you  will 
immediately  realize  how  easy  it  is  for 
the  radio  set  dealer  to  obtain  practi- 
cally every  sound  sale  in  his  respective 
locality,  simply  because  he  knows 
where  every  single  outlet  is  and  whom 
to  see  about  it — further  he  is  right  at 
their  doorstep.  No  additional  sales  ex- 
pense is  necessary.  Just  pull  the  card 
out  of  the  file,  make  a  telephone  call, 
demonstrate  and — bingo — a  sale  that 
would  have  gone  to  an  out-of-state  con- 
cern becomes  a  profitable  return  to  the 
local  dealer. 

Why?  What?  How? 

R.   C.  Eeinhardt 

Atlas  Sound  Corp.,  Brooklyn,  N.  Y. 

The  commercial  application  of 
sound  embraces  a  legitimate  and  tangi- 
ble market.  All  industrial  and  com- 
mercial organizations  are  interested  in 
reducing  operating  expenses  or  giving 
better  service. 

Remember,  you  are  not  selling  a 
cheap  or  sensational  novelty  to  a  gul- 


The  famous  terrier  Nipper  is  being  heard,  as  well  as  seen,  by  RCA  Mfg.  Co. 
president  George  K.  Throckmorton.  The  dog  now  contains  a  loudspeaker,  for  pro- 
motion purposes;  part  of   RCA  Victor's   eye-and-ear-catching  40th   anniversary. 


lible  individual.  The  factors  that  will 
interest  Mr.  Practical  Businessman, 
are:  "Why  do  I  need  it?  "What  are  its 
advantages  over  the  present  arrange- 
ment, if  any?  How  much  will  it  save 
me  in  lost  time  and  effort?  How  long 
will  it  take  for  it  to  pay  for  itself  in 
effected  savings?"  Price  is  not  the 
issue.  The  value  is  measured  in  re- 
sults. 


Legitimate  lighting  and  electrical 
contractors,  motor  specialists,  etc.,  op- 
erate in  a  businesslike  manner  and  en- 
joy the  respect  and  financial  reward 
their  profession  entitles  them  to.  The 
P.  A.  contractor  should,  ,and  rightly  so, 
establish  himself  in  a  similar  manner 
and  not  as  an  irresponsible,  loose-talk- 
ing genius. 

(Continued  on  page  54) 


PLIFEERS 


By    THORD ARSON 


Built  to- 


Ptuce 


Peer  of  a 

Distinguished  Line 

The  60  WATT 


accentuation    at    both    high ; and    lc 
quencies  by  sepa 

-Compressor   Circuit    wui    tvww    ae^aKiie    uiuu 

nels.    •   Three   high   impedance,    high    gai: 
microphone    chan 


of  loud  speake 
jobber  or 


Model  No.  T-20W60 


THORDARSON  ELECTRIC  MFG.  CO. 
500  W.  HURON  ST.,  CHICAGO,  ILL. 


52 


Radio  Today 


VACUUM  TUBE 
VOLTMETER 


NET 


TO  SERVICEMEN  IN  U.S.A. 
(carrying  case  extra) 

The  most  versatile 
. . .  most  profitable 
low-priced  instru- 
ment for  dynamic 
or  channel  testing! 


Here's  what  you  can  do  with  the 
WESTON  Vacuum  Tube  Voltmeter: 


AT  A  CHECK  RF  COIL 

"  B  "  RF  GAIN  ' 

"  C  "  1st  DET.  COIL 

V  D  "  1st    "      GAIN 

"  E  "  IF  TRANSFORMER 

"  F  "  IF  GAIN 

V  G  "  2nd  DET.  COIL 


AT  H  CHECK  2nd  DET.  GAIN 
"    r        "       COUPLING  CONDENSER 

OR  TRANSFORMER 
"    J  CHECK  AUDIO  GAIN 
"■■    K        "       OSCILLATOR  VOLTAGE 
"    L         "       AVC  ACTION 


Before  you  buy. . .  be  sure  to  have  complete  information  on  this 
inexpensive  fundamental  servicing  tool !  Return  the  coupon  today. 


Weston  Electrical  Instrument  Corporation 
|      597  Frelinghuysen  Ave.,  Newark,  N.  J. 

I       Send  data  on  the  Vacuum  Tube  Voltmeter  a&  well  as  Vol.  2  of  the  helpful 
:      Weston  Pointer. 


I 


Name 

Address- 


Zity- 


JState- 


October,  1938 


53 


SOUND  MEN! 


ARE  YOU  OVERLOOKING  C.I.S.E? 


NEW  SELLING  PLAN  HANDS 
BUSINESS    BACK    TO    YOU 


It  makes  no  difference  what  your  title 
may  be — dealer,  jobber,  sound  specialist. 
If  your  business  is  selling  sound,  then  the 
C.I.S.E.  plan  is  your  dish!  It  was  planned, 
conceived  and  engineered  to  give  the 
sound  business  back  to  you  lock,  stock 
and  barrel,  enabling  you  to  meet  at  once 
all  competition — 

AND  STILL  MAKE  A  PROFIT! 


HUNDREDS  OF  SOUND  SPECIALISTS 
ARE  NOW  OPERATING  PROFIT- 
ABLY   AS    C.I.S.E.    AGENTS. 


See  ichat  free  membership  in  C.I.S.E. — the 
Clarion  Institute  of  Sound  Engineers  does 
for  you — 

1.  Gives  you  factory  purchasing 
power! 

2.  Gives  you  exclusive  selling 
territory ! 

3.  Gives  you  free  engineering  and 
consulting  service! 

4.  Gives  you  competition-smash- 
ing prices! 

5.  Gives  you  protected  profits  on 
the  fastest-selling  most  com- 
plete line  of  P.  A.  equipment  in 
the  world ! 

Several  choice  territories — fully  protected  markets — ■ 
are  still  available.  Mail  this  coupon  today.  It  will  bring 
you  complete  information  on  the  C.I.S.E.  "Sound" 
merchandising  plan.  This  will  cost  you  absolutely 
nothing.  But  remember — you  must  hurry,  your  territory 
may  be  closed  tomorrow! 


CLARION  INSTITUTE  OF  SOUND  ENGINEERS 
S?    WOOSTER    STREET,    NEW    YORK    CITY 


CLARION  INSTITUTE  of  SOUND  ENGINEERS 
6?  WOOSTER  ST.  NEW  YORK.  N.Y. 

Please  send  me  an  application  form  immediately. 
I  want  to    belong.  This,  in  no  way  obligates  me, 

RT-103B 
Name 


Address . 


|  City State 

^jmJAIIIJ.IM,l5IJd?l5llM«rfTTJ 


BROADENING  THE  SOUND  MARKET 

{From  page  52) 
Everybody  wants  it! 

F,  W.  Bell 

Bell  Sound  Systems,  Columbus,  Ohio 
A  New  Day  has  dawned  for  sound 
dealers  who  have  the  ingenuity  to  see 
the  possibilities  in  the  sound  horizon. 
Formerly  you,  as  a  sound  man,  had  to 
buck  tremendous  sales-resistance.  To- 
day motion  pictures,  radio,  and  pros- 
pective television  have  made  John  Q. 
Public  demand  his  rights.  He  wants 
to  hear  and  to  be  heard  at  every  pub- 
lic meeting — whether  it's  in  the  thea- 
ter, the  schoolroom  or  at  outdoor  gath- 
erings. 

Additional  profits 

L.  G,  Pacent 

Pacent  Eng.  Corp.,  New  York  City 
It  is  my  considered  opinion  that  all 
radio  dealers  should  put  themselves  in 
a  position  to  sell  Sound  in  all  its  di- 
versified phases.  Sound  equipment  can 
be  made  to  help  the  sale  of  more  radio 
sets  besides  providing  additional  profit 
in  itself,  which  is  needed  so  badly  in 
these  days  of  tense  competition. 

Here  is  one  way  to  keep  the  books  in 
black  ink.  Stock  investment  in  Sound 
can  be  held  to  a  minimum  without  de- 
stroying the  opportunity  to  do  business 
or  to  effect  the  necessary  turnover  to 
make  that  business  worthwhile. 


SOUND  BOOKLETS 

"Clear  as  a  bell"  sound  systems  for 
some  20  types  of  public  address  pros- 
pects are  presented  in  a  new  catalog 
issued  by  Bell  Sound  Systems,  Inc., 
Columbus,  Ohio.  Belfone  communi- 
cators are  included. 

Detailed  specifications  on  the  new 
Audak  line  of  Microdyne  Pickups,  both 
the  relayed  frequency  and  the  com- 
pensated types,  are  now  available  from 
Audak  Co.,  500  Fifth  Ave.,  New  York 
City.  Sheets  are  suitable  for  filing  in 
catalogs. 

Transformer  Corp.  of  America,  69 
Wooster  St.,  New  York  City,  has  re- 
leased through  its  Clarion  Institute  of 
Sound  Engineers  a  completely  new 
1939  fall  catalog  on  Clarion  sound  sys- 
tems and  accessories.  Lower  list  prices 
are  featured.  The  catalog  is  free  to 
those  applying  for  Institute  member- 
ship. 

Buyers  of  loudspeakers  are  offered 
information  on  "the  greatest  variety  of 
sizes,  types  and  models  ever  presented" 
in  a  new  16-page  catalog  available  free 
from  Jensen  Radio  Mfg.  Co.,  6601  S. 
Laramie  Ave.,  Chicago. 

The  "Bullet"  electric  dynamic  mi- 
crophone is  featured  in  a  new  booklet 
released  by  Tilton  Electric  Corp.,  15 
E.  26th  St.,  New  York  City.  Tilton  is 
representative  for  Transducer  Corp. 
Stands  and  accessories  are  included  in 
the  publication. 


ELECTION  *S0UND* 

THAT  YOU  CAN  USE  THE 

YEAR    ROUND 

UNIVERSITY 

REFLEXED  STORMPROOF 

SPEAKERS 


FREE 

technical     and     data 

sheets  on  the  complete 
University  line. 


YOU'RE  IN  A  HURRY 

see  your  jobber.  .  .  . 
He  undoubtedly  has  the 
SMR   in   stock!  !  ! 


UNIVERSITY  LABORATORIES 

DEPT.  RT 

195  Chrystie  Street,  New  York,  N.  Y. 


What 


RADIO 
TODAY 

do  in 
1939 


54 


A  radio  publishing 
service -not  available 
today -COMING! 


Radio  Today 


DYNATESTING  AUDIO  AMPLIFIERS 

(Continued  from  page  51) 


output  transformer  cause  the  trans- 
former to  place  a  load  on  the  tube  even 
though  the  voice-coil  circuit  is  open. 
Ordinarily  the  transformer  can  be  con- 
sidered as  imposing  a  load  resistance 
of  about  50,000  ohms.  If  the  tube  has 
an  internal  impedance  of  50,000  ohms, 
half  of  the  total  voltage  will  appear 
across  output  transformer  under  open 
circuit  conditions. 

As  stated  previously,  the  voltage 
across  the  plate  is  about  1/6  to  1/llth 
of  the  total  voltage  across  the  tube 
and  the  load.  But  with  only  half  of 
the  total  voltage  appearing  for  open 
circuit,  1/6  of  the  total  voltage  will  be 
1/3  of  the  open  circuit  voltage.  Like- 
wise 1/llth  will  be  increased  to 
2/llths  or  approximately  l/5th.  Thus 
it  appears  that  for  measurements  taken 
across  the  load,  the  load  voltage  will 
be  between  1/5  and  1/3  of  the  no-load 
voltage. 

No  load  vs.  food  voltage 

Because  of  variations  in  different 
makes  of  output  transformers,  it  is 
necessary  to  extend  the  33  per  cent 
value  to  40  per  cent.  Thus  the  actual 
range  of  values  is  20  to  40  per  cent  of 
the  no-load  voltage,  with  most  of  the 
tubes  in  use  falling  below  %rd. 

To  take  these  measurements,  the 
voltage  across  the  voice  coil  is  mea- 
sured with  the  voice  coil  opened,  and 
then  closed.  The  peak  signal  value  ap- 
plied to  the  grid  of  the  tube  should  not 
exceed  1/10  of  the  grid  bias  value  of 
the  tube;  this  small  signal  is  required 
so  that  the  output  signal  will  not  be 
distorted. 

The  voltages  referred  to  in  Fig.  2 
are  peak  values  and  should  be  multi- 
plied by  .707  to  obtain  the  r.m.s.  values 
measured  by  ordinary  meters. 

In  order  to  avoid  loading  of  the 
plate  circuit,  the  voltage  should  be 
taken  in  the  secondary  circuit  with  a 
1000  ohm  per  volt  meter.  The  volt- 
ages naturally  will  be  reduced  by  the 
ratio  of  the  turns  in  the  transformer, 
which  are  on  the  order  of  30  to  1  for 
pentode  tubes.  A  1000  ohms  per  volt 
meter  on  the  50  volt  range  in  the  pri- 
mary circuit  presents  a  paralleled 
load  of  50,000  ohms  which  may  affect 
the  accuracy  of  the  readings  on  open 
circuit  measurements.  In  the  secon- 
dary circuit,  the  loading  effect  of  the 
meter  is  decreased  by  a  factor  equal 
to  the  turns  ratio  of  the  transformer. 
If  the  ratio  is  30:1,  then  the  meter 
loading  is  reduced  to  l/30th  for  equiv- 
alent deflections  on  the  meter. 

If  it  is  necessary  to  take  measure- 
ments in  the  primary  circuit,  care 
should  be  taken  to  use  as  high  a 
voltage  range  as  possible  to  avoid  load- 
ing. Or  a  vacuum  tube  voltmeter  can 
be  used  without  regard  to  loading. 

While  it  may  appear  that  this  meth- 

(Continued  on  page  57) 


HERE  THEY  ARE! 


our  new 


BRUSH 


Business  Builders .... 


•  HL  MIKE — A  diaphragm  type  mike  with  level 
— 46  db,  it  is  excellent  for  P.A.  work,  amateur 
radio  transmitters  or  any  place  where  an  inexpen- 
sive but  efficient  microphone  is  needed.  It  features 
the  VARI-SWIV  mounting,  which  permits  the 
operator  to  take  advantage  of  its  directional  char- 
acteristics. Little  loss  with  longer  cable  lengths. 
List  price,  $23.50  with  25'  cable. 


•  D-l  MIKE — Especially  recommended  for  bet- 
ter quality  P.A.,  recording,  and  amateur  applica- 
tions, this  high  level  soundcell  type  mike  comes 
with  VARI-SWIV  mounting.  Level  —62  db  with 
a  response  from  30  to  5,500  c.p.s.  ±3  db.  Popu- 
larly priced  at  $23.50  with  25'  cable. 


•  HM  MIKE — A  diaphragm  type  mike  espe- 
cially designed  for  low  impedance  operation,  50. 
200  and  500  ohm  lines.  Its  level  is  — 46  db. 
VARI-SWIV  mounting  and  25'  cable  included — 
it  makes  a  fast  seller  for  you  at  $32.50  list.  Socket 
assembly  optional  in  place  of  Vari-Swiv,  on  all 
models. 


NEW  BRUSH  HEADPHONES 


•    BJ    HEADPHONE— A 

brand  new  model  featuring  her- 
metically sealed  headphones  en- 
closed in  rubber  jackets,  per- 
mitting good  earseal.  Excellent 
for  either  amateur  or  commer- 
cial applications.  Come  equipped 
with  all  rubber  cord.  List  price 
$12.00  per  pair. 


•  A     HEADPHONE  —  An 

ideal  headset  for  a  wide  variety 
of  commercial,  laboratory,  and 
amateur  applications.  This  set 
is  serviceable,  durable,  and  very 
light  in  weight,  only  7  oz.  Com- 
plete with  5'  cord,  list  price 
$9.00. 


THE    BRUSH     DEVELOPMENT    COMPANY 

3313  PERKINS  AVENUE  CLEVELAND,  OHIO 


BUILD  YOUR 


BUSINESS  WITH 

BRUSH 

PRODUCTS 


Please  send  me  complete  new  Brush  catalog. 

City State 

October,  1938 


55 


DISPLAYING    THE 


COMPLETE  PACKAGE  DEAL 


TAKE    A    TIP 

FROM    THESE    YOUNG 

LIVE  WIRE 
FARM  RADIO 
MERCHANTS 


THEY    SELL    FARM    RADIOS 
THE    E-Z    PARRIS-DUNN    WAY 

Say  Harold  C.  Cook  and  Charles  Pfeiffer,  graduates 
of  a  famous  radio  school:  "We  found,  in  starting 
out  in  radio  business,  that  the  service  field  and  the 
AC  radio  field  were  decidedly  flooded.  However, 
through  the  E-Z  Parris-Dunn  selling  plan,  we  dis- 
covered the  Farm  Market  to  be  the  ideal  radio  field. 
By  displaying  at  fairs,  4H  achievement  shows,  etc., 
the  Parris-Dunn  Complete  Package  Unit  illustrated 
at  the  left,  we  secured  an  unlimited  number  of  good 
prospects.  Many  of  these  were  turned  into  quick, 
4-profit  sales  by  leaving  with  them  overnight  a  6- 
volt  radio,  heavy  duty  battery  and  reading  lamp, 
thus  enabling  the  farmer  to  enjoy  electric  lights  and 
modern  radio  reception.  We  usually  found  sales 
easy  to  make  the  next  evening  when  we  returned  to 
close  the  deal.  By  following  the  E-Z  Parris-Dunn 
plan,  we  have  in  a  remarkably  short  time  built  up  a 
good  business  with  a  most  promising  future." 
We  helped  these  boys  get  started  and  we  want  to 
help  you.     Write  us  today. 

PARRIS-DUNN  CORPORATION 


20  Years  of  Successful  Manufacturing  Experience 
CLARINDA  IOWA 


BOGEN  DP  615 


"Universal" 


MOBILE  SYSTEMS 


15  WATTS 

FOR  DEMONSTRATION 
SEE 
YOUR 
JOBBER 


6  Volts  DC  and 

110  AC 
124  db  Gain 
PORTABLE 
2  INPUT 
CHANNELS 
2, 4,  9, 15  and  500 
ohm  outputs 


These  units  are 
furnished  com- 
plete with 
tubes,  choice  of 
either  Velotron 

or  Dynamic  mike  with  25  ft.  of  shielded  cable  2  12-inch  P.M. 
type  speakers  complete  with  plugs  and  10  ft.  cable.  Pro- 
vision is  also  made  for  remote  wireless  control  for  2  channels. 


SDP615D 

Complete  System 
as  described 
above  with  D7T 
Dynamic  Mike 
less  Phono  As- 
sembly. 

$140.00 


DP615VT 

Complete  system 
as  described 
above  but  with 
Model  MB-HF. 
No  voltage  Velo- 
tron Mike,  less 
Phono    Assembly. 

$140.00 


D-615 

Amplifier  only 
complete  with 
tubes  less  speak- 
ers, mike  and 
Phono    Assembly. 

$87.50 


UT-15 

Phono  Assembly 
as  illustrated 
complete  with 
Xtal  pickup 
mounted  on  am- 
plifier   cover. 

$45.00 


•   Model  SR  Remote  Control  Unit — 2  Channel  Operation — $6.75   • 

DAVID  BOGEN,  INC.,  663  Broadway,  New  York 


UNIVERSAL 
RECORDERS 


h 


" Master"   Recorder 

•  For  high  fidelity  recording  on  wax  and  all  types 
of  instantaneous  discs  such  as  acetate  and  nitrate  cel- 
lulose, gelatine  and  aluminum.  It  incorporates  an 
efficient  wax  shaving  mechanism  for  roughing  and 
polishing  wax  blanks  preparatory  to  recording. 

Universal  also  manufactures  other  models,  includ- 
ing portable,  professional  and  other  types,  full  fre- 
quency cutting  heads,  amplifiers,  recording  micro- 
phones, blank  discs,  needles,  stylii  and  complete  line 
of  other  recording  accessories. 


l4*Uu&U<U  Mi&lOflUoHe.  Go-.,  Jiid. 
INGLEWOOD,  CALIFORNIA,  U.S.A. 


56 


Radio  Today 


DYNATESTING  AUDIO  AMPLIFIERS 

(Continued  from  page  55) 


od  of  checking  the  proper  load  impe- 
dance is  subject  to  errors,  It  is  accu- 
rate enough  for  all  practical  purposes. 
In  the  first  place,  some  manufacturers 
deviate  from  the  recommended  load 
values  because  of  slight  changes  in 
operating  voltages,  and  secondly  some- 
times set  manufacturers  use  left-over 
speakers  from  previous  models  that 
are  not  intended  for  the  tube  used  in 
the  newer  model.  So  even  if  precise 
measurements  were  made,  they  would 
not  necessarily  check  with  the  recom- 
mended values. 


Practical   accuracy 

The  main  purpose  of  the  test  for 
proper  load  impedance  is  to  detect  ex- 
tremely bad  conditions  of  load  mis- 
matching. If  the  conditions  are  ap- 
proximately right,  the  performance  of 
the  set  is  usually  satisfactory.  The 
tests  given  here,  for  instance  would 
immediately  detect  the  wrong  use  of 
a  triode  output  transformer  and 
speaker  in  a  pentode  stage,  or  vice- 
versa.  In  this  way  the  serviceman 
might  discover  an  error  made  In  a 
previous  replacement  of  a  speaker  unit. 

Transformers  with  the  wrong  turns 
ratios  for  the  speaker  used  will  be  un- 
covered very  quickly  by  this  dynam- 
ic test.  Likewise,  improper  voice  coil 
impedances  will  be  detected.  And  in- 
ternal defects  in  the  transformers  and 
voice  coils  themselves,  if  serious  can 
be  located.  A  voice  coil  with  part  of 
the  turns  shorted  will  show  up  as  too 
low  a  value  of  load  impedance. 

Naturally,  the  serviceman  should 
have  checked  the  voltages  on  the  out- 
put tube  or  the  plate  current  to  see 
if  they  are  somewhere  near  the  proper 
values.  This  type  of  testing  with 
small  values  of  grid  signal  swing,  is 
quite  independent  of  minor  variations 
in  the  tube  voltages.  In  a  future  ar- 
ticle the  serviceman  will  be  told  how 
to  accurately  match  the  grid  bias  volt- 
age of  the  output  tube  to  the  load  im- 
pedance, for  maximum  output  with 
minimum  distortion.  However,  in 
order  to  avoid  matching  the  tube  to 
an  entirely  wrong  value  of  load,  it  is 
necessary  to  first  determine  that  the 
load  is  somewhere  near  correct. 


In  performing  the  work  for  dynamic  test- 
ing, instruments  made  by  the  following  manu- 
facturers have  been  used  in  Radio  Today's  lab- 
oratory: Clough-Brengle,  Hickok  Electrical  In- 
strument Corp.,  International  Resistance  Co., 
Monarch  Mfg.  Co.,  RCA  Mfg.  Co.,  Solar  Mfg. 
Co.,  United  Transformer  Corp.,  and  Weston 
Electrical  Instrument  Corp.  The  editors  wish 
to  thank  these  companies  for  their  co-operation 
in    helping    further   dynamic   testing. 


Catalog  No.  200  has  just  been  an- 
nounced by  the  Insuline  Corp.  of 
America,  23-25  Park  Place,  New  York 
City.  Complete  line  of  radio  and  elec- 
trical equipment  is  fully  illustrated 
and  described.  A  copy  will  be  mailed 
free   upon   addressing  Insuline. 


Latest  issue  in  the  bulletin  series 
being  released  by  the  Magnavox  Co., 
Ft.  Wayne,  Ind.,  is  one  which  gives  de- 
tailed instructions  for  centering  voice 
coils  in  Magnavox  speakers.  This  will 
be  sent  to  anyone  interested. 


Sales  chances  for  the  "Telfair  Tel- 
fone,"  a  voice-powered  intercommuni- 
cation system,  are  presented  in  a  new 
folder  titled  "The  Whys  and  Where- 
fores of  Privately  Owned  Telephone 
Intercommunication,"  just  released  by 
Specialties  Associates,  Inc.,  Chrysler 
Bldg.,  New  York  City. 


Universal  Microphone  Co.,  Ingle- 
wood,  Calif.,  have  issued  two  large- 
size  16-page  catalogs,  elaborately  illus- 
trated. One  of  them  features  micro- 
phones and  accessories.  The  other  car- 
ries complete  dope  on  5  types  of  re- 
cording machines,  along  with  new 
amplifiers,  accessories  and  supplies. 

Garrard  Engineering  &  Mfg.  Co.,  with 
sales  offices  at  17  Warren  St.,  New 
York,  N.  Y.,  have  issued  a  16-page 
booklet  on  their  record  playing  equip- 
ment. Products  include  turntables, 
motors,  stops,  pick-ups,  changers,  mo- 
tor grease,  needles,  etc. 


SIM 


a 


reason  why 
is  your  best 
speaker  bet! 


Precision  engineering  is  the  secret  of  Cinaudagraph's 
talk-of-the-industry  performance.  Now,  at  new  competi- 
tive prices,  the  world's  outstanding  speaker  becomes  the 
outstanding  speaker  "buy"!  You  pay  no  more -today 

'  for  the  quality,  richness  of  tone  and  long-life  depend- 
ability sealed  into  every  Cinaudagraph  unit.  Investi- 

•  gate  the  new  profit  possibilities  in  this  complete  speaker 
line  used  so  extensively  by  the  country's  foremost  manu- 
facturers of  radio  and  Public  Address  equipment.  . 

A  complete  line  for  both  indoor  and  outdoor  applications.  Electro- 
dynamics (5"  to  27"),  and  permanent  magnet  speakers  (5"  to  18") 
now  available,  Send  ior  new  catalog  to... 

CINAUDAGRAPH    CORPORATION 


DEPT.ll  K  SPEAKER  DIVISION 
STAMFORD,    CONNECTICUT 


EXPORT  DEPARTMENT 
100  VARICK  ST.,  NEW  YORK 


Unidirectional    Dynamic    D-9-T 


BACK  No  Pickup 
FRONT    Full    Coverage 

VOLUME  INCREASED 

by   Reducing   Feedback 

D9T,  List  $37.50,  High  Imp.  2  5'  Cable 
D9,  List  $35.00,   Low  Imp.  25'  Cable 

Write  jor  Catalogue  No.  29 

Manufacturers    Full    Line    Dynamic,    Crystal    and 
Carbon    Microphones    and    Stands 


AMERICAN    MICROPHONE    CO.,    Inc. 


1915  So.  Western  Ave. 


Los  Angeles,  Calif. 


I  D-S-T  Dynamic 
List  $32.50 


October,  1938 


57 


SIMPLE 
DOUBLET 


X=FUNOAMENTAL    WAVELENGTH 
IN    METERS 


MULTI-DOUBLET 


Figs.  1  to  3.     All-wave  antennas  that  are  noise  reducing  on  short-waves  only. 

BASIC  ANTENNA  SYSTEMS 

Characteristics  of  the  various  types  of  aerials  for  home  radios 


"Because  of  the  number  of  different 
types  of  antenna  kits  offered  to  the 
radio  dealer  and  his  trade,  it  is  im- 
portant to  know  the  general  character- 
istics of  the  various  types  so  that  the 
best  antenna  can  be  recommended  for 
the  particular  circumstances,"  advises 
E.  V.  Amy  of  Amy,  Aceves  and  King, 
Inc. 

The  simplest  of  all  aerials  is  the 
"straight-wire"  type  that  runs  from 
the  set  to  some  distant  point.  Usually 
this  wire  is  20  to  100  feet  long.  Most 
often  the  wire  runs  outside  to  the  high- 
est practical  point,  or  it  may  terminate 
in  a  vertical  pole.  This  type  of  an- 
tenna picks  up  signals  along  its  entire 
length,  including  the  lead-in,  and  con- 
sequently gives  noisy  operation  in  a 
noisy  location.  Of  itself,  this  antenna 
does  not  eliminate  noise.  Often,  how- 
ever, because  of  a  strong  radio  signal 
pick-up  by  the  wire,  noise  heard  in  the 
set  is  greatly  reduced.  This  apparent 
decrease  in  the  noise  is  noticed,  not 
because  the  noise  is  reduced,  but  be- 
cause the  radio  signal  is  so  much 
stronger  than  the  noise. 

Simple  doublet 

The  doublet  type  of  aerial  is  shown 
diagramatically  in  Fig.  1.  This  type 
of  antenna  is  designed  primarily  for 
short-wave  reception.  Its  operation  is 
most  effective  for  signals  whose  half- 
wave  length  is  equal  to  the  antenna. 
If   each  leg  is   one-quarter   wave  long 

(represented  by  — ),  the  antenna  will 

4 
give  best  signals  and   noise  reduction 
for    its    fundamental    wavelength     (X) 
and    odd    harmonics.     Therefore    a    50- 
meter   doublet   should    have   two   legs, 


each  12%  meters  long  or  41  feet.  For 
broadcast  reception  the  antenna  must 
be  modified  to  operate  as  a  T  type 
aerial — the  simplest  way  is  to  open  the 
ground  side  of  the  transmission  line. 
This  type  is  noise  reducing  only  on 
shortwaves. 

Doublet  antennas  can  be  made  either 
symmetrical  with  equal  legs,  or  non- 
symmetrical with  unequal  legs.  The 
systems  with  unequal  legs  respond  best 
on  two  different  wavelengths  which 
are  equal  to  four  times  the  length  of 
each  leg.  However,  the  noise  reduction 
is  usually  a  bit  inferior  to  doublets 
with  equal  legs,  because  it  is  not  sym- 
metrical. 

Set  coupler  increases  signal 

Where  it  is  desired  to  have  increased 
pick-up  on  additional  wavelengths  and 
maintain  symmetry,  multiple  doublets 
are  used  as  shown  in  Fig.  2.  Two  or 
more  doublets  of  different  lengths  cor- 
responding to  quarter  waves  of  the  de- 
sired wavelengths  are  connected  to  the 
transmission  line.  The  characteristics 
are  similar  to  those  of  a  simple  doub- 
let, except  for  increased  pick-up  on 
the  resonant  frequencies  of  the  added 
doublets  and  their  odd  harmonics.  For 
broadcast  operation,  the  antenna  must 
be  converted  to  a  T  type  aerial  with- 
out noise-reducing  properties. 

When  a  set  coupler  added  to  the 
simple  doublet  of  Fig.  1,  the  result  is 
the  system  shown  in  Fig.  3.  Usually 
the  set  coupler  is  so  designed  that  for 
broadcast  band  frequencies,  the  an- 
tenna automatically  changes  over  to 
a  T  type  antenna  without  the  use  of 
switches.  If  properly  designed,  the 
transformer    may    be    signal    boosting 


providing  a  step  up  on  broadcast  sig- 
nals. Like  the  other  doublets,  it  is 
noise-reducing  only  for  short  waves, 
and  operates  similar  to  that  of  Fig.  1 
for  shortwaves.  Multiple  doublets  also 
can  be  used  with  set  couplers. 

A  variation  of  the  doublet  with  set 
coupler  is  shown  in  Fig.  4.  In  this 
type,  for  noise  reduction  on  broadcast 
frequencies,  an  opposing  noise  signal 
is  introduced  into  the  set  coupler  to 
oppose  noise  picked  up  by  the  antenna 
on  the  broadcast  band.  The  doublet 
functions  as  a  T  antenna  for  broad- 
cast wavelengths  and  a  downlead 
counterpoise  may  be  used  to  pick  up 
the  opposing  noise.  Instead  of  a  count- 
erpoise, it  is  possible  to  pick  up  the 
opposing  noise  from  the  ground  circuit 
or  power  line  circuit.  On  shortwaves, 
the  device  functions  like  the  system 
in  Fig.  3.  By  means  of  the  counter- 
poise, when  balanced  for  noise  can- 
cellation, the  antenna  is  noise  reducing 
for  both  broadcast  and  short  waves. 

Matched  transmission  line 

One  type  of  antenna  having  noise- 
reducing  properties  for  the  broadcast 
band  is  the  type  shown  in  Fig.  5.  A 
shielded  down  lead  is  employed,  usu- 
ally with  an  impedance-matching 
transformer  to  match  the  aerial  to  the 
line  and  the  line  to  the  receiver,  and 
thereby  avoid  excessive  losses  in  the 
signal  strength  due  to  the  capacity  of 
the  shielded  wire.  Instead  of  a 
shielded  wire,  twisted  pair  may  be 
used,  one  of  the  pair  being  grounded 
and  acting  as  a  shield  for  the  other 
wire.  Ifs  noise-reducing  properties  are 
slightly  less  than  those  of  the  com- 
pletely  shielded   wire. 

(Continued  on  page  61) 


Figs.  4  to  7.    Antenna  systems  that  are  noise  reducing  on  both  broadcast  band  and  shortwaves. 


DOUBLET    WITH 
NOISE    BALANCING 
CIRCUIT 


I  w 


Initiative  —  Resourcefulness  —  Cooperation 
to  advance  the  interests  A 

oi  the  industry 


*W?"" 


w 


WHAT  ARE 
jClLL 


// 


This  Type  BT  Resistor  is  an  example  of  the  homo- 
geneous  "Metallized"  resistance  material  bonded 
to  the  outer  surface  of  a  sturdy  glass  tube  and 
encased  in  a  protective  covering. 

/JJIIIIIJII 


Voltages  up  to  100,000  at  150  watts  (and  greater) 
are  made  possible  in  the  new  Type  M  V  High  Voltage 
Resistors  by  a  spiral  formation  of  "Metallized" 
resistance  element  on  a  ceramic  base. 


RESISTORS? 


1 


,  .,*.  »#*»■*•' 


~Tn  IRC  Type  MP  High  Frequency  Power  Resistors, 
the  "Metallized"  element  is  applied  solidly  over  a 
ceramic  surface.  Excellent  characteristics  at  ultra- 
high frequencies  of  more  than  75  mc result. 


VI 


Bonded  to  a  phenolic  base  in  IRC  Controls,  th* 
"Metallized"  element  set  new  standards  for  quiet* 
nets,   smoothness   and   protection   against   moisture. 


"Metallized"  Resistors  differ  from  conven- 
tional units  in  that  a  homogeneous  film  of 
high  resistance  material  is  applied  and 
bonded  at  high  temperatures  to  insulating 
bases  of  various  types.  The  result  of  this 
process  is  a  resistance  element  of  predeter- 
mined resistance  value  and  accuracy.  This 
process,  time-tested  throughout  16  years.has 
been  utilized  and  perfected  for  seven  dis- 
tinctive types  of  resistors,  each  one  interna- 
tionally known  for  its  exceptional  quality: 

The  Type  BT  "Metallized"  Resistors,  completely 
insulated  in  phenolic,  and  the  Type  F  protected  by 
ceramic,  are  perhaps  the  best  known  for  radio  and 
high  frequency  service. 

Types  FH  and  MG,  protected  by  ceramic  or  glass, 
are  made  from  100  to  100,000  megohms  and  have 
long  been  standard  for  certain  kinds  of  scientific 
apparatus. 

The  Types  C  and  CS  (Silent  Spiral  Connector) 
"Metallized"  Controls  have  established  new  stand- 
ards for  volume  control,  tone,  and  potentiometer 
applications  wherever  radios  are  made. 
Type  MP  —  a  recently  developed  resistor  for  high 
frequency  needs — is  rapidly  solving  dummy  load 
and  rhombic  problems  for  transmitting  engineers 
in  the  ultra  high  irequency  held. 

The  New  Type  MV,  a  high  voltage  "Metallized" 
Resistor,  is  capable  of  carrying  50,000  volts  on  a 
IOV2"  *  *y%"  tube  -with  characteristics  similar  to 
that  of  a  standard  BT  unit  of  low  value.  It  opens 
new  possibilities  for  the  design  of  high  voltage 
equipment. 

The  inherent  characteristics  of  "Metallized" 
Resistors  are  stability,  low  noise  level/  uni- 
formity* non-ageing,  low  voltage  and  tem- 
perature coefficient  and  freedom  from  major 
humidity  effects. 

No  other  type  of  resistance  material  holds 
such  an  outstanding  record  of  success.  None 
holds  such  broad  possibilities  for  future 
development. 

Write  for  new  IRC  Engineering  Data 
Bulletins  Nos.  1  and  2. 


INTERNATIONAL   RESISTANCE   COMPANY 

401  NORTH  BROAD  STREET.  PHILADELPHIA.  PA. 

Factories  or  Licensees  in  Canada,  England,  France,  Germany,  Italy,   Denmark   and  Australia 

MAKERS    OF  RESISTANCE    UNITS   OF   MORE   TYPES,  IN    MORE   SHAPES,   FOR 
MORE   APPLICATIONS  THAN   ANY  OTHER    MANUFACTURER    IN   THE  WORLD 


October,  1938 


59 


J 


APPLIANCE  DIVIDENDS 


to  the  makers  of  the  Packard  Roto 
Shaver  that  idea  has  been  altogether 
successful. 


ELECTRICAL  HOLIDAY 

As  home  appliance  dealers  make 
their  plans  for  Christmas  merchan- 
dising, it  appears  that  several  new 
things  are  "in  the  cards"  this  year. 
The  1938-39  developments  are  moving 
toward  plenty  of  "gravy"  for  the  re- 
tailer. 

In  the  first  place,  manufacturers 
have  started  earlier  and  more  serious- 
ly is  helping -the  dealer  with  Christ- 
mas selling.  One  manufacturer,  who 
is  already  under  way  with  a  huge  hol- 
iday campaign,  provides  an  example 
of  the  new  technique  by  promising 
that  "it  is  going  to  whisper  into  more 
than  33,000,000  predominately  male 
ears  its  formula  for  satisfactory 
Christmas  giving — a  flower  for  senti- 
ment and  an  electrical  appliance  for 
practical  satisfaction." 

Buying  is  under  way 

Next,  a  special  improvement  in  gen- 
eral business  promises  to  be  a  factor 
this  year.  Executive  secretary  J.  R. 
Bohnen  of  the  American  Washer  and 
Ironer  Manufacturer's  Association 
reports  that  "One  large  manufacturer 
is  running .  two  eight-hour  shifts  six 
days  a  week  and  has  restored  a  5  per 
cent  wage  cut  made  five  months  ago. 
Another  reports  that  'if  anyone  had 
told  us  a  month  ago  that  we  could  get 
so  far  behind  on  orders  in  such  a 
short  period  of  time  and  that  the  tide 


New  improved  Zephr  "Healthifier"  by 
Lion  Mfg.  Co.,  2701  Belmont  Ave., 
Chicago,  in  utility  cabinet.  The  unit  cir- 
culates, washes  and  humidifies  the  air. 


Tom    Bolger    has    been    named    exec. 

secretary  of  Appliance   Dealers   Assn. 

of  Brooklyn,  N.  Y.,  with  offices  at  44 

Court  St.,  Brooklyn. 


of  dealer  interest  could  change  from 
apathy  to  such  intense  enthusiasm, 
we  would  have  said  it  was  impossible.' 
"Dealer  orders,  in  fact,  have  staged 
such  a  general  comeback  that  for  the 
time  being  some  suppliers  are  finding 
themselves  in  the  happy  predicament 
of  being  unable  to  keep  up  with  man- 
ufacturers' demands." 

More  profit 

Also,  there  is  a  tendency  toward 
higher  price  levels  this  year,  so  that 
dealers  will  consider  Christmas  pro- 
motion to  be  more  worth  the  effort. 
Here's  an  example.  According  to  fig- 
ures from  the  Vacuum  Cleaner  Man- 
ufacturers' Association,  the  average 
price  for  cleaners  for  the  first  eight 
months  of  this  year  was  $60.07,  com- 
pared to  $54.91  in  the  same  period  of 
1937. 

RAZOR  SALES  WRINKLE 

A  new  method  that  helps  dealers  to 
get  their  prospects  conscious  of  elec- 
tric razors  is  to  suggest  to  the  local 
barber  that  he  use  the  new  shavers 
rather  than  the  old-fashioned  razors. 
This  procedure  has  a  tendency  to  con- 
vince everybody  that  the  new  shavers 
are  used  and  approved  by  the  profes- 
sional whisker-cutters — the  men  who 
know  the  most  about  razors.  It  im- 
proves consumer  acceptance. 

Many  topnotch  barbers  are  already 
using  the  electric  item.  An  example 
is  the  barber  at  the  Engineer's  Club, 
in  New  York  City.  In  spite  of  the 
fact  that  the  customers  at  that  shop 
are  unusually  critical  about  mechan- 
ical efficiency,  this  barber  has  reported 


Problems  and  developments  of  the 
electrical  and  radio  industry  will  be 
discussed  at  a  meeting  to  be  held  in 
connection  with  the  National  Foreign 
Trade  Convention,  at  the  Commodore 
Hotel,  New  York  City,  Oct.  31  to  Nov. 
2.  This  electrical  meeting  will  be  held 
Tuesday  p.m.,  with  the  help  of  the 
U.S.  Bureau  of  Foreign  and  Domestic 
Commerce.  John  H.  Payne,  chief  of  the 
Bureau's  electrical  division,  will  be 
secretary,  and  John  W.  White  of  West- 
inghov.se  will  be  chairman. 

Three  sales  training  teams  of  Bendix 
Home'  Appliances,  Inc.,  led  by  Judson 
S.  Sayre,  Vernon  Calkins  and  W.  H. 
Leininger  respectively,  have  started  a 
20,000-mile  U.  S.  tour,  to  hold  50  retail 
sales  and  dealer  meetings.  Jobbers  in 
each  area  will  be  the  sponsors;  a  ?27,- 
000  retail  sales  contest  will  be  an- 
nounced. 

Norge  news  is  that  Glenn  O'Harra, 
former  sales  manager  for  ranges,  is 
now  eastern  sales  manager  for  Norge, 
and  R.  E.  Densmore,  former  refrig- 
eration sales  manager,  is  now  western 
sales  manager  for  the  firm. 

Kenneth  C.  Watson,  who  has  direct- 
ed the  advertising  of  Commercial 
Credit  Co.,  Baltimore,  has  been  named 
vice-president  and  director  of  Chester 
H.  McCall  Co.,  advertising  agency  of 
New  York  City.  With  McCall,  he  will 
continue  direction  of  Commercial 
Credit  advertising. 

At  the  Sept.  28  meeting  of  the  Elec- 
trical Appliance  Dealers  Association  of 
Brooklyn,  N.  Y.,  it  was  announced  that 
the  Brooklyn  dealer  group,  along  with 
brother  organizations  of  the  adjacent 
Manhattan,  Queens,  Staten  Island, 
Westchester  and  Bronx  areas,  was  hav- 
ing new  discussions  with  representa- 
tives of  the  chain  stores  Vim,  Davega, 
etc.  These  discussions  are  aimed  at 
further  radio  enforcement  of  Feld- 
Crawford  regulations,  as  well  as  a  sim- 
ilar clean-up  in  the  refrigerator  busi- 
ness. 


A  new  device  to  attach  to  the  register 
in  "hard  to  heat"  rooms,  for  improved 
air  circulation  —  it's  a  Deflecto  Reg- 
istair  from  Kisco  Co.,  4414  W.  Papin, 
St.   Louis.     Plugs  into  nearest  outlet. 


60 


Radio  Today 


BASIC  ANTENNA  TYPES 

(Continued  from  page  58) 

For  all-wave  reception,  some  means 
must  be  provided  in  the  coupling 
transformers  to  allow  for  operation  at 
short  waves.  Where  a  separate  chan- 
nel is  desired  for  shortwaves,  a  sec- 
ond wire  can  be  introduced  into  the 
shield  and  two  couplers  used  at  both 
the  aerial  and  the  set.  Other  modifica- 
tions are  the  addition  of  another  wire 
or  leg  to  increase  response  at  a  fre- 
quency different  from  that  of  the  main 
leg. 

Another  type  of  antenna  uses  a 
ground  at  the  antenna  transformer  and 
an  ungrounded  transmission  line  to 
the  set  coupler.  This  type  is  illustrated 
in  Fig.  6.  It  is  noise  reducing  on  all 
waves  by  virtue  of  the  transmission 
line  when  proper  transformers  are 
employed.  Instead  of  a  horizontal  wire, 
a  vertical  pole  may  be  used  with  sat- 
isfactory results. 

A  variation  of  Fig.  6  is  the  symmet- 
rical doublet  with  grounded  trans- 
former and  ungrounded  transmission 
line.  This  type  is  believed  by  some 
engineers  to  have  superior  noise  re- 
duction because  of  its  symmetrical  as- 
pects and  its  isolated  ground  circuit. 
It  is  noise-reducing  on  both  shortwaves 
and  broadcast  band. 

In  place  of  grounding  the  antenna 
transformer  separately  on  the  roof, 
many  kits  are  available  in  which  a 
ground  is  provided  by  the  central  or 
neutral  point  of  the  transmission  line 
couplers.  This  type  is  illustrated  in 
Fig.  7.  This  type  of  antenna  performs 
as  a  doublet  on  shortwaves  with  usual 
noise-reducing     properties.        On     the 


Ward's  vertical  antenna 

is    quickly    erected    on 

vent   pipe    or    wall. 


broadcast  band  it  is  also  noise  reduc- 
ing, having  an  impedance  match  be- 
tween the  aerial  and  the  line,  and  the 
line  to  the  set. 


In  many  types  of  all-wave  aerials 
having  set  coupling  transformers,  it 
is  usual  to  have  a  signal  boosting  cir- 
cuit for  broadcast  band  operation. 

Since  the  appearance  of  the  antenna 
kit  may  mean  very  little,  the  radio 
dealer  and  service  man  should  ascer- 
tain exactly  what  the  characteristics 
are.  Junction  boxes  are  not  necessarily 
antenna  transformers.  When  noise  re- 
duction is  required  for  broadcast  wave- 
lengths, the  service  man  should  be 
sure  to  install  an  aerial  having  such 
properties  in  order  to  satisfy  the  cus- 
tomer's requirements  and  maintain  the 
customer's  good  will.  In  some  cases  a 
power  line  filter  may  be  needed  to 
eliminate  noise  introduced  from  the 
power  line.  Preferably  the  filters 
should  be  located  at  the  offending  de- 
vice. 


ROD  ANTENNAS,  BETTER  LOOKING, 
QUICKLY  INSTALLED 

Better  appearance  and  ease  of  in- 
stallation are  two  points  in  favor  of  the 
new  vertical-rod  home  aerials  which 
have  caught  home-owners'  approval, 
and  may  soon  obsolete  the  old  unsight- 
ly "clothes-line"  type.  No  poles,  sup- 
ports or  guy-wires  are  needed,  and  the 
work  of  the  serviceman  or  installer  is 
greatly  simplified.  These  rod  anten- 
nas can  be  mounted  on  almost  any 
suitable  surface  or  roof  object,  such  as 
soil-pipe,  cornice,  roof-frame,  window 
frame,  etc. 

The  new  rod  antenna  introduced  by 
the  Ward  Products  Company,  Cleve- 
land,  Ohio,   is   of   nickel-plated   super- 


Going  Over  BIG! 


JUST  THE  THING  TO 
PEP  UP  HOLIDAY  TRADE! 

The  newness  —  and  practicability 
of  the  STEEM-electric  iron — make 
it  a  most  acceptable  Christmas  Gift! 

MAIL  THIS  COUPON 

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DEALERS   ARE   URGED   TO 

INVESTIGATE    THIS    REAL 

MONEY-MAKER 

STEEM-Electric  Iron  ...  a  merchandis- 
ing marvel  .  .  .  with  unlimited  possibili- 
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Line  up  with  STEEM-Electric  .... 
and  QUICK  AND  SUBSTANTIAL 
PROFITS     will     line     up     with     YOU! 

Approved    by    the    Underwriters 
Laboratories,  Inc. 


14    AMAZING     FEATURES 


•  No  sprinkling  or  rolling 

•  No  more  mildewed  clothes 

•  No  burning  or  scorching 

•  No  press  cloths  required 


•  No  constant  lifting 

•  Safe  to  fine  fabrics 

•  Safe  to  synthetic  fabrics 

•  Safe  to  heavy  woolens 

•  Rejuvenates  pile  fabrics 


•  Blocks  felts —  knitted  wear 

•  Sterilizes  as  it  irons 

•  Weight  only  6  pounds 

•  Operates  on  AC  or  DC 

•  Fully  guaranteed 


October,  1938 


61 


The  Sparkling  Jewel  of  Radio 
—  no  photo  can   do   it  justice 

KEEP  YOUR 
CUSTOMERS 

and  MAKE   BIGGER 
PROFITS   with  the 

dcUdOSt 


\\ 


5  TUBE  SUPER 

DWARF 


II 


Fits  into  the  palm  oj  your  hand 

Have  you  any  idea  how  many  customers 
you  have  lost  by  selling  them  cheap,  in- 
ferior sets?  Or  how  many  got  away  be- 
cause  you    couldn't    sell   up? 

That's  the  one  big  reason  why  Halson 
refuses   to    manufacture   cheap   sets. 

With  the  new  Halson  "Dwarf,"  you  have 
a  greater  margin  of  profit  and  you  can 
steer  your  customers  away  from  cheapness 
and  trouble.  For  only  a  trifle  more,  you 
can  sell  them  a  set  that  is 

Visibly  better 

Audibly   better 

Actually  better 

Stunning  beauty,  high  performance  and 
remarkable  tone  make  Halson's  latest 
triumph  the  great  "buy"  in  the  low  priced 
field. 

"The  Dwarf"  is  a  profit-leader.  It  is  only 
one  of  a  smart  new  line  of  table  models, 
with  big  values  in  the  best-selling  price 
brackets. 

15-tube  AC-DC  . .  .  Large 
dynamic  speaker  .  .  . 
Marvelous  tone  .  .  . 
Broadcast  and  police 
calls  .  .  .  Exclusive  new 
onyx-like  cabinets  .  .  . 
Red,  green  or  ivory,  all 
priced  the  same! 
Wire,  phone  or  write  today.  Get  ready 
for  the  big  seaason  that's  now  upon  you. 
I 


$1Q  50 


18 


LIST 


i     me     uik    seaason    tnat  s    now    upon    you. 

ALSON 

RADIO  &  TELEVISION  CORP. 

MERIDEN,    CONN. 


SERVICE  NOTES 


sized  bronze  tubing,  four  sectional,  12 
ft.  in  height.  Its  lightning-arrester 
houses  a  0.002  mfd  condenser.  Every- 
thing for  mounting  comes  packed  with 
the  antenna,  including  low-loss  porce- 
lain insulators  adaptable  to  all  ordi- 
nary roof  and  structural  conditions. 

Another  vertical  type  antenna,  de- 
signed for  use  with  a  noise-reducing 
transmission  line  and  suitable  coup- 
lers, has  been  introduced  by  Premax 
Div.,  Chisholm-Rider  Co.,  Niagara 
Falls,  N.  Y.  This  antenna  which  tele- 
scopes to  a  6-foot  length  extends  to  24 
feet.  One  type  has  a  ground  post  and 
insulator  for  mounting  in  the  ground. 
The  other  type  is  designed  for  roof 
mounting. 


HOW  THE  MYSTERY 
CONTROL  WORKS 

(From  page  31) 
voice  coil  to  ground  in  the  station  se- 
lecting positions.  A  muting  switch, 
which  connects  the  plates  of  the  out- 
put tubes  together,  is  closed  during  the 
station  selecting  operation.  The  set,  of 
course,  is  playing  during  changes  in 
volume  but  it  is  muted  as  the  second- 
ary ratchet  returns  to  its  home  posi- 
tion, and  climbs  to  the  station  dialed. 
This  means  that  whenever  any  of  the 
8  stations  are  dialed  the  set  is  muted 
as  the  secondary  ratchet  switch  turns 
the  "station  tuning"  switch  contacts. 
Failure  of  the  primary  switch  to  re- 
turn home  or  the  secondary  ratchet 
arm  to  return  home,  failure  of  the  re- 
ceiver to  mute  during  dialing  would 
indicate  trouble  in  the  stepper  assem- 
bly and  would  make  it  necessary  to 
return  it  to  Philadelphia  for  replace- 
ment. Dialing  of  an  incorrect  station, 
the  skipping  of  stations  or  the  gallop- 
ing past  of  stations  also  indicates 
trouble  in  the  stepper  assembly. 

Volume  control  assembly 

The  volume  control  and  the  on-off 
switch  are  motor  driven.  The  motor 
has  an  automatic  clutch  which  releases 
and  drops  back  as  soon  as  the  volume 
control  is  released  by  the  stepper  pri- 
mary switch.  This  prevents  "over- 
shooting" when  changing  volume  and 
immediately  stops  the  gear  train  which 
drives  the  voume  control  when  the 
volume  control  lever  is  released  on 
the  mystery  control  box.  There  is  also 
a  clutch  in  the  volume  control  itself, 
so  that  the  mechanism  will  not  jam  if 
the  volume  control  lever  is  held  down 
after  the  set  is  shut  off. 

The  primary  switch  is  a  single  pole, 
double  throw  switch  which  connects 
the  desired  winding  in  the  volume  con- 
trol motor  to  increase  or  decrease  vol- 
ume, as  shown  in  Fig.  3.  In  parallel 
with  this  switch  there  is  a  single  pole, 
double  throw  switch  connected  to  the 
manual  volume  control.  This  switch  is 
mounted  directly  beneath  the  receiver 
dial  bezel.  The  pilot  lamp  cable  is 
close  to  this  switch.  If  any  of  the  pilot 
lamp  wires  become  tangled  with  the 
switch  they  might  cause  the  motor  to 
continue  running  and  might  possibly 
cut  through  the  insulation  of  the  pilot 
lamp  lead,  causing  the  lamp  to  stay 
lit.    It  is  important  when  the  chassis 


has  been  removed,  to  check  the  loca- 
tion of  the  pilot  lamp  wiring  cable  to 
make  certain  that  it  is  entirely  clear 
of  the  volume  control  motor  switch. 

Setting  up  stations 

The  procedure  for  setting  up  sta- 
tions on  the  mystery  control  sets  is 
similar  to  the  procedure  followed  in 
setting  up  electric  automatic  tuning: 
Philcos.  except  that  the  eight  stations 
are  dialed  by  the  remote  box  instead 
of  by  pushing  the  buttons  in  the  set. 

HOW  THE  THYRATRON 
TUBE  WORKS 

Newest  addition  to  the  radio  set  tube 
family  is  the  thyratron  tube,  which  in 
principle  is  different  from  any  tube 
yet  used  in  radio  receivers.  The  thyra- 
tron itself  is  not  new,  having  been 
used  in  industrial  electronic  apparatus 
for  a  number  of  years.  The  outstand- 
ing feature  of  the  tube  is  its  capability 
to  handle  or  control  large  amounts  of 
power. 

In  its  usual  form  the  thyratron  is 
a  gas-filled  triode  and  depends  upon 
the  ionization  of  the  gas  for  operation. 
While  the  tube  has  a  grid,  this  grid 
has  an  entirely  different  control  char- 
acteristic from  the  usual  radio  tube. 
In  ordinary  tubes,  the  grid  controls 
the  amount  of  plate  current  that  flows 
in  the  plate  circuit;  and  for  changes 
in  control  grid  voltage,  the  plate  cur- 
rent changes  follow  the  grid  voltage 
changes.  Thus  for  ordinary  tubes  the 
plate  current  waveform  follows  the 
waveform  of  the  grid  voltage. 

Plate  current  not  controlled 
by  grid 

The  grid  of  the  thyratron,  however, 
cannot  control  the  amount  of  plate 
current  that  flows.  The  grid  serves  the 
function  of  preventing  the  plate  cur- 
rent from  flowing  until  the  bias  is 
reduced  beyond  a  certain  critical 
value.  After  the  plate  current  has 
started,  the  control  grid  has  no  ef- 
fect on  the  plate  current  for  DC  plate 
voltages,  regardless  of  how  it  is  varied. 
This  is  because  the  gas  vapor  has  ig- 
nited or  become  ionized.  After  ioniza- 
tion takes  place,  the  tube  operates  as 
a  gas-filled   diode  tube. 


After  the  thyratron  tube  has  ionized, 

the  grid  no  longer  has   any  effect  on 

the  plate  current. 


62 


Radio  Today 


The  only  way  to  stop  the  tube  from 
passing  a  plate  current,  once  it  has  ig- 
nited, is  to  remove  the  DC  plate  voltage. 

The  grid  of  the  tube  operates  just 
like  a  plug  on  a  high-pressure  water 
pipe.  As  long  as  the  plug  is  screwed 
in,  no  water  can  escape.  If  the  plug 
is  removed,  it  is  impossible  to  replace 
the  plug  without  first  shutting  off  the 
water.  In  the  water  analogy,  the  rea- 
son for  not  being  able  to  replace  the 
plug  is  because  the  water  pressure  is 
so  great  at  the  opening  as  to  make  it 
impossible  to  hold  the  plug  over  the 
opening.  In  the  thyratron  tube,  be- 
cause the  space  in  the  glass  envelope 
is  filled  with  gas  ions  which  can  and 
do  carry  the  plate  current,  the  grid 
is  unable  to  control  the  electron 
stream. 

Removing  the  plate  potential  on  the 
thyratron  tube  permits  the  gas  in  the 
envelope  to  go  back  to  its  un-ionized 
state.  If  at  the  time  the  plate  circuit 
is  opened,  the  control  grid  bias  is  made 
more  negative  than  the  critical  con- 
trol value  for  the  applied  plate  volt- 
age, then  the  tube  will  not  conduct 
or  ionize  when  the  plate  circuit  is  sub- 
sequently closed. 

Automatic  operation  with 
AC  voltages 

If  an  alternating  plate  voltage  is  ap- 
plied to  the  tube,  the  plate  voltage  is 
automatically  removed  from  the  tube 
for  half  a  cycle.  The  tube  becomes 
self-rectifying  and  operates  on  only  the 
positive  peaks  of  the  AC  voltage.  In 
this  way.  the  control  is  simplified  be- 
cause of  the  anode  voltage  reversal 
during  each  half  cycle.  So  with  AC, 
it  is  only  necessary  to  reduce  the  grid 
potential  below  the  critical  voltage 
and  conduction  will  cease  in  half  a 
cycle  or  less. 

Since  the  grid  of  the  thyratron  tube 
does  not  control  the  amount  of  plate 
current,  but  acts  as  a  switch  to  close 
the  circuit,  the  thyratron  tube  can  be 
thought  of  as  a  power  switch  which 
can  be  operated  by  a  very  small  volt- 
age (on  the  grid).  Incidentally,  the 
plate  current  in  the  tube  is  controlled 
only  by  the  external  resistor  and  plate 
voltage. 

The  characteristic  of  a  2A4G  type  of 
thyratron  is  shown  in  the  accompany- 
ing chart.  Note  that  as  the  plate  volt- 
age   is    increased,    it    takes    a    larger 


A  Frank  Statement 

ABOUT  THE 

New  1939  Jlnu^  Cine  "8 


Two  years  ago  we  predicted  that 
a  perfected,  low-priced  camera 
ivould  cause  the  real  swing  to 
home  movies!  Today  we  an- 
nounce the  product  that  will  do  it 
.  .  .  THE  NEW  1939  UNIVEX. 

Here  are  the  facts — 

FACT  NO.  1 — This  new  UniveX  is  fool- 
proof. It  gets  good  movies  even  in  the  hands 
of  inexperienced  users.  The  mechanism  has 
been  entirely  re-designed,  with  60  major  im- 
provements. 

FACT  NO.  2 — Four  of  these  improvements 
practically  eliminate  any  possibility  of  poor 
results.  First,  a  built-in  optical  view-finder. 
Second,  a  new  automatic  shutter.  Third,  a 
new  self-locking  hinged  cover.  Fourth,  jam- 
proof  spools.  Now  UniveX  movies  are  as 
easy  to  take  as  snapshots! 

FACT  NO.  3 — The  new  UniveX  includes 
nearly  every  essential  feature  found  in  high- 
priced  cameras.  At  the  low  price  of  $12.50, 
it  has  a  ready  market  of  millions! 

FACT  NO.  4 — Now  the  path  is  cleared  for 
widespread,  continuous  advertising!  The 
new  UniveX  Cine  "8"  at  S12.50  is  the  com- 
plete and  practical  movie  camera.  It  deserves 
the  dynamic  advertising  and  sales  promotion 
campaign  we  are  going  to  give  it.  Striking 
big-space  ads  in  the  nation  s  leading  maga- 
zines will  tell  all  America  the  story  of  the 
new  1939  UniveX — "the  movie  camera  that 
couldn't  wait  for  next  year!" 

FACT  NO.  5 — Millions  of  ads  will  stress 
that  "UniveX  is  the  smart  way  to  say  Merry 
Christmas!"  To  you  we  stress  that  "UniveX 
is  the  smart  way  to  say  Merry  Profits!" 


Fair  Trade  Protected  In  43  States! 


FACT  NO.  6 — UniveX  permits  no  lO^c  re- 
tail price  cut!  You  receive  your  full  margin 
of  profit. 

MOST  IMPORTANT  OF  ALL 

FACT  NO.  7 — For  the  first  time,  a  Movie 
Camera  makes  this  guarantee:  "Satisfactory 
movies  if  instructions  are  followed  or  a  new 
roll  of  film  free." 

And  this  insurance  guarantee  is  packed 
with  every  new  1939  UniveX  Cine  "8."  Here 
truly  is  your  answer  to  those  who  can  not 
believe  it  possible  for  a  §12.50  camera  to  get 
perfect  results! 

Universal  Camera   Corporation 

NEW  YORK  .   .  CHICAGO  .  .  HOLLYWOOD 


Check  These  Talking  Points! 

New  built-in  optical  view-finder. 
New  improved   governor. 
New  automatic  shutter. 
New  snap-lock  hinged   cover. 
Improved  F  5.6  lens,  instantly 
interchangeable. 
New  quiet,  powerful,  smooth- 
running  spring  motor. 

Just  think!  The  new  1939  UniveX  has 
all  these  important  features — and  many 
more!  And,  in  addition,  it's  the  only 
camera  in  the  world  that  uses  UniveX 
69c  Cine  film  and  takes  clear,  sharp 
movies    at    less    cost    than    snapshots! 


ONLY  1   OF  THE 

60   GREAT   NEW 

FEATURES! 


$12§o 


New  re-designed  load- 
ing mechanism.  Self- 
locking  hinged  cover 
simplifies  loading;  makes 
film  jamming  impossible 


October,  1938 


63 


*tftf°« 


***• 


unce*: 


THE  NEW  ORANGE  SEAL? 
DISC  FOR  HOME  RECORDING  • 


HERE  is  a  home  recording 
blank  that  will  make  real 
money  for  you.  The  net  price  to 
dealers  is  lower  than  that  of  any 
Presto  disc  sold  in  the  past.  The 
Presto  policy  of  dealer  protection 
and  price  maintenance  will  assure 
you  of  profitable  sales. 

The  Orange  Seal  disc  is  packed  ten 
of  a  size  in  at  attractive  three  col- 
ored carton  that  makes  an  excellent 
window  and  counter  display. 

The  Orange  Seal  disc  is  easier  for 
the  layman  to  use.  Makes  a  quieter 
record.  Gives  longer  playing  life. 
Does  not  harden  with  age.  You  can 
safely  stock  a  six  months'  supply. 

Thousands  of  Presto  owners  all 
over  the  country  are  buying  discs 
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business  in  your  community.  Clip 
the  attached  coupon  today. 


PRESTO 


RECORDING  CORP. 
137  W.  19  St.,  N.  Y.  C. 


PRESTO    RECORDING   CORP. 
137  W.  19TH  ST.,  NEW  YORK 

Enclosed   is   money    order   ["]?<•       <*■,  „r 
check   DJ    for$1*65 

Send  us  a  sample  order  of  Orange  Seal 
discs   and   display   cartons. 


Name 


SERVICING 


value  of  grid  bias  to  keep  the  tube 
from  conducting.  The  anode  or  plate 
voltages  are  plotted  in  DC  volts  or 
peak  AC  volts — likewise  is  true  of  the 
grid  potentials. 

Since  the  tube  is  gas-filled,  it  has 
a  very  low  internal  voltage  drop,  or 
or  internal  resistance.  Because  of  this 
low  internal  resistance,  it  can  handle 
a  large  amount  of  current  (power) 
without  developing  an  excessive 
amount  of  heat.  In  other  words,  the 
internal  losses  are  low. 

High   power  sensifiv/fy 

A  thyratron  tube  is  used  in  the 
Philco  mystery  control  sets  (see  page 
31).  In  this  receiver,  the  output  cur- 
rent of  the  thyratron  is  used  to  actu- 
ate a  relay  for  station  selection.  The 
tube  is  used  chiefly  because  of  its  high 
power  sensitivity. 

If  a  thyratron  is  biased  ^0  of  a 
volt  beyond  the  critical  control  volt- 
age, it  takes  only  y10  of  a  volt  to  cause 
the  tube  to  operate.  This  operating 
voltage  can  be  AC  which  instantane- 
ously subtracts  from  the  bias  volt- 
age and  causes  the  tube  to  conduct. 

If,  when  AC  is  used  on  the  plate,  as 
in  the  mystery  control  sets,  the  tube 
stops  conducting  as  soon  as  the  oper- 
ating voltage  or  pulse  has  been  re- 
moved from  the  grid  of  the  tube. 

Thyratron  tubes  cannot  ionize  and 
de-ionize  fast  enough  to  follow  radio 
frequency  impulses.  Consequently, 
when  an  R.F.  signal  is  applied  to  the 
grid  of  the  tube,  the  grid  follows  the 
envelope  of  the  R.F.  wave.  In  the 
Philco  receivers,  this  envelope  is  the 
same  as  the  pulse  caused  by  the  dial- 


SURVEY  OF  RADIO  SERVICE 
COSTS  AND  PROFITS 

In  order  to  help  the  radio  service- 
man make  profits,  Radio  Today  is  con- 
ducting a  survey  of  operating  costs  and 
profits  in  order  to  analyze  the  service 
business.  With  the  data  obtained  from 
this  survey,  Radio  Today  will  be  in  a 
position  to  show  the  servicemen  how 
to  make  greater  profits  by  overcoming 
the  weaknesses  in  their  businesses. 

The  editors  of  Radio  Today  will  fig- 
ure out  individually  each  question- 
naire submitted  and  send  each  service- 
man an  analysis  of  his  own  figures. 
Please  request  questionnaire  by  means 
of  the  coupon  below. 

Information  which  you  contribute 
will  be  treated  in  confidence  and  used 
only  for  the  compilation  of  averages. 

VINTON  K.  ULRICH,  Service  Editor, 

Radio  Today, 

480  Lexington  Ave.,  New  York,  N.  Y. 

I  wish  to  participate  in  Radio  Today's 
survey  of  costs  and  profits  in  Radio 
Servicing.  Please  send  me  a  ques- 
tionnaire so  that  I  may  send  you  fig- 
ures pertaining  to  my  costs. 

Name    


St.  and  No. 


1      City. 


I 


City State. 


ing  unit.  Thus,  during  the  entire  time 
of  each  pulse  from  the  remote  unit,  the 
thyratron  tube  is  conducting.  When 
the  pulse  has  ceased,  the  reversal  of 
the  AC  on  the  plate  of  the  thyratron 
causes  the  tube  to  de-ionize  and  be- 
come ready  to  operate  on  the  next 
pulse. 

USE  OF  THE  CHANALYST 

In  order  to  illustrate  to  the  service- 
man how  the  Chanalyst  may  be  used 
in  radio  service  work,  John  Rider  tells 
of  an  actual  service  problem  solved 
with  the  aid  of  a  Chanalyst  by  a  radio 
serviceman.  The  case  history  is  as  fol- 
lows: 

A  Graybar  receiver  after  operating 
normally  for  some  little  time,  showed 
a  lessening  of  the  volume.  Various 
checks  had  been  made,  including  a 
check  on  all  the  tubes  in  the  receiver, 
and   everything  had   stood   inspection. 

The  RF-IF  channel  of  the  Chanalyst 
was  used  to  trace  the  signal  through 
the  r-f  and  i-f  portions  of  the  receiver 
after  it  had  been  allowed  to  operate 
until  the  volume  fell  off.  All  indica- 
tions on  the  Chanalyst  showed  the  sig- 
nal to  be  normal  up  to  the  second  de- 
tector and  at  this  point  a  decrease  in 
the  signal  strength  was  noted.  Using 
the  electronic  voltmeter,  it  was  found 
that  there  was  a  slight  positive  po- 
tential on  the  grid  of  the  second  de- 
tector, which  was  unusual. 

A  by-pass  condenser,  which  might 
have  caused  the  trouble,  was  removed, 
but  the  positive  potential  on  the  grid 
persisted  and  so  it  was  decided  that 
the  trouble  lay  in  the  tube  itself,  even 
though  it  had  been  previously  checked 
in  the  regular  way.  It  was  re-checked 
in  a  tube  checker  and  again  found  to 
be  normal.  However,  as  the  trouble 
had  been  traced  to  the  tube  it  was  al- 
lowed to  remain  in  the  checker  for 
about  ten  minutes,  which  was  the  ap- 
proximate period  of  time  that  the  re- 
ceiver in  which  the  tube  had  been 
used  showed  a  lessening  of  the  vol- 
ume. After  the  ten  minutes  had 
passed,  the  tube  was  tapped  sharply 
and  the  neon  indicator  on  the  checker 
showed  a  short.  When  another  second 
detector  tube  was  used  in  the  receiver, 
the  volume  stayed  constant. 

The  ordinary  check  of  tubes  would 
not  have  indicated  anything  wrong 
and  without  an  instrument  as  sensi- 
tive as  the  Chanalyst  to  detect  signal 
loss  and  measure  voltages  without  up- 
setting the  circuit,  a  serviceman  would 
probably  spend  many  hours  of  fruit- 
less labor. 


General  Electric  Co.,  Schenectady, 
N.  Y.,  will  send  gratis  to  hams,  two  azi- 
muthal  world  projection  maps.  Mat- 
ters of  signal  paths  and  distances  be- 
tween points  have  been  simplified. 

"The  Design  of  Dummy  Loads  for 
Use  as  Speaker  Substitutes"  is  the 
subject  of  a  new  bulletin  released  by 
Wright-DeCoster,  Inc.,  St.  Paul,  Minn. 
It  is  accompanied  by  an  illustrative 
graph,  and  will  be  sent  free  on  re- 
quest. 


64 


Radio  Today 


Picked    for    president — D.    R.    Bittan, 
mfrs.    representative,    53    Park    Place, 
NYC,    now    heads    "The    Representa- 
tives." 

NEW  OFFICERS  FOR 
"THE    REPRESENTATIVES" 

For  the  year  1938-39,  "The  Repre- 
sentatives" of  radio  parts  manufactur- 
ers recently  elected  the  following  of- 
ficers: D.  R.  Bittan,  president;  John 
Porshay,  vice-president;  David  Sonkin, 
sec.-treas. 

A  new  board  of  governors  includes 
Perry  Saftler,  chairman;  Adolph  Fried- 
man, John  DiBlasi,  LeRoy  Schenck  and 
Leo  Freed.  On  the  membership  com- 
mittee are  John  Forshay,  chairman; 
John  Kopple,  Adolph  Friedman,  Perry 
Saftler  and  I.  Golden.  Committee  on 
entertainment  is  Matthew  Camber, 
chairman,  C.  B.  Cooper,  and  Jules 
Sussman. 

As  one  of  the  most  active  industry- 
builders  in  the  radio  business,  "The 
Representatives"  organization  has 
built  its  membership  to  about  135,  in- 
cluding representatives  from  all  sec- 
tions of  the  U.  S. 

RADIO  DEALERS  FAVOR  CLOSING 
JOBBER  SHOWROOMS 

"That  radio  distributors'  show  rooms 
should  remain  closed  to  consumers 
whether  or  not  they  are  accompanied 
by  dealers"  was  one  of  the  motions 
favorably  passed  by  the  members  of 
the  Radio  Dealers  Association  of 
New  Orleans,  at  a  recent  meeting. 
After  thorough  investigation,  it  was 
considered  unfair  for  small  dealers 
with  only  a  few  sets  to  take  a  customer 
to  these  showrooms  to  inspect  a  num- 
ber of  models,  while  the  large  estab- 
lished dealers  carry  big  inventories 
with  about  the  same  effect. 

Also,  the  association  went  on  record 
as  opposing  memorandum  delivery  or 
consignment;  this  kind  of  billing  is 
not  to  be  used  for  subterfuge.  All  sales 
are  to  be  bona  fide  and  not  subject  to 
return. 

The  New  Orleans  organization  in- 
cludes, besides  the  dealers,  jobbers  and 
utility  representatives.  Report  of  secre- 
tary A.  B.  Lindauer,  317  Baronne  St., 
is  that  "in  over  a  year  there  has  been 
no  violation  of  rulings  on  cut  prices, 
misleading  advertising,  or  inclusion  of 
radio  price  with  furniture  pieces,  as 
has  been  noted  in  other  cities." 


Sensational  Trouble -Shooting  Instrument 
Now  Being  Demonstrated  By  Your  Jobber 


O  How  you  can  check  any  point  in  the. 

f^JCfc     receiver,    no   matter   what   it   may   be, 
simply  by  placing  the  proper  probes 
at  the  points  under  testl 

How  you  can  determine  the  existent 
trouble,  almost  immediately,  by  merely 
moving  the  probes  from  one  point  to 


$£& 


How  you  can  conduct  any  and  every 
test  in  the  RF  and  IF  channel,  easily, 
quickly  and  accurately! 


S&& 


anotherl 

O  How  you  trace  the  passage  of  the  sig- 

J_r£r?  nal  through  the  receiver  and  establish 
the  points  where  signal  exists,  becomes 
distorted,  fades,  dies,  takes  on  hum,  without 
interfering  with  the  normal  operation  of  the 
receiver) 

How  any  and  every  check  of  the  opera- 
tion of  the  audio-frequency  channel  is 
made  with  the  use  of  a  single  probel 

O  How  the  Electronic  Voltmeter  enables 

qJ.""     you  to  measure  all  d-c  voltages  in  any 

part  of  the  receiver  by  the  use  of  only 

one  probe  in  conjunction  with  a  common  ground. 


S&£ 


O  How  the  oscillator  channel  is  checked 

^J_f£C?  by  placing  the  proper  probe  in  contact 
with  any  portion  of  the  oscillator  tuned 
circuit  and  resonating  the  channel  to  the  fre- 
quency of  the  signal  being  generated  by  the 
oscillator. 

O    j*     How  the  Intermittent  Problem  is  solved 

f^Jcf?     with  the  Rider  Chanalyst  .  .  .  How  you 

can,  in  effect,  divide  the  receiver  into 

five  separate   sections,   and   definitely   localize 

the  trouble  as  being  in  a  certain  part. 


The  multitude  of  other  tests  you  can 
conduct  with  the  Rider  Chanalyst.  It  in- 
volves no  unknown  principles  of  radiol 

This  sensational  new  instrument  dem- 
onstrated by  your  jobber. 


SERVICE  INSTRUMENTS,  INC. 

404    FOURTH    AVENUE    •    NEW    YORK    CITY 


October,  1938 


65 


SERVICEMEN  still  prefer  the 
wall  type  resistor  element  that 
hugs  the  inner  circumference  of 
the  bakelite  housing  of  the  CEN- 
TRALAB STANDARD  REPLACE- 
MENT UNIT. 

Here  are  some  of  the  reasons  Old 
Man  Centralab's  Volume  Controls 
are  the  "favorite"  with  up  and  at 
'em   Servicemen   .   .   . 

•  Maximum     resistor     length     for 
case  diameter 

•  Close     uniformity     between     re- 
sistors 

•  Accurate  tapers 

•  Uniform  current  distribution 

•  Lower     specific     resistance     and 
attendant  low  noise  level 

•  Better  potver  dissipation 

•  Longer  life. 

Available  in  standard  and  special 
replacement  types.  The  new  1938- 
39  Volume  Control  Guide  (avail- 
able at  your  jobber)  now  lists  thou- 
sands of  recommended  replace- 
ments for  all  current  and  older 
receivers. 


Centralab 

Milwaukee,  Wis. 


BRITISH    CENTRALAB,    LTD. 
Canterbury    Rd.,    Kilburn 
London    N.W.   6,    England 

FRENCH    CENTRALAB    CO. 
IIS  Avenue   Ledru-Rollin  Paris   XI,   France 


LETTERS  TO  THE  EDITOR 

(From   page  24) 

conditions,  capped  by  a  serious  war 
scare  just  as  sales  possibilities  were 
really  improving  at  Labor  Day.  have 
been  such  that  many  dealers  found 
that  all  they  could  sell  were  cheap 
compacts,  is  no  reason  at  all  why  this 
today-obsolete  belief  should  be  held  to. 
With  general  business  turned  up 
steadily  since  June,  and  only  a  bad 
one-month  interlude  during  September 
from  which  things  are  steadily  going 
forward,  it  is  imperative  for  the  dealer 
demanding  a  profit  to  realize  that  now 
is  the  time,  not  to  double  his  compact 
volume  because  sales  come  easier,  but 
to  concentrate  on  the  tremendous  dol- 
lar increase  in  his  profits  possible  from 
only  a  small  increase  in  big  set  sales. 
If  compact  sales  are  easier,  this  fact 
itself  is  living  proof  that  big  sales 
can  be  made — and  one  $200  sales  is 
worth  more  than  twenty  $10.00  com- 
pact sales. 

But  the  wise  dealer,  realizing  this 
fact  and  seeking  to  put  it  into  prac- 
tice, is  once  more  confronted  with  the 
perennial  good-times  bugaboo  of  what 
big  sales  to  work  upon.  If  he  be  but 
an  opportunist  of  today,  neglecting  his 
equally  vital  needs  of  tomorrow,  his 
course  is  simple.  He  puts  several  mod- 
els of  five  or  ten  makes  in  his  store 
and  runs  ads  saying  substantially  (be- 
cause they  are  like  every  competitor's 
ads),  "I've  got  Radios,  Too."  In  walk 
the  prospects,  and  out  they  walk  to 
"shop,"  for  every  one  of  them  knows 
that  list  prices  are  but  "asking  prices" 
— last  season's  cut-price  "dumps"  are 
too  fresh  in  their  memory.  The  old 
round  is  under  way  again — not  "how 
good"  but  "how  cheap,"  and  the  dealer 
is  once  more  faced  with  the  almost  in- 
escapable necessity  of  doing  business 
at  well  below  his  legitimate  profit.  The 
public  alone  benefits  from  his  com- 
petitors fighting  tooth  and  nail  for 
each  good  sale — when  it  is  written 
up,  the  dollar  sign  looks  nice  on  the 
sales  slip,  but  only  the  jobber  and 
manufacturer  made  a  profit — the  deal- 
er's profit  margin  is  pitifully  small,  if 
not  frequeqntly  a  net  loss. 


Horse-sense 

As  I  have  written  above,  conditions 
not  fundamentally  sound  economically 
are  self-corrective — but  usually  in  an 
individually  painful,  because  imper- 
sonal, sort  of  way.  In  this  case  one 
corrective  is  the  bankruptcy  of  deal- 
ers, jobbers  and  manufacturers  until 
supply  only  equals  demand,  and  price 
cutting  is  no  longer  necessary  to  get 
sales.  A  less  painful  way  is  the  appli- 
cation of  horse-sense — the  limitation 
of  manufacturers'  sales  and  production 
hopes  to  less  than  box-car  figures,  and 
the  cutting  down  of  each  manufac- 
turer's number  of  dealers.  Somewhat 
lessened  gross  sales  at  a  good  profit  is 
a  condition  much  to  be  preferred  to 
increased  sales  bought  at  the  expense 
of  no  profit — a  story  too  close  to  be 
true  for  the  radio  dealer  to  be  at  all 
amusing.  So  the  dealer  must  carry 
several  lines  to  be  sure  of  every  pos- 
sible sale  at  any  profit  at  all,  no  mat- 
ter how  small  competition  forces  it 
to  be. 

But  that  is  not  an  answer — except  in 
extraordinary  good  times  of  "sellers," 


not  "buyers,"  market.  As  our  experience 
here  at  "McMurdo  Silver  Corp.  has 
been  particularly  successful  in  insur- 
ing each  of  our  dealers  that  every  sale 
made  is  made  at  full  profit,  it  should 
be  interesting.  First,  we  don't  build 
compacts,  we  build  only  relatively  ex- 
pensive— and  for  the  dealer,  especially 
profitable — radios.  Quality  first,  last 
and  always  is  the  dealer's  panacea  for 
profitless  pain.  Giving  him  a  line  of 
quality  so  apparent  it  is  self-selling 
to  prospects  who  can  afford  good  ra- 
dios, demonstration  of  quality  per- 
suades them  to  buy.  To  this  we  add 
a  rigorously  limited  dealer  plan — 
never  more  than  one  single  dealer  to 
a  city.  This  plan  automatically  ap- 
peals to  the  wise  dealer,  for  it  has. 
come  into  being  through  his  demand. 
He  gets  from  it  a  line  absolutely  pro- 
tected against  price-cutting  competi- 
tion, and  of  quality  that  makes  full 
profit  sales  (yielding  never  less  than 
$100  gross  profit)  relatively  easy  to 
get  and  well  worth  going  after.  So 
enthusiastically  has  this  plan  been  re- 
ceived, and  so  successful  has  it  been 
during  a  year  of  experiment  and  trial 
confined  only  to  the  biggest  dealers  in 
the  largest  cities  that  it  is  now  being 
made  available  to  one  dealer  in  each 
city. 

Such  limitation  of  distribution  to 
the  point  definitely  conservative 
enough  to  eliminate  price-cutting  to 
get  sales  makes  compact  sales  what 
they  should  be — plus-profit  sales,  and 
is  insuring  legitimate  full  profit  on 
bigger  sales  to  every  exclusive  dealer. 
Cordially  yours, 

McMukdo  Silver. 

McMurdo  Silver   Corp.,    Chicago,   111. 

TRIPLETT   STAGES  $500 
SERVICE-PUZZLER    CONTEST 

For  servicemen  who  write  the  best 
letters  on  puzzling  service  problems 
and  how  they  were  solved  with  the  aid 
of  test  equipment,  the  Triplett  Elec- 
trical Instrument  Co.,  Bluffton,  Ohio, 
offers  prizes  of  service  equipment 
worth  $500.  There  will  be  six  awards; 
the  contest  closes  Nov.  15.  Entrants 
must  get  entry  blanks  from  jobbers. 

TERRIFIC  CELEBRATION  OF 
RCA  VICTOR'S  40TH  BIRTHDAY 

Anniversary  merchandising  program, 
as  outlined  by  RCA  Victor's  advertis- 
ing manager  Tom  Joyce,  will  include 
(1)  natipnwide  contest  to  find  old- 
est Victrolas,  (2)  promotion  of  a  new 
40th  anniversary  model  Victrola,  and 
(3)  a  feature  sales  program  on  a  con- 
sole grand  radio  to  be  sold  with  a 
special  record  album. 

Studded  with  cash  prizes,  increased 
advertising,  new  promotions  of  re- 
corded music,  etc.,  the  campaign  is 
one  which  Mr.  Joyce  has  planned  so 
that  "the  public  as  well  as  our  deal- 
ers and   distributors  will  participate." 

A  check-up  on  the  progress  of  the 
RCA  Victor  Record  Society  reveals 
that  new  members  in  all  parts  of  the 
U.S.  are  being  added  at  the  rate  of 
nearly  2,000  weekly.  RCA  has  an- 
nounced a  new  110-volt,  25-cycle  Vic- 
trola attachment  which  will  extend 
Society  activity  to  areas  having  that 
kind  of  current. 


66 


Radio  Today 


Silence 
for  Sale! 


•  Filternoys  units  reduce  or  eliminate 
man-made  static.  Every  buzz,  snap,  or 
crackle  on  a  radio  opens  the  path  for  the 
sale  of  noise  elimination  service  and  CON- 
TINENTAL CARBON  Filternoys  sup- 
pressors and  rejectors.  They  are  simple 
to  install  and  profitable  to  sell.  Types 
FOIDH  for  quieting  electric  appliances 
and  ROIDH  for  blocking  line  noise  out  of 
a  radio  are  illustrated  above.  List  price, 
SI. 00  each.     Write  for  bulletin. 


Continental  Carbon  IncM 


13910  LORAIN    AVENUE,  CLEVELAND,  OHIO 
or  Toronto,  Ontario,  Canada 


THERE'S  MORE 
SWITCHING  TO 

TANCOR 

TODAY 

THAN  TO 

ANY  OTHER  LINE 

IN  THE 

TRANSFORMER 

FIELD... 

I*  ah**"" 


STANDARD     TRANSFORMER 
CORPO  RATI  0  N 


1500    NORTH    HALSTED    ST. 


CHICAGO 


October,  1938 


67 


Positively 
Checks  Radio 
Receiving  Tubes 
According  to 
Latest 
Recommendations  of 
Tube  Engineers. 


TUBE  TESTER  Only  $21.60 


Separate  Plate  Tests 
on  Diodes  and  Rectifiers 
Neon  Short  and  Leakage 
Tests 

Ballast  Tube  Continuity 
Test 

Uses  Attractive  Triplett 
Direct  Reading  Instru- 
ment 3"  size.  (GOOD- 
BAD)   Scale 


•  Line  Voltage  Adjustment 

•  New  Improved  Low  Loss 
Switch 

Complete  in  attractive, 
sturdy  quartered-oak  case; 
suitable  for  counter  or 
portable  use.  Sloping  etched 
panel    of   silver   and    black. 


MODEL  431 $15.90 

Checks  all  receiving  tubes.  (No  ballast  test.)  Tester 
uses  dependable  Readrite  Meter.  Quartered-oak  case 
same  as  for   Model   432. 


A.C.  and  D.C. 
VOLT-OHM-MILLIAMMETER 

Sturdy  molded 
case  with  round* 
ed  corners,  acces- 
sories included. 


Pocket  s 


!     READRITE   METER 
<     1019  College  Avenue, 
i     Please  send  me  more 

□  Model    432; 

□  Send   Catalog 

WORKS 

Bluff'.on,  Ohio                            ! 

information  on                          [ 
□  Model    736;                          J 

!     City    

.State ■ 

RSA  WIDENS  SCOPE 

RSA  is  working  out  a  guarantee 
service  plan  whereby  the  public  and 
the  industry  will  be  absolutely  guar- 
anteed as  far  as  the  work  and  the  ma- 
terial which  individual  RSA  members 
use  in  the  repair  of  any  radio  set.  The 
RSA  feels  that  providing  this  type  of 
serviceman  will  result  in  a  large  in- 
crease in  business  for  its  own  mem- 
bers, and  will  be  of  inestimable  value 
to  the  public. 

The  Board  of  Directors  of  RSA  an- 
nounces that  the  annual  membership 
dues  as  of  Jan.  1,  1939,  will  be  $3,  plus 
$1  initiation  fee.  Increase  in  dues 
was  voted  in  order  to  insure  the  inde- 
pendence and  self-support  of  the  RSA. 
All  applicants  are  urged  to  send  in 
their  applications  before  Jan.  1,  to  save 
on   membership    costs. 

Chapter  news 

Allentown,  Pa.,  and  Hartford,  Conn., 
have  voted  to  affiliate  with  the   RSA. 

Alton,  Pa. — A  special  dinner 
meeting  was  held  on  Sept.  13th.  Local 
Charter  was  presented  by  Mr.  Joe 
Marty,  Jr.,  Executive  Secretary, 
RSA.  A.  G.  Mohaupt  of  the  RSA 
National  Speakers  Bureau  lectured 
on  "Test  Instruments  and  Their 
Uses."  Several  reels  of  movie  film 
were  shown. 

Binghamtoii,  N.  Y. — Planning  for 
the  coming  fall  season.  A  ladies' 
night  and  supper  meeting  is  planned 
for- early  in  November.  One  of  the 
outstanding  September  meetings  had 
Stahlman  of  Ithaca  presenting  Rid- 
er's Chanalyst. 

Dallas,  Tew — Several  meetings  in 
the  last  two  weeks.  Chapter  will 
take  full  advantage  of  the  national 
fall  program.  Under  the  leadership 
of  T.  P.  Robinson,  who  is  also  Na- 
tional President  of  the  RSA,  Dallas  is 
set  for  a  top  season. 

Chicago,  M. — Most  successful 
meeting  in  its  history  on  Sept.  2  8th, 
with  manufacturers  in  a  Round  Table 
Discussion.  Fifteen  outstanding  test 
equipment  manufacturers,  such  as 
John  Rider,  Paul  Jackson,  John 
Meek,  displayed  their  latest  test 
equipment.  Local  jobbers  in  Chicago 
cooperated  by  sending  out  invita- 
tions to  their  servicemen  lists.  This 
Test  Equipment  Show  will  become  an 
annual  feature  of  the  Chicago  Chap- 
ter of  RSA.  More  than  3  50  men  at- 
tended this  meeting.  More  of  this 
type  meeting  is  planned  soon. 

Cleveland,  Ohio — Huge  annual  pic- 
nic held  on  Sept.  2  5th.  Also  a  meet- 
ing was  held  Sept.  21st,  with  Bill 
Akers  of  the  local  Philco  distribu- 
tors giving  a  complete  story  of  the 
Philco  Mystery  Control.  The  Cleve- 
land Chapter  has  planned  for  early 
fall  a  large  number  of  interesting 
meetings,  the  first  to  be  a  talk  on 
Rider's  Chanalyst  by  two  of  the  local 
group. 

Danville — A  recent  educational  dis- 
cussion on  "Automatic  Frequency 
Control"  led  by  Mr.  Cummings. 

Dulnth,  Minn. — Jamboree  and  a 
dinner  meeting  Sept.  2  4th.  Service- 
men within  an  area  of  one  hundred 
miles  attended.  At  the  Speakers' 
Table  was  the  Mayor  of  Duluth,  the 
executive  secretary  of  the  RSA,  John 


H.  J.  Bernard  has  started  manufacture 
of  a  new  line  of  radio  test  equipment. 
For  14  years  editor  of  "Radio  World", 
he  now  has  factory  and  offices  at 
319  Third  Ave.,  Brooklyn,  N.  Y., 
where  the  new  project  is  under  way. 

Potts,  and  A.  G.  Mohaupt.  Lectures 
and  talks  after  dinner.  The  Charter 
of  the  Duluth  Chapter  was  presented. 

Metropolitan  N.  Y. — At  a  joint 
meeting  of  the  five  local  chapters  in 
the  Metropolitan  area,  Charters  weTe 
presented  to  each  group  by  Joe 
Marty,  Jr.  John  F.  Rider  was  a 
speaker  at  the  same  meeting,  empha- 
sizing the  value  of  the  RSA  and  the 
necessity  for  backing  up  the  officers. 
Problems  of  servicing  and  selling 
were  discussed  at  length;  plans  were 
laid  for  a  membership  drive,  under 
the  direction  of  Art  Rhine. 

Sept.  19th,  the  following  commit- 
tee chairmen  were  appointed:  Mem- 
bership, A.  E.  Rhine;  Grievance,  E. 
McD.  Bendheim;  Education  and 
Technical,  E.  P.  Mandeville;  Special 
Relations,  Charles  H.  Yocum;  Li- 
brary, Fred  Horman. 

The  set-up  of  the  Governing  Board 
was  completed  by  election  of  Sidney 
Bloch,  Frank  Cassidy,  Vincent  Camp- 
bell and  Joseph  Breyer. 

Preeport — Sept.  2  7th  discussion 
was  held  on  obtaining  a  larger  meet- 
ing place  for  service  meetings.  Sub- 
ject of  Chapter  Library  was  discussed 
and  plans  laid  for  such  a  position  to 
be  part  of  the  regular  chapter  set- 
up. Dale  Foy,  a  member,  gave  a 
talk  on  the  Philco  Mystery  Control, 
followed  by  a  demonstration  at  the 
local  Philco  dealer  in  Freeport. 

Green  Bay,  Wis. — On  Sept.  2  3rd 
the  Chapter  received  its  Charter 
from  the  National  Office  of  the  RSA 
and  heard  A.  G.  Mohaupt  lecture  on 
the  Signal  Generator. 

Holyoke — At  a  recent  meeting,  the 
Chapter  received  its  Charter  from  the 
National  Office  and  laid  plans  for  a 
very  active  fall  series  of  meetings. 

Peoria,  111. — First  fall  meeting 
Oct.  6th  with  a  large  turn-out.  John 
Stoll,  local  member,  held  a  very  suc- 
cessful Radio  Show  in  his  place  of 
business  Sept.  2  9th. 

Southern  N.  H. — Outing  held  by 
both  the  amateurs  and  the  service- 
men on  Lake  Sunapee,  with  games, 
swimming,  contests,  boat  races,  etc. 
Cash  prizes  were  given  each  winner. 
Recently  a  new  meeting  place  was  de- 
cided upon  at  the  Library  in  Man- 
chester. A  discussion  was  held  con- 
cerning dues  and  local  dues  cut  to 
twenty-five  cents  a  month. 


68 


Radio  Today 


JOBBERS 


Sanford  Samuel  Corp.,  distributors 
for  Admiral  radios  at  136  Liberty  St., 
New  York  City,  have  announced  that 
over  200  dealers  have  been  lined  up 
for  the  line  in  three  weeks.  According 
to  sales  manager  Charles  Ollstein  of  the 
jobber  firm,  the  dealers  in  the  area  are 
attracted  by  Admiral  1939  features, 
and  by  the  fact  that  Continental  Radio 
&  Television  Corp.  stresses  the  higher 
priced  merchandise  in  which  there  is 
more  profit  for  the  retailer.  Manager 
Ollstein  points  out  that  this  practice 
results  in  dealer  enthusiasm  for  the 
line,  and  subsequently  a  nice  volume 
of  sales  to  the  public.  He  believes  in 
the  combination  of  "a  good  line  and  a 
good  margin  for  the  dealer." 

Baldicin-Hall  Co.,  Syracuse,  N.  Y., 
are  now  distributors  for  Stromoerg- 
Carlson  in  the  central  New  York  area 
adjacent  to  Syracuse.  Fred  S.  Baldwin 
is  president;  H.  B.  King  is  radio  sales 
sales  director. 

In  the  Charleston,  "W.  Va.,  area,  the 
new  jobber  for  Stromberg  is  Charles- 
ton Electrical  Supply  Co. 

The  Stock  Boy  Cabinet  for  service- 
men, a  business  fixture  from  Hygrade 
Sylvania  Corp.,  which  is  nationally 
popular,  has  been  improved.  For  one 
of  the  large  drawers  in  the  cabinet,  a 
cash  box  is  now  available,  and  the 
other  new  feature  is  a  set  of  metal 
book  ends  which  attach  to  the  cabmet 
roof  for  holding  technical  books  and 
trade  magazines. 

A  big  Florida  radio  party  will  be 
held  Oct.  17  at  925  W.  Flagler  St., 
Miami,  where  Major  Appliances,  Inc., 
will  celebrate  their  second  birthday  in 
a  new  store.  The  firm  recently  ex- 
panded into  the  new  quarters  from  839 
W.  Flagler;  combined  sales  rooms  and 
warehouse  facilities  are  more  extensive 
at  the  new  site.  Prize  tickets  are  be- 
ing distributed  to  Florida  dealers,  to 
add  interest  to  the  birthday  event.  The 
company  distributes  RCA  instruments, 
sound  equipment  and  tubes;  Leonard 
refrigerators,  etc.  Branch  offices  are  at 
222  E.  Bay  St.,  Jacksonville,  and  at 
12th  and  Whiting,  Tampa.  George  B. 
Gray  is  sales  manager. 

Four  new  jobbers  for  Motorola  are: 
Kierulff  d  Co.,  1838  S.  Flower  St.,  Los 
Angeles,  Calif.,  for  home  sets  only  in 
southern  California;  Mills-Morris  Co., 
Memphis,  Tenn.,  exclusive  in  the  area; 
Straus-Frank  Co.,  San  Antonio,  Tex., 
where  Ray  Simpson  is  in  charge  for 
Motorola;  and  City  Service  Oil  Co., 
Bristol,  Virginia-Tennessee,  who  have 
been  re-appointed  for  western  Virginia 
and  eastern  Tennessee. 

Stoll  Radio  Co..  Peoria,  111.,  held 
their  first  annual  radio  show  Sept.  29, 
with  Admiral  radios,  parts,  sound  ap- 
paratus and  testing  equipment  on  dis- 
play. Prizes,  gifts  and  bargain  pack- 
ages of  radio  parts  were  featured. 

Announced  for  jobbers  show  rooms 
is  a  60  x  30  x  17  inches  display  unit,  de- 
signed to  show  off  seven  of  RCA's  test 
instruments.  The  unit  has  space  for 
catalogs,   as  well  as  for  wiring. 


Step  Up! . . .  Equip  Yourself  for 

More  Business 


The  NATIONAL  UNION 


Thousands  of  R;idio  Ser- 
vice Engineers  are  ag- 
gressively stepping 
ahead  for  more  busi- 
ness ;iu;iin  this  year, 
equipped  to  get  It  with 
atest  instruments. 
They're  getting  these 
instruments  free  the 
easy  X.U.  way.  Why 
don't   you  ? 


Xationnl  X'nion  provides  equipment 
to  fit  every  dealer's  needs.  You  can 
have  the  things  you  need  to  get 
more  business  free  with  purchases 
of  N.TJ.  quality  products.  Ask  now 
.   .   .   do  it  now! 

Come  on!  Build 

Customer  Confidence 

with 

NATIONAL  UNION 


Quality 
Tubes,  Condensers 


Write  for  Details 

and 

Name  of  Nearest 

Distributor 


National  Union  Radio  Corp. 

NEWARK,  N.  J.      RT-1038 


-Sell  BETTER  ANTENNAS- 

— and  don't  risk  your  reputation  with  cheap,  unlicensed  outfits. 

The  National  Antenna  Check-up  Campaign  will  stimulate  demand  for 
better  antennas.  Get  behind  it — and  be  doubly  sure  you  sell  originals; 
not  cheap  imitations.  When  your  kits  are  marked  "Licensed  by  Amy, 
Aceves  &  King,  Inc.,"  they  are  authentic  and  dependable. 
All  antenna  manufacturers  operating  under  our  patents  furnish  two 
major  types: 

1 — All   Wave  Full   Noise   Reduction, 

2 — All  Wave  Signal  Boosting,  but  not  noise-reducing  on  broad- 
cast waves. 
Be   sure   to   sell   the   right    one   for  the    job.   Full   noise-reduction   costs   a 
little  more  and  is  worth  the  cost,  but  cheap  kits  do  not  actually  provide  it. 
You  and  your  customers  are  protected  when  your  antennas  are  licensed  by 

AMY,  ACEVES  &  KENG,  Inc.,  n  west  42nd  st.,  newyork 


October,  1938 


69 


RIDER 
MANUALS 


VOLUMES 


It  takes  nine  men  to 
make  a  championship 
baseball  team 

.  .  .  And  in  radio  it  takes  all  NINE  Rider 
Manuals  to  make  a  "big  league"  outfit  of  a 
radio  servicing  business.  The  New  Rider 
Manual  Vol.  IX  will  hurl  you  right  into  the 
money  class.  This  great  Manual  gives  you 
1650  pages  of  the  most  complete  and 
authentic  compilation  of  servicing  data 
available  in  the  industry.  Thousands  of  facts 
and  easy-to-understand  diagrams  and  expla- 
nations are  given,  plus  an  entirely  new, 
64-page  "How  It  Works"  Section — the  most 
"talked  of"  feature  of  Vol.  VIII.  There  is  also 
a  140-page  easy-find  index  on  all  NINE 
Volumes,  now  containing  a  total  of  1.1,270 
pages.  You  need  the  new  Rider  Manual 
Vol.  IX  with  all  its  extra  features. 

Place  your  order  with  your  jobber  today, 

JOHN    F.    RIDER,    Publisher 

404  Fourth  Ave.,  New  York  City 

VOLUME  IX 
Out  Nov. 19th 

1650  Pages 


A  MESSAGE  TO  RADIO  PARTS  JOBBERS 

George  Barbey,  Secretary  N.R.P.D.A.,  points  need 
for  active   organization.    What  it    can  accomplish 


As  secretary  of  the  National  Radio 
Parts  Distributors  Association,  a 
number  ot  letters  have  come  to  my 
desk  asking  "What  is  the  N.R.P.D.A.?" 
"What  has  the  Association  done?" 
"Why  doesn't  the  Association  do  some- 
thing about  this  or  something  about 
that?"  etc.,  etc.  As  many  jobbers  are 
thinking  the  same  questions,  I  would 
like  to  deliver,  through  Radio  Today, 
the  following  personal  message  to  all 
Parts  Distributors: 

As  you  probably  know,  a  very  small 
group  of  jobbers  gathered  in  Chicago 
in  June,  1937,  to  start  an  organization. 
The  meetings  were  never  very  well  at- 
tended. All  of  the  work  that  has  been 
done,  has  been  accomplished  by  a 
small  group  of  earnest  men  who  are 
doing  all  they  can  to  build  an  Associa- 
tion, with  the  resources  available.  All 
of  these  men  are  so  busy  running  their 
own  businesses  and  trying  to  stay  out 
of  the  red  that  they  can  devote  very 
little  time  to  the  Association.  But  they 
have  been  planning  and  building — and 
definite  accomplishments  are  in  sight. 

The  membership  at  this  time  is  still 
small,  and  most  of  the  money  collected 
for  dues  has  been  spent  in  necessary 
legal  expenses  getting  a  charter,  con- 
stitution, by-laws,  and  for  printing, 
postage,  etc._ 

Build  membership  first 

Last  June  at  Chicago  a  ten-point 
program  for  this  year  was  adopted. 
The  first  and  most  important  project 
must  necessarily  be  a  membership 
drive,  for  without  the  prestige  of  a 
large  membership  and  sufficient  funds, 
nothing  substantial  can  be  accomp- 
lished. At  a  recent  meeting  of  the 
board  of  directors,  the  plans  for  the 
membership  drive  were  approved  and 
the  campaign  will  be  under  way  when 
this  magazine  reaches  your  desk. 

But  please  remember  that  all  of  this 
work  is  being  done  by  men  who  are 
just  as  busy  as  you  are,  with  the  added 
handicap  of  being  located  from  300  to 
3,000  miles  apart.  If  you  jobbers  really 
want  an  association  and  will  respond 
heartily    to    the    coming    membership 


campaign,  you  will  then  have  the  men 
and  the  money  to  do  the  things  that 
all  of  us  know  should  be  done.  I  am 
asking  that  you  do  not  expect  too  much 
from  the  association  before  you  have 
established  a  membership  and  a  treas- 
ury sufficient  to  open  an  office  with  a 
full  time  paid  executive  secretary  to 
do  the  work. 

The  officers  of  the  association  cer- 
tainly do  not  have  the  time  to  conduct 
a  personally  solicited  membership  cam- 
paign among  a  list  of  jobbers  scattered 
all  over  the  United  States.  If  you  job- 
bers realize  the  importance  of  this  fact 
and  join  the  association  voluntarily 
and  pay  your  dues  promptly  some  of 
our  objectives  will  be  accomplished 
this  year.  If  you  sit  back  and  wait  to 
see  whether  the  other  fellow  joins,  or 
what  is  accomplished  before  you  join, 
the  association  will  not  get  very  far. 
And  with  the  manufacturers,  sales 
managers,  representatives,  dealers  and 
service  men  all  organized,  it  is  going 
to  be  very  tough  for  a  distributors'  or- 
ganization lacking  numbers  and 
money. 

A    profitable    investment 

Last  month  Radio  Today  carried  a 
heading,  "Parts  Jobbers  Need  Help." 
We  certainly  do.  But  while  we  are 
asking  for  it  and  waiting  for  it  let  us 
remember  the  old  adage  "God  helps 
those  who  help  themselves."  And  the 
best  way  to  help  ourselves  is  to  quick- 
ly build  a  strong  association  consist- 
ing of  at  least  500  of  the  leading  dis- 
tributors, and  representing  at  least  75 
per  cent  of  the  purchasing  power  of 
the  parts  business. 

And  just  one  more  thought.  Don't 
consider  your  membership  dues  as  an 
expense.  It  is  an  investment  that  will 
bring  you  greater  returns  than  any 
merchandise  you  can  put  on  your 
shelves.  As  an  illustration  of  an  in- 
stance where  a  strong  association 
would  have  saved  you  money,  just 
recall  the  headaches  in  the  condenser 
business  during  the  past  year — a  sit- 
uation that  cost  every  small  distributor 
at  least  $100  and  the  large  distribu- 
tors more  than  $1,000.     With  the  help 


The  New  England  hurricane  didn't  blow  hard  enough  to  wreck  the  good 

spirits  of  parts  jobbers  C.  E.  Beckman  Co.,  New  Bedford,  Mass.     Left 

to  right,  M.  J.  Szulik,  P.  W.  Gifford   (manager),  shown  with  Charles 

Golenpaul  of  Aerovox. 


70 


Radio  Today 


and  cooperation  of  a  strong  jobber  or- 
ganization the  situation  could  have 
been  easily  straightened  out.  The  fact 
is  that  most  of  these  problems  will  not 
even  develop  after  the  N.R.P.D.A. 
really  represents  the  majority  of  the 
buying  power  of  the  Parts  Business. 
You  owe  it  to  the  radio  industry,  you 
owe  it  to  the  men  who  have  been  doing 
the  pioneer  organization  work,  and  you. 
owe  it  to  yourself  to  join  the 
N.R.P.D.A.  at  once. 


Geo.  W.  Russell,  sales  manager,  Sen- 
tinel Radio  Corp.,  recently  announced 
two  new  distributors  for  the  Sentinel 
AC  and  battery  radio  line.  In  Little 
Rock,  Ark.,  the  Jones  Bros.  Hardware 
Co.  will  handle  the  Sentinel  line,  and 
in  Meridian,  Miss.,  Milt.on-Broaks  Co., 
Inc.,  has  been  added  to  the  distributor 
list. 


RCA  distributors  Bruno-Neiv  York 
and  Kirch-Radisco  were  hosts  to  deal- 
ers of  the  N.  Y.  metropolitan  and  New 
Jersey  areas  in  New  York  City  re- 
cently, to  launch  the  new  phonograph- 
radio  combination  listing  at  $175  (les,s 
$40  trade-in  allowance).  RCA  execs 
Lou  Roth,  Al  Blakeslee  and  Tom  Joyce 
were  on  the  program,  along  with  job- 
bers Max  Krich  and  Irving  Sarnoff.  A 
smashing  promotion  program  for  the 
set  was  announced,  including  a  big 
cash  prize  contest  called  "Find  the 
Oldest  Victrola."  It  was  presented  to 
the  dealers  as  a  slice  of  RCA's  40th 
birthday  cake. 


Recently  named  by  Howard  Radio 
Co.  as  new  distributors  Dunham,  Car- 
rigan  &  Hayden.  San  Francisco; 
Seattle  Radio  Supply  Co..  Seattle; 
Glasgow-Stewart  Co.,  Charlotte,  N.  C; 
(Freck  Radio  it  Supply  Co.  of  Ashe- 
ville  and  High  Point,  along  with  Clinard 
Electric  Co.,  Winston-Salem,  continue 
in  respective  areas)  and  Standard 
Battery  &  Electric  Co.,  Waterloo,  Iowa. 


The  smile  is  by  Gordon  Volkenant  of 
Marshall-Wells  Co.,  Duluth,  Minn., 
but  the  fish  is  by  Ross  Siragusa  of 
Continental  Radio  &  Television  Corp. 
The  Admiral  president  landed  the  16 
lb.  salmon  at  Lake  Saganaga  in 
Minnesota. 


World's  Lowest -Priced 
Quality  Test  Units 


•     •     PUSH-BUTTON  TUBE   TESTER     •    • 


AN  up-to-the-minute  push-button 
tube  tester  and  tube  seller  for  di- 
rect readings  on  all  tubes,  both  metal 
and  glass,  AC  or  battery  types.  Tests 
for  quality,  individual  element  leakage 
(both  hot  and  cold)  ;  shorts, opens,  noise 
and  gas,  all  in  accordance  with  highest  en- 
gineering standards  for  emission  testers. 

A  line-voltage  control  is  included. 
Individual  switch  control  of  all  elements 
takes  care  of  "floating  filaments"  and 
other  non-standard  tube  arrangements. 
Extra  socket  facilities  and  other  ample 
provisions  guard  against  obsolescence. 

Fast,  accurate,  simple,  the  BERNARD  TUBE 
TESTER  uses  no  adapters. 

Large  4"  square  illuminated  meter,  with  pro- 
vision for  external  use  of  the  meter  alone  (0-1  ma) . 

Tests  include  all  the  new  tubes,  among  them 
the  new  television  tubes,  e.g.,  1851  ;  the  1.4-volt 
50  ma  and  other  battery  tubes;  gas  tubes, such  as 
2A4G,  0A4G,  884,  etc.;  ballasts,  magic  eyes  etc. 

Bernard  Tube  Tester,  Model 
387,  shipping  weight  9  lbs. 
Net  price,   with   handle-  ■  ■  ■ 


$20 


90 


The  impressive  appearance  inspires  cus- 
tomer confidence;  the  rugged  construction 
assures  dependable  service  and  long  life. 
Removable  cover  makes  same  instrument  ap- 
plicable  to    counter   or   portable    use. 


rOCKET-SIZED  5M00-OHMS-PER  \OLTER 


A  POCKET-SIZED  micro- 
1  *  multimeter,  14  ranges, 
using  a  0-200  microammeter 
of  2%  accuracy,  in  a  3" 
square  Bakelite  case,  and 
housed  in  a  black  crinkle- 
finished  cabinet,  METER- 
ETTE  JR.  is  an  accurate, 
reliable  instrument  and  the 
world's  lowest-priced  5.000- 
chms-per-volter!  The  meter 
scale  is  unusually  extended 
for    quick,    easy    reading. 

With  only  3  volts  of  self- 
contained  flashlight  battery 
{10c  renewal  cost),  resist- 
ance is  measured  all  the 
way  to  2,000,000  ohms,  and 
on  the  low-ohm  scale,  down 
to  one    ohm. 


Attractive  appearance  is  combined  with  at- 
tractive price  in  METERETTE  JR.  There 
are  only  two  controls,  a  feature  of  all  Bernard 
multimeters. 


METERETTE  JR.  provides 
the  following  ranges:  0-10- 
50-250-2.500  volts  d.c,  all 
at  5,000  ohms  per  volt; 
0-10-100-1.000  volts  a.c, 
all  at  1,200  ohms  per  volt; 
0-200  microamperes  (reads 
second  detector  diode  cur- 
rent) and  0-10-100-1,000 
milliamperes  (one  amp.) 
d.c;  0-2,000  ohms  and  0- 
2,000,000  ohms.  Bernard 
Meterette  Jr.,  Model 
3S1-J.  Shipping  weight  3 
lbs.  Net 
price  . . . 


$1Q  90 


8'Vs  INCH  MULTIMETER  WITH  REMOTE  CONTROL 


The  BERNARD  ATLAS,  with  GIANT-sized  meter, 
costs  around  $10  less  than  other  apparatus  using  a 
large    meter,   yet   ATLAS   provides   far   more   services. 


Outstanding  in  both  price  and  performance, 
the  Bernard  Atlas  uses  a  meter  so  large  you 
can  read  it   at  a  distance. 


Unusual,  highly-desired  ranges  are  included,  e.g.,  150 
millivolt  a.c.  output  meter  for  connection  across 
voice  coils,  so  receivers  may  be  aligned  before  the 
a.V.C.  Starts.  You  can  see  bejore  you  can  hear. 
The  tiniest  hum  can  be  read  directly.  One  selector 
switch,  one  combination  ohms-mfd. -henry  adjuster, 
only  two  input  posts.  Meter  hangs  on  wall,  stands 
on  shelf,  lies  flat  or  stands  upright  on  bench. 
RANGES:  0-10-50-250-500-2500  volts  d.c,  all  at 
1,000  ohms  per  volt;  0-1-10-100-1,000  ma  (one 
amp)  d.c;  0-40  ohms  (5  ohms  center,  reads  directly 
to  .2  ohm);  0-400-25,000-250,000  ohms,  with  self- 
contained  battery;  0-2,500.000  ohms  with  external 
45-volt  battery  (not  supplied);  0-150  millivolts  a.c 
output  meter;  0-15-150  volts  a.c.  output  meter  (con- 
denser self-contained);  0-15-150-1,500  volts  a.c; 
(00.2-.2  mfd.)  (.02-2  mfd.)  (1-100  mfd.);  (.07-7 
henries)  (3.5-350  henries)  (35-3,500  henries;  0-150 
watts  for  a-c  line,  0-1.3  amperes  a.c;  3  db  ranges, 
—10  to   +58. 

Model    388    Giant     Multimeter,  0  0%  f%  Qfl 

the     Bernard     Atlas;     shipping 
weight  6  lbs.     Net   price 


29! 


Treasure  at  the  Price  of  Trash 

See  Your  Jobber  or  Write  for  Catalogue  "T" 


Ip->.  See  Tour  Jobber  or  Write  for  Catalogue     T  ■  r— -^ 

D  IE  R  |\  A  R  ID 

H.  J.  BERNARD,  319-T  THIRD  AVE.,  BROOKLYN.  NEW  YORK 

Export  Representatives  Pan-Mar  Corp.,  1270,  B'way,  New  York,  N.  Y.  USA 


October,  1938 


71 


NEW  BOOKLET 


The  Institute  of  Radio  Engineers, 
with  headquarters  at  330  W.  42nd  St., 
New  York  City,  have  published  three 
new  booklets  on  radio  standards,  at 
50c  per.  Covered  separately  are  "Radio 
Receivers,"  "Electroacoustics"  and 
"Electronics." 

More  business  and  better  business, 
with  prompt  increase  in  profits,  is  the 
theme  of  the  new  102-page  sales  man- 
ual provided  for  jobbers  and  jobber 
salesmen  by  National  Union  Radio 
Corp.,  57  State  St.,  Newark,  N.  J. 


4tttt& 


NEW  CATALOG  #161 

JUST  OFF  THE  PRESS 

May  we  send  you  a  copy? 


CORNELL  -  DUBILIER 

/S^.  ELECTRIC    CORPORATION 

(iCXm  10ZZ  Hamilton  Blvd., 

^S§7  So.  Plainfield,  N.  J. 

"""..  Cable  Address:  "CORDU" 


Special  presentation  of  the  Cornell- 
Dubilier  line  of  capacitors  is  found  in 
a  new  type  catalog  now  available  free 
from  CD  at  1000  Hamilton  Blvd., 
South  Plainfield,  N.  J.  Many  of  the 
capacitor  types  in  this  elaborately  il- 
lustrated 40-page  book  are  new.  Large 
pictures  accompany  the  lists  and  de- 
scriptions, in  a  plan  which  makes  the 
matter  easy  to  read  and  convenient 
for  the  reader  who  looks  for  a  par- 
ticular item. 

"Test  Standards  for  Condensers"  is 
an  8-page  booklet  with  dope  on  when 
to  replace  condensers  and  how  to  tell 
which  brand  is  best,  just  prepared  by 
John  Meek  Instruments,  164  N.  May 
St.,  Chicago,  111.  The  booklet  is  free 
to   those   writing  on   letterheads. 

For  engineers  and  manufacturers  of 
radio  and  electrical  equipment,  a  fre- 
quently-issued series  of  bulletins  are 
available  from  Clarostat  Mfg..  Co.,  Inc., 
285  N.  Sixth  St.,  Brooklyn,  N.  Y.  For 
this  data  on  resistors  and  resistancce 
devices,  loose  leaf  binders  are  issued. 

"How  to  Choose  a  Radio"  is  a  20- 
page  booklet  issued  for  customer  dis- 
tribution by  Stromberg-Carlson.  What 
prospects  should  consider  is  carefully 
outlined  in  material  accompanied  by 
special  nictures. 

A  "new  way  to  health"  via  short 
waves  is  described  in  a  new  catalog 
issued  by  Scientific  Diathermy  Corp., 
200  W.  34th  St.,  New  York  City.  The 
firm's  new  portable  diathermy  machine 
for  home  use  is  included. 

Detailed  information  on  all  Atlas  re- 
sistors from  the  5-watt  pigtail  to  the 
200-watt  transmitting  size  is  carried 
in  a  new  catalog  No.  9,  available  on 
request  from  Atlas  Resistor  Co.,  423 
Broome  St.,  New  York  City. 


"Inventory  Control — A  Buying  Guide 
to  Profits"  is  the  title  of  new  bulletins 
released  by  Hytron  Corp.,  76  Lafayette 
St.,  Salem,  Mass.  Detailed  data  on 
tube  turnover  is  presented. 

Announcing  and  explaining  the  spe- 
cial annual  release  of  European  Red 
Seal  records,  a  24-page  booklet  has 
been  released  by  RCA  Victor  to  help 
dealers  merchandise  the  disc  sets.  Pre- 
pared by  Peter  Hugh  Reed,  it  has 
notes   on  each   recording. 


Jaixette/  Ttotaru  Converters 


FOR  CONVERTING  D.C.  TO  fl.C. 

•  Built  especially  for  r?dio  and  sound  apparatus — cap- 
acities 110  to  32S0  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service — 
used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus  throughout  the  world  • 
WHY  EXPERIMENT  —  INSIST  ON  fl  JflNETTE 
ASK    FOR    BULLETIN   13-1 


Janeite  Klanu&durinqr  Company 

556*558  lUestltlonwe  Steeet  eKica^o,  IH.TI.S.JI. 


Annual  Radio  Parts  Catalog — No. 
1038R — has  been  issued  by  L.  C.  Brach 
Mfg.  Corp.,  55  Dickerson  St.,  Newark, 
N.  J.  It  includes  new  designs  in  home 
and  multiple  antennas  and  accessories, 
auto  aerials,  and  miscellaneous  special- 
ties; an  electric  fence  controller  is  also 
offered.  The  catalog  is  free  to  readers. 

Ideas  for  the  selection  of  gifts  for 
all  members  of  the  family,  and  for  all 
occasions,  are  elaborately  presented  in 
a  new  64-page  rotogravure  catalog  re- 
leased by  Wholesale  Radio  Survey 
Co.,  100  Sixth  Ave.,  New  York  City. 
Item  is  free  from  headquarters  or 
from  branches. 

Complete  presentation  of  trans- 
former components  is  now  available 
from  United  Transformer  Corp.,  72 
Spring  St.,  New  York  City,  or  from 
jobbers.  Includes  new  Ouncer  series, 
Varitran  voltage  control  units,  trans- 
mitter and  amplifier  kits;  transform- 
ers for  broadcast,  aircraft,  industrial, 
amateur  and  replacement  service. 

A  new  1938  vertical  home  antenna, 
with  universal  bracket,  is  featured  in 
a  new  catalog  supplement  issued  by 
J.  F.  D.  Mfg.  Co.,  4111  Ft.  Hamilton 
Parkway,  Brooklyn,  N.  Y.  Phono 
pickup  coils  and  dampers,  field  coils, 
ballast  tubes,  resistance  line  cords,  un- 
breakable test  prods,  etc,  are  included. 

"Vipower"  is  the  title  of  a  new  il- 
lustrated bulletin  released  by  The  Ra- 
diart  Corp.,  Shaw  Ave.  at  133rd  St., 
Cleveland,  Ohio.  It  has  complete  data 
on  "Vibrator  power  at  its  best — and 
most  powerful." 

Loose  leaf  sheets  on  the  new  mi- 
crophones of  Universal  Microphone 
Co.,  Ltd.,  Inglewwood,  Calif.,  are  now 
available  in  a  new  series. 

A  new  circular,  No.  507,  has  been 
released  by  Ward  Leonard  Electric 
Co.,  Mt.  Vernon,  N.  Y.  It  includes  in- 
formation on  a  new  product,  the  "para- 
sitic suppressor,"  besides  listings  of 
wire  wound  resistors,  vitrohm  ring 
type  rheostats,  adjustohm  resistors 
and  plaque  resistors. 

A  new  folder  on  electrolytic  and 
paper  condensers  has  been  released  by 
American  Condenser  Corp.,  2508  S. 
Michigan  Ave.,  Chicago,  111. 

Illustrated  catalog  with  16  pages  on 
"Temco  Transmitters  for  Every  Re- 
quirement of  Amateur,  Commercial  and 
Experimental  Communications  Ser- 
vice" has  been  issued  by  Transmitter 
Equipment  Manufacturing  Co.,  Inc.,  130 
Cedar  St.,  New  York,  N.  Y. 

Enlarged  catalog  on  Ohmite  Rheo- 
stats and  Resistance  Units  for  the  In- 
dustrial, Radio  and  Electronic  fields  is 
now  available  from  Ohtnite  Mfg.  Co., 
4835  W.  Flournoy  St.,  Chicago,  HI. 
Complete  tables  of  ratings  and  a  long 
series  of  values  in  this  booklet  No.  17 
make  selection  an  easy  matter. 

Smartly  styled  pocket-size  salesman's 
book,  for  customer  distribution  or  for 
counter  use,  has  been  prepared  by 
Stromberg  -  Carlson.  Special  illustra- 
tions and  descriptions  are  given  for 
all  SC  1939  sets  and  features. 


72 


Radio  Today 


V,       too,"""'  ^es""'* 

Ve  ^0SS£S 


*# 


M* 


..Vs'. 


,VX 


w 


oft" 


■ 


/ 


The 

MUSIC 
SCOOP 


YEAR 


Write  for  de- 
tails of  this 
magnificent  in- 
strument and 
complete  line 
of  portable 
com  b inations, 
etc. 


PORTABLE  AUTOMATIC 
ELECTRIC  PHONOGRAPH 

Plays      and      changes      10     or      12     inch 
records     automatically.       Unbe-     mqaca 
lievable    tone.      S    unusual    fea-     i^5r SI 
tures.     AC-DC List  Prfci 


THE   PORT-0-MATIC   CORPORATION 


1013  MADISON  AVE. 


NEW  YORK  CITY 


Sales  Offices:  Atlanta      •      Chicago      •      Dallas      •       Denver      •      Detroit 
Kansas   City   •    Los  Angeles   •   New  York   •    General  Offices:   Newark,  N.  J. 


October,  1938 


f         yXW   IT 

y  V 

fat  CUw  I*' 

Your  work  must  stand  up  if  you  expect  to 
make  prompt  collections.  The  sure  way  is  to 
use  dependable  Ward  Leonard  Replacement 
Parts.  They  are  made  right  and  are  conserv- 
atively rated.  Send  for  the  Servicemen's  Data 
Sheet  and  Price  List. 

WARD  LEONARD  ELECTRIC  CO. 

40  SOUTH  STREET,  MOUNT  VERNON,  N.  Y. 
Please  send  me  Price  List  Circular  507-A. 

Name  

Address 

City State 

Jobber's  Name 

73 


ytuteAttifofe  ^Uu  New 
"EVEN  SPEED"  PHONOGRAPH  MOTOR 

THE  new,  more  compact  Alliance  "Even  Speed"  motor  is 
way  ahead  of  anything  in  its  field.  Alliance  engineers  have 
eliminated  the  need  of  a  governor  yet  the  "Even  Speed"  motor 
maintains  constant  speed  regardless  of  variations  in  record  drag, 
line  voltage  or  operating  temperature.  Large  bearings  with  ample 
oil  reserves  and  laminated  bakelite  helical  cut  gears  assure  a  long 
life  of  smooth,  silent  operation.  The  "Even  Speed"  motor  (110  volt- 
60  cycle)  is  available  with  9",  10",  or  12"  turn-tables  and  is 
furnished  complete  with  5'  cord  and  rubber  spools  for  mounting. 
Write  today  for  sensational  low  prices  and 
more  complete  information. 

ALLIANCE    MFG.    CO. 

ALLIANCE,    OHIO 


NO  BALLYHOO 
NO   FANCY 
DEALS  BUT 


MORE 

PROFIT 


Triad  "peaked"  tubes  not  only 
give  you  a  larger  installation 
profit  but  they  cut  down  un- 
profitable call   backs. 

Pre- tested  elements  and  rigid  inspection  and 
intermediate  tests  make  TRIAD  a  uniformly 
long  life  tube  that  must  satisfy!  No  wonder 
TRIAD  Tubes  are  initial  eguipment  with  over 
20  leading  set  manufacturers. 

DEALERS !     SERVICEMEN ! 

Write  For  Oar  New  Profit  Making  Proposition  ! 


THE  QUALITY  NAME 


IN    RADIO    TUBES 


MANUFACTURING   CO.,  INC. 
PAWTUCKET,   RHODE   ISLAND 


DO  IT  NOW  A 


*DUES  WILL  BE  INCREASED  JANUARY  1,  1939 
$1.00    of   1938    dues    will    be    credited    on    1939   dues 
if  you  join  before  January  1,  1939. 


i 

-  *  *  +  *  *JZo*  *«**TZ~  Qi  ^«',ci-  t 

1    \\,«M**  State- ■■•" 


^^rtOeorbo^^- 


1 

t 


-  *dd<*55 


..-■■■-:    ,toca\^apW  \ 

,e  \„  Does  VP"  —  tf»  ^ 


Servicemen  must  keep  abreast 
of  the  times.  Membership  in 
RSA  helps  servicemen  to  be 
better  business  men.  It  pro- 
vides advance  technical  in- 
formation, it  lets  you  know 
what  other  servicemen  are 
doing,  it  provides  an  organiza- 
tion composed  only  of  quali- 
fied servicemen,  its  member- 
ship reaches  every  state  in  the 
union,  it  has  the  sponsorship 
and  backing  of  the  entire 
industry.  We  want  you  as  a 
member  if  you  are  a  good 
serviceman. 


The  best  $2.00 

YOU  EVER  INVESTED 


RADIO  SERVICEMEN  OF  AMERICA,  INC. 

Joe  Marty,  Jr.,   Executive  Sec'y,   304  S.  Dearborn  St.,  Chicago 


74 


Radio  Today 


SALES  AID 


TRIPLE  APPEAL 


Three  new  die  cut  displays  printed 
in  red,  yellow,  blue  and  black,  have 
been  prepared  by  Triad  Mfg.  Co.,  Paw- 
tucket,  R.  I.,  and  are  available  from 
the  Sales  Promotion  Dept.  there,  or 
from  Triad  jobbers. 

Largest  of  the  three  is  for  window 
or  floor  use,  14"  x  17".  The  second  is 
suggested  for  counter  use,  and  the 
third  is  the  Triad  dealer  authorization 
notice. 


FRESH   DISPLAYS 


Pour  window  cards,  a  window  trim 
set  of  three  streamers,  and  four  other 
pieces  of  smaller  design,  are  included 
in  a  brand  new  series  of  point-of-sale 
display  materials  now  available  from 
Ken-Rad  Tube  &  Lamp  Corp.,  Owens- 
boro,  Ky.  Jobbers  and  dealers  will  find 
the  whole  set  lithographed  in  lively 
colors. 


A  CHEER  FOR  TUBES; 
NOVEL  SALES  HELP 

A  lively  8-color  window  display,  fea- 
turing RCA  Radiotrons  and  their  con- 
nection with  the  football  season,  Is 
now  available  to  dealers.  A  large 
9-sheet  football  schedule  pad  is  at- 
tached, presented  so  that  dealers  will 
find  it  convenient  to  stage  prediction 
contests  among  customers. 


Another  football  display,  also  ap- 
propriate for  contests,  plugs  Cunning- 
ham tubes  in  an  8-color  piece  depicting 
a  tense  moment  in  gridiron  scrim- 
mage. 

Among  other  RCA  merchandising 
helps  is  a  noise-generator  kit  which 
will  allow  dealers  and  servicemen  to 
show  customers  the  tangible  results 
of  using  the  Master  Noise  Eliminator 
and  the  Master  Antenna  System. 

Also,  papier-mache  reproductions  of 
the  famous  terrier,  Nipper,  have  been 
prepared  by  RCA  for  store  or  window 
use.  The  40-inch  figure  has  concealed 
loudspeakers  so  that  broadcasts  or 
records  may  be  played  through  it. 

"SHE  WAS  ONLY  A  FARMER'S 
DAUGHTER" 

Booklets  containing  one-act  plays, 
with  appropriate  titles  like  the  one 
above,  are  being  offered  by  Presto  Re- 
cording Corp.,  139  W.  19th  St.,  New 
York  City,  along  with  home  recording 
machines,  or  with  blank  records. 

It  was  found  that  one  of  the  newest 
forms  of  home  entertainment  is  the 
recording  of  short  dramas,  where 
groups  of  people  are  in  the  mood  for 
special  fun.  A  microphone  is  placed 
in  the  center  of  a  family  group  or 
among  party  guests,  and  the  "players" 
read  their  parts.  The  complete  record- 
ing of  the  production  can  then  be 
played  back. 

BLACK-AND-60LD  SALESMEN 

Attached  to  the  control  knobs  of 
Stromberg  Carlson  radios  now  being 
shipped  are  a  series  of  new  tags,  ex- 
plaining for  the  prospect  and  for  the 
salesman  the  various  features  of  the 
sets.  The  tags  are  designed  to  attract 
those  who  browse  around  in  radio 
shops;  they  offer  an  unforgettable 
sales  summary  for  everyone  concerned 
in  marketing  the  set.  Tags  are  illus- 
trated and  printed  in  black  and  gold. 


NEW  NEON 


A  modern  style  neon  sign  with  green 
and  blue  tubes  has  been  introduced  by 
Stromberg-Carlson  for  identifying  au- 
thorized dealers.  The  words  used  are 
Stromberg-Carlson  Labyrinth  Radio. 


TRAFFIC-STOPPER 


*  One  part  of  Zenith's  store 
display  service  on  auto  radio  is  a 
series  of  adhesive  posters,  sent  out 
to  dealers  with  a  white  protective 
backing  which  is  stripped  off  when 
used.  These  "Mystik"  pieces  come 
in  nine  different  designs,  forming 
a  set  of  colored  displays  presented 
as  a  new  device  to  stop  traffic  and 
get  prospects  into  the  store. 

Zenith  suggests  that  the  stickers 
be  used  in  the  following  plan:  (1) 
Install  a  new  1938  auto  radio  in 
your  car,  (2)  Have  your  car 
washed  and  polished,  (3)  Place 
the  "Mystik  Markers"  on  both 
sides  of  the  car,  (4)  Park  your 
car  in  front  of  your  store,  ( 5 ) 
Open  the  car  windows  and  turn 
the  volume  up  so  that  the  radio 
may  be  heard  by  passers-by. 


tev 


**c 


UWOLCSflLC  RADIO  SEfiVICC  EE 

lOO  SIXTH  AVE.,  NEW  YORK,  N.  Y. 

CHICAGO,  ILL.    •     ATLANTA,  GA.    •     BOSTON.  MASS. 


FLASH! 

To  JOBBERS  and  DEALERS— 

YOU  CAN  SELL  THE 
SENSATIONAL   NEW 

RALSTON  CODE  COURSE 


without  investment! 


•  Take  advantage  of  the  ever-widening 
world  of  hams,  the  growing  public  in- 
terest in  their  work  and  the  present 
boom  in  record  players  and  combinations. 
This  new  method  of  learning  the  code, 
or  increasing  speed,  is  complete  in  three 
double  side  records  with  accompanying 
instruction  book.  Signals  are  clear  and 
crisp;  slow  or  fast  as  desired — and  play- 
able on  ANY  phonograph  or  record 
player. 

Demonstrated  at  the  ARRL  National 
Convention  in  Chicago,  the  Ralston  Code 
Course  took  the  hams  by  storm.  Thou- 
sands who  have  hesitated  to  begin  can 
now  learn  in  half  the  time,  under  the 
recorded    teaching    o  f    experts. 

As  an  introductory  measure,  we  will 
supply  a  limited  number  of  dealers  on 
a  straight  consignment  basis.  You  can't 
lose.      Write    today    for   complete    details. 

RALSTON  RECORD   COMPANY 

5433  Willows  Ave.,  Philadelphia,  Pa. 

Subsidiary  of  Poinsettia,  Inc.,  Pitman,  N.J. 


October,  1938 


75 


NEW! 

r  WARD'S  DE  LUXE 
HOME  AERIAL  MAST 


*  Can  be  sold  to  replacement  mar- 
ket as  well  as  with  new  sets 

•  Provides  better  reception,  better 
pickup  than  old  style  "clothes- 
line" aerials 

•  Made  of  attractive,  rustproof, 
nickel-plated  bronze  tubing;  4 
sectional;  12  ft.  high 

•  Easy  to  mount  to  soil  pipe,  or 
against  chimney,  window  frame, 
garage,  etc. 

FREE !  Write  today  for  free  catalog 
of  WARD'S  complete  line  of  aerials 
for   car   and   home. 


TOWARD  PRODUCTS  £»/>. 

WARD   BUILDING  CLEVELAND,   OHIO 


Halldorson 

^'^Transformers 


Two  Models 
Fit  1250  Receivers 

Do  You  Know  that  eight  Hall- 
dorson models  will  take  care  of 
all  replacement  demands  for 
both  power  and  audio  trans- 
formers in  more  than  90%  of 
all  makes  of  radio  sets? 
For  better,  more  satisfactory  re- 
sults, specify  Halldorson. 

Ask  Your  Jobber 

Write  for  New  Catalog 


The 

VARI-VOLT 

Exclusively 

HALLDORSON 

0  to    256   v.    in 

1  -volt  steps; 
0-128  in  y2-volt 
steps.  -Simplifies 
radio  service 
work. 

PREE  to  Servicemen 
on  Halldorson 
Deal 


THE   HALLDORSON   CO., 
4500  Ravenswood  Ave.,  Chicago,  III. 
Please  send  me — 

□  New  Catalog: 

□  Information   on  Free  Vaii-Volt   Deal. 

Name    

Address    

City    

State    


O  c, 


Ktrf#il 

■ .  [MM 


Tangible  returns  are  reported  by  New  Orleans  Auto  Supply  Co.  as  a  result  of 
formal  sales  training  of  personnel.  The  course  came  from  LaSalle  Extension 
University,  Chicago.  Starting  at  third  from  left,  front  row,  left  to  right,  are  the 
executives,  J.  L.  Schultz,  Louise  Shedler,  president  R.  E.  Zerlin,  Archie  Kiefsky,  J. 
McVickers    (LaSalle)    and   N.   H.   Palmer.     Others   are  salesmen   who  took   the 

training. 


TALK  OF  THE  TRADE 


McMurdo  Silver  Corp.,  Chicago,  111., 
makers  of  custom-built  radios,  in  line 
with  its  policy  of  never  more  than  one 
dealer  to  a  city,  has  just  appointed 
Famous-Barr  exclusively  for  the  St. 
Louise  trading  area,  and  Shryock  Radio 
Co.  likewise  exclusively  for  Philadel- 
phia. A  quick  check  of  Philadelphia 
activity  on  McMurdo  Silver  showed 
that  Shryock  during  the  twenty  days 
immediately  following  their  appoint- 
ment just  after  Labor  Day  sold  about 
$2,500  of  these  custom-built  radios  and 
combinations,  all  without  a  single  ad! 
Joseph  Hergesheimer,  famous  novelist, 
was  among  their  first  customers — 
while  Lyon  &  Healy  out  in  Chicago 
are  reported  to  have  just  sold  a  Mc- 
Murdo Silver  to  Rudy  Vallee.  Which 
seems  to  prove  the  maker's  contention 
that  "thar's  gold  in  them  thar  expen- 
sive radio  sales"  when  the  line  is  ex- 
clusive. 

F.  Behrendt  of  Recoton  Corp.,  178 
Prince  St.,  New  York  City,  has  re- 
turned from  a  2-month  tour  of  Eng- 
land, Holland,  France  and  Switzerland. 
Mr.  Behrendt  made  a  study  of  record- 
ing processes  and  recording  equipment, 
and  will  shortly  market  a  new  record- 
changer  here.  Meanwhile  he  has  an- 
ounced  additional  merchandising  helps 
for  dealers  handling  the  highly  success- 
ful Recoton  phonograph  needle. 


Radio  GruiJd  of  Indiana,  with  28 
members  under  the  direction  of  secre- 
tary Joe  Lannan,  recently  chartered 
a  bus  and  went  to  Owensboro,  Ky., 
for  a  visit  to  the  plants  of  Ken-Rad 
Tuoe  &  'Lamp  Corp. 

A  recent  check-up  on  the  visitors 
who  have  showed  up  at  the  television 
demonstrations  held  by  American  Tel- 
evision Corp.,  130  W.  56th  St.,  New 
York  City,  reveals  that  the  thousands 
of  guests  came  from  38  states.  Presi- 
dent Samuel  M.  Saltzman  of  ATC  col- 
lected data  on  program  preferences, 
and  found  that  televised  films  were 
popular,  that  drama  is  watched  for  its 
own  sake,  and  that  pick-ups  of  news 
events  will  be   important. 

Hygrade  Sylvania  Corp.  was  recently 
cited  by  the  National  Safety  Council 
for  a  record  of  3,497,842  man-hours 
worked  without  a  disabling  injury  be- 
tween Nov.  1,  1936,  and  June  1,  1938. 
The  Sylvania  plant  at  Emporium,  Pa., 
was  awarded  an  honor  roll  position. 

Now  to  represent  the  Meissner  job- 
bing line  in  North  and  South  Dakota, 
Minnesota,  Nebraska,  western  Wiscon- 
sin, northern  and  western  Iowa,  is  the 
Foster  Co.,  601  S.  Cedar  Lake  Road, 
Minneapolis,  Minn. 


EVERYTHING  IN  RADID! 


A  COMPLETE  SOURCE  FOR  YOUR  RADIO  NEEDS! 

Our  immense  stock  of  radio  sets,  parts  and  sup- 
plies enables  you  to  purchase  your  entire  needs  on 
one  order.  The  Big  BA  catalog  is  an  encyclopedia 
of  the  Radio  Industry.  You  will  find  all  your  Nat- 
ionally Known  Favorites  shown  in  this  Book  and 
it's  FREE  for  the  asking.  BA  service  is  better  than 
ever— practically  every  order  is  shipped  the  same 
day  it  is  received. 

Write  for  Big  New  Wholesale  Catalog 


BURSTEIN-HPPLEBEE  CD. 


1012-14  McGEE  STREET 

Kansas  City,  Missouri 


76 


Radio  Today 


President  John  W.  Million,  Jr.,  right, 
of  Million  Radio  &  Television  Labs,  is 
shown  with  the  firm's  new  chief  en- 
gineer, H.  D.  Von  Jenef.  Latter  has 
had  long  experience  with  Wells-Gard- 
ner, Continental,  Littlefuse  and  others. 


Sales  director  Herbert  L.  Vfeisburgh 
of  Brunswick  Radio,  who  recently 
stirred  up  radio  trade  interest  by  in- 
troducing a  complete  line  of  radios  in 
authentic  period-style  cabinets,  has 
announced  the  appointment  of  Sidney 
Vorzimar  as  Brunswick  sales  repre- 
sentative in  New  York  City.  Mr.  Vor- 
zimar, a  veteran  N.  Y.  radio  dealer, 
will  have  offices  at  Brunswwick  execu- 
tive headquarters  at  206  Lexington 
Ave.,  New  York  City. 

General  sales  manager  'Walter  F. 
Marsh  of  Meissner  Mfg.  Co.,  Mt.  Car- 
mel,  111.,  has  completed  a  tour  through 
northern  Illinois,  Iowa  and  Wisconsin. 
He  reports  widespread  enthusiasm 
among  jobbers  for  Meissners  new  1,  2 
and  3-tube  kits. 


Howard  Radio  Co.  managed  to  out- 
wit the  truck  strikers  in  California, 
and  actually  got  nearly  three  carloads 
of  radios  into  hands  of  dealers,  accord- 
ing to  Howard  sales  manager  Charles 
B.  Shapiro. 

New  York  transmitter  ~\V2XBF, 
which  will  try  out  the  matter  of  broad- 
casting regular  signals  as  well  as  fac- 
simile programs  on  a  single  channel, 
is  about  ready  to  go  on  the  air,  ac- 
cording to  the  owners,  Finch  Telecom- 
munications Laos.,  Inc.,  37  W.  57th  St., 
New  York  City.  Dealers  in  the  area 
may  then  have  a  chance  to  sell  the 
Finch  facsimile  receivers  to  the  public. 
Manufacture     of     the     receivers     now 


awaits  the  taking  of  Finch  licenses  by 
radio  manufacturers. 


In  the  area  of  Chicago,  northern  Illi- 
nois, eastern  Wisconsin,  and  southeast- 
ern Iowa  area,  the  Meissner  Mfg.  Co., 
Mt.  Carmel,  111.,  has  a  new  representa- 
tive: Instrument  Sales  Co.,  325  W. 
Huron  St.,  Chicago. 

Octave  Blake,  president  of  Cornell- 
Dubilier  Electric  Corp.,  South  Plain- 
field,  N.  J.,  announces  a  dividend  of 
10  cents  per  share  on  all  common 
stock  of  the  company.  Mr.  Blake 
pointed  out  that  profitable  operation 
of  the  organization  during  the  current 
period  of  economic  stress  has  been  due 
principally  to  the  introduction  of  new 
products,  and  the  development  of  new 
fields  of  application  for  these  products. 
As  a  direct  result,  Cornell-Dubilier 
sales  have  showed  an  increase,  com- 
pared with  the  rest  of  the  industry. 
Continued  modernization  of  C-D  equip- 
ment has,  of  course,  played  a  part  in 
more  economical  plant  operation,  while 
prices  in  the  industry  were  reduced  as 
much  as  40  per  cent  during  1938. 

Vice  president  Howard  Briggs  of 
Hoicard  Radio  Co.,  is  now  in  the  New 
England  area  helping  jobbers  with 
problems  arising  from  hurricane  and 
flood  damage. 

F.  Howard  Waite,  Ohio  representa- 
tive for  Stromberg-Carlson,  was  the 
winner  of  the  company's  "Spread  the 
Base"  contest.  Prize  for  annexing  the 
most  new  dealers  since  June  1st  was  a 
new  SC  model. 


A  prominent  manufacturers'  repre- 
sentative in  New  York  City  is  interest- 
ed in  handling  new  lines  of  test  equip- 
ment, soldering  irons,  auto-radio  vi- 
brators, theater  sound  equipment,  and 
crystal  mikes.  Interested  manufactur- 
ers may  reach  him  through  Reader 
Service  Dept.,  Radio  Today,  480  Lex- 
ington Ave.,  New  York  City. 


Latest  addition  to  the  1939  line  of 
Halson  Radio  &.  Television  Corp.,  Meri- 
den,  Conn.,  as  announced  by  Capt.  Eric 
Storm,  sales  manager,  is  a  5-tube  super- 
het  in  the  midget  series.  It  is  called 
Super  Dwarf  and  lists  at  ?18.50.  Cab- 
inets are  smartly  styled  in  onyx-like 
material,  in  a  variety  of  colors. 


recommends 


DELUXE 
CONNECTOR 


The  above  illustration  shows  both 
the  inside  and  the  outside  view 
of  COR-NEX,  installed  on  the  job 
and  ready  to  function — a  superb 
invention  by  a  practical  service- 
man, which  eliminates  for  all  time 
the  sloppy,  dangerous  connec- 
tions housewives  have  for  too 
long  put  up  with.  You  make  a 
real  profit  on  this  one!  And  how 
your  customers  will  thank  you! 
Easy  to  install.  Hailed  by  Ser- 
vicemen as  the  greatest  innova- 
tion in   years. 

COMPLETE— with  DOUBLET  light- 
ning arrester,  decorative  inside 
plate  with  leads  and  polarized 
plug   with   cords       $2.50   list 


A  masterly  A.  A.  &  K.  licensed 
system  that  abolishes  man-made 
static  on  broadcast  as  well  as 
short-wave  bands.  Improves  re- 
ception in  ANY  location.  Gives 
your  set  a  CHANCE!  Several 
units  at  attractive   prices. 

Distributed  Through  Jobbers 

CORNISH  WIRE  CO.,  Inc. 

30  CHURCH  STREET,  NEW  YORK  CITY 


WOVEN  FABRIC  RADIO  DIAL  BELTS 


SERVICEMEVS  KIT 


Exactly  the  same  as  originally  used  on  Zenith,  Emer- 
son, Crosley,  Grunow,  Sparton,  RCA  Victor,  Fada,  Strom- 
berg-Carlson, Detrola,  Silvertone  (Sears  Roebuck  & 
Co.),  Airline  (Montgomery  Ward),  Acratest,  Admiral, 
American  Rosch,  Relmont,  Capehart,  Fairbanks-Morse, 
Garod,  Lafayette,  Majestic,  Simplex,  Wells-Gardner, 
Westinghouse  and  Wilcox  &  Gay. 

Packed  in  individual  envelopes  and  put  up 
in  attractive  kits  of  25,   100  and  300  belts. 

Measurement    chart,    free    with    each    kit,    immediately 

identifies  any  belt  submitted  for  replacement. 

Send  for  complete  schedule 

J.  F.  D.  MANUFACTURING  CO. 

4111  Ft.  Hamilton  Parkway  Rrooklyn,  N.  Y. 


JOBBERS'  KIT 


October,  1938 


77 


. . .  Sell  MORE 
Automatic 

Combinations 

WORK  Into  a  blgsjer  volume,  bigger 
profit  demand,  with  popular-priced 
radio-phonographs  equipped  for  record 
changers.  Install  General  Industries 
Record  Changer  Units — thoroughly  es- 
tablished high-dependability  of  opera- 
tion   and    high-fidelity    reproduction. 

Ready   Assembled,   Easily   Installed 

Model  "M,"  latest  Improved  type,  plays 
and  changes  eight  10-Inch  or  seven  12- 
inch  records.  Model  "K"  plays  and 
changes  seven  10-lnch  records,  plays 
12-inch    records   changed    by   hand.  •  •  • 

ORDER    SAMPLES    AND    TEST    THEM 
OUT  IN  YOUR   OWN   CABINETS. 

In   ordering,    specify   exact   voltage   and    frequency   of 
current  you  use. 

^General  Inmjstlwes  c©«. 

3838   Taylor    Street,   Elyria,    Ohio 


DON'T  LET  SERVICE  WORK 
GET  YOUR  GOAT!    W**  i 


Equip  yourself  to , 
MASTER  THE  JOB- 

"C^VERY  service  man  who  is  on  his  toes  and 
*-/  who  expects  to  make  anything  out  of  service 
work,  needs  the  hacking  oi  Simpson  testing 
equipment.  Here  are  instruments  that  take  all 
guesswork  out  of  the  most  complex  service  jobs. 
You  ought  to  have  the  latest  information  on  the 
many  new  Simpson  developments  that  are  making 
such  a  tremendous  hit  among  service  men  every- 
where. We  shall  be  glad  to  send  you  the  latest 
Simpson  bulletins.  Why  not  write  for  them? 
Simpson  Electric  Co.,  5202 Kiniie  St.,  Chicago 

—And  now  the  New  333 

Tube  Tester-*  smaller  tube 
tester  built  to  highest  stand- 
ards of  Simpson  quality,  with 
a  lot  of  new  features,  at  the 
remarkably  low  price  of  $26.50. 
Write  for  new  circular  on  this 
amazing   little   tube  tester. 

— and  the  new  super  all- 
service,  tube  and  set  tester 

—the  Model  440  "Test- 
master"  There  is  truly  nothing 
that  you  can  ask  for  or  find  in 
any  instrument  that  is  not  cov- 
ered in  the  Model  440.  No  other 
tester  selling  at  any  price  pro- 
vides as  many  tests  and  ranges! 
At  $59.00  service  men  say  it's 
the  best  buy  on  the  market. 

— the  smallest  "Pocket  Type" 
A.  C.  and  D.  C.  service  Volt- 
Ohm  Milliammeter  on  the  mar- 
ket—the  Model  230 

At  $14.25  this  is  an  instrument  that 
every  service  man  will  want  in  his  kit. 


W9SIMPS0N 

9n4tAMJHitJtti.     tklLt     STAY    CiOCMSuJX. 


TRADE  TALK 


Ernest  P.  Scott,  Cleveland,  Ohio,  has 
been  appointed  representative  for 
Meissner  Mfg.  Co.,  in  Indiana  and 
Kentucky. 

American  Lava  Corp.,  Chattanooga, 
Tenn.,  has  taken  over  all  equipment 
and  good  will  ot  American  Ceramics 
&  Specialties  Corp.,  JacksiQn,  Mich. 
Manager  Carl  R.  Hower  and  produc- 
tion manager  O.  D.  Riseden  of  the  lat- 
ter firm  will  be  retained  by  American 
Lava  for  sales  and  engineering  posts. 

Capt.  Eric  F.  Storm,  sales  head  of 
Halson  Radio  &  Television,  Inc.,  Meri- 
den,  Conn.,  came  to  the  rescue  of  a 
stalled  train  when  flood  water  at 
Providence,  R.  I.,  isolated  passengers 
and  railroad  crew  from  the  outside 
world.  Capt.  Storm  who  happened  to 
be  aboard,  hooked  up  a  sample  Model 
S-5  Super  radio  receiver  to  a  bank  of 
storage  batteries  in  the  office  of  the 
chief  dispatcher,  and  news  broadcasts 
were  received  all  night. 

STEEM-ELECTRIG  WILL 
PROSECUTE  PATENT  INFRINGERS 

The  Steem-Electric  Corp.,  maker  of 
the  patented  Steem-Electric  iron,  has 
announced  that  it  will  prosecute  to 
the  fullest  extent  of  the  law,  any  firm 
or  corporation  making,  using,  or  sell- 
ing any  iron  that  infringes  upon  its 
patented  and  trade-marked  "Steem- 
Electric  Iron."  U.S.  patent  No.  2027767 
and  trade  mark  registered. 

Ohmite  Mfg.  Co.,  Chicago,  points 
with  pride  to  the  fact  that  Howard 
Hughes'  Lockheed  plane,  in  which  he 
made  his  famous  flight  around  the 
world  in  91  hours,  was  equipped  with 
Ohmite  vitreous-enameled  rheostats 
and  resistors. 

James  H.  "Jim"  Clements,  one  of 
radio's  old  timers,  has  been  put  in 
charge  of  equipment  business  for  Hy- 
tron  Corp.  in  the  states  of  Michigan 
and  Indiana.  His  offices  are  at  De- 
troit, Mich. 


Plastered  with  promotion,  here's   Art 
Wegert    of    GE    Suppy    Corp.,    Allen- 
town,  Pa.    The  sticker,  worn  at  sales 
huddles,  says,  "Buy  GE  Tubes." 


Flyer  Motors 
Help  You  Sell 
Combinations 
and  Records 

STEP  UP  your  output  of  combina- 
tions and  your  sales  of  records  by 
selling  combination  sets  equipped  frith 
Flyer  Motors.  Dependable  for  high- 
fidelity  playing;.  Because  made  by 
America's  leading  phonograph  motor 
specialists  and  having  superior  basic 
design.  Precision-built.  Constant  speed, 
accurately  controlled.  Easily  installed. 
Low  cost.  Every  set  is  a  better  set 
that   has   a   Flyer   Motor   In   it. 

Model   "V" 
Order  a  Sample  to  Test 

Range  of  styles  and  choice  of  equip- 
ment. In  ordering,  give  exact  voltage 
and   frequency  of  current   used. 

^General  Intoustmes  co. 

3838  Taylor  Street,  Elyria,  Ohio 


MILLION 


MODEL  CP — Gives  quick, 
positive  test  on  all  tubes. 
Accurate  and   dependable. 


$13.95 


$18.95 


MODEL  MO  —  Universal 
"Push  Button*'  test  for  all 
tubes.    A  leader  in  value. 

MILLION    RADIO   &  TEL.   LAB. 
647  W.  Ohio  Street        Chicago,  III. 


78 


Radio  Today 


•     INDEX     • 

TO 

ADVERTISEMENTS 


Page 

ALLIANCE    MFG.    CO 74 

AMERICAN    MICROPHONE    CO.,    INC 57 

AMPERITE  CO Cover  III 

AMY,   ACEVES   &   KING,    INC 69 

BERNARD,   H.  J 71 

BOGEN,    INC.,    DAVID    56 

BRUSH    DEVELOPMENT    CO 55 

BURSTEIN-APPLEBEE     CO 76 

CENTRALAB    66 

CINAUDAGRAPH   CORP 57 

CONTINENTAL    CARBON    CO.,    INC 67 

CORNELL-DUBILIER    ELEC.    CORP 72 

CORNISH  WIRE  CO.,   INC 77 

CROSLEY  RADIO  CORP 27 

ELECTRO    PRODUCTS    LABS SO 

GENERAL    ELECTRIC   CO Cover  II 

GENERAL    INDUSTRIES    CO 78 

HALLDORSON  CO 76 

HALSON  RADIO  &  TELEV.  CORP 62 

HYGRADE  SYLVANIA   CORP 21 

INTERNATIONAL    RADIO    CORP 25 

INTERNATIONAL    RESISTANCE    CO 59 

JANETTE    MFG.   CO 72 

JENSEN   RADIO   MFG.  CO 47 

J.  F.  D.  MANUFACTURING  CO 77 

KEN-RAD   TUBE   &   LAMP   CORP 63 

MALLORY  &  CO.,   INC.,   P.   R 1 

MEISSNER    MFG.    CO 29,67 

MILLION    RADIO    &   TELEV.    LABS 78 

NATIONAL   UNION   RADIO  CORP 69 

NOBLITT-SPARKS  INDUSTRIES,  INC... Cover  IV 

OPERADIO   MFG.  CO 33. 

OXFORD-TARTAK    RADIO    CORP 48 

PAR   METAL  PRODUCTS  CORP 48 

PARRIS-DUNN    CORP 56 

PHILCO    RADIO    &   TELEV.  CORP., 

Phonograph  Div.  6 
PHILCO  RADIO  &  TELEV.  CORP.,  Set  Div...  8 
PHILCO  RADIO  &  TELEV.  CORP.,  Tube  Div.     7 

THE    PORT-O-MATIC   CORP 73 

PRESTO  RECORDING   CORP 64 

RADIO   CORP.   OF   AMERICA.. 40,  41 

RADIO   SERVICEMEN    OF  AMERICA,    INC...   74 

RADOLEK   CO 79 

RALSTON    RECORD    CO 75 

RAYTHEON  PRODUCTION  CORP 5 

RCA  MFG.  CO.,   INC.,   RADIOTRON   DIV 37 

RCA  MFG.  CO.,  INC.,   RCA-VICTOR  DIV... 2,     3 

READRITE   METER  WORKS   68 

REGAL   AMPLIFIER    MFG.    CORP 79 

RIDER,   JOHN    F 70 

SERVICE    INSTRUMENTS,    INC 65 

SHURE     BROS 46 

SILVER   CORP.,   McMURDO    19 

SIMPSON    ELEC.   CO 78 

SPARKS-WITHINGTON     CO 23 

STANDARD    TRANSFORMER   CORP 67 

STEEM-ELEC.    CORP 61 

THORDARSON  ELEC.   MFG.  CO 52 

TRANSFORMER   CORP.   OF   AMERICA 54 

TRIAD    MFG.    CO.,    INC 74 

TRIPLETT  ELEC.   INSTRUMENT  CO 45 

TUNGSOL   LAMP  WORKS,    INC 73 

UNIVERSAL    CAMERA    CORP 63 

UNIVERSAL    MICROPHONE    CO.,    LTD 56 

UNIVERSITY  LABS 54 

VOCAGRAPH    SOUND    SYSTEMS 48 

WARD   LEONARD   ELEC.   CO 73 

WARD    PRODUCTS   CORP 76 

WEBSTER-CHICAGO     49 

WESTINGHOUSE    MERCHANDISING    HDQRS.     4 

WESTON   ELEC.   INSTRUMENT  CORP 53 

WHOLESALE  RADIO  SERVICE  CO.,  INC....  75 

While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against  the 
possibility  of  an  occasional  change  or 
omission   in  the   preparation   of  this   index. 


Special  guest  at  a  recent  radio  show- 
ing at  George  Worthington  Co.,  Cleve- 
land, Ohio,  was  Ed.  May,  from  Chicago 
headquarters  of  Sentinel  Radio  Corp. 
Mr.  May  presented  the  1939  Sentinel 
line  to  700  enthusiastic  Worthington 
salesmen,  after  an  extensive  trip 
through  Michigan,  Ohio  and  Upper 
New  York. 

E.  G.  Perkins  of  the  engineering 
department  of  Supreme  Instruments 
Corp.,  Greenwood,  Miss.,  is  now  in 
charge  of  the  company's  High  Fre- 
quency Test  Instrument  design.  For- 
mer chief  engineer  Floyd  Fausett  is 
no  longer  connected  with  the  firm. 

Soft  ball  teams  of  The  American 
Steel  Export  Co.,  Philco's  export  dept., 
and  of  Lafayette  Radio  Mfg.  Co.,  re- 
cently started  a  series  of  ball  games 
at  Central  Park,  New  York  City.  Wil- 
liam Green  of  Philco  and  L.  M.  Braun 
of  Lafayette  were  managers.  Lafayette 
won  the  first  game,  7  to  3. 

Now  to  cover  the  New  England 
states  for  Meissner  Mfg.  Co.,  is  the 
Ralph  H.  Clawson  Co.,  55  Kilby  St., 
Boston,  Mass. 

Dealers'  salesmen  who  are  the  win- 
ners in  Stromberg-Carlson's  Fourth 
Better  Salesmanship  Contest  have 
been  announced.  Highest  men  in  their 
locality,  and  winners  of  Labyrinth 
radios  are:  Francis  T.  White,  Chick- 
ering  &  Sons,  Boston;  Stanley  Lersch, 
Tri  Par  Radio,  Chicago;  A.  L.  Cavette. 
Grinnell  Bros.,  Bay  City,  Mich.;  Ros- 
coe  C.  Larkin,  Larkin  Radio,  Los  An- 
geles; John  J.  Larkin,  Hickson  Elec- 
tric Co.,  Rochester.  N.  Y.;  Herbert  J. 
Konen,  Noll  Piano  Co..  Milwaukee; 
W.  J.  Dalton.  G.  Fox  &  Co.,  Hartford, 
Conn.;  Frank  Krasa,  Altenoerg  Piano 
House,  Elizabeth,  N.  J.;  Fred  Sobel, 
Fred's  Radio.  Forest  Hills.  L.  I.;  Jo- 
seph Holzman,  Sun  Radio  Co.,  New 
York;  Joseph  Krause,  Isidore  Schiller, 
and  Irving  Walker,  all  of  Davega 
City  Co.,  New  York. 

In  the  new  downtown  Los  Angeles 
sales  offices  of  Universal  Microphone 
Co.,  Inglewood,  Calif.,  a  complete  dis- 
play of  Universal  microphone  and  re- 
cording products  has  been  set  up.  Lo- 
cated in  the  Beaux  Arts  building,  the 
exhibition  is  in  charge  of  factory  rep- 
resentative S.  E.  Shapiro. 

The  national  distributing  organiza- 
tion for  Stewart  Warner  has  been 
strengthened  by  the  appointment  of 
additional  distributors:  Griffith  Dis- 
tributing Corp.,  Indianapolis,  Ind. ;  The 
Ridge  Co.,  South  Bend,  Ind.;  B.  J.  Be- 
Jarnatt,  Fresno,  Calif;  W.  R.  Moore 
Dry  Goods  Co.,  Memphis,  Tenn.;  Kaem- 
per  &  Barrett,  San  Francisco,  Calif.; 
Peaslee-Gaulbert  Corp.,  Louisville,  Ky.; 
Hughes  -  Bozarth  -  Anderson  Co.,  Okla- 
homa City,  Okla.;  Air-Ola  Co.,  Inc., 
Huntington,  W.  "Va.;  Graybar  Electric 
Co.,  Los  Angeles,  Calif.;  Colen-Gruhn 
Co.,  Inc.,  New  York  City,  and  Reitz 
Sales  &  Service,  Omaha,  Neb. 

The  complete  line  of  test  instru- 
ments made  by  Radio  City  Products 
Co.,  88  Park  Place,  New  York  City,  will 
get  the  benefit  of  a  big  promotional 
campaign  this  Fall.  Direct  mail  and 
snappy  displays  are  part  of  the  drive. 


INTER-COMMUNICATION  SET 

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Complete  with 
Wire  READY-TO-USE.  Will  operate 
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~rm 


COMPLETE 

Send  for  catalogue 
showing  complete  line 
up  to  $79.50   list   price. 

REGAL  AMPLIFIER  MFG.  CORP. 

14-16  W.  17th  St.,  New  York 
Coble  Address  "Ramcoomp" 


Everything  in  Public  Address 

•  Radolek's  P.A.  line  is  complete!  High-gain, 
high-fidelity  amplifiers.  Complete  portable,  perma- 
nent and  mobile  systems.  Record  playing  systems. 
Outputs  of  5  to  90  watts  for  every  installation. 
Quality  construction.  Lowest  prices.  Entire  line  de- 
scribed fully  in  the  new  1939  Radolek  Profit  Guide. 

Most  Complete  Radio  Parts  Catalog 

•  Radolek  has  over  12,000  items  in  stock  for 
immediate  shipment.  Radolek's  prices  are  lowest. 
Send  for  the  new  1939  Radolek  Profit  Guide  now. 
It  contains  over  3,000  new  items  over  the  previ- 
ous edition.  It  will  give  you  new  ideas  in  conduct- 
ing your  radio  business  on  a  more  profitable  basis. 

ck7  radolek" &. 

601 W.  Randolph,  Chicago,  Dept.  D-24 

Send  me  the  new  1939  Radolek  Profit  Guide 
FREE. 

Name    

Address    

Serviceman?  □        Dealer?  □        Experimenter?  □ 


October,  1938 


79 


POWER    for  all  2  volt 

BATTERY     SETS 

in    the    home    and    in    store 
demonstrations  with  the  new 

Electro  slkE?J 
ELIMINATOR/ 

•  Clear,  humless  reception. 

•  Operates  from  110  volt  GO  cycle. 

•  Convenient,     low-cost     demonstration 
in   stores. 

•  Eliminates  all  charging  and  replace- 
ments. 

•  A-voItage    adjustable    0    to    2    volts — 
1   ampere. 

•  B-voltage  45,  6T,  90,  13o,  ISO. 

•  Tube      filaments      protected      against 
burn-out. 

•  Rich  black  and  chrome  finish. 

•  Size,       9y2x6y2i6y3:       wt.       packed, 
16y2   lbs. 

•  Finest    quality — should    give    lifetime 
service. 

•  Sold   with    a    money   back    guarantee. 


See  your  jobber  or  write  at 
once  jor  complete   details 


$14 


95 

NET 


ELECTRO     PRODUCTS 
LABORATORIES 

549  W.  RANDOLPH  ST.,  CHICAGO.  ILL. 


What 


RADIO 
TODAY 

do  in 
1939 


A  radio  publishing 
service  — not  available 
today -COMING! 


Paul  Westberg,  Chicago  manager  for  Weston,  congratulates  winner  of  Weston 
"50th  Anniversary  Contest,"  Alfred  Kilian  of  Chicago.  From  left  to  right:  Joe 
Marty,  Jr.,  executive  secretary,  RSA;  Ray  L.  Mason,  president  Chicago  RSA; 
Mr.   Kilian,  Mr.  Westberg,  and  W.  C.  Braun,  president  Radolek  Co.,   Chicago. 


KILIAN  WINS  WESTON  CONTEST 

First  prize  in  the  Weston  "50th  An- 
niversary Contest,"  consisting  of  a  com- 
plete service  man's  radio  bench 
equipped  with  analyzer,  tube  checker, 
oscillator  and  other  equipment,  has 
been  awarded  to  Alfred  Kilian,  radio 
service  man  of  Chicago.  Awards  in  the 
contest  were  based  on  the  most  prac- 
tical and  interesting  answers  to  the 
question,  "How  modern  test  equip- 
ment helped  me  to  solve  a  difficult  ser- 
vicing problem." 

Second  prize,  a  combination 
high-sensitivity  analyzer  and  tube 
checker  unit,  was  awarded  to  Francis 
Troiani,  Jamaica,  L.  I.  The  winner  of 
the  third  prize,  Harl  O.  Piety,  Lam- 
pasas, Texas,  received  a  Weston  Model 
776  Oscillator.  Others  among  the  25 
prize  winners  were: 

Herbert  Bussewitz,  Chicago,  111.;  De- 
pendable Radio  Service,  Great  Falls, 
Mont.;  Harvey  H.  Schock,  Reading, 
Pa.;  Floyd  A.  Martin,  Columbus,  Ohio; 
O.  R.  Sullivan,  Jasper,  Ala.;  Homer  C. 
Buck,  Detroit,  Mich.;  H.  E.  Gille,  Jer- 
sey City,  N.  J. 

SERVICEMEN  HAVE  TILL  OCT.  31 
FOR  SYLVANIA  PRIZES 

The  service  shop  modernization  con- 
test being  sponsored  by  Hygrade  Syl- 
vania  Corp.  will  be  continued  to  Oct. 
31,  according  to  a  new  announcement 
from  the  firm.  Prizes  worth  $100  will 
be  awarded  the  winners  soon  after 
that  date. 

Radio  service  men  who  revamp  their 
shops  in  the  neatest,  most  efficient 
and  most  appropriate  manner,  as  re- 
vealed in  submitted  photos,  will  be 
given  the  awards.  Suggestions  and 
ideas  on  shop  modernization  are  avail- 
able in  a  Model  Shop  booklet  available 
from  Hygrade  Sjtfvania  Corp.,  Em- 
porium, Pa. 

Shapiro  Sporting  Goods  Co.,  RCA 
jobbers  of  Newburgh,  N.  Y.,  have  been 
named  winners  in  the  national  contest 
recently  sponsored  by  RCA.  Prizes 
were  awarded  at  a  big  birthday  party 
celebrating  the  RCA  40th  anniversary, 
with  Camden,  N.  J.,  officials  on  hand. 

New  distributor  for  Stromberg  Carl- 
son throughout  eastern  and  southeast- 
ern Pennsylvania  is  Motor  Parts  Co., 
17th  and  Indiana  Ave.,  Philadelphia. 
Stuart  F.  LoucKheim  and  Carl  Wilken- 
ing  of  the  jobber  firm  look  forward  to 
excellent  profits  under  the  SC  fran- 
chise. 


In  Colorado,  Wyoming  and  New  Mex- 
ico, the  new  representative  for  Meiss- 
ner  is  the  Mountain  State  Sales  Co., 
2610  Dexter  St.,  Denver,  Colo. 

Renier  Radio  &  Television  Co.,  Du- 
buque, Iowa,  jobbers  who  cover  north- 
eastern Iowa,  northwestern  Illinois 
and  southwestern  Wisconsin,  have 
steadily  expanded  their  activities  until 
the  firm  now  wholesales  the  following 
lines:  Emerson  and  Stromberg  Carlson 
radios,  Ken-Rad  tubes,  Gibson  refrig- 
erators, One-Minute  washers,  Radiart 
vibrators,  Shure  microphones  and  pick- 
ups, Wright-DeCoster  speakers,  Presto 
recorders,  Cornish  Wire  aerials,  Snyder 
auto  aerials,  Burgess  dry  batteries, 
Oxidite  wet  batteries,  Aerovox  con- 
densers  and   resistors,   Meissner  prod- 


BOOK  REVIEW 


ELECTROLYTIC  CAPACITORS 

By  Paul  McK^ight  Deeley 

To  quote  the  author,  "Electrolytic 
Capacitors  was  prepared  in  the  hope 
of  making  available,  to  the  radio  and 
electrical  engineering  fraternity,  a 
fairly  complete  source  of  technical  in- 
formation on  the  theory,  construction, 
characteristics  and  application  of  elec- 
trolytic capacitors  of  all  types." 

Commencing  with  atoms,  molecules 
and  electrons  the  types  of  condenser 
are  explained  in  simple  language,  and 
the  electrolytic  is  shown  basically  to 
be  similar  to  any  other  type.  Because 
of  the  great  difference  in  wet  and  dry 
electrolytics,  they  are  handled  sepa- 
rately. Chapters  on  the  fabrication,  for- 
mation or  treatment  of  the  materials, 
and  aging  are  included.  All  the  types 
of  both  dry  and  wet  electrolytics  are 
discussed. 

In  addition  to  data  on  the  charac- 
teristics of  the  two  types,  a  chapter  is 
devoted  to  testing  of  the  units.  An- 
other section  deals  with  rectifiers  and 
filter  circuits  as  applied  to  electrolytics. 

AC  electrolytic  capacitors  are  in- 
cluded for  those  interested  in  motor 
condensers.  The  concluding  chapter 
is  an  appendix  of  useful  information. 

Published  by  Cornell-Dubilier  Elec- 
tric Corp.,  S.  Plainfield,  N.  J. — Radio 
Today. 


80 


Radio  Today 


PUSHUPTO 
INCREASE 

HIGHS; 
PUSH  DOWN 
TO  INCREASE 

LOWS 


-. 


^^ 


IMPROVES    ANY 

"LOW-COST" 
INSTALLATION 
ON  4  COUNTS! 

P.A.  Men,  you  can  im- 
■              prove   those    "price" 
jobs  by  using  the  popu- 
lar  Amperite   Model 
RAH  (or  RAL).  You  will  get  better 
results  because:  (1)  it  is  excellent  for 
both  speech  and  music;  (2)  has  ilat 
response  without  undesirable 
peaks;    (3)    reduces   feedback;   (4) 
stands  up  under  rain,  wind,  heat 
and  rough  handling  .  .  .  Frequency 
range  60  to7500CPS. Output  -68db. 
MODEL  RAH  (hi-imp);  with  12'  of 
cable;  MODEL  RAL  (200  ohms)  with 
8'  of  cable $22.00  LIST 


^AMPERITE 

V     ACOUSTIC  COMPENSATOR 


IH  OR  LOW  PITCH 

WITH    THE    SAME    MICROPHONE 

To  be  ahead  of  competition,  and  realize   a 

ach  job,  you  must  offer  added 

F  this,  Amperite  gives 

The   Acoustic  Compensator  .  .  .  at  no  extra  cost 

to  you!  ^^^^ 

isive,J«Sture  which  enables  you  to  (I)  iower  or 
^Pslo/  the  microphone:  2.  adjust  tor  close  talcing 
iBt-pickup;  (3i  adapt  microphone  to  varied  conditions. 

SE  4  MODELS  HAVE  THE  ACOUSTIC  COMPENSATOR 

MODEL  RBHk  (hi-imp);  RBMk  (200  ohms)  Frequency  range  40  to 
11000  CPS.  Output  -65  db. .'. . .  Chrome  or  Gunmetal  .  .S42.00  LIST 

NEW !  MODEL  RSHk  (hi-imp);  RBSk  (200  ohms)  Frequency  range  60 
to  8000  CPS.  Output   -68  db.. . .  Chrome  or  Gunmetal .  .532.00  LIST 

All  of  the  above  are  complete  with  Acoustic  Compen- 
sator, Switch,  Cable  Connector,  and  cable. 

NOTE:  Roth  Sound  Service  writes. . .  .  "Your  mikes  are  certainly 
rugged.  I've  used  them  in  rain,  wind,  and  on  the  hottest  days, 
but  they  re  always  stood  up  pedecthy". 


MAKE  EXTRA  SALES  WITH 
CONTACT  MffiES...$12.00  LIST 

Professional  and  amateur  musicians  axe  delighted 
with  the  Amperite  Contact  Microphone.  It  "makes 
an  ordinary  violin  sound  like  a  Strad"  . . .  gives  a 
small  piano  the  tone  of  a  grand.  And  yet,  there  is 
no  distortion.  No  unnatural  effects.  No  "lingering 
noises".  .  .  .  Frequency  response  40  to  M00  CPS. 
Output  -40  db.  20'  of  cable. 

Models  listed  below  can  be  used  on  most  radio 
sets  since  1935  and  on  all  P.A.  Systems.  They  oper- 
ate with  either  high  or  low  gain  amplifiers.  Instal- 
lation is  simple  . . .  no  changes  in  strings  or  instru- 
ments . . .  attached  without  tools. 

MODEL  SKH  (Hi-imp);  SKL  (200  ohms).$> 
SKH  or  SKL  with  foot-operated 

volume  control -j^^ 

Professional  Model  KTHjCortfTL) $22.00  LIST 


A  COMPACT 
VELOCITY 
foi  hand  or  stand 

Though  only  a  little 
larger  than  a  match 
box,  this  Amperite 
Velocity  has  the  fea- 
tures of  the  larger 
microphones.  Good 
for  speech  and  jnnstcT 
use  on  stanfc'm 
excellsg/^t 

Portable  pistol  grip. 
requency  response  60  to  7500  CPS. 
Outpuf  —70  db.  Complete  wit! 
switch,  cable  connector,  and  25' 
cable. 

MODEL  ACH  (hi-imp); 
or  ACL  (200  ohms) $25.00 


SaUi  ftdl  fioz  tk*  P. 


Amperite  offers  the  following  co-operation  to  P.A.  Men. 

UJ  FREE  Window  Decai^avert 

colors.  (2j  FREE^WifTdow  Display.  11  x  17.  (3)  Special  Sound  Equipment  Letterheads.  Samples 
and  prices  oo  real    5t.  (4J  FREE  use  of  cut  for  printing  business  cards,  etc. 


i? 


odneW;«u,frotedBul/e.inI.todayt 


MPERITE  i 


561  BROADWAY,  N.  Y.    U.S.A. 


CABLE  A 
ALKEM,  NEW  YORK  I 


\r  v  t    r\  r*  i 


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very  dealer's  "sales  team"  needs 
these  profit  scorin' 


ARVIN 

D  I  0  S 


,  plast" 


95 

us-1 


lobe- 


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P^C    lAOd-Bodio-<,hon0 
5^beStPp\ay^° 


r*1 


raised  to  show  phonogrop 


Modern,  Snappy  Gold  Foil 

Display  FREE 

with  the  Arvin  No.  30  Deal 


Set    u 
on  the 


sales  drive 
vins  with  this 
"eye  appealing"  window- 
counter  display.  It  is  free 
with  an  order  for  any 
three  Arvin  table  radios. 
Ask  your  jobber. 


•  With  these  new  Arvin  table  radios  your  "sales  team"  will  have 
the  profit-punch  to  roll  up  volume  and  extra  earnings.  They're  "All- 
Americans"  in  every  way.  Full-sized  radios  that  bring  in  American 
stations,  with  fine  selectivity  and  good  tone  quality. 

These  new  Arvins  are  styled  so  beautifully — built  so  well — and 
priced  so  reasonably — they  appeal  to  "All-Americans"  from  high 
school  freshman  to  college  senior,  from  housewife  to  business  man. 

Plastic  and  walnut  wood  cabinets  have  the  value-plus  sales  ap- 
peal of  push  button  tuning,  dial  tuning  or  a  combination  of  both. 
See  your  Arvin  catalog  for  full  details  on  these  and  all  the  fine 
quality  radios  in  the  complete  Arvin  line. 

NOBLITT-SPARKS  INDUSTRIES,  Inc.  .  COLUMBUS,  INDIANA 


;  slightly  higher  in  extreme  south  and  west. 


In  every  room  -  in  every  home  - 
Make  this  a  Radio  Christm 


NOVEMBER 

Caldwell-Clements,  Int.,  N.  Y. 


IN   THE   GREATEST    CHRISTMAS   PROMOTION 
IN    GENERAL     ELECTRIC     RADIO     HISTORY 


tfM»" 


M-> 


RADIOFORTE 

MODEL  G-95 


,*'_■ 


<0^^k 


KYI 

r.      | 


RADIOGRANDE 

MODEL  G-76 


II  Wli 


£ 


if,      flu 


t*s 


vj« 


Tire-  tarrTTOnff 


TABLE  MODEL 

MODEL   G-53 


GET    SET    FOR    TREMENDOUS    G-E 
RADIO     CHRISTMAS     BUSINESS 


This  season  General  Electric  Radio  dealers  will 
share  in  a  bumper  crop  of  Christmas  sales. 

G-E  MEANS  BUSINESS!  Here's  convincing  proof. 
A  gigantic  concentrated  barrage  of  G-E  Christ- 
mas advertising  in  ten  leading  magazines  will 
reach  33,500,000  readers.  Every  ad  in  full  color- 
smashing  4-color  spreads  —  sales-compelling  4- 
color  pages.  Can  you  afford  —  can  any  radio 
dealer  afford  not  to  line  up — and  stock  up — with 
G-E  Radio,  NOW! 

Get  in  touch  with  your  G-E  Radio  distributor  with- 
out delay. 

GENERAL  A  ELECTRIC 


W      TH*    G.f    . 

N°   oenQ.         'E4*-«-sco„t 

d—  -^:r*e. 

"**o  tOUcu  . 

°Sy-  AccUrote   I-  L  UNl"* 

tOUch  of  a  key    Y°Ur 

P'Ck  "*r*'J!ol""  TUN'NG 

G-fAo.     °r   **    h0Urs      . edlfferent 
does  the  r»  .        °9rc"nPre  <-   .     fhe 


„  ^  e<*>  did  i  cbtaj0lt  * 

to  find  all  this  swell  • 
NEW  information  in  the 
SECOND  (1938)  edition  of  the 

MALLORY-YAXLEY 

Radio  Service  Encyclopedia 


you  won't  find  it 
in  the  FIRST  EDITION 

Even  if  you  own  a  copy  of  the  First  Edition  MYE  you 
haven't  seen  anything  until  you've  seen  the  Second 
Edition.  It  has  336  pages  against  200... analyzes  17,000 
receivers  (5000  more  than  the  First  Edition)  .  . .  packed 
from  cover  to  cover  with  substantiated  data  that  you 
have  never  even  hoped  could  be  brought  between  the 
covers  of  one  book  .  .  .  much  information  that  has  never 
been  available  anywhere  before. 

Mallory-Yaxley  has  invested  over  $100,000.00  to  make 

this  the  book  of  books  for  radio  service  men.   You 

can't  begin   to  appreciate  what  it's  like  or  how 

much  bigger  and  better  it  is  than  the  First 

Edition  until  you've  actually  gone  through  it. 

Your  distributor  still  has  a  limited  supply 

available.    Don't    be    disappointed  ! 

Be  sure  to  get  your  copy  today. 


•  You'll  pay 
for  it  with  the 
time  you  save 
on    one   job 


P.  R.  MALLORY  &  CO.,  Inc. 
INDIANAPOLIS  INDIANA 

Cable  Address — Pelmallo 


*mmm 


MTOMflTIC  TUNING 

•■  ■  »B  push  button 
eircuits  covered 


Ium  mil 

JJse 

REPLACEMENT 
CONDENSERS.... VIBRATORS 

*      REPLACEMENT       "*■ 
VOLUME   CONTROLS 

,-^oa,,    — V^^si* 


RADIO  TODAY,  November,  1938,  Vol.  IV,  No.  11,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription 
price  U.  S.  and  Latin  American  countries:  $1.00  for  2  years.  Canada:  $1.25  for  2  years.  All  other  countries  $2.00  for  2  years;  single  copv,  15c.  Entered 
as  second-class  matter  July  24,  1936,  at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.  Printed  in  U.S.A.  "Member  of  A.  B.  C. 
Copyright    1938   by   Caldwell-Clements,   Inc. 


The  R  CA  1  ictor  Family  has  many  long- 
time members.  Above  is  Group  Super- 
visor Bessie  Purnell,  who  has  been 
with   Victor  for  32  of  its  4-0  years. 


8, 000  American  radio  operators  on  ships 
and  ashore  handle  hundreds  of  thousands 
of  radio  messages  that  help  business  and 
guard  lives  and  property,  headers  in 
these  activities  are  R.  C.  A.  Communi- 
cations, Inc. ,  and  Radiomarine  Corpo- 
ration of  America,  members  of  the 
family  of  RCA. 


to  most  Americans  today 
radio  is  entertainment,  news, 
and  education. .  .the  great- 
est show  on  earth.  But  to  345,000 
workers  and  their  families  ...  a 
total  of  some  1,380,000  men,  wo- 
men and  children . . .  radio  is  even 
more  than  a  show,  it  is  a  living. 
Where  only  a  few  years  ago  radio 
jobs  were  non-existent,  now  700 
odd  radio  stations  and  500  and 
more  factories  create  tens  of  thou- 
sands of  jobs. 

Radio  a  Boon  to  Thousands  in 
Wholesale  and  Retail  Businesses 

About  25,000  are  connected  with 
wholesale  establishments  handling 


radio  merchandise.  Retail  radio 
merchants  account  for  56,000  and 
salesmen,  service  men,  and  others 
engaged  in  radio  sales  and  service 
number  150,000. 

For  retailers  and  wholesalers  as 
well  as  for  the  19,000  members  of 
its  own  organization,  the  Radio 
Corporation  of  America  works  ag- 
gressively to  bring  ever  increasing 
prosperity  by  constantly  improv- 
ing the  services  radio  gives  the 
public.  America  has  come  to  rec- 
ognize the  advantages  in  going 
"RCA  ALL  THE  WAY."  As 
a  result .  . .  there  is  an  ever  richer 
field  of  opportunity  for  merchants 
who  go  RCA  All  The  Way,  too. 


Listen  to  the     Magic  Key  of  RCA"  every  Sunday,  2 
to  3  P.  M.,  E.  S.T.,  on  the  NBC  Blue  Network. 


RADIO  CORPORATION  OF  AMERICA 

RADIO  CITY,  N.  Y. 

RCA  MANUFACTURING  CO.,  INC.  RCA  INSTITUTES,  INC.  R.C; A.  COMMUNICATIONS,  INC. 

RADIOMARINE  CORPORATION  OF  AMERICA  NATIONAL  BROADCASTING  COMPANY 


Radio  Today 


Tmerson 

WORLD'S  BIGGEST  SELLING  LITTLE  RADIO 


Outlin  Fiont  as  the  IDEAL  GIFT 

It  Fairly  Radiates  the  Holiday  Spirit  — 
it  Stops  the  Crowds  and  Gets  Them  In! 

STYLE— SIZE— COLOR— PERFORMANCE— QUALITY— PRICE— what 
a  line-up  for  magnetic  Holiday  display  and  irresistible  buying  inducement! 
More  sales  for  CASH — quick  action  over  the  counter — with  a  new  1939 
Emerson  model  for  every  purpose  and  every  purse!  Here  are  the  dramatic 
ANSWERS  to  what  YOU  should  do  NOW  to  pile  up  the  biggest  sales  records 
in  history.  Make  no  mistake  about  it — EMERSON  is  America's  "No.  1" 
Holiday  feature. 


EMERSON    "Little    Miracle"— Model    AX-212 

With  "MIRACLE  TONE  CHAMBER" 

5-Tube  AC-DC  Superheterodyne.  (7-Tube  perform- 
ance.) American  Broadcasts  and  Police  Calls  .  .  . 
Electro  Dynamic  Speaker  .  .  .  Automatic  Volume  Con- 
trol .  .  .  Built-in  Antenna.  Hand-rubbed  figured  butt 
walnut    cabinet    or   figured   maple. 


$1995 


69  New  1939  Emerson  Models  —  $9.95  to  $219.95. 
Ask  Your  Distributor  for  Christmas  Display  Materials. 


EMERSON   "Little   Miracle" 
—Model   AX-235 

With 
"MIRACLE  TONE  CHAMBER" 
— Wide  Selection  of  Gem-like 
Colors.  5-tube  AC-DC  Super- 
heterodyne. (7-tube  perform- 
ance.) American  Broadcasts 
and  Police  Calls  .  .  .  Electro 
Dynamic  Speaker  .  .  .  Automa- 
tic Volume  Control  .  .  .  Built- 
in  Antenna  .  .  .  Plastic  cabi- 
nets of  gem-like  beauty. 

$1795 


EMERSON  Model  AX-221 
Combination  Radio-Phonograph 

With  "MIRACLE  TONECHAMBER** 

5-Tube  AC  Superheterodyne.  { 7-tube 
performance) .  American  Broad- 
casts and  Police  Calls  .  .  .  6s/2" 
Permanent  Magnet  Dynamic 
Speaker  .  .  .  Automatic  Volume 
Control  .  .  .  Built-in  Antenna. 
PHONOGRAPH:  Self  -  Starting 
Constant  Speed  Motor  .  .  .  Crys- 
tal Pick-up  .  .  .  Tone  Control.  Plays 
10"  and  12" 
records.  Hand- 
rubbed  walnut 
finish  cabinet. 


$4495 


EMERSON  RADIO  AND  PHONOGRAPH  CORPORATION    •  111   Eighth  Avenue 

"World's  Largest  Maker  of  Small  Radios" 
November,  1938 


New  York,  N.  Y.  ^merson. 

Radio  and 
Television 

•I 


€*©*fcfr¥  IS  DEFINITELY 
the  CHRISTMAS  Volume  Line! 


-  - . 


f/^ei 


SEXTETTE 


PUSHBUTTON,  SUPERHET- 
ERODYNE, AC-DC,  6  TUBE 

(including  ballast)  with  5-inch 
dynamic  speaker.A  real  achieve- 
mentofCrosleyengineers.  Brown 
moulded  cabinet  of  walnut  finish. 
Introduces  large  vertical  gold 
etched  dial  which  is  tuned  by 
knob  and  push  buttons  are 
mounted  on  the  top.  Also  in  red 
and  ivory  at  slightly  higher  price. 

$14.99* 


:■  ■  ■ 

-• 


~rfie  VANITY 

PUSH  BUTTON  Radio  at 
the  market's  lowest  price. 
Knobs  on  end  permit  manual 
tuning  also.  Brown  moulded 
case  permits  two  playing  posi- 
tions. A  volume  seller  when 
properly  promoted.  It  has 
a  wide  Christmas  appeal  at 
its  incredibly  low  price. 

$9.99 


.« 


7&e  sixer 


6  TUBE,  2  BA.ND,  PUSH 
BUTTON,  SUPERHETERO- 
DYNE, the  sensational  Crosley 
"Fiver"  to  which  engineers 
have  added  another  tube,  de- 
veloped more  efficiency  and 
housed  in  a  beautifully  moulded 
brown  modern  plastic  cabinet. 
It  is  the  season's  sensation  if 
sales  are  any  indication.  In 
red  and  ivory  at  slightly  higher 
prices   than   brown,   which   is 

$19.99* 


ic Prices  F.  O.  B.  Cincinnati  (subject  to  change). 

YOU'RE  There  WITH  A 


THE  CROSLEY  RADIO  CORPORATION,  CINCINNATI 


: 


TABLE   MODELS,   $8.99  to   $39.95 
CONSOLE  MODELS,  $49.95  to  $99.50 
COMBINATION     MODELS     (Phono- 
graph and  Radio),  $24.95  to  $59.95 


" 


w 


VANITY 


5-TUBE  SUPERHETERO- 
DYNE! Astonishing  radio 
reception  and  volume  at  an  in- 
credibly low  price.  Push  buttons 
and  knob  tuning.  It,  too,  has 
a  wide  Christmas  appeal. 
It's  compact  —  it's  efficient! 
In  ivory  it's  $13.99. 

$12-"* 


7Ze 


TROUPER 


POWEL  CROSLEY,  Jr.,  President 


Home  of  WLW     "the  Nation's  Station" 


5  TUBE  (including  ballast)  AC-DC  with 
beam  power  output  and  electro-dynamic 
speaker.  Brown  plastic  case.  Illuminated 
dial.  Requires  no  ground.  Easily  carried 
when  travelling.  Only  8  inches  long. 
Sensitive  and  sharp  and  surprising  in 
resonant  volume 
— truly  a  mighty 
mite  of  radio.  In 
Ivory    at    $9.99. 


$3-99 


Radio  Today 


American  Airlines,  Inc. 
/J~  §  Fly   with 


■>$*$ 


rr 


-tx 


'  ^l^#-# 


1 1 


With  radio  beams  to  mark  the  air  lanes  clearly  .  .  .  two-way  radio 
communication  between  plane  and  ground  .  .  .  and  precision  instruments 
to  guide  the  pilots,  commercial  air  transportation  has  now  become  one  of 
the  safest,  most  dependable  ways  to  travel. 

Weather  is  reported — arrivals,  departures  and  the  very  courses 
planes  fly  are  directed  by  radio. 

For  this  important  work,  American  Airlines,  Inc.  use  RAYTHEON 
radio  tubes!  A  weak  or  inefficient  tube  has  no  place  in  a  fleet-winged  Flag- 
ship. And  American  knows  the  reputation  RAYTHEONS  have  for  sturdiness 
and  longevity — and  for  perfect,  dependable  performance  under  all  conditions. 

Successful  Dealers  and  Servicemen— those  who  are  in  business  to 
stay  are  finding  that  RAYTHEON  tubes  are  their  insurance  of  the  best— 
for  permanent  tube  profits.  And  a  wise  investment.  Yet  they  cost  no  more 
than  the  second-best  tube! 


AYTH  to 


rOHK  .  c* 


.  ATLANTA 


"WORLD'S  LARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS" 

November,  1938  5 


PLAYS  10"  AND  12"  RECORDS  I 


NO  MORE  SCRATCHED  RECORDS!  NO  "HUNTING"  FOR 
THE  GROOVE!  A  CHILD  CAN  START  OR  REPEAT  RECORDS! 


Here's  the  really  selling-feature  for  low-priced 
phonographs,  and  only  PHONOGRAPH  WITH 
PHILCO  has  it!  The  Semi-Automatic  Reproducer 
permits  you  to  make  a  real  demonstration  to 
your  prospects  .  .  .  gives  you  a  sales  advan- 
tage that  "clicks"  every  time!  Just  place  a  ten- 
inch  or  twelve-inch  record  on  the  turn  table 
and  close  the  lid  !  The  record  plays  instantly 
.  .  .  automatically  ! 


And  . . .  lift  the  lid  slightly  and  close  it,  and  the 
record  repeats  itself  . . .  automatically!  No  more 
hunting  for  the  first  groove  ...  no  more  scratches. 
PHONOGRAPH  WITH  PHILCO  Semi-Automatic 
Reproducer  automatically  sets  the  needle  in  the 
starting  groove  when  you  close  the  lid.  100% 
perfect  tracking !  Full-range  crystal  pick-up. 
And  all  Semi-Automatic  models  equipped  with 
self-starting  motors  ! 


PHONOGRAPH  with  PHILCO-SEE  YOUR  PHILCO  DISTRIBUTOR 


Radio  Today 


PHILCO  RADIO    STORE 


Bui/d Storeliaffh 


„a 


with 


i 


) 


IU 


EVERY  radio  dealer  is  anxious  to  increase  his 
store  traffic  .  .  .  because  the  more  people  he 
gets  into  his  store,  the  greater  his  opportunity 
for  making  new-set  sales.  And  one  of  the  easiest 
ways  to  build  store  traffic  is  by  featuring  and 
pushing  Philco  Tubes.  Here's  why: 

The  greatest  name  in  radio  today  .  .  .  the  name 
that  comes  first  to  most  every  mind ...  is  PHILCO. 
And  right  now,  due  to  the  tremendous  interest  in 
Philco's  sensational  Mystery  Control,  that  name 
is  greater  than  ever  before  .  .  .  on  the  tongues  of 
millions  and  millions  of  people.  As  a  result  more 
and  more  people,  who  need  new  tubes,  are  asking 
for  Philco  Tubes  .  .  .  patronizing  the  store  that 
sells  them. 

Cash -in  on  this  public  preference  for  Philco 
Tubes  ...  a  preference  that  not  only  brings  you 
steady  tube  sales  and  profits,  but  paves  the  way 
for  even  more  profitable  Philco  Radio  sales ! 


7Jz&  <Suai4t  TudeJ.  in  the  10o4<6/ Id- Se//, 


HARRY  BOYD  BROWN 

National  Merchandising 
Manager  of  Pbilco 


The  Public  Tells  Us . . . 
"Philco  has  set  a  new  vogue 
in  radio  furniture  ■  ■ .  Spinet!7' 


TN  our  1939  Philco  announcements  to  the  trade  we  told  you 


two  things.  First,  that  Philco  Mystery  Control  would  be  the 
most  sensational  store-traffic  puller  the  radio  industry  has  ever 
known.  Second,  we  told  you  that  the  new  Philco  "Spinet  Type"  cabinets  would 
start  a  new  trend  in  radio  furniture  design. 

Both  predictions  have  come  true,  as  Philco  dealers  in  every  section  of  the 
country  can  testify.  And  if  it  were  not  for  the  tremendous  interest  caused  by 
Philco  Mystery  Control,  the  public's  reception  of  the  new  Philco  Spinet  Type 
cabinets  would  easily  be  the  Big  News  of  radio  for  1939. 

Nothing  in  radio  history  has  won  such  instant  and  overwhelming  approval 
from  the  women  of  America  as  this  new  Philco  cabinet  design.  It  is  exactly 
what  the  younger  generation  in  particular  has  been  demanding. 

Home  decoration  experts  and  the  retail  furniture  industry  everywhere  pro- 
nounce it  the  one  and  complete  reply  to  the  demand  for  a  radio  cabinet  that 
would  look  well — not  only  on  the  dealer's  floor,  but  also  in  the  customer's  home. 

For  years,  America's  homemakers  have  yearned  for  radio  furniture  that  would 
blend  and  harmonize  with  the  settings  of  their  rooms — for  cabinets  that  would 
not  stick  out  like  a  sore  thumb  and  smother  and  dwarf  the  other  furnishings  of 
the  room. 

In  short,  the  American  women  have  demanded  a  new  deal  in  radio  cabinets 
that  would  permit  them  to  take  pride  in  their  home  furnishings.  And  dealer  and 
public  alike  agree  that  it  is  here  in  the  new  Spinet  Type  of  radio  created  by 
Philco  for  1939. 

The  latest  thing  in  radio  cabinet  design — furniture  of  distinguished  simplic- 
ity— a  new  vogue,  a  new  style  trend  that  is  rapidly  doing  away  with  the  old  type, 
bulky,  bulging,  box-like  kind  of  cabinet. 

Some  places  it  is  called  "Spinet";  other  places  "Period";  somewhere  else 
"Modern";  but  everywhere  it  is  called  the  most  beautiful,  the  most  distinctive  and 
artistic  radio  cabinet  ever  designed.  A  radio  style  development  that  will  ob- 
solete old-fashioned  radios  by  the  hundreds  of  thousands. 

And  the  radio  dealers  of  America  are  taking  the  fullest  advantage  of  the  rapid 
public  trend  toward  this  new  "Spinet"  styling  in  radio.  Artistic  window  dis- 
plays by  the  many  thousands — beautiful  floor  displays  exclusively  "Spinet"  type 
radio  models — also  direct  mail — also  newspaper  advertising.  And  most  im- 
portant of  all,  the  retail  salesman  is  adding  to  the  momentum  of  this  style  move- 
ment with  that  selling  power  he  alone  possesses. 


PttttC 


^H^^^-ffi^^^^  tiLo-v-rs^. 


Radio  Today 


NOV  2' 


1938 

©C1B    398450 


Staff— 

Darrell  Bartee 
G.  H.  Mayorga 
N.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton   K.   Ulrich 


M.  E.  Herring 

Sales  Manager 


R.    Y.    Fitzpatrick 
201  N.  Wells,  Chicago,  111. 


Orestes  H.  Caldwell 
Editor 

M.  Clements 
Publisher 


Vol.  IV,  No.   11 
Copyright  1938 

Caldwell-Clements,    Inc. 

Tel.  Plaza  3-1340 

480    Lexington   Ave. 

New  York,  N.  Y. 


Member  Audit  Bureau  of  Circulations 


TRUSTWORTHY  UPTREND 

The  signs  of  the  times  are  solidly, 
stoutly  okay.  Nothing  seems  to  bother 
the  business  recovery  which  got  in- 
vincibly under  way  this  Fall. 

American  industry  put  729,000 
workers  back  on  the  job,  in  September 
as  compared  with  August,  according 
to  figures  from  the  National  Indus- 
trial Conference  Board,  and  employ- 
ment further  increased  in  October. 
The  auto  factories  are  involved  in 
more-than-seasonal  activity,  and  steel 
operations  are  setting  peaks  for  the 
year. 

And  for  radio,  there's  the  extra 
asset  of  Christmas,  coming  up.  Holi- 
day shopping  has  a  traditional  tempo 
unequalled  by  any  other  period  of 
the  year.  Every  radio  store  should 
be   a   nest    of   buyers,   from   now   on. 


PORTABLES  IN  PROFUSION 

With  the  new  battery  portables 
winning  unexpected  demand,  design- 
ers are  trying  to  see  in  what  addi- 
tional ways  the  1.4-volt  dry-cell  re- 
ceiver can  be  applied.  One  direction 
is  that  of  combining  the  portable  and 
the  car  radio,  in  the  belief  that  a  con- 
venient battery  portable  on  the  front 
seat  would  serve  many  of  the  purposes 
of  an  installed  auto-radio,  and  still 
would  be  available  for  use  in  hotel  or 
camp  at  the  end  of  the  journey. 
Making  the  portable  compact  and  ob- 
long, to  fit  on  the  seat  between  the 
two  front-seat  occupants,  is  a  plan 
adopted  by  one  designer. 

Meanwhile  engineers  are  trying  to 
cut  down  the  size  of  the  portable  by 
reducing  battery  capacity  and  weight. 
Most  of  the  weight  of  present  port- 
ables is  attributable  to  battery  capac- 
ity enough  to  run  the  set  for  many 
months.  Cut  this  battery  capacity 
to  a  few  days,  and  provide  for  easy 
cell  replacement,  and  the  portable 
can  be  shaved  to  dimensions  of  a  real 
everyday  convenience.  Sets  no  bigger 
than    a    prayer-book,    will    fulfill    the 


"pocket-radio''  of  the  future.  Such 
sets,  each  with  a  built-in  headphone, 
would  become  the  incessant  compan- 
ions of  millions  if  we  go  through  any 
more  European  war  crises. 

Here,  in  the  pocket-radio,  is  one  of 
the  last  remaining  frontiers  for  mass 
radio  sales,  and  already  in  several 
laboratories  work  is  being  speeded  to 
capture  this  "pocket"  market. 

RADIO  SALES  ANTICIPATE 
BUSINESS  UPTURN? 

Over  the  past  four-  years,  radio 
seems  to  have  revealed  itself  as  an 
advance  harbinger  of  the  general 
business  situation. 

Back  in  1935,  before  general  busi- 
ness turned  up,  radio  had  already  en- 
joyed a  vigorous  come-back.  Radio 
continued  to  boom  throughout  1936, 
while  general  business  caught  up  with 
it.  The  "1937  recession"  began  for 
radio,  however,  in  April,  1937,  nearly 


four  months  before  the  collapse  of 
general  business  in  September,  1937. 

And  now  in  the  Fall  of  1938,  al- 
though general  business  shows  some 
recovery,  radio  manufacturing  in 
many  divisions  equals  or  exceeds  the 
volume  of  a  year  ago. 

Chart  below  reproduces  the  "busi- 
ness index"  of  the  New  York  Times, 
as  the  measure  of  general  business, 
while  the  radio  trend  has  been 
sketched  in  to  show  how  radio  not 
only  anticipated  general  recovery  in 
1935,  but  also  anticipated  the  tobog- 
gan-slide of  the  Fall  recession  by  an 
interval  of  several  months.  At  pres- 
ent, as  the  chart  shows,  radio  has 
climbed  pretty  well  out  of  the  1937- 
38  morass,  although  general  business 
has  recovered  only  35  per  cent  of  its 
1937  losses. 

Thus  with  three  different  move- 
ments of  the  business  index,  radio 
has  "called  the  turn"  four  to  six 
months  ahead  of  the  corresponding 
movement  of  general  business. 


RADIO  AS  AN  ADVANCE  INDEX  OF  GENERAL  BUSINESS 


Three  times,  now,  radio  has  anticipated  future  changes  in  the  general  business 

industry.     Note  that  radio  recovery  preceded  the  business  upturns  of  both  1935 

and   1938 — while  radio's  own   1937   "recession"  began  four  months  ahead  of  the 

general  1937  downslide! 


November,  1938 


WAGES-HOURS  LAW  SEEN  AS 
PRICE  STABILIZER 

Operation  of  the  new  Wages  and- 
Hours  Law  lias  proved  to  have  little 
effect  in  the  radio  industry,  except  to 
provide  beneficial  minimums  which 
will  aid  in  bringing  up  the  labor  costs 
of  a  few  low-priced  producers.  In 
this  way  the  new  law  is  expected  to 
have  a  good  effect  in  stabilizing  labor 
costs  and,  in  turn,  the  price  sched- 
ules of  the  industry  as  a  whole. 

Labor  rates  in  radio-parts  manufac- 
turing plants  in  the  Eastern  market 
have  averaged  from  32  cents  to  42 
cents  per  hour.  In  the  Middle  West, 
the  corresponding  figure  has  run  from 
32  cents  to  37  cents.  These  rates  are 
all  well  above  the  25  cents  per  hour 
minimum  provided  by  the  new  Fed- 
eral law,  although  a  few  marginal 
manufacturers  have  been  forced  to 
come  .up  "out  of  the  basement"  and 
keep  above  the  "floor"  imposed  by  the 
new  Federal  statute.  The  effect  of 
this  is  viewed  as  beneficial  in  level- 
ing labor  costs  and  stabilizing  prod- 
uct prices. 

FLASHES  FROM 
NY  STOCK  EXCHANGE 

There's  so  much  interest  in  what 
goes  on  at  the  New  York  Stock  Ex- 
change that  short-wave  fans  here  and 
abroad  are  asking  when  stock  quota- 
tions are  broadcast.  According  to 
Exchange  officials,  here's  the  dope : 

WlXK,    Boston,    Mass.,    airs    the 


stock  reports  daily  at  12:25,  12:45, 
and  at  4 :45  p.m.  On  Saturdays,  the 
time  is  12  :45  p.m.  only. 

W2XAF,  Schenectady,  N.  Y., 
broadcasts  the  quotations  daily  at 
7  :30  p.m.,  and  sister  station  W2XAB 
of  that  city  is  on  the  air  at  12 :45 
p.m.  on  Saturdays. 


A  THEME  FOR  RADIO  MEN'S 
XMAS  GREETINGS 

In  his  Christmas  cards  to  radio 
friends,  last  season,  Commander  E.  F. 
McDonald,  Jr.,  president  of  Zenith, 
pointed  out  that  the  man  who  sells 
radios  is  selling  something  more  than 
mere  merchandise;  he  is  a  benefactor 
to  humanity  who  is  helping  to  broad- 
cast enjoyment,  education,  inspira- 
tion and  happiness  among  his  fellow 
men. 

We  reproduce  below  the  text  of 
Commander  McDonald's  1937  Christ- 
mas card,  as  an  inspiring  thought 
for  the  radio  industry  at  this  time, 
believing  that  other  radio  men  may 
like  to  incorporate  a  similar  theme  in 
their  own  1938  greetings. 


Truly  the  secret  of  happiness  lies 
in  making  others  happy.  In  no  busi- 
ness can  you  spread  more  happiness 
than  in  the  radio  business — for  into 
the  homes  of  the  people  the  radio 
brings  song  and  laughter  and  relief 
from  life's  burdens. 

A  Merry  Christmas  to  You. 

E.  F.  McDonald,  Jr. 


NEW  SETS  WITH  ALL-GLASS 
"LOCTAL"  TUBES 


IJ|mmc.* 


2 1  MAX. 


211 
32 
MAX. 


.4T7-U  ?Uf  U-aa-MA*. 

MAX.      I— J  T 


_L 


Executives  descend  on  Indianapolis — the  RCA  vice-presidents  shown  here  are, 
from  left,  front  row,  Vance  C.  Woodcox,  Thomas  F.  Joyce,  (advertising  manager) 
F.  H.  Corregan,  Lewis  M.  Clement,  and  Robert  Shannon.  Back  row,  N.  A.  Mears, 
F.  R.  Deakins,  H.  C.  Bonfig,  Eugene  W.  Ritter  (Harrison,  N.  J.),  and  J.  M. 
Smith  (Indianapolis). 


.265"DIA.MAX. 

Rumors  in  the  radio  industry  indi- 
cate that  a  new  line  of  radio  receiv- 
ers is  about  to  appear  using  the  new 
all-glass  "locking"  tubes  which  were 
developed  "primarily  for  television." 
The  new  tubes  are  without  bases,  are 
more  compact,  have  less  inter-elec- 
trode capacity,  and  are  expected  to  be 
cheaper  when  in  large-scale  produc- 
tion. Already  broadcast  receivers  us- 
ing these  tubes  have  been  produced 
and  are  on  test,  and  announcement 
is  expected  momentarily  of  their  read- 
iness for  the  receiver-buying  public. 

As  developed  by  the  Hygrade-Syl- 
vania  Corporation  for  television  video 
amplifiers,  the  new  type  1231  triple- 
grid  amplifier  tube  has  no  regular 
base,  the  lower  portion  of  the  bulb 
being  fitted  with  a  metallic  shell  pro- 
viding a  guide-pin  of  metal  which 
makes  possible  locking-in  action  in 
the  socket.  The  grid  lead  connects  to 
one  of  the  pins,  permitting  the  use 
of  much  shorter  grid  leads  and  elimi- 
nating troublesome  cap  connections. 
The  eight  prongs  are  different  from 
those  of  the  present  octal  base  and  re- 
quire a  different  kind  of  socket.  For 
tube-testers  and  analyzers,  adapters 
can  be  provided. 

BROADCASTS  TO  HELP  YOU 
SELL  XMAS  RADIOS 

Each  Christmas  season  for  many 
years  past,  the  great  broadcasting 
networks  have  invited  Radio  Today's 
editor,  0.  H.  Caldwell,  to  give  their 
listeners  an  impartial  review  of  novel 
features  of  the  new  radio  sets  avail- 
able as  Christmas  gifts. 

Again  this  season,  early  in  Decem- 
ber, Editor  Caldwell  will  put  on  the 
air  these  invaluable  stimulants  to 
radio-set  selling.  Watch  for  dates  in 
your  local  newspapers,  and  tie  up 
with  these  Radio  Today  broadcasts  in 
your  own  selling  of  Christmas  radios. 


10 


Radio  Today 


RADIO  LEGISLATION  AHEAD 

In  advance  of  the  meetings  next 
January  of  44  state  legislatures,  the 
RMA  Legislative  Committee,  headed 
by  Chairman  A.  H.  Gardner  of  Buf- 
falo, and  Bond  Geddes,  executive  vice- 
president,  is  preparing  to  represent 
the  industry  on  much  important  legis- 
lation. In  Congress,  which  also  con- 
venes in  January,  additional  legisla- 
tion is  expected,  with  present  prospects 
of  extension  of  the  5  per  cent  radio 
excise  tax  law.  This,  with  other  nui- 
sance taxes,  would  have  expired  June 
30,  1939,  but  Treasury  and  Congres- 
sional leaders  now  seem  disposed  to 
continue  it  because  of  federal  revenue 
needs.  Much  radio  legislation,  espe- 
cially regarding  broadcasting  and 
merchandising,  also  is  expected  from 
the  state  legislatures. 

In  connection  with  automobile 
radio  and  also  general  legislation, 
such  as  state  registration  of  trade- 
marks, licensing  of  dealers,  resale- 
price  maintenance,  etc.,  arrangements 
are  being  made  for  permanent  organ- 
ization of  all  automotive  interests, 
including  the  RMA  interest  in  auto- 
mobile  radio,   for   joint   information. 

BRAND  PREFERENCES 
IN  AUTO  RADIO 

Among  the  things  investigated  in 
the  "home  inventory"  which  Seripps- 
Howard  conducted  among  53,124 
households  in  16  leading  cities,  was 
the  matter  of  auto  radio.  In  the 
composite  picture,  the  brand  prefer- 
ences were,  in  per  cent  of  mentions: 

Philco     34.4 

Motorola   10.4 

Delco   6  4 

RCA    4.1 

True  Tone  3.4 

Zenith    2.5 

General  Electric  2.5 

Crosley    2.0 

Majestic    2.0 

Silvertone   1.4 

Arvin  1.2 

Bosch  1.2 

Stewart-Warner 1.1 

All  others  (less  than  1  per  cent.  .27.1 

"SELL  RADIO  IDEAS" — BONFIG 

"Production  has  been  developed  to 
such  a  high  order  today  that  we  can 
actually  build  more  of  almost  any- 
thing than  we  can  consume.  That 
brings  us  to  the  present  or  'selling' 
era,  when  it  becomes  necessary  to  sell 
the  products  which  we  have  engi- 
neered and  manufactured,"  declared 
Henry  C.  Bonfig,  commercial  vice- 
president  of  RCA  Manufacturing 
Co.,  talking  on  "Looking  Ahead  with 


Allen  B.  DuMont  of  the  DuMont  Labs 
takes  another  look  at  his  14"  television 
tube.  His  firm  made  the  headlines 
again  when  Paramount  Pictures  got 
interested  in  his  video  work,  announced 
plans  for  large-scale  televising  of  films. 

Radio"  before  the  Electrical  Associa- 
tion of  Philadelphia. 

"There  is  much  room  for  improve- 
ment. Much  needs  to  be  done  in  the 
field  of  distribution  to  the  public.  I 
recognize  that  there  is  a  word  which 
has  been  anathema  to  the  average 
radio  dealer  and  that  word  is  'Can- 
vass.' Webster  says  'Canvass'  means 
'to  seek  or  search,'  and  I  wonder  how 
many  of  us  have  learned  the  art  of 
really  seeking  and  searching  for  a 
prospective  purchaser  of  our  prod- 
ucts.     If    we    are    honest    with    our- 


selves and  turn  on  the  X-ray  lamp 
truth,  must  we  not  confess  that  ac- 
tually we  do  not  sell  our  merchandise 
to  the  consumer — the  consumer 
merely  purchases  from  us. 

"We  very  definitely  face  the  neces- 
sity of  taking  an  honest  inventory  of 
our  selling  organizations.  I  do  not 
mean  to  infer  that  we  haven't  done 
a  good  job  in  selling.  We  have.  The 
radio  industry  has  indicated  a  virility 
and  an  aggressiveness  that  has  been 
the  envy  of  all.  However,  times 
change,  and  it  becomes  necessary  for 
us  to  move  quickly  to  keep  pace  with 
rapid  changes.  Today  we  have  the 
job  not  only  of  selling  our  merchan- 
dise, but  of  selling  'ideas'  which  will 
help  fill  a  tremendous  public  want 
and  need." 

THE  COVER  WAS  A  BUST 

As  if  the  material  on  the  cover  of 
our  October  issue  were  not  diverting 
enough,  a  series  of  outraged  readers 
found  the  time  to  write  in  and  say 
that  we  are  beginning  to  be  editorially 
unclean.  Serry.  By  using  the  bath- 
tub girl  the  editors  meant  only  to  be 
(1)  normal  (2)  interesting  to  some, 
(3)  offensive  to  none. 

Radio  Today  was  always  a  sheet  to 
get  down  to  bare  essentials.  In  the 
case  of  the  blonde,  the  essentials  may 
have  been  too  bare,  but  everybody 
agrees  that  other  pages  were  likewise 
fundamental. 

Although  we  are  half  sold  on  the 
idea  as  an  artistic  proposition,  we 
doubt  whether  we  will  be  mixed  up 
publicly  with  further  nudes.  Winter 
coming  on,  and  all. 


GE  is  determined  to  get  low-down  on  television  news  abroad;  radio  manager 
E.  H.  Vogel,  center,  sails  for  Europe.  Others,  left  to  right,  are  D.  W.  May,  P.  F. 
Hadlock,  A.  A.  Brandt,  Tom  Erwin  of  Maxon,  Inc.,  and  J.  F.  Bahn  of  Rio  de 

Janeiro. 


November,  1938 


11 


'TIS  THE  MONTH  BEFORE  XM AS- 

And  all  through  the  trade,  the  dealers  are  after  the  dough  to  be  made! 


Sure  enough,  a  lot  of  the  radio 
selling  which  has  failed  to  click  so 
far  this  year  will  click  fast  at  Christ- 
mas time. 

Prospects  are  particularly  ripe  for 
radio  selling.  Many  of  them  have 
hesitated  to  order  new  models  before 
this,  and  the  salesmen  now  have  some 
extra  smart  merchandise  that  the 
public  never  heard  of  before.  Thou- 
sands   of    prospects    are    just    begin- 


ning to  have  a  better  time  of  it,  as 
the  winter  business  recovery  gets 
further  along;  their  spending  may 
now  break  loose  for  sure. 

Even  in  a  normal  season,  radio 
dealers  actually  do  20  per  cent  of 
their  annual  business  during  the  last 
ten  days  of  November  and  the  21  pre- 
Ohristmas  selling  days  in  December. 
It's  a  high-powered  period,  and  it 
represents  to   the   retailer   almost   40 


12 


Radio  Today 


Those  Christmas-conscious 
ladies  at  the  left  are  count- 
ing on  complete  radio- 
musical  satisfaction,  plus 
an  important  piece  of  smart 
utility  furniture. 


At  the  right,  another  gift 
bet  —  personal  radios  for 
everybody,  including  porta- 
bles for  gals  who  get 
around. 


Below  is  the  kind  of  scene 
that  radio  dealers  ought  to 
be  proud  of.  Radio  is  a  gift 
that  keeps  families  together. 


per  cent  of  his  annual  profit.  Fig- 
ures like  these  ought  to  build  a  fire 
under  every  radio  man.  Stores  are 
due  for  some  juicy  returns,  if  they 
will  only  exhibit  some  promotional 
energy. 

Thus  it  happens  that  Santa  Claus, 
the  innocent  guy  with  the  whiskers 
who  is  forever  the  friend  of  all  mer- 
chants, turns  out  this  year  to  be  the 
particular  pal  of  the  radio  dealer. 

"This   year  we've  got  merchandise 


which  means  something  to  the  per- 
sonal comfort  of  our  customers,"  one 
radio  man  points  out,  "And  that's  the 
kind  of  stuff  which  goes  well  at  holi- 
day time." 

This  dealer  referred  mostly  to  the 
new  remote  control  and  time-tuning 
devices  which  lately  hit  the  market 
and  dealt  a  blow  to  the  down-run  of 
the  radio  sales  curve.  The  manufac- 
turers have  fixed  things  so  that  the 
matter   of  station-getting  is   a  cinch. 


These  handsome  devices,  when  they 
appear  in  windows  and  on  the  sales 
floors,  have  that  note  of  luxury  and 
ease  which  makes  them  more  personal. 
The  trend  of  radio  design  has  moved 
in  the  best  possible  direction,  as  far 
as  gift  buying  is  concerned. 

Any  consumer  who  has  the  taste  to 
select  one  of  these  new  instruments 
for  a  gift  to  relative  or  friend,  con- 
veys the  idea  that  he  is  genuinely 
trying  to  make  things  easier  and 
happier  for  that  person.  Besides  that, 
any  donor  likes  to  be  identified  with 
a  gift  that  is  styled  to  the  limit.  And 
the  new  radios  certainly  look  like 
they'd  been  fashioned  by  the  sharp- 
est minds  of  modern  industry. 

Xew  tricks  in  cabinetry,  better  de- 
sign of  portables,  smarter  values  in 
personal  sets,  likewise  add  up  to 
added  appeal  of  a  very  tangible  kind. 

More  magic 

The  new  wireless  record  players 
are  another  example  of  important 
Christmas  merchandise  which  has 
never  been  available  before.  Imagine 
demonstrating  one  of  these  astonish- 
ing instruments  with  some  room-fill- 
ing and  jolly  Christmas  music  on  a 
record !  And  these  machines  are  a 
nice  size  for  Yule  packaging.  Be- 
sides being  within  the  price  range  of 
everybody,  and  being  the  kind  of 
merchandise  which  keeps  people 
streaming  back  to  the  store — for  more 
records ! 

Phonograph-radio  combinations  have 
also  been  recently  re-designed  for 
lower-income  groups,  and  represent 
another  brand  new  asset  for  the  dealer 
this  season.  In  many  cases  where 
radios   are   used   as  gifts,   the   instru- 


November,  1938 


13 


ments  are  bought  as  gifts  for  the 
whole  family.  Good  radio  reception 
plus  the  exceptionally  pleasant  vari- 
ety of  recorded  music,  is  100  per  cent 
suitable  for  this  market. 

It  happens  that  most  of  this  new 
merchandise  is  unusually  appropriate 
for  dramatic  demonstrations.  To  the 
folks  who  are  confused  anyway  about 
having  to  think  up  a  number  of  gifts 
for  a  number  of  people,  a  neat  dem- 
onstration of  radio's  amazing  new 
developments  is  Just  exactly  what  the 
public  is  looking  for. 

Tricky  trims 

Apparently  radio  dealers  are  try- 
ing to  get  away  from  holiday  decora- 
tions that  are  complicated.  No 
Christmas  trim  can  be  a  success  just 
because  there's  a  lot  of  it.  Such 
displays  are  apt  to  be  costly  and  look 
garish.  They  require  a  lot  of  time 
and  thought;  they  are  hard  to  keep 
clean. 

Taking  a  tip  from  the  department 
stores  and  from  the  utilities,  many 
radio  men  now  like  the  idea  of  a 
single  Christmas  tree,  or  just  a  pair 
of  candles,  or  a  lone  bell,  for  unit 
displays.  These  effects,  used  with 
striking  lights  and  merry  music,  will 
likely  stop  more  traffic  than  masses 
of  crepe  paper  and  tinsel. 

Notable  among  the  display  motifs 
this  season  will  be  the  World's  Fair 


theine-design.  The  standard  Yule- 
tide  materials  often  need  a  brand  new 
slant,  so  that  windows  and  counters 
will  have  that  up-to-the-minute  qual- 
ity. The  New  York  exposition's  ball- 
and-cone,  which  is  well  passed-around 
now  except  perhaps  on  the  Pacific 
Coast,  is  a  streamlined  trade-mark 
which  may  fit  in  here. 

Gifts  on  the  run 

Service  calls  are  regarded  as  one 
of  the  main  openers-up  of  holiday 
business.  Along  with  the  man  on  the 
repair  job  these  days  goes  a  "per- 
sonal" radio,  wrapped  or  decorated 
with  some  simple  Christmas  trim.  If 
sold  as  a  gift,  the  set  may  be  left  in 
a  package  at  the  buyer's  home,  to  be 
hid  until  time  to  exchange  presents. 
Whether  or  not  the  sale  is  made,  the 
prospect  begins  to  think  about  a 
"radio  Christmas"  and  may  even  de- 
cide to  look  at  consoles. 

With  the  delivery  of  new  sets,  also 
go  some  personal  radios  as  gift  sug- 
gestions. In  some  cases,  the  manu- 
facturers have  already  packaged  sev- 
eral radios  for  this  purpose,  but  in 
cases  where  single  consoles  are  sold, 
the  radio  man  may  suggest  the  extras. 

Where  home  demonstrations  are 
staged  as  sales  promotion  for  family 
gifts,  the  radio  man  has  some  extra 
explaining  to  do.  The  buyer  of  the 
family   may   be   given   to   understand 


At  the  left,  she's  wonder- 
ing how  to  get  a  GE  con- 
sole into  her  husband's  sock 
on  Christmas  Eve.  Or  the 
family   sock. 


At  the  right,  top,  a  bright 
spot  on  anybody's  gift  list 
— Brunswick's  new  "Tav- 
ern Table"  radio,  cabineted 
in  maple. 


At  the  right,  bottom,  an  in- 
strument illustrating  top 
qualities  as  a  gift  for  musi- 
cal families  —  great  music 
via  radio  and  records. 
Daughter  likes  the  Mystery 
Control. 


that  although  the  appearance  of  the 
set  in  the  home  may  take  the  "sur- 
prise" edge  off  the  gift,  yet  it  can  be 
managed  so  that  the  family  gets  in- 
tensely interested  in  whether  the  re- 
ceiver will  be  kept  or  returned  to  the 
store.  The  decision  to  be  made  by 
the  prospective  donor  then  becomes 
the  actual  gift. 

There  are  a  lot  of  brisk  new  ideas 
for  the  dealer's  direct  mail  advertis- 
ing this  year.  In  the  first  place,  a 
red-and-green  appearance  of  the  let- 
ters should  make  them  different  from 
all  other  letters  so  that  the  main  idea 
of  radio-for-Christmas  instantly  gets 
across. 

Via  the  mails 

To  the  pieces,  some  dealers  will 
paste  a  sample  of  the  initial-stickers 
which  are  available  for  those  who 
want  their  initials  signet-style  on 
their  receivers.  This  is  fine  for  those 
retailers  who  are  worried  about  con- 
vincing prospects  that  radio  sets  are 
personal  enough  to  use  as  Christmas 
gifts. 

Then  there's  the  idea  of  using  tes- 
timonials. These  are  copies  of  let- 
ters written  presumably  last  year,  by 
those  who  received  radios  for  Christ- 
mas. The  delight  of  these  writers, 
as  expressed  simply  and  heartily  to 
the  person  who  was  thoughtful  enough 
to  give  them  a  set,  does  a  fine  selling 
job. 


14 


Radio  Today 


;<-:;?:. 


CHRISTMAS 

RADIOS  FOR 

EVERYBODY- 

Here' 

s    how 

your    customers'    radio    gift 

tags  s 

iould  read: 

For 

Mother's  kitchen 

For 

Sonny 

s  own   room 

For 

Dad's 

desk 

For 

our  fireside 

For 

Brother  to  take  to  college 

To 

play   in 

Grandmother's  bedroom 

For 

beside 

Aunt  Mary's 

chair 

So 

Johnny 

can   hear  The 

Lone  Ranger 

Gift  lists,  left  blank  except  for 
radio  suggestions,  are  also  OK  if  they 
are  accompanied  by  pleasant  invita- 
tions to  call  at  the  radio  shop  and 
settle  the  gift  problem. 


Special   fines    of   action 

Another  thing  to  remember  in  a 
mail  campaign  is  that  the  persons 
addressed  may  be  members  of  the 
nation-wide  Christmas  Club — people 
who  are  to  get  a  part  of  the  $350,- 
000,000  distributed  about  Dec.  1  each 
year.  To  selected  groups  of  names,  a 
snappy  mailing  on  possible  radio  ex- 
penditures will  be  profitable  about 
this  time. 

Announcements  on  when  and  how 
long  the  radio  store  is  open  evenings 
during  this  shopping  period  is  also 
reason  for  a  promotion  piece.  This 
may  mean  that  extra  demonstrations, 
at  home  or  at  the  shop,  am  convenient 
and  welcome.  It  will  interest  a  large 
group  of  people  whose  business  day 
ordinarily  ends  simultaneously  with 
that  of  the  radio  man. 

Finally,  one  of  the  best  ways  for 
a  dealer  to  get  himself  whole-heart- 
edly behind  the  idea  of  "radio  for 
everybody"  is  to  see  that  all  the  mem- 
bers of  his  own  family  have  personal 
sets.  Then  he  may  note  the  down- 
to-earth  details  on  how  it  works  out 
in  real  household  life.  The  idea  should 
result  in  special  ideas  for  mailings 
and  other  promotions. 

November,  1938 


wm/> 


One-piece  stumpwood. 


Figured  rotary — rim  type. 


Standard  striped.  Quarter  sliced,  matched. 

Some  of  the  types  of  walnut  most  frequently  used  in  radio  cabinets — the  figured  woods  which  help  dealers  sell  "furniture.'1 


FACING  THE  FURNITURE  FACTS 

What  radio  salesmen  should  know  about  cabinet  designs  and  woods 


Every  radio  dealer  likes  to  have 
features  to  sell  that  are  really  differ- 
ent from  other  receivers. 

One  way  is  to  get  a  model  that  has 
authentic  design,  with  appropriate 
woods  properly  finished  and  put  to- 
gether in  the  traditional  way. 

These  models  look  special  on  the 
dealer's  floor.  They  attract  people 
who  have  money,  they  are  not  mixed 
up  with  price-cutting,  and  they  dig- 
nify the  business.  In  point  of  profit 
to  the  radio  man,  they  pile  up  very 
well  with  the  highly-polished,  mass- 
produced  radios  which  invite  nothing 
but  indifference  from  the  folks  who 
live  in  the  big  house  on  the  hill. 

But  the  radio  man  must  know  how 
to  sell  this  stuff.  The  persons  who 
are  going  to  buy  them  are  not  inter- 
ested in  brazen  price  quotations  and 
loud  announcements  about  the  num- 
ber of-  tubes.  More  likely,  they  will 
quietly  talk  about  genuine  furniture 


values.  The  radio  man  had  better  be 
prepared  for  a  chat  about  Chippen- 
dale. 

Without  spending  too  much  time 
and  effort,  radio  merchants  can  pick 
up  the  furniture  essentials.  They  are 
dealing  in  merchandise  that  is  sup- 
posed to  improve  the  modern  home — 
they  ought  to  have  the  data  anyway. 

A  profitable  project 

One  of  the  first  things  to  do  is  to 
absorb  the  dope  on  designs  connected 
with  the  18th  century.  This  is  the 
period  that  is  the  most  important, 
commercially.  This  amounts  to  read- 
ing up  on  the  English  style-setters 
Queen  Anne,  Chippendale,  Duncan 
Phyfe,  Hepplewhite,  Adam,  and 
Sheraton;  also  the  French  leaders  of 
that  time,  Louis  XIV,  Regency,  Louis 
XV,  Louis  XVI,  and  Empire. 

The  dealer  should  learn  to  recog- 
nize  these,    and   to   detect   traces   of 


CABINETS    EXPLAINED     (English  Periods) 
Style  Dates  Sovereign 

Tudor 1  509-1 557 .  .  Henry  VIII 

Elizabethan 1  558-1 603  .  .  Elizabeth 

Jacobean 1 603-1 688 .  .  James  I,  Charles  I,  Commonwealth, 

Oliver  Cromwell,  Charles  II, 

James  II. 

William  and  Mary 1 688-1 702    .  William  and  Mary 

Anne 1702-1714.  .Queen  Anne 

Decorated  Queen  Anne 1714-1727.    George  I. 

Chippendale  and  Hepplewhite.  1727-1  760.  .George  II. 

Adam  and  Sheraton 1760-1820.    George  III. 

Regency 1 820-1 830 .  .  George  IV. 


them  in  designs  that  are  not  pure. 
He  should  be  able  to  distinguish  the 
basic  characteristics  and  to  say  gen- 
erally how  they  came  about. 

Trends  in  design  that  came  before 
this  period,  or  after,  can  be  studied 
later  if  the  business  justifies  it. 

Practical  procedure 

The  suggested  line  of  action  for  the 
average  radio  man  also  includes 
spending  a  certain  amount  of  time 
at  the  public  library,  for  detailed  in- 
formation. Some  radio  men  have 
found  it  valuable  to  sketch,  free  hand, 
the  basic  lines  connected  with  the 
most  important  styles. 

Many  of  the  leading  radio  manufac- 
turers have  several  period-style  cab- 
inets in  their  lines.  In  most  cases, 
they  are  careful  to  furnish  data  on 
the  styles  used;  the  dealer  must  make 
certain  that  this  is  clear  to  him,  and 
that  he  can  interpret  it  on  the  sales 
floors.  He  should  examine  the  mer- 
chandise carefully  and  be  certain 
that  it  adds  up  with  the  facts  as 
presented  by  research  experts.  It  is 
rumored  around  the  trade  that  some 
of  the  so-called  period  models  on  the 
market  are  altogether  out  of  propor- 
tion. 

Various  wood  associations  such  as 
the  American  Walnut  Manufacturers 
Association,  at  616  S.  Michigan  Ave., 
Chicago,  or  the  Mahogany  Associa- 
tion, Inc.,  75  E.  Wacker  Drive,  Chi- 
cago or  the  Furniture  World  Insti- 
tute, 212  Lexington  Ave.,  New  York 
City,  are  alertly  interested  in  the 
subject  of  period  furniture.  They 
have  done  endless  work  on  this  mat- 
ter, as  well  as  on  the  subject  of  woods 
and  finishes. 

(Continued  on  page  48) 


16 


Radio  Today 


TELEVISION  NEXT  SPRING 

Radio  trade  looks  forward  to  new     video     merchandise 


The  development  of  television,  as 
merchandise  which  dealers  may  even- 
tually present  to  the  public,  was 
given  a  new  aspect  last  month.  From 
a  meeting  of  the  Radio  Manufactur- 
ers Association,  RCA  announced  that 
television  sets  will  be  available  for 
the  public  by  next  April. 

Although  the  announcement  is 
backed  by  many  millions  invested  in 
experiments,  the  radio  trade  realizes 
that  many  problems  still  confront 
the  new  industry. 

President  D'avid  Sarnoff  of  RCA 
has  made  the  following  statement: 

"ECA  believes  that  the  develop- 
ment of  its  television  system  has  now 
reached  a  stage  where  it  is  practicable 
to  supply  television  receivers  to  sat- 
isfy the  demand  of  the  public  in  those 
localities  where  television  transmis- 
sions are  now  or  may  become  avail- 
able. Therefore,  it  is  planning  to 
manufacture  a  limited  quantity  of 
television  receivers  which  it  expects 
to  market  by  the  time  the  World's 
Fair  opens.  We  are  informed  that  a 
number  of  other  radio  manufacturers 
in  the  United  States  are  also  pre- 
paring to  manufacture  and  sell  tele- 
vision receivers  in  such  areas  as  may 
be    served   with    television    programs. 

New  York  area  first 

"We  are  aware  that  many  techni- 
cal, artistic  and  financial  problems 
still  confront  those  who  would  estab- 
lish an  acceptable  and  regular  public 
service  of  television  programs  to  the 
home.  These  problems  must  be  solved 
before  a  national  service  of  network 
television  programs  can  be  made 
available  to  the  public.  Meanwhile, 
RCA,  which  has  pioneered  in  the  de- 
velopment of  television,  has  made 
substantial  progress,  first  in  its 
research  laboratories,  and  second, 
through  its  field  tests  and  experi- 
mental broadcast  programs.  We  be- 
lieve that  the  problems  confronting 
this  difficult  and  complicated  art  can 
be  solved  only  by  operating  experi- 
ence gained  from  actually  serving 
the  public  in  their  homes.  There- 
fore, RCA  proposes  to  take  a  third 
step    in   the    solution    of   these    prob- 

These  days  the  public  can  see  television 

sets   in   operation  at   NBC    studios   in 

New  York.  This  RCA  unit  has  a  glass 

panel  to  provide  an  extra  view. 


lems  by  beginning  a  limited  program 
service  to  the  public  from  its  New 
York  television  transmitter  on  the 
Empire  State  Building.  This  trans- 
mitter will  serve  an  area  having  a 
radius  of  approximately  fifty  miles." 

Impact  on  the  trade 

Dealers  and  distributors  immedi- 
ately wanted  to  know  "how  will  all 
this  affect  the  sale  of  broadcast  re- 
ceivers ?" 

To  this,  George  K.  Throckmorton 
of  RCA- Victor  explained  that  re- 
ceivers purchased  now  may  be  used  to 
furnish  the  sound  part  of  television, 
with  an  extra  accessory  providing  the 
image  reception.  There  is,  therefore, 
no  reason  why  today's  radio  sales 
should  drop. 

The  question  of  what  radio  sales- 
men should  tell  their  hesitant  custom- 
ers was  also  answered.  Many  of  the 
new  radios  will  be  marked  with  a  no- 
tice explaining  that  the  instruments 
may  be  used  as  part  of  television  re- 
ception. 


Radio  business  men  also  wanted  to 
know  when  they  might  expect  televi- 
sion service  in  their  areas.  The  reply 
to  this  is  "when  at  least  one  station 
in  your  area  is  willing  to  undertake 
the  heavy  financial  and  other  respon- 
sibilities attendant  upon  the  estab- 
lishment of  a  regular  program  service 
to  the  public.-' 

Factors  in  the  field 

Meanwhile,  a  second  New  York 
television  transmitter,  the  Columbia 
Broadcasting  Co.'s  W2XAK  on  the 
Chrysler  Building  is  being  completed 
and  plans  to  be  on  the  air  early  next 
year. 

The  Allen  B.  Du  Mont  Labora- 
tories, Upper  Montclair,  N.  J.,  has 
been  given  a  construction  permit  by 
FCC  for  a  new  television  transmitter. 
Some  hundred  Du  Mont  receivers  are 
in  process  of  manufacture  and  a  num- 
ber have  already  been  demonstrated 
in  New  York  stores. 

(Continued   on  page  54) 


November,  1938 


17 


DEMONSTRATE  ANYTIME! 

"Wireless  players"  provide  programs  for  sets 


For  demonstrations  when  BC  pro- 
grams can't  be  had,  dealer  can  "make 
his  own  broadcasting"  with  wireless 
record  player.  Photo  shows  this  stunt 
in  progress  with  Sonora's  "mystic  mu- 
sic maker"  at  Ludwig  Bauman's  8th 
Ave.  store,  NYC. 


Very  often  radio  dealers  have  diffi- 
culty in  finding  programs  suitable  for 
demonstrating  sets  to  prospective  cus- 
tomers. In  other  instances,  the  deal- 
er's location  may  be  poor,  so  that  it 
is  impossible  to  receive  broadcasts 
that  are  entirely  free  from  noise. 

The  new  wireless  record  players  now 
give  the  radio  dealer  a  miniature 
broadcasting  station  of  his  own,  and 
which  will  work  with  any  receiver  in 
his  store  without  direct  connections  or 
changeover  switches. 

All  the  dealer  has  to  do  is  plug  the 
record  player  in  the  power  line  and 
adjust  its  frequency  to  such  an  un- 
used channel  in  the  locality  so  as  to 
prevent  interference.  Symphonies, 
swing,  operas,  or  what  have  you,  are 
then  at  the  dealer's  disposal — in  fact 
the  only  limit  on  the  program  mate- 
rial is  the  dealer's  selection  of  rec- 
ords! 

Set  button  for  phono-channel 

Radio  sets  to  be  demonstrated  are 
then  turned  to  the  record  player's  fre- 
quency. Push-button  sets  may  even 
have  on  button  adjusted  to  the  rec- 
ord player  for  instantaneous  tuning. 


A  brand  new  wireless  record  player  by 
Morlen  Electric  Co.,  60  W.  15th  St., 
NYC.  Features  include  volume  control, 
motor  on-off  switch,  covered  needle- 
cup.     Walnut  finish.     List  $24.95. 


Since  no  connecting  wires  are  needed, 
any  set  will  operate  from  the  record 
player.  Comparisons  between  various 
sets  can  be  easily  made  by  turning 
down  the  volume  on  one  set  while 
turning  it  up  on  the  other. 

For  the  better  type  receivers,  clas- 
sical music  is  probably  the  best  pro- 
gram material  since  it  has  a  wide 
range  of  notes  and  volume.  If  the 
volume  controls  are  so  adjusted  that 
the  better  receiver  will  just  handle  the 
loud  or  fortissimo  passages,  then  it  is 
possible  to  demonstrate  its  power  cap- 
ability. Naturally  a  set  with  less  pow- 
er output  at  the  same  average  volume 
level  will  distort  on  the  loud  passages 
— in  this  way  it  is  possible  to  demon- 
strate the  need  for  ample  power. 


Paul  S.  Gay  and  C.  M.  Wilcox,  who  exhibited  their  wireless  record  player  as  far 
back  as  the  Radio  Trade  Show  in  Chicago  last  June,  initiating  this  now  fast-selling 

radio  adjunct. 


Overloading 

In  order  to  avoid  overloading  of  the 
record  player  transmitter  unit,  the 
dealer  should  first  determine  how  high 
he  can  advance  the  volume  control  on 
the  record  player  without  causing 
overload  on  the  particular  record  used. 
This  adjustment  is  as  simple  as  set- 
ting a  receiver's  volume  control. 

Technically  inclined  dealers  can  use 
some  of  the  frequency  records  that  are 
available,  for  determining  the  approx- 
imate frequency  response  of  various 
sets.  Likewise,  radio  servicemen 
should  be  able  to  make  good  use  of  the 
wireless  record  players  for  checking 
the  characteristics  of  the  receivers 
after  they  have  been  repaired.  Since 
the  signal  is  picked  up  in  the  antenna 
circuit,  such  a  test  provides  an  over- 
all check  on  the  receiver. 

The  low  cost  of  these  wireless  rec- 
ord players  makes  it  possible  for  every 
dealer  to  use  one  for  demonstrating 
his  sets  when  the  regular  broacasts  are 
unsatisfactory  for  this  purpose.  Also 
the  use  of  the  device  for  demonstra- 
tions should  go  a  long  way  in  build- 
ing up  sales  of  the  units  for  use  in 
homes. 


18 


Radio  Today 


1 


Created  By  the  Sure 
Hand  of  Experience! 


Dealers  everywhere  have  asked  for 
this  new  version  of  Sparton, 
wrought  in  Midnight  Blue  Mirror 
Glass  like  its  amazingly  success- 
ful predecessor  —  the  Sparton 
Bluebird  model.  And  now  it  is 
ready  for  Christmas  selling  —  a 
merchandising  triumph  that  will 
sell  at  an  accelerated  pace  as  thou- 
sands are  given  the  opportunity  to 
appraise  and  appreciate  its  beauty 
and  surpassing  performance. 


5  NEW 

BLUE  Mirror  GLASS 
Personal    Radio 


"CYNOSURE"  OF  ALL  EYES 


Style  Leader 
of  All  Radios 

Here  is  beveled  Midnight  Blue 
Mirror  Glass  modeled  in  a  rhyth- 
mic, modern  design  enriched  with 
touches  of  silver  glints  and  ebony 
black.  It  is  a  magnificent,  artistic 
coalition  of  contour  and  colors 
...  a  worthy  successor  to  the 
widely  accepted  Sparton  Bluebird 
Model  ...  a  radio  thoughtfully 
designed  to  harmonize  with  all 
interiors,  whether  modern  or  tra- 
ditional. Truly  an  original  and 
imaginative  gift  whose  beauty  and 
character  are  too  elusive  to  be 
trapped  in  words.  It  is  featureful, 
too,  with  5-tube  (with  ballast) 
AC-DC  chassis  and  rich-tuned  dy- 
namic speaker. 


FREE 
DISPLAY 


T<&^% 


The  stunningly  beautiful  display  unit  shown  above 
is  given  FREE  to  all  Sparton  dealers.  The  display 
lends  itself  to  dramatic  use  in  show  window  or  store, 
and  it  has  the  power  of  creating  sales  because  it 
glorifies  the  smartest  radio  yet  to  reach  the  market. 

Ready  Now  For  Immediate  Delivery. 
THE    SPARKS-WITHINGTON     COMPANY, 


Priced  tar  the  Modest 

aft  Budget  Sfft 95 


Western  Prices 
Slightly  Higher 

JACKSON,     MICHIGAN 


November,  1938 


19 


1939  AUTO-RADIO 

Push-button  tuning   universal;  cowl  antennas 
Simpler  means  of  station  setting;  prices  down 


With  the  New  York  Automobile 
Show  again  holding  the  nation's  at- 
tention, public  and  trade  interest  is 
attracted  by  the  new  auto-radio  fa- 
cilities provided  for  the  1939  cars. 
Radio  Today  here  presents  a  look- 
behind-the-scenes  of  the  auto-radio 
situation  for  the  coming  year,  point- 
ing out  the  new  developments  in  car- 
receivers  and  installations,  which  will 
be  of  interest  to  radio  men. 

Springtime  in  1938  was  really  the 
development  period  for  present  1939 
automobiles  and  their  accessories, 
the  biggest  sales  unit  of  which  is  the 
radio  set.  Last  Spring,  of  course,  a 
dark  cloud  of  pessimism  hung  over 
the  automotive  industry,  with  sales 
way  down  in  sympathy  with  the 
nation-wide  recession.  But  engineer- 
ing proceeded  as  usual.  If  there  were 
going  to  be  any  auto-radio  sales  in 
connection  with  the  1939  car  models, 
the  manufacturers  were  not  risking 
unpreparedness.  High  spots  in  this 
development  program  are  herewith 
discussed  and  trends  pointed  out. 

The  antenna  designer  is  end-man 
in  the  game  of  Snap-the-Whip.  Au- 
tomobile stylists,  body  designers, 
chassis  engineers — all  concentrate  on 
the  appearance,  performance  and  low 
cost  of  the  automobile.     When  this  is 


all  finished,  the  antenna  man  must 
cudgel  his  brain  to  find  a  few  micro- 
volts of  signal  with  a  device  that 
shall  be  heard  and  not  seen.  In  1938 
he  had  running  boards  under  which 
he  could  conceal  his  antenna,  or 
which  he  could  insulate  so  that  they 
alone  were  the  antenna  system.  But 
running  boards  on  1939  cars  are  either 
optional  or  rudimentary,  so  that  there 
is  little  choice  but  to  use  some  sort 
of  cowl-mounted  fish-pole.  Then,  too, 
the  body  men  learned  that  the  best 
way  to  avoid  rattles  was  to  eliminate 
possible  contact  between  body  compo- 
nents except  at  structurally  needful 
points,  and  to  use  rubber  liberally  at 
these  points.  Consequently  consid- 
erable ignition  interference  is  radi- 
ated right  near  the  antenna,  so  that 
only  by  some  pretty  clever  filter  and 
wave-trap  design,  coupled  with  com- 
plete absence  of  receiver  chassis 
pickup,  can  there  be  a  clear  path  for 
signals. 

Circuits 

Costs  had  to  be  kept  at  new  lows  in 
these  1939  designs.  Consequently  some 
of  the  1938  circuit  tricks,  conceived 
mainly  as  talking  points,  have  been 
dropped  in  favor  of  the  simplest 
means  for  obtaining  good,  honest  per- 


THE  FOOTBALL  RADIO  SEASON  WORKS  UP  TO  NEW  INTEREST  PEAK 


-■\     &fcJ 


Practically  everybody  is  a  college  parent,  a  college  alumnus,  or  a  college  student. 
Here's  how  Sales  Furniture  Co.,  Louisville,  Ky.,  got  in  on  the  varsity  football 
interest,  by  building  a  feature  window  using  many-colored  Stewart-Warner  sets. 


formance.  This  policy  has  given  the 
1939  sets  more  undistorted  output  and 
greater  sensitivity  per  dollar  of  cost 
than  ever  before. 

Speakers 

The  1938  acceptance  of  instrument- 
panel  speaker  location  put  pressure 
on  the  body  designers  to  provide  more 
speaker  space.  Consequently,  8-inch 
speakers  have  replaced  6-inch  units 
in  some  cases,  and  auxiliary  instru- 
ment-panel speakers  are  supplement- 
ing dash-mounted  speakers  in  others. 
The  policy  of  tailoring  speaker  re- 
sponse to  the  acoustic  needs  of  par- 
ticular body  types  has  been  particul- 
arly stressed.  The  universal  use  of 
push-button  control  has  crowded  some 
of  the  receiver  components  off  the 
instrument  panel,  so  that  it  has  be- 
come necessary  to  put  power  supply 
units  in  the  dash-speaker  case,  where 
such  speakers  are  used,  or  in  sepa- 
rate dash-mounted  cases  where  instru- 
ment-panel speakers  are  employed. 

Tuning  controls 

Push-button  control  is  the  un- 
broken rule  in  the  new  sets.  Some 
wonderful  ingenuity  has  been  dis- 
played, and  the  few  mechanical  bugs 
found  in  the  1938  button  controls 
have  been  eliminated.  Direct  me- 
chanical drive  from  buttons  to  gang- 
condenser  rotor  leads  in  popularity, 
but  some  of  the  swankier  sets  enjoy 
solenoid  or  motor-driven  condenser 
rotors,  or  single-button  selection  of 
preset  fixed-tuned  circuits. 

Much  effort  has  been  expended  to- 
ward simplifying  the  task  of  setting 
up  the  push  buttons.  A  year  ago 
this  was  strictly  a  service  man's  job, 
and  a  thankless  one,  for  it  was  an 
added  item  in  installation  and  was 
never  paid  for  separately.  Most  of 
this  year's  tuning  systems  are  de- 
signed to  be  set  up  by  the  owner.  The 
easiest  type  to  set  up  is  one  wherein 
the  tuning  buttons  may  be  pressed 
beyond  the  normal  tuning  stop  and 
caused  to  declutch  the  gang  con- 
denser, after  which  any  desired  sta- 
tion is  manually  tuned.  Upon  releas- 
ing the  button,  that  station  is  hence- 
forth set  up  for  that  button,  and  its 
subsequent  pressing  will  always  se- 
lect that  channel.  Frequency-drift 
troubles  are  mainly  thermal  in  their 
origin,  and  frequency  stabilization 
has  received  much  consideration.  One 
novel  scheme  is  to  seal  the  I.F.  coils 
into  an  exhausted  glass  tube,  forever 
safe  from  humidity  effects  and  free 
from  sudden  temperature  changes. 
Temperature-compensated  trimmers 
and  separate  compensating  condensers 
are  likewise  employed. 


20 


Radio  Today 


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— x     Radio  Tube 
i^^/       Co.,   Newark, 
^^^^^      New  Jersey. 

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*        your    Equipment    Deal 
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^         Dealer    Helps    folder. 


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November,  1938 


21 


NEW  XMAS  MERCHANDISE 

Latest   news   of  radio   products    from   manufacturers 


G-E  consoles 

*  7-tube  AC  superhet  tuning 
540-1,750  and  55,700-18,300  KC.  12- 
inch  dynamic  speaker.  Keyboard 
touch-tuning  with  6  keys.  Cathode- 
ray  tuning  indicator.  Louvre  dial 
with  individual  scales.  Tone  mon- 
itor circuit.     Model  G-75. 


Push-button  receiver  with  touch 
tuning  for  6  stations.  Power-line 
switch  automatically  operated  by 
depressing  station  keys.  3  band  op- 
eration—540  to  18,300  KC.  Power 
output  of  5  watts,  4-point  tone-fidel- 
ity control.  Model  G-76.  General 
Electric  Co.,  1285  Boston  Ave., 
Bridgeport,  Conn. — Radio  Today. 


Miracle  dial  receiver 

*  6-tube  AC  superheterodyne  re- 
ceiver with  miracle  tone  chamber 
and  full-vision  dial.  6j^-inch  dy- 
namic    speaker.       Dynamic-coupled 


power  output  of  5  watts.  Hand- 
rubbed  walnut  cabinet.  Model  BW- 
231— list  $39.95.  Emerson  Radio  & 
Phonograph  Corp.,  Ill  Eighth  Ave., 
New  York,  N.  Y. — Radio  Today. 


Little  Nipper  receivers 

it  Series  of  low-cost  receivers  in 
plastic  and  wooden  cabinets.  5-tube 
AC-superhet  chassis  with  illuminat- 
ed dial,  dynamic  speaker,  and  metal 
tubes.  Illustrated  at  the  top  is 
model  9TX2  listing  at  $12.95.  Model 
9TX3  at  the  bottom  lists  for  $14.95. 
RCA  Mfg.  Co.,  Front  and  Cooper 
Sts.,  Camden,   N.  J. — Radio   Today. 


Philco  receiver 

*  6-tube  receiver  with  push  but- 
ton tuning  of  8  stations  and  manual 
tuning  with  finger  tip  disc  controls. 
Spinet  type  furniture  cabinet. 
Streamline  dial,  inclined  panel,  va- 
riable tone  control  and  bass  com- 
pensation. Model  36-XX— list  $79.95. 
Philco  Radio  &  Television  Corp., 
Tioga  and  C  Sts.,  Philadelphia,  Pa. — 
Radio  Today. 


Tube  shields 

*  Line  of  radio  tube  shields  to 
fit  new  1.4  volt  tubes  and  bantam 
types.  Goat  Radio  Tube  Parts, 
Inc.,  314  Dean  St.,  Brooklyn,  N.  Y. 
— Radio  Today. 


Chairside  combination 

*  8-tube  superhet  receiver  with 
automatic  record  changer.  Cathode- 
ray  tuning  eye.  12-inch  speaker. 
Tunes  broadcast  and  shortwave 
bands.  AC  model — list  $185.  AC-DC 
—$189.50.  Push-button  tuning  for 
slight  additional  cost.  Storage  space 
for  records.  Portomatic  Corp.,  1013 
Madison  Ave.,  New  York,  N.  Y. — 
Radio  Today. 




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DeWald  Bantam 

•k  Miniature  table  type  receiver 
in  plastic  cabinet.  Tuned  radio 
frequency  circuit.  Tunes  165  to  555 
meters.  Illuminated  dial — PM 
speaker.  In  Ivory,  Red,  and  Blue. 
Model  406.  Pierce-Airo,  Inc.,  440 
Lafayette  St.,  New  York,  N.  Y  — 
Radio  Today. 


"*~?<3?P- 


Travelette  portable  radio 

*  Superheterodyne,  battery-oper- 
ated portable  set  for  all  indoor  and 
outdoor  uses.  Built-in  loop  used  for 
antenna.  Can  be  used  as  an  auto 
radio.  Long-life,  self-contained  bat- 
teries. Uses  new  ljX-volt  tubes.  Air- 
plane cloth  carrying  case — weighs 
17j/£  pounds.  Mission  Bell  Radio 
Co.,  833  Venice  Blvd.,  Los  Angeles, 
Calif. — Radio  Today. 


22 


Radio  Today 


Wireless  record  player 

*  AC  type  wireless  record  player 
attachment  for  use  with  any  radio 
set.  Works  over  distances  up  to 
20  feet.  Plays  records  up  to  12 
inches.  Radio  set  tuned  to  fre- 
quency of  record  player  for  phono- 
graph operation.  Allied  Radio  Corp., 
833  W.-  Jackson  Blvd.,  Chicago,  111. 
— Radio  Today. 


Stromberg  corner  radios 

■*•  Corner  cabinet  type  sets  now 
available  in  walnut.  Model  350V  is 
a  large  high-fidelity  receiver.  Model 
340-W  is  a  smaller  set  listing  at 
$125.  Chassis  has  9  tubes.  Flash 
tuning  with  push  bottons  for  8  sta- 
tions. Labyrinth  for  better  tonal 
quality.  Stromberg-Carlson  Tele- 
phone &  Mfg.  Co.,  100  Carlson  Rd., 
Rochester,  N.  Y. — Radio  Today. 


Vertical  antenna 

+  Home  type  vertical  antenna 
with  universal  bracket  that  permits 
mounting  of  antenna  at  any  point 
on  house  or  window.  Non-direction- 
al. Cadmium  plated — 4  sections — 
extends  to  12  feet.  Supplied  with 
40  feet  of  lead-in  wire.  Model 
3071RA— list  $3.50.  J.  P.  D.  Mfg. 
Co,  4111  Ft.  Hamilton  Pky.,  Brook- 
lyn, N.  Y. — Radio  Today. 


Ham  band  antenna 

+  Noise-reducing  antenna  sys- 
tem designed  for  use  on  the  10,  20, 
40  and  80-meter  amateur  bands. 
Size  of  antenna  reduced  from  70 
to  40  feet  for  peaked  operation  on 
40  meters  through  use  of  loading 
coils.  On  10,  20,  and  40  meters  an 
average  signal  strength  increase  of 
7  to  11  DB  is  gained  when  com- 
pared with  untuned  doublets.  Type 
165.  Technical  Appliance  Corp.,  17 
E.  16th  St.,  New  York,  N.  Y.— Radio 
Today. 


Espey  record  player 

*  Wireless-operated  record  play- 
er for  use  with  all  radios.  No  wires 
to  attach  to  radio  set.  Simply  con- 
nect to  power  line  circuit.  Plays 
through  radio  set  just  like  a  broad- 
casting station  does — no  wiring 
changes  needed.  Crystal  type  pick- 
up and  constant-speed  motor.  Espey 
Mfg.  Co.,  Inc.,  67  Irving  Place,  New 
York,  N.  Y. — Radio  Today. 


RCA-Victor  console 

*  Low-cost  console  radio  housed 
in  luxurious  cabinet  of  rare  woods. 
Provides  domestic  and  foreign  re- 
ception. 7-tube  chassis  with  magic 
eye.  Push  button  tuning  with 
Victrola  button — straight-line  dial. 
Variable  tone  control.  Power  out- 
put of  4J4  watts.  Model  97K— list 
$75.  RCA"  Mfg.  Co.,  Front  &  Cooper 
Sts.,  Camden,  N.  J. — Radio  Today. 


Tube  tester 

*■  Dynamic  mutual-conductance 
tube  tester  with  multi-range  meter. 
Push-button  operation.  AC-DC 
voltage  ranges  of  0/10/50/250/1000 
volts.  DC  mils:  O/1/10/50/259/- 
10M.  Resistance  ranges  of  0/40/- 
lOOM/lmeg/lOmeg.  Also  decibel 
and  output  ranges.  Model  900.  Pre- 
cision Apparatus  Corp.,  821  E.  New 
York  Ave.,  Brooklyn,  N.  Y. — Radio 
Today. 


9-inch   videotron 

*  Cathode-ray  television  receiv- 
ing tube  with  a  9-inch  medium  per- 
sistence screen.  Ceramic-mounted 
gun,  supported  by  mica  springs. 
Produces  black  and  white  pictures. 
High  brilliance  and  no  defocussing 
at  extreme  of  sweep.  Type  2109. 
National  Union  Radio  Corp.,  30 
State  St.,  Newark,  N.  J.— Radio  To- 
day. 


Mobile  sound  system 

*  30-watt  sound  system  for  op- 
eration from  storage  battery  or  AC 
power  line.  Amplifier  gain  of  122 
DB.  System  supplied  with  dual  12- 
inch  PM  speakers  with  aluminum 
dome  baffles.  Turntable  for  phono- 
graph operation.  Wholesale  Radio 
Service  Co.,  100  Sixth  Ave.,  New 
York,  N.  Y. — Radio  Today. 


Supreme   Lab-rack 

*  Service  laboratory  in  a  square 
foot  of  bench  space.  Units  illus- 
trated are:  top,  596  resistance  and 
capacitance  substitution  box;  592 
multi-range  meter;  594  tube  tester 
unit  utilizing  good-bad  meter  on 
set  tester;  593  analyzer  unit  at 
bottom  which  is  used  with  the  592 
multi-range  meter.  Push-button  type 
of  switches  used  in  all  instruments. 
Supreme  Instruments  Corp.,  Green- 
wood, Miss. — Radio"  Today. 


Portable  sound  system 

*  5-watt  sound  system  with  2 
speakers,  and  microphone  with  25- 
feet  of  cord.  Entire  unit,  with  gray 
metal  carrying  case  weighs  15 
pounds.  Ballyhoo  portable  P.A. 
unit.  Operadio  Mfg.  Co.,  St.  Charles, 
111. — Radio  Today. 


November,  1938 


23 


MORE  NEW  THINGS 


Transmitting  capacitors 

*  High-voltage  condensers  for 
use  in  transmitters  and  television 
receivers.  Hermetically-sealed  in 
round  aluminum  containers,  impreg- 
nated and  filled  with  non-inflam- 
mable dykanol  oil.  TQ  series  avail- 
able in  ratings  from  1  mike  600 
volts  to  2  mike  2,000  volts.  Cornell- 
Dubilier  Corp.,  S.  Plainfield,  N.  J  — 
Radio  Today. 


C-B  microvolter 

*  Oscillator  unit  tuning  100  to 
30,000  KC  having  output  calibrated 
from  y2  to  100,000  microvolts.  Pro- 
vides a  yardstick  of  receiver  per- 
formance in  terms  of  sensitivity  and 
gain.  Lattice-wound  non-inductive 
attenuator  resistors,  copper  internal 
shielding.  Model  199.  Clough- 
Brengle  Co..  2815  W.  19th  St.,  Chi- 
cago, 111. — Radio  Today. 


PHANTOM 

INSTALLATION 

DIAGRAM 


Multiple  antenna  system 

*  All-wave  antenna  system  for 
apartment  buildings,  schools,  insti- 
tutions, hotels,  etc.  Provides  noise- 
free  reception  on  all  wavelengths. 
Each  antenna  handles  up  to  20  sets 
— uses  no  tubes.  Designed  for  in- 
stallation in  building  during  the 
construction.  Concealed  wiring  us- 
ing standard  wiring  materials. 
General  Electric  Co.,  1285  Boston 
Ave.,  Bridgeport,  Conn. — Radio  To- 
day. 


Resistor  tester 

*  Test  unit  for  checking  condi- 
tion of  plug-in  line  resistors  and 
line  cord  resistors  used  in  AC-DC 
sets.  Enclosed  in  a  steel  case.  Has 
attractive  panel  carrying  meter, 
octal  socket  and  UX  socket.  Standard 
outlet  for  line  cord  testing.  Selec- 
tor switch  connects  to  pins  of  sock- 
ets. Model  160.  Clarostat  Mfg.  Co., 
287  N.  6th  St.,  Brooklyn,  N.  Y.— 
Radio  Today. 


Ball-type  mike 

*  Electro-dynamic  microphone 
housed  in  ball-shaped  satin-black 
metal  case.  Adjustable  bracket 
makes  the  model  directional  or  non- 
directional.  Frequency  response 
from  25  to  10,000  cycles.  Output 
level — 52  DB.  High  and  low  impe- 
dances. Model  MK35— list  $34.50. 
Tilton  Electric  Corp.,  15  E.  26th  St., 
New  York,  N.  Y. — Radio  Today. 


Hermetically  sealed  resistors 

•k  Precision  type  resistors  in 
hermetically-sealed  glass  cylinder. 
Glass  to  metal  seal  provides  perma- 
nent seal.  Non-inductive  pie-wound 
resistance  element  on  porcelain 
spool.  Ohmmages  from  .1  to  2,000,- 
000.  1  per  cent  tolerance  or  closer 
— 1  watt  rating.  Ohmite  Mfg.  Co., 
4835  Flournoy  St.,  Chicago,  111.— 
Radio  Today. 


Single-button  mike 

*  Smallest  enclosed  single-button 
microphone.  "Watch  model"  is  de- 
signed for  detectaphones,  inter- 
communicating systems,  etc.  Unit 
can  be  easily  concealed — also  works 
as  a  lapel  microphone.  Model  W — 
list  $3.  Universal  Microphone  Co., 
Inglewood,  Calif. — Radio  Today. 


Multiple  antenna  system 

*  All-wave  antenna  system  for 
use  with  1  to  25  receivers.  Designed 
for  apartment  houses  and  large  pri- 
vate homes.  Provides  increased  sig- 
nal pick-up  and  eliminates  maze  of 
wires.  Basic  kit  model  645 — list 
$5.50.  Model  648  Set  couplers  list 
for  $2.  Consolidated  Wire  &  Assoc. 
Corp.,  Peoria  St.,  Chicago,  111. — 
Radio  Today. 


Insulated  grid  clip 

*  Universal  grid  clip  for  all  sizes 
of  grid  caps.  Jaws  specially  con- 
structed to  fit  cap.  Rubber  insulator 
over  clip  which  is  supplied  with  10- 
inch  lead  and  standard  phone  tip. 
Type  106 — list  20  cents.  Mueller 
Electric  Co.,  1583  E.  31st  St.,  Cleve- 
land, Ohio. — Radio  Today. 


Add-A-Bin 

*  Neat,  compact,  low-cost  means 
for  storing  small  radio  parts.  Bins 
are  sold  separately  and  assembled 
by  the  user  to  fit  individual  needs. 
Bin  housing  may  be  screwed  to 
wall  or  panel.  Bins  close  auto- 
matically after  use.  If  bin  is  lifted 
slightly  when  open,  it  will  lock 
open.  May  also  be  removed  from 
housing.  Welded  steel  construction. 
Noggle  Products  Co.,  Ann  Arbor, 
Mich. — Radio  Today. 


24 


Radio  Today 


^»pLe^ 


1 


ONLY 

"15.0f 


■del  866  hn»  3"  *C|.  Triplet!  Improved  rectifier  type  instrument. 
•IX  \  ..iriiKe  Scales  remit  0-10-50-250-500-1000  at  1000  ohms  per 
volt.  DC  Mllllamnere  Scale  rends  i  0-1-10-50-2RO.  ohms  Scales  readi 
Low  S4-300|  High  2.%O.000.  KeMlMtanee  rnn^e  can  be  Increased  bj  add- 
InK  external  batteries.  Slse  :t  1/16"  I  B%"  x  B%".  Black  Molded  Case 
and  Panel.  Newly  Improved  Low  Loss  Selector  Switch.  Complete 
with    Alligator  Clips,   Battery  and  Test   Leads.      Dealer   Price,   $15.00 

EXCLUSIVE  NEW  TRIPLETT  LOW  LOSS  SWITCH 

Incorporated    in    Model    066.     Uses    two    silvered    contacts    instead    of 
one.     Insuring    lower    contact     resistance.      On    actual     breakdown     test, 
on    rind    oft    operation    exceeded    10    million    times    without    failure. 
\lll<\<    M\l.    BLACK    LEATHER    CARRYING    CASE,    MODEL 
809,    is    si  l»PLIED    EXTRA.     DEALER    PRICE  £3.67 

In  designing  testers  of  ultra  compact  size,  many  problems  occur  that  do  not 
have  to  be  considered  where  more  space  is  available.  Triplett's  Model  666  bas 
stood   the  test   of  time  and   it   is  the  biggest   seller  of   its  kind   in   this   market. 


P0CKE1 

VOLT-OHM- 

MILLIAMMETER 

A  complete  instrument  for  al 
AC-DC  voltage,  current  and  re 
sistance  analyses. 


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Eleetr 


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THE  TRIPLETT  ELECTRICAL  INSTRUMENT  CO. 
Bluffton,  Ohio 


pi-  ,8e"6e  a6*'"'16" 


italoi 


Addre 


City 


State 


November,  1938 


MORE  NEW  THINGS 


35-watt  amplifier 

*  5-stage  12-tube  amplifier  with 
35-watt  output.  Mike  gain  of  130 
DB  gain  with  2  meg  input  imped- 
ance. Mixers  handle  up  to  3  mikes 
and  phonograph.  Multi-stage  de- 
generation. Model  4L35.  Webster 
Co.,  5622  Bloomingdale  Ave.,  Chi- 
cago, 111. — Radio  Today. 


Isolation  transformers 

*  Adjustable  voltage  and  isola- 
tion transformers  with  electro-static 
shield  between  windings.  Eliminates 
line  noises  and  keeps  radio  noises 
off  the  power  line.  Tapped  at  105, 
115,  125  volts.  Units  available  for 
100,  250,  500  volt-amperes.  Thordar- 
son  Electric  Mfg.  Co.,  500  W.  Huron 
St.,  Chicago,  111. — Radio  Today. 


Unified  sound  system 

+  24-36  watt  sound  system  with 
beam-power  amplifier.  Uses  two  12- 
inch  speakers  with  wall  baffles. 
Choice  of  microphones  with  cable. 
Floor  stand  and  all  accessories. 
C22R  amplifier   only— list  $42.  Cla- 


rion model  C-440.  Complete  system 
— $129.90.  Transformer  Corp.  of 
America,  69  Wooster  St.,  New  York, 
N.  Y. — Radio  Today. 

Rider  Manual.  Vol.  IX 

*  1650-page  radio  service  man- 
ual with  circuits  and  servicing  data 
on  the  1938-39  receivers.  Manual 
contains  a  64-page  section,  "How  It 
Works"  in'-  which  the  mechanical 
features  are  clearly  covered.  Re- 
vised index,  140  pages  in  itself,  lists 
all  receivers  in  the  9  manuals.  Vol- 
ume IX — net  $10.  John  P.  Rider, 
Publisher,  New  York,  N.  Y. — Radio 
Today. 


Transmitting  condensers 

*  Oil-filled  and  oil-impregnated 
capacitors  with  universal  mounting 
bracket.  Rectangular-shaped  can  re- 
quires minimum  space.  Labelled 
with  maximum  DC  voltage  and 
surge  voltage.  Oil  has  flash-point  of 
500°  F.  Type  CR  units.  Sprague 
Products  Co.,  N.  Adams,  Mass. — 
Radio  Today. 


Radio-dial  tube  tester 

*  Tube  tester  having  but  2  con- 
trols to  set  when  checking  a  tube. 
Turn  dial  until  tube  type  appears 
and  switching  of  the  circuits  is  au- 
tomatically accomplished.  Turn  sec- 
ond dial  to  number  indicated  under 
tube  type.  Insert  tube  in  socket 
and  push  test  button  for  meter 
reading.  Dial  mechanism  can  be 
removed  in  90  seconds  for  modern- 
ization— no  wires  to  disconnect. 
Model  9-99.  Stark  Instruments,  418 
S.  Wells  St.,  Chicago,  111.— Radio 
Today. 

Single-ended   tubes 

*  Line  of  amplifier  tubes  in 
which  the  top  lead  or  cap  has  been 
transferred  to  the  base.  Through 
special  inter-lead  shielding  and  bas- 
ing, the  interlectrode  capacitance  is 
not  increased  over  the  older  type. 
Tubes  identified  by  the  letter  "S." 
Following  types  available:  6sJ7, 
6sQ7,  6sK7,  6sF5G.  Raytheon  Pro- 
duction Corp.,  420  Lexington  Ave., 
New  York,  N.  Y. — Radio  Today. 


Million  sound  systems 

•  Line  of  5,  10,  17,  35-watt 
sound  systems  and  amplifiers. 
Prices  for  complete  twin-speaker 
systems  in  carrying  cases  start  at 
$49.95  list.  17-watt  amplifier  illus- 
trated. Million  Radio  &  Television 
Labs.,  685  W.  Ohio  St.,  Chicago, 
111. — Radio  Today. 

Arcturus  tubes 

•Ar  New  tubes  added  to  the  re- 
placement line  are:  6J8G,  6K8G, 
6P5G,  6F5GT.  New  plug-in  resis- 
tors (ballasts)  are:  BK42BG, 
EK42CG,  BK49BG,  BL49DG,  BM42- 
BG  BM55BG,  L36DG,  L36DJG, 
L49BJG,  K49AG.  Arcturus  Radio 
Tube  Co.,  Frelinghuysen  Ave.,  New- 
ark, N.  J. — Radio  Today. 


Dynamic  microphone 

•*■  Moving-coil  type  of  micro- 
phone with  output  of  — 59  DB.  Fre- 
quency response  flat  within  4  DB 
from  60  to  9,000  cycles.  Directional 
and  non-directional  characteristics 
obtained  by  adjusting  mike  unit  on 
stand.  Model  99— list  $32.50  with 
stand.  Turner  Co.,  Cedar  Rapids, 
Iowa. — Radio  Today. 

Electrolytic  condenser 

*  Dry-type  electrolytic  capacitor 
in  one-inch  diameter  can  with  sim- 
ple ring  mounting.  Available  in 
extremely  high  capacity  values. 
Single  and  multiple  section  types. 
Hermetically  sealed.  Known  as  type 
B.  Aerovox  Corp.,  70  Washington 
St.,  Brooklyn,  N.  Y.— Radio  Today. 

Television  tube 

■*•  14-ineh  television  tube  manu 
factured  and  priced  on  mass-produe 
tion  basis  for  all  television  receivers 
Full  8  x  10  inch  screen  image  pro 
vided  by  this  tube.  Tested  for  de 
flection  sensitivity,  image  brilliancy 
positioning,  and  other  characterist 
ics.  Allen  B.  DuMont  Labs.,  Inc 
Passaic,  N.  J. — Radio  Today. 


26 


Radio  Today 


J 


S$  t/WMxmwrri  t^W 


SYLVANIA 


In  this  magazine  ...  all  during  1938 
.  .  .  we  have  shown  you  examples  of 
the  extreme  care  and  precision-work- 
manship that  go  into  each  Sylvania 
radio  tube.  And  we've  explained 
some  of  the  tests  and  rules  that  help 
keep  the  famous  "Sylvania  quality" 
uniformly  high. 

Naturally,  we  have  been  able  to 
present  just  a  small  portion  of  the 
entire  Sylvania  quality  story.  But 
we  do  hope  one  important  fact 
has  been  made  clear:  The  name 
"SYLVANIA"  stands  for  quality 
above  all  else  .  .  .  First,  Last  and 
Always! 

Remember  this  fact — let  it  be  your 
guide  when  buying. 


Hygrade  Sylvania  Corp.,  Emporium,  Pa. 
AJso    makers   of  Hygrade    Lamp   Bulbs. 


November,  1938 


27 


KILLING   JOBBER   SALES 

Granting  extra  discounts  to  large  jobbing  outlets 
may  cost  more  business  than  manufacturers  realize 


Were  I  to  sign  my  name  to  this  very 
frank  expression  of  opinion,  I'd  spend 
the  next  few  weeks  arguing  with  the 
salesmen  and  even  the  sales  managers 
of  a  couple  of  dozen  parts  manufac- 
turers. So  it's  simpler  and  certainly 
more  effective  for  me,  as  a  disgusted 
jobber,  to  hide  behind  a  pen  name  in 
my   corn-stepping  pronouncements. 

Frankly,  very  frankly,  I'm  dis- 
gusted with  the  radio  parts  jobbing 
business.  I'm  seriously  considering 
going  out  of  business.  Of  course  it's 
always  been  a  chiselling  business  at 
best.  But  during  the  past  year  or  two 
the  chiselling  tactics  have  extended 
even  to  some  of  the  larger  and  bet- 
ter kind  of  manufacturers,  which  is 
the  final  straw  so  far  as  I'm  con- 
cerned. 

However,  before  throwing  over- 
board the  efforts  of  a  decade  in  the 
radio  parts  jobbing  business,  I'm  in 
hopes  that  the  following  remarks  and 
suggestions  may  possibly  bring  some 
of  the  parts  manufacturers  to  their 
senses. 


Extra-discount  evil 

My  squawk,  and  likewise  that  of 
hundreds  of  other  small  jobbers,  is 
that  certain  parts  manufacturers  are 
playing  up  to  large  wholesale  outlets 
to  our  detriment.  In  other  words,  the 
large  wholesalers  are  often  granted  ex- 
tra discounts  which  we  smaller  fel- 
lows don't  get.  Now  if  those  extra 
discounts  were  in  consideration  of  the 
handsome  catalogs  and  elaborate  show- 
rooms and  stupendous  stocks  carried 
by  the  large  wholesalers,  we  might 
pass  up  the  matter.  After  all,  even 
though  it  were  displaying  marked  par- 
tiality, we  might  simply  assume  that 
it  wasn't  any  of  our  business.  But 
that's  not  the  real  trouble. 

Some  of  these  large  wholesalers 
have  seen  fit  to  pass'  the  discounts 
along  to  our  own  servicemen  and  re- 
tailers. And  that's  what  really  hurts. 
That  extra  ten  per  cent,  if  passed 
along  to  the  buyer  in  the  trade,  soon 
establishes  a  precedent.  When  we 
smaller  jobbers  call  around  and  try 
to  sell  on  our  usual  "40-off"  basis, 
we're  soon  told  we're  out  of  line.  Yet 
we  need  our  full  margin  between  the 
40-off  and  our  own  jobber's  discount, 
to  make  both  ends  meet  these  days. 
So  we  can't  meet  that  extra  discount 
which  the  favored  wholesaler  has  won 
from  the  manufacturer  and  is  passing 
on  to  serviceman  or  retailer. 

Now  it's  surprising  how  those  big 
fellows   reach  out.     My  own   territory 


is  adjacent  to  a  large  city.  I  cover 
the  outlying  sections  both  by  trucks 
and  by  a  store.  My  trade  is  both  with 
servicemen  and  radio  stores.  Until  a 
couple  of  years  ago,  I  enjoyed  an  ex- 
cellent parts  trade.  But  during  the 
last  two  years,  some  of  my  manufac- 
turers have  seen  fit  to  play  ball  with 
the  big  houses,  and  my  trade  has 
dropped  off  to  a  marked  extent  because 
I  refused  to  meet  the  big  fellow's  extra 
discount. 

Not  one  in  a  dozen  I  deal  with  ever 
gets  down  to  the  big  city.  I  dare  say 
that  only  a  handful  of  my  customers 
have  actually  been  contacted  by  the 
big  wholesalers  operating  in  the  city. 
Yet    that    extra     discount     news    has 


BIG-CITY  WIND  CHARGER 


O.  J.  Herrelson,  Chicago,  was  so  sold 
on  "power  from  the  wind"  he  con- 
nected with  Wincharger  Corp.  and  this 
85  ft,  1,000  watt  outfit  was  the  result. 


spread    far    and    wide.      I    run   across 
this  demand  almost  daily. 

Meanwhile,  it's  interesting  to  note 
how  we  small  fellows  are  expected  to 
carry  such  a  varied  stock.  Take  exact- 
duplicate  parts,  for  instance.  A  job- 
ber can  sink  a  pile  of  money  into  just 
one  each  of  a  very  wide  assortment  of 
parts.  While  we're  carrying  such  stocks 
as  an  accommodation  to  our  service 
trade,  the  big  wholesalers  are  clean- 
ing up  on  standard  items  by  granting 
extra  discounts.  It  simply  doesn't 
seem  right. 


Special  deals 

Then  there's  another  bit  of  foolish- 
ness we  are  facing.  Some  manufac- 
turers have  seen  fit  to  make  their 
products  available  on  special  deals. 
The  serviceman  can  frequently  buy  a 
test  instrument  or  a  service  manual 
at  a  knocked-down  price  or  in  con- 
junction with  the  purchase  of  a  cer- 
tain amount  of  goods,  while  we  can- 
not match  such  costs  within  our  dis- 
counts. Just  as  soon  as  I  find  one  of 
my  lines  being  featured  on  such  a 
"deal,"  I'm  immediately  through  with 
it. 

No,  it  isn't  right.  The  manufacturer 
wants  to  get  that  volume  business  in 
big  chunks  through  the  big  whole- 
salers. Meanwhile,  he  assumes  that  we 
little  jobbers,  carrying  on  in  the  wide 
open  spaces,  are  going  to  keep  going 
with  a  smile.  But  unfortunately,  the 
big  wholesalers  and  the  deals  make 
news  in  this  trade,  and  once  a  lower 
price  or  longer  discount  is  established, 
the  fact  spreads  like  wild-fire.  We're 
expected  to  meet  the  same  discounts 
and  prices. 


Different  brand  names 

If  we  only  had  other  brand  names 
to  compete  against,  we  smaller  fel- 
lows could  still  make  out  a  case.  But 
when  it's  the  exact  same  brand  names, 
type  numbers  and  so  on,  we  cannot 
argue  against  lower  prices  or  longer 
discounts.     We're   simply   licked. 

There's  room  for  all  of  us  in  the 
jobbing  field.  The  trade  needs  the 
smaller  jobber  with  his  close  contact 
and  handy  stock,  just  as  much  as  the 
big  wholesaler  with  his  large  stock 
and  explicit  catalog  and  prompt  de- 
liveries even  at  a  distance.  But  un- 
less the  discriminating  discounts  of 
today  are  promptly  discontinued,  there 
are  going  to  be  a  lot  less  small  jobbers 
around  to  take  care  of  the  outlying 
trade,  I  assure  you. 


28 


Radio  Today 


BUILDS  A  FUTURE 


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tL 


RADIO  SERVICE  DEALERS  OF  AMERICA 

The  modern  radio  tube  is  the  heart  of  all  electronic  apparatus.  Every  present  form 
of  radio  receiver  and  transmitter,  sound  re-enforcement  and  motion  picture  sound 
equipment,  as  well  as  a  great  many  other  electrical  mechanisms,  depend  entirely 
upon  the  radio  tube  for  proper  operation. 

The  development  and  growth  of  the  radio  art  and  industry  has,  in  a  large  mea- 
sure, been  dependent  upon  the  ability  of  radio  engineers  to  design  radio  tubes 
that  will  properly  perform  very  definite  functions. 

Since  the  beginning  of  radio,  RCA  has  spent  millions  of  dollars  in  radio  tube 
research,  and  in  addition  has  concentrated  its  tremendous  facilities  upon  the  prob- 
lem of  developing  and  manufacturing  radio  tubes  which  must  meet  exacting  speci- 
fications. As  a  result  of  this  continued  activity  RCA  Radio  Tubes  have  rightfully 
earned  a  reputation  for  reliability  and  uniformity  of  quality  which  has  long 
been  the  envy  of  the  radio  industry. 

At  some  time  in  the  future,  a  new  electronic  marvel  may  be  serving  the  public — 
TELEVISION.  Here,  too,  RCA  has  played  an  historic  role  by  pioneering  a  potentially 
great  art  and  industry.  It  was  the  knowledge  of  these  fundamental  electronic  prin- 
ciples of  the  radio  tube  which  has  brought  Television  to  its  present  stage  of  prac- 
tical  development. 

As  more  radio  and  electronic  devices  come  out  of  the  laboratory  and  into  general 
use, more  opportunitiesare  pro- 
vided for  the  aggressive  ser- 
vice dealer  to  increase  his  own 
activity.  All  of  these  electronic 
mechanisms  must  be    properly 


serviced  as  well  as  sold  and 
thus  we  find  that  the  radio 
service  dealer  becomes  a  more 
important  figure  in  the  radio 
industry. 


*y 


Photograph  shows  an  RCA  Television 
Engineer  preparing  a  kinescope  glass 
envelope  for  spraying  with  fluorescent 
material. 


*A 


1^  Al 


*A '  ^jA. 


FIRST  IN  METAL 

FOREMOST  IN  GLASS 

FINEST  IN  PERFORMANCE 


RCA   MANUFACTURING   CO.,  INC.,  Camden,  N.  J.   • 


RCA  presents  the  "MAGIC  KEY"  every  Sunday, 
2  to  3  P.  M.,  E.  S.  T.,  on  the  NBC  Blue  Network. 


*  MORE  THAN  325  MILLION  RCA  RADIO  Tt!S 


THE  QUALITY  OF 


IS  NEVER  QUESTIONED 

"Quality^9  says  Webster's  Dictionary  9  "is  the 
excellence  of  character.  " 

SINCE  the  beginning  of  radio,  RCA  has  spent  millions  of  dollars 
on  engineering  research  in  the  fields  of  the  electronic  art  to 
create  and  preserve  "the  excellence  of  character"  that  has  been 
built  into  the  hundreds  of  products  that  bear  the  RCA  trade-mark. 

And  so  it  is  with  RCA  Radio  Tubes. 

The  quality  of  RCA  Radio  Tubes  has  been  accepted  as  stand- 
ard the  world  over— 

.  .  .  that's  why  more  than  325  million  RCA  Radio  Tubes  have  been 

purchased  by  radio  owners. 
.  .  .  that's    why    more   than    thirty    radio    manufacturers   use    RCA 

Radio  Tubes  as  original  equipment. 

.  .  .  that's  why  the  majority  of  broadcasting  stations  in  the  United 
States,as  well  as  leading  Foreign  Stations, use  RCA  Radio  Tubes. 

.  .  .  that's  why  over  5,000  motion  picture  theatres  use  RCA  Radio 
Tubes  in  their  RCA  Photophone  Sound  Equipment. 

.  .  .  that's    why    RCA    Radio  Tubes    are    standard    equipment    in 
Police,  Aviation,  Marine  and  other  communication  apparatus. 

In  order  to  capitalize  upon  the  tremendous  public  acceptance  for 
RCA  Radio  Tubes,  radio  dealers  and  service  men  should  keep  an 
adequate  stock  on  hand  at  all  times.  See  your  local  RCA  Radio 
Tube  Distributor. 


HAVE  BEEN  PURCHASED  BY  RADIO  OWNERS 


THE  QUALITY  OF 


<*>*£» 


7WR.cuOo7lc6e4 


RCA  presents  the  "MAGIC  KEY"  every  Sunday, 
2  to  3  P.  M.,  E.  S.  T.,  on  the  NBC  Blue  Network. 


, 


IS  NEVER  QUESTIONED 

**QuaUtyS*  says  Webster's  Dictionary,  **is  the 
excellence  of  character." 

^INCE  the  beginning  of  radio,  RCA  has  spent  millions  of  dollars 
O  on  engineering  research  in  the  fields  of  the  electronic  art  to 
create  and  preserve  "the  excellence  of  character"  that  has  been 
built  into  the  hundreds  of  products  that  bear  the  RCA  trade-mark. 
And  so  it  is  with  RCA  Radio  Tubes. 

The  quality  of  RCA  Radio  Tubes  has  been  accepted  as  stand- 
ard the  world  over— 

.  .  .  that's  why  more  than  325  million  RCA  Radio  Tubes  have  been 
purchased  by  radio  owners. 

.  .  .  that's  why  more  than  thirty  radio  manufacturers  use  RCA 
Radio  Tubes  as  original  equipment. 

.  .  .  that's  why  the  majority  of  broadcasting  stations  in  the  United 
States,as  well  as  leading  Foreign  Stations, use  RCA  Radio  Tubes. 

.  .  .  that's  why  over  5,000  motion  picture  theatres  use  RCA  Radio 
Tubes  in  their  RCA  Photophone  Sound  Equipment. 

.  .  .  that's  why  RCA  Radio  Tubes  are  standard  equipment  in 
Police,  Aviation,  Marine  and  other  communication  apparatus. 
In  order  to  capitalize  upon  the  tremendous  public  acceptance  for 
RCA  Radio  Tubes,  radio  dealers  and  service  men  should  keep  an 
adequate  stock  on  hand  at  all  times.  See  your  local  RCA  Radio 
Tube  Distributor. 


«ft*r 


•  MORE  THAN  325  MILLION  RCA  RADIO  TUIS  HAVE  BEEN  PURCHASED  BY  RADIO  OWNERS 


PURCHASE  OF  250 
RADIO  TORES* 


No-  1So  This  new  RCA  Tube  Tester  offers  service 

engineers,  radio  dealers,  everyone  sell- 
ing tubes,  a  highly  efficient  unit  that 
incorporates  the  experience  of  the 
world's  largest  radio  tube  manufacturer.  New  features  include 
testing  of  lWvolt  battery  tubes,  magic  eye  tubes  for  brilliance- 
and  cathode  ray  tubes.  It  is  priced  at  a  figure  everyone  can 
afford.  Stock  No.  156-A,  Counter  Type,  $37.95  net,  250  Radio 
Tubes.  Stock  No.  156,  Portable  Type  (with  cover),  275  Radio 
Tubes    ....    net,  $39.95 


RCA    3"   Cathode   Ray    Oscillograph,   No.    155, 
Net  $63.95—450  radio  tubes 

RCA    2"  Cathode    Oscillograph,  No.   151-2,    Net 
$49.95  —  350  radio  tubes 

RCA     1"  Cathode     Ray    Oscillograph,    No.    151, 

Net  $39.95  —  275  radio  tubes 
RCA    Pieio -Electric    Calibrator,    No.    9572,    Net 

$29.95  —  200  radio  tubes 
RCA  Universal  A-C  Bridge,  No.  9600,  Net  $49.65 

—  350  radio  tubes 

RCA  Frequency  Modulator,  No.  9558, Net  $27.50 

—  200  radio  tubes 

RCA    A-C  Test   Oscillator,   No.    153,  Net   $29.95 

—  200  radio  tubes 

RCA  Electronic  Sweep  Test   Oscillator,  No.   150, 

Net  $64.50  —  450  radio  tubes 
RCA  Beat  Frequency  Audio  Oscillator,  No.   154, 

Net  $49.95  —  350  radio  tubes 


NUFACTURING   CO.,  INC.,  Camden,  N. 


FIRST  IN  METAL 

FOREMOST  IN  GLASS 

FINEST  IN  PERFORMANCE 


of  rh«  Radio  Corporation  of  America 


1 


See   your    Distributor   for    complete    details 


HELP  ON  TUBE  SALES 

Promotion    picture    has    brisk   new   colors 


Important  sales-getters  are  being 
cooked  up  by  the  radio  tube  makers. 

Promotion  experts  are  doing  their 
level  best  to  aid  the  dealer  and  ser- 
viceman toward  better  business  in 
the  tube  replacement  field.  They  are 
working  fast  on  shop  appeal  and 
store  well-being,  in  a  new-style  battle 
for  more  volume. 

For  these  columns,  the  manufac- 
turers have  been  asked  to  name  the 
high  points  in  today's  tube  promo- 
tion. The  over-all  summary  of  the 
trade  makes  it  look  as  if  the  retailer 
can't  miss. 

(No  doubt,  the  central  blast  of  in- 
terest in  the  tube  business  today  is 
concerned  with  the  matter  of  prices 
— the  terrific  competition  in  dis- 
counts, deals,  special  offers,  etc. 
However,  the  fact  remains  that  the 
promotion  departments,  as  well  as 
the  price-cutting  divisions,  of  the 
tube  companies  are  news.) 

Displays  de  luxe 

Triad  Mfg.  Co.  reports  the  follow- 
ing action,  in  the  direction  of  more 
sales: 

"We  have  just  released  to  the 
trade  a  new  series  of  four  color  dis- 
play cards;  one  is  the  large  size 
which  can  be  used  for  window  or 
floor  display,  a  smaller  one  for 
counter  display  and  an  authorized 
dealer  card.  Locally  here  we  are 
just  instituting  a  broadcast  for  a 
period  of  one  half  hour  once  a  week 
with  a  daily  courtesy  announcement. 
This  latter  is  in  the  form  of  an  ex- 
periment and  is  intended  to  help  Mr. 
John  Public  to  demand  Triad  tubes 
in  the  New  England  territory  and  to 
help  the  dealer  move  the  tubes  from 
his  shelves. 

"Other  sales  promotional  ideas 
are  being  studied  although  the  above 
is  about  what  we  are  doing  at  the 
present  time." 


RADIO  BEDECKED  WITH  FLOWERS 


A  mirror-metal  cart  for  fresh  or  arti- 
ficial flowers,  which  contains  a  5-tube 
superhet  AC-DC  radio.  From  Emron 
Radio  Division  of  Creative  Products 
Co.   1140  Broadway,  New  York  City. 


Snappy  tie-ups 

Hygrade  Sylvania  Corp.  has  a  se- 
ries of  announcements: 

"We  have  just  distributed  a  Fall 
window  display  with  a  football  theme 
which  dramatizes  'listening  in'  on 
the  big  games.  Then,  a  more  direct 
tie-up  to  help  progressive  dealers  and 
servicemen  is  our  football  score 
booklet  which  we  made  available  to 
them  at  reasonable  cost.  Each  dealer 
who  took  the  item  received  window 
streamers  which  directed  passersby 
to  come  in  and  get  one.  Copy  in  the 
score  book  stressed  the  importance 
of  having  radios  regularly  inspected 
and  new  tubes  installed  at  least  once 
a  year. 

"We  are  now  announcing  a  new 
outdoor  metal  flange  sign  which  has 
two  important  features  for  the  ser- 
viceman. The  words,  'Complete 
Radio  Service,'  stand  out  strongly 
on  the  face  of  the  sign  and  a  plate 
for  the  man's  name,  personalizing 
the  sign,  is  hung  from  the  bottom 
edge  with  two  'S'  hooks. 

"For  the  Christmas  shopping  sea- 
son we  will  have  a  holiday  window 
poster  reminding  Mr.  and  Mrs.  Con- 
sumer to  give  their  radio  a  present 
of  a  new  set  of  tubes  and  to  have 
their  radios  tuned  up  to  receive  all 
the  happy  holiday  programs." 

Progressive  promotion 

Here  is  the  point-of-sale  news  from 
Ken-Rad: 

"We  have  been  distributing  to  our 
jobbers  and  their  dealers  several  very 
pttractive  and  effective  point-of-sale 
advertising  items. 

"The  progressive  dealer  will  use 
the  Ken-Rad  tube  displays  to  very 
good  advantage.  Dealers  located  in 
residential  communities  realize  that 
replacement  tubes  and  radio  service 
work  sales  can  be  had  by  using  effec- 
tive window  display  pieces  that  are 
designed  to  suggest  to  the  consumer 
that  a  radio  set  requires  new  tubes 
in  course  of  time. 

"Available  to  Ken-Rad  tube  deal- 
ers is  a  series  of  four  display  cards, 
a  seven  piece  window  trim  set,  win- 
dow streamers  decalcomania  and  en- 
velope stuffers  that  can  be  used  for 
mailing." 

Business-builders 

General  Electric  calls  attention  to 
these  matters: 

"Radio  dealers  and  service  men 
have  expressed  unusual  interest  in 
the  new  line  of  G-E  radio  test  equip- 
ment recently  released.  The  com- 
pactness and  efficiency  of  the  tube 
checker,  signal  generator  and  oscil- 
lograph particularly  have  caused 
much  favorable  comment.  In  addi- 
tion to  these  three  items  there  is 
also  available  a  multimeter  and  com- 
bination tube  and  set  checker. 
(Continued  on  page  50) 


NEW  ORLEANS 

PITTSBURGH 

BOSTON 

PUSH-BUTTON 
TUNING  TROUBLES 

Tloiu  Ouercome! 


WITH  LATEST 

ALADDIN 
kPUSH-BUTT0N] 


COMPONENTS! 


These  perfected  An- 
tenna and  Oscillator 
Permeability  -  Tuned 
Polyiron  Inductors  are  specifically  designed 
to  provide  reception  of  MORE  stations  where 
they  are  crowded  in  small  areas  in  any  por- 
tion of  the  broadcast  band.  Note  how  bands 
OVERLAP  on  chart.  Check  this  against 
YOUR  requirements.  It  may  solve  your  prob- 
lems and  eliminate  a  multiplicity  of  specifica- 
tions to  meet  the  demands  of  various  locations. 


LOOK    AT   THIS    CHART! 


J,  I    I    .[    j^    I     I    II 


SEND  FOR  COMPLETE  DETAILS! 

These  Aladdin  Polyiron  Inductors  are  specially 
good  for  Pittsburgh,  New  Orleans,  Boston  and 
other  troublesome  locations.  Inexpensive  in  de- 
sign, they  are  engineered  to  meet  today's  low 
cost  market  requirements.  Single  adjustment. 
No  variable  capacities.  Easily  adaptable  to 
any  of  the  standard  approved  push-button 
switches.     Write    for    project    data,    NNB1855. 

ALADDIN   RADIO   INDUSTRIES,  INC. 

466t   W.  SUPERIOR  ST.  CHICAGO,   ILL. 

Licensee    of   Johnson   Laboratories,    Inc. 

These  devices  manufactured  under  one  or  more  of  the  following 
U.  S.  Letters  Patent:  1,887,580  1,997,4$}  2,057,88^  2,082,$!)$ 

2,111, }7}    1,940,228    2,002, $00    2,0}S,2Sl    2,094,189    2,111,490 

1,978,568  2,005,205  2,0 j  1, ei2  2,095,420  2,113,605  1,978, $$9 

2,018,626    2,0$9,}9J    2,104,792    2,122,874    1,978,600    2,028,$}4 

2,082,587  2,106,226  2,131,976  1,982,689  2,032,580  2,082,589 
2,106,229  It9$2>69°  2i°}Si4}9  2,°8 2,590  2,106,25 j.  Other 
patents  pending. 

V»— fShiddm} 


November,  1938 


33 


MATCHING  BIAS  TO  CIRCUIT 


Dynamic  Testing — Part  X 


Proper  biasing  of  an  amplifier  tube 
is  essential  for  distortion-free  opera- 
tion of  tbe  amplifier,  yet  it  often  bap- 
pens  tbat  tbe  radio  serviceman  does  not 
know  or  cannot  find  out  wbat  the  prop- 
er bias  is. 

Static  measurements  will  tell  what 
the  bias  voltage  is,  if  suitable  means 
are  at  band  for  measuring  the  voltage. 
Sometimes,  due  to  high  resistance  cir- 
cuits, the  bias  cannot  be  measured 
without  a  vacuum  tube  voltmeter.  But 
even  if  the  voltage  can  be  measured, 
unless  the  serviceman  knows  what  it 
should  be,  it  is  not  an  infallible 
method  of  determining  whether  or  not 
it  is  correct.  Tube  manuals  and  char- 
acteristics give  many  of  the  typical 
operating  conditions,  and  it  is  an  easy 
matter  to  interpolate.  But  if  the  man- 
ufacturer has  used  a  different  value  of 
load  resistance  than  that  recommended 
or  used  other  special  operating  condi- 
tions, the  bias  may  be  different  from 
the  recommended  value. 

For  this  reason  it  is  desirable  to 
have  a  dynamic  test  for  determining 
whether  or  not  the  bias  is  best  suited 
to  tbe  existing  operating  conditions. 

Tube  as  own  V.T.  meter 

First  of  all,  the  tube  under  considera- 
tion can  be  employed  as  its  own  vac- 
uum tube  voltmeter  for  a  check  of  the 
static  conditions.  The  value  of  plate 
current  that  the  tube  draws  in  the 
radio  set  socket  is  a  measure  of  the 
plate  voltage  and  bias  voltage.  So  if 
the  plate  voltage  is  okay  and  the  tube 
is  good,  one  expects  a  certain  amount 
of  plate  current,  for  a  given  value  of 
grid  bias.  Fixing  all  other  variables, 
the  plate  current  of  the  tube  becomes 
an  indicator  of  the  grid  bias,  which 
may  be  calibrated  from  a  knowledge 
of  the  tube  characteristics.  For  a  more 
complete  discussion,  the  reader  is  re- 
ferred to  Each  Tube  in  Set  a  Vacuum 
Tube  Voltmeter  which  appeared  on 
pages  55  and  56  of  the  July,  1937,  issue 
of  Radio  Today. 

For  a  dynamic  test  of  the  bias,  an 
audio  signal  generator  with  an  output 


from  zero  to  that  necessary  for  driving 
the  stage  to  its  full  output  is  used.  The 
generator  may  be  coupled  to  the  grid 
circuit  through  a  blocking  condenser  if 
necessary.  Frequency  of  oscillator 
should  be  about  400  to  1000  cycles. 

As  pointed  out  in  the  discussion  on 
load  impedances  in  the  September  and 
October  issues,  the  plate  current  of  a 
power  output  tube  will  increase  as  the 
grid  signal  on  the  tube  is  increased. 
As  shown  in  Fig.  1,  the  plate  current 
for  a  type  45  increases  from  32.2  to  36.8 
or  about  14  per  cent  for  a  peak  grid  sig- 
nal equal  to  the  bias.  For  a  type  2A3 
Fig.  2  shows  an  increase  of  about  10 
per  cent. 

Non-linear  characteristics 

With  pentodes  the  increase  is  some- 
times followed  by  a  dropping  off.  The 
type  47  increases  about  5  per  cent  for 
about  half  its  maximum  output  and  de- 
creases slightly  for  full  output  as  illus- 
trated in  Fig.  3.  This  is  because  of 
the  extreme  non-linearity  of  the  dynam- 
ic tube  characteristic.  (See  Fig.  3  on 
page  51  of  the  October  Radio  Today.) 
The  type  42  tube  (Fig.  4)  shows  a 
gradual  increase  which  reaches  about 
8  per  cent  for  full  output  (peak  grid 
signal  equal  to  bias). 

If  a  power  output  amplifier  does  not 
exhibit  a  rise  in  plate  current  of  about 
5  to  10  per  cent  (some  tubes  15  per 
cent),  it  is  a  sign  that  the  bias  on  the 
stage  is  too  low.  Conversely,  if  the  in- 
crease in  plate  current  is  greater  than 
the  figures  given,  the  bias  is  too  great. 
(Exceptions  to  this  are  the  Class  AB, 
Class  A  prime,  and  the  Class  B  ampli- 
fiers). 

This  dynamic  test  is  simple  to  make, 
and  is  most  readily  obtained  using  a 
socket-type  analyzer  having  a  cable  to 
transfer  the  circuits  from  the  set  to  the 
test  unit.  At  the  same  time,  the  other 
measurements  can  be  easily  made  on 
the  circuit,  since  all  the  tube  terminals 
are  available  for  handy  testing. 

With  such  a  circuit  tester  it  is  an 
easy  matter  to  insert  a  milliammeter 
in    the   plate   circuit.     If   the   cathode 


current  is  measured,  the  screen  current, 
if  any,  must  be  taken  into  account — 
for  this  reason  it  is  preferable  to  stick 
to  the  plate  circuit  of  pentodes. 

The  dynamic  test  described  is  based 
on  the  assumption  that  the  plate  load 
impedance  has  been  checked  as  out- 
lined in  the  September  and  October 
issues  of  Radio  Today. 

If  cathode  resistor  bias  is  employed, 
the  bias  can  be  easily  increased  by  in- 
serting additional  resistance  in  series 
with  the  cathode  lead — here  again  the 
socket-type  set  analyzer  is  very  handy. 
The  additional  resistance  is  so  adjusted 
that  the  plate  current  increases  5  to 
10  per  cent  at  full  power  output.  If  an 
oscilloscope  is  available,  the  bias  can 
be  adjusted  for  maximum  power  out- 
put with  minimum  distortion.  Or  the 
ear  can  be  employed  for  detecting  a 
reduction  in  distortion. 

The  bias  can  be  decreased  by  shunt- 
ing the  cathode  resistor  with  a  variable 
resistance  and  adjusting  it  for  proper 
circuit  operation.  The  proper  value  of 
the  resistance  for  the  bias  resistor  is 
the  combination  of  the  resistor  in  the 
set  and  the  external  one. 

With  fixed  bias  it  is  usually  more  dif- 
ficult to  provide  for  changes  in  the  bias 
voltage.  A  battery  with  a  potenti- 
ometer across  it  can  be  used  in  series 
with  the  grid  circuit  for  adding  or 
subtracting  from  the  bias  voltage,  as 
the  need  may  be. 

Voltage  amplifier  tubes 

The  dynamic  characteristics  of  volt- 
age amplifier  tubes  are  quite  different 
from  those  of  the  power  amplifier  tubes 
since  the  value  of  load  resistance  does 
not  have  to  be  adjusted  for  maximum 
power  output.  Instead  the  load  is  gen- 
erally chosen  for  the  highest  practical 
amplification.  Tbe  high  values  of  load 
resistance  employed  have  a  tendency  to 
smooth  out  the  dynamic  characteristic 
— it  is  a  more  linear  curve.  As  a  re- 
sult, the  plate  current  of  voltage  am- 
plifier is  much  more  constant  than  that 
of  power  amplifier  tubes.  Practically 
speaking,  the  plate  current  will  be  con- 
stant for  Class  A  voltage  amplifiers,  if 
the  plate  voltage  is  constant.  If  the 
power  supply  has  poor  regulation,  it  is 
likely  that  the  increase  in  plate  cur- 
rent of  the  power  output  tube  may 
cause  the  power  supply  voltage  to  de- 
crease slightly.  Naturally,  the  change 
in  plate  voltage  would  have  a  corre- 
sponding effect  upon  the  plate  current 
of  the  voltage  amplifier. 


Figs.  1  to  4  below  show  that  plate  current  of  any  power  amplifier  stage  should  increase 
with   grid    excitation.    Voltages   and   load   conditions    are    recommended    values. 


TYPE  2A3 
GRID  BIAS- -45 


20     30    40     50 
SR1D  SIGNAL  VOLTS 


I 1 I I  io 

.0      20     30     40    50 
PEAK  GRID  SIGNAL  VOLTS 


R^TTwVaEvE- 


"UNIVERSAL-ADJUSTABLE" 
Antenna-R.  F.-Oscillator  Coils 

IT  IS  no  longer  necessary  to  order  hard-to-get  exact 
duplicates  when  an  Antenna,  R.  F.  or  Oscillator  coil 
needs  replacing.  These  new  adjustable-inductance  Fer- 
rocart  (Iron  Core)  coils  will  replace  the  Broadcast  Band 
coils  in  practically  any  receiver!  The  Oscillator  coil  is 
also  designed  to  provide  complete  adjustment  for  re- 
ceivers having  intermediate  frequencies  from  175  to 
520  kc,  and  may  be  used  in  either  cut-plate  tuning 
condenser  or  padding  condenser  circuits.        ^^-^c^8-' 

PS©*- 


U 


Band  Expanding  I.  F.  Transformers  . .  . 

These  Ferrocart  (Iron  Core)  Band  Expanding  I.  F.  Transformers  meet  all  require- 
ments for  variable  selectivity — razor-sharp,  medium  width  or  broad  band  for  high 
^^^-—-~\     fidelity  reception.  Band  width  is  electrically  variable  by  means  of  a  switch. 


Double-Tuned  I.  F.  Transformers 

This  is  the  ideal  replacement  transformer  for  Servicemen  and  Experimenters 
who  demand  the  utmost  in  I.  F.  transformer  performance  at  low  cost.  Avail- 
able factory-peaked  at  175,  262,  370,  456,  1500  or  3000  kc.  ^--—-^Tc^5^ 


T^Tco^ 


Ferrocart  Antenna  &  R.  F.  Coils 

These  (Iron  Core)  coils  are  designed  to  cover  the  broadcast  band  (540  to 
1600  kc)  with  a  365  mmf  condenser.  Will  work  with  any  of  the  standard  types 
of  tubes,  including  metal  and  the  battery-operated  2-volt  series. 


MT.  CARMEL 
ILLINOIS 


A    FAMOUS    NAME    FOR    TWO    DECADES 

November,  1938  35 


METER  RANGES  VS.  ACCURACY 

Selection  of  instruments  having  proper  scales 
increases  dependability  of  measurements 


By  Vinton  K.  Uieich,  Service  Editor 

•  The  choice  of  a  voltmeter,  mil- 
liammeter,  or  ohmmeter  having  the 
proper  ranges  or  scales  may  often  be 
more  important  than  the  rated  accu- 
racy of  the  instrument.  Or  to  say  it 
another  way,  an  instrument  designed 
with  ranges  unsuitable  for  radio  ser- 
vicing may  give  inaccurate  results 
when  used  for  set  testing. 

The  logic  behind  this  statement  is 
apparent  when  one  considers  how  in- 
struments operate  and  are  rated  for 
accuracy. 

While  meters  are  usually  rated  as 
2  per  cent  (or  5  per  cent),  the  com- 
plete statement  of  accuracy  usually 
reads  as  follows,  "the  meters  are  ac- 
curate within  2  per  cent  of  the  full- 
scale  reading."  This  means  that  the 
maximum  allowable  meter  error  may 
be  plus  or  minus  2  per  cent  of  the 
full-scale  reading. 

Per  cent  vs.  absolute  error 

Taking  a  specific  example,  such  as 
a  100  volt  copper-oxide  AC  meter,  the 
usual  rating  is  5  per  cent.  The  error 
at  any  point  on  the  scale  may  be  as 
great  as  5  per  cent  of  100  or  5  volts 
(often  it  is  less).  The  numerical 
value  of  the  maximum  absolute  error, 
5  volts,  remains  constant  over  the  en- 
tire scale.  Since  the  numerical  value 
of  the  error  is  a  constant  factor,  the 
percentage  of  the  error  increases  for 
less  than  full-scale  deflection  of  the 
meter.  A  5  volt  variation  at  50  volts 
represents  10  per  cent.  Likewise  at 
10  volts,  a  5  volt  variation  is  50  per 
cent.  (For  a  2  per  cent  meter  at  10 
volts  the  variation  permissible  would 
be  2  volts  or  20  per  cent.) 

However,  the  meter  is  still  within 
the  rating  of  the  manufacturer's  accu- 


Fig.  1 — The  shadow  of  doubt  in  a  me- 
ter reading  remains  constant  in  width, 
but  increases  in  percentage  for  decreas- 
ing needle  deflections. 

racy.  This  type  of  rating  applies  to 
instruments  of  all  manufacturers.  For- 
tunately, meters  are  usually  more  ac- 
curate than  the  rating,  since  the  rat- 
ing is  given  for  the  purpose  of  taking 
into  account  many  sources  of  errors 
that  might  occur,  but  generally  do  not. 

However,  there  always  is  the  pos- 
sibility that  a  10  volt  reading  on  a 
100  volt  meter  with  a  5  per  cent  rat- 
ing may  actually  be  50  per  cent  in 
error. 

In  Fig.  1  a  typical  meter  scale  is 
shown  for  the  purpose  of  illustrating 
how  the  meter  accuracy  may  vary 
with  the  deflection.  The  shaded  areas 
at  10,  25,  50,  75,  and  100  volts  show 
what  the  maximum  variation  might  be 
at  those  points.  For  a  5  per  cent  me- 
ter, the  variation  is  5  volts.  The  per- 
centages   of    the    maximum    allowable 


«.„ 

O20 
ae 

iii 

1 

1           1 

MAXIMUM    ALLOWABLE    ERROR 

z 

1 

v<; 

-15 

UJ 

\ 

_                                                 V  9.                                                      

DEFLECTION 

< 

UJ 

gio 

■  z 

u. 
o 

0=5 

o 

1- 
o 

If  o 

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" 

O                          25                          50                          75                         IOO 
PERCENT  OF   FULL  SCALE    DEFLECTION 

Fig.  2 — The  maximum  allowable  meter  error  increases  very  rapidly  for  deflections 

less  than  one-third  of  full  scale.    To  find  the  per  cent  error,  multiply  the  factor  of 

increase  in  error  by  the  per  cent  rating  of  the  meter. 


error  for  each  point  are  given.  (Note 
that  we  say  maximum,  not  average.) 
Looking  at  the  error  from  another 
viewpoint,  one  sees  that  the  maximum 
error  for  a  meter  with  a  uniform  scale 
is  inversely  proportional  to  deflection 
of  the  meter.  A  reading  at  y5  of  full 
scale  may  have  a  percentage  error  of 
5  times  that  of  full  scale.  Likewise 
the  error  at  %  may  be  three  times  as 
great  as  shown  in  Fig.  2.  The  maxi- 
mum allowable  absolute  error  of  a 
meter  is  constant  over  the  entire  scale. 

Overlapping  ranges 

Fortunately,  radio  service  instru- 
ments are  designed  with  more  than 
one  range.  Many  meters  have  5  or 
more  ranges.  If  the  overlap  of  2 
ranges  of  a  meter  is  4  to  1  such  as 
25  and  100  volts,  the  maximum  per- 
centage error  that  one  gets  on  the 
100-volt  range  in  the  vicinity  of  2  5  to 
30  volts  is  about  4  times  the  full-scale 
value.  The  reason  for  this  is,  that 
when  the  voltage  is  2  5  or  less,  one 
uses  the  25-volt  range  rather  than  the 
100  volt  range.  If  the  voltage  is  just 
above  25  volts  it  is  necessary  to  use 
the  100  volt  range — and  this  higher 
range  at  Vi  of  full  scale  may  have  a 
percentage  error  as  great  as  4  times 
the  rated  error.  As  the  deflection  in- 
creases, the  error  reduces,  until  at 
full  scale,  the  maximum  allowable 
error  is  equal  to  that  of  the  manu- 
facturer's rating. 

When  comparing  a  reading  on  one 
range  with  that  shown  on  a  second 
range,  the  serviceman  should  remem- 
ber that  the  error  on  one  range  may 
be  plus,  while  that  on  another  range 
may  be  minus.  Thus  if  the  errors  op- 
pose each  other,  the  difference  in  the 
readings  on  the  two  scales  will  be  the 
sum  of  the  two  errors.  Likewise  may 
be  true  if  two  separate  meters  are 
compared. 

Comparing  meter  readings 

Also  when  comparing  meter  read- 
ings, additional  apparent  errors  may 
be  introduced  by  loading  effects  of  the 
instruments  upon  the  circuits.  Cir- 
cuit changes  can  and  do  influence  the 
readings  of  instruments  as  every  ser- 
viceman  knows,    but   often    overlooks. 

If  the  overlap  of  the  meter  ranges 
is  2  to  1,  then  the  maximum  possible 
error  occurs  just  at  half  scale,  since 
deflections  of  less  than  half-scale  would 
be  measured  on  the  lower  range.  At 
50  volts  on  a  100  volt  range,  the  per- 
centage error  may  be  twice  that  of 
full  scale. 

From  this  discussion  of  overlapping 
ranges,  it  becomes  apparent  that  the 
maximum  percentage  errors  in  meas- 
urements are  directly  proportional  to 
the  ratio  of  the  ranges.  This  relation- 
ship is  illustrated  in  Figs.   2   and   3. 

As  a  concrete  example  of  how  impor- 


36 


Radio  Today 


Fig.  A — For  an  ohmmeter  the  possible 
errors  are  greater  than  those  of  the  me- 
ter   movement    itself    because    of    the 
non-linear  scale. 

tant  it  is  to  have  a  small  ratio  in  the 
overlap  of  instrument  ranges,  the  fol- 
lowing example  is  offered.  A  multi-range 
meter  may  have  scales  of  10  and  100 
which  are  rated  at  2  per  cent.  An- 
other meter  may  be  rated  at  5  per  cent 
and  have  ranges  of  5,  10,  25,  50,  100. 
At  25  volts  the  2  per  cent  meter  may 
be  in  error  by  8  per  cent,  while  the 
5  per  cent  meter  on  the  25  volt  scale 
has  an  error  no  greater  than  5  per 
cent.  At  15  volts  the  error  of  the  2 
per  cent  meter  may  be  about  14  per 
cent,  while  that  of  the  5  per  cent  me- 
ter may  be  about  8  per  cent.  This 
relation  is  shown  graphically  in  Fig.  3. 
The  serviceman,  however,  should  not 
get  the  idea  that  it  is  advisable  to  buy 
less  accurate  meters  with  greater  over- 
lap of  the  ranges.  The  more  accurate 
meters  are  usually  held  closer  to  tol- 
erances than  indicated  by  their  rat- 
ings— that  is,  they  are  more  conserva- 
tively rated.  The  comparisons  have 
been  made  in  terms  of  maximum  pos- 
sible errors  rather  than  those  most 
commonly  encountered. 

Choice  of  ranges 

In  addition  to  meters  having  closely 
overlapped  ranges,  it  is  desirable  that 
the  ranges  be  chosen  in  so  far  as  is 
practical,  so  that  the  voltages  to  be 
measured,  fall  somewhere  near  full 
scale.  If  the  majority  of  voltages  to 
be  measured  lie  between  250  and  300 
volts,  a  full-scale  range  of  300  is  pre- 
ferable to  500;  for  on  a  500  volt  range, 
most  of  the  readings  would  be  50  to  60 
per  cent  of  full  scale.  Thus  the  per- 
centage error  would  be  about  twice 
that  of  the  meter  rating.  On  the  300 
volt  range,  the  maximum  error  would 
be  only  1.2  times  that  of  the  meter 
rating.  Just  by  choice  of  suitable 
ranges,  the  error  is  reduced  to  60  per 
cent  of  what  it  might  have  been. 

For  this  reason  the  radioman  should 
take  into  account  what  ranges  he  uses 
on  his  meters.  Likewise  using  the  seme 
thinking,  a  meter  that  was  ade- 
quately designed  for  measurement 
on  1928  sets  is  not  so  suitable  for 
19  38  sets,  because  the  voltage  ranges 
found  in  present  day  sets  are  quite 
different  from  those  of  ten  years  ago. 

When  the  type  71  was  in  its  hey- 
dey,  180  volts  was  about  maximum. 
Today  300  is  very  common,  and  250 
usual.  The  200  volt  range  that  was 
ideal  in  1928,  is  of  much  less  value  in 
1938. 


Even  though  the  same  old  meters 
may  be  perfect  as  far  as  their  accu- 
racy is  concerned,  many  of  them  are 
unsuitable  because  the  ranges  are  not 
what  are  needed  for  present  day  ser- 
vicing. 

Summing  up  the  discussion,  one  can 
state  that  the  ranges  of  the  meters  em- 
ployed for  radio  servicing,  should  be 
of  such  values  that  most  commonly 
measured  voltages  are  on  the  upper 
third  of  the  scale,  and  the  ratio  of  the 
overlapping  ranges  should  be  rather 
low. 

It  follows,  therefore,  that  a  service- 
man handling  battery  receivers  al- 
most exclusively,  such  as  in  a  rural 
area,  needs  different  meter  ranges 
than  a  radioman  who  exclusively  ser- 
vices power-line  receivers. 

Non-uniform  scales 

So  far  only  uniform  ranges  or 
scales  have  been  mentioned.  Ohm- 
meters  have  scales  that  are  not  uni- 
form. At  high  end  of  the  scale  i4r 
of  an  inch  may  represent  one  ohm 
while  at  the  lower  end  i,46  of  an  inch 
may  represent  1000  ohms.  To  express 
the  accuracy  of  such  a  non-uniform 
scale  is  more  difficult  than  for  a  uni- 
form scale.  However,  basically  the 
rating  is  the  same.  Rather  than  try 
to  use  ohms  as  a  measure  of  the  accu- 
racy, it  is  easier  to  use  degrees  of  de- 
flection or  per  cent  of  the  scale  length 
in  inches.  Most  DC  meter  movements 
are  rated  at  2  per  cent.  Therefore 
for  such  a  meter,  the  error  will  not 
exceed  2  per  cent  of  the  full  scale.  If 
the  scale  length  is  4  inches,  then  2 
per  cent  is  .08  or  142  of  an  inch. 

Therefore  anywhere  along  the  scale 
of  the  meter,  the  error  may  be  as 
great  as  plus  or  minus  ^2  of  an  inch. 
At  half  scale  on  a  meter  having  a  mid- 
scale  reading  of  45  ohms,  the  error 
may  be  3%  ohms.  On  a  percentage 
basis  it  is  equal  to  81.4  per  cent  error. 
For  one-fourth  scale  deflection,  the 
error  in  inches  is  still  1,42  inch,  but  is 
equal  to  15.7  ohms,  or  11.6  per  cent, 
of  13  5.  These  relationships  are  shown 
in  Fig.  4.  At  450  ohms  on  the  scale 
the  error  is  30.7  per  cent. 

Since  the  error  gets  rather  high  at 
low  values  of  deflection  it  is  necessary 
to  have  a  rather  small  overlap  factor. 
A   factor   of   10   is   satisfactory.     This 


means  each  range  is  10  times  greater 
than  the  preceding  one. 

It  is  interesting  to  note,  that  as  far 
as  accurate  readings  are  concerned,  the 
lower  fourth  of  the  scale  is  of  little 
value.  As  a  result  here  at  Radio  Today, 
we  prefer  to  take  the  center-scale 
value  rather  than  the  extremity  as  an 
indication  of  the  range.  The  center 
scale  point  is  approximately  140  0I  tne 
usable  range  of  an  ohmmeter  scale.  If 
the  divisions  at  the  high-resistance 
end  of  the  scale  are  made  small 
enough,  it  is  possible  to  have  a  top 
resistance  range  of  almost  any  desired 
value.  As  a  result,  ohmmeters  made 
by  two  manufacturers  having  the  same 
center  scale  reading,  may  have  en- 
tirely different  top  ranges,  depending 
merely  on  how  small  a  deflection  is 
calibrated  on  the  scale  near  the  in- 
finity point. 

Before  concluding,  it  might  be  well 
to  call  attention  to  the  fact  that  some 
instruments  are  rated  as  having  meters 
with  2  per  cent  (or  5  per  cent)  accu- 
rate movements.  This  notation  ap- 
plies only  to  the  meter  itself,  and  the 
resistors  may  be  less  accurate.  Like- 
wise, meters  are  sometimes  described 
as  having  resistors  of  1  per  cent  (or 
other  value).  This  does  not  neces- 
sarily mean  that  the  movement  is  that 
accurate. 

Need  for  accurate  meters 

Another  thing  that  the  serviceman 
must  consider  is  that  his  instruments 
should  have  a  rated  accuracy  better 
than  the  required  accuracy  of  his 
measurements.  Often  radiomen  won- 
der why  their  instruments  should  be 
so  accurate,  when  the  tolerance  in 
radio  sets  is  usually  10  to  20  per  cent 
for  resistors  and  condensers  and  about 
10  per  cent  for  voltages.  The  reason 
for  the  greater  accuracy  in  the  instru- 
ments is  for  the  reasons  discussed  pre- 
viously; namely  that  the  allowable 
error  of  the  meter  increases  as  the 
deflections  become  smaller. 

Instead  of  looking  at  meters  in  terms 
of  the  highest  ranges,  the  serviceman 
should  consider  instruments  in  terms 
of  overlapping  ranges  and  the  choice 
of  ranges  that  are  most  suitable  for 
measuring  the  voltages,  currents,  and 
resistances  used  in  his  everyday  work. 


5X-5V  SCALE       MAXIMUM     ALLOWABLE   ERROR 


DEFLECTION 


-2%  -IOOV    SCALE 


-5%-IOOV  SCALE 
£—5%- 50V  SCALE     --»«,^      I 


-5X-I0V     / 
SCALE     ^-BX-ZSV  SCALE 

-2%-IOV  SCALE 


Fig.  3 — By  using  closely  overlapped  ranges,  the  error  due  to  the  necessity  of  tak- 
ing readings  for  small  deflections  is  eliminated.     Note  that  the  5  per  cent  meter 
represented  by  the  dotted  lines,  in  some  cases  has  a  lower  allowable  error  than 
the  2  per  cent  meter  (solid  lines). 


November,  1938 


37 


ELECTRICAL  FLASHES 

First  1939  refrigerators  appear  this  month 


*  To  catch  this  year's  holiday 
trade  with  next  year's  models,  Stew- 
art-Warner Corp.  will  introduce  new 
lines  at  a  national  convention  of  dis- 
tributor execs  at  the  Edgewater  Beach 
Hotel,  Chicago,  Nov.  28,  29  and  30. 
At  that  time  the  1939  Sav-A-Step 
refrigerators  will  be  shown,  and  Stew- 
art-Warner will  also  make  its  en- 
trance into  the  electric  range  market. 
An  entirely  new  finance  plan,  along 
with  new  advertising  and  promotion 
programs,  will  be  announced  by  sales 
manager  John  F.  Ditzell  and  vice- 
president  in  charge  of  sales  Frank  A. 
Hiter. 

*  Frigidaire  is  experimenting  with 
the  idea  of  frozen  food  boxes  for  home 
use.  The  device  is  said  to  be  more 
of  a  cabinet  than  a  refrigerator,  and 
will  not  compete  with  the  latter  be- 
cause it  must  have  a  temperature  of 
from  5  degrees  below  zero  to  10  above. 
The  new  boxes  are  being  advertised 
by  Frigidaire  at  $135  up. 

*  In  order  to  give  washer  and 
ironer  displays  a  quality  that  will 
dramatically  stop  passersby,  General 
Electric  has  introduced  a  series  of 
eight  displays  of  the  "shell-shock" 
type.  These  displays  emphasize  "a 
single  thought,  a  dramatic  picture, 
and  if  possible,  a  single  word,"  in  a 
special  attempt  to  arrest  the  man  on 
the  street. 


Frank   B.   Williams   is   the   new   vice- 
president  and  merchandising  head  for 
Westinghouse  Electric  &  Mfg.  Co.  He 
was  formerly  with  Diehl  Mfg.  Co. 


Here's  the  speedy  "Casco  75"  electric 
safety  razor,  which  Casco  Products 
Corp.,   Bridgeport,   Conn.,  lists  at  $10. 


RADIO  DEALERS  FIND  DIATHERMY 
PROFITABLE  TO  SELL  TO  HOMES 

Radio  short  waves  that  now  bring 
music  and  entertainment  to  millions 
of  people  can  also  bring  comfort  and 
alleviation  from  pain,  explains  Michael 
Loonan,  of  the  Scientific  Diathermy 
Corporation,  200  W.  34th  St.,  New 
York.  Thousands  of  homes  are  al- 
ready equipped  with  portable  short- 
wave radiothermy  units,  and  the  sale 
of  short-wave  radiothermy  machines  is 
fast  becoming  a  recognized  profitable 
business  for  radio  men,  so  that  soon 
every  small  town  will  have  a  dealer. 

Short-wave  radiothermy  machines 
are  really  radio  transmitting  sets. 
They  send  out  waves  which,  as  they 
penetrate  the  body,  heat  the  tissues. 
Such  short-wave  sets  are  actually 
"fever  machines."  The  waves  vitalize, 
directly  and  indirectly,  by  stimulat- 
ing circulation,  and  support  weakened 
tissues.  They  combat  invading  dis- 
ease organisms,  either  by  creating  a 
less  favorable  medium  for  the  growth 
of  bacterial  life,  or  by  promoting  at 
the  disease  area  accumulation  of  the 
defensive  reserves  of  the  body.  Among 
maladies  which  have  yielded  to  short- 
waves  are  rheumatism  and  arthritic 
conditions,  injuries  to  bones,  joints, 
nerves  and  soft  tissue,  circulatory  dis- 
turbances, sinus  infections,  prostatic 
and  vaginal  disorders. 

Prospective  buyers 

Like  radio,  diathermy  has  remained 
more  or  less  dormant  for  years  and 
then  sprang  up  overnight.  Short-wave 
radiothermy  has  many  prospects  in 
every  community.  There  is  no  reason 
why  the  radio  dealer  cannot  be  the 
one  to  profit  from  short-wave  radio- 
thermy in  his  town.  Built  in  compact 
form,  automatic  timing  devices  make 
it  easy  for  even  old  folks  to  use  dia- 
thermy with  absolute  safety.  The 
soothingly  pleasant  penetrating  radio 
rays  bring  almost  immediate  relief 
from  pain.  Although  this  method  of 
treatment  is  already  used  in  the  larger 
hospitals  and  by  doctors  in  the  larger 
cities,  there  still  remains  about  99  per 
cent  of  the  country  open  as  a  fertile 


A  nifty  centerpiece  for  a  radio  dealer's 
Christmas  window  —  a  6-color  card 
which  ties  in  with  other  items  dis- 
played, offered  by  Burgess  Battery 
Company. 


field  for  the  alert  radio  repairman  or 
radio  dealer.  Their  technical  quali- 
fications and  understanding  of  radio 
apparatus  indicate  them  as  the  logical 
outlets  in  their  respective  communi- 
ties. 

Radiothermy  units  have  been  sold 
to  homes,  hospitals,  college  football 
teams,  baseball  clubs,  gymnasiums, 
turkish  baths,  police  and  fire  depart- 
ments, chiropractors,  osteopaths,  vet- 
erinarians, physiotherapists,  masseurs, 
medical    doctors,    and    trained   nurses. 

Such  units  are  also  rented  on  a 
monthly  basis  at  a  nominal  fee,  so 
that  it  is  usually  easy  to  establish  a 
handsome  income  from  a  rental  busi- 
ness. Rentals  eventually  lead  to  sales. 
The  person  renting  the  device  finds 
out  how  easy  and  pleasant  it  is  to  get 
relief  and  in  numerous  cases  has  de- 
cided to  buy  the  unit  outright. 

Heretofore  it  was  necessary  for  in- 
valids to  leave  home  and  travel  many 
miles  to  have  access  to  short-wave 
radiothermy.  But  now  with  a  portable 
unit  in  the  home  it  is  possible  for 
anyone  anywhere  to  enjoy  the  comfort 
and  relief  from  pain  provided  by  short- 
wave heating. 


Pleasant  treatment  via  short  wave. 


38 


Radio  Today 


A  Doifllbfe  Feature  Thafc 
Loaded  With  Profits! 


40th  Anniversary 


,    cnles  Celebration 
Victrola  Sales 


These  two  sensational  RCA  Victor  promotions 
are  boosting  dealers'  sales  higher  every  day! 
Use  one  for  a  week!  Then  use  the  other! 
Keep  switching  from  week  to  week  and  watch 
your  sales  leap  upward! 


■■H^^^^  ater  sales! 


iP*^"  ,vCekbration  has 

7,oth  Anniversary^       increases. 

^^ueljold  set,  '^victor  40th  A*«* ' 
lhenpS-e  of  the  KCAjs  als  to  «£,  *  is 

^iola  (iU^eTthltntosaveS4°      |  Also 


For  finer  radio  pen  


*EXTRA! 


An  extra  sales  aid!  TheRCA Victor  3-Way 
Offer  entitles  your  customers  to  the  new 
40th  Anniversary  Album  of  Victor  Rec- 
ords. Worth  $10.50,  it  contains  record- 
ings covering  popular,  classical  and  sym- 
phonic music  by  eleven  of  Victor's  out- 
standing artists.  If  your  customers  wish, 
they  may  have  their  choice  of  $9  worth 
of  Victor  or  Bluebird  Records  instead. 


November,  1938 


'R£\ 


K&U/ictSb 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
A  Service  of  the  Radio  Corporation  of  America 


39 


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40 


Radio  Today 


*ggf4flCEf?S 

NEW 

"LIGHT  AND  RADIO" 


HERE'S  the  greatest  money  making  opportunity  in 
years!  A  chance  to  boost  j arm  radio  sales  and  triple 
your  daily  profits.  Made  possible  by  Wincharger's  new 
HEAVY  DUTY  6-VOLT  charger— the  outstanding 
6-volt  unit  on  the  market  today.  Actually  puts  out  100% 
MORE  current  than  any  other  6-volt  charger.  Generates 
enough  current  for  all  the  Electric  Lights  and  Radio 
Power  the  ordinary  farm  family  can  use.  Starts  charging 
in  a  6-mile  breeze.  Has  a  top  output  of  2  5  amperes. 
Opens  up  a  brand  new  market  for  radio  dealers  in  low 
wind  areas.  Equipped  with  a  giant  oversize  7Vi  inch 
generator  and  7%  foot  patented  Air  Foil  Propeller. 
Furnished  with  10  foot  tower.  List  price  $39-95  F.O.B. 
Sioux  City,  Iowa,  with  a  liberal  profit  margin  for  dealers. 
Available  January  1st  in  both  6  and  12  volt  capacities. 

NEW  Piopt  Package.  GREATEST  VALUE 
EVER  OFFERED  THE   FARM   MARKET 

This  new  "Light  and  Radio"  Profit  Package  is  a  "natural"  for 
the  farm  market.  Wrapped  up  in  a  package  for  the  first  time  is 
everything  the  farmer  needs  for  plenty  of  electric  lights  and 
radio  power  .  .  .priced  at  a  figure  every  farmer  can  afford. 
Early  indications  point  toward  an  enthusiastic  consumer  ac- 
ceptance for  this  "Light  and  Radio"  Package.  Don't  hesitate. 
Stock  up  early!  Use  this  proved  plan  of  merchandising  "free 
power"  for  electric  lights  to  stimulate  your  farm  radio  sales, 
boost  your  dollar  volume,  and  triple  your  profit  per  sale. 


WINCHARGER  CORP. 


SIOUX  CITY 
IOWA 


November,  1938 


41 


MORE  SOUND  SALES 

Indoor  installations  are  the  center  of  interest 


safe,  instructive,  cheap,  novel,  and  of 
practical  use  to  themselves. 

Mr.  Kassler's  new  "Junior  Execu- 
tive Intercommunicator"  comes  in  a 
Bakelite  case  and  is  of  course  suit- 
able for  use  in  offices,  factories,  stores, 
schools,  etc. 


NEW  PA  SYSTEM  FOR 
HOSPITALS  DITCHES  BELLS 

To  solve  the  hospital  problem  of 
locating  doctors  and  personnel  quickly 
and  pleasantly,  without  disturbing 
patients,  a  new  type  selective  paging 
system  has  been  installed  at  Boches- 
ter,  N.  T.,  General  Hospital.  The 
irritating,  shrill-toned  bells  have  been 
eliminated. 

Over  a  regular  broadcasting  micro- 
phone in  a  sound-proofed  studio,  mes- 
sages go  to  any  one,  any  combina- 
tion, or  every  one  of  60  stations.  Any 
part  or  every  nook  and  corner  of  10 
acres  of  floor  space  in  the  hospital 
buildings  can  be  reached  at  the  same 
instant.  Such  fast  paging  gets  the 
doctor  in  the  shortest  possible  time — 
and  when  the  doctor  is  really  needed, 
time  is  the  vital  consideration. 

It  uses  low-toned,  low-volume 
speakers    covering    only    small    areas. 


Because  of  tremendous  variation  in 
the  acoustical  characteristics  of  vari- 
ous corridors,  each  station  has  a 
separate  volume  control  which  has 
been  accurately  adjusted  to  deliver 
just  the  right  volume  required  in  its 
particular  location. 

There  are  87  lines  radiating  from 
the  telephone  switchboard  and  not 
infrequently,  in  the  past,  the  opera- 
tors had  to  try  more  than  50  of  these 
in  locating  desired  persons.  "With  the 
new  system  in  operation,  many  calls 
will  be  heard  over  single  stations 
only.  In  fact,  two-thirds  of  the  sta- 
tions, the  ones  which  handle  the  vast 
majority  of  the  calls,  are  not  within 
hearing  of  patients.  And  yet  in  an 
emergency,  when  time  is  valuable, 
depressing  a  single  key  will  route  the 
call  over  all  stations. 

A  series  of  special  signals  has  been 
arranged  to  promote  the  two-way 
efficiency  of  instant  paging  without 
undue  noise.  One  is  the  mellow  tone 
of  Westminster  chimes  that  calls 
doctors  to  clinical  or  departmental 
meetings.  Another  is  the  soft  tick- 
ing of  an  electronome  which  calls  the 
Night  Nursing  Supervisor.  The  tick 
can  be  heard  only  a  few  feet  from 
the  stations  and  cannot  disturb  pa- 
tients. 


FASHIONS  IN  PUBLIC  ADDRESS 

In  shops  where  dresses  are  being 
designed  and  sold,  it  appears  that 
store  managers  are  becoming  sound- 
conscious.  It's  another  place  for  pub- 
lic address  men  to  sell  their  systems. 

Background  music  is  being  used  by 
11  dress  houses  in  New  York  City, 
according  to  a  survey  by  the  magazine 
Variety.  The  garment  executives 
have  found  that  the  music  keeps  the 
customers  from  standing  around  and 
chatting,  when  they  should  be  watch- 
ing the  models  display  the  gowns. 
Voices  must  be  raised  or  stopped,  and 
most  of  the  dress  buyers  will  obvious- 
ly choose  the  latter. 

SOUND  FOR  HOTELS 

E.  M.  Lurie,  of  American  Com- 
munications Corporation,  New  York 
City,  was  the  author  of  the  excellent 
article  on  "Sound  for.  Hotels"  which 
appeared  on  pages  38  and  39  in  the 
Selling  Sound  section  of  the  October 
issue  of  Eadio  Today.  Mr.  Lurie  has 
had  wide  experience  in  providing 
sound-equipment  installations  for  ho- 
tels and  other  institutions,  and  his 
article  contained  much  practical  in- 
formation growing  out  of  his  special 
knowledge  of  this  field. 


Bell  tones  and  code  signals  from  the 

speaker    in    upper    right    corner    fall 

softly    on    the    ears    of    patients    at 

Rochester   hospital. 


COMMUNICATORS 
FOR  YOUNGSTERS 

An  important  sales  idea,  involving 
all  the  children  of  the  TJ.  S.,  has  been 
advanced  for  the  benefit  of  dealers 
selling  smaller-unit  intercommunica- 
tors.  The  youngsters  like  to  use 
these  instruments  as  educational  toys, 
and  if  properly  approached,  their 
parents  will  be  shopping  for  them  at 
Christmas  time.  The  kids  want  the 
units  to  use  in  playing  "big  boss", 
various  "spying"  games,  in  imitating 
radio  stars,  in  staging  their  own 
"amateur  hours",  for  "playing  thea- 
ter", and  to  use  as  a  radio  extension. 

Much  of  this  appeal  has  been 
worked  out  by  Louis  Kassler,  of 
Elkay  Mfg.  Co.,  200  Fifth  Ave.,  New 
York  City,  a  toy  manufacturer  who 
decided  that  a  small,  low-priced  elec- 
tric intercommunicator  would  be  a 
"natural"  as  a  gift  for  the  youngsters. 
Barents   like   the   idea  because   it  is 


Electrically  amplified  music  is  used  by 
the  Philadelphia  Symphony  Orchestra 
— member  Edgar  Stanistreet  points  to 
the  Amperite  Kontak  mike  he  used 
for  solos. 


42 


Radio  Today 


CORRELATION  OF  TUBE  TYPES 

The  correlation  of  tube  types  on 
page  40  is  made  available  to  give  a 
better  understanding  of  the  tubes 
which  have  "similar"  and  "equivalent" 
characteristics.  These  types  are  listed 
in  two  separate  columns  for  conve- 
nient reference,  and  were  compiled  by 
the  engineering  department  of  Hy- 
grade  Sylvania  Corp. 

Equivalent  types 

The  tubes  listed  as  "equivalent"  are 
those  which  have  electrical  character- 
istics and  circuit  applications  equiva- 
lent to  the  listed  types.  It  is  not  im- 
plied that  the  tubes  listed  as  "equiva- 
lents" are  interchangeable.  However, 
many  of  them  are  directly  interchange- 
able, or  interchangeable  by  a  slight 
change  in  circuit  constants.  Such  types 
are  marked  with  an  asterisk  (*).  This 
interchangeability  is  particularly  true 
in  the  case  of  "G"  and  metal  tube 
equivalents.  Realignment  of  the  tuned 
circuits  may  be  necessary  in  some 
cases  when  interchanging  such  tubes, 
and  an  external  shield  may  be  re- 
quired on  the  "G"  types.  The  other 
equivalent  types  not  marked  with  an 
asterisk  (*)  are  identical  only  in  elec- 
trical characteristics,  the  basing  or 
filament  rating  being  different  so  that 
interchangeability  is  impossible  unless 
socket  changes  and,  in  some  cases,  cir- 
cuit changes  are  made.  For  this  type 
of  modernization  work  this  chart  will 
be  invaluable. 


Similar  types 

The  tubes  listed  as  "similar"  are 
those  which  have  electrical  character- 
istics and  circuit  applications  similar 
to  the  listed  types.  Such  tubes  are  not 
directly  interchangeable  unless  marked 
with  an  asterisk  (*).  However,  the 
aggressive  serviceman  can  obtain  in- 
formation from  the  "similar"  listings 
which  will  enable  him  to  modernize 
obsolete  receivers  with  new  types  of 
tubes.  The  sale  of  new  receivers  should 
always  be  encouraged  rather  than  the 
idea  of  keeping  the  obsolete  ones  up-to- 
date;  but,  if  a  customer  cannot  afford 
to  purchase  a  new  receiver  and  de- 
sires to  modernize  his  set  by  substi- 
tuting the  newer  type  of  tubes  for  the 
original  one,  the  conscientious  ser- 
viceman can  do  much  to  provide  this 
additional  service.  At  the  same  time 
he  will  keep  the  customer  from  becom- 
ing discouraged  with  radio. 

When  making  any  modernizing 
changes,  always  refer  to  the  operating 
characteristics  and  circuit  require- 
ments shown  in  the  various  technical 
manual  or  characteristic  sheets  so  that 
full  benefit  of  the  changes  will  be  re- 
ceived and  no  tube  will  be  used  in 
such  a  way  that  it  will  be  abused. 


Television  picture  tube,  the  National 
Union  type  2005,  is  the  subject  of  a  new 
technical  bulletin  released  by  National 
Union  Radio  Corp.,  57  State  St.,  New- 
ark, N.  J.  Besides  the  data  on  the  tube 
itself,  the  booklet  carries  a  complete 
description  and  illustration  of  a  prac- 
tical television  receiver  circuit,  with 
detailed  list  of  necessary  parts.  Tele- 
vision experimenters  may  obtain  alt 
these  parts  at  a  total  cost  of  about 
$3  00. 


Ad*  SCHOOL  SOUND  SYSTEMS 
P     JREAKING  ALL  SALES 


Let 

Webster -Chicago 
help  you  Cash  in 

on  these 
BIG  UNIT  Sales 


^—      MODEL  S-40 
for  any  number  of  rooms 
to  40  .  .  . 


Model  S-40  ...  a  sectionalized  system  with 
two  channel  features  completely  installed  in 
attractive  metal  cabinet.  Highest  quality 
custom  built  refinements.  Can  be  purchased 
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to  as  building  or  budget  requirements  neces- 
sitate.    Maximum  capacity 40  rooms. 


SECTIONALIZED 

ANSWER  ALL   REQUIREMENTS 

MODEL  RP-100  > 

for  unlimited  number  of  rooms 

Model  RP-100  ...  a  custom  built  system  having  a 
basic  flexible  design  permitting  such  personal 
selection  as: 

Any  Number  of  Rooms   •    Multiple  Channel  Service 

•  Any  Number  of  Program  Originating  Points  • 
Automatic  Record-Changing  Equipment  •  Tone 
Equalization     for    Unusual     Acoustical     Conditions. 

•  Are  you  going  to  share  in  the  profits  of  school 
installations?  Don't  let  the  fact  that  they  run  into 
big  figures  stop  you.  As  designed  by  Webster- 
Chicago,  installation  of  either  system  is  relatively 
very  simple  and  satisfactory  performance  is  as- 
sured from  our  15  years'  experience. 
Beautiful  2-color  literature  available  for  mail  work 
or  direct  solicitation.  Ask  your  jobber  or  write 
for  more  information. 


COMPLETE  SPECIFICATIONS 
AVAILABLE  FOR  MAILING  TO 
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arch   Products,  Inc.,  tub- 

WEBSTER-CHICAGO  ££$*§££ 

5622  Bloomingdale  Ave.,  Chicago,  Illinois     Telephone  and  Teleeraph  Co. 


November,  1938 


43 


ANNUAL 

EXPORT 

ISSUE 


arn 


BUYERS' 
INDEX 

December   Issue 
of 


RADIO 
TODAY 


The  Only  ALL-RADIO  Medium 

Covering  the  ALL-RADIO 

Export  Market! 

An  issue  surpassing  all  pre- 
vious efforts  of  RADIO  TODAY 
in  the  foreign  field  will  give 
you  access  to  the  finest  radio 
outlets  in  all  countries  —  with 
undivided  interest  in  the  sub- 
ject of  radio. 

The  Export  Issue  puts  you  in 
touch  with  foreign  importing 
houses  who  are  able  to  make 
the  most  of  any  radio  market- 
ing opportunity. 

In  each  foreign  country  that  is 
now  a  radio  market,  the  circu- 
lation of  the  Export  Issue  will 
conform  closely  with  the  per- 
centage of  radio  exports  to  that 
country. 


22,000 


KEY     MEN     OF     THE 
RADIO  INDUSTRY  .  .  . 


PI  11^  FOREIGN  IMPORTERS, 
rLUU  WHOLESALERS  AND 
MANUFACTURERS      

Closing  Date,  December  7 

RADIO    TODAY 

480    LEXINGTON    AVE..    NEW   YORK 


SERVICE  NOTES 


MYSTERY  CONTROL  NOISE 
SUPPRESSOR  CIRCUIT 

*  In  the  explanation  of  the  Philco 
Mystery  Control  which  appeared  in  the 
October  issue  of  Radio  Today,  refer- 
ence was  made  to  the  noise  "gate"  or 
noise  suppressor  circuit.  Further  de- 
tails follow: 

The  purpose  of  this  noise  suppressor 
is  to  prevent  the  transfer  of  interfer- 
ing noise  signals  which  may  be  in- 
duced into  the  secondary  inductor  coil 
and  which  might  otherwise  lead  to 
undesired  actuation  of  the  station  se- 
lecting mechanisms,  but  to  transmit 
the  useful  control  signal. 

The  noise  suppressor  utilizes  a 
6ZY5G-  diode  connected  across  the  sec- 
ondary or  plate  circuit  of  the  6J7G 
amplifier  tube.  The  characteristic  of 
this  diode  and  its  associated  circuit  is 
such  that  it  acts  similar  to  a  low-pass 
filter  to  signals  of  short  duration  or  of 
erratic  (irregular)  occurrence;  while 
at  the  same  time  it  has  very  little 
effect  upon  signals  of  longer  duration 
or  of  a  more  regular  occurrence.  In 
other  words,  the  circuit  is  so  designed 
that  it  passes  without  attenuation, 
the  pulses  sent  from  the  Mystery  Con- 
trol dial  unit,  while  it  excludes  irreg- 
ular noise  impulses. 

In  Fig.  1  a  type  6J7G  tube  is  shown 
as  feeding  its  output  to  a  tuned  trans- 
former which  in  turn  passes  the  sig- 
nal to  the  grid  of  the  thyratron  tube. 
The  6ZY5G  diode  tube  is  shunted 
across  the  plate  of  the  amplifier  tube 
through  a  .02  mfd.  condenser.  Also  a 
750,000  ohm  resistor  is  shunted  across 
the  diode. 

Charging  condenser 

Normally  this  diode  acts  as  a  short 
circuit  across  the  transformer.  The 
.02  condenser  blocks  the  DC  plate 
voltage  from  the  diode,  and  prevents 
it  from  passing  the  DC  voltage.  If, 
however,  an  AC  voltage  (R.F.  in  this 
circuit)  is  generated  across  the  cou- 
pling transformer  by  the  amplifier 
tube,  this  AC  voltage  will  be  passed 
by  the  condenser  and  the  diode  tube 
will  rectify  it,  and  in  so  doing  acts 
as  a  low  resistance  across  the  trans- 
former, preventing  any  substantial 
signal  from  being  transferred. 

If  the  R.F.  signal  continues  this  rec- 
tified current  gradually  charges  up  the 


.02  coupling  condenser  negatively.  In 
so  doing  the  diode  is  gradually  backed 
off,  permitting  a  larger  and  larger  sig- 
nal to  be  transferred,  The  reason  for 
this  polarity  is  quite  simple  to  under- 
stand, if  the  diode  is  likened  to  the 
usual  detector.  In  the  ordinary  diode 
circuit  a  negative  voltage  with  respect 
to  the  cathode  is  created  by  the  rec- 
tifier action  of  the  tube.  If  the  un- 
grounded end  of  the  load  resistor  is 
negative,  it  follows  that  the  condenser 
will  also  be  negative  in  polarity,  or 
have  a  negative  voltage  across  it. 

Fig.  2,  shows  the  type  of  pulses  or 
signals  that  is  transmitted  by  the 
Mystery  Control  box.  It  is  a  series 
of  pulses  of  radio  frequency  energy 
that  are  equally  spaced  and  equally 
long.  When  these  pulses  are  first 
applied  to  the  6ZY5G  tube,  the 
voltage  on  the  coupling  condenser  is 
zero  (with  the  exception  of  the  DC 
plate  voltage  which  can  be  neglected). 
At  first,  the  diode  acts  as  a  short  cir- 
cuit, then  as  the  diode  starts  to  con- 
duct and  rectify  a  negative  voltage, 
the  condenser  charges  up  slowly  as 
shown  by  the  curve  labeled  Ec  .which 
is  the  voltage  across  the  condenser. 
This  permits  the  signal  transferred  to 
become  larger  and  larger  in  the  same 
order. 

Voltage  cancellation 

Before  the  first  pulse  is  over,  the 
coupling  condenser  has  been  charged 
up  to  a  negative  value  about  equal  to 
the  positive  peak  of  the  signal  repre- 
sented by  E-signal.  When  this  con- 
denser is  fully  charged,  the  negative 
voltage  across  the  condenser  (Ec) 
cancels  that  of  the  positive  peak  of 
the  signal.  Thus  the  diode  is  con- 
nected across  zero  voltage  and  no 
longer  conducts.  Looking  at  it  an- 
other way,  the  peak  signal  voltage, 
the  condenser  voltage,  and  the  diode 
are  in  series;  and  as  long  as  the  con- 
denser voltage  is  as  negative  as  the 
peak  voltage  is  positive,  there  is  no 
voltage  present  to  cause  a  current  to 
flow  in  the  diode. 

The  rate  at  which  the  condenser 
charges  up,  is  dependent  upon  the  DC 
resistance  in  the  circuit  and  the  ca- 
pacity of  the  condenser.  The  product 
of  the  capacitance  and  the  resistance 
is  known  as  the  time  constant.  This 
time  constant  is  so  adjusted  so  that 
for  signals   having  the  proper  length, 


CONT. 
AMP. 
6J7G     j                  (                                                                                            ■    _                                                smn 

AVC 
6J5G 

THYRATRON 
-  02       6ZY5G                                         f           \ 

AVC       -« — rtWft- 

3 

a 

-Aww 1-  BIAS 

750  M 

B  + 

Fig.  1 — Circuit  used  in  Mystery  Control  amplifier  for  suppressing  noise — essential 
element  is  the  6ZY5G  tube  with  its  condenser  and  resistor. 


44 


Radio  Today 


E  SIGNAL 

1 

T 

RANDOM    SIGNALS 

Fig.  2 — The  Mystery  Control  signals  cause  a  negative  volt- 
age Ec  to  build  up  on  the  condenser,  thus  stopping  the  diode 
from  conducting. 


Fig.  3 — The  noise  pulses  are  so  short  that  the  negative  volt- 
age Ec  is  not  great  enough  to  prevent  the  diode  from  con- 
ducting. 


the  voltage  will  build  up  on  the  con- 
denser during  the  first  portion  of  the 
pulse. 

"When  the  diode  is  conducting,  it 
loads  the  plate  circuit  of  the  amplifier 
tube  and  reduces  the  amplification. 
When  the  diode  current  is  largest 
(condenser  voltage  Zero)  the  load  is 
almost  a  short  circuit.  When  the  con- 
denser is  fully  charged,  the  current  is 
practically  zero — only  sufficient  cur- 
rent is  required  to  offset  the  leakage 
caused    by    the    750,000    ohm    resistor. 

Referring  to  the  Mystery  Control 
signals  in  Fig.  2,  the  latter  part  of  the 
first  pulse  is  amplified.  Then  in  the 
interval  between  the  pulses  the  voltage 
on  the  condenser  leaks  away  because 
of  the  750M  resistor.  But  the  next 
signal  pulse  comes  along  and  the  con- 


denser gradually  charges  up  to  full 
voltage,  permitting  amplification  of 
the  signal  pulse.  This  process  repeats 
until   all   the  signals  are   transmitted. 

If  the  signal  is  not  long  enough,  as 
shown  for  random  signals  in  Fig.  3, 
the  condenser  does  not  have  time 
enough  to  charge  up  fully.  Due  to 
the  nature  of  the  previous  circuits  in 
the  Mystery  Control  amplifier,  the  noise 
pulses  will  generally  be  short.  As  a 
result,  the  diode  continuously  con- 
ducts and  loads  up  the  circuit  thus 
preventing  transmission.  It  is  in  this 
manner  that  brief  noise  signals  are 
excluded  from  the  circuit — these  short 
signals  may  be  caused  by  electric 
switches,  etc. 

The  time  constant  for  the  leakage 
of  the  voltage  from   the  condenser  is 


determined  by  the  product  of  the 
capacitance  .02  and  the  resistance  of 
750,000  ohms. 

Pulses  whose  duration  is  less  than 
those  transmitted  by  the  dial  unit  will 
not  be  amplified.  This  is  because  the 
pulse  does  not  last  long  enough  to 
charge  the  condenser.  It  is  interest- 
ing to  note  that  the  noise  squelching 
characteristic  of  the  circuit  works 
even  when  the  noise  pulse  is  of  less 
amplitude  than  the  useful  signal  pulse. 

On  the  other  hand,  if  the  signals 
are  longer  than  those  of  the  desired 
control  signals,  the  stepping  relays 
and  switches  will  not  operate.  Hence 
the  complete  system  responds  only  to 
pulses  having  a  time  duration  and 
rate  approximately  equal  to  those  gen- 
erated at  the  control  box. 


November,  1938 


45 


It's  A E  IS o VOX 
.  .  .  either  way 


•  AEROYOX  offers  exact-duplicate  re- 
placements and  general-utility  conden- 
sers alike.  It  has  no  axe  to  grind. 
Arguments  in  favor  of  each,  therefore, 
are  hereby  submitted.  It's  your  own 
choice   .   .   . 

EXACT  DUPLICATES 

•  The  most  extensive  and  accurate  line 
available.  A  replacement  for  every  set. 
FITS  right,  LOOKS  right,  WORKS 
right.  Restores  set  to  its  original 
NEW  condition.  Essential  to  pleasing 
fussy  customers.  Saves  time,  trouble, 
money.  Insures  more  profitable  jobs. 
Likewise  your  future  as  a  GOOD 
serviceman. 

GENERAL-UTILITY 

•  The  AKROVOX  line  includes  ALL, 
types  of  general  utility  units — card- 
board case  and  tiny  metal-can  elec- 
trolytics,  long  and  short  metal-can 
electrolytics,  paper  tubular s»  etc.  Rec- 
ommended for  those  emergency  or 
hurry-up  jobs  where  set  owner  Isn't 
fussy   but    in    a    hurry. 

Ash  for  DATA  .  .  . 

•  Your  jobber  can  give  you  a  copy  of 
our  latest  catalog  containing  listings 
of  exact-duplicate  units.  Ask  to  see 
his    wall    chart.     Or    write    us    direct. 


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CORPORATION 

70  Washington  St  :       :  Brooklyn,  N.  Y. 

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NEW  RSA  CHAPTERS 

RSA  has  affiliated  during  the  past 
several  weeks,  the  Lehigh  Valley  Ra- 
dio Service  Association  of  Allentown, 
Penna.,  under  the  direction  of  T.  W. 
Reichard,  president;  J.  A.  Muthart, 
treasurer;  H.  H.  Fillrnan,  secretary; 
the  Hartford  Institute  of  Radio  Tech- 
nicians, under  the  direction  of  Gerald 
Miller,  chairman;  James  H.  Smith, 
Jr.,  secretary;  Kenneth  G.  Anderson, 
treasurer.  These  two  groups  repre- 
sent two  of  the  oldest  established 
local  associations  in  the  country. 

Also  a  Washington,  D.  C,  chapter 
has  been  formed  under  the  direction 
of  J.  B.  Austin,  Jr.,  as  chairman;  Pat 
Hendrican,  secretary;  Bill  Carrick, 
treasurer. 


Chapter  news 

Danville,  111. — Local  charter  of  the 
chapter  was  presented  by  Joe  Marty, 
Jr.,  RSA  executive  secretary,  at  a  re- 
cent meeting.  A.  G.  Mohaupt  lec- 
tured on  the  "Uses  of  the  Signal  Gen- 
erator in  Service  Work."  Consid- 
erable membership  activity  is 
planned. 

Staten  Island,  N.  Y. — Annual  picnic 
held  recently  for  177  persons.  Mo- 
tion pictures  were  shown  and  re- 
freshments served. 

Peoria,  III. — In  conjunction  with 
the  Klaus  Radio  Co.,  a  meeting  was 
held  Oct.  2  7th,  at  which  the  RCA 
Victor  engineers  presented  outstand- 
ing features  of  the  new  RCA  line. 
Peoria  will  have  the  pleasure  of  hear- 
ing Russ  Lund  of  the  Clough  Brengle 
Co.  on  "Dynamic  Testing." 

Quincy,  111. — Russ  Lund  of  the 
Clough  Brengle  Co.  talked  on  "Dy- 
namic Testing  of  Radio  Receivers." 
Local  charter  of  the  Quincy  Chapter 
was  presented  by  the  executive  secre- 
tary. 

Cleveland,  Ohio — One  of  the  best 
meetings  in  its  history  when  Mr. 
Trammell  and  Mr.  Kendall  gave  a 
serviceman's  discussion  of  Rider's 
Chanalyst.  These  two  men  developed 
the  uses  and  applications  of  the  Chan- 
alyst in  ordinary  service  work. 


Minneapolis,   Minn. — Host  to   over 
150    servicemen,    including   the   RSA 


group  from  St.  Paul,  at  a  recent  meet- 
ing when  John  Potts  gave  the  com- 
plete story  of  the  Chanalyst.  Chair- 
man of  the  Minneapolis  group  is  For- 
rest A.  Nelson. 

Green  Bay,  Wis. — All  efforts  of 
this  chapter  will  be  placed  on  a  shin- 
dig to  be  held  during  the  Christmas 
season  for  all  the  members,  wives  and 
guests.  A.  J.  Nejedlo  was  elected 
chairman  to  make  arrangements. 

Fremont,  Ohio— On  Oct.  24th,  Mr. 
Scott  of  the  Clough  Brengle  Co.  gave 
the  complete  story  on  Dynamic  Test- 
ing for  Radio  Receivers,  with  dem- 
onstrations. 

Newark,  N.  J. — A  concentrated 
membership  drive,  directed  by  Harry 
Miller,  is  under  way.  Important  point 
in  the  program  is  the  use  of  adver- 
tisements in  local  newspapers  in  each 
county  in  the  state.  These  ads  stress 
the  necessity  of  good  radio  service 
and  particularly  the  kind  extended 
by  RSA  members. 

Buffalo,  N.  Y. — Annual  banquet 
planned  for  Nov.  16th.  Annual  bowl- 
ing party  was  held  on  Nov.  8th. 

Boston,  Mass. — Director  Saunders, 
20th  District  of  RSA,  explained  in 
detail  the  workings  of  the  oscillo- 
scope. On  Oct.  2  4th  a  discussion  was 
held  on  the  Chanalyst.  Future  meet- 
ings are  under  the  direction  of  Wil- 
liam Wells  and  Hyman  Leve.  Ingvar 
Paulsen,  the  well-known  secretary,  is 
still  on  duty  after  many  years. 

Ogden,  Utah — A  publicity  program 
to  acquaint  the  public  with  the  value 
of  good  radio  servicing  is  under  way. 
At  a  recent  meeting  a  demonstration 
of  the  new  Philco  Mystery  Control  by 
Lamont  Boothe  and  Ted  Olson  of  the 
Ogden  Chapter  was  enjoyed  by  all 
members. 

Chicago,  111. — Meeting  on  Oct.  12tb 
at  which'  an  engineer  from  the  Ben- 
dix  Radio  Corp.  went  into  detail  con- 
cerning the  servicing  and  maintenance 
of  modern  aeroplane  receivers.  Neal 
Austin,  chairman  of  the  Barter  and 
Exchange  Committee,  is  rapidly  ac- 
quiring a  knowledge  of  the  numerous 
things  that  servicemen  want  to  get 
rid  of.  Lew  Evans,  Shops  Standards 
Committee,  went  very  thoroughly  into 
the  costs  of  doing  radio  servicing  at 
a  recent  meeting. 


KEN -RAD 


DEPENDABLE 


H    \    "I  I    O 


46 


Radio  Today 


Decatur,  111. — Extensive  publicity 
and  advertising  program  launched  to 
acquaint  the  general  public  of  the 
type  of  service  work  extended  by 
RSA  members.  This  was  done  to 
counteract  the  ill  affects  on  the  radio 
servicing  industry  by  virtue  of  the 
action  of  so-called  radio  mechanics 
who  are  daily  fleecing  the  public.  Nov. 
1st  A.  G.  Mohaupt  was  a  lecturer  at  a 
closed  meeting. 


Regional  meeting 

A  combined  meeting  of  all  the 
chapters  in  the  9th  District  of  RSA 
was  held  in  Pontiac,  Mich.  Nov.  1st. 
Fifty  men  representing  the  officers 
and  executive  heads  of  committees  of 
all  the  chapters  had  dinner,  followed 
by  entertainment.  Speaker  of  the 
evening  was  Mr.  Joe  Marty,  Jr.,  exec- 
utive secretary,  who  outlined  the 
progress  of  the  RSA  to  date  and  gave 
some  idea  as  to  the  future  plans. 
Local  charters  were  presented  to  the 
Flint,  Detroit,  and  Pontiac,  Michigan, 
chapters. 


CHICAGO  JOBBER  STAGES 
DYNAMIC  TEST  DEMONSTRATION 

Over  100  radio  service  men  of  Chi- 
cago and  northeastern  Illinois,  were 
recent  guests  at  a  big  demonstration 
of  "latest  time-saving  methods  of  dy- 
namic analysis  with  cathode  ray" 
staged  by  the  Chicago  jobber  Lukko 
Sales  Corp.  Lukko  technician  Harold 
Justice  appeared  at  the  meeting  with  a 
14-point  step-by-step  check-up  on  a  mod- 
ern receiver,  using  the  much-discussed 
dynamic  test  chart  recently  published 
by  Clough-Brengle  Co. 

Service  men  were  greatly  interested 
in  the  presentation  of  "A  uniform  test 
procedure  that  would  completely  check 
every  set,  as  assurance  of  complete 
satisfaction  to  customers  and  protec- 
tion of  service  men  against  unprofit- 
able re-work."  Lukko  president  William 
(Bill)  Schoning  was  host  to  the  gather- 
ing. 


S.I.C.  SERVICE  FORUM 


Every  Wednesday  evening  at  8 
P.M.  the  Supreme  Instruments  Corp. 
service  forum  is  conducted  by  Bruce 
Burlingame  at  Room  416,  130  W. 
42nd  St.,  New  York  City.  All  ser- 
vicemen are  invited  to  attend  these 
free  lectures  and  participate  in  the 
discussions. 

Bring  your  service  problems  and 
questions  on  instrument  applications 
for  discussion  and  solution.  Demon- 
strations at  every  meeting,  using 
latest  equipment  and  methods.  Re- 
cent topics  have  been:  "Condenser 
leakage — its  causes,  and  methods  of 
measurement,"  "Reasons  for  width 
and  shape  of  resonance  curves." 


Bulletin  No.  140,  with  brief  descrip- 
tions of  a  series  of  measuring  instru- 
ments, has  been  issued  by  Shallcross 
Mfg.  Co.,  10  Jackson  Ave.,  Collingdale, 
Pa.  It  also  includes  a  list  of  the  stand- 
ard size  Shallcross  wire  wound  re- 
sistors. 


on9t  Take  Our 
Word  For  It  I 


Read  what  these 

SERVICEMEN 

say  about 


TV 

'-'V'  ■""■'"■  Net5iuy.su        -m 

rider  Lhanalyst 


^^^^^m 


"It's  the  easiest  thing  to  use  in 
my  shop  .  .  .  does  away  with 
oil  guesswork  and  speeds  up 
our  service  work.  ...  I  put  it  to  work  as  soon 
as  I  got  it  and  have  been  using  it  every  day 
since,  on  large  and  small  jobs." — M.  Godschall. 
"I  have  had  better  results  with 
the  Electronic  Voltmeter  (in  the 
Chandlyst)  than  any  other  out- 
put indicator  I  have  tried.  I  have  iound  the 
Chanalyst  very  useful  checking  intermediate 
frequency  and  in  finding  troubles  which  would 
have  been  hard  to  find  otherwise,  such  as  inter- 
mediate transformers  that  show  resistance  on 
the  Ohmmeter  but  are  still  bad." — Emmet  Helm, 
"I  have  been  in  service  work 
ll2  years  and  bought  a  lot  of 
test  instruments.  The  Chanalyst 
is  the  best  I  ever  bought.  For  intermittens  and 
distortion  it  has  cut  my  service  time  90%,  and 
for  coupling  condensers,  you  can  test  them 
quicker  than  you  can  pick  up  a  soldering  iron." 
— Carl  B.   Williams,   Radio  Service  Laboratory. 


"I  now  End  it  indispensable 
.  .  .  The  Chanalyst  enables  you 
to  actually  travel  through  a 
receiver,  everything  seems  to  open  up  before 
you." — Residential  Radio  Sales  and  Service. 

"The  Watt  Indicator  in  the 
Chanalyst,  alone,  saved  me  a 
lot  of  trouble  and  time  on  three 
sets  where  the  power  transformer  had  been 
subjected  to  a  heavy  overload  and  was  burnt 
bad.  The  Chanalyst  takes  all  the  GUESS  WORK 
out   of  servicing." — E.  M.   Little. 

"The  Chanalyst  has  changed 
headache  jobs  into  a  pleasure1. 
The    one    we    have    has    been 

busy  almost  continually  since  we  bought  it." — 

Arndt's  Radio  Service. 


fij^5S9 


SERVICE  INSTRUMENTS,  Inc. 

404  Fourth  Ave.,  New  York  City 


THi  FASTEST  METHOD  Of  TROUBLESHOOTING 

HmH Take Our\ 
Word  For  It . 


GET  A 
DEMONSTRATION! 


November,  1938 


47 


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Checks  all  receiving  tubes.  (No  ballast  test.)  Tester 
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fame  as  for  Model  432. 


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FACING  FURNITURE  FACTS 

(From  page  16) 

A  lot  of  helpful  material  can  also 
be  obtained  from  the  radio  manufac- 
turers who  specialize  in  period  style 
cabinets.  To  an  outfit,  they  are  in- 
terested in  telling  the  radio  man 
what  he  needs  to  know  about  this 
kind  of  selling. 

Then  too,  it  is  a  good  idea  to  talk 
to  furniture  salesmen.  These  chaps 
have  made  it  their  life  business  "to 
understand  and  to  dramatize  the 
qualities  of  period  furniture"  and 
have  advice  to  give  which  is  far  more 
practical  than  material  gotten  from 
formal  records.  Radio  buyers,  as 
well  as  radio  salesmen,  will  find  this 
profitable. 

Do  you  know  your  woods? 

Part  of  the  "furniture  radio"  sales 
technique  is  to  know  your  way  around 
among  woods,  figures,  and  finishes. 

For  instance,  most  dealers  know 
mahogany  when  they  see  it  (although 
it  is  not  a  "red"  wood)  but  not  all  of 
them  know  that  it  comes  in  striped, 
swirl  or  crotch  figures.  To  have  this 
information  about  each  wood,  and  to 
know  the  figures  when  you  see  them, 
is  a  great  asset  to  the  radio  salesmen. 
Some  figures  are  very  rare  and  ex- 
pensive— you  may  not  be  able  to  get 
exceptionally  high  prices  unless  you 
know  exactly  why  the  patterns  are 
special  and  costly. 

About  each  wood  are  chiefly  three 
things  to  know  (1)  its  figure  (2) 
where  it  comes  from  (3)  what  design 
it  is  mainly  identified  with. 

For  instance,  crotch  walnut  is  pro- 
duced domestically,  and  is  widely  used 
in  Queen  Anne  pieces. 

Merchandising  style 

Once  the  dealer  has  become  profit- 
ably interested  in  this  branch  of  the 
radio  business,  several  changes  will 
be  appropriate  in  his  store.  To  begin 
with,   most   dealers   find  it  smart   to 


display  a  period  cabinet  separately, 
rather  that  crowded  in  amongst  a  se- 
ries of  standard  models.  When  prac- 
tical, right  style  rugs  and  furnishings 
■  accompany  them. 

A  handsome  lamp  on  a  nearby  table 
will  help  the  display,  and  some  dec- 
orative knick-knacks  will  add  greatly 
to  the  effect.  Further,  period  models 
should  be  displayed  where  there  is 
not  too  much  outdoor  light  coming 
in,  as  it  detracts  from  bringing  out 
the  fine  characteristics  of  the  woods 
and  finishes.  It  is  for  this  reason 
that  most  furniture  departments  have 
the  shades  drawn  when  displaying  fine 
furniture. 


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48 


Radio  Today 


INTERNATIONAL  ANSWERS  FTC 

The  International  Radio  Corpora- 
tion, Ann  Arbor,  Mich.,  reports  that 
it  welcomed  the  filing  of  the  recent 
complaint  issued  by  the  Federal 
Trade  Commission  against  the  com- 
pany and  has  filed  answer  thereto. 
International  feels  that  this  is  a 
necessary  step  in  bringing  about  a 
correction  of  at  least  one  of  the  evils 
that  has  been  prevalent  in  the  radio 
industry  for  some  years  past.  For  a 
long  time  it  has  been  felt  that  too 
much  emphasis  was  being  placed 
upon  the  number  of  tubes  in  a  radio 
without  regard  to  their  functions, 
efficiency  or  necessity.  "Most  every- 
one was  guilty  to  a  greater  or  lesser 
degree  and  the  International  Radio 
Corporation  felt  that  only  by  carry- 
ing this  matter  to  a  somewhat  ex- 
treme point  could  the  situation  be 
clarified.  This  was  done  in  the  sum- 
mer of  1937  and  it  is  apparent  that 
the  results  hoped  for  are  being 
achieved  and  that  receiving  sets  in 
the  future  will  be  advertised  more 
honestly  than  they  have  been  for 
several  years  past." 

WIRELESS  RECORD  PLAYERS 
OPEN  NEW  FIELDS  FOR  DEALERS 

Since  the  recent  introduction  of  the 
new-style  record  player  which  has  no 
wire  connection  with  the  radio  set, 
dealers  are  waking  up  to  the  fact  that 
all  radio  buyers,  old  and  new,  are  pros- 
pects for  this  new  merchandise.  For 
Radio  Today,  Bob  Howard,  who  is  the 
divisional  sales  manager  for  Sonora 
Electric  Phonograph  Co.,  Inc.,  New 
York  City,  has  listed  some  sales  meth- 
ods to  use  on  the  new  instruments. 

Exceptionally  dramatic  demonstra- 
tions can  be  staged  with  the  players, 
right  in  the  home  of  the  prospect,  if 
service  men  will  take  along  a  portable 
model  when  they  make  repair  calls. 
The  "wireless"  features,  when  properly 
shown  off,  are  easy  to  sell. 

Also,  some  dealers  are  having  good 
success  by  selling  the  players  in  com- 
bination with  old  radio  models  which 
are  hard  to  move.  In  this  way  the  re- 
tailer is  able  to  offer  what  is  really  a 
phono-radio  combination,  at  a  very  at- 
tractive figure. 

All  this  fits  in  very  well,  Mr.  Howard 
reminds  us,  with  the  new  interest  on 
the  part  of  the  public  in  records  of  all 
types.  To  develop  this  market,  the 
Sonora  firm  now  has  a  complete  line  of 
players,  including  those  appropriate 
for  dance  fans,  music  lovers,  college 
students,  and  those  who  require  a 
portable  model. 

Sonora  Radio  d  Television  Corp., 
Chicago,  has  purchased  the  Ferguson 
Radio  d  Television  Corp.  of  New  York. 
According  to  Sonora  president  Joe 
Gerl,  this  is  another  of  the  steps  in 
current  expansion  plans  of  his  com- 
pany; more  of  them  will  be  announced 
soon.  Manufacturing  facilities,  as  well 
as  sales  organizations,  are  being  en- 
larged and  modernized  in  line  with  the 
recent  growth  of  the  firm. 

Mr.  Gerl  has  also  announced  the  pur- 
chase by  Sonora  of  all  the  physical 
assets  of  Clinton  Mfg.  Co.,  Chicago. 
Consolidation  of  all  the  new  properties 
of  Sonora  is  under  way. 

November,  1938 


ago**  **>* 

FACTOR  UH6 


°%ur 


x?iS!S 


The  type  BR  "Blue  Beaver"  is  a  typical 
example  of  the  C-D  "experience-tested 
and  quality  built"  capacitor  line.  Her- 
metically sealed  and  vented,  they 
eliminate  drilling  of  chassis,  use  of  pal 
nuts  and  washers  as  well  as  minimize 
assembly  operations.  You'll  like  the 
results  you  get  from  C-D's  NEW  Blue 
Beavers. 


Type  TJU  fireproof  Dykanol  transmitting  ca- 
pacitors come  hermetically  sealed  in  sturdy 
steel  containers.  These  are  the  capacitors 
practically  every  broadcast  and  government 
station  in  the  world  uses  today.  Standard 
equipment  too,  with  tens  of  thousands  of 
"hams"  who  will  buy  nothing  else  but  C-D 
Dykanol  units. 


CATALOG  NO.  161 
NOW  OFF  THE 

PRESS!  Have  You 
Enough  Copies? 


C-D  famous  "Dwarf-Tiger"  paper  tubu- 
lar capacitors  are  non  -  inductively 
wound  and  specially  sealed.  Extensively 
used  by  leading  set  manufacturers, 
C-D  has  produced  many  hundreds  of 
millions  of  these  tubulars — more  than 
any  other  company  in  the  world.  Type 
DT  is  a  real  quality  capacitor  at  the 
lowest  price  ever  offered. 


J&W  ELECTRIC    CORPORATION 

1022    Hamilton  Boulevard,   South  Plainlield,  Ne*r  Jersey 


49 


HELP  ON  TUBE  SALES 

(From  page  33) 

"All  are  available  through  regu- 
lar G-E  radio  tube  distributors  who 
are  making  attractive  offers  on  this 
equipment  in  conjunction  with  the 
purchase  of  G-E  pre-tested  tubes." 

High  professional  standards 

National  Union  Radio  Corp.  ex- 
plains what  it  has  undertaken: 

"Our  approach  to  the  problem  of 
increasing  retail  sales  of  radio  tubes 
is  indirect.  We  hold  to  the  theory 
that  a  large  percentage  of  the  total 
volume  of  tubes  sold  go  through  the 
channels  of  the  radio  service  pro- 
fession and,  therefore,  that  any  sell- 


ing activity  which  directly  promotes 
or  increases  the  facilities  of  this  pro- 
fession is  bound  to  lead  to  increased 
tube  volume. 

"We  have  directly  approached  the 
ideal  of  helping  the  serviceman  build 
himself  in  the  confidence  of  the  pub- 
lic by  enabling  him  to  obtain  the 
finest  of  modern  set  and  tube  test- 
ing instruments.  It  is  obvious  that 
the  well-equipped  service  engineer 
creates  confidence  among  his  cus- 
tomers and  is  in  position  to  service 
more  sets  in  a  shorter  period  of  time. 
An  increase  in  tube  volume  follows, 
naturally. 

"Other  items  which  make  for  bet- 
ter business  efficiency  in  the  service 
profession  and  which  we  give  on  a 
premium    basis    include    typewriters, 


magnet  and  e»  proll,  p  oscd 


„_„  ox  iouw 


Jt 


CINAUDAGRAPH    CORPORATION 

STAMFORD,  CONNECTICUT 


Mlllllllllllllllllllilllllllllllllllllllllllllllllllllllllllllllllllllllllllll ' ' 


EVERYTHING  IN  RADID 


A  COMPLETE  SOURCE  FOR  YOUR  RADIO  NEEDS! 

Our  immense  stock  of  radio  sets,  parts  and  sup- 
plies enables  you  to  purchase  your  entire  needs  on 
one  order.  The  Big  BA  catalog  is  an  encyclopedia 
of  the  Radio  Industry.  You  will  find  all  your  Nat- 
ionally Known  Favorites  shown  in  this  Book  and 
it's  FREE  for  the  asking.  BA  service  is  better  than 
ever— practically  every  order  is  shipped  the  same 
day  it   is   received. 

Write  for  Big  New  Wholesale  Catalog 


BURSTEINHPPLEBEE  CO. 


1012-14  McGEE  STREET 

Kansas  City,  Missouri 


shop  coats,  watches,  stationery  kits, 
electric  clocks,  semi-permanent  signs 
for  indoor  and  outdoor  use,  service 
manuals  and  advanced  radio  service 
study  courses. 

"This  season  we  have  a  greater  se- 
lection of  radio  service  necessities 
than  ever  before  and  it  is  our  sin- 
cere hope  that  these  things  will 
point  the  way  to  a  bigger,  more 
profitable  radio  service  profession 
with  resultant  increase  in  retail  tube 
sales  volume." 

Door  openers 

Here  is  the  progress  at  Tung  Sol: 

"Our  most  successful  door  opener, 
the  'Tung-Sol  Program  Reminder,' 
was  released  during  the  month  of 
September,  1938.  It  coincides  with 
our  usual  plan  of  cooperative  adver- 
tising and  if  properly  used  supplies 
the  dealer  with  a  prospect  list  as 
well  as  an  opportunity  to  solicit  new 
business.  Complete  instructions  are 
printed  on  the  back  tear-off  card  of 
each  book. 

"The  Renaissance  design  on  the 
cover  printed  in  gold  and  purple 
provide  both  eye  appeal  and  reten- 
tion value — every  set  owner  will 
want  it  and — more  important — it 
will  be  kept  near  the  radio.  The  ser- 
viceman's name  and  phone  number  is 
imprinted  on  the  front  cover. 

"Constant  releases  of  new  adver- 
tising items,  including  window  dis- 
plays, cloth  banners,  metal  signs, 
stationery,  etc.,  has  supplied  Tung- 
Sol  dealers  with  personalized  mate- 
rial that  has  enabled  them  to  pro- 
mote their  own  business  and  helped 
them  acquire  good-will  and  recogni- 
tion in  their  own  community." 

How  other  tube  manufacturers  fig- 
ure in  the  big  campaign  on  more  re- 
placement sales,  will  be  reported  ia 
later  issues  of  Radio  Today. 

N.  Y,  RSA  TO  SPONSOR 
GHANALYST  DEMONSTRATION 
DEC.  12 

The  Metropolitan  N.  Y.  chapter  of 
the  Radio  Servicemen  of  America 
have  announced  that  on  Monday  eve- 
ning, Dec.  12,  at  8  P.M.,  John  Rider 
in  person  will  give  a  complete  ex- 
planation of  the  useful  application 
of  the  Chanalyst  in   radio   servicing. 

A  number  of  the  instruments  will 
be  in  actual  operation,  each  locating 
a  different  circuit  defect. 

Meeting  will  be  held  at  the  Hotel 
Capitol  at  51st  St.  and  8th  Ave., 
New  York  City.  An  invitation  is  ex- 
tended to  all  radiomen  to  attend  this 
free  meeting. 

GE  MARKS  60TH  YEAR 

When  the  General  Electric  Co.  was 
60  years  old  last  month,  the  Sche- 
nectady, N.  Y.,  Chamber  of  Com- 
merce tossed  a  big  dinner  to  honor 
the  company  and  its  accomplish- 
ments. Chamber  President  L.  G. 
Magner  presented  a  bronze  plaque  to 
GE  President  Gerard  Swope;  others 
on  the  program  were  Public  Service 
Commissioner  G.  R.  Lunn  and  GE 
Vice-president  Charles  E.  Wilson. 
During  the  ceremony,  three  veteran 
employees  of  the  firm,  with  50  or 
more  years  of  active  service,  received 
special  honor. 


50 


Radio  Today 


LEADING  DISTRIBUTORS 

G4UX. 

EXPERT  SERVICE  MEN 

Ate  All  StefLfUMXf 
*7a  tlUi  Popular 

TUNE: 


What  about  those 

SMALL  CONDENSERS  ? 


TO  ALL  who  have  written  to  ask  us 
"What  about  those  new  midget  dry 
electrolytics  so  many  manufacturers  are 
talking  about?" — we  are  glad  to  make 
this  statement: 

Sprague  Atoms  are  beyond  question 
the  finest  condensers  yet  produced  in 
small  size.  We  recommend  them  un- 
reservedly for  all  ordinary  replace- 
ments —  especially  where  space  is 
limited  or  where  you  need  a  really 
reliable  condenser  at  a  rock-bottom 
price.  ATOMS  will  save  you  time, 
money  and  space.  They  will  not  let 
you  down. 

But  do  not  confuse  Sprague  ATOMS 
with  ordinary  small  dry  electrolytics. 
For  years,  Sprague  has  led  the  way 
toward  making  better  condensers  in 
smaller  sizes.  ATOMS  represent  the 
ultimate  of  all  that  Sprague  leadership 
in  this   direction  represents. 

ATOMS  are  made  by  an  exclusive  etched 
foil  process,  pioneered  and  perfected  by 
Sprague.  "Blowouts"  are  positively  pre- 
vented by  a  Sprague  design  feature  that 
other  manufacturers  are  only  just  now  be- 
ginning to  copy.  Extremely  low  leakage 
avoids  overheating.  Quick  build-up  and 
high  surge  voltage  make  them  practically 
foolproof.  They  are  made  in  both  singles 
and  dual  combinations  covering  every  re- 
placement need.  They  are.  in  brief,  truly 
universal — a  modern  Sprague  develop- 
ment that  every  wide-awake  radio  man 
ought  to  know  about — and  use  regularly. 


SPRAGUE 

GOOD  CONDENSERS-EXPERTLY  ENGINEERED- 
COMPETENTLY  PRODUCED 


SPRAGUE     PRODUCTS     CO.,    NORTH    ADAMS,    MASS. 


November,  1938 


51 


FLASH ! 


REGARDLESS  of  your  present  radio 

line — Wilcox-Gay  offers  you  opportunities  for  un- 
usual profits  during  the  coming  Christmas  season 
with  the  following   new  and  novel  creations: 

1.  The  ORIGINAL  wireless  record   player. 

2.  The  versatile  "Thin   Man"  radio. 

3.  Beautiful  all  walnut  console  at  $59.95. 

4.  The  convertible  Wal-chairside  model. 

5.  An  unusual  push-pull  table  set  at  $36.95. 

6.  New  performance  in  a  compact  battery  job. 

The  wireless  feature  of  the  Wilcox-Gay  record 
player  is  the  only  practical  solution  far  playing 
records  through  any  radio.  Since  June  1st,  thou- 
sands of  profitable  retail  sales  have  been  made 
by  Wilcox-Gray  dealers. 

The  sensational  success  of  the  Wilcox-Gay  wireless 
record  player  has  brought  forth  players  of  similar 
design.  We  are  complimented,  of  course.  However, 
the  Wilcox-Gay  player  is  known  to  be  good  by 
tens  of  thousands  of  successful  sales.  Wilcox-Gay 
offers  you  a  $19.95  retail  price  and  a  generous 
discount;  also,  remember  Wilcox-Gay  uncovered  this 
gold  mine  of  extra  business  for  the  radio  industry. 

Write  today  for  our  free  1939  catalog  which 
shows  why  Wilcox-Gay  can  make  your  radio 
business  more  profitable.    Address  Dept.   D-S. 

WILCOX-GAY  CORPORATION 

CHARLOTTE,  MICHIGAN,  U.  S.  A. 


•    •    • 


•    •    • 


MODEL, 

RC  6 


LOOKING  FOR  CLUES? 

"Garrard"  is  the  clue  to  in- 
creased sales  for  YOU.  Have 
"Garrard"  Automatic  Record 
Changers  built  into  the  phono- 
radios  you  carry  (leading  manu- 
facturers use  them  on  request)  or 
feature  "Garrard"  units  for 
custom  assemblies  and  modern- 
ization jobs.  Cash  in  on  the 
demand  for  quality  record  play- 
ing equipment.  Push  "Garrard" 
for  the  answer  to  your  sales 
"mystery."  Write  for  FREE  cat- 
alog No.  53L. 

GARRARD  SALES  CORP.  17  WARREN  ST,  NEW  YORK,  N.Y. 


SUCCESS  ON  PLATTERS 


California  dealer  describes  thriving  record  business 


The  profitable  way  in  which  the 
merchandising  of  phonograph-radios 
combines  with  the  successful  promo- 
tion of  records  is  neatly  illustrated  by 
what  is  going  on  at  the  Birkel-Rich- 
ardson  Co,  Los  Angeles,  "The  House 
of  Music." 

Manager  J.  C.  Bates  of  the  phono- 
graph-radio department  has  outlined 
the  store  activity  for  Radio  Today  : 
"We  have  maintained  our  record  de- 
partment for  the  .past  twenty-five 
years.  Though  at  times  it  was  ope- 
rated at  a  loss,  the  loss  was  made  up 
in  the  sale  of  phonograph  combina- 
tions. We  have  found  that  nothing 
sells  an  expensive  machine  better  than 
the  fact  that  a  purchaser  can  obtain 
recordings  in  album  form  of  complete 
operas ;  can  play  from  six  to  twenty 
records  continuously  depending  upon 
the  model  of  the  combination;  and 
can  have  their  choice  of  the  world's 
finest  music  whenever  they  want  it. 
Not  only  can  they  have  the  music 
they  want  when  they  want  it,  but  they 
can  have  an  improved  music  made 
possible  with  electrical  amplification 
and  tone  control  that  will  reproduce 
the  finest  symphonic  music  to  a  per- 
fection. Such  a  selling  point  as  that 
is  hard  to  beat  as  the  sales  volume 
mounts  higher  to  prove  it'.  One 
helps  the  other  and  we  seldom  place  a 
large  combination  without  it  being 
accompanied  with  a  substantial  order 
of  recordings. 

No  mixed  music 

"In  demonstrating  the  machine 
care  must  be  taken  to  give  the  pros- 
pect the  proper  selection  of  record- 
ings, for  many  sales  have  been  made 
or  lost  in  just  that  manner.  We  have 
our  salesmen  stick  to  classical  selec- 
tions throughout  or  to  use  all  popular 
music,  and  never  at  any  time  inter- 
mix the  two  unless  requested  to  by  the 
customer,  for  we  have  found  that  if 
we  can  give  the  customers  the  music 
that  especially  appeals  to  them  we 
have  gone  a  long  way  in  making  a 
sale. 

"Whenever  a  customer  comes  in  for 
a  recording  we  obtain  if  possible  their 
name  and  address.  This  gives  us  a 
large  mailing  list  and  we  continuously 
send  letters  and  catalogs,  then  follow 
up  with  personal  calls.  It  also  affords 
us  an  opportunity  while  they  are  in 
the  store  to  demonstrate  to  them  the 


MERRY  CHRISTMAS  VIA  RECORDS 


A  RECORDED 
MESSAGE^ 
FROM     Xn&, 


*Jf   «„.>  ,/">■/ 


A  Christmas  stunt  for  dealers  to  get 
behind — selling  customers  the  idea  that 
they  should  use  recorded  Xmas  greet- 
ings. This  is  Presto's  6"  greeting  rec- 
ord, all  ready  to  mail. 


superiority  of  the  latest  models  and 
to  compare  them  to  the  ones  they  now 
have.  Many  home  demonstrations  are 
arranged  in  that  manner  and  when 
the  new  machine  is  played  in  com- 
parison to  the  old  model  a  sale  is 
practically  assured. 

THESE  ARE  DISC  DAYS 


New  table  for  any  of  the  new  record 

players.    Top  is  20  x  15.    Schloss  Bros. 

supplies   either   walnut   or   mahogany; 

room  for  120  discs.    List  $7. 


52 


Radio  Today 


"Another  variation  that  we  follow 
in  our  department  is  the  asking  for 
suggestions  before  buying  our  stock. 
We  get  a  variety  of  opinions  on  the 
salesman's  prospects  and  are  able  to 
base  the  individual  quota  accord- 
ingly." 

Birkel  Richardson  Co.  sells  every- 
thing from  phonograph  needles  to 
pipe  organs,  and  all  departments  co- 
operate in  an  exchange  of  leads.  The 
firm  also  makes  a  specialty  of  loaning 
instruments  to  movie  studios,  and 
making  contacts  with  movie  stars. 
"Our  list  of  satisfied  customers  and 
prospects  resembles  a  guide  book  to 
the  homes  of  the  stars,"  says  Mr. 
Bates.  "With  their  autograph  on  the 
delivery  ticket,  each  one  is  a  selling 
point  to  use   on  the  next  customer." 

WAX  WORTH  WATCHING 

BUNNY  BERIGAN  and  his  orchestra  plaving  Father 
Dear  Father,  with  VE  by  Bernie  Mackey  and  Let  This 
Be  a  Warning  to  You.  Baby,  with  VR  by  Jayne 
Dover — Victor  26061. 

EDDY  DUCHIN  and  his  orchestra  playing  Heart  and 
Soul  and  It's  a  Lonely  Trail,  both  with  VC  by  Stan- 
ley Worth — Brunswick   S238. 

AL  DONAHUE  and  his  orchestra  playing  What  Do 
You  Know  About  Love  and  What  Have  You  Got  That 
Gets  Me,  from  "Artists  and  Models  Abroad,"  both 
with  VC  by  Paula  Kelly — Vocalion  4420. 


PAUL  WHITEMAN  and  his  orchestra  playing 
There's  No  Place  Like  Your  Arms,  with  VC  by  Mod- 
ernaires,  and  When  I  Go  a  Dreamin',  with  VC  by 
Joan  Edwards — Decca   2076. 


KAY  KYSER  and  his  orchestra  playing  Two  Sleepy 
People  from  "Thanks  for  the  Memory,"  with  VC  by 
Ginny  Simms  and  Harry  Babbitt,  and  Have  You  For- 
gotten So  Soon,  with  VC  by  Ginny  Simms — Brunswick 
S244. 


RAY  NOBLE  and  his  orchestra  playing  Cherokee 
and  By  the  Waters  of  the  Minnetonka,  with  VC  by 
Howard    Phillips — Brunswick    8247. 

RUSS  MORGAN  and  his  orchestra  playing  Summer 
Souvenirs  with  VC  by  Morgan,  and  Is  That  the  Way 
to  Treat  a  Sweetheart,  with  VC  by  Mert  Curtis — 
Decca    2053. 


ELLA  LOGAN,  with  Perry  Botkin  and  his  orchestra, 
singing  Come  to  the  Fair,  and  Ragtime  Cowboy  Joe — 
Brunswick  8232. 


CAB  CALLOWAY  and  his  orchestra  playing  The 
Congo  Conga  and  There's  a  Sunny  Side  to  Everything, 
both  with   VC   by   Calloway-— Vocalion   4411. 

EDDIE  DELANGE  and  his  orchestra  playing  Button 
Button  and  Jump  Jump's  Here,  both  with  VR  by 
Elisse  Cooper  and  chorus — Bluebird  B7837. 

TOMMY  DORSEY  and  his  Clambake  Seven  playing 
You  Must  Have  Been  a  Beautiful  Baby,  from  the 
Warner  Bros,  film  "Hard  to  Get,"  and  Sailing  at 
Midnight,  both  with  VR  by  Edythe  Wright — Vic- 
tor 26066. 

EDDIE  DELANGE  and  his  orchestra  playing  What 
Are  Little  Girls  Made  Of,  with  VR  by  Elisse  Cooper 
and  chorus,  and  New  Shoes  Blues — Bluebird  B7855. 

ANDREWS  SISTERS  singing  Goodbye  Goodbye  and 
Lullaby  to  a  Jitterbug — Decca  2082. 

BLUE  BARRON  playing  Heart  and  Soul,  with  VR 
by  Russ  Carlyle,  and  Love  Doesn't  Grow  on  Trees, 
with  VR  by  Charlie  Fischer,  both  from  the  Para- 
mount film   "A  Song  Is  Born" — Bluebird  B7872. 

HIL0  HAWAIIAN  orchestra  playing  That  Night  in 
Avalon  and  Colorado  Sunset,  with  VR  by  Jimmy  Ray 
—Bluebird  B7749. 

HAL  KEMP  and  his  orchestra  playing  Bambina,  with 
VR  by  Bob  Allen,  and  Monday  Morning,  with  VR  by 
Judy  Starr — Victor  26031. 


YOU  CAN  GET  NEW  SHOP 
EQUIPMENT  FREE  WITH 
YOUR    PURCHASES    OF 

NATIONAL  UNION 

RADIO  TUBES  and  CONDENSERS 

Thousands  of  <-§£ 

Aggressive    Service    Engineers    Make    More 
Money  by  getting  instruments  the  N.  U.  way 

•  Radio  owners  will  naturally  turn  to 
the  service  engineer  who  builds  him- 
self a  reputation  for  having;  the  latest 
things  in  test  equipment  so  that  he 
can  service  radios  quickly,  and  do  a 
100%   satisfactory  job. 

Remember  on  the  National  Union 
plan  you  don't  have  to  put  up  the 
amount  of  money  which  would  nor- 
mally be  required  if  you  were  to  go 
out  and  buy  the  modern  equipment 
you  want.  Through  National  Union 
you  earn  the  equipment  through 
every  day  purchases  of  National  Union 
Radio  tubes  and  condensers. 


Here's  all  you  do: 

1.  Select   the  equipment  you  want. 

2.  Sign  a  National  Union  tube  and/or 
condenser    purchasing    agreement. 

3.  Place  a  small  deposit  which  will  be 
refunded  to  you  as  a  merchandise 
credit  when  your  purchasing  agree- 
ment   is    completed. 

4.  Order  a  small  quantity  of  National 
Union  tubes  and/or  condensers  at 
the  time   you  sign   the   agreement. 

5.  Apply  your  regular  monthly  pur- 
chases of  tubes  and  condensers 
against  the  requirements  of  the 
contract. 


SEE  THE  BIG  102  PAGE  MANUAL  AT  YOUR  JOBBER 

Step  Up!     Equip  Yourself 

for  More  Business 

the  NATIONAL  UNION  way 

WRITE  FOR  DETAILS 

AND 

NAME  OF  NEAREST  DISTRIBUTOR 

NATIONAL  UNION  RADIO  CORP. 

NEWARK,  N.  J. 


Unidirectional    Dynamic    D-9-T 


BACK  No  Pickup 

FRONT    Pull    Coverage 

VOLUME  INCREASED 
by   Reducing   Feedback 

D9T,  List  $37.50,  High  Imp.  2  5'  Cable 
D9,  List  $35.00,   Low  Imp.  25'  Cable 

Write  for  Catalogue  No.  29 

Manufacturers    Full    Line    Dynamic,    Crystal    and 
Carbon    Microphones    and    Stands 


AMERICAN    MICROPHONE    CO.,    Inc. 


1915  So.  Western  Ave. 


Los  Angeles,  Calif. 


November,  1938 


53 


REP4 


•  Do  yourself  a  good  turn  .  .  . 
and  let  that  good  old  scout, 
"Old  Man  Centralab,"  help 
you  with  his  ADASHAFT  kit 
.  .  .  housed  in  a  swell  metal 
box,  hinged,  contains  ten 
Midget  Radiohms,  five  types 
of  attachable  shafts,  etc. 

This  kit  will  enable  you  to  do 
some  mighty  fine  "deeds"  for 
more  than  400  different  makes 
of  receivers  .  .  .  actually  thou- 
sands of  different  models.  See 
your  jobber. 


Included  in  the 

ADASHAFT  KIT 

are  the  following :  10  Adashaft 
controls,  5  Midget  Switch 
covers,  6  4-inch  Adashafts,  1 
10-inch  Adashaft,  2  3-inch 
Auto  type  Adashafts,  1  6-inch 
Auto  type  Adashaft,  2  slotted 
Insacups,  2  square  hole  Insa- 
cups,  1  300  ohm  Bias  Resis- 
tor. 5  Ground  Straps,  10  "C" 
Washers,  5  Switch  Insulators, 
and  10  Terminal  Insulators. 
...    1    Instruction   form   648. 


Centralab 

Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 

BRITISH    CENTRALAB,    LTD. 
Canterbury    Rd.(    Kilburn 
London   N.W.   6,   England 

FRENCH    CENTRALAB    CO. 
IIS    Avenue    Ledru-Rollin  Paris    XI,    France 


TELEVISION  NEXT  SPRING 

(From   page  17) 

Besides  these  transmitters  there  are 
18  other  stations  licensed  for  experi- 
mental television  in  various  parts  of 
the  U.  S.  One  of  these  is  W6XAO, 
the  Los  Angeles  station  of  the  Don 
Lee  Broadcasting  System,  which  re- 
cently sold  the  Harry  B.  Lubcke  pat- 
ent rights  to  BOA. 

An  example  of  prompt  action  on 
the  part  of  independent  broadcast  sta- 
tions came  from  station  WTMJ,  Mil- 
waukee, which  announced  that  "we 
have  filed  with  TCC  the  first  appli- 
cation for  a  license  to  operate  a  tele- 
vision station  for  the  purpose  of 
transmitting  a  regular  schedule  of 
programs." 

To  all  stations,  BOA  has  made 
available  a  not-too-expensive  televi- 
sion transmitter,  1KW,  the  first  me- 
dium powered  one  to  be  announced 
"to  render  a  satisfactory  service  over 
a  reasonable  area." 

In  New  York,  the  American  Tele- 
vision Corp.  announced  a  special  de- 
vice designed  for  department  stores. 
It  gives  the  manager  of  one  depart- 
ment a  chance  to  parade,  via  televi- 
sion, the  merchandise  being  offered 
for  sale  in  other  departments. 

Word  of  caution 

Commander  E.  F.  McDonald,  Jr., 
Zenith  president,  declared  that  the 
radio  industry  should  not  ask  the 
public  to  pay  for  its  experimentation 
in  television,  at  least  not  without  let- 
ting the  public  know  that  costly  re- 
placements and  changes  may  be  nec- 
essary. Commander  McDonald's  view 
is  that  "the  offering  for  sale  of  tele- 
vision receivers  at  this  time  in  view 
of  the  present  state  of  the  art  is  un- 
fair to  the  public  and  premature  both 
for  economic  and  technical  reasons." 

Zenith    operates    the    experimental 


station  W9XZV  in  the  Chicago  area, 
and  will  have  television  receivers 
ready,  but  has  no  intention  of  selling 
them  to  public  at  this  time. 

Commander  McDonald  further  ex- 
plains his  stand : 

"Television  holds  the  most  fascinat- 
ing possibilities  ever  envisioned  by 
an  eager  public  but  I  cannot  agree 
that  television  receivers  are  ready  for 
mass  production  and  country-wide 
distribution  on  any  such  basis  as  even 
the  first  radio  broadcast  sets  that 
were  distributed  in  the  early  twenties. 

"Television  is  essentially  different 
from  anything  with  which  we  have 
had  to  deal  in  the  past.  The  first 
automobiles  constructed  and  sold  to 
the  public,  unless  they  have  heen 
worn  out  from  use,  will  still  operate 
on  our  highways  today,  and  with  the 
gasoline  now  used.  Likewise,  the  first 
radio  broadcast  receivers  constructed 
and  sold  to  the  public  will  still  op- 
erate and  reproduce  programs  broad- 
cast from  the  most  modern  broad- 
casting stations  of  today.  On  the 
other  hand,  the  television  receiving- 
set  of  one  year  ago  is  already  obso- 
lete and  cannot  be  operated  in  the 
home  with  the  latest  television  trans- 
mitter of  today. 

"What  the  public  should  know,  and 
has  not  been  told,  about  television  is 
that  the  receivers  must  be  matched 
to,  synchronized  with  and  built  on 
the  same  standards  as  the  transmit- 
ters. Any  major  change  made  in  the 
television  transmitter  will  necessi- 
tate a  change  in  the  receiver.  This, 
of  course,  is  not  true  of  radio  re- 
ceiving sets.  It  is  not  only  conceiv- 
able, but  quite  possible,  that  within 
a  year  from  today  the  standards  of 
the  television  transmitter,  which,  in- 
cidentally, have  not  yet  been  officially 
adopted,  may  again  be  changed,  and 
this,  in  turn,  will  once  again  make 
obsolete  all  television  receivers  man- 
ufactured and  sold  today." 


Jai\e£te/  JLotaru  Converters 


FOR  CONVERTING  D.C.  TO*il.C. 

•  Built  especially  for  radio  and  sound  apparatus — cap- 
acities 110  to  3250  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service 
— used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus  throughout  the  world  © 
WHY  EXPERIMENT  —  INSIST  ON  R  JflNETTE 

ASK   FOR    BULLETIN  13-1 


Janette  ttlaiuifaciuwiuj  Company 

556-558  TUestltlonwe  Stceet  CKicaocr,  IH.XL.S.J1. 


54 


Radio  Today 


-  AMERICAN 
CONDENSERS 

ALL  STANDARD  TYPES 
BY-PASS  &  ELECTROLITIC 

A  perfected  product  of  laboratory  research, 
competent  engineeringand  precision  manufac- 
turing methods.  Long  life,  stamina  and  depend- 
ability make  them   ideal  replacement  units. 


AMERICAN    CONDENSER   CORP. 


2508  So.  Michigan  Ave. 


Chicago,  111. 


J 


RADIO    DEALERS    ORE 

f  ijn  d  i  n  g  n  A/*w  source 

OF    PROFIT    IR 


*T 


IVA 


*e 


At  Last . . . 


It's  here !  The  sensational  Home 
Radiothermy  machine  that  is 
sweeping  the  country !  Sells  like 
hotcakes.  Every  home  a  pros- 
pect. Supreme  Model  illustrated 
lists  at  $149.50  with  a  big  pro- 
tected  profit  to  you.  Most  good 
jobbers  have  at  least  one  in  stock 
for  demonstration  purposes.  If 
he  cannot  supply  you  .  .  .  write 
us  at  once  giving  his  name  and 
address. 

Don't  wait  for  Television  to 
boost  your  profits  .  .  .  Radio- 
thermy IS  HERE  .  .  .  N-O-W! 
Address  Dept.  RT-11. 

Attractive  Territories 
Open  For  Uistributors 


SCIENTIFIC    DIATHERMY    CORP. 

200    WEST    34th    STREET    •    NEW    YORK,    N.    Y. 


November,  1938 


^Tlf 


Is  niine  a  representative  serviee 
business? 

Is  lny  location  free  from  interference 
with  already  established  Tung-Sol  agents? 

Can  I  nia t ch  my  competition  in  tech- 
nical knowledge  and  service  equipment? 

Can  I  turn  over  my  tube  stock  at 
least  every  three  or  four  months? 

Are  my  facilities  adequate  to  make 
use  of  attractive  displays? 

Have  I  a  reputation  for  maintaining 
standard  prices? 

Can  I  be  depended  on  to  make 
monthly  reports  of  consigned  stock  with 
remittance  for  tubes  already  sold? 

Dealers  who  can  answer  "yes"  qualify  under 
the  Tung-Sol  Consignment  Plan.  This  means 
an  adequate  supply  of  world  famous  Tung- 
Sol  Tubes  without  investment.  If  you  think 
you  qualify,  write  for  details. 


TUNG-SOL 


TUNG-SOL    LAMP    WORKS,    Inc.     • 

SALES  OFFICES:     ATLANTA   •    CHICAGO    ' 
KANSAS  CITY   •    LOS  ANGELES    •   NEW  YORK 


Dept.  C 


Radio  Tube  Division 
DENVER    •    DETROIT 


DALLAS 

GENERAL  OFFICES,  NEWARK,  N.J 


55 


Vice-president  Howard  Briggs  of 
Hoicard  Radio  Co.,  has  made  an  exten- 
sive trip  south  and  has  a  report  on 
sales  conditions  there:  "business  is 
definitely  on  the  upgrade — most  of  the 
factories  are  going  at  a  good  clip — re- 
tail stores  are  enjoying  a  better  volume 
than  they  have  for  some  time.  And 
the  new  lj^-volt  sets  have  put  a  lot  of 
pep  into  Howard  dealers  and  jobbers." 

A  3-day  New  Year's  Eve  party  at  the 
Ambassador  Hotel  in  Atlantic  City, 
N.  J.,  has  been  arranged  for  dealer 
guests  by  the  RCA  jobbers  Bruno-New 
York,  Inc.,  460  W.  34th  St.,  New  York 
City.  An  RCA  Victor  special  train  will 
leave  New  York  Friday,  Dec.  30;  the 
party  will  continue  through  Monday, 
Jan.  2. 

Early  November  event  at  Arcturus 
Radio  Tube  Co..  Newark,  N.  J.,  was  a 
big  "open  house"  party  for  2,500  guests 
who  were  personally  conducted  through 
the  plant  by  Arcturus  executives  and 
engineers.  A  feature  of  the  event  was 
a  visit  to  the  departments  where  tubes 
are  given  137  tests  before  they  leave 
the  factory.  Here  the  guests  were 
amazed  at  the  mass  and  variety  of  the 
testing  instruments  used.  The  high- 
speed packing  department  was  also  a 
center  of  interest.  Arcturus  plans  to 
stage  more  of  these  events. 

Larger  quarters  at  17  W.  20th  St., 
New  York  City,  have  been  occupied  by 
Amplifier  Co.  of  America.  The  com- 
pany will  continue  its  policy  of  uncon- 
ditional 5-year  guarantee  and  free  trial 
offer  on  amplifiers  and  PA  equipment. 


PROGRESS  IN  VERTICAL  ANTENNAS 


Presenting  a  vertical  antenna  which 
provides  non-directional  pick-up  char- 
acteristics, made  by  Chas.  Avnet  Co., 
New  York  City.  12  and  15  ft.  multi- 
section masts  available  with  or  with- 
out noise-reducing  transformers  and 
transmission  line. 

A  group  of  dealers  and  servicemen 
from  Evansville,  Ind.,  were  recent 
guests  of  Ken-Rad  Tube  d  Lamp  Corp., 
Owensboro,  Ky.,  for  a  dinner,  a  dis- 
cussion meeting,  and  an  inspection  of 
the  Ken-Rad  factory.  The  group  was 
also  addressed  by  several  of  the  Ken- 
Rad  engineers. 

Charles  B.  Shapiro,  sales  manager  of 
Howard  Radio  Co.,  was  a  recent  guest 
at  the  California  distributors  for  How- 
ard, Dunham,  Carrigan  d  Hayden,  San 
Francisco. 

President  Octave  Blake  of  Cornell- 
Dubilier  Electric   Corp.,   South   Plain- 


field,  N.  J.,  has  announced  a  dividend 
of  10c  per  share  on  all  CD  common 
stock.  Unusually  successful  year  for 
the  company  was  due  to  the  develop- 
ment of  new  products  and  new  appli- 
cations for  them,  according  to  the  an- 
nouncement. Modernization  of  the 
firm's  equipment  was  continued 
throughout  the  period. 

Universal  Camera  Corp.  has  occupied 
new  and  larger  quarters  on  three  floors 
of  the  building  at  28-30  W.  23rd  St., 
New  York  City.  Executive,  sales,  engi- 
neering and  general  facilities  have 
been  expanded  and  re-styled.  The  new 
set-up  includes  a  series  of  displays 
which  give  dealers  ideas  for  window 
dressing;  visitors  are  cordially  invited 
to  take  a  look. 

STROMBERG  PRICE  CHANGES 

Increased  prices,  f.o.b.  Rochester, 
N.  Y.,  on  three  Stromberg-Carlson 
radios  to  go  into  effect  soon,  were  an- 
nounced recently  by  radio  sales  man- 
ager Lee  McCanne.  No.  340-M  will 
list  at  $135  instead  of  $127.50;  No. 
345-M  at  $159.50  instead  of  $150;  and 
No.  350-M  at  $187.50  instead  of  $175. 
These  new  f.o.b.  prices  will  go  into 
effect  Nov.  25th  or  before  if  the  pres- 
ent factory  run  is  exhausted  before 
that  time. 

Mr.  McCanne  said,  "These  three 
models  were  formerly  priced  low  in 
order  to  more  quickly  acquaint  the 
public  with  the  advantages  of  the 
Labyrinth.  Now,  with  the  Labyrinth 
story  so  well  known,  and  so  many 
orders  received,  it  seems  advisable  to 
advance  prices  to  cover  their  true 
worth." 


Dumom  ELECTRIC  CO 

514   BROADWAY,  NEW  YORK 


Get  Volume  Sales  On 
Record-Changer  Sets 
Folks  Can  Afford 


Mode!  "M 


LOW  ADDITIONAL  COST- 

OVER  HAND  CHANGING 

MEET  the  natural  demand  for  automatic  record 
playing  without  high  cost.  Sell  the  homes  of 
moderate  means  that  build  volume  sales.  Install  General 
Industries  Record  Changer  Units  in  your  radio-phono- 
graph  combinations. 

Model  "M"  shown  above  plays  and  changes  eight 
10-inch  or  seven  12-inch  records,  repeating  the  last.  Has 
famous  Flyer  Motor  with  turntable  and  pointer-and- 
dial  speed  adjustment.  Dependable,  simple,  smooth- 
working  record  changer.  High-fidelity  pick-up — either 
crystal  or  magnetic.  Completely  assembled,  self-enclosed 
unit   ready   to   install   in   cabinets  with   low  labor   cost. 

Write    today    for    full    information. 
Order   sample    Model   "M"   to   test. 


TEIES  CO., 

ELYRIA,  OHIO 


3838  TAYLOR  STREET 


56 


Radio  Today 


SOUND  MEN! 


ARE  YOU  OVERLOOKING  C.I.S.E? 


See  what  FREE  membership  in  the 
Clarion  Institute  of  Sound  Engi- 
neers does  for  those  who  qualify! 
Gives  you 

1  Factory  purchasing  power! 

2  Exclusive  selling   territory! 

3  Free  engineering  and  consulting 
service ! 

4  Competition-smashing  prices! 

5  Protected  profits  on  the  fastest- 
selling,  most  complete  line  of  P. A. 
equipment  in  the  world! 

Several  choice  territories  still  open. 
Send  today  for  complete  information! 


CLARION  INSTITUTE  OF  SOUND  ENGINEERS 

69    WOOSTER    STREET,    NEW    YORK    CITY 


REPLHCEIHEIIT 


mad 

AMAZINGLY 

SIMPLE 

•  Servicemen,  with  only  4  stand- 
ard types  of  Amperite  AC-DC 
Regulators  you  can  replace 
90%  (over  100  types)  of  AC- 
DC  Ballast  Tubes  now  in  use! 

Consult  your  jobber, 

•  Amperite  Regulators  are 
equipped  with  a  patented 
Automatic  Starting  Resistor  to 
prevent  untimely  burnouts  and 

save  pilot  lights. 

•  New  Low  Price  on  Amperite 
AC-DC  Regulators:  $1.00  LIST 

Amperite     Replacements 

for  2 V  Battery  Set  ballasts 

$1.25  list 


^MPERITE 
(ompany 


WRITE 
FOR 

CHART 
AR 


AMPERITE 

AUTOMATIC   REGULATORS 


SPARTON  WIRELESS 
PHONOGRAPH  DISPLAY 


Prominent  among  the  merchandis- 
ing plans  for  the  novel  Sparton 
Wireless  Phonograph  is  a  four-color 
screen  process  display  stand  suitable 
for  counter,  window  or  store  display. 
Sturdily  built,  it  serves  as  a  solid 
foundation  for  the  wireless  phono- 
graph and  also  provides  a  pocket  for 
the  microphone  that  is  shipped  with 
each  machine. 

Free  to  all  dealers  demonstrating 
the  Sparton  Wireless  Phonograph,  it 
brings  the  merchandise  out  into  the 
open  and  makes  demonstration  and 
sales  much  easier,  ft  is  2  8  inches 
high,  21%  inches  wide  and  10% 
inches  deep. 

RADIO  HAPPINESS  PROMOTED 
IN  6  COLORS 

A  dramatic  boost  for  radio  as  an 
all-important  source  of  home  enter- 
tainment is  found  in  a  new  display 
issued  by  National  Union  Radio 
Corp.,  Newark,  N.  J.  Lithographed 
in  six  colors  on  a  heavy  board  2x4 
feet,  the  idea  is  that  consumers 
should  keep  their  sets  in  good  condi- 
tion, to  enjoy  news,  comedy,  drama, 
symphony,  dance  bands  and  opera 
as  broadcast  by  the  networks. 

National  Union  has  also  released 
a  Radio  Foto  Log,  for  dealers  to  dis- 
tribute to  customers.  Its  32  pages 
include  feature  pictures  of  radio  fig- 
ures, program  guides,  station  lists, 
notes  on  new  trends,  etc. 

A  new  display  banner,  on  heavy 
weather-resistant  stock  so  that  it 
may  be  used  indoors  or  out,  has  also 
been  issued  by  the  company  for  deal- 
ers who  want  to  exhibit  the  lively 
illustrated  sales  message  "Pep  up 
your  radio  with  National  Union 
Tubes." 

BRIGHT  DISPLAY  FOR  JOBBERS 

To  call  attention  to  the  test  instru- 
ments made  by  Radio  City  Products 
Co.,  88  Park  Place,  New  York  City, 
the  company  has  released  to  dis- 
tributors a  handsome  die-cut  display 
for  windows  or  counters.  Two  of 
the  RCP  models  are  featured  among 
colors  that  are  lively  and  pleasant. 


I  fRlC 


TYPE  CS 


VOLUME 
CONTROLS 


ck, 


Bring  you 
RADIO'S  MOST 
EFFECTIVE  NOISE 
ELIMINATING 
FEATURES 


® 

® 


Silent  Spiral 
Connector 

5-  Finger  Knee 
Action  Silent 
Element  Contactor 


,  .  .  each  equally  important, 
each  pioneered  and  perfected 
by  IRC.  The  combination  of 
these  two  features  plus  the 
outstanding  dependability  of 
the  famous  IRC  Metallized 
type  element  insures  better 
performance  under  all  condi- 
tions than  any  other  known 
construction. 

INTERNATIONAL 

RESISTANCE   COMPANY 

401  N.  BROAD  ST.,  PHILADELPHIA 


November,  1938 


57 


NEW! 

Model  CC 


CAPACITOR 
ANALYZER 


Incorporates  Model  CB  Features,  plus  High  Capacity  Scale,  High 
Test  Voltage,  Simplified  Scales,  Sloping  Panel 

This  advanced  Analyzer  measures  Capacity  .00001  to 
800  mfd.,  including  motor  starting  condensers;  measures 
Power  Factor  0  to  50%,  including  motor  starting  con- 
densers; measures  Resistance  50  to  2,000,000  ohms; 
measures  Insulation  Resistance  to  1000  megohms,  using 
test  voltages  to,  600  D.C.;  detects  leakage  and  intermit- 
tents.  A.C.  operated. 

Cat.  No.  CC-1-60  (110  v.,  60  eye.)  Less  tubes— $24.90  net 
Order  through  your  jobber 

SOLAR  MFG.  CORP.  599-601  Broadway,  New  Yprk 


•     INDEX    • 

TO 

ADVERTISEMENTS 


Page 

AER0V0X    CORP 46 

ALADDIN    RADIO    INDUSTRIES.    INC 33 

AMERICAN    CONDENSER    CORP 55 

AMERICAN     MICROPHONE    CO.,    INC 53 

AMPERITE  CO 57.  60 

ARCTURUS    RADIO    TUBE    CO 21 

AVNET    CO.,    CHARLES    48 

BURSTEIN-APPLEBEE    CO 50 

CENTRALAB      54 

CINAUDAGRAPH     CORP 50 

CLARION    INST.    (TRANSFORMER    CORP.   OF 

AMERICA)     57 

CORNELL-DUBILIER    ELEC.    CORP 49 

CR0SLEY    RADIO    CORP 4 

DUM0NT  LABS.,   INC..  ALLEN   B Cover  IV 

DUM0NT   ELECTRIC    CO 56 

EMERSON    RADIO   &   PHONOGRAPH    CORP..     3 

GARRARD   SALES   CORP 52 

GENERAL    ELECTRIC    CO Cover  II 

GENERAL    INDUSTRIES    CO 56 

HYGRADE    SYLVANIA    CORP 27 

INTERNATIONAL    RESISTANCE    CO 57 

JANETTE    MFG.    CO 54 

KEN-RAD   TUBE   &   LAMP   CORP.,    INC 46 

MALL0RY   &   CO.,    INC..    P.    R 1 

MEISSNER     MFG.    CO 35 

MILLION    RADIO   &  TELEV.   LABS 59 

MUELLER   ELEC.   CO 48 

NATIONAL    UNION    RADIO    CORP 53 

PHILC0    RADIO    &   TELEV.    CORP., 

Phonograph  Div.  6 
PHILCO  RADIO  &  TELEV.  CORP.,  Set  Div..  8 
PHILC0   RADIO   &  TELEV.  CORP.,  Tube   Div.     7 

P0RT-0-MATIC    CORP 59 

RADIO   CORP.   OF   AMERICA 2 

RADIO    SERVICEMEN    OF   AMERICA,    INC...   60 

RAD0LEK   CO 59 

RAYTHEON    PRODUCTION   CORP 5 

RCA    MFG.    CO.,    INC 29,  30,  31,  32,  39 

READRITE   METER  WORKS    48 

SCIENTIFIC    DIATHERMY    CORP 55 

SERVICE    INSTRUMENTS    INC 47 

SOLAR    MFG.    CORP 58 

SPARKS-WITHINGTON     CO 19 

SPRAGUE    PRODUCTS    CO 51 

STANDARD    TRANSFORMER    CORP 51 

STEEM-ELEC.    CORP 45 

TRIPLETT   ELEC.    INSTRUMENT   CO 25 

TUNGS0L    LAMP   WORKS,    INC 55 

WARD    PRODUCTS    CORP 59 

WEBSTER-CHICAGO     43 

WESTON   ELEC.    INSTRUMENT  CORP... Cover   III 
WHOLESALE    RADIO    SERVICE    CO.,    INC....    60 

WILCOX-GAY    CORP 52 

WINCHARGER    CORP 41 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against  the 
possibility  of  an  occasional  change  or 
omission    in   the   preparation   of  this    index. 


58 


Radio  Today 


NEW! 

t  WARD'S  DE  LUXE 
HOME  AERIAL  MAST 


JOBBERS  AND  REPS 


*  Can  be  sold  to  replacement  mar- 
ket as  well  as  with  new  sets 

•  Provides  better  reception,  better 
pickup  than  old  style  "clothes- 
line" aerials 

•  Made  of  attractive,  rustproof, 
nickel-plated  bronze  tubing;  4 
sectional;  12  ft.  high 

•  Easy  to  mount  to  soil  pipe,  or 
against  chimney,  window  frame, 
garage,  etc. 

FREE!  Write  today  for  free  catalog 
of  WARD'S  complete  line  of  aerials 
for    ear    and    home. 


rk*  WARD PRODUCTS  At/.. 

WARD   BUILDING  CLEVELAND,   OHIO 


SOUND 

AS    ENGINEERED    BY 

MILLION 


5   WATTS    $49.95 

•  A  powerful  midget — complete  with  microphone 
and  twin  speaker  system.  Provides  ample  power 
for   small    halls,    etc. 

10   WATTS    $79.95 

•  Full  10  watts  with  maximum  push.  Portable 
twin  speaker  case,  table  stand  and  microphone. 
Power   to   spare.     Amplifier   only   $34.95. 

17   WATTS    $99.95 

•  Super  power  system  for  semi-heavy  duty  service. 
Has  split  twin  speaker  case,  table  stand  and 
microphone.    Amplifier  only  (illustrated)  $49.95. 

35   WATTS    $149.95 

•  Full    35   watt   heavy   duty    system.     With   three 
piece  split  speaker  case,  table  stand  and  micro- 
phone.    Amplifier   only   $79.95. 
LITERATURE  AND   PRICES  ON    REQUEST. 

MILLION 

RADIO   AND  TELEVISION   LABS. 

697  W.   OHIO  ST.  CHICAGO,    ILL. 


OHIO— George  H.  Cameron,  2662 
Shaker  Road,  Cleveland,  recently  ap- 
pointed sales  representative  in  Ohio 
and  Kentucky  for  the  line  of  set  and 
tube  testers  made  by  Radio  City  Prod- 
ucts Co. 

ILLINOIS— Stuart  D.  Clayton,  10827 
S.  State  St.,  Chicago,  now  represents 
the  Radio  City  Products  Co.'s  line  of 
tube  and  set  testers  in  Indiana,  Wis- 
consin and  southern  Illinois. 

ALABAMA — McGowan  Lyons  Hard- 
ware Co.,  113  N.  Water  St.,  Mobile,  are 
new  distributors  in  this  state  for  How- 
ard radios.  To  assist  this  jobber  in 
promotion  of  the  Howard  line  here,  is 
E.  L.  Hollingsworth  of  Hollingsworth 
&  Still,  southeastern  representatives 
for  the  Howard. 

INDIANA— Charles  D.  Southern.  116 
W.  Rudisill  Blvd.,  Ft.  Wayne,  has  had 
his  territory,  for  radio  products  made 
by  Ward  Leonard,  extended  to  include 
Ohio,  Kentucky  and  Indiana. 

CALIFORNIA— Norman  B.  Neely, 
manufacturers  representative,  1656  N. 
Serrano  St.,  Los  Angeles,  has  added  a 
new  sales  engineer  to  his  staff — Frank 
McRae.  Having  a  wide  experience  in 
technical  radio  pursuits,  Mr.  McRae  fits 
nicely  into  the  Neely  organization, 
which  accents  specialized  technical 
sales  promotion  for  manufacturers. 

VIRGINIA— George  W.  Hudson,  3303 
E.  Broad  St.,  Richmond,  now  represents 
Radio  City  Products  Co.,  Inc.,  makers 
of  tube  testing  equipment.  He  will 
also  cover  North  and  South  Carolina. 


NEW  BOOKLETS 


Aerovox  Corp.,  7  0  Washington  St., 
Brooklyn,  N.  Y. — condensed  catalog 
on  condensers  which  includes  listing 
of  the  most  popular  types  of  carbon 
and  wire  wound  resistors.  In  handy 
form,  the  catalog  also  features  exact- 
duplicates  plus  exact-duplicate  motor- 
starting  capacitor  replacements. 

Amplifier  Co.  of  America,  17  W.  20th 
St.,  New  York  City — 1939  catalog  of 
amplifiers,  an  entirely  new  line  using 
the  new  6SF5  and  6SK7  tubes.  Com- 
plete specifications  given  for  14  ad- 
vanced designs,  as  well  as  accessories. 
Copies  are  free. 

Audak  Co.,  500  Fifth  Ave.,  New 
York  City — an  eye-catching  descrip- 
tive catalog  of  entire  Audak  line  of 
pick-ups  and  cutting  heads,  including 
latest  "Compensated  Microdyne" 
models.  Written  for  dealers  and  ser- 
vicemen as  well  as  technicians.  Copies 
come  direct  from  Audak. 

Port-O-Matic  Corp.,  1013  Madison 
Ave.,  New  York  City — titled  "Port- 
O-Matic  Goes  to  Town — and  Coun- 
try," here  are  16  pages  of  portable 
combinations,  radios,  phonographs, 
and  accessories,  with  photos  and 
specifications. 

Presto  Recording  Corp.,  137  W. 
19th  St.,  New  York  City — a  "go  to 
your  dealer"  booklet,  for  customer 
distribution,  on  home  recordings.  A 
dozen  Presto  models  are  shown,  along 
with  blank  discs  and  needles. 


SEND  FOR  NEW 

CATALOG  DESCRIBING 

AMERICA'S  GREATEST 

PORTABLE  PHONO-RADIO 


and  complete  line  of  portables 

from  $54.50  to  $199.50 
A   live,   fast  -  moving   line   for 
Christmas  and  a/J-year  trade 

Write  Now 

THE  PORT-O-MATIC  CORP. 

1013   MADISON  AVE.  N.  Y.  C. 


Everything   in   Public   Address 

•  Radolek's  P. A.  line  is  complete!  High-gain 
high-fidelity  amplifiers.  Complete  portable,  perma 
nent  and  mobile  systems.  Record  playing  systems 
Outputs  of  5  to  90  watts  for  every  installation 
Quality  construction.  Lowest  prices.  Entire  line  de. 
scribed  fully  in  the  new  1939  Radolek  Profit  Guide. 

Most  Complete  Radio  Parts  Catalog 

•  Radolek  has  over  12,000  items  in  stock  for 
immediate  shipment.  Radolek's  prices  are  lowest. 
Send  for  the  new  1939  Radolek  Profit  Guide  now. 
It  contains  over  3,000  new  items  over  the  previ- 
ous edition.  It  will  give  you  new  ideas  in  conduct- 
ing your  radio  business  on  a  more  profitable  basis. 

in!  "radolek"  &. 

601  W.  Randolph,  Chicago,  Dept.  D-25 

Send  me  the  new  1939  Eadolek  Profit  Guide 
FREE. 

Name    

Address    

Serviceman?  D        Dealer?  □        Experimenter?  □ 


November,  1938 


59 


HIGH  OR  LOW  PITCH 

WITH   THE   SAME   MICROPHONE 

With  the  flip  of  a  finger  you  can  now  (I)  lower 
or  raise  the  response  of  the  microphone.  .  .  (21 
adjust  the  microphone  for  mosf  desirable  re- 
sponse for  cfose  fafia'ng  or  distant  pickup: .  . 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment. 

MODELS  RBHk.  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  11000  cps,  output, 
-65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable. S42.00  LIST 

NEW!  MODEL  RSHk  (hi-imp);  RBSk 
(200  ohms)  Frequency  range  60  to  8000 
C.P.S.  Output  -68db Chrome  or  Gun- 
metal $32.00  LIST 

NEW  LOW  PRICE  CONTACT  "MIKE" 

ModelSKH'(hi-imp);SKL(200ohms)  $12.00  LIST 

MODELS  RAH-HAL,  excellent  for  speech  and 

music.  Reduce  feedback S22.00  LIST 

Write  for  Complete  Illustrated  Bulletins  and 
Valuable  Sales  Helps. 

561  BROADWAY,  N.  Y. 


AMPERITE  (g. 


WEWTE   ^ 


Cable  Address;  Alkem,  New  York 


MICROPHOHl 


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100  SIXTH  AVE.,  NEW  YORK,  N.  Y. 

CHICAGO,  ILL    •     ATLANTA,  GA.     •     BOSTON,  MASS. 
BRONX,  N.  Y.     -      NEWARK.  N.  J.     •     JAMAICA,  L.  I. 


BOSTON,  MASS. 
JAMAICA,  L.  I. 


COLOR  SPLASH  FOR  CINE  8 

Sixty  new  features  of  the  new 
1939  Cine  8  movie  camera  made  by 
Universal  Camera  Corp.,  28-30  W. 
2  3rd  St.,  New  York  City,  are  stressed 
in  a  new  4-color  window  and  counter 
display  introduced  by  the  firm.  This 
16"x24"  attention-getter  rests  solidly 
on  a  large  wing  easel,  and  is  avail- 
able to  dealers  stocking  the  camera. 


ADVERTISING  MANAGER 
AVAILABLE 

A  seasoned  advertising  and  sales 
promotion  manager. 

Radio  Today  will  be  pleased  to  put 
those  interested  in  touch  with  this  man 
.  .  .  who  possesses  exceptional  ability 
and  experience  in  the  major  electrical- 
appliance  field.  He  knows  the  tech- 
nique of  advertising  and  sales  promo- 
tion from  every  angle,  he  has  wide 
acquaintance  among  distributors  and 
dealers,  and  has  had  retail  as  well  as 
factory  experience. 

This  man  has  a  clear  understanding 
of  the  virtues  and  faults  of  co-operative 
advertising,  has  the  willingness  and 
ability  to  operate  within  a  budget,  is 
level-headed,  and  has  a  record  of  loyal- 
ty and  dependability.  He  is  college- 
bred,  gentile  American. 

Address  Box  Al,  Radio  Today,  480 
Lexington  Ave.,  New  York,  N.  Y. 


STATEMENT  OF  THE  OWNERSHIP,  MANAGE- 
MENT.  CIRCULATION.  ETC..  REQUIRED  BY 
THE  ACTS  OF  CONGRESS  OF  AUGUST  24,  1912, 
AND    MARCH    3,    1933 

Of  RADIO  TODAY,  published  monthly  at  New  York 
N.  Y.,  for  Oct.  1,  1938.  State  of  New  York,  N.  Y  , 
County   of  New  York,   N.    Y. 

Before  rue,  a  Notary  Public  in_and  for  the  State 
and  county  aforesaid,  personally  appeared  Orestes  H. 
Caldwell,  who,  having  been  duly  sworn  according  to 
law,  deposes  and  says  that  he  is  the  Editor  of  RADIO 
TODAY  and  that  the  following  is,  to  the  hest  of  his 
knowledge  and  belief,  a  true  statement  of  the  owner- 
ship, management  fand  if  a  daily  paper,  the  circu- 
lation), etc.,  of  the  aforesaid  publication  for  the 
date  shown  in  the  above  caption,  required  by  the  Act 
of  August  24,  1912,  as  amended  by  the  Act  of  March 
3,  1933,  embodied  in  section  537,  Postal  Laws  and 
Regulations,    to   wit: 

1.  That  the  names  and  addresses  of  the  publisher, 
editor,  managing  editor,  and  business  managers  are: 
Publisher,  Maurice  Clements.  277  Park  Avenue.  New 
York,  N.  Y.  Editor,  Orestes  H.  Caldwell,  Catrock 
Road,    Cos    Cob,    Conn. 

2.  That  the  owner  is  (If  owned  by  a  corporation, 
its  name  and  address  must  be  stated  and  also  imme- 
diately thereunder  the  names  and  addresses  of  stock- 
holders owning  or  holding  one  per  cent  or  more  of 
total  amount  of  stock.  If  not  owned  by  a  corporation. 
the  names  and  addresses  of  the  individual  owners  must 
be  given.  If  owned  by  a  firm,  company,  or  other  un- 
incorporated concern,  its  name  and  address,  as  well 
as  those  of  each'  individual  member,  must  be  given.) 
Caldwell-Clements,  Inc.,  4S0  Lexington  Avenue,  New 
York,  N.  Y.,  Maurire  Clements.  277  Park  Avenue, 
New  York,  N.  Y.,  Orestes  H.  Caldwell,  Catrock  Road, 
Cos    Ccb,   Conn. 

3.  That  the  known  bondholders,  mortgagees,  and 
other  security  holders  owning  or  holding  1  per  cent 
or  more  of  total  amount  of  bonds,  mortgages,  or  ether 
securities   are:      (If  there  are   none,   so  state.)      None. 

4.  That  the  two  paragraphs  next  above,  giving  the 
names  of  the  owners,  stockholders  and  security  holders, 
if  any,  contain  not  only  the  list  of  stockholders  and 
security  holders  as  they  appear  upon  the  books  of  the 
company  but  also,  in  cases  where  the  stockholder  or 
security  holder  appears  upon  the  books  of  the  com- 
pany as  trustee  or  in  any  other  fiduciary  relation,  the 
name  of  the  person  or  corporation  for  whom  such 
trustee  is  acting,  is  given ;  also  that  the  said  two 
paragraphs  contain  statements  embracing  affiant's  full 
knowledge  and  belief  as  to  the  circumstances  and  con- 
ditions under  which  stockholders  and  security  holders 
who  do  not  appear  upon  the  books  of  the  company  as 
trustees,  hold  stock  and  securities  in  a  capacity  other 
than  that  of  a  bona  fide  owner;  and  this  affiant  has 
no  reason  to  believe  that  any  other  person,  associa- 
tion, or  corporation  has  any  interest  direct  or  indirect 
in  the  said  stock,  bonds,  or  other  securities  than  as 
so  stated  by  him. 

(Signed)    Orestes   H.    Caldwell 

B.    M.    Phillips 

Notarv    Public,    New   York    County 

Sworn  to  and  subscribed  before  me  this  2Gth  day  of 
September.    1938.  _        _ 

Notary  Public,  Westchester  County,  Belle  Mead  Phil- 
lips   County    Clerk's    No.    396. 

New  York  County  Registrar's  No.  8  P  227  (My  com- 
mission  expires   March   30,   1940) 


YOUR  LAST 
CHANCE! 

* 

Dues  Will  Be  Increased 
January  1, 1939. 

•  $1.00  of  1938  dues  will  be 
credited  on  1939  dues  if  you 
join  before  Jan.  1,  1939. 


RSA  has  pioneered  and  established 
these  benefits  for  yon.  Join  now — so 
you  can  get  them: 

*  Membership  in  the  only  Indepen- 
dent Servicemen's  Organization  in 
the  industry.  *  Advanced  Service 
Courses  for  Members.  *■  Technical 
advice  and  assistance  for  members 
asking  it.  *  Recognition  by  and  rep- 
resentation in  the  entire  servicing 
business.  *  RSA  is  as  important  to 
you  as  your  job  or  your  business. 
Don't  wait — send  your  application  in 
TODAY! 


RADIO  SERVICEMEN 
OF  AMERICA,  Inc. 

JOE  MARTY,  JR.,  Executive  Sec'y. 
304  S.  Dearborn  St.,  Chicago 

▼  Mail  This  Coupon  ▼ 

— >-— —————— —-«—.— -i 

RADIO  SERVICEMEN  OF  AMERICA,  Inc. 
304  South  Dearborn  St.,  Chicago,  III. 

Gentlemen: 

I   hereby   make   application    for  membership 

in    the    Radio    Servicemen    of    America. 

Name    

Home    Address     

City State 

Firm    Name    

Address    

I  am  enclosing  $2.00  National  Yearly  Dues. 

(Nominal  Local  Chapter 
Dues      not      included.) 


•  •  The  Best  $2.00 
You  Ever  Invested 


60 


Radio  Today 


NO  MATTER  HOW 
YOU  TEST  ...  you 

need  an  oscillator  that 


Here's  the  Oscillator  with 
automatic  amplitude  con- 
trol and  hand  calibrated 
dial  . .  .  that  doesn't  drift, 
that's  guaranteed  to  hold 
Its  accuracy. 

TO  SERVICEMEN  IN  U.S.A. 


Weston 
sg  oscillator 

See  this  Model  776  Oscillator  at  your  jobber's  today, 
as  well  as  the  inexpensive  Weston  Vacuum  Tube  Volt- 
meter. Or,  return  coupon  immediately  for  complete 
information. 

-  ™  .»_■■—  —  —  -•____•____  _-_  _  _  mi  »  »  m  mi 

Weston  Electrical  Instrument  Corporation, 
597  Frelinghuysen  Ave.,  Newark,  N.  J, 

Send  literature  describing  Model  776  Oscillator  and  669  Vacuum 
Tube  Voltmeter 

Name 

Address 

City ,....'. State 


ECEIVERS 


Jft\.  Phoghessive   Deal 

HUM     O  DISPLAY  TELEVISION  IN  YOUH  COMMUNITY 


.EH 


^Aes  everything  desirable  in  a  compact  Table  Model  sight 
^Bbd    receiver.       The    trim,    beautifully    grained 
^^fesurcs  approximately   24  inches   high,    IS   inches  wide, 
^^^s   deep.      This   Receiver   incorporates   independent 
^kght    and    sound    channels    singly   controlled.      A 
^■W-9-T  14  inch  Telctron  provides  a  brilliant  blacj 
H^v    10    inch    picture    of    excellent 
m^nploycd.      Power   cc 


This  is  your  pound  floor  opportooit 
to  the  long  anticipated  Television 
^  Sales-Hey-Day 

EASY  SALES 

tleur  and 
BIGGER  PROFITS 

Yoor  customers 
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U.  S.  Radio  Leads  World 


io  Here  and  Abroad 


DECEMBER 


Caldwell-Clements,  Inc. 


6-E  RADIO  MS  UP 
ITS  GREATEST  YEAR 

j  i  Mir  ailM 


(  r  F  Radios  produced! 
.  Greatest  in  number  °<^R  dl0ss0,d.  Greatest 

^Tafl^cmrfi«tWith  theses  the 
public  wants. 

First  with  Time  Tuning 
Adthisisonlythebeginning.WacchG-ERad1o 

^939 'i-E  Radio  is  on  the  march. 


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MODEL 
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GREAT  FEATURES: 


•  THE  G-E  BEAM-A-SCOPE 

No  aerial!  No  ground  wires!  Reduces  local  static  in- 
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•  KEYBOARD  TOUCH  TUNING 

Easy.  Accurate.  Lightning  Fast!  Your  program  at  the 
touch  of  a  key. 

•  G-E  TIME  TUNING 

Pick  your  programs  on  five  different  stations  for  24 
hours  ahead — the  G-E  Automatic  Program  Preselector 
does  the  rest.  No  re-tuning!  No  re-dialing! 


MODEL  G-75 


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RADIO  TODAY,  December,  1938,  Vol.  IV,  No.  12,  published  monthly  by  Caldwell-Clements,  Inc.,  480  Lexington  Ave.,  New  York,  N.  Y.  Subscription 
price  U.  S.  and  Latin  American  countries:  $1.00  for  2  years.  Canada:  $1.25  for  2  years.  All  other  countries  $2.00  for  2  years;  single  copy,  15c.  Entered 
as  second-class  matter  July  24,  1936,  at  the  post  office  at  New  York,  N.  Y.,  under  the  Act  of  March  3,  1879.  Printed  in  U.S.A.  Member  of  A.  B.  C. 
Copyright    1938    by    Caldwell-Clements,    Inc. 


"firing  the  Yule  Jj?g" — From  a  wood-cut  by  elter,  illustrating  the  festive  ceremony  that 
in  olden  times  officially  opened  the  Christmastime  season. 

Ifnlt&atj  dmttttgB 

FROM  HYGRADE  SYLVANIA  CORPORATION 


Radio  Today 


"MUSIC 
YOU  WANT" 


PROGRAMS 

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MAGIC  KEY 
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9,000,000  listeners 
every  Sunday! 


40th 
ANNIVERSARY 
CELEBRATION 

which  was  cele- 
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—  with  sales! 


VICTOR 
RECORD  SOCIETY 

47,831  members  to 

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December,  1938 


LATEST  1939 

RADIOS 


(Below)  The  "SIXER 
DE  LUXE"  6  tube  super- 
heterodyne, including  short 
wave  reception.  5  inch 
speaker,  5  push  button  and 
knob  tuning,  mgkgk^m1l 
Sliced  wal-  O1!  '■■-! 
nut  cabinet. 


22! 


BEST 

SELLERS 

EVERYWHERE 


(Above)  Tlie  "SIXER" an  achievement 
in  design  and  performance — 6  tubes, 
superheterodyne  including  short  wave 
reception,  5  push  buttons,  the  Crosley 
simple  mechanical  rrestotune,  and  knob 
tuning.  Slide  rule  dial — exquisite  brown 
plastic  case.  In  ivory  tt^  ^VQQ 
or  red  finish  at  slight  ¥ 
additional  cost. 


19! 


(At  top)  The  Super  Sextette,  beauty 
prize  winner  for  looks.  6  tubes  (includ- 
ing ballast)  with  beam  power  output. 
Superheterodyne  AC-DC  with  6  tuned 
circuits.  Brown  and  black  mottled 
plastic  cabinet — 4  push  buttons  and 
knob  tuning.  In  ivory  0  J  M  Qft  ■ 
or  red  finish  at  slight  ¥  II  *■ 
additional  cost. 


14! 


CONSOLE 


efficiency  reaches  new  heights  in  1939  cabinet 
design.  PUSH  BUTTON  RADIO-PHONO- 
GRAPH COMBINATION— Six  tube  superhet- 
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knob — Beam  power  out- 
put for  extra  power  and 
sensitivity.  Self  starting 
phonograph  motor.  Love- 
ly stump  walnut  cabinet 
completes  combination  as 
matchless  value.  Satisfac- 
tory volume  and  tonal 
quality  for  all  musiclovers. 


$CQ95 


59 


PERFECTION 

(Left)  In  8  tube,  3  band  superheterodyne — 8  push 
button  tune  selected  stations  plus  knob  tuning. 
Edge  lighted  radio  log  dial.  Massive  cabinet  of 
walnut.  10  inch  speaker.         $AAQC' 


THE 

CROSLEY 

CORPORATION 

POWEL  CROSLEY,  Jr.,  Pies. 
CINCINNATI,  OHIO 

^Prices  West  and  South 
Slightly  Higher. 


w 


(Left)  11  tube  3  band  su- 
perheterodyne completely 
automatic  electric  push 
button  tuning  permits  se- 
lection of  8  stations.  Ra- 
dio-log dial  designates  103 
station  call  letters  includ- 
ing foreign  stations.  12 
inch  speaker.  Adaptable 
to  remote  control. 


99 


50* 


4 


Radio  Today 


'WORLD'S  LARGEST  EXCLUSIVE  RADIO  TUBE  MANUFACTURERS" 

December,  1938  5 


More  Going  After  Customers 

Instead  of 
Waiting  For  Customers 


HARRY  BOYD  BROWN 

National  Merchandising 
Manager  oj  Pbilco 


yTT  is  pretty  generally  agreed  that 
things  look  good  for  1939. 
Business  is  certainly  on  the  up- 
grade. Some  economists  definitely 
predict  a  boom.  Employment  figures,  income 
figures,  news  of  wage  increases — all  point  to 
increased  purchasing  power  for  the  coming 
year.  With  more  money  in  their  pockets, 
people  are  certainly  in  the  mood  to  buy — and 
in  the  mood  to  spend  more  money  for  what 
they  wish  to  buy. 

So  far  as  the  radio  dealer  is  concerned,  he 
had  better  re-examine  his  policies  and  prac- 
tices and  be  sure  that  they  fit  in  with  customer's 
psychology  and  buying  power.  Particularly 
those  dealers  who  have  sold  themselves  on  the 
idea  that  the  public  wants  nothing  but  low- 
priced  merchandise. 

When  we  sit  around  the  luncheon  table,  most 
of  us  who  are  interested  in  retailing,  readily 
agree  that  the  idea  of  "selling-up"  is  pretty 
sound.  We  agree  that  its  the  only  way  to  put 
the  real  profits  into  the  radio  business.  In  fact, 
when  some  of  us  get  real  worked  up,  we  insist 
that  it's  the  only  salvation  of  the  radio  industry. 

But  when  we  go  back  to  our  stores  and  find 
that  "selling-up"  requires  effort  and  initiative, 
all  too  many  of  us  are  ready  to  take  the  line  of 
least  resistance  and  accept  the  sales  that  come 
easy.  Such  sales  require  no  salesmanship  and 
bu'ld  no  very  satisfying  bank  accounts. 

Surely  no  one  can  blame  the  radio  manufac- 
turer for  supplying  the  kind  of  merchandise 
that  the  dealer  sells.  But  the  dealer  can  well 
blame  himself  if  he  puts  his  main  effort  on 
price  brackets  that  yield  meager  profits.  And 
when  it  gets  to  the  point  where  so  many  deal- 
ers are  complaining  that  they  make  a  lot  of 
sales  but  make  no  money,  the  matter  has  be- 
come a  major  problem  for  the  industry. 

I  have  talked  to  many  dealers  in  recent 
weeks  who  laughed  when  I  told  them  that 
some  dealers  don't  seem  to  be  able  to  sell 


PHttC 


higher-priced  merchandise.  They  tell  me  that 
higher-priced  sales  are  as  ripe  for  the  picking 
as  ever.  But  the  picking  methods  have  changed. 
The  sales  are  there  and  the  profits  are  there  as 
much  as  ever — but  it  takes  resourceful  adver- 
tising—  more  selling  —  more  "going  after" 
customers  instead  of  "waiting  for"  customers. 

To  be  specific  the  smart  dealer  today  uses 
his  windows  and  the  floor  of  his  store  to  dis- 
play the  better  quality,  the  higher-priced  radio 
merchandise,  He  emphasizes  terms  and  trade- 
in  allowances,  and  he  uses  the  newspapers  and 
direct  mail  with  heart-to-heart,  human  interest, 
proposition  copy  that  brings  REPLIES — IN- 
QUIRIES—BONA  FIDE  PROSPECTS. 

And,  while  those  dealers  who  sell  higher- 
priced,  more  profitable  radio  merchandise  in 
real  volume,  also  carry  low-priced  radio  mer- 
chandise, they  use  it  intelligently.  They  advertise 
their  low-priced  merchandise — the  $39.00  and 
$49.00  and  $59.00  furniture  models — only  to 
pull  traffic — to  create  prospects.  And  then  is 
when  they  really  go  to  work. 

They  see  to  it  that  their  retail  salesmen  thor- 
oughly know  the  quality  radio  merchandise  in 
stock — every  feature — every  improvement — 
every  reason  why  it  is  worth  more  money.  They 
train  their  salesmen  to  Sell-Up,  and  they  pay 
them  accordingly.  They  teach  them  not  to  be 
in  constant  fear  of  "walk-outs"  but  instead  to 
go  after  bigger,  better  sales  and  make  money. 

And  finally,  the  wise  radio  dealer  in  1939 
will  place  PHILCO  MYSTERY  CONTROL 
RADIOS — just  as  many  as  possible — on  FREE 
TRIAL  in  the  homes  of  responsible  people. 
Every  day  sees  more  and  more  Philco  Mystery 
Control  Radios  sold  by  Free  Trial  in  the  home — 
because  after  a  few  days'  use  of  Mystery  Con- 
trol in  the  home — with  no  more  jumping  up 
from  the  easy  chair  every  1  5  minutes  to  change 
programs — people  are  never  again  satisfied 
with  the  old-fashioned,  troublesome  method 
of  radio  tuning. 


Radio  Today 


Staff- 


n£C    I  ■ 


Darrell   Bartee 

G.  H.  MaYORGA 

X.  McAllister 
M.  H.  Newton 
R.  Neubauer 
B.  V.  Spinetta 
Vinton  K.  Ulrich 


M.  E.  Herring 

Sales  Manager 


R.  Y.  FlTZPATRICK 

201  N.  Wells,  Chicago,  III. 


Orestes   H.    Caldwell 
Editor 

M.  Clements 
Publisher 


Vol.    IV,    No.    12 
Copyright  1938 

Caldwell-Clements,  Inc. 
Tel.  PLaza  3-1340 
4S0  Lexington  Ave. 
New    York,    X.    Y. 


Member    Audit    Bureau    of    Circulations 


DOING  PRETTY  WELL, 
'N  SPITE  OF  EVERYTHING 

Evidences  of  radio  slackening  to  the 
contrary,  all  the  general-business  au- 
thorities declare  we  are  now  at  the 
peak  of  business  activity  for  1938. 
Roger  Babson,  economist ;  New  York 
Times,  and  Business  Week  all  testify 
that  business  as  a  whole  is  ahead  of 
last  year.  Babson  sees  at  least  two 
years  to  come  of  "good  business." 

Radio  sales  for  the  year  1938  are 
expected  to  reach  six  million  sets,  a 
drop  of  25  per  cent  below  the  eight 
million  radios  in  1937.  Automobile 
radios  may  reach  800,000. 

Sales  of  phonograph  records  for  the 
year  will  come  close  to  35,000,000,  an 
increase  of  16  per  cent  over  1937. 
when  30,000,000  records  were  sold. 
This  return  of  records  to  popularity 
has  been  due  to  the  increased  use  of 
"combinations"  and  to  small  portable 
phonograph  units.  Sales  of  records  for 
1938  will  equal  the  peak  year  of  1911. 

SMALL  RADIOS  FAVORED 
BY  XMAS  BUYERS 

Small  sets  hold  the  spotlight  this 
Christmas.  Dealers  blame  this  on 
the  retarded  recovery  and  on  the  buy- 
er's fear  that  "television  is  just  around 
the  corner."  While  unit  volume  is 
about  equal  to  last  year,  dollar  vol- 
ume is  down,  but  many  hope  the  last- 
minute  rush  of  shopping  will  boost 
business  and  push  that  old  sales  curve 
upward. 

Combinations,  too,  are  the  rage. 
And  sales  of  records  have  skyrocketed. 
Wireless  players,  remote  wireless  con- 
trol and  other  1939  selling  points  seem 
to  have  failed  to  arouse  the  interest 
they  should.  There  is  a  demand  for 
them,  but  not  too  large. 

Radio  follows  the  general  trend  in 
this  matter  of  Xmas  buying.  New 
York  department  stores  report  pre- 
Christmas  interest  in  cheaper  goods. 
Sales  of  four  department  stores  on  a 
typical  Saturday  were  off  2,  21/o,  3 
and  10  per  cent. 


NEWSPAPER  PRINTS  EDITION 
ON  RADIOS  IN  HOMES 

Comes  now  the  radio-printed  news- 
paper. On  shortwave  station  W9XZY, 
the  St.  Louis  Post-Dispatch  is  broad- 
casting a  facsimile  edition  each  day 
at  2  P.M.  First  issue  of  the  nine- 
page  paper  "went  to  press"  on  Dec.  7 
after  a  month  of  experimentation. 

RCA  receivers  are  being  used  in 
homes  of  15  staff  members  of  the  Post- 
Dispatch.  By  January,  the  manufac- 
turer expects  to  put  out  such  sets  at 
$260  each.  Several  of  them  will  be 
demonstrated  publicly  on  W9XZY's 
wavelength  of  31,600  kilocycles. 

Using  the  ultra-high  frequencies, 
the  Post-Dispatch  can  broadcast  its 
radio  paper  in  daytime.  Former  fac- 
similes used  the  broadcast  band  and 
were  thus  limited  to  "after  hours" 
service.  The  St.  Louis  "radio  news- 
paper" includes  sports,  cartoons,  ra- 
dio gossip,  stock  market  quotations  as 
well  as  regular  news.  A  clock  sets  the 
receiver  to  pick  up  the  broadcast, 
making  it  unnecessary  to  be  on  hand 
when  the  news  is  being  transmitted. 


S.    N.    Shure,    re-elected    president    of 

Radio    Parts    Manufacturers    National 

Trade    Show   to   be   held   at    Chicago, 

June    14   to    17. 


TRADE  SHOW  JUNE  14-17, 
"JOBBER  DAYS" 

The  1939  National  Radio  Parts 
Trade  Show  will  be  held  at  the  Stev- 
ens Hotel  in  Chicago,  June  14  to  17, 
inclusive. 

Unanimous  approval  was  given  the 
proposal  to  designate  the  first  two 
days  of  the  Show,  June  11  and  15,  as 
"Jobber  Days,"  during  which  time 
only  jobbers,  manufacturers,  manufac- 
turers' agents,  and  manufacturers' 
engineers  will  be  admitted  to  the  Ex- 
hibition Hall. 

On  Friday,  June  16,  and  continu- 
ing through  Saturday,  June  17,  the 
Show  is  to  be  opened  to  all  groups  in 
the  radio  trade  with  especial  emphasis 
among  the  exhibitors  on  manning 
their  booths  with  technically  trained 
attendants. 

HE  PUT  MISS  BATHTUB  TO  WORK 

We're  glad  you  liked  the  blonde-in- 
the  bathtub  who  looked  out  from  the 
October  cover.  Among  the  many  com- 
pliments we've  heard  about  her,  one 
of  the  nicest  comes  from  John  Pfusch, 
dealer  at  1026  Lexington  Avenue. 
New  York  City,  who  built  a  window 
display  around  Radio  Today's  bath- 
ing beauty.  Exhibiting  the  comely 
maiden-in-tub  against  a  rich  blue 
background,  Mr.  Pfusch  made  her 
the  central  theme  in  his  display  of 
some  20  new  sets.  She  tied-up  brightly 
with  his  "mystery  control"  model  and 
did  an  A-l  job  of  arresting  attention. 

Mr.  Pfusch  tells  us  that  she  put 
in  a  full  day's  work  and,  for  that 
matter,  a  full  night's  work  too,  since 
the  display  is  lighted  from  above 
after  the  shop  closes.  Overcoming 
the  handicaps  of  limited  window  space 
(8x>3>4  ft.),  this  New  York  dealer 
achieved  an  effect  of  depth  by  placing 
the  smallest  models  in  the  foreground 
and  stepping  them  up  toward  the 
background  in  a  way  that  gives  a 
pleasing  impression  of  balance.  He 
reports  that  our  gal-in-tub  brought 
to  his  window  that  extra  element  of 
interest  which  a  display  needs. 


December,  1938 


AMERICAN   RADIO   TC 


Because  of  the  magnitude  of  American  radio  in  its  own  dome: 
leadership  in  the  export  field,  giving  foreign  buyers  the  advar 


Largest  production  of  sets 


Largest  production  of  tubes 


2000 

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Largest  output  of  transformers 


Largest  output  of    condensers 


8,500,000^ 

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1937 

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Largest  output  of   speakers 


8 


Largest  output  of  sound  equipment 
Radio  Today 


DAY 


U.S.  Radio  Leads  the  World -in  Output, 
Quality,  Economy,  and  Acceptance. 


rket,  the  U.  S.  radio  industry  has  been  able  to  take  world 
af  its  vast  mass  production  and    capable  engineering  skill. 


Number  of  radio  sets  in  use 


Annual  expenditures  for  U.  S.  programs 


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Improved 
construction, 
lightness, 
compactness 
and  strength. 

Streamlining 


Milestones  in  improvement  of  performance 


Best  design  and  construction  of  sets 


532,000,000 


$25,000,000 
1935 


1938 


total  values  of  U.  S.  radio  apparatus  exported 
December,  1938 


Greatest  radio  value  per  dollar  invested 


AMERICAN   RADIO  TODAY  utS^±^^l±°"r- 


Because  of  the  magnitude  of  American  radio  in  its  own  domestic     market,  the  U.  S.  radio  industry  has  been  abl  , 

leadership  in  the  export  field,  giving  foreign  buyers  the  advanta    ge  of  its  vast  mass  production  and   capable  engineeri     W°J  if 


ity,  Economy,  and  Acceptance. 


Largest  production  of  sets 


Largest  production  of  tubes 


Number  of  radio  sets  in 


Annual  expenditures  for  U.  S.  programs 


Largest  output  of  transformers 


8,500,000 

^^^  1937 

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Largest  output  of   speakers 


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Largest  output  of   condensers 


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Largest  output  of  sound  equipment 
Radio  Today 


Milestones  in  improvement  of  performa 


532,000,000 


525,000,000 
1935 


1938 


T°tal  values  of  U.  S.  radio  apparatus  exported 
December,  1938 


Improved 
construction, 
lightness, 
compactness 
and  strength. 

Streamlining 


Best  design  and  construction  of  sets 


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Greatest  radio  value  per  dollar  invested 


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METHODS 


THAT 
CLICKED 


"Try  it  out"  is  still 
the  best  radio  sales 
idea  —  especially  if 
the  prospect  is  as 
lovely  as  this  Strom- 
berg-Carlson      gal! 


New  twists  on  basic  selling  principles  used  by  U.  S.  radio  dealers 


American  radio  dealers  undertook 
plenty  in  1938. 

Many  decided  to  "Go  Out— And 
Get  The  Business,"  others  were  con- 
tent to  set  the  sales  traps  in  their 
stores. 

Lest  we  forget  how  the  picture 
looks  as  December  rolls  around,  here 
is  reviewed  a  coast-to-coast  collec- 
tion of  radio  selling  methods.  Fit  for 
thought,  all  of  them,  as  radio  men 
now  lay  plans  for  1939 : 

New  Orleans,  La. — A  campaign  to 
sell  extra  radios  dramatically  pointed 
out  that  the  broadcast  fare  is  so  ex- 
citing and  so  varied  that  people  can 
not  afford  to  be  "only  living-room 
listeners."  Advertisements  in  this 
drive  asked,  "Do  Your  Tastes  Dic- 
tate What  Everyone  Must  Listen 
To?",  and  listed  15  distinct  types  of 
radio  broadcasts,  of  special  interest 
to  as  many  different  types  and  ages 
of  people. 

Terre  Haute,  Ind.— Four  consoles, 
set  up  in  a  row,  were  all  covered  up 
and  played  for  blindfolded  judges. 
Picking  up  the  same  type  of  broad- 
cast, the  stunt  was  presented  as  a 
dramatic  test  of  tone,  as  the  judges 


were  asked  to  vote  on  which  gave 
the  most  satisfactory  performance. 
All  this  was  staged  before  an  au- 
dience, and  the  unanimous  decision 
of  the  judges  was  announced. 

Passaic,  N.  J. — Automobile  trail- 
ers, carrying  a  selection  of  radios, 
were  used  here  successfully.  Sales- 
men worked  on  a  commission  and 
covered  a  particular  area  by  doing 
house-to-house  work  in  staggered 
style — one  salesman  taking  every 
other  house.  Prospects  were  invited 
into  the  trailer  for  demonstrations. 
The  trailer  method  of  selling  was 
found  to  be  faster,  and  more  com- 
fortable for  the  salesmen. 

Rochester,  N.  Y. — A  wall-size  plac- 
ard, composed  of  photos  of  radio 
celebrities,  appeared  in  a  dealer's 
window,  with  the  question,  "How 
Many  Do  You  Recognize?"  Radios 
were  displayed  at  the  sides.  The  art- 
ists were  all  being  heard  on  the  local 
station. 

Lubbock,  Tex. — In  making  house- 
to-house  calls,  radio  salesmen  here 
first  mentioned  the  matter  of  radio 
interference.  Their  first  words  to  the 


housewives  were  concerned  with 
matters  of  improved  radio  reception, 
and  their  position  first  appeared  to 
be  that  of  engineers  who  had  organ- 
ized a  check-up  on  radio  interference. 

Washington,  D.  C. — The  practice 
of  sending  out  about  1,500  post  cards 
every  three  weeks  was  tested  and  ap- 
proved. The  dealer  first  tried  mail- 
ing the  cards,  but  switched  to  West- 
ern Union.  Sales  messages  on  these 
pieces  were  kept  down  to  a  simplified 
form. 


Springfield,  Mo. — High  fidelity  of 

demonstrated  at 

ent   of  the  local 

re  managers  got 

officials    of    the 

both    afternoon 

The  public  was 


modern  radios  was 
the  music  departm 
college.  Radio  sto 
together  with  the 
school  and  staged 
and  evening  shows, 
invited  to  the  latter 


Bloomfield,  N.  J. — A  dealer  hired 
women  canvassers  to  cover  his 
house-to-house  area,  in  order  to  line 
up  the  best  prospects  for  his  higher- 
priced  salesmen.  The  method  was 
designed  to  get  more  real  selling,  and 
less  missionary  and  clerical  work, 
into  the  work  of  the  crack  salesmen. 


10 


Radio  Today 


San  Jose,  Calif. — For  an  extra 
place  to  display  radio  sets,  a  radio 
man  here  tied  up  with  a  local  thea- 
ter and  featured  the  displays  when- 
ever the  movie  being  shown  had  a 
special  radio  angle.  His  merchandise 
appeared  in  the  lobby  with  good 
effect  during  the  local  run  of  "Big 
Broadcast  of  1938,''  for  instance. 

Columbus,  Wis. — Local  business 
men,  the  neighbors  of  the  radio 
dealer,  were  regularly  called  on  here, 
and  were  found  to  be  OK  radio  pros- 
pects. A  good  way  to  get  them  in- 
terested in  buying  a  new  set,  ac- 
cording to  the  dealer  report,  was  to 
start  talking  about  favorite  pro- 
grams. These  prospects  are  good 
pay,  and  are  often  interested  in  the 
higher  priced  receivers. 

New  York,  N.  Y. — Sales  of  port- 
able sets  were  helped  here  when  the 
dealer  realized  that  the  chief  thing 
buyers  needed  to  know  was  all  about 
the  power  facilities  at  nearby  vaca- 
tion spots  where  the  portables  were 
to  be  used.  Authentic  and  accurate 
advice  on  this  subject,  volunteered 
by  the  radio  man,  convinced  the 
prospects  that  the  dealer  knew  his 
business  inside  out. 


Terre  Haute,  lnd. — For  a  town  of 
this  size  (population  63,000)  an  ap- 
propriate house-to-house  selling  plan 
was  worked  out :  seven  outside  sales- 
men were  used,  featuring  3-day 
home  demonstrations.  Appliance 
customers,  as  well  as  those  buying 
musical  merchandise,  were  regarded 
as  radio  prospects. 

Seattle,  Wash. — Attractive  young 
lady  demonstrators  appeared  in  radio 
windows  with  microphones,  speaking 
through  public  address  system  to 
those  on  the  street.  Plus  features  of 
new  sets  were  taken  up  one  by  one 
as  receivers  were  demonstrated. 

Wewoka,  Okla. — The  "oldest  radio 
in  the  community"  contest  idea  was 
revamped  and  staged  here.  En- 
trants were  simply  required  to  come 
in  the  store  and  leave  the  dope  on 
their  "oldest"  candidate.  Stunt  net- 
ted store  traffic,  and  long  lists  of 
owners  with  outmoded  models. 

Englewood,  N.  J. — Store  salesmen 
were  awarded  weekly  prizes  for  dig- 
ging  up    new   customers.     Manager 


A  CHECK  LIST  FOR  1939 

Ten  Cardinal  Points  of 
American  Radio  Selling 

Go  out  and  set  the  business. 

Demonstrate  in  the  home. 

Follow   up   former  customers   for 
new  sales. 

Cooperate  with  manufacturers  in 
newspaper  advertising. 

Use  the  mail  to  send  out  circulars, 
booklets. 

Have  an  attractive,  clean  store,- 
courteous  staff. 

Keep  attractive  displays  in  your 
show  windows. 

Offer  installment  payments  on 

higher-priced  sets. 

Use  service  calls  as  openings  for 
receiver  selling. 

Sell  programs,  tone  quality,    con- 
venience— not  technical  details. 


a 


found  that  the  idea  of  having  many 
short  contests  instead  of  a  few 
longer  ones,  kept  everybody  happier, 
passed  the  prizes  around,  and  showed 
salesmen  that  the  search  for  new 
customers  was  a  daily  affair. 

New  York,  N.  Y. — During  periods 
when  important  news  events  were 
happening,  postcards  were  printed  up 
listing  only  the  news  broadcasts  to 
be  heard  in  the  area.  The  dealer  sent 
these  to  customers,  to  make  it  more 
convenient  than  picking  the  news- 
casts out  of  lists  in  the  newspapers. 
The  store  was  quietly  advertised  on 
the  card,  and  prospects  were  advised 
to  keep  the  list  near  the  radio. 


Stand-out    window    shows,    like    that 

above,   preach  a  message,   sell   plenty 

of  new  radio  receivers. 


U.  S.  newspapers  provide  a  basic  ad- 
vertising   medium    for    radio    dealers 
whether     space     is     large     or     small 
(Headlines  by  GE.) 


December,  1938 


Cincinnati,  Ohio  —  Gold  -  finished 
initials  were  used  to  "personalize"  ra- 
dios, so  that  prospects  could  be 
shown  a  set  that  was  specially  for 
them.  The  insignia  were  featured 
mainly  on  table  models  of  the  per- 
sonal radio  type. 

San  Francisco,  Calif. — Electric  Ap- 
pliance Society  of  Northern  Califor- 
nia conducted  a  20-day  campaign  on 
quality  radios,  with  16  radio  stations 
and  the  utilities  cooperating.  News- 
papers, direct  mail,  contests,  special 
display  cards,  movie  slides,  etc.,  fea- 
tured the  phrase  "You're  There  in 
Person  With  a  His:h  Fidelity  Radio." 


-.„,- 


ST*" 


Home  demonstrations  do  effective  sell- 
ing   for    fine    combinations,    like    this 
RCA  "grand". 


Summer    days    are    still    in    vogue — 
in  Florida  and  South  America!  A  good 
time  for  portable  sets. 


Baraboo,  Wis. — For  selling  radio 
in  rural  areas,  a  dealer  decided  to 
take  a  farmer  along,  to  introduce 
him  to  the  rural  folk  he  did  not 
know.  Besides  the  introduction  to 
various  radio  prospects,  the  radio 
man  got  important  information  on 
the  radio  likes  and  dislikes  of  indi- 
vidual farmers. 

Houston,  Tex.. — Radio  retailers 
got  together  with  their  local  jobber 
in  a  campaign  during  which  some 
10,000  special  keys  were  given  away 
to  those  who  called  at  radio  stores. 
A  few  of  these  keys  were  made  to 


fit  into  radios  which  were  displayed 
as  prizes  in  the  lobbies  of  local 
theaters. 

New  York,  N.  Y. — Letters  which 
recommend  the  store  and  its  service 
were  regularly  shown  in  a  window 
display.  People  stopped  to  look  at 
the  framed  correspondence,  and 
learned  that  the  store  had  dealt  suc- 
cessfully with  radio  troubles  which 
were  similar  to  their  own. 

Jefferson,  Wis. — Farmers  in  this 
area  found  their  radio  dealer  willing 
to  be  "farm  headquarters"  in  cases 
where     visitors     from     the     country 


needed  a  convenient  place  to  relax 
during  the  shopping  day.  The  dealer 
had  discovered  that  farmers  should 
not  be  high-pressured,  and  decided 
to  let  them  take  their  time  to  see  and 
hear  his  new  farm  receivers. 

Miami,  Fla. — Radio  men  arranged 
with  the  local  broadcast  station  to 
stage  their  "spot"  broadcast  pickups 
on  the  sidewalk  in  front  of  radio 
stores.  Interviews  with  the  "man  on 
the  street"  and  similar  audience  par- 
ticipation broadcast  stunts  attracted 
large  crowds  to  the  radio  displays  in 
the  store  windows. 

New  York,  N.  Y. — For  an  excep- 
tional window  display,  a  radio  man 
used  a  2-page  editorial  feature  from 
Radio  Today.  The  feature  was 
blown  up  and  displayed  in  the  win- 
dow, with  ribbons  running  from  the 
points  made  in  the  article  to  appro- 
priate features  of  the  sets  displayed. 
The  title  at  the  top  of  the  pages  said 
"To  Really  Enjoy  Radio  Today — 
Every  Home  Must  Have  a  Quality 
Radio"  used  by  the  dealer  to  sell 
higher-priced  sets. 


12 


Radio  Today 


In  store  selling,  the  "Amer- 
ican way"  is  to  make  the 
customer  as  comfortable  as 
possible. 


Style-conscious  Sue  smiles 
as  she  compares  her  in- 
itialed Stewart-Warner 
Varsity,  with  the  mono- 
gram on  her  bag. 


NOVEL  SALES  IDEAS  SCORE 
TOUCHDOWN  FOR  "VARSITY" 

Bright,  new  selling  ideas  as  color- 
ful as  a  college  football  game  helped 
score  a  touchdown  for  the  Varsity 
radio  set,  Stewart-Warner  reports. 
Already  students  of  210  colleges  and 
150  high  schools  have  bought  sets  in 
their  alma  mater's  colors  and  insignia. 

Dealers  in  college  towns  have 
evolved  special  selling  methods  for 
reaching  this  undergraduate  trade. 
Some  have  loaned  Varsity  sets  to 
fraternities  and  sororities  for  "rush- 
ing" season.  The  prestige  of  "big" 
campus  men  and  women,  such  as  class 
officers,  athletic  coaches,  team  cap- 
tains and  managers,  fraternity  and 
sorority  leaders,  has  been  used  by 
others  to  stimulate  sales.  One  set  is 
given  the  selected  campus  leader,  in 
return  for  which  he  permits  his  name 
to  be  used  in  direct-mail  solicitations 
of  other  students. 

Other  campus  promotions  have  in- 
cluded a  dealer  employing  an  out- 
standingly pretty  and  popular  co-ed 
to  act  as  hostess  for  highly-publicized 
afternoon  showings  of  the  Varsity 
sets  at  which  one  set  is  given  away 
free.     Another   dealer  has   offered   a 


free  school  pennant  to  each  of  the 
first  100  students  to  view  the  Varsity 
set  on  a  particular  day. 

Campus  clothing  shops,  cleaning 
and  pressing  and  laundry  services, 
and  others  who  have  access  to  stu- 
dent residences,  have,  at  some  col- 
leges, agreed  to  boost  the  Varsity  sets 
on  a  5  per  cent  commission  to  be  paid 
on   purchases   when   the   buyer   men- 


tioned the  "salesman's"  name.  Varsity 
sets  are  being  used  in  theatre  lobby 
displays  in  some  college  towns.  Sev- 
eral dealers  have  found  that  silk  pen- 
nants as  premiums  are  good  sales 
stimulators. 

At  the  instance  of  retailers,  some 
campus  groups  have  presented  their 
football  captains  with  Varsity  sets 
between  halves  at  a  big  game.  A 
barrage  of  publicity  has  accompanied 
these  presentations. 


In  home  calls  too,  the 
watchword  is  "Relax 
and  sell."  For  a  radio 
demonstration,  there's 
no     place     like     home. 


December,  1938 


13 


AUTO-RADIO  SALES  BOOM 


independents  have  fine  chance  for  1939  profits 


Auto  buyers  this  year  want  radios 
in  their  cars  and  they  don't  care  too 
much  about  cost.  That's  the  news  a 
check-up  of  agencies  and  installing 
stations  has  revealed.  Even  as  car 
sales  are  promised  to  go  up  in  1939. 
so  will  auto  radio  boom  in  the  year  to 
come. 

This  year,  finger-tip  control  is  the 
thing.  Sets  are  placed  in  the  dash ; 
the  cowl  and  running-board  antennae 
rule  the  roost.  Gone  are  the  roof 
aerials  of  other  years.  And  the  speak- 
er is  not  on  the  ceiling,  not  on  the 
cowl,  but  on  the  instrument  panel  be- 
tween the  speedometer  on  one  side 
and  the  clock  or  other  gadgets  on  the 
other. 

One  auto  radio  manufacturer  re- 
ports a  102  per  cent  attainment  of 
his  quota  for  the  current  year,  and 
that's  an  indication  of  things  to  come. 
New-car  buyers  and  also  those  who 
will  "still  push  the  old  jalopy"  are  be- 
coming more  and  more  radio  con- 
scious. In  the  next  several  weeks, 
manufacturers  will  unveil  their  1939 
auto-radios  for  the  trade.  But,  let's 
look  at  what  the  new  cars  have  to 
offer  in  radio. 

Car  equipment 

Ford  has  a  $49  Philco  sot  with  push- 
button control.  Plymouth  is  offering 
a  specially-built  radio  from  the  same 
manufacturer  at  $52.50.  Hudson  is 
pushing  two  Stewart-Warner  sets :  one 
at  $39  and  a  five-button  fingertip  con- 
trol set  at  $55.  This  is  the  job  that 
has  a  manual  control,  too.  Nash- 
Lafayette  is  offering  two  RCA  sets  at 
$42  and  $59.  Studebaker  has  a  Philco 
for  $42  and  another  at  $65 ;  the  latter 
a  deluxe  model.  Pontiac  has  the  Gen- 
eral Motors  Delco  set  at  $46,  without 
push  button  tuning.  The  fingertip 
control  is  available  in  the  GM  family, 
but  at  a  much  higher  cost. 

Auto  sets  for  the  radio  trade  un- 
doubtedly will  string  along  with  the 
above  line-up.  They  will  be  simpler, 
a  bit  lower-priced  than  last  year.  Cir- 
cuits won't  be  as  fancy;  installation 
will  be  easier,  and  will  take  from  an 
hour  to  an  hour  and  a  half  including 
interference  work.  There  won't  be 
so  many  types  to  clutter  up  a  shop. 
Remote  controls  will  be  fewer. 

Customers  in  the  higher-income 
brackets  don't  hesitate  to  take  a 
chance  on  the  de  luxe  sets.    Those  who 


purchase  the  Chryslers,  Buicks,  Cad- 
illacs, Lincolns  and  oth<ar  quality  cars 
are  all  buying  custom-built  radios  at 
good  prices.  So  the  dealers  say.  And 
even  in  the  lower-priced  field,  the  auto 
buyers  are  going  for  the  more  expen- 
sive sets,  according  to  the  salesmen. 
Several  New  Tork  companies  that  in- 
stall sets  for  major  car  dealers  say 
that  radio  business  is  better  than  ever, 
and  that  price  seems  no  object  in  the 
installation. 

.  As  a  rule,  the  cost  of  auto  radios  is 
lower  than  in  the  1938  models,  but  it 
is  still  higher  than  that  charged  by 
the  radio  dealer.  And  the  "factory  in- 
stallation" gag  doesn't  fool  anyone. 
With  millions  of  motorists  still  driv- 

TOPS  IN  TELEVISION 


i 


._.. 


RCA's  newest  television  antenna  on 
Empire  State  tower,  New  York.  Top 
radiators  transmit  sound  channel;  tor- 
pedo shapes  comprise  doublets  for  the 
picture  transmission.  All  parts  are  ac- 
curately dimensioned,  strongly  rein- 
forced to  stand  high  winds,  and  elec- 
trically-heated to  prevent  ice  forming 
and  reshaping  radiator  characteristics. 


ing  radio-less,  manufacturers  are  pre- 
dicting that  this  branch  will  witness  a 
loud  boom  for  1939.  Soon  it  will  have 
the  universal  acceptance  of  home 
radio. 

Mark  Fisher,  sales  manager  of 
Philco's  auto  radio  division,  says  that 
"the  prospects  of  an  active  buying 
winter  in  the  automotive,  industry 
should  make  possible  for  the  auto 
radio  industry  one  of  the  most  suc- 
cessful selling  periods  in  its  history." 

Big  year  predicted 

And  there's  little  reason  to  doubt 
that.  As  viewed  in  the  1939  crop  of 
cars,  the  new  auto-radio  has  buying 
appeal.  It's  compact,  convenient  and 
in  keeping  with  the  times.  In  years 
past,  dials,  drive  shafts,  etc.,  cluttered 
up  the  steering  wheel.  In  1939,  the 
gear  shift  is  on  the  wheel  and  the 
radio  is  on  the  dash — where  it  belongs. 
The  rest  of  the  front  seat  is  clear  for 
three  passengers. 

Most  of  the  cars  will  be  equipped 
with  the  telescope  type  of  fish-pole  an- 
tenna, but  others  will  have  a  running- 
board  wire.  The  roof  aerial  seems  def- 
initely passe. 

Prices  down    10  per  cent 

The  sets  built  on  contract  and  sold, 
installed,  by  the  car  dealer,  are  con- 
sistently lower  in  price  than  the  1933 
sets.  The  reduction  averages  about 
10  per  cent.  A  few  car  manufactur- 
turers  have  radio  inventories  left  over 
from  the  1938  model  season.  These 
sets  have  been  converted  and  adapted 
to  the  new  cars,  and  with  their  re- 
duced prices,  are  good  buys  for  the 
purchaser  who  does  not  demand  push- 
button tuning. 

Factory  installation 

The  automobile  industry  started 
the  1939  season  with  much  caution. 
Emphasis  was  placed  on  selling  cars 
at  minimum  prices,  which  meant 
leaving  off  accessories.  Consequently 
there  was  very  little  factory  installa- 
tion of  sets  scheduled.  Independent 
radio  dealers  should  benefit  very  con- 
siderably from  this  situation,  for  less 
than  5  per  cent  of  the  new  cars  de- 
livered can  be  expected  to  have  fac- 
tory-installed radio,  and  ear  dealers 
are  neglecting  accessory  sales  in  or- 
der to  move  automobiles.  This  con- 
dition is  temporary,  though,  for  the 
long-range  trend  according  to  De- 
troit gossip  is  toward  more  factory 
radio  installation,  and  the  independ- 
ents should  make  hay  while  the  sun 
shines. 


14 


Radio  Today 


TELEVISION— PRO  &  CON! 

Radio  leaders  outline     video    merits  and  hurdles 


Television  receivers  are  ready,  and 
plans  for  transmitters  go  right  ahead. 
Yet  the  radio  industry  seems  divided 
on  the  subject.  Some  think  television 
is  ready  for  the  public;  others  believe 
it  is  premature,  and  still  others  say 
prospective  buyers  should  be  told  of 
technical  difficulties  yet  to  be  over- 
come. Since  last  month's  announce- 
ment by  RMA  and  RCA,  "Television 
Next  Spring,"  Radio  Today  has  re- 
ceived many  opinions.  We  present 
three  of  them  here  in  an  effort  to  pre- 
sent all  sides  of  the  subject. 

"Practical  now!" 

Says  Frank  D.  Andrea,  pioneer  ra- 
dio manufacturer,  president  of  Andrea 
Radio  Corp.,  "U.  S.  radio  manufactur- 
ers have  given  the  public  the  impres- 
sion that  television  is  still  very  much 
in  the  experimental  stage,  and  that 
they  cannot  expect  practical  home  tele- 
vision for  some  time." 

England  and  the  Continent  are  2  to 
5  years  ahead  of  the  United  States  in 
the  broadcasting  of  scheduled  tele- 
vision programs  and  in  the  produc- 
tion of  television  receivers  for  home 
use.  Yet,  according  to  Mr.  Andrea,  in 
technical  knowledge  we  are  far  ahead 
of  foreign  countries,  and  practical  tele- 
vision has  been  possible  here  for  two 
years. 

"While  adverse  statements  are  being 
published  here,"  continues  Mr.  Andrea, 
"England  is  broadcasting  television 
on  regular  programs  and  showing  spe- 
cial news  events  every  day.  So  great 
is  the  enthusiasm  there  for  television 
reception  that  following  the  recent 
London  radio  show,  English  manufac- 
turers found  themselves  several 
months  behind  in  the  delivery  of  tele- 
vision sets. 

"It  is  true  that  television  will  be 
improved  as  new  technical  knowledge 
comes  to  light,  but  it  is  thoroughly 
practical  at  present.  My  own  com- 
pany is  now  undertaking  the  manu- 
facture of  combined  sight  and  sound 
receivers. 

"The  prices  will  range  from  a  con- 
struction kit,  with  a  5-in.  tube,  for 
experimenters  and  servicemen,  priced 
at  about  $125,  and  a  similar  table 
model  sight  and  sound  set  under  $200, 
to  a  console  with  a  9-in.  tube  for  tele- 
vision sight  and  sound  broadcast  pro- 
gram reception,  and  a  de  luxe  set  with 
a  12-in.  tube  which  will  provide  tele- 
vision and  broadcast  reception  and  an 
automatic  phonograph. 

"In  New  York  City,  two  television 
broadcasting  stations  will  soon  be 
available  for  transmitting  programs, 
and  stations  can  be  erected  very 
quickly  in  other  population  centers. 
Consequently,  if  the  facts  about  tele- 
vision progress  are  made  known,  pub- 
lic demand  will  force  the  start  of  tele- 
vision broadcasting  and  the  release  of 
home  receivers." 

The  case  against  the  sale  of  home 
television   sets  at  this  time  is  stated 


by  P.  V.  Galvin,  president  of  Motorola. 
Mr.  Galvin  fears  publicity  about  tele- 
vision will  hurt  the  sales  of  radio  re- 
ceivers and  says: 

Premature,  incomplete 

"There  is  every  likelihood  that  fur- 
ther technical  development  will  result 
in  rapid  obsolescence  of  television  re- 
ceivers. Only  recently,  the  FCC  asked 
the  television  committee  of  the  Radio 
Manufacturers  Association  to  set  up  a 
series  of  standards  to  guide  them  in 
allocating  television  frequencies  and 
in  governing  other  aspects  of  televi- 
sion. Even  these  standards  have  not 
yet  been  adopted. 

"Leading  companies  in  the  develop- 
ment of  television  are  working  on  a 
standard  which  requires  a  channel 
6,000  kilocycles  wide  for  the  transmis- 
sion and  satisfactory  control  of  a  rea- 
sonably clear  and  detailed  picture. 

"But  there  are  already  'on  the  mar- 
ket' receivers  operating  on  different 
standards.  And  statements  have  ap- 
peared that  other  systems  requiring 
a  different  range  of  frequencies  are 
about  to  be  announced. 

"The  first  radio  sets  which  were  put 
on  the  market  fifteen  years  ago  can 
still  receive  today's  programs  because 
those  programs  are  still  broadcast  on 
a  10  k.c.  channel.  But  a  television  re- 
ceiver designed  to  pick  up  a  program 
on  a  channel  6,000  k.c.  wide  would 
very  likely  be  useless  on  a  channel 
3,000  k.c.  wide. 

"At  the  present  time,  the  most  ad- 
vanced equipment  can  only  transmit 
a  television  broadcast  over  a  range  of 


about  50  miles  from  the  station  and 
on  the  ultra  short  waves  where  the 
following  channels  have  been  assigned: 
from  44.000  to  50,000  k.c;  from  50.000 
to  56,000  k.c,  and  so  on  up  to  84.000  k.c 
"Such  short  waves  will  not  'bend 
around  the  horizon' — they  are  very 
much  like  light  waves.  Experiments 
have  been  carried  on  in  broadcasting 
these  short  waves  since  1931  and  every 
effort  to  increase  their  range  has  been 
made.  Yet  today,  after  the  best  radio 
scientists  in  the  world  have  worked 
on  this  problem  for  almost  ten  years, 
the  range  is  no  greater  than  it  was  at 
the  start. 

Transmitting  costs  high 

"Since  it  doesn't  seem  possible  to  in- 
crease the  range  of  these  short  waves, 
it  will  require  a  television  transmitter 
every  hundred  miles  in  all  directions 
to  cover  the  United  States.  This  means 
a  total  of  some  2,000  transmitting  sta- 
tions." 

Mr.  Galvin  also  asserts  that  the  net- 
work system  would  be  impossible  be- 
cause existing  transmission  lines  could 
not  be  used  to  hook  up  stations.  A 
co-axial  cable  to  cost  $5,000  per  mile 
must  be  used,  and  the  total  cost  would 
be  hundreds  of  millions  of  dollars. 
Programs  will  be  costly  he  finds  and 
impossible  to  produce  in  sufficient 
quantities.  The  price  of  the  receiver 
is  another  vital  factor,  he  points  out. 

"According  to  the  best  estimates," 
says  Mr.  Galvin,  "television  receivers 
will  cost  from  $150.  They  employ  tubes 
at  a  replacement  cost  of  $25  to  $50 
each.     It  took  eight  or  nine  years  to 


"Only  by  public  participation  can  the  art  of  television  be  advanced."     So  says  Dr. 
W.   R.  G.   Baker  of  GE,  pictured  here  with  his   company's  1939  video   receiver. 


December,  1938 


15 


reduce  radio  sets  from  around  .?150  to 
$70.  The  first  so-called  midget  set  at 
$69.50  appeared  in  1930.  There  is  no 
reason  to  believe  that  television  de- 
velopment will  proceed  any  more 
rapidly." 

Britain's  10,000  sets 

The  views  of  General  Electric,  which 
is  constructing  a  large  experimental 
plant  at  Schenectady  as  well  as  de- 
signing receivers  and  transmitters  for 
an  exhibit  at  the  New  York  World's 
Fair,  are  stated  by  Dr.  W.  R.  G.  Baker, 
chairman  of  the  company's  radio  man- 
agement committee.     Says  Dr.  Baker: 

"Probably  the  primary  problem  (in 
television)  is  that  of  educating  the 
public  as  to  what  they  may  expect  at 
this  stage.  It  is  not  easy.  The  aver- 
age man  is  accustomed  to  present-day 
standards  of  radio  and  the  motion 
picture.  He  has  forgotten  he  once 
used  earphones  and  that  not  so  long 
ago  motion  pictures  flickered  badly. 
Too  many  people  believe  that  television 
will  immediately  bring  them  the  events 
of  the  world  as  they  take  place,  in  a 
picture  three  by  four  feet.  Perhaps 
such  a  service  will  eventually  be  pos- 
sible, but  today  the  encouragement  of 
such  an  idea  is  certain  to  react  un- 
favorably on  the  development  of  the 
art. 

"Two  major  technical  limitations 
still  act  as  a  deterrent  to  television  on 
a  national  basis.  First,  we  do  not  yet 
know  how  economically  to  'pipe'  pro- 
grams from  city  to  city.  Hence  tele- 
vision networks  are  not  yet  practic- 
able. 

"Second,  a  fairly  high  power  tele- 
vision transmitter  is  now  limited  to 
a  radius  of  not  more  than  40  or  50 
miles.  Thus,  many  transmitters  will 
be  required  to  provide  a  national  ser- 
vice, and,  considering  the  probable 
cost  of  television  transmitters,  will  at 
first  be  limited  to  areas  where  the 
population  is  dense. 

"And  there  are  problems  of  a  strictly 
consumer  nature.  Television  requires 
the  fixed  attention  of  the  person  view- 
ing the  programs,  as  close  attention 
as  is  required  in  viewing  a  motion 
picture.  In  many  instances  the  room 
lighting  must  be  somewhat  reduced, 
or  at  least  not  much  direct  light  can 
be  permitted  to  fall  on  the  viewing 
surface. 

"The  experience  of  television  in  Eng- 
land, where  it  has  been  commercial- 
ized under  very  favorable  conditions 
for  two  years,  offers  the  best  case  his- 
tory to  study.  The  British  Broadcast- 
ing Company  operates  a  large  tele- 
vision transmitter  in  London,  and 
hence  covers  a  densely  populated  area. 
As  a  result.  British  manufacturers 
have  sold  approximately  10,000  sets  in 
about  two  years.  These  modest  sales 
figures  certainly  give  no  reason  to  ex- 
pect a  sky-rocket  market  in  the  United 
States  during  the  early  period  of  tele- 
vision. 

"Only  by  public  participation  can 
the  art  of  television  be  advanced,  and 
the  system — technical  and  program — 
be  brought  nearer  perfection.  There 
can  be  no  question  of  the  ultimate  ser- 
vice of  television  to  mankind.  It  will 
unquestionably  have  a  far  greater  in- 
fluence than  radio  when  it  has  been 
brought  to  an  equal  state  of  perfec- 
tion, for  in  this  new  art  we  add  sight 
to  sound  and  thus  appeal  to  the  two 
most  powerful  senses." 

16 


FREE  WINDOW  CONCERT  LURES  SHOPPERS  TO  MUSIC  MART 


Like  bees  to  honey  these  shoppers  in  Los  Angeles'  exclusive  West  7th  St.  district 
swarm  to  the  windows  of  Birkel-Richardson  music  shop.  While  they  watch  a 
Capehart  player  in  action,  soothing  strains  pour  from  an  open  panel  in  the  top 

of  the  window. 

preferably  adjacent  to  a  standard 
convenience  outlet,  in  each  6-room 
or  smaller  home;  proportionally  more 
for  larger  houses.  The  rooms  in 
which  such  outlets  are  most  often  in- 
stalled are  the  living  room,  the 
kitchen,  bedrooms  and  the  recreation 
room. 

"Unless  another  method  at  least 
equivalent  is  specified,  a  twisted  pair 
of  wires  for  the  antenna  leads  shall 
be  carried  from  each  outlet  to  the 
attic." 

Headquarters  of  the  Bureau  are  at 
155  E.  44th  Street,  New  York  City. 


OPERA  GUESTS  IN  PAJAMAS 

Soon  after  the  society  folk  of  New 
York  City  had  made  a  big  stir  about 
the  opening  of  the  Metropolitan  Opera 
season,  The  Gramophone  Shop,  a  lo- 
cal record  dealer,  ran  an  exceptional 
ad  on  opera  recordings  in  the  New 
York  Times.  The  ad  appeared  on 
the  music  page  and  was  headed  "To 
The  Opera  In  Pajamas!". 

"Many  of  our  customers  prefer  the 
comfort  of  listening  to  recordings  of 
the  Opera  m  pajamas  rather  than 
attending  the  Met  in  a  boiled  shirt." 
the  ad  went  on.  "For  the  price  of  a 
couple  of  orchestra  seats,  you  can 
have  performances  in  your  own  home, 
with  encores  no  end!  We  ship  rec- 
ords of  all  the  operas  around  the  cor- 
ner or  around  the  world." 

CONCEALED  RADIO  WIRING 
IS  TREND  IN  NEW  HOMES 

The  trend  is  towards  concealed 
radio  wiring.  Just  as  they  balked  at 
unscrewing  a  light  bulb  to  hook  up 
the  vacuum  cleaner,  housewives  now 
want  to  banish  unsightly  antenna  and 
ground  connections  and  put  them  in 
the  wall  where  they  belong. 

Architects  are  providing  for  this 
improvement  in  plans  of  new  homes 
and  radio  men  should  know  the  rules. 
W.  E.  Spraekling,  chairman  of  the 
executive  committee  of  the  National 
Adequate  Wiring  Bureau,  quotes 
these  excerpts  from  the  bureau's  hand- 
book of  interior  wiring  design : 

"At  least  three  outlets  with  radio 
antenna      and     ground     connections. 


WAX  WORTH 
WATCHING 


TOMMY  D0RSEY  and  his  orchestra  playing  Down 
Home  Rag  and  Room  With  a  View,  with  VR  by  Jack 
Leonard — Victor    2609T. 

FATS   WALLER    and   his   Rhythm  playing   Swingin' 

Them    Jingle    Bells    and    A    Porter's  Love    Song    to    a 

Chambermaid,     both    with    VR    by  Waller — Bluebird 
B10016. 

B0SWELL  SISTERS  singing  St.  Louis  Blues  and 
Trav'lin'    All    Alone — Vocalion   4495. 

DICK  TODD  singing  When  Paw  Was  Courtin'  Maw 
and  You're  the  Only  Star  (Voeadenee) — Bluebird 
B10034. 

BOB  CROSBY  and  his  Bob  Cats  playing  Five  Point 
Blues,  featuring  trumpeter  Yank  Lawson  and  Big  Foot 
Jump,    featuring   pianist   Bob    Zurke — Decca   210S. 

ELLA  LOGAN  and  H0AGY  CARMICHAEL  with 
Perry  Botkin  and  his  orchestra  singing  Two  Sleepy 
People  from  "Thanks  for  the  Memory."  and  New 
Orleans — Brunswick    S250. 

AL  DONAHUE  and  his  orchestra  playing  When  Paw 
Was  Courtin'  Maw,  with  VC  by  Paula  Kelly  and 
Donahue,  and  Button  Button,  with  VC  by  Miss  Kelly 
— Vocalion   4476. 

CAB  CALLOWAY  and  his  orchestra  playing  F.  D.  R. 
Jones,  with  VC  by  Calloway,  and  Angels  With  Dirty 
Faces,    with   VC    by   June   Richmond — Vocalion    449S. 

CHICK  WEBB  and  his  orchestra  playing  F.  D.  R. 
Jones  and  I  Love  Each  Move  You  Make,  both  with  VC 
by  Ella  Fitzgerald — Decca  2105. 

SIDNEY  "POPS"  BECHET  and  Noble  Sissle's 
Swingsters  playing  Blackstick  and  When  the  Sun  Sets 
Down    South — Decca    2129. 


Radio  Today 


HERE'S  WHAT  YOU'RE 
LOOKING  FOR 

There  ought  to  be  more  people  like 
Harry  Scott,  of  Milwaukee.  Then  it 
would  be  a  fine,  fine  world  for  radio 
dealers  to  live  in.  Mr.  Scott  bought 
ten  radios  for  his  office,  and  has  a 
receiver  in  every  room  in  his  house. 
He  even  has  a  nearby  set  turned  on 
while  he  shaves,  and  has  his  guest 
rooms  equipped  with  radios. 

The  lucky  dealer  who  got  hold  of 
Scott  in  the  first  place  must  have 
made   a   killing;   now  he   is  probably 


scribbling  re-orders  to  bis  jobber. 
More  than  that,  Scott  owns  enough 
radio  equipment  to  represent  a  nice 
slice  of  future  business  for  the  radio 
serviceman.  He's  an  advertising 
agency  executive,  and  takes  no 
chances  about  missing  his  shows  on 
the  air. 

Maybe  the  dealer  organizations  of 
the  country  want  to  make  an  example 
out  of  the  Milwaukee  chap,  and  point 
out  to  all  other  admen  that  here  is 
the  happiest,  brightest,  most  efficient 
guy  in  his  profession.  Why?  Because 
he  practically  bought  out  a  radio 
dealer. 


ALL-GLASS  RADIO  TUBES 

Loktal  type  tubes  having  no  base 
set    new    performance    standards 


Eevolutionary  new  tubes,  called 
Loktal  tubes,  which  eliminate  the  or- 
dinary tube-bases  are  being  introduced 
by  Philco  for  the  first  time  in  the  new 
Transitone  models,  according  to  an 
announcement  made  by  Sayre  M. 
Eamsdell,  Philco  vice  president. 

Nothing  like  these  Loktal  tubes  has 
been  used  in  radio  sets  before.  Much 
smaller  in  size  than  the  ordinary  tube, 
some  of  them  measuring  only  2%"  in 
height,  they  are  without  a  base  and 
are  the  first  tubes  to  be  all  tube. 

The  lower  portion  of  the  bulb  is 
simply  fitted  with  a  metallic  shell 
holding  a  small  metal  guide-pin  which 
accompishes  the  locking-in  action  in 
the  socket. 

The  Loktal  tubes  made  it  possible 


for  the  new  Transitone  models  to  be 
the  first  compact-type  radios  ever  ap- 
proved by  the  Underwriters  Labora- 
tories, Inc.,  as  being  safe  from  fire 
and  shock.  They  consume  only  half 
the  filament  current  of  tubes  cus- 
tomarily used  in  small  size  compacts, 
with  a  resulting  tremendous  reduction 
in  the  amount  of  heat  generated  by 
the  set.  Due  to  the  use  of  the  Loktal 
tube,  it  was  possible  to  design  circuits 
for  the  new  Transitone  radios  whereby 
all  resistance  was  built  into  the  set 
itself,  thus  enabling  them  to  avoid 
the  practice  of  using  the  socket  cord 
wire  for  resistance. 

Before  the  development  of  these 
tubes,  called  Loktal  tubes,  fire  under- 
writers  have   refused   to    approve   as 


safe  any  compact-type  radio  because 
the  tubes  used  for  their  operation  rep- 
resented a  fire  menace  due  to  the  seri- 
ous overheating  of  the  radio. 

Additional  novel  features  of  the 
Loktal  tubes  include  prongs  different 
from  those  used  in  the  conventional 
type  of  tube,  thus  calling  for  a  new 
type  of  socket.  Troublesome  cap  con- 
nections are  eliminated  through  the 
use  of  much  shorter  grid  leads,  made 
possible  by  the  fact  that  they  connect 
to  one  of  the  pins  at  the  bottom  of 
the  tube. 

The  small  dimensions  of  these  new 
tubes  which  are  being  made  available 
to  the  entire  industry  makes  possible 
the  building  of  compact  radios  which 
offer  the  facilities  and  performance, 
as  well  as  the  safety,  of  radios  many 
times  their  size. 

U.S.  PROGRAMS  FOR 
LATIN  AMERICA 

A  new  short-wave  antenna  which 
will  swing  radio  beams  over  South 
America  from  one  language  to  an- 
other at  the  touch  of  a  button  and  in- 
crease signal  strength  is  being  com- 
pleted by  NBC. 

Heretofore  either  only  one  broad 
beam  was  used  to  cover  all  South 
America  or  two  antenna  systems  with 
sharp  beams  were  employed.  In  the 
latter  case  time  was  lost  in  switching 
from  that  broadcasting  in  Portuguese 
to  the  beam  carrying  Spanish  pro- 
grams. Under  the  new  system  a  beam 
carrying  Portuguese-language  broad- 
cast to  Bio  de  Janeiro  may  be  moved 
almost  instantaneously  to  the  west, 
where  it  will  focus  a  Spanish  program 
along  a  line  extending  from  New 
York  to  Buenos  Aires. 


The  new  "loktal"  or  locking  tubes — all-glass,  and  without  bases — as  developed  by  Corning  Glass  Co.  and  Hygrade-Sylvania, 

and  used  in  new  Philco  Transitone  chassis. 


December,  1938 


17 


Crosley  receivers 

*  New  additions  to  the  Crosley 
line  are:  C598A  Vanity  model  list- 
ing at  $9.99;  588A  5-tube  superhet 
$12.99;  718P  console  listing  at 
$49.95;  668M  phonograph  combina- 
tion with  6  tubes — $59.95.  Crosley 
Radio  Corp.,  1329  Arlington  St., 
Cincinnati,  Ohio — Radio  Today. 


Ultra-modern  compacts 

*  AC-DC  superhet  receiver  with 
five  tubes  and  a  plug-in  resistor. 
Four  choices  of  color — plastic  cab- 
inet. With  or  without  push  button 
tuning.  Dual-band  reception,  includ- 
ing 16,  19,  25,  31,  49  meter  bands. 
Model  96X-11  in  walnut— list  $19.95. 
Without  P.B.  tuning— $14.95.  RCA 
Mfg.  Co.,  Front  &  Cooper  Sts.,  Cam- 
den, N.  J. — Radio  Today. 


Trim-Mast  antenna 

*  Vertical  antenna  for  vent  or 
wall  mounting.  Mast  is  of  metal 
tubing  in  sections  which  fit  together. 
Comes  complete  with  all  necessary 
wire,  brackets,  etc.  Available  in 
regular  or  noise-reducing  types — lat- 
ter licensed  by  A.  A.  &  K.  Charles 
Avnet  Co.,  156  Chambers  St.,  New 
York,  N.  Y. — Radio  Today. 


Hotel  radio 

*  AC-DC  type  superheterodyne 
radio  set  for  hospitals,  apartments, 
offices,  etc.  Requires  no  antenna  or 
ground  connections.  Shielded  against 
local  electrical  interference.  5-inch 
speaker  unit,  bakelite  cabinet  with 
carrying  handle.  5-tubes  plus  bal- 
last. Model  6D315  — list  $19.95. 
Zenith  Radio  Corp.,  6001  Dickens 
Ave.,  Chicago,   111. — Radio  Today. 


U.  S.  RADIO  IS  FIRST  II 


Ken-Rad  single-ended  tubes 

•A:  Line  of  metal  tubes  with  the 
control-grid  lead  brought  out  to  the 
base  instead  of  the  top.  Lower  in- 
put and  output  capacitances.  Tubes 
similar  to  older  type — designated  by 
the  addition  of  an  "s"  in  the  type 
number.  Types  available  are:  6sJ7, 
6sK7,  6sQ7,  6sF5.  Kend-Rad  Tube 
and  Lamp  Corp.,  Owensboro,  Ky. — 
Radio  Today. 


Philco  console 

*  6-tube  receiver  with  push-but- 
ton tuning  for  8  stations.  Inclined 
control  panel,  cathedral  speaker. 
Covers  standard  and  short-wave 
broadcasts.  Model  31XF— list  $69.95. 
Philco  Radio  &  Television  Corp., 
Tioga  &  C  Sts.,  Philadelphia,  Pa. — 
Radio  Today. 


Wireless  record  player 

*  Record  player  requiring  no 
connections  to  radio  set.  Radio  set 
tuned  to  frequency  of  oscillator  in 
record  player.  Device  operates  with 
any  radio.  Handles  up  to  12-inch 
records.  Turntable  speed  of  78 
r.p.m.  Wrinkle-finish  metal  case. 
Radolek  Co.,  601  W.  Randolph  St., 
Chicago,  111. — Radio  Today. 

Dual  diversity  receiver 

*  Communications  type  receiver 
for  diversity  reception  from  2  an- 
tennas. Greatly  reduces  fading. 
Set  has  two  R.F.  and  two  I.F.  chan- 
nels which  may  be  used  separately 
or  in  combination.  Receiver  tunes 
from  540  Kc.  to  46  megacycles,  with 
push-button  selection  of  the  bands. 
Total  of  25  tubes  employed.  Halli- 
crafters,  Inc.,  211  S.  Indiana  Ave., 
Chicago,  111. — Radio  Today. 


Latest 


news    oJ 


1    HilMHMli 

1    IIHHhiHi 

1    iiiitltffffi 

1 

Film  titler 

*  Automatic  film  titler  for  use 
with  8  and  16  mm.  movie  cameras. 
Capable  of  setting  up  3  rows  of  12 
characters  each.  Uses  36  small 
wheels,  each  operating  a  continu- 
ous ribbon  with  42  characters,  in- 
cluding numbers  and  punctuation 
marks.  Letters  photograph  in  a  bril- 
liant white  against  a  black  back- 
ground. List  $3.95.  Universal  Cam- 
era Corp.,  28  W.  23rd  St.,  New  York, 
N.  Y. — Radio  Today. 


Push-button  converter 

*  Push-button  tuning  unit  for 
use  in  any  receiver  having  a  455-465 
KC  I.F.  Uses  2A7  or  6A7  converter 
tube.  Tunes  to  7  stations.  Receiver 
R.F.  circuits  not  used  for  push- 
button tuning.  Power  supply  ob- 
tained from  receiver.  Iron-core  type 
coils  with  single  adjustment  fpr 
each  station.  Type  9-1004.  Meissner 
Mfg.  Co.,  Mt.  Carmel,  111.— Radio 
Today. 


G-E  superhet 

*  Table  type  receiver  with  au- 
tomatic tuning  for  5  stations.  Tunes 
540-1750  KC  on  manual.  I.F.  wave- 
trap.  5-inch  dynamic  speaker.  4 
tubes  plus  ballast — 2  watts  output. 
Model  GD-51— list  $19.95.  Also  avail- 
able in  AC  model  known  as  G-51. 
General  Electric  Co.,  1285  Boston 
Ave.,  Bridgeport,  Conn. — Radio  To- 
day. 


18 


Radio  Today 


UALITY  AND  ECONOMY 


oducts    from    manufacturers 


Television  receiver 

*  21-tube  television  receiver  hav- 
ing black  and  white  picture  measur- 
ing a  full  8  x  10  inches.  Uses  14- 
inch  cathode-ray  tube.  Built  to  han- 
dle television  in  accordance  with 
present  R.M.A.  standards,  either 
single  or  double  side-band  modula- 
tion. Single  tuning  control  for  sight 
and  sound.  Operates  with  di-pole 
antenna.  Table  model  —  list  $395, 
console — $445.  Allen  B.  DuMont 
Labs.,  Passaic,  N.  J. — Radio  Today. 


I 


Marine  radio 

*  Radiotelephone  transmitter  for 
use  on  small  yachts  and  boats.  Re- 
ceiver, transmitter,  and  power  unit 
complete  in  metal  cabinet.  Easy  to 
operate — no  technical  knowledge 
needed.  Jefferson-Travis  Radio  Mfg. 
Co.,  198  Milburn  Ave.,  Baldwin,  N. 
Y. — Radio  Today. 


Low-cost  Victrola 

*  Phonograph  combination  with 
6-tube  chassis.  Receiver  has  push- 
button tuning  and  horizontal  dial. 
Self-starting  phonograph  motor,  au- 
tomatic stop,  crystal  pickup.  Wrap- 
around  walnut  cabinet  with   band- 


ings of  stripe  walnut  veneer.  Model 
0-115— list  $59.95.  RCA  Mfg.  Co., 
Front  &  Cooper  Sts.,  Camden,  N.  J. 
— Radio  Today. 


Flower  cart  radio 

*  A  mirror-metal  flower  cart  for 
fresh  or  artificial  flowers  is  the  un- 
usual cabinet  for  a  5-tube  superhet 
AC-DC  radio.  Beam  power  output 
tube,  AVC,  dynamic  speaker.  List 
$24.50.  Emron  Radio  Div.,  Creative 
Art  Products  Co.,  1140  Broadway, 
New  York,  N.  Y. — Radio  Today. 


Mahogany  corner  console 

*  All-wave  receiver  with  push- 
button tuning  for  8  stations.  Cath- 
ode-ray indicator  for  manual  tun- 
ing. Two-tone  etched  bronze  dial. 
Labyrinth  audio  system  with  class 
A  amplification.  Model  340-Y — list 
$132.50.  Stromberg-Carlson  Tele- 
phone Mfg.  Co.,  Rochester,  N.  Y. — 
Radio  Today. 


World-wide  portable 

~k  Portable-type  superheterodyne 
receiver  for  world-wide  use.  Covers 
standard  broadcast,  shortwave,  and 
European  long  wave  bands.  Oper- 
ates on  AC-DC,  110,  160  and  220 
volts.  8-tube  circuit  —  dynamic 
speaker.  Choice  of  portable  type 
carrying  cases.  Model  25-A.  cloth 
covered— list  $64.50.  Cowhide — 
$74.50.  Portomatic  Corp.,  1013 
Madison  Ave.,  New  York,  N.  Y. — 
Radio  Today. 


Heavy-duty  Wincharger 

*  6-volt  wind-driven  battery 
charger  for  farms  and  remote  loca- 
tions. Unit  delivers  up  to  25  am- 
peres. Starts  charging  at  a  wind 
velocity  of  6  miles  per  hour.  Larger 
and  more  efficient  generator.  "Win- 
charger  Corp.,  Sioux  City,  Iowa — 
Radio  Today. 


Recording  machine 

*  Wide-range  instantaneous  re- 
cording machine.  Easy  to  operate 
- — ruggedly  constructed  to  high  pre- 
cision standards.  High-fidelity  play- 
back. Overhead  feed  carries  record- 
ing head.  Allied  Recording  Prod- 
ucts Co.,  126  W.  46th  St.,  New  York, 
N.  Y. — Radio  Today. 


Transitone  receivers 

*  Line  of  streamlined  compact 
receivers  employing  new  Loktal 
tubes.  Model  TP-10,  a  5-tube  super- 
het is  illustrated  at  top.  Tunes  550- 
1700  kc.  Below  is  the  TP-5,  a 
5-tube  receiver  with  push-button 
tuning  for  5  stations.  Available  in 
white  or  brown  plastic.  Same 
chassis  without  push  buttons  avail- 
able in  a  similar  cabinet.  Philco 
Radio  &  Television  Corp.,  Tioga  & 
C  Sts.,  Philadelphia,  Pa.— Radio 
Today. 


Photoelectric  control 

*  Inexpensive  photo-cell  control 
for  regulating,  measuring,  sorting, 
counting,  controlling,  signaling,  etc. 
Operates  from  110  volts  AC.  Im- 
pulses required  are  1/20  of  a  second 
between  operations.  Uses  standard 
tubes.  Supplied  complete  with  light 
source  and  lens.  Model  50.  United 
Cinephone  Corp.,  Electronic  Control 
Div.,  43-37  33rd  St.,  Long  Island 
City,  L.  I.,  N.  Y.— Radio  Today. 


December,  1938 


19 


Crosley  receivers 
*     New  additions   I"  I'"'   '  '"  I1 
lirl,  „,;   C698A  Vanity  model  I 

ng  at  19.99:  r,s«A  5-tube  lerbet 

j] v  .,.,       7I«I'     ■' '!'■     Ii«»'ne     "I 

MB96-   668M  phonograph  i ps 

'ton  win.  i.  tubas  109.98  '  roile] 
Radio  Corp.,  1329  Arlington  St., 
Clncl Ohio    Radio  -Today. 


Ultra-modern  compacts 

*       AC  hi'    :a. peril"!     receiver    Willi 

nv.»  tub»«  an lug-in   rj  I  to 

„,„„.  ,.i„,!,,,,  ui  i'i.i.m  ""f  '•„;■; , 

,m,t        Willi    LI'    without    1'1'Kl'     "","" 

i „„;,„.     Dual-band  reoeptlon,  inoiuu 
,.    i;    19,  26,  81,  49  meter  ids. 

Ko'drt "Sftg'M* 

roitboul  P  n  tunlni  SM-9B.  '''  x 
m,'  Co.,  Fi •  Cooper  SU,  Cam- 
dan,  n.  .1.    Radio  Today. 


IIV 


Trim-Mast  antenna 

*  Vertical  antenna  tor  venl  or 
wail  mounting.  Maal  la  ol  metal 
tublns  In  Beotlona  which  m  together, 
,.,„„,.  complete  with  all  neoeiBarj 
„,,„  Inaekels,  fli'  Unliable  In 
regular  or  nolae  reducing  types  lat- 
ter lloenaed  by  \  4  8  K-  Charles 
j.vngl  oo„  188  Chambera  Bt,  Mew 
jTorta,  N.  1      Radio  Today, 


l.  S.  RADIO  IS  FIRST  1 


Ken-Rad  single-ended  tubes 

*    Line  of  metal  tubes  with  t  e 

,.,*  J/;,,,  lead  brougot  out  tc,  the 

baas  »H  SSnceV  Tubes 

S  add  tC  o?  a?  "s"  to  the  type 

ElLm  Corp.,  Owenaboro,  Ky.- 
k  m,ii,  Today, 


Hotel  radio 

i,    \c  DC   type  iup»rh«t( lyns 

rn.ilo  sot  tor  hoapltala,  apartmenta, 
,,,„,,.,  ,.,,.  Requires  no  antenna  or 
ground  aonnactloni.  Shielded  again 
local  aleatrtoal  Interference.  5-lnoh 
ansakar  unit,  bakellte  cabinet  win 
,..,,,,,„..■.  handle,  5-tuhas  plus  bnl- 
gaT  Model  8DS16  Ital  119.98. 
Benito  Radio  Corp.,  WM  piokeni 
avo.,  Obioago.  in.    Ranw  Today. 

18 


Philco  consolt 

*  d-tube  receiver  with  push-but- 
lon  tuning  for  8  stations.  Inclined 
control    panel,    cathedral    speaker. 

•over:,      'landnrd      ami      short-wa». 

broadoaatB.  Model  JBW*  *•  r9D5' 
Philco  Radio  &  Television  Corp., 
Tioga  &  C  Sis.,  Philadelphia,  Pa.— 
Radio  Today. 


Wireless  record  player 


*  Record  player  requiring  no 
oonneotlona  to  radio  set.  Radio  set 
tuned  to  frequency  of  osoillator  in 

record  player.    Device  operates  with 

any    radio.     Handles    op    10    12-lnrh 

reoorda.  Turntable  speed  of  78 
r  p.m.  Wrtnklo-iinish  metal  case. 
Uadolek  CO.,  601    W*.  Randolph   St, 

Chicago,  111.-  Radio  Today, 

Dual  diversity  receiver 

•  Communications  type  receiver 
for  diversity  reception  from  2  an- 
tennas. Greatly  reduces  fading. 
Sot  has  two  R.F.  and  two  I.P.  chan- 
nels which  may  be  used  separately 
or  In  combination.  Receiver  tunes 
from  640  Kc.  to  46  megacycles,  with 
push-button  selection  of  the  hands. 
Total  of  26  tubes  employed.  Halll- 
craftevs.  Inc..  211  S.  Indiana  Ave., 
Chicago.  111.— Radio  TODAY, 


Latest    news    of   radi( 


Film  titler 

ir  Automatic  film  titler  for  use 
with  8  and  16  mm.  movie  cameras. 
Capable  of  setting  up  3  rows  of  12 
characters  each.  Uses  36  small 
wheels,  each  operating  a  continu- 
ous ribbon  with  42  characters,  in- 
cluding numbers  and  punctuation 
marks.  Letters  photograph  in  a  bril- 
liant white  against  a  black  back- 
ground. List  $3.95.  Universal  Cam- 
era Corp.,  28  W.  23rd  St.,  New  York, 
N.  Y  —  Radio  Today. 


QUALITY  AND  ECONOMY 


products    from    manufacturers 


Push-button  converter 

*  Push-button  tuning  unit  for 
use  in  any  receiver  having  a  455-465 
KC  IF?  Uses  2A7  or  6A7  converter 
uhe.  Tunes  to  7  stations.  Receive 
R.F.  circuits  not  used  for  push 
button  tuning.  Power  rort  <* 
tained  from  receiver.  Iron-core  tyi 
coils  with  single  adjustment ^  tor 
each  station.  Type  9-1004.  Meaner 
Mfg.  Co.,  Mt.  Carmel,  111.— kadi* 
Today. 


G-E  superhet 

*    Table  type  receiver  with  » 
tomatic  tuning  for  6  stations.         ^ 
540-1750  KC  on  manual.  i.r-         4 
trap.     6-inch   dynamic   speaker- 
tubes  plus  ballast-2  watts  < mp 
Model  GD-61-list  $19.95.  ^f%i. 
able  In  AC  model  •ino1w°,aBoston 
General   Electric   Co..   1Z«?         to- 
Ave.,  Bridgeport,  Conn.— «" 

DAY. 


Radio 


Today 


Television  receiver 

*  21-tube  television  receiver  hav- 
ing black  and  white  picture  measur- 
ing a  full  8x10  inches.  Uses  14- 
inch  cathode-ray  tube.  Built  to  han- 
dle television  in  accordance  with 
present  R.M.A.  standards,  either 
single  or  double  side-band  modula- 
tion. Single  tuning  control  for  sight 
and  sound.  Operates  with  dl-pole 
antenna.  Table  model  —  list  $395, 
console  —  $446.  Allen  B.  DuMont 
Labs.,  Passaic,  N.  J.— Rapio  Today. 


Marine  radio 

*  Radiotelephone  transmitter  for 
use  on  small  yachts  and  boats.  Re- 
ceiver, transmitter,  and  power  unit 
complete  in  metal  cabinet.  Easy  to 
operate — no  technical  knowledge 
needed.  Jefferson-Travis  Radio  Mfg. 
Co..  198  Milburn  Ave.,  Baldwin.  N. 
V. — Radio  Today. 


Low-cost  Victrola 

*  Phonograph  combination  with 
6-tube  chassis.  Receiver  has  push- 
button tuning  and  horizontal  dial. 
Self-starting  phonograph  motor,  au- 
tomatic stop,  crystal  pickup.  Wrap- 
around  walnut  cabinet  with   band- 

December,  1938 


Ings  of  stripe  walnut   veoe,  . 
U-115— list   169.96      RCA    HI 

Front  &  Cooper  Sis.  Cam, leu.   N    .1 

—Radio  Today. 

Flower  cart  radio 

*  A  mirror-metal  Bower  eart  for 
fresh  or  artificial  Bowers  Is  the  un- 
usual cabinet  for  a  5-tube  superhel 
\i  In'  radio.  Beam  power  output 
tube,  AVC,  dynamic  speaker.  List 
$24.50.  Emron  Radio  Dtv.,  I 
Art  Products  Co,  1141)  Broadway, 
New  York.  N.  Y,    Radio  Today. 


%Jf 


Mahogany  corner  console 

*  All-wave  receiver  with  push- 
button tuning  for  8  stations.  Cath- 
ode-ray indicator  for  manual  tun- 
ing. Two-tone  etched  bronze  dial. 
Labyrinth  audio  system  with  clans 
A  amplification.  Modol  340-Y— list 
$132.50.  Stroniherg-Carlson  Tele- 
phone Mfg.  Co.,  X.  It— 
Radio  Today, 


World-wide  portable 

•  Portable-type  superheterodyne 
receiver  for  world-wide  use.  Covers 
standard  broadcast,  shortwave,  and 
European  long  wave  bands.  Oper- 
ates on  AC-DC,  110.  160  and  220 
volts.  8-tube  circuit  —  dynamic 
speaker.  Choice  of  portable  type 
carrying  cases.  Model  25-A.  Cloth 
covered— list  $64.50.  Cowhide— 
$74.50.  Portomatlc  Corp..  1013 
Madison  Ave.  New  York.  N.  Y.— 
Radio  Today. 


Heavy-duty  Wincharger 
*    g-vatt     wind-driven 

for  farms  and   remote  loea- 

B     wind 

and    moi 

charter    Corp.    SlOUX    City.    Iowa 

Radio  Today. 


Recording  machine 

•    Wid 
cording  machine     Baay  to  operate 

i 

Olslon  standards.   High  lldelln    plaj 

record- 
ing   head.      Allied    Rl 

I'll    \\       I,  .11,       .   .    N,  R    \,ol,. 

n,  v     Radio  Tqdai 


Transitone  receivers 

*    l.i r     it,. ,,ii, Hi,,-, i  compact 

Jodel  TP  10, 
Del  I-.  Illustrated  al  top,  1  - 
1700    kc.      Below    Is     the 

(■tube    receiver    with    pushbutton 
tuning  for  r,  1 1 

whil '      1... 

...Ilii. ,..!     | 

able  in  Philco 

Radio 

Philadelphia,    Pa     Radio 


Photoelectric  control 
*     Inexpensive  pboto-oell 
for    regul  orlng.   sorting. 

controlling,  signal'- 
Operates   from    110   volts    AC.      Im 
pulses  require,; 

between  operations.  Uses  standard 
tubes.  Bupplled  oomplete  with  IlKlit 
source  and  lens.  Model  60  United 
Clneplo, 

Dlv„  43-37  33rd  St.,  Long  Island 
City,  L.   I,  N.   Y.— Radio    I 


19 


Multi-meter  and  analyzer 

*  Push-button  type  multi-range 
meter  having  both  1,000  and  25,000 
ohms-per-volt  sensitivity.  Current 
0/.07/.7/7/35/140/350/1.4M/14M  mil- 
liamperes.  Voltage  0/3.5/7/35/140- 
/350/700/1400.  Resistance  0/500/- 
5M/50M/500M/5meg/50meg  ohms. 
Analyzer  unit  separate.  Provides 
current  and  voltage  measurements 
in  all  circuits.  Models  592  and  593. 
Supreme  Instruments  Corp.,  Green- 
wood, Miss. — Radio  Today. 


Sprague  paper  condensers 

■*•  600-volt  condensers  in  alumi- 
num cans  for  replacement  work  in 
receivers  and  amplifiers.  Have  ap- 
pearance of  standard  electrolytics. 
Capacities  of  4,  8m  4-4,  8-8  mfd. 
Negligible  leakage  and  power  factor 
— no  polarity  to  observe.  Type  DR  8 
mfd. — list  $1.35.  Sprague  Products 
Co.,  North  Adams,  Mass. — Radio  To- 
day. 


Sound  projector 

*  All-steel  sound-projector  for 
use  with  6-inch  speaker  units.  De- 
signed especially  for  use  with  call 
and  paging  systems.  9%-inch  flare 
with  10-inch  bell.  Baked  art-metal 
finish.  Fixture  fits  %-inch  pipe. 
Model  J-6— list  $7.50.  Kainer  &  Co., 
761  W.  Lexington  St.,  Chicago,  111.— 
Radio  Today. 


Dumont  filter  condensers 

*  Line  of  700-volt  electrolytic 
condensers  for  filter  circuits  in  re- 
ceivers and  amplifiers.  Long  life 
combined  with  self-healing  proper- 
ties. Available  in  can  and  cardboard 
containers.  Dumont  Electric  Corp., 
514  Broadway,  New  York,  N.  Y. — 
Radio  Today. 


AMERICAN  RADIO  PRODUCT! 


Record  cleaner 

*  A  companion  to  the  Nash 
Record  Lube.  The  record  cleaner 
removes  dust,  dirt,  and  various 
gritty  particles  from  the  grooves  of 
all  makes  of  records  and  assures 
perfect  reproduction.  Improves  tone 
of  old  records.  Nash  Radio  Prod- 
ucts Co.,  5437  Lisette  Ave.,  St. 
Louis,  Mo. — Radio  Today. 


Lafayette  phonograph 

*  Electric  phonograph  with  6- 
tube  amplifier  having  automatic* vol- 
ume expansion.  Automatic  record 
changer  plays  eight  10-inch  or  12- 
inch  records.  12-inch  high-fidelity 
speaker — 13-watts  output.  Walnut 
console.  Record  storage  compart- 
ments on  both  sides.  Wholesale 
Radio  Service  Co.,  100  Sixth  Ave., 
New  York,  N.  Y. — Radio  Today. 


«£SX„ 


Portable  sound  system 

*  Low-cost  portable  sound  sys- 
tem having  12-watt  output.  Velocity 
type  microphone,  2  P.M.  type  speak- 
ers each  with  24  feet  of  cable.  All 
units  housed  in  a  single  case  — 
weighs  only  43  pounds.  Model  PG- 
112-B— List  $149.  RCA  Mfg.  Co., 
Front  St.,  Camden,  N.  J. — Radio 
Today. 

Elkay  communicator 

*  Low-cost  wired  type  intercom- 
municating system.  Provides  two- 
way  communication.  AC-DC  opera- 
tion. Supplied  with  50  feet  of  wire 
and  tubes.  Net  $6.50  per  pair.  El- 
kay Mfg.  Corp.,  200  Fifth  Ave.,  New 
York,  N.  Y. — Radio  Today. 


Quietone  interference  filters 

*  Line  of  7  types  of  filter  units 
for  eliminating  radio  noises  trans- 
mitted via  the  power  line.  Both  ca- 
pacitive  and  capacitive-inductive 
units  are  available.  Units  should 
preferably  be  installed  at  the  inter- 
fering electrical  device.  In  this 
way  noise  radiation  to  the  antenna 
is  minimized.  Technical  data  will 
be  supplied  on  application.  Cornell- 
Dubilier  Corp.,  S.  Plainfield,  N.  J. — 
Radio  Today. 


18-watt  amplifier 

*  Sound  amplifier  with  18-watts 
undistorted  power  output.  4  micro- 
phone channels,  automatic  volume 
control  and  expansion.  2  phono  in- 
puts, tone  compensation,  speaker  se- 
lector, volume  level  meter.  Choice  of 
accessories  available.  Allied  Radio 
Corp.,  833  W.  Jackson  Blvd.,  Chi- 
cago, 111. — Radio  Today. 


Enclosed  relay  rack 

•  Modernistically-styled  cabinet 
type  rack  for  handling  standard  19- 
inch  wide  relay-rack  assemblies. 
Rounded  corners.  Top  and  bottom 
trimmed  with  chromium  molding. 
Furnished  in  following  sizes:  42, 
66%,  82%  inches  high.  Finished 
in  gray  or  black  ripple.  Par-Metal 
Products  Co.,  35-25  41st  St.,  Long 
Island  City,  L.  I.,  N.  Y.— Radio 
Today. 


20 


Radio  Today 


EAD  ALL  THE  WORLD 


Bullet  microphone 

■*•  Chrome-plated  microphone  us- 
ing moving-coil  type  unit.  Available 
in  high  or  low  impedance.  Supplied 
with  25-feet  of  shielded  cable.  Model 
MK-31.  Tilton  Electric  Co.,  15  E. 
26th  St.,  New  York,  N.  Y—  Radio 
Today. 


Tube  tester 

*  Low-priced  tube  checker  with 
large  direct-reading  meter.  Line 
voltage  adjustment.  External  leak- 
age and  by-pass  condenser  tests. 
Hot  leakage  tests  of  tubes.  Black 
wrinkle-finished  steel  case.  Model 
CP— Net  $13.95.  Million  Radio  & 
Television  Labs.,  685  W.  Ohio  St., 
Chicago,  111. — Radio  Today. 


1939  running  board  insulators 

*  Insulators  for  running  boards 
of  1939  Buicks  and  Oldsmobiles. 
Illustrated  is  a  complete  kit  for 
Buicks  using  bakelite  insulation, 
low-loss  lead-in,  and  interconnect- 
ing leads.  Complete  kit  for  both 
Buick  running  boards — type  3011 — 
list  $5.50.  J.  F.  D.  Mfg.  Co.,  4111 
Ft.  Hamilton  Pky.,  Brooklyn,  N.  Y. 
— Radio  Today. 


Crystal  headphone 

*  Communications  type  of  head- 
phones. Extremely  light  in  weight. 
Aluminum  case.  Hermetically-sealed 
crystal  element.  Headphones  en- 
closed in  molded-rubber  ear  pieces 
which  improve  ear  seal  and  low- 
frequency  response.  Supplied  with 
5-foot  cord.  Model  BJ.  Brush  De- 
velopment Co.,  3322  Perkins  Ave., 
Cleveland,  Ohio — Radio  Today. 


Multi-range  ohmmeter 

*  High  -  sensitivity  ohmmeter 
having  ranges  from  .2  ohm  to  300 
megohms.  Meter  requires  only  50 
microamps  for  full-scale  deflection. 
Has  internal  AC-operated  power  sup- 
ply to  supply  125  volts  for  the  300 
megohm  range.  Will  measure  con- 
denser leakage  resistance.  Model 
763.  Weston  Electrical  Instrument 
Corp.,  Newark,  N.  J. — Radio  Today. 


Speech  amplifier 

*  Foundation  kit  for  the  con- 
struction of  a  modern  amateur 
speech  amplifier.  Push-pull  2A3  out- 
put stage.  Automatic  over-modula- 
tion control  circuit.  Supplied  with 
500  ohm,  multi-match,  or  universal 
driver  transformer.  Complete  de- 
tails in  bulletin  SD-389.  Thordar- 
son  Elec.  Mfg.  Co.,  500  W.  Huron 
St.,  Chicago,  111. — Radio  Today. 


Radio  code  course 

*  Practical,  inexpensive  method 
of  learning  the  radio  code.  Course 
consists  of  3  doubled-sided  10-inch 
records  together  with  instruction 
book.  Records  have  a  playing  time 
more  than  double  that  of  usual  rec- 
ord. Records  divided  into  parts  with 
automatic  feed  lines  and  individual 
stop  lines.  Can  be  used  on  any  78 
r.p.m.  phonograph.  Ralston  Record 
Co.,  Philadelphia,  Pa. — Radio  Today. 


Stubby  tele  tube 

*  Cathode-ray  television  tube 
that  is  considerably  shorter  than 
previous  types.  Permits  use  of  more 
compact  cabinets.  Nine-inch  tube 
only  16  inches  long  compared  with 
old  23-inch  tube.  Image  in  black 
and  white.  Videotron  manufactured 
by  National  Union  Radio  Corp., 
Newark,  N.  J. — Radio  Today. 


Relay  covers 

*  Bakelite  covers  for  midget  re- 
lays. Modernistically  designed  in 
molded  bakelite.  Held  in  place  by 
"snap  on"  fit  to  base.  Provide  pro- 
tection against  dirt  and  possible 
damage  to  relay.  Ward  Leonard 
Electric  Co.,  Mt.  Vernon,  N.  Y.— 
Radio  Today. 


5-watt  sound  system 

*  Portable  type  sound  system 
having  5-watt  output.  Crystal-type 
mike,  8-inch  P.M.  speaker,  mike 
stand,  cable.  Sturdy  carrying  case. 
Net  $19.95.  Radolek  Co.,  601  W. 
Randolph  St.,  Chicago,  111. — Radio 
Today. 


ma 


Raytheon  triode 

*  High-mu  triode  transmitter 
tube  for  amateur  transmitters.  Max- 
imum plate  dissipation  of  200  watts. 
A  pair  of  these  tubes  will  handle  1 
kilowatt  of  power.  For  R.F.  ampli- 
fiers and  oscillators.  Voltages  up  to 
3,000  may  be  employed.  Type  RK-63. 
Raytheon  Production  Corp.,  420 
Lexington  Ave.,  New  York,  N.  Y. — 
Radio  Today. 


December,  1938 


21 


Filterette  selector 

*  Interference  analyzer  to  show 
the  serviceman  what  filter  unit  to 
use.  Unit  has  circuit  components  of 
5  most  popular  noise  filters  which 
are  selected  by  a  rotary  switch.  Ser- 
viceman uses  filter  that  is  most  ef- 
fective in  reducing  noise.  Quickly 
inserted  in  power  line.  Model  P-8 — 
net  $7.50.  Tobe  Deutschmann  Corp., 
Canton,  Mass. — Radio  Today. 


Carbon  resistors 

*  Line  of  carbon  composition  re- 
sistors in  yA,  i/2,  1  and  2-watt  rat- 
ings. Low  voltage  coefficient,  mois- 
ture-proof, negligible  noise  level. 
Resistance  within  10  per  cent.  For 
R.F.  and  A.F.  circuits.  Attractively 
packaged.  Consolidated  Wire  and 
Assoc.  Corps.,  512  S.  Peoria  St.,  Chi- 
cago, 111. — Radio  Today. 


Tubular  condensers 

*  Low-cost  electrolytic  capaci- 
tors for  filtering  and  by-pass  cir- 
cuits. Fabricated  plate  anode  with 
surge-proof  separator.  Explosion- 
proof  construction.  Supplied  with 
cathode  insulating  tube.  Available 
in  capacities  from  4  to  40  mfd.  and 
voltages  from  25  to  450.  Molanode 
type  TM.  Magnavox  Co.,  Fort 
Wayne,  Ind. — Radio  Today. 


Precision  resistors 

+  Wire-wound  resistors  with  both 
terminals  at  one  end.  Units  wound 
on  ceramic  form — wire  brought  back 
internally  through  form,  yet  insu- 
lated and  protected  from  winding 
and  mounting  bolts.  Fully  impreg- 
nated. Standard  tolerance  of  1  per 
cent.    Available  up  to  1/10  of  1  per 


NEW  THINGS  IN  U.  S.  RADIO 


cent  on  order.  International  Resist- 
ance Corp.,  401  N.  Broad  St.,  Phila- 
delphia, Pa. — Radio  Today. 


Velocity  microphone 

*  Compact  mike  having  a  fre- 
quency range  of  40  to  10,000  cycles 
and  an  output  level  of  — 66  DB. 
Built-in  on-off  switch.  25-feet  of 
cable  with  removable  bayonet-lock- 
ing plug.  Mike  can  be  tilted  at  any 
angle.  Model  5MM.  Universal  Mi- 
crophone Co.,  Inglewood,  Calif. — 
Radio  Today. 


Signal  generator 

*  6-band  signal  generator  tuning 
100-15,000  KC.  Stable  oscillator  cir- 
cuit with  modulated  buffer  ampli- 
fier. Variable  modulation  from  0  to 
100  per  cent.  400  cycles  audio  out- 
put voltage  variable  up  to  25  volts. 
Built-in  dummy  antenna.  Thorough 
shielding.  Model  E-100— net  $47.50. 
Precision  Apparatus  Corp.,  821  E. 
New  York  Ave.,  Brooklyn,  N.  Y. — 
Radio  Today. 


Synchronous  vibrators 

*  Push-pull  type  of  synchronous 
vibrator.  Push-pull  coils  improve 
operation  of  unit  and  increase  life. 
Replacement  chart  listing  all  types 
available  upon  request.  Pauley- 
James  Corp.,  4619  Ravenswood  Ave., 
Chicago,  111. — Radio  Today. 


Power  resistance  decade 

*  Decade  resistance  with  range 
from  10  to  100,000  ohms  in  10-ohm 
steps.  1  per  cent  accuracy.  Mini- 
mum of  10  watts  capacity  at  any 
resistance  setting.  For  use  in  re- 
sistance   measurements    by    substi- 


tution method,  as  a  dummy  field 
coil,  bridge  circuits,  etc.  Model  55 
— net  $14.50.  Electronic  Apparatus 
Co.,  814  N.  Damen  Ave.,  Chicago, 
111. — Radio  Today. 


Hum-bucking  transformer 

*  Input  transformer  from  mul- 
tiple line  to  grid  having  hum-buck- 
ing construction.  Shielded  with  4 
high-permeability  alloy  steel  cases. 
Frequency  response  of  60  to  10,000 
cycles  within  2  db.  Type  P-202— list 
$12.  Kenyon  Transformer  Co.,  Inc., 
840  Barry  St.,  New  York,  N.  Y. — 
Radio  Today. 


Tap  switch 

*  8-position,  single-pole  switch 
for  all  purposes.  Molded  bakelite 
base,  brass  contacts,  phosphor-bronze 
switch  arm.  Shielded  by  metal  snap- 
on  cover.  Contact  indicator  visible 
through  window  in  bevel  of  cover. 
List — 75  cents.  American  Phenolic 
Corp.,  1250  Van  Buren  St.,  Chicago, 
111. — Radio  Today. 


Supreme  oscillator 

*  All-wave  signal  generator  tun- 
ing 65  to  20,500  KC  in  five  bands. 
All  bands  on  2  basic  scales.  Allow- 
able error  of  y2%-  Hairline  shadow 
indicator  reduces  parallex.  Variable 
iron-core  coils  with  air  trimmers. 
Modulation  levels  of  30  and  75% 
show  up  detector  distortion  in  set 
at  high  modulation  percentages.  De- 
signed to  fit  Lab-rack.  Housed  in 
wooden  case.  Model  571.  Supreme 
Instruments  Corp.,  Greenwood,  Miss. 
— Radio  Today. 


22 


Radio  Today 


IND  SOUND  EQUIPMENT 


Bantam  tubes 

*  Line  of  miniature  glass  tubes. 
with  octal  bases.  Types  available 
are:  6A8GT,  6K7GT,  6J7GT,  6R7GT, 
25L6GT,  25Z6GT.  These  tubes  cor- 
respond to  the  regular  octal  glass 
tubes,  but  are  smaller  in  size.  Triad 
Mfg.  Co.,  Inc.,  Pawtucket,  R.  I. — 
Radio  Today. 


Gain  indicator 

+  Constant-impedance  attenua- 
tor network  with  steps  of  attenua- 
tion directly  in  decibels  for  meas- 
urement of  amplifier  gains.  Meter 
used  to  indicate  equal  readings  so 
that  its  frequency  errors  are  can- 
celled out.  Unit  is  accurate  to 
within  1  db.  over  the  entire  audio 
spectrum.  Model  44 — net  $70.  Mon- 
arch Mfg.  Co.,  3341  Belmont  Ave., 
Chicago,  111. — Radio  Today. 

Television  capacitors 

*  Pyranol  high-voltage  condens- 
ers for  television  and  radio  trans- 
mitters. One  type  for  use  in  kineo- 
scope  deflecting  circuits  is  of  com- 
pact cylindrical  design.  Unit  is  9 
inches  long  and  2  inches  in  di- 
ameter. Heavy-duty  ceramic  insu- 
lator. Radio  types,  also  in  cylindri- 
cal cases,  have  ratings  up  to  2000 
volts  DC.  General  Electric  Co.,  Sche- 
nectady, N.  Y. — Radio  Today. 


Concentric  cable  kit 

*  Convenient  kit  of  all  necessary 
components  for  the  construction  of 
i^-inch  diameter  coaxial  cable.  All 
parts  including  instructions  are  in- 
cluded. Available  in  standard 
lengths  of  10,  25,  50  feet.  Net— 24 
cents  per  foot.  Transducer  Corp., 
30  Rockefeller  Plaza,  New  York, 
N.  Y. — Radio  Today. 


Shure  Rocket  mike 

*  Semi-directional  crystal  mic- 
rophone. Pressure-actuated  dia- 
phragm. Ultra-wide-range  response. 
Triple-moisture-sealed  crystal  unit. 
Output  level  of  minus  55  DB  with 
25-foot  cable.  Directional  baffle 
available.  Model  705A— list  $25. 
Shure  Bros.,  225  W.  Huron  St., 
Chicago,  111. — Radio  Today. 


Battery  eliminator 

*  AC-operated  battery  eliminator 
for  farm  type  receivers  using  ly2  or 
2-volt  tubes.  Supplies  hum-free  A 
and  B  power  for  any  sized  set.  Same 
size  as  2  B  batteries.  Filament  volt- 
age adjustable.  Electro-Products 
Labs.,  549  W.  Randolph  St.,  Chicago, 
111. — Radio  Today. 


Radioscope 

*  Combination  service  instru- 
ment having  an  all-wave  signal  gen- 
erator, multi-range  meter,  and  uni- 
versal speaker.  Designed  for  ser- 
vicing all  types  of  receivers.  Ver- 
nier micrometer  dial  on  oscillator 
that  can  be  read  to  1/10  of  one  di- 
vision. Model  155.  Bendix  Radio 
Corp.,  General  Motors  Bldg.,  Detroit, 
Mich. — Radio  Today-. 


Perfex  camera 

*  Candid  camera  with  focal- 
plane  shutter,  range-finder,  optical 
view  finder,  built-in  extinction-type 
exposure  meter  and  F3.5  lens.  Shut- 
ters speeds  from  1/25  to  1/500  sec- 
ond. Uses  35  mm.  film.  List  $25. 
Eveready  case  $4.50.  Telephoto  and 
faster  lenses  available.  Candid 
Camera  Corp.  of  America,  844  W. 
Adams  St.,  Chicago,  111. — Radio  To- 
day. 


Rotary  power  switch 

*  Inexpensive  power  switch  in 
single  and  double  circuits  and  single 
and  double  throws.  Rated  at  1  amp. 
250  v.,  3  amp.  125  v.,  10  amp.  12  v. 
Operates  on  arc  of  30°.  Fully  en- 
closed— 1  3/32-inch  diameter.  Claro- 
stat  Mfg.  Co.,  Inc.,  285  N.  6th  St., 
Brooklyn,  N.  Y. — Radio  Today. 


Multi-tester 

*  Universal  multi-range  meter. 
2  per  cent  meter  with  2,000  ohms 
per  volt  sensitivity.  Voltages  up 
to  1,000,  current  to  10  amps.  Ohm- 
meter  ranges  0/100/7,500/75M/7^ 
meg./lO  meg.  Decibel  calibrations 
—12  to  plus  54.  Model  409A— list 
$17.95.  Radio  City  Products  Co., 
88  Park  Place,  New  York,  N.  Y. — 
Radio  Today. 


Binaural  amplifier 

•  70-watt  binaural  amplifier  hav- 
ing twin  35-watt  output  channels. 
4  mike  and  2  phono  inputs.  Har- 
monic content  of  less  than  4  per 
cent.  Provision  is  made  for  use 
of  remote  control  mixers.  Dual  cir- 
cuit creates  auditory  perspective. 
Model  DX70.  DavH  Bogen  Co.,  663 
Broadway,  New  York,  N.  Y. — Radio 
Today. 

Radio  beacon  compass 

*  Radio  compass  for  use  in  air- 
craft. Gives  pilot  radio  compass 
navigation  in  addition  to  radio  bea- 
con flying.  Operates  only  on  Dept. 
of  Commerce  and  Marine  beacon 
stations.  Weighs  only  13  pounds. 
Radio  Frequency  Labs.,  Boonton, 
N.  J. — Radio  Today-. 


December,  1938 


23 


MONEY  IN 


PROFITS  IN  CHURCH  BELFRIES 

Further  development  of  the  "church 
market"  for  sound  dealers  is  the  re- 
sult of  a  recent  installation  of  am- 
plified chimes  in  an  eastern  church. 
The  finished  job  sounds  like  massive 
bells,  throughout  an  area  of  ten  square 
miles,  but  was  not  expensive  to  the 
clergy. 

This  system  utilizes  as  its  source 
a  set  of  21  standard  tubular  chimes 
such  as  those  used  by  musicians. 
These  are  played  from  a  small  key- 
board attached  to  the  organ  console 
and  their  sound  is  picked  up  by  two 
microphones,  placed  for  properly  pro- 
portioned pick-up.  These  are  stand- 
ard crystal  microphones  and  are  fed 
into  the  mixing  panel  of  a  250-watt 
amplifier  specially  developed  for  this 
service  by  Transformer  Corporation 
of  America.  The  heavy-duty,  horn- 
type  loudspeakers,  four  of  which  are 
mounted  in  the  bell  tower,  are  fed 
through  a  low-impedance  line  and 
are  capable  of  handling  up  to  160 
watts  output. 

Centrally  located  in  a  city  which 
has  an  area  of  average  size,  it  has 
never  been  found  necessary  to  oper- 
ate the  system  at  full  capacity.  In 
fact  both  the  amplifier  and  the  loud- 
speakers provide  more  than  ample  re- 
serve to  take  care  of  the  surges  which 
are  characteristic  of  the  initial  "ham- 
mer thump"  of  the  chimes,  a  feature 
which  received  the  special  attention 
of  the  T.C.A.  engineers  in  the  design 
of  the  amplifier. 


RECORDED  SOUND  TO  FIGHT 
NEXT  WAR  FOR  FRANCE 

Another  Biblical  story  has  come  to 
ultra-modernistic  life  in  the  newest 
French  application  of  sound  equip- 
ment, taken  very  seriously  in  Paris 
and  said  to  have  been  adopted  by  the 
French  Government,  according  to  Dr. 
E.  E.  Free,  consulting  acoustical  en- 
gineer, New  York.  This  is  a  method 
of  fighting  battles  by  loudspeakers 
and  phonographs. 

The  seventh  chapter  of  the  Second 
Book  of  Kings  tells  how  the  siege  of 
Samaria  was  lifted  when  the  besiegers 
thought  they  heard  a  great  noise  of 
horses  and  chariots,  imagined  a  vast 
host  surrounding  them  and  promptly 
ran  away — an  episode  from  which 
the  Prophet  Elisha  acquired  consid- 
erable credit.  Just  what  the  besiegers 
really  heard  is  not  disclosed.  Per- 
haps Elisha  or  his  friends  sent  out 
some  secret  noise-making  expedition. 

This  is  just  what  is  proposed  by 
the  French  inventor,  M.  IVIaxime 
Baze.  He  suggests  that  armies  be 
equipped  with  powerful  loudspeakers 
and  phonograph  records.  Some  dark 
night  the  sounds  of  an  attack  will  be 
turned  toward  the  enemy's  trenches. 
Phantom  tanks  will  clank  and  rum- 
ble. Imaginary  shells  will  whiz  over- 
head and  explode.  Sounds  of  march- 
ing infantry,  even  the  half-muffled 
curses  of  the  marchers,  will  be  shot 
against  the  enemy.  Holders  of  the 
trenches    are   expected    either   to   run 


Light-weight,  efficient  speakers  replace  bells  in  church  towers,  eliminating  costly 
reinforced  structures.    Sound  systems  provide  results  at  a  fraction  of  usual  cost. 


away  or  to  be  kept  exhaustingly  alert. 
For  defense  purposes,  a  sound  bar- 
rage of  stuttering  machine  guns  and 
singing  bullets  might  re-inforce  a  few 
real  guns  to  deter  attacks.  For  night 
air  raids  a  drifting  balloon  with  loud- 
speakers fed  by  radio  from  phono- 
graphs miles  away,  would  keep  every- 
body awake  and  terrified. 


PA  IN  FACTORIES  IS  OK 

Further  evidence  that  sound  sys- 
tems in  factories  are  beneficial  has 
been  revealed  by  psychologist  John  F. 
Hume  of  Ohio  State  University.  His 
investigation  indicates  that  when  mu- 
sic is  played  among  factory  workmen, 
there  are  less  errors  and  "from  the 
point  of  view  of  factory  morale,  mu- 
sic is  highly  beneficial  and  desirable." 
All  this  adds  weight  to  the  sales  ar- 
guments of  PA  salesmen  who  have 
factory  managers  on  their  prospect 
lists. 

Professor  Hume  made  his  tests  at 
the  Hygrade  Sylvania  tube  plant  at 
Emporium,  Pa.,  where  the  hands  and 
fingers  of  the  employes  have  to  he 
nimble.  This  plant  has  a  48-speaker 
system  which  carries  recorded  music 
to  all  production  departments. 

The  conclusions  were  that  music 
has  a  pleasant  effect  on  workers,  and 
that  to  satisfy  the  average  musical 
preferences,  the  playing  of  two  rec- 
ords every  half  hour  is  a  satisfactory 
plan.  Slow  swing  and  sweet  music 
are  favored. 


DOORLESS  PHONE  BOOTH  IS  QUIET 

*  Doorless  telephone  booths  have 
recently  been  rendered  quiet.  The 
new  booth,  resembling  the  conven- 
tional booth  in  shape,  but  lacking  the 
usual  door,  is  lined  with  special 
acoustical  tiles  that  are  pierced  with 
hundreds  of  small  holes,  %a  in.  in 
diameter. 

These  holes  are  the  secret  of  the 
treatment's  effectiveness,  for  they 
"soak  up"  the  sound  waves  striking 
them  and  successfully  establish  a 
quiet  environment  that  permits  con- 
versation undisturbed  by  outside 
noise.  In  addition,  they  also  absorb 
the  sound  waves  of  the  speaker's  own 
voice,  thereby  providing  more  pri- 
vacy and  reducing  the  possibility  of 
his  being  overheard  by  others. 

The  tiles  can  be  applied  to  any 
booth.  Twelve  inches  square,  1%  in. 
thick,  they  are  cemented  directly  over 
any  new  or  old  wall.  Once  installed, 
they  are  effective  for  the  life  of  the 
booth,  stated  Wallace  Waterfall,  tech- 
nical engineer  with  the  Celotex  Corp. 


24 


Radio  Today 


Radio  Brings  ALL  Music 

Sv ,•-*■  TqALL  People  % 


^O^E^jNi 


Radio  Lets  the  Nation  Enjoy 

U.  S.  Army,  Navy,  and 

Marine  Bands 


CAPT.  THOMAS  F.  DARCY,  Jr. 
Leader  U.  S.  Army  Band 


LIEUT.  CHARLES  BENTER 
Leader  U.  S.  Navy  Band 


Wi 


CAPT  TAYLOR  BRANSON 
Leader  U.  S.  Marine  Band 

Every  village  has  its  band,  but  Uncle 
Sam's  Army,  Navy,  and  Marine  Bands 
rank  with  those  great  concert  bands 
which  have  glorified  brass  music. 


\BC  Symphony  Orchestra,  tinder  di- 
rection oj  Arluro  Toscanini  rehearses 
long  hours  to  achieve  perfection  on  the 
air.  (Above,  the  woodwinds  rehearse) 


/^~7  3  ~)HILE  RADIO  has  made  outstanding  contributions 
*-^-s  to  American  culture  through  scores  of  instructive 
programs.  .  .  radio's  supreme  contribution  is  music. 

Consider  the  musical  contributions  of  NBC,  one  mem- 
ber of  the  family  of  RCA!  It  is  generally  conceded  that 
the  most  brilliant  musical  accomplishment  of  radio  is  the 
NBC  Symphony  Orchestra,  under  the  leadership  of  the 
great  Maestro  Arturo  Toscanini. 

Another  member  of  the  family  of  RCA,  RCA  Victor, 
manufactures  outstanding  radios.  And,  through  Victor  and 
Bluebird  Records,  RCA  Victrolas,  and  inexpensive  RCA 
Victrola  Attachments,  RCA  Victor  offers  to  all  the  oppor- 
tunity to  repeat  the  music  they  want  when  they  want  it. 

By  helping  make  all  America  music  conscious,  the 
Radio  Corporation  of  America  has  created  a  market  of 
unlimited  possibilities  for  the  retailers  and  wholesalers 
who  go  "RCA  All  the  Way"  and  reap  the  benefits  of  the 
public  acceptance  of  all  things  made  bv  the  only  organiza- 
tion that  makes  and  does  everything  in  radio  and  sound. 

Listen  to  the  '  'Magic  Kev  of  RCA ' '  every  Sunday,  2 
to  3  P.M.,  E.  S.  T.,  on  the  NBC  Blue  Network. 

Radio  Corporation  of  America 

RADIO  CITY,  NEW  YORK,  U.  S.  A. 

National  Broadcasting  Company  •  RCA  Institutes,  Inc. 

RCA  Manufacturing  Co.,  Inc.    •    R.C.A.  Communications,  Inc. 

Radiomarine  Corporation  of  America 


December,  1938 


25 


DYNAMIC  ALIGNMENT  OF  RADIO  SETS 

Adjustment  of  trimmers  in  receivers  should  be  done  with  sain 
or  AVC  at   level    ordinarily    used   when    listening   to   stations 


By  Vinton  K.  Ulrich,  Service  Editor 

The  alignment  procedure  for  receiv- 
ers as  generally  advocated  is  not  dy- 
namic in  every  sense  of  the  word.  To- 
day's alignment  usually  takes  place 
at  maximum  sensitivity  of  the  re- 
ceiver (before  the  AVC  takes  hold),  a 
condition  under  which  few,  if  any  of 
the  sets  are  ever  operated  hy  the  cus- 
tomer. As  defined  by  Radio  Today 
many  months  ago,  for  true  dynamic 
testing,  all  tests  or  adjustments  should 
be  made  under  conditions  similar  to 
those  under  which  the  receiver  oper- 
ates. 

Tests  have  shown  that  a  receiver 
aligned  properly  at  maximum  sensi- 
tivity is  not  always  properly  aligned 
when  tuned  to  a  radio  signal  which 
develops  an  AVC  bias  (reduced  re- 
ceiver sensitivity). 

The  reason  for  this  change  in  the 
alignment  conditions,  is  that  chang- 
ing the  bias  on  an  amplifier  tube,  such 
as  is  used  in  an  I.F.  stage,  changes 
the  interelectrode  capacitances.  The 
capacity  undergoing  the  greatest 
change  is  the  control  grid  to  cathode 
or  input  capacitance  of  the  tube.  Since 
this  input  capacitance  is  in  parallel 
with  the  tuned  grid  circuit  of  the 
stage,  it  is  only  natural  that  its  reso- 
nant frequency  will  change  with  varia- 
tions in  the  tube  capacity. 

Circuit  detuning 

R.  E.  Freeman  of  Hazeltine  has 
shown*  that  the  change  in  capacity  is 
about  2Vz  micromicrofarads.  Curves 
taken  from  an  experimental  set-up 
using  typical  circuit  components  show 
changes  of  six  or  more  kilocycles  in 
the  resonant  frequency  of  the  grid  cir- 
cuit  when   the   bias   is   changed.    Fig. 


*Proceedings  of  the  Institute  of  Radio  Engi- 
neers, Nov.  1938,  pages  1360  to  1366.  Figs. 
1,  5,  6  courtesy  of  the  I.R.E. 


Fig.    1A — Top    curves    show    detuning 

caused  by  varying  grid   bias. 
Fig.  IB — Detuning  is  practically  elim- 
inated when  inverse  feedback  is  used. 


1-A  shows  the  amount  of  detuning  in 
the  grid  circuit  caused  hy  changes  in 
the  bias  of  the  amplifier  tube.  Fig.  1-B, 
which  will  be  discussed  later,  shows 
how  inverse  feed-hack  reduces  the  de- 
tuning to  a  negligible  amount. 

In  order  to  determine  what  effect 
the  grid  bias  had  on  a  properly  aligned 
receiver  of  commercial  manufacture, 
the  I.F.  channel  of  a  typical  all-wave 
receiver  was  aligned  according  to  the 
accepted  procedure  —  namely,  AVC 
shorted  out  and  the  signal  fed  into  the 
converter  tube.  In  order  to  provide 
visual  proof,  a  frequency-modulated 
oscillator  and  oscilloscope  were  em- 
ployed as  recommended  by  the  manu- 
facturer. 


Fig.  5 — Overall  I.F.  response  as  measured 
by    Freeman    for    various    values    of    grid 
bias.    Note  that  the  selectivity  is  less  when 
the    stage    becomes    detuned. 


Fig.  6 — At  the  top  the  effect  of  de- 
generation in  reducing  the  detuning 
is  shown  by  the  solid  lines.  Bottom 
shows  circuit  used  for  making  tests. 


The  I.F.  response  is  shown  in  Fig. 
2-A,  and  it  is  the  best  obtainable  for 
that  receiver.  Next  the  grid  (AVC) 
bias  was  manually  adjusted  to  a  value 
equal  to  that  developed  by  the  AVC 
for  a  popular  New  York  station.  In 
Fig.  2-B  is  shown  the  new  pattern  on 
the  screen  of  the  oscilloscope.  Only 
changes  in  the  set-up  were  the  bias 
on  the  receiver's  I.F.  and  the  gain  on 
the  vertical  amplifier  of  the  oscillo- 
scope. The  change  in  the  pattern  was 
due  merely  to  the  change  in  the  bias 
as  predicted  by  Freeman. 

Since  it  appears  that  the  I.F.  of  the 
set  is  at  the  wrong  frequency,  the  os- 
cillator frequency  was  varied  slightly 
in  an  effort  to  bring  the  two  traces 
back  together.  It  was  impossible  to 
bring  the  traces  back  together  so  that 
they  would  coincide.  Inspection  of 
Fig.  2-B  shows  definitely  that  the  two 
traces  are  not  identical,  which  means 
that  the  I.F.  response  characteristic 
is  no  longer  symmetrical.  To  obtain  a 
coincidence  of  the  curves,  it  was  neces- 
sary to  readjust  the  I.F.  trimmers  in 
the  receiver. 

Asymmetrical  I.F.  curves 

Mr.  Freeman  in  reference  to  his 
curves  states,  "Inasmuch  as  higher  im- 
pedance transformers,  and  tubes  hav- 
ing greater  values  of  Cgp  are  often 
used,  the  case  is  not  an  exaggerated 
one.  When  automatic  volume  control 
bias  is  used  on  such  an  amplifier,  the 
detuning  causes  considerable  asym- 
metry as  well  as  loss  of  adjacent- 
channel  selectance  (selectivity).  With 
very  strong  signals,  the  selectance  ra- 
tio is  relatively  unimportant  but  audio- 
frequency distortion  may  then  occur 
due  to  unequal  transmission  of  the 
side  bands  and  the  carrier.  In  the 
case  of  overcoupled  (high  fidelity) 
transformers,  an  asymmetrical  response 
curve  results  with  large  automatic 
volume  control  bias,  and  the  over-all 
fidelity   suffers." 

Fig.  3  shows  pictorially  the  relation- 
ship between  the  signal  (carrier  and 
side  bands)  and  the  response  charac- 
teristic of  the  I.F.  channel.  When  the 
set  is  aligned  at  maximum  sensitivity, 
the  carrier  coincides  with  the  I.F.  peak 
of  the  set.  But  when  the  sensitivity 
is  reduced  by  increasing  the  bias,  the 
carrier  and  the  I.F.  peak  no  longer 
coincide — the  signal  is  detuned. 

If  the  resonant  circuits  in  the  set 
are  to  change  so  much,  from  no  bias 
to  a  bias  equal  to  that  ordinarily  en- 
countered in  normal  set  operation,  it 
is  apparent  that  our  present  advo- 
cated" methods  of  alignment  need  re- 
vision. Fig.  5  shows  how  the  over-all 
I.F.  response  characteristic  varies  with 
bias  changes. 

While  so  far  the  discussion  has  been 
in  reference  to  the  I.F.,  the  same  con- 
ditions are  true  for  the  high-frequency 
circuits  in  the  receiver.  Naturally  the 
effects  will  be  most  noticeable  at  the 


26 


Radio  Today 


Fig.  2A — Resonance  curve  for  a  prop- 
erly aligned  superhet  shown  at  top. 
Fig.  2B — When  the  sensitivity  is 
changed,    the    I.F.    becomes    detuned. 

high-frequency  end  of  the  band,  since 
a  2y2  micromicrofarad  change  is  a 
greater  percentage  of  the  circuit  ca- 
pacity when  the  condensers  are  nearly 
unmeshed.  In  television  receivers  it 
is  extremely  important  to  nullify  the 
capacity  change — a  method  of  doing 
so  will  be  discussed.  However,  in 
most  broadcast  receivers,  the  R.F.  cir- 
cuits are  quite  broad  and  a  slight  de- 
tuning is  not  serious;  but  since  a 
dynamic  alignment  procedure  should 
be  used  in  the  I.F.  it  is  no  additional 
trouble  to  use  it  in  the  R.F.  as  well. 

Before  getting  into  the  dynamic 
alignment  procedure,  it  is  desirable  to 
consider  Mr.  Freeman's  method  of 
overcoming  the  detuning  effects  of  the 
tube,  particularly  since  it  will  be  used 
in  many  of  the  future  receivers. 

Although  inverse  feedback  has  been 
synonymous  with  audio  circuits,  now 
it  is  being  advocated  for  use  in  the 
high-frequency    circuits.      One   method 


of  introducing  feedback  into  the  cir- 
cuit is  by  changing  the  low  side  of  the 
trimmer  condenser  from  the  coil  to 
the  cathode  of  the  tube  which  is  con- 
nected to  an  unby-passed  15  ohm  re- 
sistor. Fig.  2-B  shows  the  reduction 
in  the  detuning  when  such  a  change 
is  made.  However,  because  of  mechani- 
cal difficulties,  the  serviceman  is  cau- 
tioned not  to  attempt  this  change. 

A  second  method  of  introducing  in- 
verse feedback  is  accomplished  by  re- 
moving the  cathode  by-pass  condenser 
in  those  sets  having  a  cathode  resistor 
of  about  300  ohms.  It  happens  that 
the  300-ohm  resistor  commonly  used 
in  sets  provides  about  the  right  amount 
of  feedback.  The  reduction  of  the  de- 
tuning when  the  cathode  condenser  is 
removed  is  shown  in  Fig.  6,  as  well 
as  the  circuit  employed  for  the  tests. 

The  gain  of  the  receiver  will  be  de- 
creased when  degeneration  is  intro- 
duced. But  since  most  sets  have  more 
than  ample  gain,  nothing  is  lost.  It 
is  a  good  idea  for  the  serviceman  to 
be  extremely  careful  about  making 
any  circuit  changes  in  the  receiver — 
for  instance  if  the  customer  is  one  of 
those  few  DX  or  short-wave  enthusi- 
asts, nothing  should  be  done  that  will 
reduce  the  gain  of  the  set. 


Dynamic  alignment 

While  changes  are  sometimes  pos- 
sible in  the  customer's  set,  many  times 
it  is  inadvisable  to  attempt  circuit  re- 
arrangements. When  it  is  not  prac- 
tical to  overcome  the  detuning  effects, 
the  true  dynamic  procedure  must  be 
used — either  with  resonance  indicators 
or  the   cathode-ray  oscilloscope. 

Generally  speaking,  nearby  powerful 
stations  generate  AVC  biases  of  about 
15  volts.  Actually  it  varies  with  the 
signal  strength,  receiver  model,  and 
number  of  AVC  controlled  stages.  A 
simple  way  of  determining  the  amount 
of  AVC  voltage  developed  is  through 
the  use  of  a  milliammeter  in  the  ca- 
thode circuit  of  an  AVC  controlled 
tube.  By  tuning  in  the  stations  that 
the  customer  normally  listens  to,  the 
serviceman  can  figure  the  average  bias 
in  terms  of  the  cathode  current.  Or  if 
a  tuning  meter  is  employed,  its  aver- 


age deflection  or  shadow  variation  can 
be   noted. 

Because  the  cathode  current  is  de- 
pendent upon  the  bias,  it  is  possible 
to  apply  a  bias  to  the  tube  equal  to 
that  developed  by  the  AVC  and  use 
the  cathode  current  as  an  indicator  of 
the  proper  amount  of  bias.  Fig.  4 
shows  how  the  fixed  bias  should  be  in- 
troduced to  the  AVC  circuit.  The  bat- 
tery bias  is  varied  by  the  setting  of 
the  potentiometer.  The  AVC  line  is 
broken  either  at  point  A  or  B  and  the 
battery  bias  connected  to  the  AVC  line 
and  ground.  In  many  cases  it  will  be 
possible  to  merely  connect  the  bias  be- 
tween ground  and  point  A  without 
opening  the  AVC  circuit. 

Adjusting  external  bias 

The  battery  voltage  is  then  adjusted 
until  the  cathode  current  is  equal  to 
average  current  that  flowed  when 
tuned  to  the  various  stations.  In  the 
case  of  tuning  indicators,  the  bias  is 
adjusted  until  the  indication  is  equal 
to  the  average  produced  by  the  sta- 
tions. 

(Since  all  these  adjustments  are 
based  on  signal  strengths,  the  service- 
man should  take  into  account,  if  pres- 
ent, any  great  differences  in  signal 
strengths  between  the  shop  and  the 
customer's  home.) 

After  the  AVC  voltage  has  been  prop- 
erly adjusted,  the  set  is  aligned  in  the 
usual  manner. 

Should  the  customer  want  extreme 
sensitivity,  it  is  essential  that  align- 
ment take  place  at  or  just  before  the 
AVC  takes  hold.  Only  by  alignment 
under  these  conditions  can  full  advan- 
tage be  taken  of  all  the  gain  in  the  set. 

While  these  measurements  or  ad- 
justments may  seem  rather  involved, 
they  are  quite  simple.  When  a  tuning 
indicator  is  used  in  the  set,  and  if  the 
serviceman  desires  to  use  it  as  an  in- 
dicator for  alignment,  it  is  not  at  all 
necessary  to  disturb  the  AVC  line  of 
the  set.  The  action  of  the  tuning 
meter  is  observed  for  the  various  sta- 
tions and  the  average  noted.  Then 
the  output  level  of  the  signal  gen- 
erator is  adjusted  so  that  it  causes  a 
(Continued  on  page  30) 


Fig.  3 — When  a  receiver  is  aligned  at  maximum  sensitivity,  the  I.F. 

peak  and  signal  coincide.     Reducing  set  sensitivity  causes  a  shift  in 

the   I.F.   peak   and   as   a   result   the   side   bands   of   the   signal   are 

discriminated  against,  causing  distortion. 


Fig.  A — Circuit  employed  for  biasing  the  AVC  sys- 
tem to  such  a  value  as  exists  for  normal  operation  of 
the   receiver.     A   variable   battery  voltage  is   substi- 
tuted for  the  AVC  bias. 


December,  1938 


27 


ELECTRICAL  FLASHES 

Crosley  unveils  1939  Shelvador;  Philco  enters  field 


REFRIGERATOR  FOR  FARM  KITCHENS 

=  r3 


*  The  current  period,  from  mid- 
December  to  mid-January,  will  reveal 
most  of  the  year's  new  refrigerators. 
Crosley,  Gibson,  Kelvinator,  Westing- 
house  and  others  introduced  new 
merchandise  early  this  month.  Stew- 
art-Warner plans  a  big  national  con- 
vention at  the  Edgewater  Beach  Ho- 
tel, Chicago,  Jan.  5-7.  Norge  will 
hold  its  convention  Jan.  9-11  in  De- 
troit. 

New  numbers  in  major  appliances 
will  also  be  seen  at  three  shows  in 
Chicago  during  the  week  of  Jan.  8. 
Two  of  them  are  home  furnishings 
events,  to  be  held  at  the  Stevens  Ho- 
tel and  at  the  Palmer  House.  The 
third  will  be  staged  by  permanent 
exhibitors  at  the  Merchandise  Mart. 

General  Electric  plans  a  feature 
series  of  traveling  shows.  It  is  said 
that  Leonard  will  invite  jobbers  to 
special  meetings  Jan.  6-14,  at  Detroit. 

CROSLEY  ANNOUNCES  1939 
STREAMLINED  SHELVADOR 

*  Three  new  electric  refrigerator 
models  are  now  being  shown  to  deal- 
ers over  the  country  by  Crosley  dis- 
tributors and  district  managers.  Ac- 
tive in  the  field  also  are  Crosley 
Corp.'s  Thomas  W.  Berger,  general 
sales  manager,  and  Neil  Bauer,  as- 
sistant sales  manager. 

Cabinets  have  been  redesigned  in 
new  streamlines,  with  one-piece  con- 
struction, electrically  welded  into  one 
complete  unit.  Rock  wool  insulation 
is  sealed  in,  and  the  cabinet  finished 
in  durable  white  dulux.  Hardware 
is    chrome    finished    and    of    massive 


Streamlined  to  please  the  eye,  the  new, 

improved  Crosley  Shelvador  makes  its 

bow. 


streamline  design.  The  porcelain  food 
compartment  has  an  acid-resisting 
stainless  bottom,  and  each  model  is 
provided  with  an  automatic  interior 
light. 

All  include  new  and  improved  de- 
sign in  the  built-in  shelves-in-the- 
door,  and  the  electro-saver  hermeti- 
cally sealed  mechanism.  A  new  evap- 
orator is  set  off  by  an  attractive 
radio-type  temperature  control  of 
blue  tennite  and  provides  18  different 
temperature  adjustments. 

Other  new  features  include  two- 
position  sliding  shelf,  ovenproof  pot- 
tery set,  consisting  of  three  colored 
bowls  and  lids,  with  a  modernistic 
pitcher  completing  the  set.  Clear 
glass  jars  with  close-fitting  lids  are 
also  included  for  storing  leftovers  in 
the  shelves-in-the-door.  The  quick 
release  cube  tray  has  been  newly  de- 
signed and  improved.  A  fast-freeze 
compartment  is  conveniently  placed 
in  the  evaporator  and  the  smooth  sur- 
faces inside  and  out  make  cleaning 
easy.  Aluminum  trays  and  grids 
speed  the  freezing  of  ice  cubes  and 
desserts.  The  two  larger-sized  mod- 
els have  self-sealing  double  vegetable 
crispers.  A  non-refrigerated  storage 
bin  is  provided  in  the  lower  part  of 
the  cabinets  of  all  models  for  extra 
supplies  of  bottled  and  canned  goods. 
If  desired,  a  radio  may  be  installed 
in  lieu  of  the  storage  bin. 

There  are  three  models  in  the  de- 
luxe line,  with  capacities  of  4J4,  5*4 
and    6J4    cubic    feet. 


PHILCO  ADDS 

ELECTRIC  REFRIGERATORS 

"Starting  with  1939  a  subsidiary 
of  the  Philadelphia  Storage  Battery 
Company  will  manufacture,  and  Phil- 
co Radio  &  Television  Corporation 
will  sell  a  new  line  of  Conservador  re- 
frigerators," announces  Larry  E. 
Gubb,   Philco's   president,   who    adds : 

"Philco's  program  for  the  refrig- 
erator business  will  be  first  to  build  a 
solid  foundation.  We  believe  there  is 
a  place  for  us  in  the  industry  with  a 
quality  product  backed  by  sound  mer- 
chandising. 

"Contracts  for  distribution  of  Con- 
servador refrigerators  will  be  separate 
and  distinct  from  contracts  for  dis- 
tribution of  Philco  radios.  In  some 
cases  the  distributors  and  their  terri- 


An  oil-burning  refrigerator,  for  deal- 
ers to  sell  "beyond  electric  lines."  It 
has  an  automatic  flame,  burns  kero- 
sene, and  is  said  to  operate  at  a  cost 
of  $10  a  year.  A  "Superfex"  by  Per- 
fection Stove  Co.,  Cleveland. 

tories  may  be  the  same.  In  most  cases 
they  will  probably  be  different.  The 
policy  will  be  to  give  equal  considera- 
tion to  applications  for  distributor- 
ships from  former  Conservador  distrib- 
utors, Philco  radio  distributors,  and  in 
some  cases,  from  distributors  who  have 
not  sold  either  in  the  past.  We  will 
be  glad  to  receive  applications  for 
1939  distributorships  immediately." 

VACUUM  CLEANER  MEN 
HAVE  SILVER  JUBILEE 

*  With  good  prospects  for  a 
1,250,000-unit  year,  the  Vacuum 
Cleaners  Mfrs.  Association  recently 
celebrated  its  Silver  Jubilee,  meeting 
at  Hot  Springs,  Va. 

Four  founding  members  were  hon- 
ored at  the  anniversary  celebration. 
They  are  Fred  Wardell,  Eureka  Vac- 
uum Cleaner  Co. ;  Fred  Bissell,  Na- 
tional Super  Service  Co.;  H.  W. 
Hoover,  the  Hoover  Co.;  and  Adam 
A.  Breuer,  Breuer  Electrical  Mfg.  Co. 

Officers  and  executive  board  were 
re-elected,  these  comprising:  presi- 
dent, R.  J.  Simmons,  Birtman  Elec- 
tric Co.,  Chicago ;  vice-president,  P. 
A.  Geier,  P.  A.  Geier  Co.,  Cleveland; 
secretary-treasurer,  C.  G.  Frantz, 
Apex  Electrical  Mfg.  Co.,  Cleveland; 
executive  board,  Messrs.  Simmons, 
Geier,  Frantz,  Wardell  and  Hoover, 
Charles  G.  Groff,  Electrolux  Corp., 
New  York,  and  Julius  Tuteur,  Elec- 
tric Vacuum  Cleaner  Co.,  Inc., 
Cleveland. 


28 


Radio  Today 


DEALERS  ARE  ALREADY 
AWAY  TO  A  SUCCESSFUL 


1939 


^DELIVERED  AND  INSTALL!  0...  5  YE^RO^tionPLANJ^OOaOD^ 

€Re$t£Y  LOW  PRICES 

GIVE    DEALERS    A    RUNNING    START    IN    GETTING    PROSPECTS    •    CLOSING    SALES 


WfaV    "beaded    J9 
Cr    ,     forde»l  dy    eat'   *s- 

*a/£°jV,  4^4  Per. 
Set  v»     Sel<  all'est  rek-Ure 


THE   SMARTLY  CONCEIVED   AND   SMARTLY   PRICED  "DELUXE   LINE"  OF   NEW  1939 

€ftOSt£¥  SHELVADORS 

ATTRACT  CUSTOMERS  NOW   •    ARE   HIGHLY  SALABLE    •   AND   MOST  PROFITABLE 


December,  1938 


29 


THE    RIDER 

CHANALYST 


provides  the  most  fundamental 

METHOD    OF    TROUBLE-SHOOTING 


The  Rider  Chanalyst  is  universal  in  ap- 
plication— it  is  fool  proof — it  is  fast.  It 
provides  the  logical  method  of  trouble- 
shooting because  it  operates  on  the  most 
fundamental  thing  in  any  radio  receiver — 
THE  SIGNAL.  Regardless  of  who  made  it 
— regardless  of  where  it  was  made — re- 
gardless of  circuit  design — you  can  local- 
ize the  trouble  in  a  faulty  receiver  quicker 
with  the  Rider  Chanalyst.  You  go  through 
the  set  as  fast  as  you  can  move  the  probes 


and  thus  determine  exactly  where  the  sig- 
nal dies — fades — becomes  distorted  or 
takes  on  hum.  This  method  is  not  only 
faster — it  eliminates  guesswork.  Testi- 
monials by  competent  servicemen  attest 
to  these  facts!  But — don't  take  their  word 
for  it — don't  take  our  word  for  it — get  a 
demonstration  from  your  jobber  today — see 
for  yourself!  Plan  now  to  save  hundreds 
of  hours  in  the  coming  year  with  a  Rider 
Chanalyst! 


,rM  OPSRAT1N O  VO     ^J^ 

*    —*— ■ ^T„  iadi°  *e\  bios*    V*  ,.j,   i-t   °?    e  and  c 


ceJet  »£«?£»  f^J'i.'*  *•£&■■ 

°Peia„I  oi  *e  s        ,  block"}?  c°      io? 


not  acn      .elec»s  »oU"   \tages.   ™  a\\.etn- 
0o<  *e   °p,cW  «f tests,   X  insti"" 


vides  »eS0ter»i«05  °° 

s"ch  °  «lges.  .  „«   give   °*e,l0dio 

atnpje*    bootog  — 
"?*«'"  ietne*bet 

"ft"09'      meant"°e' 

to  tbe         „_i„  ONE  Bi 


;-e»ean^-  .der 

'«  Only  OJN*  -+u,jth 
"  'l**?    ,  TCornpare it** 


T^HIDEH 

Chanalyst 


SERVICE  INSTRUMENTS,   INC.,   404  FOURTH  AVE.,  NEW  YORK  CITY 


DYNAMIC  TESTING 

(Continued  from  page  27) 

deflection  equal  to  the  average  of  that 
caused  by  the  stations.  Then  the  re- 
ceiver is  aligned  for  maximum  indi- 
cation on  the  tuning  indicator. 

This  method  can  also  be  used  with 
a  vacuum  tube  voltmeter  connected 
across  the  AVC  line,  employing  it  in 
a  manner  similar  to  the  tuning  indi- 
cator. This  tuning  indicator  method 
of  alignment  is  particularly  advan- 
tageous, since  the  serviceman  can  get 
an  idea  of  the  average  indicator  de- 
flection while  the  set  is  in  the  cus- 
tomer's home  and  connected  to  his  an- 
tenna. Of  course,  if  the  cathode-ray 
alignment  is  desired,  the  use  of  the 
timing  indicator  is  not  possible. 

Manual  gain  control 

Though  no  mention  has  been  made 
of  sets  having  manual  gain  controls, 
the  same  procedure  and  theory  applies 
to  those  receivers  as  does  to  the  AVC 
sets.  It  is  not  necessary,  however,  to 
use  an  external  bias,  since  adjustment 
of  the  manual  gain  control  automati- 
cally accomplishes  the  desired  voltage 
changes. 

Some  may  feel  that  this  procedure 
is  unnecessary  in  view  of  the  fact  that 
there  has  been  no  apparent  difficulty 
noticeable  to  date  in  alignment  meth- 
ods. However,  if  extremely  careful 
and  accurate  alignment  is  necessary, 
then  this  true  dynamic  alignment 
method  is  essential;  for  the  changes 
caused  by  the  varying  bias  are  much 
greater  than  the  imperfections  in 
alignment  caused  by  usual  routine 
alignment  methods. 

Occasionally  one  hears  servicemen 
comment  that  the  set  sounds  no  bet- 
ter and  sometimes  worse  after  align- 
ment— it  is  conceivable  that  this  lack 
of  improvement  in  the  performance  is 
because  alignment  takes  place  at  maxi- 
mum sensitivity  instead  of  at  the  sen- 
sitivity  normally   used. 


GOLENPAUL  ANSWERS 
SERVICEMEN'S  QUESTIONS 

Rubbing  shoulders  with  radio  ser- 
vicemen from  coast  to  coast  .  .  .  fre- 
quently addressing  gatherings  here 
and  there  .  .  .  always  ready  to  lis- 
ten to  the  problems  of  servicemen 
and  to  advise  them — Charley  Golen- 
paul  of  Aerovox  Corporation  picks 
up  a  lot  of  questions  in  the  course 
of  a  month.  Realizing  that  one 
man's  problem  may  be  that  of  a 
thousand  other  servicemen  scattered 
throughout  the  country,  Charley 
Golenpaul  has  made  available  to  our 
readers  typical  questions  and  an- 
swers that  came  up  at  a  recent  meet- 
ing in  New  Jersey: 

Q.  Why  do  radio  parts  manufac- 
turers have  list  prices? 

A.  Because  list  prices  serve  to  pro- 
tect the  trade  discount  structure  for 
everyone  concerned.  In  other  words, 
some  servicemen  are  foolish  enough 
to  tell  the  set-owner  what  parts  are 
required  for  a  given  repair  job.  The 
set-owner   has   often   been   known   to 


30 


Radio  Today 


3  Great 

Engineering 

Features 


;.' 


10  o°°  / 


Make 


IOQC 


CONTROLS 

Permanently 

QUIET 

All  pioneered  and  perfected 
by  IRC  ...  All  three  avail- 
able only  in  IRC  Type  CS 
Volume  Controls  .  .  .  and  at 
ordinary  control  prices. 

NO    SLIDE  .  .  . 
NO    FRICTION 

Metal-to-metal,  sliding  contact  be- 
tween rotor  arm  and  end  terminal 
is  "out."  Noise  hasn't  a  chance. 
The  IRC  Silent  Spiral  (positive 
contact)    Connector    sees    to    that. 

THE    GLIDING 
ELEMENT   RIDER 

Instead  of  a  single  "rough-riding" 
contact  to  element,  five  separate 
spring-like  contacts  give  a  cush- 
ioned "knee-action"  effect.  Con- 
tactor acts  independently;  each 
tracks  smoothly  in  perfect  unison; 
each  is  plated,  rounded,  smoothed 
to   avoid    abrasion    and   wear. 

SMOOTH 
AS   GLASS. . . 

The  ideal  surface  for  noise-free 
contact  is  supplied  by  the  famous 
IRC  Metallized  type  resistance  ele- 
ment permanently  bonded  to  a 
moisture-proof  bakelite  base.  You 
can  actually  feel  the  difference  as 
the  5-Finger  Knee  Action  Contac- 
tor is  rotated  across  this  element. 

INTERNATIONAL 

RESISTANCE   COMPANY 

401  N.  BROAD  ST. ,  PHI  L  ADELPHI A 


go  to  the  jobber's  store  and  to  ask 
for  such  parts.  A  serviceman  also 
is  frequently  guilty  of  showing  the 
actual  manufacturer's  literature  or 
catalog  to  the  set-owner,  pointing 
out  just  what  parts  are  needed.  Now 
if  the  catalog  is  in  terms  of  list 
prices,  there  is  no  particular  harm 
so  far  as  prices  are  concerned.  These 
list  prices  which  provide  a  profit  mar- 
gin for  the  serviceman  by  way  of  his 
trade  discount,  justify  a  certain 
charge  for  parts  as  well  as  labor.  If 
the  printed  prices  were  net,  or  ser- 
viceman's cost,  then  the  set  owner 
would  immediately  feel  he  should 
get  them  at  that  price. 

Of  course  the  whole  idea  of  dis- 
cussing with  the  set-owner  the  spe- 
cific parts  required  is  absolutely 
wrong.  The  serviceman  should  not 
discuss  details — no  more  so  than  a 
doctor  or  surgeon  will  tell  just  how 
the  cure  is  to  be  effected.  The  ser- 
viceman is  the  doctor  or  surgeon: 
the  customer  should  have  full  con- 
fidence in  the  serviceman's  experi- 
ence, skill,  honesty.  How  the  job 
is  to  be  done,  and  what  parts  are  to 
be  used,  is  strictly  the  serviceman's 
own  business.  The  serviceman  must 
assume  the  dignity  of  a  specialist. 
He  must  collect  for  his  experience, 
knowledge,  skill. 

Q.  Should  the  serviceman  show 
the  set  owner  what  parts  require 
replacement? 

A.  Certainly  not.  It's  very  poor 
business  to  show  the  customer  pre- 
cisely what  has  to  be  replaced,  and 
the  required  new  parts,  especially  by 
type  and  values  and  price.  To  do  so 
is  simply  to  encourage  the  set-owner 
to  try  to  buy  the  parts  himself,  and 
do  his  own  servicing.  Remember, 
three  quarters  of  a  servicing  job 
comprises  the  correct  diagnosis.  After 
the  trouble  has  been  ascertained,  the 
rest  is  relatively  simple.  You  can 
talk  in  general  terms  about  a  con- 
denser having  to  be  replaced,  or 
burnt-out  resistor,  a  transformer 
that  is  shot;  but,  don't  come  down 
to  specific  details! 

Q.  Should  defective  parts  be 
turned  over  to  the  set-owner? 

A.  You  can  return  the  defective 
parts  to  the  set-owner  after  the  set 
has  been  serviced  and  bill  rendered. 
This  is  only  by  way  of  supporting  the 
charges  covered  by  the  bill,  espe- 
cially so  if  the  material  costs  run 
unusually  high.  Of  course  if  the 
set-owner  asks  to  have  the  defective 
parts  turned  over  to  him,  it  is 
frankly  an  indication  of  lack  of  con- 
fidence in  your  work  and  charges. 
Consequently,  the  serviceman  should 
do  everything  in  his  power  to  build 
up  a  greater  confidence  in  his  cus- 
tomers. 

Q.  What  are  we  going  to  do  about 
the  set  manufacturer  who  sells  auto- 
radio  sets  directly  to  consumers  at 
no  higher  prices  than  the  serviceman 
pays? 

A.  This  situation,  while  seemingly 
troublesome  at  first,  is  really  quite 
simple  and  eventually  solves  itself. 
The  set  manufacturer  in  such  case 
evidently  has  no  acceptance  in  the 
jobbing  and  retailing  trade,  and 
therefore  uses  price  as  the  sole  in- 
centive to  get  buyers.  The  service- 
man's best  comeback  is  to  ignore  the 


l>EWAtl> 

stresses 

VERSATILITY  •  BEAUTY 
PERFORMANCE 

SINCE  1921  this  fine  name  has  stood 
at  the  forefront  .  .  .  and  our  1939  line 
is  more  varied  than  ever  before!  You 
can't  go  wrong  when  you  merchandise 
the    time-tested    De    Wald    way! 


SENSATION! 
Bantam  in  Colors! 

Truly  a  handful  of  radio  that's  a  mir- 
acle of  tone  and  performance!  Elegant 
styling,  choice  of  colors  in  plastic  cab- 
inetry. High  selectivity  and  sensitivity. 
New  beam  power  output,  illuminated 
duo-colored  dial  —  protective  speaker 
guard  grille,  4  tubes,  general  broadcast 
and  state  police  bands,  166-555  meters. 
MODEL   406. 


MODEL  648 — Sensational,  sensitive  all- 
wave  superhet  with  new  drift-proof 
automatic  mechanical  push  button  tun- 
ing. 7-tube  AC-DC — 2  bands,  16-51  and 
175-555  meters  or  (Model  650)  3  bands, 
12  y2  to  555  meters.  Latest  cabinet  styl- 
ing with  new  organ  grille.  New  type 
duo-colored  slide  dial,  indirect  flood 
lighted.  6'-  2  inch  Dynamic  speaker. 
Beam    power   output. 


MODEL  645  —  Popular  priced  6-tube 
AC-DC.  Hi-gain  superheterodyne.  Duo- 
colored,  easy-vision  slide  dial.  High  ratio 
vernier  tuning.  Multi-purpose  tubes  with 
extra  tube  efficiency.  Beam  power  out- 
put. Large  dynamic  speaker.  Auto- 
matic  volume   control. 

Above  models  and  our  complete  line, 
from  4  to  11 -tube  sets,  available  in  ex- 
port models  in  all  voltages  and  frequencies. 

Write  for  complete   literature 

PIERCE- AIRO,  Inc. 

440  Lafayette  St., New  York, U.S.A. 

Licensed    by    R.C.A.,    Hazeltine,    etc. 
Cable  Address:   DAVWALD   NEW  YORK 


December,  1938 


31 


*EP4 


•  Do  yourself  a  good  turn  .  .  . 
and  let  that  good  old  scout, 
"Old  Man  Centralab,"  help 
you  with  his  ADASHAFT  kit 
.  .  .  housed  in  a  swell  metal 
box,  hinged,  contains  ten 
Midget  Radiohms,  five  types 
of  attachable  shafts,  etc. 

This  kit  will  enable  you  to  do 
some  mighty  fine  "deeds"  for 
more  than  400  different  makes 
of  receivers  .  .  .  actually  thou- 
sands of  different  models.  See 
your  jobber. 


Included  in  the 

ADASHAFT  KIT 

are  the  following :  10  Adashaft 
controls,  5  Midget  Switch 
covers,  6  4-inch  Adashafts,  1 
10-inch  Adashaft,  2  3-inch 
Auto  type  Adashafts,  1  6-inch 
Auto  type  Adashaft,  2  slotted 
Insacups,  2  square  hole  Insa- 
cups,  1  300  ohm  Bias  Resis- 
tor. 5  Ground  Straps,  10  "C" 
Washers,  5  Switch  Insulators, 
and  10  Terminal  Insulators. 
...   1   Instruction  form   648. 


Centralab 

Milwaukee,  Wis. 

Division  of  Globe  Union,  Inc. 

BRITISH    CENTRALAB,    LTD. 
Canterbury   Rd.,    Kilburn 
London   N.W.   6,   England 

FRENCH    CENTRALAB    CO. 
IIS  Avenue   Ledru-Rollin  Paris   XI,    France  1 


SERVICE   NOTES 


line  or  brand  of  set  completely.  He 
should  concentrate  on  accepted 
brands  or  lines,  so  as  to  get  around 
the  low  price  situation  created  by 
the  direct-selling  manufacturer.  The 
same  thing  applied  to  parts  sold  by 
their  manufacturers  direct  to  con- 
sumers at  lowest  prices. 

CONNECTIONS  TO  UNUSED 
TUBE  SOCKET  TERMINALS 

An  important  point  to  remember 
when  tracing  wiring  is  that  frequently 
wiring  or  parts  are  connected  to  tube 
socket  terminals  which  ordinarily 
would  be  unused  since  no  tube  prong 
connects  to  these  terminals.  For  ex- 
ample, a  6K7  tube  has  only  7  prongs, 
thus  there  is  one  unused  socket  ter- 
minal. In  some  sets  such  unused  ter- 
minals are  employed  to  anchor  small 
parts  such  as  resistors  and  condensers, 
also  as  a  junction  point  for  two  or 
more  wires. 


G-E  REMOTE  CONTROL 

In  the  current  line  of  more  expen- 
sive General  Electric  receivers,  remote 
tuning  with  remote  volume  control  is 
featured.  This  control  is  accomplished 
by  extending  the  push-button  tuning 
circuits  by  means  of  a  cable  to  the  re- 
mote control  box. 

Changes  in  the  volume  level  are  af- 
fected through  the  use  of  a  motor  on 
the  volume  control  shaft  as  shown  in 
the  accompanying  diagram.  A  revers- 
ible motor  is  employed  and  controlled 
by  two  switches  on  the  remote  box. 

For  station  selection,  the  usual  type 
of  electric  motor  mechanism  with  a 
split  stator  is  employed.  Because  of 
the  split  stator,  the  device  is  homing 
(goes  directly  to  the  selected  station). 


REMOTE     CONTROL 
UNIT 


For  push-button  tuning  on  the  re- 
ceiver, 13  buttons  are  employed  for 
selection  of  13  stations.  A  14th  but- 
ton turns  the  set  off.  Since  a  latching 
type  of  push  buttons  is  used,  depress- 
ing any  station  key  automatically 
turns  on  the  power  for  the  set. 

The  remote  control  keys  are  non- 
latching  in  order  to  avoid  any  inter- 
ference with  the  buttons  on  the  re- 
ceivers. Only  6  of  the  stations  have 
been  extended  for  the  remote  control 
which  is  plugged  into  a  socket  on  the 
rear  of  the  set.  To  avoid  the  possibil- 
ity of  keeping  the  tuning  motor  run- 
ning by  pressing  two  buttons  simul- 
taneously, single-pole  double-throw 
switches  are  employed  at  both  the  re- 
ceiver and  the  remote  position. 

The  volume  control  motor  electric- 
ity is  derived  from  the  same  trans- 
former as  the  tuning  motor.  It  is  pos- 
sible to  change  the  volume  of  the  set 
only  after  the  station  button  on  the 
remote  control  has  been  released  be- 
cause of  the  interlocking  circuit. 

A  scan  switch  for  rapid  manual 
tuning  from  one  of  the  bands  to  another 
is  provided  on  the  receiver.  It  is  a 
double-throw  switch,  normally  open, 
which  permits  operating  the  motor  in 
either  direction. 

SERVICEMEN  75  PER  CENT 
INDEPENDENT 

A  complete  survey  of  the  22,000  mem- 
bers of  Radio  Manufacturers  Service, 
made  by  Robert  F.  Herr,  manager  of 
the  Philco  parts  and  service  division, 
reveals  that  75.6  per  cent  of  these  ser- 
vicemen are  independent,  with  24.4  per 
cent  working  as  dealers'  servicemen. 
All  of  the  servicemen  who  are  indepen- 
dent do  and  have  done  work  for  deal- 
ers, with  approximately  50  per  cent  of 
them  doing  work  for  dealers  on  a  reg- 
ular basis. 

More  than  60  per  cent  of  the  grand 


TOUCH    TUNING 
K  EYBOARD 


6,5,4,3,2,1 
STATIONS 


VOLUME 

CONTROL 

MOTOR 


13,12,3,2,1 
STATIONS 
STATION 
CONTACTS 


STATION 

SELECTOR 

MOTOR 


Schematic  of  the  wired  push-button  remote  control  used  by  G-E.    Note 

use  of  separate  motor  to  control  volume  and  double-pole  station  push 

buttons. 


32 


Radio  Today 


Coils  mm  Nor  Just  Wire^ 


REMEMBER  this — most  replacement  coils 
.are  built  to  a  plus  or  minus  25%  tolerance. 
Consequently,  certain  radio  sets  which  have  a 
preponderance  of  parts  of  +25%  by  accident 
are  extremely  hot — and  dangerously  near  the 
point  of  oscillation.  These  wide  tolerances 
create  a  serious  problem  because  the  addition 
of  a  +25%  coil  to  a  set  already  too  hot  would 
produce  an  inoperative  condition  of  oscillation. 
Meissner  Coils — built  of  high  quality  ma- 
terials to  the  most  exacting  engineering  re- 
quirements— are  held  to  a  plus  or  minus  S% 
tolerance  and  therefore  are  perfect  replace- 
ment parts  for  any  radio. 

"UNIVERSAL- ADJUSTABLE" 
ANTENNA -R.  F.- 
OSCILLATOR  COILS 

It  is  no  longer  necessary  to 
order  hard-to-get  exact  du- 
plicates when  an  Antenna, 
R.F.  or  Oscillator  coil  needs 
replacing.  These  new  ad- 
justable-inductance Ferro- 
cart  (Iron  Core)  coils  will 
replace  the  Broadcast  Band 
coils  in  practically  any  re- 
ceiver! The  Oscillator  coil 
is  also  designed  to  provide 
complete  adjustment  for 
receivers  having  intermedi- 
ate frequencies  from  175  to 
520  kc.  and  may  be  used  in 
either  cut-plate  tuning 
condenser  or  padding  con- 
denser circuits! 


DOUBLE-TUNED 

I.  F. 
TRANSFORMERS 

This  is  the  ideal  replace- 
ment transformer  for 
Servicemen  and  Experi- 
menters who  demand 
the  utmost  in  I.F.  trans- 
former performance  at  low  cost.  Unusually 
high  gain — extremely  wide  frequency  range 
— and  double- tuned  with  Meissner  Low- Loss 
Ceramic  Bass  Mica  Di-electric  Trimmer 
guarantees  you  a  superior,  more  efficient 
transformer. 

FERROCART  ANTENNA  AND 
R.  F.  COILS 


Constructed  with  Iron 
Core  material  which  adds 
substantial  gain,  and  in- 
creases the  selectivity  of 
radio  frequency  trans- 
formers by  improving  the 
"Q"  of  the  windings. 

These  (Iron  Core)  coils 
are  designed  to  cover  the 
broadcast  band  (540  to 
1600  kc)  with  a  365  mmf 
condenser.  Will  work  with 
any  of  the  standard  types 
of  tubes,  including  metal 
and  the  battery-operated 
2-voIt  series. 


SEE  YOUR  PARTS  JOBBER 
OR  WRITE  DEPT.  T-12 
MT.  CARMEL,  ILL. 


MT.  CARMEL,  ILLINOIS 

"»      FAMOUS      NAME      FOR      TWO      DECADES'' 


December,  1938 


33 


VOLUME  IX 


RIDER  MANUAL 

JUST  OFF  PRESS 


ANOTHER  great  Rider  Manual— Vol- 
L  ume  IX,  covering  1938-39  American- 
made  radio  sets.  Here  is  one  of  the  most 
important  volumes  of  them  all.  Every 
serviceman — bar  none — will  need  it.  At 
your  finger  tips  are  1650  pages  of  the  most 
complete  and  authentic  compilation  of 
service  data  available  in  the  industry. 
Rider  Manual  Vol.  IX  features  an  entirely 
new  "How  It  Works"  Section — the  most 
"talked-of"  feature  of  Vol.  VIM.  It  makes 
clear  by  practical  example  the  complicated 
circuits  and  baffling  service  problems  which 
you  must  cope  with  in  repairing  modern 
radio  sets.  There  is  also  a  new  140-page 
index.  Put  this  great  volume  to  work  for 
you  right  away,  —  place  your  order  with 
your,  jobber  without  delay. 

Vol.  IX  -510.00-Covering  1938-19 
Vol.  VIII— StO.OO-Covering  193748  Vol.  IV  -t7.S0-Coverlne  1933-34 
Vol.  VII  -  10.00-Covering  I93S-37  Vol.  Ill-  7.5O-0overing  1911-11 
Vol.  VI  —  7.50-Covering  1935-36  Vol.  II  -  7.S0-Covering  1911-12 
Vol.V    -   7.50-Coverinj  1934-15     Vol.1  -  7.50-Covering  1910-31 


OTHER    RIDER    BOOKS 


AFC  SYSTEMS— 144  pp.  Hard  Covers $1.00 

CATHODE  RAY  TUBE— 366  pp.  450  illus.  .  .   .  $2.50 

Other  Rider  Books:  Servicing  Superheterodynes;  Align' 
ing  Philco  Receivers—  SI. 00  each.  "Hour  a  Day  with 
Rider"  books  on  A  VC  Control;  on  Resonance  &  Align- 
ment;  on  A-C  Distribution  in  Radio  Receivers;  on  D-C 
Distribution— 60c  for  each  book. 


IN    F.    RIDER,    Publisher 

404  Fourth  Ave 


The  Meissner  remote  control  adapter  works  on  the  converter  principle. 


total  of  servicemen  surveyed  are  en- 
gaged in  the  selling  of  new  radios.  In 
addition,  80  per  cent  of  the  remainder 
signified  their  desire  and  ahility  to 
sell  new  radio  sets  if  they  could  obtain 
a  proper  and  equitable  remuneration 
arrangement  with  the  dealer. 

WIFE  SOLVES  PROBLEM 
OF  ONE-MAN  SHOP 

Ruperto  Cruz  has  solved  the  one- 
man  radio  shop  problem  by  teaching 
his  wife,  Emilia,  the  mysteries  of  ser- 
vicing and  testing.  While  he  calls  on 
200  or  more  customers  in  New  York's 
Greenwich  Village,  Mrs.  Cruz  tends 
their  store  at  326  West  4th  Street,  does 
housework  and  still  finds  time  to 
check  tubes,  condensers,  resistors  and 
do  minor  repairs. 

New  customers  often  are  amused  to 
find  a  woman  pulling  a  set  apart  to 
find  what  ails  it.  But  they  soon  dis- 
cover Mrs.  Cruz  knows  her  stuff. 

Besides  "knowing  radio"  Mrs.  Cruz 
has  some  definite  ideas  on  selling  and 
servicing.  Her  bright  smile  and  hon- 
est opinions  have  helped  bring  many 
customers  in  the  ten  years  the  Cruzes 
have  been  in  the  same  store,  and  she 
is  a  firm  believer  in  the  "square  deal." 
She  thinks  manufacturers  should  style 
their  radios  more  with  an  eye  to  the 
woman  buyer.  And  she  believes  the 
table-size  combination  set  is  to  be  the 
big  seller  in  1939  for  apartment  dis- 
tricts like  the  Village. 

The  Cruzes  have  found  direct-mail 
advertising  gives  the  best  results. 
Bach  October  (the  time  when  every- 
one in  New  York  moves)  they  dis- 
tribute business  cards  and  handbills, 
using  an  old-time  Greenwich  Village 
resident  to  do  the  job.  He  "talks  up" 
their  shop  with  the  folks  he  knows 
and  at  the  same  time  drops  a  reminder 
to  new  residents.  The  Cruzes  __  also 
send  out  reminders  twice  a  year,  ad- 
vising a  check-up  of  sets  and  stressing 
the  free  tube-testing  angle  of  their  ser- 
vice. 


MEISSNER  REMOTE  CONTROL 

The  remote  control  unit  offered  by 
Meissner  can  be  used  on  any  type  of 
radio  set,  since  it  operates  on  the  con- 
verter principle. 

The  remote  control  unit  is  connected 
to  the  antenna  wire  at  the  set  and  the 
output  of  the  unit  connected  across  the 
antenna  and  ground  posts  by  means 
of  a  cable.  Power  is  obtained  from  the 
nearest  electrical  outlet  and  may  be 
AC  or  DC.  The  circuit  is  shown  here- 
with. 

Inductance-type  tuning  is  employed 
in  both  the  antenna  and  oscillator  cir- 
cuits. To  simplify  station  set  up,  the 
two  circuits  are  ganged  together,  thus 
requiring  only  one  adjustment  per  sta- 
tion. 

The  usual  type  of  station  selecting 
switch  having  a  latch  bar  is  employed. 
The  off  position  turns  off  the  power  to 
the  control  and  transfers  the  antenna 
from  the  converter  input  to  the  output 
circuit  which  goes  to  the  receiver. 

Volume  control  is  incorporated  in 
the  device  which  permits  changing  the 
gain  of  the  converter  tube.  This  con- 
trol is  connected  to  the  antenna  and 
cathode  circuits. 

In  operation  it  works  just  like  the 
converter  in  any  superhet  receiver.  The 
radio  set,  which  is  connected  to  this 
remote  control,  is  tuned  to  an  unused 
channel  in  the  broadcast  band  at  the 
low-frequency  end.  When  operated 
with  a  super  receiver,  the  combination 
becomes  a  double  superheterodyne  re- 
ceiver. If  used  with  a  T.R.F.  set,  the 
combination  is   a  superheterodyne. 

Because  it  operates  as  a  converter 
and  is  connected  to  the  antenna  cir- 
cuit, it  may  be  employed  with  any  re- 
ceiver without  changes  in  the  set. 

SERVICING  IS  SELLING 

*•  The  radio  service  man  must  re- 
gard himself  as  a  man  in  the  retail 
business  if  he  is  to  succeed  to  any 
appreciable  extent,  declared  Robert 
F.  Herr.  manager  of  the  parts  and 
service  division  of  Philco.     He  ampli- 


34 


Radio  Today 


LOW 
PRICE 


...is  only  one  reason  why 
YOU'LL  SELL  LOTS  OF 
THESE  RCA  MIKES! 


RCA  JUNIOR  VELOCITY  MICROPHONE 


Recommend  this  mike  to  those  who  want  the  best  at 
low  cost.  It's  the  finest  popular  priced  microphone 
RCA  has  ever  created.  Provides  peak  performance, 
is  attractive,  and  offers  the  rugged  construction  and 
long  life  of  RCA  Velocity  Microphones.  AInico  mag- 
nets are  used  to  provide  exceptionally  high  signal- 
to-noise  ratio.  Is  adaptable  to  most  input  circuits 
because  of  three  output  impedances.  And  it  costs 
only  $43  50  list,  less  stand. 


RCA  AERODYNAMIC  MICROPHONE 


Here's  a  P.  A.  winner!  It  costs  only  $26.50  list,  less 
stand.  Is  so  small  it  can  be  easily  carried  in  the  palm 
of  your  hand.  Yet  has  quality  features  including  ex- 
cellent frequency  response,  fine  tone  and  high  sensi- 
tivity. Is  used  to  good  advantage  for  close  talking. 
Has  new  AInico  permanent  metal  magnet.  Requires 
no  external  excitation  of  power. 


Sep  your  neareBt  RCA  Com- 
mercial Sound  Distributor 
for  the  new  RCA  Sonnd 
Catalog,  or  write  direct  to 
the  address  below. 


ANY  SOUND  SYSTEM  SOUNDS  BETTER  EQUIPPED  WITH  ECA  RADIO  TUBES 

Listen   to   the    "Magic   Key"   every   Sunday, 
2  to  3  p.m.,  E.S.T.,  on  NBC  Blue  Network 


RCA  MANUFACTURING  CO.,  INC.,  CAMDEN,  N.  J. 
A  Service  of  the   Radio  Corporation  of  America 


FOR    SCHOOLS 


*  Here  is  a  sclden  opportunity 
for  Dealers  and  Servicemen.  The 
Bogcn  Junior  is  expressly  designed 
to  enable  schools,  hotels,  institu- 
tions. Department  Stores,  etc.,  to 
have  the  combined  facilities  of  an 
intercommunication  system  and 
allwave  radio  tuner  plus  provision 
for  a  phonograph  input  all  in  one 
deluxe  unit.  Here  are  some  of  its 
desirable  Features. 

•  Provision  for  Remote 
Control 

•  Visual   Volume   Indicator 

•  Talk-Back    Operation 

•  Selective  or  group  call- 
ing 

•  Master    emergency 
switch 

•  Frequency  equalizer  for 
tone 

•  Expansion    Capacity    up 
to  32  rooms 

These  units  are  furnished  with  a  steel  door  and  fool-proof  lock  not  shown  in 
illustration.  Speakers  housed  in  beautiful  walnut  baffles  designed  for  tilt* 
angle  wall  mounting  to  assure  correct  acoustics.  Bogen  school  systems  have 
the  approval  of  leading  educational  institutions  throughout  the  country. 
See.your  Jobber  at  once  or  write  direct  for  Descriptive  Literature  to  Dept.  RT. 


Model    S-32 


DAVID  B0GEI1 


CO.  663  BROADWAY 
inC.  NEW  YORK,  N.Y. 


The  man  we're  looking  for  has 
a  successful  radio  service  busi- 
ness. His  location  is  free  from 
interference  with  already  es- 
tablished Tung-Sol  agents.  He 
has  the  technical  knowledge 
and  equipment  to  sell  radio 
lubes.  He  turns  his  tube  slock 
over   every   three    or    four 
months.  He  has  a  clean,  at- 
tractive   establishment    in 
which  to  use  display  mater- 
ial. He  maintains  standard 
prices.  He  will  systematically 
make  monthly  reports  of  con- 
signed stock  with  remittance 

for  tubes  already  sold.  He  has 
the   foresight   and   judgment 

to  appreciate  an  unusual  prop. 

osition  which  multiplies  his 
lube  profits  without  tying  Up 
capital.  Maybe  You're  the 
Man.  If  YOU  think  you  ^ 
write  for  details. 


JUNG-SOL 

•niBEsKi^?^ 


^NG-SOl   LAMP  WORKS,  (ne. 

Radio  Tube  Division 
Soles  Offices  •  Atlnn,„ 

Denver.  De.ro,?.  K  h'C°9°    "    D°"°* 

N- York.   Genero7oa'Ci'y-L- Ange.es 
"onera.  Offices:  Newark,  N.J 


December,  1938 


THE  ONE 


LINE 


AERO  VOX,  Hi  to  null 
your  local  jobber,  of- 
fers you  every  type 
of  essential  con- 
denser. 


ELECTROLYTICS 

Largest  variety  of  metal- 
ean  dry  eleetrolytics 
produced  by  pioneers  in 
this  field. 


Wet  electrolyties  in  pop- 
ular voltage  ratings  and 
eapaeities.  Ingenious 
venting.     \o   leakage. 


CARDBOARD-CASE 

Cardboard-case  dry  electrt»- 
lytics.  Large  and  small  sizes. 
Handy  universal  mounting 
flanges. 


PAPER 


Uncased,  metal-case,  bake- 
lite  -  case  units.  Ru  b  b  e  r  - 
molded  units.   Paper  tubulars. 


TRANSMITTING 

Transmitting  condensers  in 
oil  -  filled  and  wax  -  filled 
types.  Round  and  rectan- 
gular cases. 


MICA 

Thirteen  different  types  of 
molded  mica,  metal-case, 
and  porcelain-case  mica  ca- 
pacitors. 


PADDING 

Padding  mica  condensers 
for  accurate  capacity  set- 
tings. 

AUTO   RADIO 

Also  auto-radio  condens- 
ers, noise  eliminators, 
etc.,  etc. 


CATALOG:  Ask  looai  jobber  or 
v»  rite  us  for  latest  edition.  Covers  larg- 
est line  of  condensers  and  essential  re- 
sistors. 

Overseas  inquiries  invited.  Cable  ad- 
dress:  RADIWAC. 


EKoym 


CORPORATION 


70  Washington  St 


Brooklyn,  N.  Y. 


■M.U)H.»*»:I.IIJ.U1J  HI  1.1  ■■IBM.— I HWBW 

36 


SERVICING  SETS 


fled  his  statement  by  explaining  that 
the  service  man  is  really  selling  mer- 
chandise, whether  it  be  service,  repair 
or  parts,  and  that  the  use  of  modern 
merchandising  methods  would  insure 
success. 

"The  serviceman,  these  days,"  said 
Herr,  "is  becoming  more  promotion- 
minded  if  he  intends  making  more 
than  just  a  mere  existence.  He  must 
take  every  advantage  of  sales  possi- 
bilities to  supplement  his  income  from 
what  is  strictly  service  repair  work. 
He  must  be  on  the  alert  for  new  cus- 
tomers to  take  the  place  of  those  he 
has  lost  through  changes  of  residence 
or  other  reasons. 

"To  expand  his  business  the  service 
man  should  formulate  some  definite 
plan  of  action  and  follow  it.  For  ex- 
ample, he  could  prepare  monthly  lists 
of  his  customers  who  should  have 
new  tubes  in  their  sets  or  who  might 
stand  in  need  of  a  new  aerial.  There 
are  those  who  could  be  canvassed  for 
extension  speaker  installations,  talk- 
back  sound  systems  or  public  address 
equipment.  Once  such  lists  are  made 
it  is  imperative  the  service  man  go 
out  and  sell  them. 

"The  serviceman  should  advertise 
the  fact  that  he  is  qualified  for  com- 
plete radio  service  and  guarantees 
satisfactory  results.  He  should  avail 
himself  of  all  the  advertising  and 
sales  helps  placed  at  his  disposal  by 
the  various   radio   companies. 

"To  prosper,"  Herr  concluded,  "the 
serviceman  must  be  wise  enough  to 
apply  to   himself  the   same   principles 


any  successful  business  man  must 
follow — advertise,  promote,  sell  and 
profit." 

LOUD  SPEAKER  RATTLES 

Distortion  and  rattles  in  sets  may 
be  traced  to  sources,  such  as 

(1)  Foreign  particles  in  speaker 

(2)  Damaged  or  defective  speaker  cone 

(3)  Loose  voice  coil 

(4)  Voice  coil  off-center 

(5)  Loose  grille  cloth 

AUTOMATIC  TUNING 
BEST  ON  LOCAL  STATIONS 

Generally  speaking  automatic  tuning 
radio  sets  should  be  set  up  only  for 
nearby  stations  or  ones  that  provide  a 
strong  signal  at  all  times. 

In  the  case  of  sets  using  AFC  it  is 
imperative  that  stations  that  fade  or 
with  low  signal  strength  be  tuned  in 
manually.  When  automatic  tuning  is 
used  for  station  tuning,  it  is  necessary 
that  the  station  have  sufficient  strength 
to  operate  the  AFC  and  correct  the  in- 
accuracies in  tuning.  Also  the  station 
should  not  be  subject  to  fading  for  a 
stronger  station  on  an  adjacent  fre- 
quency may  intercept  the  automatic 
frequency  control  during  fading  of  the 
desired  station — this  means  that  the 
set  would  change  stations  of  itself. 

Users  of  automatic  tuning  sets 
should  be  informed  that  it  is  prefer- 
able to  tune  the  weak  or  fading  sta- 
tions manually  and  reserve  the  push 
buttons  for  stations  with  reliable  re- 
ception. 


CHRONOLOGY  OF  A  BIG  IDEA 

February  1938       Dynamic  Testing   principles   outlined   and   recommended   by 

RADIO  TODAY 
March  1938  Vinton  K.  Ulrich,  Technical  Editor  of  Radio  Today,  talks  before 

local  service  groups  on  dynamic  servicing 
July  1938  Prominent  service  instrument  manufacturer  sponsors  dynamic 

testing 
August  1938         Second    service    instrument    manufacturer    incorporates    basic 

principles  of  dynatesting  in  instruction  manual 
September  1938    Another  trade  magazine  features  article  on   "Dynamic  and  or 

Static  testing,"  admitting  need  for  dynatesting  procedure 
September  1938    Instrument  manufacturer  presents  talks  to  servicemen's  organ- 
izations on  complete  dynamic  testing 
October  1938       Third  instrument  manufacturer  advertises  versatile  instrument  for 

dynamic  testing 
October  1938       Chicago  servicemen's  group  advocates  adoption  of  final  test 

procedure  using  dynamic  servicing  principles 
November  1938    RADIO  TODAY  publishes  10th  article  on   dynamic  testing 


Radio  Today 


GUARANTEED 
Si 


StMED  ana  TESTED 
VOUR  PROTECTS 


New  Sales  Aid  Catalog 

Ask  your  RCA  Radio  Tube  dis- 
tributor for  a  copy  of  the  new 
1939  Sales  Aid  Catalog.  Contains 
many  interesting  pages  of  sales 
help  for  your  use. 


RCA  feels  that  every  radio  service  dealer 
is  not  only  entitled  to  constructive  mer- 
chandising assistance  but  should  expect 
100%  cooperation  from  the  maker  of  his 
tubes.  In  1938  RCA  gave  this  cooperation 
and  will  continue  to  do  so  during  1939- 
You  do  not  have  to  use  extra  selling  effort 
"to  get  the  goods  across"  because  the  public 
acceptance  for  RCA  Radio  Tubes,  backed 
up  by  sound  promotional  programs,  will 
do  it  for  you.  So  stock  these  tubes  and  we'll 
help  you  sell  them. 

Over  325  million  RCA  Radio  Tubes  have  been  pur- 
chased by  radio  users  ...  in  tubes,  as  in  radio  sets,  it 
pays  to  go  RCA  All  the  Way. 

Listen  to  the  Magic  Key  every  Sunday,  2  to  3  P.  M.,  E.  S.T., 
on  the  NBC  Blue  Netivork 


CA  Manufacturing  Co.,  Inc.,  Camden,  N.  J. 
A  Service  of  the  Radio  Corooration  of  America 


•  •  •  • 


•  •  •  •  • 


MODEL 
RC6 


PICTURE  OF 

SOARING  SALES 

"Garrard"  Automatic  Record 
Changers  and  phonographic 
equipment  mean  more  sales  for 
YOU.  Ask  for  "Garrard"  units  in 
the  phono-radios  you  carry  (lead- 
ing manufacturers  use  them  on 
request)  or  feature  "Garrard"  for 
custom  assemblies  and  moderni- 
zation jobs.  Cash  in  on  the  de- 
mand for  quality  record  playing 
equipment.  Push  "Garrard"  for  an 
"all-time  high"  sales  chart.  Write 
for  free  catalog  No.  53M. 

GARRARD  SALES  CORP.  17  WARREN  ST.,  NEW  YORK,  N.Y. 


TUBE  TESTER 

Checks  All   Types   Radio 
Receiving  Tubes 


only 

^21.60 

COMPLETE  IN 

QIMRTERED-OAK 

CASE 


«  Uses  Attractive  Triplett 
Direct  Reading  Instru- 
ment 3"  Size.  (GOOD- 
BAD)  Scale. 
O  Line  Voltage  Adjustment 
#  New  Improved  Low  Lass 
Switch 

Suitable  for  counter  or  portable  use.  Slopine  etched  panel 
of  silver  and  black. 

Model  431    $15.90 

Checks  all  receiving  tubes.  (No  ballast  test. )  Tester  uses  de- 
pendable Beadrite  Meter.  Quartered- Oak  case  same  as  for 
Model  432.   Write  for  Catalog — Suction    1219  College  Ave. 

READRITE  METER  WORKS      Bluffton.  Ohio 


SERVICING 

"MAKE  PHONE  CALLS  AND 
VISITS,"  SAYS  NIGRO 

A  business  built  upon  a  careful 
and  thorough  "follow-up"  system  ac- 
counts for  the  success  of  the  Radio 
Sound  Engineering  Corporation,  of 
Madison,  New  Jersey,  in  a  town  where 
direct  selling  methods  have  failed,  ac- 
cording to  John  Nigro,  proprietor.  His 
service-selling  program  is  built  mainly 
upon  a  checking  system  which  includes 
periodical  telephone  calls  and  visits  to 
homes. 

The  major  part  of  the  business  of 
Radio  Sound  Engineering  is  secured  in 
this  manner.  In  a  suburban  town 
where  residents  prefer  to  buy  rather 
than  to  be  sold,  Mr.  Nigro  has  found 
the  answer — a  service  program  which 
proves  to  be,  in  this  instance,  a  valu- 
able set-selling  program  as  well. 


STANDARDIZED  FINAL  TEST 
PROCEDURE 

The  adoption  of  a  universal  standard 
of  final  test  procedure  for  radio  ser- 
vice shops  affiliated  with  the  Radio 
Servicemen  of  America  is  advocated  by 
Lewis  P.  Evans,  Chairman  of  the  Shop 
Standards  and  Practice  Committee  of 
the  Chicago  Chapter. 


A  thoroughly  standardized  and  com- 
plete final  test  of  repaired  receivers 
would  lift  RSA  shops  immediately  a 
considerable  notch  above  the  general 
service  level  in  public  estimation, 
holds  Evans,  and  assure  not  only  com- 
plete customer  satisfaction  through 
guaranteed  "good  as  new"  perform- 
ance, but  give  needed  protection  to 
shops  against  come-backs  and  dissatis- 
faction as  well.  Further,  contends 
Evans,  such  final  testing  could  readily 
be  sold  to  the  public  as  an  increase  to 
the  average  service  check. 

In  sponsoring  this  idea,  Evans  is 
parallelling  the  recommendation  re- 
cently offered  the  service  fraternity  by 
Kendall  Clough,  president  and  chief 
engineer  of  the  Clough-Brengle  Co.,  in 
his  new  book  on  "Complete  Dynamic 
Testing,  Step-by-Step,  with  Cathode 
Ray," 

This  advocated  standardization  of 
test  procedure  should  be  of  interest  to 
readers  of  Radio  Today  who  have  been 
following  the  monthly  Dynamic  Test- 
ing articles  which  started  with  the 
February  1938  issue. 


Silvertone   1640 


Hiss 


*  Some  amount  of  trouble  may  be 
caused  by  the  type  83  rectifier  tube 
used  in  this  set.  Insert  a  choke  coil 
in  the  red  plate  lead  of  the  83  tube 
circuit.  A  5  or  10  millihenry  value 
will  suffice.  It  may  he  necessary  to 
use  a  choke  in  the  other  plate  lead  as 
well.  Usually  one  is  enough,  but  two 
will  always  cure  the  trouble. 


te,hee«».l»gl'^theimote  Cm       rf  j*n»o»» 
I  const"*0       "  „  comPlete       vbib  b°m 

^agtvet  and  e\ec  prollt  p°  used  s 

*  .?  lnvesUg^^.naudagtap^  ^utac 

lutelS  ,._^hCorp..      /  M 


lutelS  „Dh  Corp- 


LJi 


CINAUDAGRAPH    CORPORATION 

STAMFORD.  CONNECTICUT 


38 


Radio  Today 


BRIDGEPORT  JOINS  RSA 


RSA  reports  the  affiliation  of  the 
Greater  Bridgeport  Radio  Service 
Men's  Association  of  Bridgeport. 
Conn.,  under  the  direction  of  L.  F. 
Gravlin,  chairman;  A.  H.  Stendahl, 
secretary;  and  Herbert  C.  Eisenman, 
treasurer. 

Other  groups  that  have  signified 
their  intention  of  joining  the  RSA  are 
Fort  Wayne.  Ind.;  Springfield.  Jack- 
sonville, and  DeKalb,  all  of  Illinois. 


Chapter  news 

Buffalo,  X.  Y. — Officers  were  nom- 
inated for  the  election  to  be  held  in 
December.  Clarence  Redstone,  in- 
structor at  Buffalo  Technical  Insti- 
tute, spoke  again  on  "Radio  Service 
and  Theory."  Norman  Schmeltz 
walked  home  with  the  membership 
prize  money. 

Pontiac,  Mich. — Members  report 
great  success  in  their  campaign  to 
fix  up  charity  sets. 

Green  Bay,  Wis. — A  large  group 
attended  the  first  annual  banquet  at 
White  La  we  on  Nov.  29. 

Danville,  111. — A  weenie  roast  and 
picnic  was  held  for  members  and 
their  families.  Russ  Lund  of  Clough 
Brengle  spoke  on  "Dynamic  Testing." 
Xine  new  members  were  accepted. 

Peoria,  IU. — The  chapter  is  using 
a  cooperative  newspaper  ad,  news 
stories  and  pictures  to  tell  of  the 
work  and  stability  of  RSA  members. 

Washington,  D.  C. — Xine  new 
members  were  voted  into  the  chap- 
ter; a  board  of  directors  with  Jo- 
seph B.  Austin,  Jr.,  president,  was  or- 
ganized. 

New  Bedford,  Mass. — Election  of 
officers  will  be  held  following  an  en- 
gineering lecture  at  the  December 
meeting. 

Chicago — Classification  of  member- 
ship is  going  ahead  under  the  direc- 
tion of  Harold  Cunningham. 

New  York  City — Officers  were  nom- 
inated for  election  on  Dec.  28.  George 
Conner,  of  Hygrade  Sylvania  Corp., 
illustrated  methods  of  improving  tone 
quality  of  radios  by  minor  output  cir- 
cuit changes  at   the  Nov.   28   meeting. 

Flint,  Mich. — The  chapter  has  al- 
most a  100  per  cent  membership 
among  local  servicemen  and  is  using 
cooperative  advertising  to  boost  RSA 
members. 

Duluth,  Minn. — The  popular  round 
table  discussions  continue. 

Abilene,  Tex. — At  the  next  meeting 
members  are  to  submit  a  suggested 
list  of  prices  to  compile  a  standard 
minimum  price  for  all  types  of  radio 
work. 

Boston — Glen  Browning  spoke  on 
servicing  with  the  scope  and  vacuum 
tube  voltmeter.  On  Nov.  21  a  gadget 
meeting  was  held  when  members  ex- 
changed ideas  on  service  instruments 
and  tricks.  On  Dec.  4  George  Con- 
nors of  Sylvania  spoke. 


Do 


enow   how 


to  the  minute 
with   latest   high 
efficiency   test 
equipment  .  .  .  th< 

II  AT  mil  A  i      UNION 


NATIONAL  UNION  WAY? 


HERE'S  WHAT  YOU  DO: 


Select 

want. 


the      equipment      yon 


2.  Sign  n  National  Union  tube 
and/or  condenser  purchasing 

agreement. 

3.  Place  a  small  deposit  which 
will  be  refunded  to  you  as 
a     merchandise     credit    when 


your     purchasing     agreement 
is    completed. 

4.  Order  a  small  quantity  of 
National  Union  tubes  and/ 
or  condensers  at  the  time 
you  sign   the   agreement. 

5.  Apply  your  regular  monthly 
purchases  of  tubes  and  con- 
densers against  the  require- 
ments  of   the   contract. 


Come  On!     Build  Customer  Confidence 
ith   NATIONAL  UNION  TUBES  and  CONDENSERS! 
FOR  NAME  OF  NEAREST  DISTRIBUTOR  WRITE 
NATIONAL  UNION   RADIO  CORPORATION 

NEWARK,   N.  J.  RT-1238 


MTfflfffin     The  Original  and  Only 
ITlUIlLljIlIl  Complete  Line  of 

•  CLIPS  • 

•  Alligator  Clips      •   Wee-Pee-Wee  Clips 

•  Copper  Clips         *   300  Ampere  Clips 

•  Insulated  Clips      •   Insulated  Grid  Clips 


KNOWN   FOR  30  YEARS  AS  THE  BEST  MADE! 


Send  for  Free  Samples  and  Catalog  980 


1573  E.  31st  Street 


Cleveland,  Ohio 


December,  1938 


39 


EVERYTHING  IN  RADIO! 


A  COMPLETE  SOURCE  FOR  YOUR  RADIO  NEEDS! 

Our  immense  stock  of  radio  sets,  parts  and  sup- 
plies enables  you  to  purchase  your  entire  needs  on 
one  order.  The  Big  BA  catalog  is  an  encyclopedia 
of  the  Radio  Industry.  You  will  find  all  your  Nat- 
ionally Known  Favorites  shown  in  this  Book  and 
it's  FREE  for  the  asking.  BA  service  is  better  than 
ever— practically  every  order  is  shipped  the  same 
day   it   is   received. 

Write  for  Big  New  Wholesale  Catalog 


BURSTEIN-HPPLEBEE  CD. 


1012-14  McGEE  STREET 

Kansas  City,  Missouri 


« 


The  flexibility  of  Triplett's  push-button  (jg 
design  makes  it  easy  to  handle  new  ^ 
tubes  such  as  those  with  the  loctal  base 
— another  proof  of  the  non-obsolescence 
features  of  these  models.  A  spare  socket 
and  the  push-button  testing  capabilities 
make  it  a  simple  matter  to  obtain  the 
proper  connections  between  elements. 
Testers  purchased  prior  to  the  introduc- 
tion of  the  loctal  tubes  can  be  brought 
up-to-date  replacing  the  spare  socket 
and  making  a  few  simple  connections, 
for  which  complete  instructions  are 
supplied. 


OJVL.Y 

$3goo 

in  carrying 
case 


MODEL 
1610 


•  Tests  All  Receiving:  Tubes,  Including 
the  new  1.5  Volt  and  50  Volt  Series; 
the  small  loctal  base  tubes  ami  the 
oy,4    and    other    gaseous    rectifiers. 

•  Ballast   Tube   Continuity  Test 

•  Separate  Plate  Tests  on  Diodes  and 
Rectifiers 

•  Uses  Approved  Emission  Circuit  Con- 
structed   to    RMA    Load    Requirements 

•  Neon   Short  Test 

•  Illuminated  Dial  and  BAD-GOOD  Scale 

MODEL    1611 

Combines     push-button     Volt-Ohm-Milli- 
ammeter  with  Tube  Tester  of  Model  1610, 
in    same    type    case.      Uses    plug-in    type 
copper  oxide   rectifier. 
Dealer    Net    Price $49.50 


PudJt 
Buttcui 

TUBE 
TESTER 


ir  Beautiful  metal  case,  black 
velvet  electro  finish  with  chrome 
fittings.  A  tester  you  will  be 
proud  to  operate  and  proud  to 
show. 


ELECTRICAL    INSTRUMENTS 


This  new  push-button  tester  catches  the 
eyes  of  everyone.  Compact  in  size,  light  in 
weight  and  sturdily  built  with  all  wiring 
in  orderly  cable  form,  it  can  be  handled 
easily  and  safely.  The  new  black  velvet 
finish  case  with  chrome  fittings  and  the  at- 
tractive colored  buttons  create  an  atmos- 
phere of  distinction  and  ultra  modernness 
whether  the  tester  is  used  on  the  counter, 
in  the  shop  or  on  call  in  the  home. 
Dealer  Net   Price $39.00 

SEE  THEM  AT  YOUR  JOBBER  or  WRITE! 

I    THE  TRIPLETT  ELECTRICAL  INSTRUMENT  CO. 
|    1912    Harmon    Ave.,    Bluffton,    Ohio 
I    Please    send    me    more    information    on 

□  Model  1610  □  Model  1611 

I   Name     

I    Address      

|   City state 


SALES  HELPS 


DRAKE  DISPLAY 


To  increase  jobber  sales  of  dial  and 
jewel  light  assemblies,  the  Drake  Mfg. 
Co.,  1713  W.  Hubbard,  Chicago,  has 
released  a  dramatic  counter  display 
card  which  seizes  attention  and  also 
simplifies  ordering.  By  showing  all 
sizes  and  mountings  available,  the 
card  helps  the  customer  decide  on  ap- 
propriate supplies.  The  Drake  trade- 
mark is  featured,  in  a  cunning  figure 
of  a  duck. 


HANG  UP  A  NEW  NAMEPLATE 

From  Hygrade  Sylvania  Corp.  now 
comes  a  newly  designed  outdoor  sign, 
so  that  dealers  may  say  "Complete 
Radio  Service"  and  "Set-tested  tubes" 
to  passersby.  Flange  style,  it  is  green 
and  white,  and  takes  a  nameplate 
hooked  at  the  bottom  for  the  dealer's 
imprint.  Overall  sign  height,  with 
hanger  is  16". 

Sylvania  has  also  supplied  its  job- 
bers with  a  Christmas  streamer,  free 
to  dealers,  a  30"  x  12"  splash  of  color 
suggesting  that  "for  a  merrier  holiday 
season,  install  new  radio  tubes."  This 
gives  merchants  a  chance  to  get  Santa 
Claus  promptly  into  store  display  and 
to  link  him  with  tube  sales. 


"MAGIC  DISPLAY"  BOOSTS 
SALE  OF  VICTROLAS 


RCA  has  a  "magic"  display  unit  for 
dealers  that  promises  to  cause  plenty 
of  consumer  interest. 

A  customer  steps  up  to  inspect  a  Vic- 
trola  and  the  device  automatically 
starts  the  instrument.  Outside  the 
store,  passersby  pause  to  look  at  Nip- 
per, the  Victor  dog.  "Touch  me  and 
I'll  talk  to  you,"  reads  a  card  fastened 
to  his  collar.  Someone  tries  it — and 
Nipper  invites  him  inside  to  inspect 
the  latest  models. 

Other  stunts  can  be  worked  on  the 
display,  RCA  says.  The  unit  is  electro- 
statically operated  and  consists  of  a 
series  of  relays.  Display  layout,  plus 
"magic"  demonstration  unit,  cards  and 
sales  talk  costs  $8.  The  giant  size 
model  of  Nipper  is  priced  at  $15. 


40 


Radio  Today 


MIKE  GETS  A  BREAK 


TRADE  TREATY  CUTS 
TARIFF  ON  RADIOS 


A  boost  for  the  "Uniplex"  uni-direc- 
tional  crystal  microphone  appears  in 
a  new  two-color  display  card  released 
by  Shure  Bros.,  225  W.  Huron  St., 
Chicago.  This  is  a  snappy  item  for 
jobbers'  counters,  dramatizing  the 
pickup   discrimination  of  the   Uniplex. 


Freed  Transformer  Co.  is  now  pack- 
aging its  products  in  attractive  three- 
color  container.  Merchandise  in  each 
box  is  plainly  marked  and  package 
adds  to  looks  of  jobbers'  and  dealers' 
shelves. 


A   NEW  SERIES  OF 

3  BALLASTRONS 


has  solved  the 
problem  of  ballast 
tube  replacements.  These  new 
BALLASTRONS,  known  as  types  X, 
Y,  Z,  will  serve  as  perfect  replace- 
ments for  98%  of  all  four  prong 
and   octal   base   types    in   use   today. 

Ask  your  jobber.  .  .  .  Get  the 
MICAMOLD  catalog.  .  .  .  Specify 
MICAMOLD  BALLASTRONS,  Tub- 
lyiios.  Molded  Paper  Condensers, 
etc.  .   .  . 

There's  more  money  in  radio  ser- 
vicing with   MICAMOLD   products! 

• 

MICAMOLD  RADIO  CORP. 

Hushing  &  Porter  Aves.,  Brooklyn,  N.  Y. 


The  new  trade  pacts  with  Great 
Britain  and  Canada  will  affect  the  ra- 
dio industry  very  little,  the  Depart- 
ment of  Commerce  asserts  in  analyz- 
ing the  treating  for  RMA.  They  be- 
come effective  Jan.  1,  1939,  for  three 
years. 

A  British  tariff  of  33H  per  cent  on 
American  amplifiers,  loud  speakers  and 
radio-combination  sets  is  cut  to  25  per 
cent.  The  U.  S.,  in  return,  slices  its 
tariff  from  35  to  25  per  cent  on  British- 
made  radios  and  from  22  per  cent  to 
17  on  their  gramophones.  Canadian 
rates  remain  as  is.  The  British  treaty- 
does  not  affect  Australia,  New  Zealand, 
Africa,  Ireland  and  other  possessions. 

CORNELL-DUBILIER  TIES  UP 
WITH  FOREIGN  FIRMS 

Announcement  has  been  made  by 
Octave  Blake.  Jr.,  president  of  Cornell- 
Dubilier  Electric  Corporation,  and 
H.  M.  Pease,  vice-president  of  Inter- 
national Standard  Electric  Corpora- 
tion, 67  Broad  Street,  New  York,  of 
an  agreement  reached  between  their 
respective  companies.  Under  the  terms 
of  the  contract,  the  assistance  of  the 
engineering,  manufacturing  and  com- 
mercial divisions  of  Cornell-Dubilier 
for  the  production  and  sale  of  electric 
capacitors  becomes  available  to  the  In- 
ternational Standard  Electric  through 
its  following  affiliated  manufacturing 
companies  abroad:  Le  Materiel  Tele- 
phonique,  46  Quai  de  Boulogne,  Bou- 
logne-Billancourt  (Seine),  France: 
Bell  Telephone  Manufacturing  Com- 
pany, Bubenbergplatz  10,  Berne,  Switz- 
erland; Standard  Telephone  und  Ra- 
dio A.  G.,  Seestrasse  395,  Zurich, 
Switzerland;  Bell  Telephone  Manufac- 
turing Company,  4  Rue  Boudewyns, 
Antwerp,  Belgium. 

Engineers,  representing  the  above- 
mentioned  companies,  are  in  America 
visiting  at  the  Cornell-Dubilier  plant 
in  South  Plainfield,  N.  J.  Cornell-Dubi- 
lier engineers  will  visit  at  the  Stand- 
ard factories  in  Europe  in  an  advisory 
capacity  in  the  near  future. 


Sales  Manager  Hal  Pauley  of  Pauley- 
James  Corp.,  Chicago,  visited  New 
York  and  Philadelphia  for  a  few  days 
recently  and  reported  a  large  backlog 
of  orders  for  their  new  line  of  push- 
pull  vibrators. 


ONE  thins  about  Radio  has  always 
struck  me  funny.  In  spite  of  its 
tremendous  advances  and  improvements, 
nothins  was  ever  done  about  its  Aerial- 
Receiver  connecting  system,  which,  until 
the  introduction  of  our  "CORNEX" 
idea,  has  remained  simply  a  messy  wire 
and  a  window  strip  in  millions  of  homes. 

The  fellow  who  thought  of  "COR-NEX" 
laid  an  egg  in  the  BEST  sense  of  that 
expression.  He  gave  to  Radio  something 
Radio  has  been  waiting  for  since  it  was 
knee-high  to  a  toadstool! 

He  made  a  hit  with  the  army  of  women 
who,  with  homes  that  are  modern  in  all 
other  respects,  have  been  putting  up  with 
ancient  Aerial-Receiver  connections  .  .  . 
and  NOT  liking  it' 

He  gave  to  Service  Men  (naturally, 
because  he  is  one  of  em)  a  new  profit 
possibility  ...  it  requires  little  more  than 
a  couplajiffies  to  install  "COR-NEX," 
and  there's  a  nice  "take"  on  each  job. 
Better  than  anything  else,  he  HELPED 
Radio  forward! 


"COR-NEX"  is  aces  with  me,  though  I 
did  NOT  think  of  it  myself.  It's  a  really 
basic  idea  for  the  good  of  the  order  .  .  . 
And  I've  yet  to  meet  up  with  my  first 
cold  water  douche  after  several  months 
of  "missionary  work"  in  the  tank  towns 
and  the  swank  towns  up  and  down  these 
old  United  States. 

Not  wishing  to  plagiarize  or  pun  or 
anything — "A  word  to  the  WIVES  is 
sufficient!" 


§&*&$($ 


CORNISH  WIRE  CO.,  Inc. 

30  Church   Street,  NEW  YORK  CITY 


KEN 


EPENDABLE        RADIO 


December,  1938 


41 


REPLHCEIHEI1T 


made 

AMAZINGLY 

SIMPLE 

•  Servicemen,  with  only  4  stand- 
ard types  of  Amperite  AC-DC 
Regulators  you  can  replace 
90%  (over  100  types)  of  AC- 
DC  Ballast  Tubes  now  in  use! 

Consult  your  jobber. 

•  Amperite  Regulators  are 
equipped  with  a  patented 
Automatic  Starting  Resistor  to 
prevent  untimely  burnouts  and 

save  pilot  lights. 

•  New  Low  Price  on  Amperite 
AC-DC  Regulators:  $1.00  LIST 

Amperite     Replacements 

for  2V  Battery  Set  ballasts 

$1.25  list 


fiMPERITE 
(ompany 


WRITE 
FOR 

CHART 
AR 


AMPERITE 

AUTOMATIC   REGULATORS 


Seven  stalwarts  of  the  Windy  City— left  to  right,  Haskell  Blair  Jim 
Ritter  of  the  David  Bogen  Co.;  A.  Poncher,  Ted  Piecko  Harry  Harri- 
son,  Sam    Poncher   and   John   Burke,   Newark   Electric    Co.,   Chicago 


NEW  BOOKLETS 


Westinghouse  Electric  &  Mfg.  Co.. 
East  Pittsburgh,  Pa. — general  catalog 
dated  1939-40  listing  some  100,000  styles 
and  sizes  of  Westinghouse  products. 
Limited  distribution. 

Wholesale  Radio  Service  Co.,  100 
Sixth  Ave.,  New  York  City — gift  cata- 
log, 64  pages  of  rotogravure,  for  Christ- 
mas, weddings,  birthdays,  graduations, 
etc.  Includes  cameras,  radios,  con- 
struction sets,  chemistry  sets,  etc. 

Speed     Nut      Division,     Tinnerman 


Stove  &  Range  Co.,  2058  Pulton  Road, 
Cleveland,  Ohio — literature  showing 
how  "Speed  Nuts"  may  take  the  place 
of  lock  washers  and  threaded  nuts,  in 
assembly  of  radio  cabinets,  automatic 
selector  brackets,  and  coil  cans. 

Institute  of  Radio  Engineers,  Inc., 
330  W.  42nd  St.,  New  York  City— 
"Standards  on  Transmitters  and  An- 
tennas,  1938."    Marked  50c.  postpaid. 

Tobe  Deutschmann  Corp.,  Canton, 
Mass.  —  A  Tobe  Filterette  catalog, 
showing  new  products  for  radio  noise 
elimination.  Includes  units  to  use  with 
razors,  oil  burners,  etc.,  and  presents 
the  Filterette  selector. 


I  mmmmnr 

ELECTROLYTIC 
CQRDENSEB 


Dumoni  ELECTRIC  CO 

514   BROADWAY,  NEW  YORK 


YOU 

Take  the  Premium 


'fake  the 

PROFITS 


THAT  just  about  sums  up  the  attitude  of  hundreds  of  Service- 
men and  Dealers  who  have  come  to  learn  that  Fancy  Deals, 
Inside  Propositions  can  never  be  a  substitute  for  a  quality  prod- 
uct with  real  not  fancied  profits.  TRIAD  TUBES  have  a  "cut 
and  dried",  "open  and  shut"  proposition:  Honestly  built,  qual- 
ity tubes  at  a  price  that  sives  you  a  LONG,  LONG,  PROFIT. 
Get  our  new  proposition  and  judge  for  yourself! 


THE  QUALITY  NAME 


IN    RADIO    TUBES 


MANUFACTURING   CO.,  INC. 
PAWTUCKET,   RHODE   ISLAND 


42 


Radio  Today 


Nash  Radio  Products  Co.,  5437  Lis- 
ette  Ave.,  St.  Louis,  Mo.— bulletin  list- 
ing Nash  products  sometimes  hard  to 
find:  record-cleaner,  recording  lubri- 
cant, cable  preservative,  radio  polish, 
aluminum  paint,  switch  cleaner,  ser- 
vice cement,  etc. 

Radio  Supply  Co.,  408  Montieello 
Ave.,  Norfolk,  Va.  —  Buying  Guide. 
1939,  with  225  pages  of  transmitting 
equipment,  testers,  parts,  for  service- 
men, hams  and  dealers. 

Operadio  Mfg.  Co.,  St.  Charles,  111. — 
bulletin  on  school  sound  distribution 
systems. 

Universal  Microphone  Co.,  Inglewood, 
Calif. — three  catalog  sheets  on  (1)  a 
new  microphone  bayonet  plug,  (2) 
manufacturer's  type  mike,  and  (3) 
microphone  circuit  for  the  new  micro- 
phone circuit. 

RCA  Mfg.  Co.,  Camden.  N.  J. — 
Christmas  catalog  of  200  Victor  and 
Bluebird  records  for  children.  Music 
ranges  from  "Snow  White"  excerpts 
to  semi-classical  disks  by  symphony 
orchestras. 

Kenyon  Transformer  Co.,  840  Barry 
St.,  New  York  City — revised  edition 
of  catalog  R3  on  replacement  trans- 
formers. Lists  unit  specifications  in 
table  form.  Copies  from  jobbers  or 
direct. 

Meissner  Mfg.  Co.,  Mt.  Carmel,  111. 
"How  to  Build  Radio  Receivers — 
Complete  Instructions  on  20  Meissner 
Kits."  Manual  has  120  pages 
8%"xll",  includes  discussion  on  ra- 
dio principles  and  construction  hints. 
Marked  50  cents. 

Hygrade  Sylvania  Corp.,  Em- 
porium, Pa. — completely  revised  tube 
characteristic  sheets,  concise  and  now 
adaptable  to  3-ring  binder  use. 

Hammarlund  Mfg.  Co.,  Inc.,  424 
W.  33rd  St.,  New  York  City — -"39" 
catalog  with  15  pages  and  illustra- 
tions on  midget  condensers,  trans- 
mitting condensers,  transmitting 
duals,  micro  condensers,  plug-in  coils, 
coil  forms  and  sockets,  star  condens- 
ers, R.F.  chokes,  I.F.  transformers, 
trimmers,  padders  and  receiver 
equipment. 

Atlas  Sound  Corp.,  1447-51  Thirty- 
ninth  St.,  Brooklyn,  N.  Y. — public 
address  catalog  No.  W-3  8.  Baffles, 
speakers,  trumpets,  parabolic  baffles, 
microphone  stands,  carrying  cases 
and  enclosures,  and  the  new  Atlas 
WX  type  marine  horns  for  cone 
speakers,  are  all  described.  Atlas 
will  send  copies  direct. 

General  Radio  Co.,  Cambridge, 
Mass. — catalog  K,  with  216  pages, 
including  many  new  instruments. 
"Largest  and  most  comprehensive  we 
have  ever  published,"  says  General, 
who  is  offering  the  catalog  to  broad- 
casters, manufacturers  and  engineers. 

Weston  Electrical  Instrument 
Corp.,  Newark,  N.  J. — second  issue  of 
"Weston  Pointer,"  featuring  stage- 
by-stage  receiver  analysis,  also  an 
article  on  resistance  range  limits  for 
practical  servicing.  This  illustrated 
journal  also  includes  service  hints, 
"idea"  box,  etc. 


RADIO  TODAY'S  LEADERSHIP 
proved  AGAIN! 


rt 


Advertising  pages  bring  results  for 
Rider  Chanalyst  at  the  lowest  cost 
per  inquiry  from  dealers  and  servicemen 


] 


Once  more,  RADIO  TODAY  has  shown  the  selling  power 
of  its  pages — the  responsiveness  of  its  dealer- readers. 

Witness  this  letter  from   Mr.  Lansford   F.  King,   Advertising 
Agency  for  the  Rider  Chanalyst  and  the  Rider  Manuals. 

Need  anything  more  be  said? — except  this: 

No  unselected  circulation,  however  great,  can  match  the  buy- 
ing power  of  RADIO  TODAY'S  22,000  handpicked  readers ! 

There   is   business  FOR  YOU  —  through  the  pages  of 


RADIO 
TODAY 


Member  Audit  Bureau  of  Circulations 

Galdwell-Olements,  Inc.,  480  Lexington  Avenue,  New  York 


December,  1938 


43 


Radio  Hardware 

FOR    MANUFACTURERS — PARTS 

JOBBERS 

A       DEPENDABLE       SOURCE       FOR 

YOUR       HARDWARE       mid 

ACCESSORY   NEEDS 

Jj  w      Carrying   in    Stock 

Stan  <1  a  r  il  and 
Many  Special 
Items  of  Radio 
Hardtvnre  Essen- 
tial in  the  Manu- 
facture and  Ser- 
vicing; of  Radio — 
Sound  Equipment 
«S  Aliied  Products. 
Many  Items  Diffi- 
cult to  Find  Are 
Stock    Items    With 

Us 
Check      This      List 
of     Items     Stocked 
for  Immediate  De- 
livery 
MACHINE  SCREWS 
NUTS — BOLTS 
WOOD  SCREWS 
METAL   TAPPING 

SCREWS 
TUBULAR  RIVETS 
EYELETS 
SPADE  BOLTS 
METAL  SPACERS 
THREADED  RODS 
SET  SCREWS 
ORNAMENTAL 

HEAD  SCREWS 
ESCUTCHEON 

SCREWS 
STEEL  WASHERS 
BRASS  WASHERS 
FIBRE  WASHERS 
LOCK  WASHERS 
GRID  CAPS 
CLAMPS — 

BRACKETS 
RUBBER 

GROMMETS 
RUBBER  BUMPERS 
INSULATION 
SOCKETS — 

SWITCHES 
BATTERY  CLIPS 
FUSE    MOUNTINGS 
ANTENNA 

COUPLERS 
TERMINAL  STRIPS 
PILOT   LIGHT 

SOCKETS 
SOLDERING 

TERMINALS 
SOLDER — PASTE 
WIRE — TAPE 
SPINTITE 

WRENCHES 
TIP  JACKS — PLUGS 
ETC. — ETC. 

AN'D    UNIT 

PACKAGES    OF 

HARDWARE 

FOR 

1  '  THE   JOBBER 

Catalog   Available    to   Manufacturers    and 

Parts    Jobbers — Write    for    Catalog    51 

FEDERAL  SALES  CO. 

24-2B     SO.     JEFFERSON      STREET 
CHICAGO,     ILL.,     U.S.A. 


How  to  "smoke  out"  a  prospective  buyer  as  demonstrated  by  Harry  Clip- 
pinger,   vice-president  and   sales   manager  of  Continental   Radio  and   Tele- 
vision Corp. 


TRADE  FLASHES 


Joe  Gerl,  president  of  Sonora  Radio 
d  Television  Corporation,  Chicago,  an- 
nounces the  appointment  of  James  G. 
Oldfield  as  production  superintendent 
of  Sonora's  new  plant.  Mr.  Oldfield 
brings  long  radio  experience  to  his 
new  post.  He  has  been  associated  for 
many  years  with  such  firms  as  Detrola, 
General  Household  Utilities,  Crosley, 
Majestic  and  others.  The  new  Sonora 
plant  with  an  estimated  daily  capacity 
of  2,000  receivers,  has  been  organized 
under  the  direction  of  Mr.  Oldfield  and 
is  working  at  top  speed  to  fill  current 
demands. 

Paul  H.  Tartak,  president  of  Oxford- 
Tartak  Radio  Corp.,  recently  acquired 
the  stock  originally  held  by  Harold 
Ebenholtz  in  the  Ariston  Mfg.  Corp. 
and  the  Ariston  Lab.  Inc.,  and  was 
elected  president  of  the  Ariston  or- 
ganizations. Walter  Bauman  was 
named  vice-president  in  charge  of 
sales.  No  change  in  the  policy  of  any 
of  the  companies  involved  will  be  made 
now.  Mr.  Ebenholtz  withdrew  from 
Ariston  because  of  ill  health. 


For  jobbers  who  need  various  types 
of  mikes  to  build  into  public  address 
systems,  Universal  Microphone  Co., 
Inglewood,  Calif.,  now  makes  available 
"manufacturer's  models"  of  the  firm's 
whole  line.  These  "undressed"  mikes, 
according  to  Universal  president  James 
R.  Fouch,  will  be  marked  with  the 
letters  MT  and  will  be  minus  the  ex- 
tra fittings. 

President  Hal  P.  Shearer  of  Hal  son 
Radio  d  Television,  Inc.,  of  Meriden, 
Conn.,  has  announced  the  appointment 
of  Martin  Openshaw  as  export  man- 
ager. Mr.  Openshaw,  who  has  a  back- 
ground of  many  years  in  the  radio 
export  field,  will  make  his  headquar- 
ters in  Meriden. 

Virgil  M.  Graham,  who  is  Hijgrade 
Sylvania  Corp.'s  tube  application  chief, 
has  been  re-elected  to  serve  a  second 
term  on  the  Board  of  Directors  of  the 
Institute  of  Radio  Engineers. 

Sales  manager  "Walt"  Marsh  of 
Meissner  Mfg.  Co.,  has  finished  a  trip 
through  Canada,  New  York,  Pennsyl- 
vania and  West  Virginia.  Mr.  Marsh 
reports  improved  business  conditions 
in  the  area,  and  says  also  that  he  no- 
ticed considerable  interest  in  television 
matters  among  engineers. 


JPP  ADJUSTABLE  BALLASTS...  J FD  BALLAST  TESTER 


Type  A 
8-prong 


THESE   3   WILL   REPLACE   99%   OF   ALL   AC-DC 
BALLASTS  NOW  IN   USE 


Once  adjusted,  these  ballasts  de- 
liver exact  voltage  of  ballasts  re- 
placed. Remain  accurate.  Lower 
investment,  smaller  stock,  no  ob- 
solete merchandise.  Adjust  with- 
out tools  or  experience.  Chart 
with  each  tube  shows  over  800 
AC-DC  ballasts  and  the  right  type 
of  JFD  adjustable  to  use.  List  price 
$1.00  each.  Dealer  and  servicemen's 
kit  No.  770  contains  five  ballasts — 
2  "A,"  2  "B,"  1  "C,"  with  chart 
and    instructions.    List    $5.00. 


THIS     INSTRUMENT    WILL    TEST     ALL    4     AND 
8-PRONG  BALLASTS 


Panel  has  direct  reading  instruc- 
tions for  all  settings.  So  simple 
and  easy  that  experience  is  un- 
necessary. Nothing  to  look  up.  No 
charts  needed  in  testing  90  per 
for  "Good,"  irrespective  of  opens, 
cent  of  all  ballasts.  Shows  red 
light  for  "Bad"  tube;  green  light 
Indispensible  and  profitable  addi- 
tion toyourtest  equipment.  Crackle 
finish;  silver  and  black  panel.  Op- 
erates on  AC  or  DC,  110  volts,  25 
to   60   cycles.      List,   $10.00. 


J.  F.  D.  MANUFACTURING  CO,  4111   Ft.  Hamilton  Pkwy.,  Brooklyn,  N.  Y. 

Export   Dept.,  116   Broad   St.,   New   York,    N.   Y.,   U.S.A.,   Cable    ICARAD   NY 


44 


Radio  Today 


Radio  veterans  Nat  Bolet  (right)  and  M.  B.  Sleeper  pause  in  front  of 

New  York's  Heins  &  Bolet  radio  shop  to  talk  over  old  times — and  the 

new    Andrea   receiver. 


Milton  Start  has  been  named  Mis- 
souri and  Kansas  representative  of  the 
Freed  Transformer  Co.  and  will  make 
his  headquarters  at  400  Kinloch  Bldg., 
St.   Louis. 

John  G.  Brooks  will  head  the  new 
sales  contest  and  premium  division  of 
Tracy-Wells  Co.,  Columbus,  Ohio,  effec- 
tive Jan.  1,  General  Manager  R.  C. 
Hager  has  announced.  Mr.  Brooks,  for- 
merly with  Zenith  and  Commonwealth 
Edison,  will  direct  new  contest  and 
catalog  ideas  and  will  enlarge  the  sales 
force. 

Harry  Boyd  Brown,  Philco's  national 
merchandising  manager,  was  conclud- 
ing speaker  December  13th,  in  the 
course  on  "The  Art  of  Salesmanship," 
conducted  under  the  auspices  of  the 
Massachusetts  State  Department  of  Ed- 
ucation at  Harvard  Hall,  Harvard  Uni- 
versity. Mr.  Brown,  who  spoke  on  "Ad- 
ventures in  Selling,"  was  the  last  of  a 
series  of  eight  speakers  prominent  in 
academic   and   business   fields. 

Newcomer  to  the  staff  of  William  K. 
Opdyke  <(  Staff,  Boston,  Mass.,  is  Elliott 
W.  Robbins,  who  was  formerly  New 
England  publicity  chief  for  N.  W.  Aver 
&  Son,  Inc.,  and  one-time  a  top  pub- 
licity director  for  NRA.  The  Opdyke 
organization  specializes  in  industrial 
editorial  relations. 


President  Max  Hass  of  Bud  Radio, 
Inc.,  5205  Cedar  Ave.,  Cleveland,  is  now 
in  the  Texas-Kansas-Ohio  areas  show- 
ing a  feature  film  on  "Bud's  Radio 
Wonderland."  The  movie,  which  is  a 
novel  series  of  scenes  having  to  do  with 
radio  production  and  development,  has 
already  been  shown  in  many  other  sec- 
tions of  the  U.  S.,  under  the  sponsor- 
ship of  local  jobbers,  radio  clubs,  con- 
ventions, trade  schools,  etc. 

The  name  of  the  Crosley  Radio  Corp. 
has  been  changed  to  Crosley  Corp.,  ac- 
cording to  news  from  president  Poivel 
Crosley,  Jr.  The  change  was  made  be- 
cause Crosley  officials  do  not  want  the 
public  to  feel  that  the  firm's  activity 
is  limited  to  radio.  However,  the  radio 
manufacturing  set-up  will  continue  as 
usual. 

Executive  vice-president  Lewis  M. 
Crosley  reports  that  the  company  now 
enjoys  peak-season  production  on 
radios,  and  has  re-employed  several 
hundred  workers.  Also,  the  plants  are 
now  producing  the  1939  line  of  refriger- 
ators and  appliances. 

Jobber  salesmen  throughout  the  U.  S. 
are  energetically  trying  for  places  on 
the  All-American  team  of  Star  Micro- 
phone Salesmen,  in  a  contest  sponsored 
by  Shure  Bros.,  225  W.  Huron  St.,  Chi- 
cago. Eleven  cash  prizes  go  with  the 
positions,  according  to  Coach  Jack 
Albert.  The  contest  closes  in  Decem- 
ber. 


Jai\e£te/  Jtotary  Converters 


FOR  CONVERTING  D.C.  TCTfl.C. 

•  Built  especially  for  radio  and  sound  apparatus — cap- 
acities 110  to  3250  volt  amperes — with  or  without  all 
wave  filters.  Dynamotor  construction — economical  to 
operate — ruggedly  built  for  years  of  trouble-free  service 
■ — used  or  recommended  by  the  largest  manufacturers  of 
radio  and  sound  apparatus  throughout  the  world  • 
WHY  EXPERIMENT  —  INSIST  ON  R  JflNETTE 

ASK  FOR   BULLETIN  13-1 


Janette  maiuitactuun^  Company 

556-558  TUestirUmcoe  Stceet  Chicago,  111.  "U.S.  JL 


MODERNIZE 
YOUR  SHOP 
for  GREATER 

PROFITS  ...at  almost 
am  no  cost  to  you  ! . . 


with  the 


ARCTURUS 
EQUIPMENT    DEAL 

You  profit  three  ways  with  the  Arcturus 
Equipment  Deal.  You  get  needed  shop 
equipment  of  standard  make  —  immedi- 
ately— at  almost  no  cost.  You  get  Radio's 
finest,  best  engineered  tubes.  This  means 
real  customer  satisfaction  on  every  sale. 
Last  but  not  least,  you  get  these  tubes  at 
standard  prices,  less  standard  discounts. 
Not  one  cent  has  been  added  to  allow 
for  the  shop  or  test  equipment  you  get. 
Arcturus  brings  it  to  you  practically  FREE! 

You  Can't  Lose! 

If  you  need  new 
radio  test  equip- 
ment, typewrit- 
ers, etc.  .  .  ■ 
If  you  want  to 
make  yours  the 
best  equipped 
shop  in  town  .  .  . 
Then  get  the  facts 
today.  Join  with 
the  countless  ser- 
vicemen  and 
dealers  who  are 
already  profiting 
from  Radio's  fin- 
est, fairest  and 
easiest  deal! 


EXPORT 
REPRESENTATIVES 

Arcturus  Franchises 
are  still  available  to  a 
few  alert  distributors  in 
certain  countries.  Sell 
a  line  that  has  set  high 
standards  of  tube  per- 
formance througout  the 
world  .  .  .  "Cash  in" 
on  the  huge  natural  re- 
placement market  cre- 
ated by  the  use  of  mil- 
lions of  Arcturus  Tubes 
as    original    equipment. 

Write  for  details. 


MAIL   THE   COUPON! 


ARCTURUS  RADIO  TUBE  CO.,  Newark,  N.  J. 

Without    cost    or    obligation    on    my    part, 
send   details  of  your  new  equipment   deal. 

Name    

Street    

City 

□  I   am   a   dealer 

My    Jobber    is 

For  your  convenience  this  coupon  tan  be  pasted  on  a  penny  postcard 


State 

□  I  am  a  serviceman 


December,  1938 


45 


> 


The  Original 


Strong!  Husky!  Dependable! 
It  rode  out  the  New  England 
hurricane!  A  telescoping  steel 
tubing  antenna  in  6'  units, 
extending  to  24'.  Easily 
mounted  on  ground  or  roof. 
Adaptable  to  RCA  Magic  "Wave 
Coupling  System.  For  real 
satisfaction,  sell  the  Preraax 
Vertical.  "Write  for  bulletins 
and    prices    today. 


Piemax  Products 

Div.   Chisholin-Ryder   Co., 

Inc. 

3915   Highland   Ave. 

NIAGARA    FALLS,    NT.    Y. 


SOUND  MEN! 


ARE  YOU  OVERLOOKING  C.I.S.E? 


See  what  FREE  membership  in  the 
Clarion  Institute  of  Sound  Engi- 
neers does  for  those  who  qualify! 
Gives  you 

Factory  purchasing  power! 
Exclusive  selling  territory! 
Free    engineering    and    consulting 


Competition-smashing   prices! 

Protected  profits  on  the  fastest- 
selling,  most  complete  line  of  P.A. 
equipment  in  the  world! 

Several   choice   territories   still   open. 
Send  today  for  complete  information! 


CLARION  INSTITUTE  OF  SOUND  ENGINEERS 
if    WOOSTER    STREET,    NEW    YORK    CITY 


J.  H.  CORNELL  NAMED 
SOLAR  CHIEF  ENGINEER 


J.  H.  Cornell  has  been  named  chief 
engineer  of  Solar  Mfg.  Corp.  of  New 
York  City  and  Bayonne,  N.  J.,  to  suc- 
ceed N.  Scholl,  resigned.  Mr.  Cornell 
came  to  Solar  early  this  year  from 
Magnavox  Company,  where  he  was 
chief  engineer  and  a  director.  Before 
that  he  was  with  RCA  and  General 
Electric. 

A  graduate  of  "Worcester  Polytech- 
nic Institute,  Mr.  Cornell  is  a  member 
of  I.R.E.  and  chairman  of  the  R.M.A. 
committee  on  electrolytic  capacitators. 
He  is  a  frequent  contributor  to  engi- 
neering publications. 

JOBBERS  AND  REPS, 

PENNSYLVANIA— Meyer  M.  Cohen 
now  heads  up  the  retail  dealer  promo- 
tion on  appliances  at  the  Crosley  dis- 
tributors, Anchor  Lite  Appliance  Co., 
Pittsburgh.  Harold  W.  Goldstein  is 
general   manager. 

Victor  Goldberg  is  a  new  field  repre- 
sentative in  Eastern  Pennsylvania  for 
Smith  Benny  Co.,  11  W.  42nd  St.,  New 
York  City,  who  are  the  eastern  sales 
representatives  for  Steem  Electric 
Corp. 

IOWA— Union  Supply  Co.,  4th  and 
Washington  Sts.,  Burlington,  have  been 
named  jobbers  for  Stromberg-Carlson 
in  a  section  of  southeastern  Iowa. 
Company  will  handle  complete  line, 
plus  parts.  C.  E.  Anderson  heads  the 
firm. 


jtmf 


When  fishing  calls,  Raymond  Beem  of 
Little  Rock,  Ark.,  leaves  Pa  Stone  in 
charge  of  his  radio  shop.  Here's  Pa 
with  the  inimitable  Charley  Golenpaul 
of  Aerovox  Corp. 


CD  PRESENTS 


ii   RADIO 
INTERFERENCE  FILTERS 


grand  new  money-makers! 

Every  service  call  you  make  is  a  chance 
to  increase  your  profit-making  opportuni- 
ties by  selling  a  CD  *  Quietone  radio  in- 
terference filter.  Here's  an  item  every 
set  owner  can  use.  And  squarely  behind 
this  filter  ...  is  C-D's  pledge  of  perform- 
ance ...  a  guarantee  that  dates  back  29 
years.  Investigate  the  profit  possibilities 
of  "Quietone"  today!  The  effectiveness 
of  eliminating  radio  interference,  caused 
by  household  appliances  of  all  types,  with 
C-D  "Quietone,"  available  at  your  local 
jobber.  Or  write  direct  for  Catalog 
No.  166A. 

•Keg.  U.S.  Pat.  Off. 


.  CORNELL-DUBILIER 

\electric  corporation 

I      1022 Hamilton  Bird.,  So.  Plainlield,  N.  J. 
Cable  AddreMi:  "CORDU" 


T.LAROSTAT 

YOUR  RESISTANCE  PROBLEM 


•  CLAROSTAT — "The  House  of  Resis- 
tors"— offers  every  type  of  essential  re- 
sistor and  control  •  The  next  time,  try 
a  CLAROSTAT  •  Meanwhile,  write  for 
catalog.  If  you  handle  servicing  ask  for 
208-page  service  manual.  (5c.  per  copy). 


CLAROSTAT 


<CLAR0S!AI5 


205  North  Sixth  St. 
Brooklyn.  >'.  Y. 


46 


Radio  Today 


•     INDEX     • 

TO 

ADVERTISEMENTS 


RADIO  RECEIVERS  Page 

CROSLEY   RADIO   CORP 4 

DUMONT  LABS.,  ALLEN   B.    (Television) 

Cover  IV 

GENERAL    ELECTRIC    CO Cover      II 

PHILCO   RADIO   &  TELEV.   CO 6 

PIERCE-AIRO.     INC 31 

PORT-O-MATIC    CORP 47 

RCA    MFG.    CO..    INC 3 

RADIO  TUBES 

ARCTURUS   RADIO  TUBE   CO 45 

HYGRADE    SYLVANIA    CORP 2 

KEN-RAD  TUBE  &  LAMP  CORP..   INC 41 

NATIONAL    UNION    RADIO    CORP 39 

PHILCO    RADIO    &    TELEVISION    CORP. 

Cover    III 

RAYTHEON    PRODUCTION    CORP 5 

RCA    MFG.    CO..    INC 37 

TRIAD    MFG.   CO..    INC 42 

TUNG-SOL    LAMP    WORKS.    INC 35 

RADIO    PARTS 

AEROVOX   CORP 36 

AMPERITE    CO 42 

CENTRALAB    32 

CLAROSTAT    MFG.    CO.,    INC 46 

CORNELL-DUBILIER    ELEC.    CORP 46 

DUMONT  ELEC.   CO 42 

INTERNATIONAL    RESISTANCE    CO 31 

JANETTE    MFG.    CO 45 

JFD    MFG.   CO 44 

MALLORY    &    CO.,    INC.,    P.    R 1 

MEISSNER    MFG.    CO 33 

MICAMOLD    RADIO    CORP 41 

NATIONAL    UNION    RADIO    CORP 39 

SOUND   EQUIPMENT 

AMPERITE    CO 48 

BOGEN    CO..    INC.,    DAVID 35 

CINAUDAGRAPH    CORP 38 

CLARION     INST.     (TRANSFORMER     CORP. 

OF  AMER.)    46 

RADOLEK    CO 47 

RCA   MFG.   CO.,   INC 35 

WHOLESALE    RADIO    SERVICE    CO..    INC..    48 

TEST    EQUIPMENT 

READRITE   METER  WORKS    38 

SERVICE    INSTRUMENTS.    INC 30 

TRIPLETT   ELEC.    INSTRUMENT   CO 40 

MISCELLANEOUS 

BURSTEIN-APPLEBEE   CO     40 

CORNISH    WIRE    CO..    INC 41 

CROSLEY    CORP 29 

FEDERAL  SALES   CO 44 

GARRARD    SALES    CORP 38 

GENERAL    INDUSTRIES    CO 48 

MFRS.  SCREW  &  SUPPLY   HOUSE 4S 

MUELLER    ELEC.    CO 39 

PREMAX   PRODUCTS   (CH ISHOLMRYDER)   46 

RADIO   CORPORATION    OF   AMERICA 25 

RADOLEK    CO 47 

RIDER,   JOHN    F 34 

WHOLESALE   RADIO   SERVICE   CO..   INC..    48 


While  every  precaution  is  taken  to  insure 
accuracy,  we  cannot  guarantee  against  the 
possibility  of  an  occasional  change  or 
omission   in   the   preparation   of  this   index. 


NEW  YORK— Baldwin  Piano  Co.,  20 
E.  54th  St.,  New  York  City,  is  now  the 
agency  for  Ansley  Radio  Corp.'s  "Dy- 
natone,"  the  combined  radio,  phono- 
graph and  electronic  piano.  Harold 
Morse  is  manager. 

Smith  Benny  Co.,  the  eastern  repre- 
sentatives for  Steem  Electric  Corp., 
have  named  a  new  field  representative 
for  New  York  State — Phil  Tepfer. 

Terminal  Radio  Corp.,  New  York 
City,  has  opened  a  new  midtown  store 
branch  at  68  "W.  45th  St.  The  com- 
pany's downtown  headquarters  are  at 
80  Cortlandt  St. 

Meetings  of  "The  Representatives" 
of  radio  parts  manufacturers  have  been 
announced  for  the  rest  of  the  1938-39 
season  by  president  D.  R.  Bittan,  53 
Park  Place,  New  York  City.  To  be 
held  at  the  Fifth  Avenue  Tavern,  4  W. 
40th  St.,  the  meetings  will  occur  on 
Dec.  13,  Jan.  10,  Feb.  14,  March  14, 
April  11,  May  9,  June  13. 

OHIO — New  jobber  for  Tung  Sol 
tubes  is  Supplies,  Inc.,  1013  Jefferson 
Ave.,  Toledo.  Executives  are  Clarence 
Kamm,  president;  Russell  F.  Kehr, 
treasurer;  and  Russell  F.  Teall,  vice- 
president. 

WEST  VIRGINIA— Sound  Systems, 
Inc.,  Huntington,  who  are  distributors 
for  Tung  Sol  tubes,  have  opened  a  new 
branch  at  407  Broad  St.,  Charleston. 

NEW  HAMPSHIRE— Radio  Service 
Laboratory  of  New  Hampshire  has  a 
new  co-owner  and  partner,  Fred  J. 
Wessner,  who  has  recently  joined  Ar- 
thur Levesque  at  Radio  Service  head- 
quarters at  Manchester.  Mr.  Wessner 
was  formerly  general  sales  manager 
for  National  Union,  and  until  the  re- 
cent change  was  sales  promotion  man- 
ager for  Webster,  Chicago.  Radio  Ser- 
vice operates  branches  at  34  Free  St.. 
Portland,  Me.,  188  S.  Main  St.,  Barre, 
Vt,  and  61  Main  St.,  Bangor,  Me. 

MISSOURI— Baldwin  Piano  Co.,  St. 
Louis,  are  now  agents  in  that  area  for 
Ansley  Radio  Corp.'s  new  "Dynatone." 
Lloyd  S.  Reynolds  is  manager. 


Philco  will  branch  out  to  sell  electric 
refrigerators  through  a  subsidiary,  Pres- 
ident  Larry   Gubb,   above,   announces. 


SEND  FOR  NEW 

CATALOG  DESCRIBING 

AMERICA'S  GREATEST 

PORTABLE  PHONO-RADIO 


and  complete  line  of  portables 

from  $54.50  to  $199.50 
A   live,   fast -moving   line  for 
Christmas  and  all-year  trade 

Write  Now 

THE  PORT-O-MATIC  CORP. 

1013   MADISON  AVE.  N.  Y.  C. 

Cable  Address:  PORTOMATIC,  New  York 


■fc  Everything  you  need  in  radio.  It's 
all  in  this  new  RADOLEK  RADIO 
PROFIT  GUIDE.  Every  repair  part 
for  every  receiver.  Newest  radio  sets. 
New  P. A.  Equipment.  Test  instru- 
ments. Books.  Includes  3,000  new 
items  over  previous  edition.  Every  item 
guaranteed.  It  must  he  right  or  we 
make   it   rioht. 

ic  Radolek's  immense  stock  plus 
Radolek's  efficient  organization  insures 
you  the  fastest  service.  25,000  Ser- 
vicemen and  dealers  now  depend  on 
this  service.  Radolek  Prices  are  lowest. 
You  get  Better  Quality,  bigger  selec- 
tion   and    Faster    Service    at    Radolek. 


She  RADOLEK  C° 

601  W.  Randolph,  Chicago,  Depi  D-26 
Send  me  the   1938   Radolek  Radio  Profit  Guide 
Free. 

Name    

Address     

Serviceman?  Q 


Dealer?  n        Experimenter?  □ 


December.  1938 


47 


qwei  you. 

HIGH  OR  LOW  PITCH 

WITH   THE   SAME   MICROPHONE 

With  the  flip  of  a  finger  you  can  now  (1)  lower 
or  raise  the  response  of  fhe  microphone.  .  .  (2) 
adjust  the  microphone  tor  most  desirable  re- 
sponse lor  close  talking  or  distant  pickup.  .  . 
(3)  adjust  the  system  to  any  "taste",  room  con- 
dition, or  equipment. 

MODELS  RBHk,  RBMk,  with  Acoustic  Compen- 
sator, frequency  range  40  to  1 1000  cps,  output, 
-65  db.,  complete  with  switch,  cable  connector 
and  25'  of  cable S42.00  LIST 

NEW!  MODEL  RSHk  (hi-imp);  RBSk 

(200  ohms)  Frequency  range  60  to  8000 
C.P.S.  Output  -68db. . . .  Chrome  or  Gun- 
metal $32.00  LIST 

NEW  LOW  PRICE  CONTACT  "MIKE" 

ModelSKH  (hi-imp);  SKL  (200  ohms)  S12.00  LIST 

MODELS  RAH-RAL,  excellent  for  speech  and 

music.  Reduce  feedback S22.00  LIST 

"Write  tor  Complete  Illustrated  Bulletins  and 
Valuable  Sales  Helps. 

A  „„rni»r  /C  561  BROADWAY,  N.  Y. 
f\MPERlTE  (0.  Cable  AddiessAlkem. New  York 


-^—     v^       MICROPHONE 


&«  ;.>*K> 


-.*>*" 


"     oAeT     -c*6    .s^     ooo^1 


..**>« 


UJH0L€5flL£  fiflDIO  5ERVIK  ! 

lOO  SIXTH  AVE.,  NEW  YORK,  N.  Y. 


ATLANTA,  GA. 
NEWARK.  N.  J. 


BOSTON,  MASS. 
JAMAICA.  L.  I. 


President  •/.  J.  Halm  of  Standard 
Transformer  Corp.,  1500  North  Halsted 
St.  Chicago,  announces  the  appoint- 
ment of  Yiiente  Casillas  as  manager  of 


Vicente  Casillas 

their  enlarged  foreign  sales  division. 
Mr.  Casillas,  a  veteran  of  the  radio 
and  electrical  export  field,  invites  dis- 
tributors in  foreign  markets  to  contact 
him. 


"RADIOS  AS  XMAS  GIFTS" 

Editor  Radio  Today: 

I  caught  your  very  interesting  broad- 
cast of  Dec.  2  over  WEAF  and  the  NBC 
Red  Network,  on  "Selecting  a  Radio  as 
a  Christmas  Gift."  Needless  to  say  I 
enjoyed  it  immensely. 

It  was  a  fine  presentation  of  Radio's 
new  developments  and  should  go  a 
long  way  in  making  the  public  more 
radio-conscious  this  Christmas.  I  ad- 
mire the  way  you  gave  practically 
every  manufacturer  a  little  "plug." 

In  short,  I  think  the  industry  owes 
you  a  vote  of  thanks  for  this  coopera- 
tion— it  proves  conclusively  that  you 
have  their  interests  at  heart  and  are 
doing  all  in  your  power  to  help  them 
all. 

H.  W.  Gregg 
H.  P.  Bridge  Co., 
Philadelphia,  Pa. 


U,  S.  TUBES  IN  MEXICO 


S£Sfc>4« 


Recently  into  picturesque  Mexico  went 
Hygrade  Sylvania's  export  manager, 
Walter  A.  Coogan.  He's  shown  here 
with  Sylvania  rep  B.  Jiminez,  along 
with  local  dealers  R.  Silva  and  J. 
Suarez. 


M0Bi«  PORTAGES. 


"*£jj— 


Model    CX.     An    8",    9",    10"    or 
12"    turntable    is    supplied. 

"Y"OU'LL     sell     more     portable 
-1-   and  table-model  phonographs 
with     this     new  -  design,     light- 
weight    constant    speed    General 
Industries    motor. 
Self-starting    induction    type.      Quickly    de- 
velops full  required  speed.    Fan  cooled.    Silent, 
helical-cut    gears    and    bearings     in    sealed    oil 
chamber.      Patented  drive  gives  turntable    (not 
shown)    positive   insulation    between    the    turn- 
table and   motor. 

Order  a  sample  of  Model  CX  for  testing. 
Be  sure  to  state  frequency  of  current  you  use, 
and   size  of   turntable   required. 

^General  Industries  Co.. 

3838    Taylor    Street,    Elyria,    Ohio 


NEW  CATALOG 

OF  "STRONGHOLD'  HARDWARE 

SAVES  TIME  &  MONEY 


Thousands 
of  Hard-to- 
Get  I  terns  ! 
C  o  m  pi  ete 
Plated 
Stocks  — 
/  m  mediate 
Shipment! 


All  your  hardware  from  one 
source:  Screws,  Bolts,  Nuts, 
Rivets,  Washers,  Terminals, 
Spacers — everything  in  fasten- 
ing devices!  *  Write  for  your 
free  copy  NOW — Send  us  Sam- 
ples to  Match — Specials  are 
our  Specialty. 

MANUFACTURERS 
SCREW  &  SUPPLY  HOUSE 

215-A  West   Illinois  St.,  Chicago,   U.S.A. 


48 


Radio  Today 


# 


are  your 

Entering 


TT 


WwerSt/es 

Because  they  bear  the  best-known, 
most-asked-for  name  in  radio,  Philco 
Tubes  bring  more  radio  owners  into 
your  store  .  •  .  give  you  more  con- 
tacts. And  each  contact  means  an- 
other opportunity  to  show  and  sell 
Philco  Radios.  Thus  Philco  Tubes 
serve  as  your  entering  wedge  to  big- 
ger   sales    and     substantial     profits. 


"Hut  £uuit  7uded.  Uet&e  lOot/c/ fa  SkU, 


rt 


TELEVISION 


by 

FIRST 

ON    THE 

MARKET.  ..Why? 


■ 


it  un  u 

TELEVISION 

nun 


msM 


W  t  IX  IN  \J  Vy  the  Du  Mont  Television  Receiver  is  ready ...  the  "bugs"  are 
out  of  it . . .  it's  a  practical,  quality  set  that's  readily  saleable.  Du  Mont's 
complete  experience  in  the  development  and  building  of  cathode  ray 
tubes,  sweep  circuits,  amplifiers  and  high  voltage  power  supplies  .  . 
gained  through  eight  years  of  designing  and  manufacturing  world  famous 
quality  oscillographs  .  . .  makes  Du  Mont  logical  leaders  in  the  television 
field   where  these  same  units  are  essential   parts. 

Vv   t       l\  IN  \J   yy       that   very   soon    scheduled   telecasts   will    be   offered    in    New 
York  and  other  large  centers  of  population. 

Vv   t      l\  IN  V-/   yy       that  you,   the    Progressive    Dealer,   want    to   be    on    hand  .  .  . 
ready  too  .  .  .  when  the  gun   is  fired. 

Vy   £      Ix  IN  \J   yy       that  now  is   none  too  soon  to  start  your  sales  program. 


0CT   -m     Display   and   Sell    DU    MONT 


ALLEN  B.  DU  MONT  LABORATORIES,  INC.,  2  Main  Ave.,  Passaic,  N.  J.